CN112004608A - Spraying device - Google Patents

Abstract

The invention relates to a spraying device for spraying a liquid, in particular in the low-pressure range, the spraying device (10; 90; 110; 40; 160; 170; 190; 220) being designed to be hand-held and manually operable, the spraying device comprising a spray head (16) and a handle element (14); a fluid line (26; 92; 172) having an inlet (34) for delivering liquid and an outlet (40) arranged on the spray head for spraying liquid; an actuating element (30) for influencing the valve element (28), by means of which the passage of liquid through the fluid line (26; 92; 172) can be selectively released or blocked; preferably an electric drive device (52) having a drive motor (54) which is connected to the fluid line (26; 92; 172), wherein the fluid line (26; 92; 172) can be continuously moved in a defined manner by the drive device (52) for changing the position and/or orientation of the outlet (40).

Description

Spraying device

Technical Field

The invention relates to a spray device for spraying liquids, in particular in the low-pressure range, which is designed to be hand-held and manually operable, comprising a spray head and a handle element, a fluid line having an inlet for delivering the liquid and an outlet for spraying the liquid, an operating element for influencing a valve element via which the passage of the liquid through the fluid line can be selectively released or blocked.

Background

Such spraying devices, in particular in the pressure range of the liquid to be sprayed, of about 0.5bar up to 25bar (in what is currently considered to be a low pressure range, typically of about 1bar to 8bar for example), can be used in particular in houses and garden areas, where the liquid is water. Accordingly, the spray device is especially handheld and manually operable and is designed, for example, as a spray gun. The user can hold the spraying device on the handle element and control the liquid emission from the spray head by means of the operating element. The spraying device can be used, for example, for cleaning purposes, wherein especially loose, less tenacious dirt is washed away by the liquid jet. It is also conceivable to use the spraying device for irrigation purposes.

DE 20103259U 1 describes a manual nozzle for discharging liquids, which is used, for example, in the low-pressure range. On the output side, the manual nozzle comprises a rotor nozzle unit which, when loaded with liquid, should rotate in a cone curve. However, manual nozzles have proven to be less reliable when used in the low pressure range because the liquid pressure is too low to start or maintain the rotor in motion. It has therefore been found in practice that reliable cleaning can be achieved with rotor nozzles only in the high-pressure range above approximately 20 bar.

A flexible oscillating nozzle for emitting a fluid is described in WO 2007/131533 a 1. On the output side, the nozzle has a flexible hose line which is fixed to one end, while the other end is freely movable. The free end moves in a random manner when the liquid is applied. This makes it more difficult to obtain consistent work results.

The same applies to the spraying device described in DE 102007028244 a 1. At the free end of the flexible hose line suspended in a pendulum manner, a deflecting mechanism is arranged, which emits a liquid jet in different directions depending on its position. In pendulum movement, the redirecting means hits the working housing, whereby the position of the redirecting means and thus the direction of the emitted liquid jet is changed. However, as in WO 2007/131533 a1, the direction of the liquid jet is also incidental in the spraying device of DE 102007028244 a 1.

In US 2015/0273489 a1 a spraying device is described in which the incoming liquid can flow through a rotor having a curved passage. On the output side, the channel leads to a nozzle which is supported on the bearing housing and can be moved along the cone curve. The spraying device is pressure-actuated, wherein the movement of the nozzle is actuated depending on the shape of the channel. In addition to the complicated construction, the usability of the spray device has proven to be limited, since the movement of the spray nozzle is activated only at relatively high pressures, similar to that in DE 20103259U 1.

WO 00/07734 a2 describes a nozzle for discharging a liquid. The nozzle has a resilient intermediate region, whereby the nozzle is not bent in a folded manner.

WO 2016/165738 a1 describes a spray device in the form of a spray gun with which different spray patterns can be produced. The spraying device comprises a point-jet nozzle, a flat-jet nozzle, an atomizing nozzle and a shower head, which can be placed selectively in flow connection with a delivery line for the liquid.

DE 10236266 a1 describes a material discharge device for high-pressure applications, which is suitable for discharging liquids such as adhesives and sealants.

Disclosure of Invention

The object of the invention is to provide a spraying device of the type mentioned at the beginning which is versatile.

In a generic spray device, this object is achieved in that the spray device comprises a preferably electric drive device having a drive motor, which drive device is connected to a fluid line, wherein the fluid line can be moved continuously in a defined manner via the drive device for changing the position and/or orientation of the outlet.

It is an advantage in the spraying device according to the invention that the positioning of the outlet and/or the orientation of the outlet can be varied in a defined manner. In this case, preference is given in particular to the possibility of changing the position of the outlet by a lateral movement, which for example leads to a parallel offset of the emitted liquid jet. In addition or alternatively, it is preferably provided that the outlet is changed in its orientation such that the direction of the emitted liquid jet reverses. In order to vary the positioning and/or orientation of the outlet, the spraying device according to the invention comprises a drive means, which is preferably electrical. The drive means includes a drive motor directly or indirectly connected to the fluid line. This offers the advantage that the fluid line can be continuously influenced in order to be able to achieve a permanent movement and/or change in orientation of the outlet in a defined manner. Due to the use of the drive means, the resulting movement of the emitted liquid jet is independent of external conditions, for example independent of the pressure of the inflowing liquid. In contrast to the spray devices as disclosed in the initially cited printed documents DE 20103259U 1 and US 2015/0273489 a1, a reliable function of the spray device can be ensured even in low pressure ranges in which a continuous and defined pressure-assisted movement of the outlet cannot be achieved.

The movement of the liquid jet provides, for example, the advantage that the cleaning efficiency or irrigation efficiency can be increased by increasing the area efficiency. This is particularly accompanied by easier application. The direction and/or positioning of the emitted liquid jet can be changed by means of the drive means without the user moving the spraying device. Thus, the spraying device has also proven to be an easy-to-use application.

For easy-to-use applications, it is furthermore advantageous if an actuating element is arranged on the handle element, which actuating element allows the user to selectively release or block the fluid line for discharging the liquid with the spray device. Thereby, a higher versatility of the spraying device is enabled. A valve element may be arranged on or in the fluid line or on or in a fluid line which is fluidly connected to the fluid line.

Advantageously, the operating element is arranged on the handle element and is in this way easily accessible to the user.

It will be appreciated that in an advantageous embodiment, more fluid lines may be provided than just one fluid line. Accordingly, the spraying device according to the invention can have at least one fluid line. At least one inlet and at least one outlet may be provided in a corresponding manner. Alternatively or additionally, at least one drive is provided. In an advantageous embodiment, it can be provided that the drive is connected to more than one fluid line. Alternatively, a separate drive device may be associated with each fluid line.

In an advantageous embodiment of the spraying device according to the invention, the drive means are mechanically connected to the fluid line. In this way, the fluid line can be influenced mechanically continuously via the drive.

Alternatively or additionally, it may be provided that the drive is magnetically connected to the fluid line.

Advantageously, the fluid line comprises or forms a nozzle at the outlet, or the outlet is formed by a nozzle. By means of the nozzle, a defined liquid jet can be provided, which can in particular be a punctiform jet.

It may be provided that the exit direction of the liquid through the nozzle extends along the axis of the fluid line, and correspondingly the nozzle axis may be aligned with the axis of the fluid line, for example with the axis at the inlet of the fluid line.

Alternatively, it can be provided that the exit direction of the liquid through the nozzle is oriented obliquely to the axis of the fluid line. Accordingly, the nozzle axis may include an angle with the axis of the fluid line. The angle is preferably about 0.5 ° to 10 °.

Preferably, the outlet is configured for outputting a punctiform jet, in particular through the above-mentioned nozzle. In the present case, a punctiform jet is understood to be a liquid jet which is spatially collimated at the outlet, which in particular has a substantially circular cross section, and which has a relatively small spread over the usual working distance of the spraying device in its intended use. A punctiform jet of high jet quality can be provided even in the low pressure range. By varying the positioning and/or orientation of the outlets, the point jet can be moved to improve area efficiency.

In general, it can be provided that the outlet moves in a completely different manner. For example, the outlet can be movable in at least one spatial direction, can be tiltable in at least one spatial direction, can be swingable and/or can be rotatable. For example, in a flipped state, the outlet may rotate and/or move relative to a reference axis (e.g., an axis of the fluid line).

In an advantageous embodiment of the spray device according to the invention, it can be provided that the outlet can be moved in such a way that the spray jet of the spray device exhibits a conical curvature (of an extended cone). In this way, the function of the rotor nozzle in the low-pressure range can be simulated using the drive. In contrast to rotor nozzles, which are used, for example, in the high-pressure range, the movement of the outlet is not initiated and maintained by the liquid pressure, but rather is effected by means of a drive motor. Since the movement of the outlet does not cause a pressure loss, the jet quality can be permanently maintained even in the case of movement of the outlet.

The opening angle of the cone is advantageously, for example, approximately 1 ° to 20 °.

In a corresponding manner, in an advantageous embodiment of the spray device according to the invention, it is advantageous if the outlet can be moved in such a way that the spray of the spray device can be output in one plane. This enables simulating a flat jet with a spraying device. In the case of use in which the spray device is intended to be used with the handle element arranged below with respect to the direction of gravity, this plane is oriented, for example, horizontally and perpendicularly to the direction of gravity.

Advantageously, the spraying device comprises a holding element, on which the outlet, in particular the nozzle, rests or is fixed. By means of the retaining element, a defined and possibly variable positioning of the outlet, in particular of the nozzle, can be provided. In order to move the outlet, the holding element can be moved relative to the housing of the spraying device, in particular by means of a drive. Advantageously, a guide for the movement of the holding element is provided. Alternatively, the holding element can be fixed in a non-movable manner, for example, on a housing of the spraying device, wherein the outlet can be moved in abutment with the holding element, in particular for changing the direction of the emitted liquid jet.

The holding element can be fixed to the housing or formed integrally with the housing, for example.

For example, the holding element comprises or forms a bearing shell on which the outlet rolls. Accordingly, the outlet may be arranged "azimuthally fixed" on the bearing housing, but its orientation is variable due to the possibility of rolling on it.

Alternatively, the fluid line can engage with a movably designed holding element, for example with the outlet and in particular with the nozzle, in order to change its position and/or orientation.

In a further advantageous embodiment of the spray device according to the invention, it can be provided that the outlet is not fixed by means of a holding element and is freely movable. The outlet on the free end of the fluid line may be moved to change the position and/or orientation due to the movement of the fluid line.

Advantageously, the drive device is connected to an outlet, in particular a nozzle, and acts on the fluid line at or near the outlet. For example, the drive means acts on the outlet to move the outlet relative to the housing of the spraying device and/or to change its orientation. This, for example, makes it possible to output the jet of the spray device on a cone surface or in a plane as described above.

Alternatively or additionally, it can be provided that the drive is connected to the fluid line at a distance from the outlet opening, at the outlet opening, in the inflow direction of the liquid to be sprayed. This connection can be provided both in embodiments in which the outlet of the spraying device, in particular the nozzle, is attached or fixed to the retaining element and in embodiments in which the outlet is not fixed by means of the retaining element but is freely movable.

Advantageously, the fluid line is held fixed in position on the spraying device at the inlet.

At the inlet, a coupling element for coupling an external supply line for the liquid can be arranged. The coupling element is, for example, a coupling element of a plug adapter, and the external feed line is a hose line with a corresponding coupling element.

Alternatively, it can be provided that the fluid line is coupled with the inlet fluid-tightly to the outlet of a further fluid line of the spraying device. The further fluid line itself has, for example, the above-described coupling element.

In a preferred embodiment, it is advantageous if the spraying device has no movable sealing point on the fluid line, in particular at its inlet. It is therefore advantageous if the inlet opening is arranged in a fixed position and in a non-movable manner on the spraying device.

It has proven advantageous if the fluid line is designed at least in sections as a flexible hose line. In this way, it is structurally facilitated to move the fluid line by means of the drive device. The energy required for deforming the flexible hose line in order to move the outlet is thus relatively low. The spraying device thus has a long service life in battery operation. In general, the fluid line can be designed as a flexible hose line.

The fluid line is advantageously at least sectionally rigid. This can increase the pressure resistance of the fluid line, for example. It can be provided that the fluid line is designed to be rigid overall.

In an advantageous embodiment of the spraying device, the fluid line comprises two, preferably rigid, fluid line sections which are movably connected to one another by means of a hinge element and can be tilted relative to one another, wherein the drive device is connected to one of the fluid line sections. The hinge elements make it easier for the fluid line sections to move relative to each other. The hinge element is made of an elastically deformable material, for example in the form of a bellows or a collar, wherein the fluid line sections engage into the hinge element from opposite sides.

According to the invention, the drive is preferably an electric drive and has a drive motor. This enables a structurally simple design of the spraying device while having a reliable function. The electric drive also enables a compact design of the spray device.

However, the drive can also be designed in a different manner. The invention reserves the replacement of the electric drive with another type of drive having a drive motor. For example, the other type of drive is a pneumatic drive. Hydraulic drives are also conceivable. The hydraulic drive comprises, for example, a hydraulic motor having, for example, a turbine which can be driven by the liquid to be sprayed and which is connected to the fluid line.

The drive motor may preferably be a low voltage motor.

Advantageously, the vibration of the drive motor is transmitted at least in a damped manner to the housing of the spraying device, for example to the handle element. In this way, the user is given tactile feedback about the operation of the drive device.

Advantageously, the spraying device comprises at least one battery, preferably rechargeable, for supplying energy to the drive means. At least one battery, in particular a battery for powering the low voltage motor, may be carried in the spraying device. No cables need to be used for energy supply. In this way the application and the working radius of the spraying device are increased.

Advantageously, the at least one battery can be charged in the spraying device, which for this purpose can preferably have an electrical coupling element for coupling with the charging device. Alternatively or additionally, it can be provided that the at least one battery can be removed from the spraying device, preferably manually and without tools.

The at least one battery is for example accommodated in a housing of the spraying device. For example, it is provided that at least one battery is accommodated in the spray head. It is advantageously possible to remove the battery from the housing via a removal opening which is arranged on the side of the housing opposite the outlet. In this case, the at least one battery is arranged, for example, in a receiving space common to the drive motor, which is substantially fluid-tight sealed with respect to a receiving space in which the fluid line and, if applicable, components of the drive device are located.

The at least one battery and the drive motor are advantageously positioned in the spray head one behind the other with respect to the longitudinal direction of the spray head. Advantageously, the fluid line is arranged below the drive motor with respect to the intended use of the spray device.

In a preferred embodiment of the spraying device, it can be provided that at least one battery is accommodated in the handle element.

In an advantageous embodiment of the spray device, it can be provided that the drive motor is designed for operation at a mains voltage (for example 230V or 110V) and that the spray device comprises a mains cable for coupling to a mains supply.

The relatively short design of the spray device is preferably achieved in that the drive motor is accommodated laterally alongside the fluid line in the housing of the spray device. In the present case, "laterally next to" also includes in particular the case in which the drive motor is arranged above the fluid line during the intended use of the spraying device.

For example, the drive motor is arranged with the drive shaft offset relative to a central longitudinal plane of the spraying device, wherein the fluid line advantageously extends in the central longitudinal plane. In practice, it has been found that a compact design of the spraying device, in particular of the spray head, can be provided in this way.

The relatively elongate, more precisely longitudinally extending, design of the spray device is preferably realized in such a way that the drive motor is axially advanced in relation to the flow direction of the liquid to be sprayed in the fluid line.

Advantageously, the drive means can be selectively switched on and off by a user, and the spraying device comprises a trigger element for activating the drive means. This allows the user to activate and deactivate the drive means as required. Thereby, the spraying device has a high diversity.

Advantageously, the aforementioned triggering element can be actuated independently of the actuating element. This promotes the versatility of the sprinkler.

In order to improve the actuation, it can be provided that the actuating element forms a triggering element. For example, when the actuating element is actuated, the fluid line for discharging the liquid is first released, for example, by pressing or pulling the actuating element only slightly. Upon further actuation, for example upon a stronger pressing or pulling, the actuating element acts as a trigger element and causes the drive to be activated.

In contrast, it can be provided in a similar manner that upon actuation of the actuating element, for example upon slight actuation, both the fluid line is released and the drive is activated. In the case of a stronger actuation, the fluid line remains released, but the drive is deactivated.

Accordingly, it can be provided that the actuating element can be actuated in two stages, wherein the actuating element serves as a triggering element in at least one stage. Upon actuation, the passage of the liquid can be released first, and upon further actuation, the drive device can be activated. The "two-stage" does not require that the switching stage is visually perceptible by the user on the actuating element.

The drive device, in particular the drive motor, is accommodated, for example, in a spray head of the spraying apparatus.

Advantageous embodiments of the spraying device according to the invention comprise or are designed as a spray gun or a lance (for example of a watering bar).

In the case of a spray gun, the angle between the handle element and the spray head is, for example, approximately 90 ° to 160 °, preferably approximately 100 ° to 140 °, more preferably approximately 110 ° to 120 °.

In an advantageous embodiment, the spraying device can be designed, for example, in a straight line, for example in the form of a rod.

It can be provided that the spray head projects beyond the handle element on both sides in the longitudinal direction of the spraying device. For example, an axis of the handle element extends through the spray head, wherein the at least one battery and the drive motor are positioned on mutually opposite sides of the axis. Alternatively, it can be provided that the spray head is arranged at an angular position relative to the handle element and projects from the latter in only one direction in the longitudinal direction of the spraying device.

In an advantageous embodiment of the spray device, it is advantageous if, in particular for the purpose of mechanically connecting the drive to the fluid line, the drive comprises an eccentric body which can be driven in rotation about a rotational axis. The eccentric body in particular defines or has a rotational axis in order to enable the eccentric body to be driven in rotation directly or indirectly by a drive device. The eccentric body can in particular be connected to the fluid line directly or indirectly eccentrically with respect to the axis of rotation.

Advantageously, a guide is provided for rotating the eccentric body relative to the housing of the spraying device. A defined rotation of the eccentric body and thus a defined movement of the outlet is ensured via the guide.

It can be provided that the eccentric body is designed in one piece. Alternatively, the eccentric body may comprise two or more elements connected to each other and cooperating.

Advantageously, the eccentric body comprises or is configured with a drive wheel with a receptacle arranged eccentrically with respect to the axis of rotation, or comprises or is configured with a drive wheel and a receptacle arranged eccentrically with respect to the axis of rotation. The fluid line can engage, for example, in a receptacle designed as an engagement opening. Alternatively or additionally, the fluid line can pass through a receptacle configured as a through-opening.

It may be provided that the drive wheel is in contact with the fluid line in order to move the outlet according to the invention continuously and in a defined manner. Alternatively, it can be provided that the movement of the outlet is caused by a further element of the drive device which is operatively connected to the drive wheel.

It can be provided that the fluid line engages into the receptacle on the side remote from the outlet and is thereby moved on the side remote from the outlet. In the latter case, the receptacle can be designed, for example, as a blind hole.

Advantageously, the eccentric body comprises or is configured with a cover element which closes an opening of the housing of the spraying device and has an exit opening for the liquid issuing from the outlet. The liquid jet is emitted through the cover element. A separate cover element on the housing can thereby be dispensed with. This simplifies the structural design of the spraying device.

Preferably, the cover element is connected in a rotationally fixed manner (drehfest) to the drive wheel. In this way, the cover element is made rotatable about the axis of rotation. For example, the outlet engages in an engagement opening of the cover element.

Advantageously, the cover element forms the aforementioned retaining element, or vice versa. In this case, it is provided in particular that the fluid line rests on the cover element, in particular with the outlet and in particular with the above-mentioned nozzle. The outlet can be moved with a change in position and orientation when the cover element is rotated.

The drive wheel and/or the cover element are advantageously designed to be rotationally movable relative to the fluid line, wherein the fluid line is in particular in direct or indirect contact with an edge of the drive wheel or of the receptacle of the cover element. Rotation of the drive wheel or cover element can in this way effect a movement of the fluid line, wherein the fluid line is deflected but does not rotate itself. This facilitates coupling of the fluid line at the inlet with another fluid line without the need for a movable sealing position, for example. The fluid line can be moved in a structurally simple and reliable manner if it is designed as a flexible hose line or has a hinge element as described above. The fluid line can, for example, bear directly against the edge of the mold receptacle. Alternatively, the fluid line may be in contact with the edge of the receptacle, for example indirectly via a sleeve surrounding the fluid line.

In a preferred embodiment, an intermediate element is provided on the eccentric between the drive wheel and the cover element, via which intermediate element the eccentric is axially and/or radially supported on the housing of the spraying device. For example, the intermediate element is designed with a guide or a bearing for the eccentric body on the housing. It may be provided that ribs and grooves are provided on the intermediate element and on the housing, which ribs and grooves establish the engagement. The intermediate element is formed, for example, in a ring shape.

The elements of the eccentric body are, for example, connected to one another in a locking manner. For example, the drive wheel is connected with the intermediate element and/or the cover element by locking via a locking hook. The cover element is lockingly connected with the drive wheel and/or the intermediate element, for example via a locking mechanism.

In a preferred embodiment, the drive wheel bears axially on both sides in a sliding manner, for example in the form of a flange, against support elements which are fixed to the housing of the spraying device. In this way, the drive wheel is immovably fixed in the housing and can be rotated to deflect the fluid line.

The drive wheel is designed, for example, as a gear wheel which can be driven in rotation via a gear wheel fixed to the drive shaft of the drive motor.

In other types of embodiments, the drive wheel may be fixed to the drive shaft of the drive motor.

In an advantageous embodiment of the spraying device, the eccentric body advantageously comprises an eccentric element arranged eccentrically with respect to the axis of rotation, which eccentric element engages with an interface element mounted pivotably on the spraying device, on which element the fluid line is held indirectly or directly. An eccentric body, which is designed as an eccentric, for example, comprises this eccentric element, for example a lug. The eccentric element engages with the pivotably mounted contact element and, for example, engages in the receptacle. When the eccentric body rotates, the connecting elements can move back and forth in a pendulum-type manner. This motion may be transmitted to the fluid circuit indirectly or directly. The connecting element is mounted, for example, so as to be pivotable in a housing of the spraying device.

The contact element is advantageously connected to a pushing element which is mounted on the spraying device in a movable manner, wherein preferably a guide for the pushing element is provided in the housing of the spraying device. The oscillating movement of the adjoining elements can be transmitted to the pushing element in this way. This gives the possibility of moving the fluid line, in particular its outlet, back and forth via the movement of the pushing element.

The guide can be fixed to the housing or formed integrally with the housing, for example.

The interface element and/or the pushing element preferably comprise an opening, wherein the fluid line engages into or passes through the opening. For example, the fluid line engages with the outlet in an opening of the pushing element, so that the outlet can be moved by means of the pushing element.

In an advantageous embodiment of the spraying device, it can be provided that the drive device comprises or is formed with a drive element via which the fluid line can be rotated about its axis. For example, the drive element is driven via a shaft of a drive motor. The drive element can be brought into engagement with the fluid line directly or indirectly.

The drive element is, for example, a transmission element, such as a drive belt, which is connected to the drive shaft and the fluid line.

An imbalance element for providing an imbalance is preferably arranged on the fluid line, in particular at the outlet. The unbalanced element causes a change in the location and/or orientation of the outlet as the fluid line rotates.

In an advantageous embodiment of the spraying device, it can be provided that the drive device comprises or is designed as a vibration element, which is mechanically connected to the fluid line. The fluid line may move due to the vibration of the vibrating element.

As already mentioned above, the drive device can be magnetically connected to the fluid line. For example, a magnetic element is fixed to a fluid line, particularly a flexible hose line. The magnetic element may cooperate with a further magnetic element, which may be moved, for example, by a drive means.

In an advantageous embodiment, for example, a drive wheel is provided on which the magnetic element is fastened and which can be driven in rotation by a drive device, for example the drive motor described above. The magnetic element acts on a magnetic element which is fixed to the fluid line, so that it can be regularly deflected, for example.

Advantageously, the spraying device comprises at the outlet an adjusting element having two or more spray pattern openings selectively positionable in alignment with the outlet for constituting different spray patterns with the spraying device. The spraying device has a higher versatility in this way. Depending on requirements, it is possible to generate different spray patterns. For example, in the case of an opening of a spray pattern, the punctiform spray emitted by the fluid line can remain unchanged.

In the case of a further spray pattern opening, the liquid jet may for example be dispersed in order to provide a kind of "rain-like spray". In the case of further spray pattern openings, for example, the possibility exists of narrowing the liquid jet and providing a narrow, punctiform jet with a greater jet intensity.

For actuating the adjusting element, it is advantageous if the adjusting element can be adjusted manually by the user.

It has proven advantageous if the drive can be activated and/or deactivated depending on the position of the actuating element. For example, it is provided that a continuously defined movement of the fluid line according to the invention is intended to be associated with one of the spray pattern openings, whereas it is not provided, usable or intended that this movement is associated with the other spray pattern opening. For example, the position of the adjusting element can be mechanically detected and the drive can be switched off when the adjusting element assumes a position in which no fluid movement is provided, desired or required. It is also possible to provide a detection element which, depending on its signal, can activate and/or deactivate the drive.

Drawings

The following description of preferred embodiments of the present invention is provided to illustrate the present invention in more detail with reference to the accompanying drawings. Wherein:

FIG. 1: a perspective view of a spraying device according to the invention designed as a spray gun;

FIG. 2: a simplified partial perspective view of the spray gun of fig. 1 with the housing open is shown;

FIG. 3: a cross-sectional view of the spray head of the spray device of figure 1 is shown;

FIG. 4: an enlarged view of detail a in figure 3;

FIG. 5: a diagram corresponding to fig. 3 is shown in a further preferred embodiment of the spraying device according to the invention;

FIG. 6: a schematic side view showing the fluid lines of a spraying device according to the invention;

FIG. 7: a perspective view of a further preferred embodiment of the spraying device according to the invention is shown;

FIG. 8: a simplified partial perspective view of the spray device of fig. 7 with the housing open;

FIG. 9: a cross-sectional view of the spray head of the spray device of figure 7 is shown;

FIG. 10: a cross-sectional view taken along line 10-10 of fig. 9;

FIG. 11: a cross-sectional view taken along line 11-11 of fig. 9;

FIG. 12: a schematic partial view of a preferred embodiment of a spraying device according to the invention is shown, in which details of the spray head and the drive means are shown;

FIG. 13: a diagram corresponding to fig. 12 is shown in a further preferred embodiment;

FIG. 14: a diagram corresponding to fig. 12 is shown in a further preferred embodiment;

FIG. 15: a diagram corresponding to fig. 2 in a further preferred embodiment of a spraying device according to the invention is shown, which comprises an adjusting element for providing different spraying patterns;

FIG. 16: a diagram corresponding to fig. 15 is shown, in which the adjusting element occupies a different position compared to fig. 15;

FIG. 17: a schematic view of a fluid line with a drive device of an advantageous embodiment of a spraying device according to the invention is shown;

FIG. 18: a view in the direction of arrow "18" in fig. 17 is shown;

FIG. 19: a perspective view of a further preferred embodiment of the spraying device according to the invention designed as a spray gun is shown;

FIG. 20: a diagram corresponding to fig. 19 is shown, in which the housing of the spraying device is partially open;

FIG. 21: a partial cross-sectional view of the spraying device of figure 19 is shown;

FIG. 22: partially as an exploded view showing an enlarged view of detail a in figure 20; and is

FIG. 23: an enlarged view of detail a in figure 20 is shown in cross-section.

Detailed Description

Fig. 1 shows an advantageous embodiment of a spraying device according to the invention, which is designated in its entirety by reference numeral 10, in a perspective view. The spraying device 10 is designed as a spray gun 12 which can be held by the hand of a user and can be operated manually. In the present case, the spraying device 10 comprises a handle arrangement with a handle element 14 which can be gripped by a user, the axis defined by the handle element 12 being oriented at an angle to the axis defined by the spray head 16, thereby giving the spray gun 12 its shape.

Currently, the angle between the handle member 12 and the spray head 16 is about 120 ° (which is based on the greater of the two angles resulting from the axes intersecting). Spray head 16 projects from handle member 14 in only one direction.

The spraying device according to the invention can be designed in different types, it not necessarily being a spray gun. For example, the spraying device according to the invention is designed as a watering bar. The watering bar may comprise a handle member and a spray head which are connected to one another via a tube or spout.

In general, the spraying device 10 has a housing 18 formed by the components of the handle member 14 and the spray head 16.

In the present case, the spraying device 10 comprises an inlet 20 at one end of the handle element 14, which is formed by a coupling element 22. The coupling element 22 is an engagement element of a plug adapter or a screw adapter and serves for coupling a conveying line, for example a hose line.

A fluid line 24, which is in fluid connection with the inlet 20 and extends up to the spray head 16, is arranged in the handle element 14. In the transition from the grip element 14 to the spray head 16, the fluid line 24 is currently bent, but this is not absolutely necessary.

Furthermore, the spray device 10 has a fluid line 26 in the spray head 16, which is formed separately from the fluid line 24. This is not absolutely necessary within the scope of the invention. In the spraying device according to the invention a coherent fluid line may be provided.

A valve element 28 is arranged in the fluid line 24, which valve element can be influenced by means of an actuating element 30 on the handle element 14. The actuating member 30 is a lever mechanically coupled to the valve member 28. This enables the user to selectively release or block the fluid line 24 (and thus the fluid line 26). Upon release of the fluid line 24, liquid may be sprayed by the spray device 10, which would not be possible upon blocking the fluid line 24.

In the spraying device 10, the actuating element 30 is articulated on the side of the handle element 14 remote from the spray head 16.

In the present case, the actuating element 30 is designed for finger actuation. In other types of advantageous embodiments, it can be provided that there is a palm actuation, wherein the actuating element 30 is arranged on the side of the grip element 14 facing the user. Alternatively or additionally, it is conceivable that the grip element 14 can be rotated relative to the spray head 16 about the axis of the grip element 14 in order to switch between finger manipulation on the one hand and palm manipulation on the other hand. Spraying devices of this type are described, for example, in WO 2016/146157 a 1.

The fluid line 24 and the fluid line 26 are connected to each other in a fluid-tight manner. To this end, the outlet 32 of the fluid line 24 is coupled with the inlet 34 of the fluid line 26. The inlet 34 is kept fixed in orientation by fixing the fluid line 24 on a retaining element which is currently formed by an intermediate wall 36 in the housing 18. In this way, movement of the sealing position between the fluid lines 24 and 26 can be avoided.

The fluid line 26 is designed to a large extent as a flexible hose line 38 and has an outlet 40 on the side opposite the inlet 34. At the outlet 40, the fluid line 26 includes a nozzle 42. In the present case, the nozzle 42 is designed to form a point-like jet, so that a point-like jet can be output by the spraying device 10. The axis defined by the nozzle 42 is aligned with the axis defined by the hose line 38 at the outlet 40 (fig. 4).

In order to fix the outlet 40 via the nozzle 42, a holding element 44 is assigned to the fluid line 26. The holding element 44 is fixed to the housing 18 and is designed, for example, in the form of a strip.

In the present case, the retaining element 44 forms a bearing element 46 which bears against the outlet 40, in particular the nozzle 42. Here, the nozzle 42 is "azimuthally fixed" in the sense that it maintains its position on the bearing element 46, but can be flipped relative to the support element by movement of the fluid line 26 (fig. 4). In particular, the bearing element 46 forms a bearing shell on which the nozzle 42 can roll. In particular, it is possible to move the axis of the nozzle 42 on the cone surface.

The bearing element 46 has a through-opening through which the jet issuing from the fluid line 26 can be discharged. On the front side, the spray head 16 comprises a cover element 48 closing the housing 18, which cover element is also provided with an opening 50 through which the liquid jet issues from the spraying device 10.

In the present case, the hose line 38 is dimensioned such that it is arranged laterally with play transversely to the direction of extension between the outlet 32 of the fluid line 24 and the bearing element 46. This facilitates the movement of the hose line 38, which is explained below, by means of the drive means 52 comprised by the spraying device 10.

In the spray device 10, the drive 52 is advantageously designed as an electric drive and has a drive motor 54, which is currently designed as a low-voltage motor. The drive motor 54 is housed in the housing 18 and is positioned laterally alongside the fluid line 26 relative to a central longitudinal plane of the spray device 10. The housing 18 is advantageously divided into two or more receiving spaces, wherein, in the present case, a receiving space 56 for the drive motor 54 and a receiving space 58 for the hose line 38 and further components of the drive 52 are provided. The receiving spaces 56 and 58 are separated from each other, for example, by an intermediate wall 36.

The separation of the receiving spaces 56 and 58 from each other facilitates a fluid-tight seal, so that liquids that may be in the receiving space 58 preferably do not penetrate into the receiving space 56.

For supplying the drive motor 54 with electrical energy, the spraying device has a preferably rechargeable battery 60. The battery 60 is arranged, for example, in the handle element 14. It can be provided that the battery 60 is removed from the housing 18 manually and in particular without tools. Alternatively or additionally, a coupling element, not shown in the figures, can be provided in order to charge the battery 60 in the housing 18.

An electric device 62 is associated with the drive 52, which electric device 62 is connected to the drive 52 and the battery 60. In the present case, the electrical device 62 is likewise accommodated in the grip element 14. Furthermore, the electrical device 62 comprises a trigger element 64 designed as a push button 66, wherein different designs are conceivable. The user is enabled to influence the electrical device 62 by actuating the push button 66, which is arranged on the side of the grip element 14 facing the user. In this case, the drive motor 54 is operated as soon as the push button 66 is actuated. Without this manipulation, the drive motor 54 is de-energized and does not operate.

It can be provided that an on/off function is triggered via the push button 66, wherein the drive motor 54 is started when the push button 66 is actuated and the drive motor 54 is switched off when the push button 66 is actuated again.

In particular, it is provided in the spray device 10 that the trigger element 64 for actuating the drive 52 is independent of whether the actuating element 30 is actuated. During operation of the spray device 10, during spraying of liquid from the spray device with release of the fluid line 24, the user can switch the drive means 52 on and off as required in order to move the hose line 38 continuously (as long as the drive means 52 is activated) and in a defined manner in order to change the orientation of the outlet 40.

To mechanically interface with the hose line 38 to move the hose line, the drive device 52 includes an eccentric body 68. In the present case, the eccentric body 68 is designed as a drive wheel 70 which is indirectly driven by the drive motor 54. The drive shaft 72 drives a drive wheel 74 which is fastened thereto and engages with the drive wheel 70. The drive wheels 70, 74 are currently designed as gears.

The axis of rotation defined by the drive wheel 70 about which the drive wheel 70 rotates is designated by reference numeral 76 in fig. 3.

In order to support the drive wheel 70, the spray device 10 in the present case comprises two support elements 78, the support elements 78 each comprising an annular section 80 with a through-opening and a retaining section 82, the support elements 78 each being fixedly secured to the housing 18 via the retaining sections 82.

The ring segment 80 bears axially against the opposite side of the drive wheel 70 relative to the axis of rotation 76. In this way, the drive wheel 70 is supported substantially along the outer edge flange-like on the support element 78. Here, the drive wheel 70 will slide along the ring-shaped section 80 during its rotation.

A receptacle in the form of a through-opening 84 is formed in the drive wheel 70 and is arranged eccentrically with respect to the axis of rotation 76. In fig. 3, reference numeral 86 designates an axis of the through opening 84.

The hose line 38 extends through the ring section 80 and through the through opening 84 such that the hose line 38 passes through the through opening 84 and then through the drive wheel 70.

Since the through-opening 84 is arranged eccentrically with respect to the axis of rotation 76 and the hose line 38 has play in the transverse direction, a bend is formed in the hose line 38 in the region of the through-opening 84 (fig. 3).

The axis of rotation 76 is advantageously aligned with the axis of the fluid line 24 in the region of the inlet 34, the outlet 32 and/or with the axis defined by the bearing element 46 (fig. 4).

The drive wheel 70 is capable of rotational movement relative to the hose line 38. In particular, the hose line 38 is not coupled to the drive wheel 70 in a rotationally fixed manner. For example, the hose line 38 slides directly or indirectly along the edge of the through opening 84. For this purpose, the hose line 38 is currently surrounded by a sleeve 88, the sleeve 88 sliding along the edge of the through-opening 84 when the drive wheel 70 is rotated.

If the user manipulates the drive device 52 with the push button 66, the drive shaft 72 rotates, thereby driving the drive wheel 70 to rotate about the rotational axis 76. The hose line 38 does not rotate, but due to the eccentric arrangement of the through-opening 84, so that as long as the drive motor 54 is in operation, it moves periodically and in a defined manner due to the deformation. The positioning of the bend of the hose line 38 in the region of the through-opening 84 is variable and executes a circular movement.

Due to the movement of the hose 38, the nozzle 42 rolls on the bearing element 46 in such a way that the nozzle axis assumes a conical curve. Thereby, the point-like jet emitted by the spraying device 10 also assumes a conical curve.

In this way, a high diversity of spraying devices 10 is made. As the point jet moves along the cone curve, a high area efficiency can be achieved in operation of the spray device 10. For example, if the spraying apparatus 10 is used for cleaning, high cleaning efficiency is obtained.

If no spot jet motion is required, the drive means 52 may be deactivated.

A typical rotational speed of the drive wheel 70 may be, for example, about 100 to 10,000 revolutions per minute.

The angle (opening angle of the cone) over which the nozzle 42 is swept during its rolling movement on the bearing element 46 may be, for example, approximately 1 ° to 20 °.

The spraying device 10 is set for low pressure ranges, for example for operation from about 0.5bar up to a maximum of 25bar (typically about 1bar to 8 bar). The volume flow of the liquid discharged may be, for example, about 50 liters to 3,500 liters per hour.

For example, a material with a hardness of approximately 15 shore a to 55 shore D has proven advantageous for the hose line 38.

A typical length of the hose line 38 is approximately in the centimeter range, the inner diameter may be, for example, approximately 0.5 to 30mm, and the wall thickness may be, for example, approximately 0.05 to 5 mm.

Further advantageous embodiments of the spraying device according to the invention will be discussed below. Only the greatest differences with respect to the spraying device 10 are explained here. The above embodiments made with reference to the spraying device 10 are correspondingly applicable to this further embodiment. Furthermore, the advantages that can be achieved with the spraying device 10 can also be achieved in the spraying device mentioned below, so that reference can be made to the above description to avoid repetitions.

The same reference numerals are used in particular for features and components of the same or of a spraying device 10 having the same function and of the spraying device mentioned below.

Fig. 5 shows a partial section through a spraying device which takes up the reference numeral 90 in a manner corresponding to fig. 3.

In contrast to the spraying device 10, no retaining element is provided for the outlet 40 of the fluid line 26. Instead, the spraying device 90 has no retaining element and the end of the outlet 40, in particular the nozzle 42, is freely movable.

When the hose line 38 is moved by means of the drive 52, the axis of the nozzle 42 and thus the emitted point-like jet assumes a conical curvature. The opening angle of the conical curve can be adapted, for example, by the degree of deflection of the drive wheel 70 and/or the length of the section of the hose line 38 which projects beyond the drive wheel 70 and comprises the outlet 40.

Fig. 6 shows a fluid line occupying reference numeral 92 of a spraying device according to the invention. The fluid line 92 may be used, for example, in the spray device 90 instead of the fluid line 26 thereof.

The fluid line 92 comprises two fluid line sections 94, 96, wherein the fluid line section 94 comprises the inlet 34 and the fluid line section 96 comprises the outlet 40, on which the nozzle 42 is arranged. The fluid line sections 94, 96 are formed rigidly.

The fluid line 92 includes a hinge member 98, which hinge member 98 hingedly connects the fluid line sections 94, 96 to one another. For this purpose, the hinge element 98 is made in particular of an elastically deformable material and is connected to the end sections of the fluid line portions 94, 96 in the manner of a collar or bellows. The fluid line portions 94, 96 can be moved relative to one another via a deformation section 100, which is formed, for example, by means of a constriction 102.

The drive device 52 acts via the drive wheel 70 preferably on a fluid line section 96 which is arranged downstream of the joint element 98 with respect to the direction of the flowing liquid. Fig. 6 shows, in conjunction with the dashed indication 104, for example, through openings 84 in which the drive wheels 70 can be arranged.

In a corresponding manner, the hinge element 98 is arranged preferably in front of the drive wheel 70 in the flow direction of the liquid. Fig. 5 shows the positioning of the hinge element 98 in combination with the dashed line indication 106.

Fig. 7 to 11 show an advantageous embodiment of a spraying device according to the invention, which takes the reference numeral 110.

In the spraying device 110, a flexible hose line 38 is also preferably used as the fluid line 26, but a rigid fluid line may be provided instead. The nozzle 42 is arranged at the outlet 40, wherein in the spraying device 110 the above-mentioned holding element 44 is designed to be movable to a certain extent in order to move the nozzle 42. This is explained below.

The drive device 52 comprises a drive motor 54, on the drive shaft 72 of which an eccentric 68 is fixed and which is driven so as to be rotatable about a rotational axis 76. In the present case, the axis of rotation 76 is the axis of rotation of the drive shaft 72.

Eccentric body 68 comprises an eccentric element 112 eccentrically with respect to rotational axis 76, eccentric element 112 being designed in the present case as a (for example pin-like) projection.

The eccentric 68 is a drive wheel in the spray device 110.

The drive device 52 includes an interface member 114. The connecting element 114 is mounted on the housing 18 in a pivotable manner in the receiving space 58. The pivot axis 116 preferably runs parallel to the rotational axis 76 and is arranged at a distance from the eccentric element 112.

The abutment member 114 engages the eccentric element 112. For this purpose, a receptacle 118 is formed on the connecting element 114 for the eccentric element 112, for example between two mutually spaced apart legs 120. As the eccentric body 68 rotates, the connecting elements 114 pivot back and forth about the pivot axis 116 as a result of the movement of the eccentric link 112 in the receptacle 118.

The interface element 114 comprises a through-opening 122, through which the hose line 38 with the outlet 40 and in particular the nozzle 42 at least partially passes. Furthermore, the drive device 52 comprises a pushing element 124. The pushing element 124 comprises an engagement opening 126, into which engagement opening 126 the hose line 38 engages with the outlet 40 and in particular the nozzle 42. It may also be provided through the opening 126.

The hose line 38 is mechanically connected to the connecting element 114 and/or the pushing element 124 and, for example, rests against an edge in at least one of the openings 122 or 126.

The thrust element 124 is assigned a guide 128 and is fixed to the housing 18 by means of a retaining section 130. The pushing element 124 can move along the guide 128. The direction of movement is indicated in the figure by the double arrow 132.

During operation of the drive 52, the adjacent elements 114 pivot about the pivot axis 116. In this way, the hose line 38 is loaded with force. However, since nozzle 42 is fixed to thrust element 124, nozzle 42 does not execute an oscillating movement, but rather executes a displacement movement in displacement direction 132.

If the drive motor 54 is activated, the hose line 38 is moved continuously and periodically and in a defined manner by mechanical interface with the drive device 52. Here, the positioning of the outlet 40, in particular the nozzle 42, is changed. The nozzle axes are offset in particular parallel by this movement. The point-like jet emitted by the spraying device 110 moves in this manner in a plane and imitates a flat jet. In this way, the area efficiency that can be achieved with the spraying device 110 can be greatly improved.

Fig. 12 schematically shows a partial view of a spraying device according to the invention and occupying reference numeral 140. Here, a section of the spray head 16 is shown.

In the spraying device 140, for example, a flexible or rigid fluid line 26 is provided.

The nozzle 42 is arranged at the outlet 40, wherein the nozzle axis 142 is oriented at an angle and in particular obliquely with respect to an axis 144 of the fluid line 26. The angle between the axes 142, 144, for example about 0.5 ° to 10 °, defines the opening angle of a cone on the curved surface of which the jets, and in particular the point-like jets, that can be emitted by the spraying device 140 extend.

The drive device 52 comprises a drive motor 54, the drive shaft 72 of which is mechanically connected to the fluid line 26 via a drive element 146. The drive element 146 is, for example, a transmission element 148, in particular a drive belt. Other types of drive elements 146 for transmitting a pulling force are also conceivable, such as ropes or chains.

The fluid line 26 can be rotated about an axis 144 by the drive device 52. As already mentioned, the point jet here exhibits a conical curvature.

In the spraying device 140, a sealing element 150 is also shown, which is designed, for example, as a slide ring seal. Additionally, fig. 12 shows a bearing arrangement 152, for example with ball bearings, for supporting the rotating fluid line 26. It is to be understood that other types of advantageous embodiments of the spray device according to the invention with a rotating fluid line 26 may also have, in particular, a sealing element 150 and a bearing arrangement 152.

Fig. 13 shows, in a manner corresponding to fig. 12, an advantageous embodiment of a spraying device according to the invention, which takes up reference numeral 160.

In the spray device 160, the fluid line 26 is also driven in rotation. The drive device 52 is shown by way of example and has a drive element 148 on the side remote from the outlet 40.

The axis of the nozzle 42 is, for example, aligned with the axis 144 of the fluid line.

The outlet 40, in particular the nozzle 42, is in particular freely movable. An unbalance element 162 is provided, which is preferably arranged at the outlet 40. For example, for this purpose, the fluid line 26 has an eccentrically arranged counterweight on one side.

When the fluid line 26 rotates, the imbalance element 162 causes a targeted imbalance, as a result of which, in particular, the orientation of the outlet 40 is changed in such a way that the emitted jet, in particular a point-shaped jet, assumes a conical curvature.

Fig. 14 shows an advantageous embodiment of a spraying device according to the invention in partial view, with reference numeral 170, wherein a part of the spray head is shown in fig. 12 and 13.

In the spray device 170, the drive motor 54 is arranged axially behind a fluid line 172, which is used instead of the fluid line 26. Fluid line 172 has a bypass section 174 with inlet 34 and an outlet section 176 in flow connection therewith, bypass section 174 being arranged at an angle with respect to outlet section 176. The extension of the outlet section 176 beyond the branch section 174 forms a protruding section 178.

The fluid line 172 is designed as a flexible hose line and engages with a protruding section 178 into the eccentric body 68. For this purpose, the eccentric body 68 forms an opening 180, which is designed, for example, as a blind hole. The axis of the fluid line 172 is aligned with the axis 182 of the eccentric 68.

The eccentric body 68 is connected to the drive motor 54 via a drive shaft 72. The axis of rotation 184 of the drive shaft 72 is spaced from the axis 182 such that the eccentric body 68 is held eccentrically on the drive shaft 72 relative to the axis of rotation 184.

Alternatively, it can be provided that the eccentric body 68 is oriented coaxially with the drive shaft 72, wherein the opening 180 with the axis 182 is formed eccentrically with respect to the axis of rotation 76 in the eccentric body 68.

In the spraying device 170, the outlet 40, in particular the nozzle 42, is fixed to the housing 18 via the retaining element 44. If the drive 52 is in operation, the eccentric body 68 rotates, as a result of the eccentric orientation of the opening 180 relative to the axis of rotation 84, so that the fluid line 172 executes a movement in a laterally deflected manner. This results in a change in the orientation of the outlet 40, and in particular the nozzle 42.

In a variant of the spray device 170, which is shown in dashed lines in fig. 14, it can be provided that the outlet 40 is not fixed in the housing 18. The free end of the fluid line 172 is arranged in the schematically shown opening 50 of the cover element 48.

Fig. 15 and 16 show an advantageous embodiment of a spraying device according to the invention, which takes over the reference numeral 190. The spray device 190 is based on the spray device 10 and comprises in contrast thereto an adjusting element 192 with which different spray patterns of the liquid jet to be emitted can be generated. It is to be understood that such an adjusting element may be present even in all of the spraying devices disclosed herein.

The adjusting element 192 is arranged upstream of the cover element 48 and is held, for example, on the housing 18 in a movable manner, wherein the adjusting element 192 is mounted on the housing 18 in a pivotable manner. An actuating element 194 is provided, with which the adjusting element 192 can be pivoted manually by a user relative to the housing 18.

The adjustment member 192 includes a plurality of spray pattern openings 196 that can be aligned with the openings 50 and the outlet 40 (not shown). However, it can be provided that the cover element 48 with the opening 50 is omitted and the adjusting element 192 is arranged in the receiving space 58.

For example, a first spray pattern opening 196 is provided in order to spread the point-like jet of the outlet 40 and in this way produce a rain-like spray.

The further spray pattern openings 198 are dimensioned such that a given point-like jet is not affected. The spray pattern opening 198 is adjusted when the point-like jet is to be moved in a cone-like shape as explained above.

In addition, further through openings 200 are provided, which produce a narrow, point-like jet with high intensity.

The spray pattern openings 196 and 200 are used when the drive 52 is not currently set to be activated.

Advantageously, the position of the actuating element 192 can be detected mechanically and/or electrically, for example by means of a detection element. If the adjustment member 192 occupies a position such that one of the spray pattern openings 196, 200 is aligned with either the opening 50 or the outlet 40, the drive device 52 may be deactivated. Conversely, operation of the drive 52 may be maintained or enabled, for example, when the spray pattern openings 198 are aligned with the openings 50 or the outlets 40.

In the advantageous embodiment of the spraying device according to the invention described so far, the drive is mechanically connected to the fluid line. Alternatively or additionally, other types of interfaces, for example electrical, electromagnetic or magnetic interfaces, may be provided. Examples of magnetic interfacing are schematically shown in fig. 17 and 18.

The drive device 52 comprises, for example, a drive motor 54 for driving the drive shaft 72 for rotation about a rotation axis 76. The drive wheel 202 is held on the drive shaft 72, for example.

A further drive wheel 204 of the drive device 52 is associated with the drive wheel 202. In the present case, the drive wheel 204 is oriented coaxially with the fluid line, which is designed in particular as a hose line 38. The drive wheel 204 is rotated about the hose line 38 by the rotation of the drive shaft 72. The drive wheel 204 is rotatably supported in the housing 18, for example (not shown in the figures).

The drive wheels 202, 204 are designed as toothed wheels, for example.

In order to magnetically connect the drive 52 to the hose line 38, two magnetic elements 206, 208 are provided. In the present case, the magnetic element 206 is fixed to the drive wheel 204 and can rotate together with it about the axis of the hose line 38. The magnetic element 208 is fixed to the hose line 38. The magnetic elements 206, 208 may be permanent magnets or electromagnets.

The relative arrangement of the magnetic elements 206, 208 is such as to attract each other in their approximate state (fig. 17 and 18). In the closed state, the magnetic element 208 is pulled in the direction of the magnetic element 206, as a result of which the hose line 38 is deflected continuously, periodically and in a defined manner as long as the drive 52 is in operation. Alternatively, it can be provided that the magnetic elements 206, 208 repel one another in their closed state. This also results in the hose line 38 being deflected continuously, periodically and in a defined manner.

It should be appreciated that multiple magnetic elements may be disposed on the drive wheel 204 and/or the fluid line 26.

An advantageous embodiment of a spraying device according to the invention shown in fig. 19 to 23 and designated by reference numeral 220 is discussed below. Even in this case, the main differences compared to the spraying device 10 will be mainly discussed. The above embodiments are correspondingly applicable to the spraying device 220, and the advantages mentioned in connection with the spraying device 10 can also be achieved with the spraying device 220. Reference is made to the above embodiments.

The spraying device 220 differs from the spraying device 10 in that the spray head 16 comprises two sections 222, 224 which are opposite one another with respect to an axis 226 of the handle element 14 (fig. 21). In the present case, the axis 226 is defined by the fluid line 26. The handle element 14 thus projects from a spray head 16 which projects in both directions beyond an imaginary extension of the handle element 14.

When the spray apparatus 220 is used as intended, the section 222 is away from the user and the section 224 is towards the user.

The section 222 accommodates the drive device 52, in particular its drive motor 54 and eccentric 68. In addition, section 222 houses fluid line 26.

The section 224 in particular accommodates at least one battery, two batteries 60 being provided in the present case.

The angle between handle member 14 and spray head 16 is approximately 110 deg., measured as the greater of the two angles between axis 226 and axis 228 of fluid line 26 at inlet 34. The axis 228 coincides with the axis of rotation 76 of the eccentric body 68 (fig. 21). The two axes 226, 228 approximately intersect in the region of the inlet 34, in which the fluid lines 24, 26 are connected to one another in a fluid-tight manner.

Advantageously, the drive means 52 and the battery 60 are arranged on opposite sides with respect to the axis 226. This has proven to be advantageous for use, since the weight of the spray head 16 is more evenly distributed relative to the handle member 14 and the hand-held weight of the spraying device 220 is made to feel relatively small.

Housing 18 has a cover member 230 on the side of spray head 16 remote from outlet 40 and facing the user. The cover element 230 can be removed from the housing 18, preferably manually and without tools, by a user in order to remove the battery 60 from the housing 18 and place it therein.

The battery 60 is disposed in the accommodating space 56 together with the driving motor 54. Even in the spraying device 220, the receiving spaces 56, 58 are sealed against one another in order to prevent liquid from penetrating into the receiving space 56.

The receiving space 58 can be sealed off from the receiving space 232, for example in the region of the inlet 34. To this end, for example, the retaining element 234 may seal between the intermediate wall 36 and the bottom wall 236 of the housing. The retaining element 234 may be a shock absorber to dampen vibrations acting on the housing 18. The fluid line 24 and a part of the electrical device 62 shaped as a switching element 238 are arranged in the receiving space 232.

As can be gathered in particular from fig. 22 and 23, the eccentric body 68 comprises a plurality of elements in the spraying device 220. In particular, the eccentric body 68 is designed in two parts and has a drive wheel 70 and a cover element 240. An intermediate element 242 is also provided. However, two or all three of these elements may be integrally formed with each other.

The drive wheel 70 is connected to a drive wheel 74 of the drive shaft 72 and can be driven so as to be rotatable about a rotational axis 76. A receptacle shaped as a through opening is formed in the drive wheel 70. The fluid line 26, which is designed to a large extent as a hose line 38, passes through the through-opening 84.

The cover element 240 is formed with a retaining element 244 (fig. 23) which is movable and in particular rotatable relative to the housing 18 for the outlet 40, in particular for the nozzle 42. For this purpose, a receptacle shaped as an engagement opening 246 is formed on the cover element 240, which receptacle has a convex edge 248. The engagement opening 246 is arranged eccentrically with respect to the axis of rotation 76, the axis of which is designated by reference numeral 250. The axis 250 is spaced further from the axis of rotation 76 than the axis 86 of the through-opening 84. This has proven to be advantageous for the orientation of the hose line 38 relative to the eccentric body 68.

The cover element 240 closes the opening 254 of the housing 18 with the cover section 252. The engagement opening 246 has an opening 50 in the cover section 252, through which a liquid jet can issue.

The cover element 240 is connected in the present case by locking against relative rotation with the drive wheel 70. On the cover element 240, a locking hook 256 is arranged, which passes through the drive wheel 70 and locks with it. The support element 257 extends from the cover section 252 in the direction of the drive wheel 70 and bears against the latter. Thereby clearly defining the spacing between the drive wheel 70 and the cover element 240.

When the drive device 52 is actuated, the drive wheel 70 rotates together with the cover element 240 about the axis of rotation 76. Nozzle 42 rests on edge 248. Due to the rotation about the axis of rotation, the fluid line 26 is moved continuously and in a defined manner, so that the emitted liquid jet assumes a conical curve. In this case, the fluid line 26 itself does not rotate because of the fixed-orientation inlet 34. Only the hose line 38 is deformed.

With respect to the spray device 10, the design of the spray device 220 has proven to be advantageous because of the lower energy required to deform the hose line 38.

The intermediate element 242 is arranged between the drive wheel 70 and the cover element 240. In the present case, the intermediate element 242 is designed as a ring 258, which is positioned coaxially with the drive wheel 70 and the cover element 240 relative to the axis of rotation 76.

The drive wheel 70 is now connected with the intermediate element 242 by locking. The locking hook 260 of the drive wheel 70 passes through the opening 262 of the loop 258 and locks with the loop.

Via the intermediate element 242, the eccentric body 68 is supported in the radial and axial direction relative to the housing 18 on the basis of the axis of rotation 76 and is guided via a guide 264. The intermediate element 242 comprises an engagement element arranged on the ring 258 and arranged inside the housing 18. In the present case, the engagement elements are designed as ribs 266 which project radially from the ring 258, wherein there are two sets of axially spaced ribs 266. Engagement elements shaped as radially projecting ribs 268 of the housing 18 engage in the resulting groove. One set of ribs 266 of ring 258 engages in grooves between axially spaced ribs 268 of housing 18 (fig. 23). The ring 258 is thus held on the housing 18 in a rotationally fixed manner and is fixed axially and radially.

By means of the guide 264 of the eccentric 68, the rotation of the eccentric is clearly defined when the drive motor 54 is activated. This ensures a clearly defined movement of the nozzle 42 for outputting a spatially variable point jet.

In the spray device 220, the actuating element 30 forms the trigger element 64. In the present case, actuating element 30 is an actuating lever, which is articulated on housing 18 in the transition region from grip element 14 to spray head 16 (fig. 20 and 21).

The actuating element 30 is designed in two stages. When pulled by a user, valve element 28 is first moved via actuator 270 to enable liquid to flow through fluid line 24 and thus release delivery to fluid line 26.

On further pulling, the actuating element 30 is pivoted further relative to the housing 18. This causes the trigger element 272 to actuate the switching element 238. The triggering element 272 projects from the actuating section of the actuating element 30 into the receiving space 232 and pivots together with the actuating section.

If the trigger element 272 contacts the switch element 238, the drive motor 54 is activated.

The two-stage actuation of the actuating element 30 is communicated to the user via haptic feedback. The tactile element 274, in the present case a hook 276 arranged on the fluid line 24, meets a corresponding receptacle 278. If the valve element 28 is first opened, the tactile element 274 engages in the receptacle 278 and can be felt by the user. Upon further pulling for manipulating the switch element 238, the user will get further tactile feedback when the tactile element 274 slides out of the receptacle 278. Thus, it is tactile for the user to detect when the valve element 28 is open and when to activate the drive motor 54.

If the user releases the force, the actuating element 30 is pivoted relative to the housing 18 by the resetting device 280. In this case, the actuation of the switching element 238 is first of all cancelled, the fluid line 24 still being open. As the force of the user continues to decrease, the valve element 28 closes the fluid line 24 and the actuating element 30 assumes an initial position in which neither liquid nor the drive motor 54 is ejected.

In the present case, the return means 280 comprise a return spring 282 acting on the actuator 270.

List of reference numerals

10. 90, 110, 140, 160, 170, spray device

190、220

12 spray gun

14 handle element

16 spray head

18 casing

20 inlet

22 coupling element

24 fluid circuit

26 fluid circuit

28 valve element

30 operating element

32 outlet

34 inlet

36 intermediate wall

38 hose line

40 outlet port

42 nozzle

44 holding element

46 bearing element

48 cover element

50 opening

52 drive device

54 drive motor

56 accommodation space

58 receiving space

60 cell

62 electric device

64 triggering element

66 push buttons

68 eccentric body

70 driving wheel

72 drive shaft

74 driving wheel

76 axis of rotation

78 support element

80 annular segment

82 holding section

84 through opening

86 axis

88 casing tube

92 fluid circuit

94 fluid line section

96 fluid line segment

98 hinge element

100 deformation zone

102 constricted portion

104 identification part

106 mark part

112 eccentric link

114 contact element

116 axis of oscillation

118 accommodating part

120 side edge

122 through opening

124 pushing element

126 scarf opening

128 guide part

130 holding section

132 direction of movement

142 nozzle axis

144 axis of rotation

146 drive element

148 drive element

150 sealing element

152 bearing device

162 deflecting element

172 fluid line

174 leg segment

176 output section

178 convex section

180 opening

182 axis

184 axis of rotation

192 regulating element

194 actuating element

196 spray pattern openings

198 spray pattern openings

200 spray pattern openings

202 driving wheel

204 driving wheel

206 magnetic element

208 magnetic element

220 spraying device

Section 222

224 section

226 axis line

228 axis line

230 cover element

232 space for containing

234 holding element

236 bottom wall

238 switching element

240 cover element

242 intermediate element

244 holding element

246 scarf opening

248 edge

250 axis line

252 cap section

254 open

256 locking hook

257 support element

258 ring

260 locking hook

262 opening

264 guide part

266 Ribs

268 Rib

270 actuator

272 trigger element

274 tactile element

276 hook

278 accommodation part

280 reset device

282 return spring

Claims (41)

1. Spraying device for spraying liquids, in particular in the low pressure range,

the spraying device (10; 90; 110; 140; 160; 170; 190; 220) is designed to be hand-held and manually operable, comprising:

a spray head (16) and a handle element (14),

a fluid line (26; 92; 172) having an inlet (34) for delivering the liquid and an outlet (40) arranged on the spray head (16) for spraying the liquid,

an actuating element (30) for influencing a valve element (28) via which the passage of liquid through the fluid line (26; 92; 172) can be selectively released or blocked,

preferably an electric drive device (52) having a drive motor (54) which is connected to the fluid line (26; 92; 172), wherein the fluid line (26; 92; 172) can be moved continuously in a defined manner via the drive device (52) for changing the position and/or orientation of the outlet (40).

2. A spraying device as claimed in claim 1, characterized in that the drive means (52) are mechanically and/or magnetically interfaced with the fluid line (26; 92; 172).

3. A spraying device according to claim 1 or 2, characterized in that the fluid line (26; 92; 172) comprises or forms a nozzle (42) at the outlet (40), or the outlet (40) is formed by a nozzle (42).

4. A spraying device according to any one of the preceding claims, characterized in that the exit direction of the liquid through the nozzle (42) extends along the axis of the fluid line (26) or is oriented obliquely thereto.

5. A spraying device according to any one of the preceding claims, characterized in that the outlet (40) is configured for outputting a point-like jet.

6. A spraying device as claimed in any one of the preceding claims, characterized in that the outlet (40) is movable in such a way that the jet of the spraying device (10; 90; 110; 140; 160; 170; 190; 220) exhibits a conical curvature.

7. A spraying device as claimed in any one of the preceding claims, characterized in that the outlet (40) is movable in such a way that the jet of the spraying device (10; 90; 110; 140; 160; 170; 190; 220) can be output in one plane.

8. Spraying device according to one of the preceding claims, characterized in that the spraying device (10; 90; 110; 140; 160; 170; 190; 220) comprises a retaining element (44; 244) against which the outlet (40), in particular the nozzle (42), bears and/or is fixed, in particular the retaining element (44) comprises or constitutes a bearing housing on which the outlet (40) rolls.

9. A spraying device as claimed in claim 8, characterized in that the holding element (244) is arranged movably on the housing (18) of the spraying device (10; 90; 110; 140; 160; 170; 190; 220) by means of a drive (52) or the holding element (44) is arranged non-movably on the housing (18).

10. A spraying device as claimed in any one of the preceding claims, characterized in that the outlet (40) is not fixed by means of a holding element (44; 244) but is freely movable.

11. A spraying device according to any one of the preceding claims, characterized in that the drive means (52) interface with the outlet (40), in particular the nozzle (42), and act on the fluid line (26; 92; 172) at or near the outlet (40).

12. A spraying device as claimed in any one of the preceding claims, characterized in that the drive means (52) adjoin the fluid line (26; 92; 172) at a distance from the outlet opening (40) in the inflow direction of the liquid to be sprayed before the outlet opening.

13. Spraying device according to one of the preceding claims, characterized in that the fluid line (26; 92; 172) is held azimuthally fixed on the spraying device (10; 90; 110; 140; 160; 170; 190; 220) at the inlet (34).

14. Spraying device according to one of the preceding claims, characterized in that the fluid line (26; 92; 172) is at least in sections designed as a flexible hose line (38) or comprises a flexible hose line (38).

15. Spraying device according to one of the preceding claims, characterized in that the fluid line (26; 92; 172) is designed to be rigid at least in sections.

16. Spraying device according to one of the preceding claims, characterized in that the fluid line (92) comprises two, preferably rigid, fluid line sections (94, 96) which are movably connected to one another and can be tilted relative to one another by means of a hinge element (98), wherein the drive means (52) adjoins one of the fluid line sections (94, 96).

17. Spraying device according to any one of the preceding claims, characterized in that the spraying device (10; 90; 110; 140; 160; 170; 190; 220) comprises at least one battery (60), preferably rechargeable, for supplying energy to the drive means (52).

18. A spraying device according to claim 17, characterized in that the at least one battery (60) is accommodated in a housing (18) of the spraying device (10; 90; 110; 140; 160; 170; 190; 220) in a spray head (16) or in a handle element (14).

19. A spraying device according to any one of the preceding claims, characterized in that the drive motor (54) is accommodated laterally alongside the fluid line (26) in a housing (18) of the spraying device (10; 90; 110; 140; 160; 170; 190; 220).

20. Spraying device according to one of claims 1 to 18, characterized in that the drive motor (54) is disposed axially in front of the fluid line (26) with respect to the flow direction of the liquid to be sprayed.

21. A spraying device according to any one of the preceding claims, characterized in that the drive means (52) can be selectively switched on and off by a user, and that the spraying device (10; 90; 110; 140; 160; 170; 190; 220) comprises a trigger element (64) for activating the drive means (52).

22. A spraying device as claimed in claim 21, characterized in that the actuating element (30) forms the trigger element (64), or the trigger element (64) can be actuated independently of the actuating element (30).

23. A spraying device as claimed in claim 22, characterized in that the operating element (30) can be operated in two stages and, on operation, firstly releases the passage of the liquid and, on further operation, activates the drive means (52).

24. Spraying device according to any one of the preceding claims, characterized in that the drive means (52), in particular the drive motor (54), are accommodated in the spray head (16).

25. Spraying device according to any one of the preceding claims, characterized in that the spraying device (10; 90; 110; 140; 160; 170; 190; 220) comprises a spray gun (12) or a lance or is designed as such.

26. Spraying device according to one of the preceding claims, characterized in that the drive means (52) comprise an eccentric body (68) which is rotatably driven about a rotation axis (76), preferably provided with a guide (264) for rotating the eccentric body (68) relative to the housing (18) of the spraying device (10; 90; 110; 140; 160; 170; 190; 220).

27. Sprinkling apparatus according to claim 26, wherein the eccentric (68) is designed in one piece or comprises two or more elements connected to each other and cooperating.

28. Spraying device according to claim 26 or 27, characterized in that the eccentric body (68) comprises or is configured with a drive wheel (70) and a receptacle (84) arranged eccentrically with respect to the rotational axis (76), or with a drive wheel with a receptacle arranged eccentrically with respect to the rotational axis, wherein the fluid line (26) is embedded into the receptacle (84) configured to engage the opening (246) and/or passes through the receptacle configured as a through opening (84).

29. A spraying device according to any one of claims 26 to 28, characterized in that the eccentric (68) comprises or is formed with a cover element (240) which closes an opening (254) of a housing (18) of the spraying device (10; 90; 110; 140; 160; 170; 190; 220) and has an exit opening for a liquid jet issuing from an outlet (40), preferably the cover element (240) is connected with the drive wheel (70).

30. Spraying device according to claim 28 or 29, characterized in that the drive wheel (70) and/or the cover element (240) are designed to be rotationally movable relative to the fluid line (26), wherein the fluid line (26) in particular directly or indirectly contacts an edge of a receptacle of the drive wheel (70) or of the cover element (240).

31. Spraying device according to one of claims 28 to 30, characterized in that an intermediate element (242) arranged between the drive wheel (70) and the cover element (240) is provided on an eccentric (68), via which the eccentric (68) is axially and/or radially supported on a housing (18) of the spraying apparatus (10; 90; 110; 140; 160; 170; 190; 220), in particular the intermediate element (242) is configured as a guide (264) or as a bearing for the eccentric (68) on the housing (18).

32. Spraying device according to one of claims 28 to 31, characterized in that the drive wheel (70) bears axially on both sides slidingly on a support element (78) which is fixedly secured to a housing (18) of the spraying device (10; 90; 110; 140; 160; 170; 190; 220).

33. Spraying device according to claim 26 or 27, characterized in that the eccentric body (68) comprises an eccentric element (112) arranged eccentrically with respect to the axis of rotation (76), which engages with an interface element (114) which is mounted pivotably on the spraying device (10; 90; 110; 140; 160; 170; 190; 220), on which the fluid line (26) is held directly or indirectly.

34. Spraying device according to claim 33, characterized in that the interface element is connected to a pushing element (124) which is movably supported on the spraying device (10; 90; 110; 140; 160; 170; 190; 220), wherein preferably a guide (128) for the pushing element (124) is provided in a housing (18) of the spraying device (10; 90; 110; 140; 160; 170; 190; 220).

35. Spraying device according to claim 33 or 34, characterized in that the interface element (114) and/or the pushing element (124) comprise an opening (122, 126), wherein the fluid line (26; 92; 172) is embedded in the opening (122, 126) or passes through the opening (122, 126).

36. A spraying device as claimed in any one of the preceding claims, characterized in that the drive means (52) comprise or are formed with a drive element (146) via which the fluid line (26; 92; 172) can be rotated about its axis (86).

37. A spraying device according to claim 36, characterized in that an unbalance element (162) for providing unbalance is arranged on the fluid line (26; 92; 172), in particular on the outlet (40).

38. A spraying device according to any one of the preceding claims, characterized in that the drive means (52) comprise or are formed with a vibrating element which is mechanically connected with the fluid line (26; 92; 172).

39. A spraying device according to any one of the preceding claims, characterized in that the spraying device (10; 90; 110; 140; 160; 170; 190; 220) comprises at the outlet (40) an adjusting element (192) having two or more optional spray pattern openings (196, 198, 200) that can be brought into alignment with the outlet (40) for constituting different spray patterns with the spraying device (10; 90; 110; 140; 160; 170; 190; 220).

40. A spraying device as claimed in claim 39, characterised in that the adjustment element (192) is manually adjustable.

41. A spraying device as claimed in claim 39 or 40, characterised in that the drive means (52) can be activated and/or deactivated depending on the position of the adjustment element (192).

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