EP3977494B1 - Switch for a hand power tool - Google Patents

Description

The invention relates to a switch for a hand-held power tool or as a component of a hand-held power tool, which has an electric drive motor that can be switched by the switch, according to the preamble of claim 1.

Such a switch is in EP 3 101 670 A2 described.

A switch according to EP 2 395 527 A1 has a magnetic sensor as a switching actuator, which is accommodated in a switch chamber of the switch housing. By pressing the actuating element, the switching actuator can be moved in order to switch on the drive motor and change its speed.

To adjust the respective direction of rotation of the drive motor, for example for screwing in and unscrewing screws, a separate switching element is provided, which also works magnetically. However, the magnetic switching actuator of the direction of rotation switch tends to attract ferromagnetic dust, chips and the like, so that the hand-held machine tool can no longer be used.

It is therefore the object of the present invention to provide an improved switch for a hand-held power tool and a hand-held power tool equipped therewith.

To solve the problem, a switch according to the technical teaching of claim 1 is provided.

The pivot bearing makes it easy, for example, to design the switch as a direction of rotation switch, i.e. the direction of rotation of the drive motor can be specified by adjusting the switching actuator, for example clockwise or anti-clockwise rotation of a tool holder of the hand-held machine tool.

For example, the pivot bearing is designed as a plain bearing. However, the pivot bearing can also comprise a rolling bearing, for example a ball bearing or roller bearing.

Preferably, the pivot bearing is a component of the passage opening or a component of the wall on which the passage opening is arranged. For example, the passage opening itself is designed as a bearing receptacle for the actuating element.

The pivot bearing or a pivot bearing that supports the actuating element around its axis of rotation can also be arranged directly next to the passage opening. For example, the pivot bearing can comprise a roller bearing or plain bearing, which is designed as a pivot bearing separate from the wall on which the passage opening is arranged or as a separate component. In this design, the passage opening itself cannot, for example, be designed as a pivot bearing for the actuating element. Nevertheless, it is also advantageous in this scenario if the actuating element penetrates the passage opening but is sealed at the passage opening.

It is preferred that the rotation axis passes through the wall on which the rotary bearing is arranged. For example, the rotation axis runs parallel to a side wall surface of the wall, i.e. that the rotary bearing is arranged directly in the wall, but has a rotation axis that is, for example, parallel to the wall of the switch housing and runs in the wall.

However, a preferred concept provides that the axis of rotation is at an angle, in particular at a right angle, to a wall surface of the wall on which the pivot bearing is arranged. However, it is also possible for the axis of rotation to be at an oblique angle, i.e. not at a right angle, to the wall surface. For example, the transmission element is designed as a shaft element or has a shaft section that is rotatably mounted in the pivot bearing about the axis of rotation that passes through the wall surface at an angle.

A preferred concept provides that the switch chamber is closed with the exception of the through-opening in which the rotary bearing is accommodated or which forms the rotary bearing. The transmission element therefore closes the through-opening or is sealingly accommodated in the through-opening. The switch chamber tightly encloses the switching actuator so that environmental influences, for example dust, in particular ferromagnetic dust, cannot penetrate into the switch housing and/or into the switch chamber in which the switching actuator is arranged.

Preferably, anti-displacement contours or an anti-displacement device are provided on the passage opening to hold the transmission element in a non-displaceable manner parallel to its axis of rotation or along the axis of rotation. The transmission element is therefore preferably held in a non-displaceable manner with respect to its axis of rotation at the passage opening. The anti-displacement device or anti-displacement contours comprise, for example, an arrangement of interlocking form-fitting contours, with one form-fitting contour being arranged on the transmission element and the other form-fitting contour being arranged on the passage opening or the wall of the switch housing with the passage opening. The form-fitting contours preferably enable the transmission element to be rotated. about its axis of rotation and/or support the transmission element about its axis of rotation and/or form part of the pivot bearing arranged at the passage opening.

The anti-displacement contours comprise, for example, a ring flange that extends partially or completely in a ring shape around the axis of rotation and that engages in a partially or completely in a ring shape ring groove. The ring flange can be arranged on the transmission element, the ring groove on the passage opening. However, it is also possible, conversely, for the ring flange to be arranged on the passage opening, i.e., for example, protrudes radially inward into the passage opening, while the ring groove is arranged on the transmission element. It is understood that the ring flange can comprise two or more partially annular ring flange sections, between which angular distances are provided with respect to the axis of rotation. It is also understood that at least two pairs of ring flange and ring groove can be provided at an axial distance with respect to the axis of rotation of the transmission element, each of which engages with one another. The ring flange is, for example, disk-shaped. The ring flange and/or the ring groove are preferably integral with the transmission element.

The ring flange and the ring groove can, for example, be components of the seal explained below. In particular, the ring flange and the ring groove advantageously form a component of a labyrinth seal. However, it is also possible that the ring flange and the ring groove do not have a sealing function, for example if they are only partially ring-shaped.

A seal is preferably arranged on the passage opening and/or on the rotary bearing. It is preferred if the rotary bearing and/or the passage opening is designed as a seal or has a seal. For example, components of a labyrinth seal can simultaneously be components of the rotary bearing or the passage opening. Preferably, components complementary to the seal, for example also components of a labyrinth seal, are arranged on the transmission element.

The seal can, for example, be a sliding seal in the manner of a plain bearing, comprise an O-ring or the like.

It is preferred if the seal surrounds the transmission element in a ring shape. For example, it is advantageous if the seal comprises a sealing flange that engages in an annular sealing receptacle. The sealing flange is arranged, for example, on the transmission element, while the annular sealing receptacle is arranged on a bearing receptacle of the rotary bearing. However, it is also possible for the rotary bearing to have an annular sealing flange that protrudes radially inwards towards the transmission element and engages in an annular sealing receptacle on the transmission element. An O-ring is also suitable as a sealing flange. In particular, it is possible for an O-ring or another rubber seal or elastic seal to be arranged on a sealing flange.

It is preferred if the seal comprises a labyrinth seal or is formed by one. For example, the aforementioned sealing flange can be designed in the manner of a labyrinth seal. It is preferred if only a labyrinth seal and no elastic seal is provided between the transmission element and the passage opening. The labyrinth seal can simultaneously form a plain bearing or form a component of a plain bearing. This makes it possible, for example, to achieve low wear when the transmission element rotates in the rotary bearing or plain bearing.

The actuating element, which drives or actuates the rotatable transmission element, is preferably mounted on a sliding bearing in a translational manner with respect to the switch housing. The sliding bearing can be a component of the switch housing or can be arranged on the switch housing. It is preferred if the sliding bearing is provided on the machine housing of the hand-held power tool.

Between the switch and the actuating element, in particular between the transmission element and the actuating element, there is preferably a Transmission gear arranged. Of course, it is possible that a transmission gear is arranged, for example, between the transmission element and the switching actuator.

The transmission gear can be arranged entirely or partially within the switch housing, in particular within the switch chamber. Preferably, however, the transmission gear is arranged entirely or completely outside the switch housing. Thus, for example, only a section of the transmission element and the switching actuator are arranged within the switch housing or the switch chamber.

The transmission gear is preferably designed or provided for translating a linear movement or translational movement of the actuating element into a rotational movement of the switching actuator. Such a translation can be achieved, for example, using a wedge gear or inclined surface gear. A toothed gear, in particular a combination of rack and gear, can also perform the aforementioned function. For example, a rack or rack section is arranged on the actuating element, which meshes with a gear or a circumferential toothing on the transmission element. A particularly preferred embodiment, which is shown in the drawing, provides that the transmission gear comprises a crank gear or is formed by it.

The transmission gear preferably has a drive section coupled to the actuating element and/or driven by the actuating element, as well as an output section that drives the switching actuator or carries the switching actuator. The drive section and/or the output section are preferably arranged on the transmission element. In particular, the transmission element has the drive section and the output section in one piece.

It is advantageous if the transmission element is designed as a crankshaft element or a crankshaft or is rotationally connected or firmly coupled to a crankshaft. For example, the transmission element has a Shaft section which is rotatably mounted on the passage opening of the switch housing. A crank arm protrudes at an angle, in particular at a right angle, from the shaft section. An actuating arm in turn advantageously protrudes at an angle, in particular at a right angle, from the crank arm. The shaft section and the actuating arm preferably run parallel to one another or have longitudinal extensions that run parallel to one another. The shaft section, the crank arm and the actuating arm form, for example, a stepped contour or run stepped in a side view. It is preferred if only the shaft section engages in the switch housing and/or penetrates the passage opening. The shaft section protrudes from the passage opening on opposite sides, for example. It is also advantageous if at least one seal for sealing the shaft section on the switch housing and/or one of the anti-slip contours and/or at least one of the annular grooves or annular flanges for engaging in another of the annular grooves or annular flanges on the switch housing, in particular on the passage opening, are arranged on the shaft section.

It is advantageous if the transmission element has a shaft section that protrudes freely in front of the wall or side wall of the switch housing having the passage opening into a switch chamber of the switch housing delimited by the wall or side wall. The aforementioned seal and/or one of the anti-displacement contours and/or an annular flange extending partially or completely annularly around the axis of rotation and/or a partially or completely annular annular groove are advantageously arranged on the shaft section. The at least one partially or completely annular annular flange of the shaft section engages in an annular groove on the passage opening, while the annular groove on the shaft section engages with a projection that protrudes radially to the axis of rotation, for example an annular flange, on the passage opening.

In both of the above-mentioned embodiments of the transmission element, a shaft section is provided. The switching actuator is preferably arranged on the shaft section. A rotary actuator for actuating the transmission element by The actuating arm or crank arm of the transmission element, which is provided on the axis of rotation and arranged on the shaft section, preferably protrudes further radially from the shaft section with respect to the axis of rotation than the switching actuator. The switching actuator is, for example, a contactless switching sensor, in particular a magnetic sensor or magnet.

However, it is also possible for the transmission gear to redirect a linear direction of movement of the actuating element in a first direction into a linear adjustment of the switching actuator in a second direction different from the first direction, for example an angle to the first direction, in particular a right-angled direction.

Preferably, no blocking contours are arranged on the transmission gear with which the other actuating element can be blocked when one actuating element is in a predetermined actuating position.

The transmission element is preferably mounted both on the pivot bearing, which is arranged on the wall of the switch housing, and also at a longitudinal distance with respect to the axis of rotation on the switch housing, for example on a wall of the switch housing that is opposite the passage opening. It is advantageous if the transmission element is mounted on opposite walls of the switch housing so that it can rotate with respect to its axis of rotation.

The invention provides that the switch not only has the aforementioned actuating element and the switching actuator, but that the actuating element forms a first actuating element and the switching actuator forms a first switching actuator for actuating the switching element, which represents a first switching element. The switch also has a second actuating element arranged outside the switch housing and adjustable between at least two actuating positions, as well as a second switching actuator that can be actuated by the second actuating element for actuating a second electrical switching element. The switch can therefore therefore perform a second function using the second switching actuator and the second electrical switching element.

The second actuating element is coupled in motion to the second switching actuator by means of a second transmission element which passes through a second through-opening on a wall of the switch housing. This wall can be the same wall on which the transmission element of the first switching actuator is rotatably mounted.

It is according to the invention if the second transmission element is mounted linearly along a sliding axis with respect to the switch housing. It is according to the invention if the second transmission element penetrates the passage opening in a linearly displaceable manner along a sliding axis, for example if it is mounted displaceably on the passage opening.

According to the invention, the sliding axis is parallel to the axis of rotation of the first switching actuator, or runs at an angle of less than 90° to the axis of rotation of the first switching actuator.

With the second transmission element and the second switching actuator, for example, the drive motor can be switched on and/or off and/or changed in terms of its speed.

It is preferred if the actuating elements are arranged on the same side of the switch housing. Thus, both actuating elements can be actuated by an operator from the same side.

It is advantageous if the rotation axis of the first transmission element and the sliding axis of the second transmission element enclose an angle of less than 60°, particularly preferably less than 30°, with respect to one another.

At least one of the actuating elements or both actuating elements expediently have blocking contours for blocking the other actuating element. In particular, it is advantageous if the actuating elements and/or the blocking contours of the actuating elements are designed for mutual blocking. For example, it is possible for one of the actuating elements to block actuation of the other actuating element from a first actuating position to a second actuating position in a predetermined actuating position, for example an intermediate actuating position. For example, it can be provided that the sliding actuating element blocks actuation of the first actuating element when it is moved from its non-actuated starting position to an actuating position, so that, for example, a direction of rotation of the drive motor cannot be switched when the drive motor is already running. However, it is also possible that the actuating element for the direction of rotation, preferably the first actuating element, only allows actuation of the second actuating element, with which the drive motor can be switched on, for example, when the first actuating element is in a defined first or second actuating position, but not in an intermediate position between the first and second actuating positions. In the first and second actuating positions, the first actuating element can be used to set, for example, clockwise or anti-clockwise rotation of the drive motor.

The blocking contours are preferably arranged directly on the respective actuating element, in particular its actuating body or actuating housing.

The switch chamber that accommodates the first switch actuator expediently forms a first switch chamber. The second switch actuator is arranged in a second switch chamber that is separate from this first switch chamber. Both switch actuators are therefore arranged in switch chambers that are separate from one another.

For example, it is possible for the first and second switch chambers to be separated or partitioned off from one another by a bulkhead. The bulkhead can, for example, be connected to the side walls or peripheral walls of the switch housing.

Furthermore, it is advantageous if the first switch chamber is sealed from the second switch chamber. For example, sealing contours, sealing projections or the like are provided which engage with one another and seal and separate the switch chambers from one another. It is advantageous if at least one labyrinth seal and/or an elastic seal or rubber seal is provided between the first and second switch chambers.

The second switch chamber is expediently closed or sealed with the exception of the second passage opening or the bearing opening for the second transmission element. For example, the first and/or second switch chamber is surrounded by peripheral walls, in each case a base wall and a top wall.

A seal, for example a ring seal, an O-ring or the like, is preferably arranged at the second passage opening or bearing opening for the second transmission element. The sealing measures already mentioned in connection with the first transmission element, namely, for example, a sealing flange that engages in an annular sealing receptacle, are also easily possible with the second transmission element.

The switch is preferably provided with a spring arrangement for loading at least one switching actuator, in particular the second switching actuator, into a predetermined switching position. A latching arrangement, clamping arrangement or other fixing arrangement for latching or fixing at least one switching actuator in a predetermined switching position is advantageous. For example, the first actuating element or a component coupled to the first actuating element can be latched using the latching arrangement or fixing arrangement, in particular in order to fix a rotation direction specification of the switch.

The spring arrangement or locking arrangement can act directly on the switching actuator, but also on the actuating element that activates the switching actuator.

At least one switching actuator, preferably both switching actuators, are designed as magnets or have a magnetic sensor and/or a contactless switching sensor, e.g. a capacitive or optical sensor, or are designed in this way. Of course, other actuation principles, for example mechanical actuation principles, optical sensors, etc., are also possible. The switching actuator can also actuate electrical contacts, for example between an on position or an off position.

At least one of the electrical switching elements is expediently arranged outside the switch housing and/or on a circuit board. The circuit board expediently forms a component of a power supply device for supplying power to the drive motor of the hand-held power tool. Thus, for example, one or more switching elements that can be actuated by the switch can already be arranged on the circuit board. The switch can therefore have the switching element, but it does not have to. It is sufficient if the switching element is a component of the circuit board, while the at least one switching actuator is a component of the switch according to the invention.

The electrical switching element or elements that can be switched by the switch are advantageously arranged on a circuit board, with the respective switching element preferably being arranged in a sandwich-like manner between the switch housing and the circuit board. Alternatively or additionally, it is advantageous if the circuit board is cast with the switch housing using a casting compound. It is preferred if the switch housing or the switch has sealing projections that protrude towards the circuit board and limit a holding capacity for the respective switching element. This makes it possible, for example, for the casting compound not to flow to the switching element, but to be held outside the cavity for the switching element by the sealing projections.

The invention further relates to a hand-held power tool with a switch as described above.

A hand-held power tool according to the invention is preferably a screwing machine and/or drilling machine. However, other hand-held power tools can also be easily equipped with the switch according to the invention, in particular those hand-held power tools in which a direction of rotation of the drive motor can be specified using the switch according to the invention, for example clockwise or anti-clockwise rotation.

The switch housing is preferably in two parts and/or has matching housing shells which, when arranged next to one another, delimit one or more switch chambers. For example, the switch housing comprises a housing base part which is covered by a housing cover. Side walls which protrude in the direction of the other part can be provided on the housing base part and the housing cover. A seal is preferably provided between the two housing parts, the housing base part and the housing cover. The housing parts, i.e. the housing base part and the housing cover, can complementarily delimit a passage opening or bearing opening for one or both of the aforementioned transmission elements.

Figur 1

eine Seitenansicht einer Hand-Werkzeugmaschine mit einem Schalter, deren Maschinengehäuse geöffnet ist,

Figur 2

eine Draufsicht auf eine Bestromungseinrichtung und dem Schalter der Hand-Werkzeugmaschine gemäß Figur 1,

Figur 3

eine Seitenansicht des Schalters gemäß vorstehender Figuren mit geöffnetem Schaltergehäuse und nicht betätigtem zweiten Betätigungselement oder Einschaltelement,

Figur 4

die Ansicht gemäß Figur 3, jedoch mit in Einschaltstellung betätigtem ersten Betätigungselement,

Figur 5

eine perspektivische Schrägansicht des Schaltelements gemäß vorstehender Figuren, wobei das zweite Betätigungselement in einer Neutral-Betätigungsstellung steht,

Figur 6

die Ansicht gemäß Figur 5, jedoch mit in eine erste, einem Linkslauf des Antriebsmotors der Hand-Werkzeugmaschine gemäß Figur 1 zugeordnete Betätigungsstellung verstelltem Betätigungselement,

Figur 7

die Ansicht gemäß Figuren 5 oder 6, jedoch mit dem zweiten Betätigungselement, welches in eine einem Rechtslauf des Antriebsmotors zugeordnete zweite Betätigungsstellung verstellt ist,

Figur 8

einen Schnitt durch das Schaltelement gemäß vorstehender Figuren entlang einer Schnittlinie A-A in Figur 3 entsprechend der Betätigungsstellung gemäß Figur 5,

Figur 9

den Schnitt gemäß Figur 8, jedoch in der Betätigungsstellung gemäß Figur 6 des ersten Betätigungselements,

Figur 10

den Schnitt gemäß Figuren 8, 9, jedoch mit in die Betätigungsstellung gemäß Figur 7 verstelltem ersten Betätigungselement,

Figur 11

eine Explosionsdarstellung des Schalters gemäß vorstehender Figuren und

Figur 12

eine perspektivische Schrägansicht des Schalter gemäß vorstehender Figuren schräg von oben.

An embodiment of the invention is explained below with reference to the drawing.

Figure 1

a side view of a hand-held machine tool with a switch, the machine housing of which is open,

Figure 2

a plan view of a power supply device and the switch of the hand-held machine tool according to Figure 1 ,

Figure 3

a side view of the switch according to the preceding figures with the switch housing open and the second actuating element or switching element not actuated,

Figure 4

the view according to Figure 3 , but with the first actuating element in the on position,

Figure 5

a perspective oblique view of the switching element according to the preceding figures, wherein the second actuating element is in a neutral actuating position,

Figure 6

the view according to Figure 5 , but with a first, counterclockwise rotation of the drive motor of the hand-held machine tool according to Figure 1 assigned actuating position of adjusted actuating element,

Figure 7

the view according to Figures 5 or 6 , but with the second actuating element which is adjusted to a second actuating position associated with a clockwise rotation of the drive motor,

Figure 8

a section through the switching element according to the above figures along a section line AA in Figure 3 according to the operating position according to Figure 5 ,

Figure 9

the cut according to Figure 8 , but in the operating position according to Figure 6 of the first actuating element,

Figure 10

the cut according to Figures 8, 9 , but with the operating position according to Figure 7 adjusted first actuating element,

Figure 11

an exploded view of the switch according to the above figures and

Figure 12

a perspective oblique view of the switch according to the above figures, taken obliquely from above.

A hand-held machine tool 10 has a machine housing 11 in which a drive train 15 with a drive motor 16 is arranged. The drive train 15 is located in a drive section 12, of which a handle section 13 protrudes for gripping or grasping by an operator. The handle section 13 protrudes from the drive section 12 at an angle, for example in the manner of a pistol handle, in particular at an angle of approximately 80-90°.

The drive motor 16 could directly drive an output element 19 with a corresponding tool holder in which, for example, a screwdriver bit, a drill or the like can be accommodated. In the present case, however, a gear 17 is connected between the drive motor 16 and the output element 19.

A control module 20 is provided for controlling and operating the drive train 15 and thus the hand-held machine tool 10 as a whole, which comprises a power supply device 21. The control module 20 is located essentially in the handle section 13. With regard to the machine housing 11, it should also be noted that only the other housing part 14 at the rear in the drawing is shown, while a complementary housing part which closes the interior of the machine housing 11 together with the housing part 14 shown is not visible in the drawing.

The power supply device 21 comprises a plate 22 on which various electronic and electrical components (not visible in the drawing) are arranged for controlling the drive motor 16, in particular for supplying it with power. However, switching elements 23 and 24, for example magnetic sensors, are shown schematically. The switching element 23 can be used, for example, to switch the power supply device 21 and thus the drive motor 16 on or off. In addition, a speed of the drive motor 16 can be specified using the switching element 23. The switching element 23 can also be referred to as an accelerator switching element. The direction of rotation of the drive motor 16 can be set using the switching element 24, for example clockwise or anti-clockwise rotation.

The power supply device 21 is connected or can be connected to the drive motor 16, in particular to its excitation coils of an excitation coil arrangement (not shown in more detail in the drawing), by means of lines 25. The drive motor 16 is, for example, a brushless motor or electrically commutated motor. However, it would also be possible to use a switch 30, with which the switching elements 23 and 24 can be switched, with a universal motor or other electrical motor.

The power supply device 21 is connected or can be connected by means of lines 26 to a supply interface 28, via which the hand-held power tool 10 can be supplied with electrical energy. For example, an electrical supply line, e.g. a power cable, for connection to an electrical supply network, for example with 110 volts or 230 volts alternating current, can be provided on the supply interface 28 in a manner not shown. In the present case, however, the hand-held power tool 10 is a hand-held power tool that can be operated wirelessly. The supply interface 28 is used to connect a schematically indicated electrical energy storage device 29, for example a battery pack. Electrical energy stored in the energy storage device 29 is used to supply the power supply device 21 and thus the drive motor 16.

When operating the hand-held power tool 10 in particularly dusty environments, there is a risk that the sensitive electrical components, switching elements or the like will become dirty. Particularly problematic are ferromagnetic dusts that can magnetically adhere to magnetic sensors, for example to magnetic sensors of the switch according to EP 2 395 527 A1 However, these problems do not occur with switch 30 or occur to a significantly reduced extent.

The switch 30 comprises actuating elements 31 and 32 with which the switching elements 23 and 24 can be actuated. The actuating element 31 can therefore be used to switch the drive motor 16 on and off and to influence its speed, while the actuating element 32 is provided for specifying the direction of rotation of the drive motor 16.

The switch 30 has a switch housing 33 in which separate switch chambers 34 and 35 are provided. The switch housing 33 comprises a housing base part 36, which is closed by a housing cover 37. Both switch chambers 33 and 34 are closed on the periphery with the exception of through openings 53, 54 on side walls 51, 52 of the switch chambers 34 and 35. Between the switch chambers 34 and 35 there is also a bulkhead 42, which separates the switch chambers 34 and 35 from each other.

The housing base part 36 and the housing cover 37 form housing parts 36A, 37A which complement each other and close the switch chambers 34, 35.

The housing base part 36 has a base wall 45 from which peripheral walls 46 protrude. The housing cover 37 has a cover wall 47 from which peripheral walls 48 protrude. The end faces of the peripheral walls 46, 48 as well as the wall sections of the housing base part 36 and the housing cover 37 forming the bulkhead 42 lie opposite one another with their end faces.

On these end faces of the peripheral walls 46, 48 and the bulkhead wall sections of the bulkhead 42, sealing projections 38, 39 are provided to delimit the switch chambers 34, 35 and, complementary thereto, sealing receptacles 40, 41 into which the sealing projections 38, 39 engage to form a seal and thus form seals 38A, 39A. The seals 38A, 39A seal the switch chambers 34, 35 from one another and from the environment. The sealing projections 38, 39 are designed, for example, in the form of springs that engage in the sealing receptacles 40, 41 designed as receiving grooves.

The sealing projections 38, 39 together with the sealing receptacles 40, 41 form, for example, labyrinth seals. Instead of the sealing projections 38, 39, sealing receptacles could also be provided, into which, for example, a rubber seal, in particular in the form of an O-ring or a sealing lip, is inserted. Furthermore, the sealing projections 38, 39 can also be designed as elastic sealing projections or rubber sealing projections.

It is particularly advantageous that the switch chambers 34 and 35 are sealed against one another and/or tightly separated from one another by the seals 38A, 39A. For example, the seals 38A, 39A comprise a sealing section 38B, for example in the manner of a labyrinth seal, which extends along an area 35A where the switch chambers 34 and 35 directly adjoin one another. For example, the sealing section 38B comprises sections of the sealing projections 38, 39 and sealing receptacles 40, 41 which engage in one another in the manner of labyrinth seals.

The two switch chambers 34, 35 are therefore sealed by a sealing arrangement, both from the environment and from each other. Switch actuators 65, 75 housed in the interiors of the switch chambers 34, 35 are therefore protected from environmental influences.

The housing base part 36 and the housing cover 37 are locked together using a locking arrangement. For example, locking projections 43, in particular locking hooks or the like, are provided on the housing base part 36, which engage in locking receptacles 44 of the housing cover 37. The locking projections 43 and locking receptacles 44 form a locking arrangement 43A and are provided, for example, in the area of the peripheral walls 46, 48. Preferably, several locking projections and locking receptacles arranged at a distance from one another are provided, so that the housing cover 37 is held firmly on the housing base part 36. Of course, gluing, welding or some other similar connection of the housing base part 36 and the housing cover 37 would also be possible, so that these two parts are held firmly together and the switch chambers 34, 35 are sealed.

On the switch housing 33, for example the housing cover 37, cable receptacles 49 are advantageously provided, which are suitable for receiving cables, in particular the cables 25.

Furthermore, the switch housing 33 is supported on the circuit board 22 by means of support feet 50. The support feet 50 form a space between the bottom wall 45 and the circuit board 22 is provided with a distance in which the switching elements 23, 24, for example semiconductor components, are arranged in a sandwich-like manner. It is possible for the bottom wall 45 to be in contact with the switching elements 23, 24, for example to lie flat against their upper side facing the switch 30. However, it is also possible for there to be a distance between the bottom wall 45 and the switching elements 23, 24. A sealing projection 51A preferably protrudes from the bottom wall 45 in the direction of the circuit board 22, which delimits an interior space in which the switching element 23 and/or the switching element 24 are arranged. The switch housing 33 is advantageously cast with the conductor body 22 using a casting compound 27A, which is held by the sealing projection 51A, so that the switching elements 23, 24 do not come into contact with the casting compound 27A, but are accommodated in a cavity that is closed, so to speak, by the casting compound 27A, the base wall 45 and the circuit board 22. The casting compound 27A forms a casting body 27 that holds the switch housing 33 to the circuit board 22 and preferably protects electrical components that are arranged on the circuit board 22 from environmental influences.

The actuating element 31 is connected to the switching actuator 65 by means of a transmission body 60. The switching actuator 65 comprises, for example, a magnet or is formed by a magnet 65A, by the action of which the switching element 23 can be actuated. The transmission element 60 forms a component of a sliding guide or a sliding bearing 60A. The transmission element 60 has a shaft section 61 which is connected to the actuating element 31 by a holding section 62, for example a holding projection, and which engages, for example, in a holding receptacle 31A, in particular a plug-in receptacle, of the same. The transmission element 60 therefore protrudes from the actuating element 31 in the direction of the switch housing 33 and engages in it.

At the longitudinal end of the shaft section 61 opposite the actuating element 31, a slide 63 is arranged, which is guided linearly in a slide guide 57 with respect to a sliding axis S. The slide guide 57 is provided in the switch chamber 34, so that the slide 63 with respect to the sliding axis S or is slidably received in the switch chamber 34 along the sliding axis S. The slide guide 57 comprises, for example, a guide projection 57A and a guide receptacle 57B on the slide 63 and the switch chamber 34.

The sliding axis S and the rotation axis D are parallel to each other.

The switching actuator 65, for example a magnet, is arranged on the slide 63. By adjusting the slide 63 and thus the switching actuator 65 along the sliding axis S, a relative position of the switching actuator 65 with respect to the switching element 22 can be adjusted so that the latter assumes different switching positions. If, for example, starting from an actuating position A, which corresponds to a switch-off position, the actuating element 31 is actuated in the direction of an actuating position E, i.e. a switch-on position ( Figure 4 ), the magnetic field of the switching actuator 65 actuates the switching element 23, for example to switch the drive motor 16 on or off or to change its speed.

An advantageous measure provides that when the actuating element 31 is actuated for the first time from the actuating position A in the direction of the actuating position E, the switching element 23 is woken up, so to speak, and activates the other components of the power supply device 21. If the switching element 31 remains unactuated for a predetermined time, i.e. assumes the actuating position A, the switching element 23 switches off the hand-held machine tool 10 or its electronic components, in particular the power supply device 21, i.e. enters a type of sleep mode, so that the electrical energy consumption is minimal or even switched off.

The switching actuator 65 is spring-loaded in the direction of the actuating position A by a spring arrangement 64A with a spring 64 which is supported on a side opposite to the passage opening 53, namely on a support 58. Thus, the operator can move the switching actuator 65 against the Spring force of spring 64 from actuating position A towards actuating position E.

A seal 66 is preferably arranged on the through-opening 53, which at the same time represents a bearing receptacle for a sliding bearing for the transmission element 60. The seal 66, for example a sealing ring, in particular a sealing ring made of foam and/or an O-ring, is penetrated by the transmission element 60 and lies sealingly against its outer circumference. In the switch housing 33, in particular the side wall 51 close to the through-opening 53, a sealing receptacle 55, for example an annular groove, is provided for the seal 66, in which the seal 66 is received. The housing base part 36 and the housing cover 37 have sections 67A, 67B of a bearing receptacle 67 or the through-opening 53 in the area of the side wall 51. The transmission element 60 is guided linearly with respect to the sliding axis S on the bearing receptacle 67 or the through-opening 53. The bearing holder 67 comprises, for example, sleeve-shaped sections 67A, 67B arranged on the housing base part 36 and the housing cover 37.

To actuate the switching actuator 75, a transmission element 70 is provided which is mounted so as to be rotatable about an axis of rotation D in relation to the switch housing 33. The transmission element 70 has a shaft section 71 which is located essentially within the switch chamber 35 and penetrates a through-opening 54 on the side wall 52 of the switch chamber 35 or on the switch housing 33. The through-opening 54 simultaneously forms a bearing receptacle of a rotary bearing 77 on the side wall 52. Sleeve-shaped sections 79A, 79B of the bearing receptacle 79 or the through-opening 54 are provided on the housing base part 36 and on the housing cover 37.

On a side opposite the side wall 52, the shaft section 71 is rotatably mounted on a bearing receptacle 59 of a rotary bearing 59A. For example, to form the bearing receptacle 59, support sections or wall sections 59B protrude in front of a wall section of the peripheral walls 46 and/or in front of a wall section of the peripheral walls 48.

Between the bearing holder 59 and the pivot bearing 77, the switching actuator 75, for example a magnet 75A, is arranged on the shaft section 71, e.g. a holder 73, with which the switching element 24 can be actuated. Depending on a respective rotational position or angular position of the switching actuator 75 with respect to the rotation axis D, the switching actuator 75 adjusts between switching positions that are assigned to opposite directions of rotation of the drive motor 16, for example clockwise and anti-clockwise. The actuating element 32, which is designed as a sliding element, for example, assumes actuating positions R and L.

The actuating element 32 is mounted along an adjustment axis BS on the machine housing 11. The machine housing 11 has, for example, a bearing receptacle 95 on which the actuating element 32 is mounted so as to be displaceable with respect to the adjustment axis BS. In the actuating position R, for example, an actuating section 96 of the actuating element 32 protrudes further in front of one side of the machine housing 11 than an actuating section 97 of the actuating element 32 protrudes in front of the other, opposite side of the machine housing 11. The operator therefore presses on one of the actuating sections 96 or 97 in order to actuate the actuating element 32 from the actuating position R into the actuating position L or vice versa.

A transmission gear 80 is provided for transmitting the linear movement of the actuating element 32 along the actuating axis BS into a rotary movement of the transmission element 70 about the rotation axis D. The transmission gear 80 is, for example, a crank gear 81. For example, a crank arm 72 protrudes at an angle, in particular at a right angle, from the shaft section 71 of the transmission element 70. An actuating arm 74 in turn protrudes at an angle from the crank arm 72, with the actuating arm 74, the crank arm 72 and the shaft section 71 extending in steps in side view. Thus, a longitudinal axis of the shaft section 71 (which corresponds to the rotation axis D) and a longitudinal axis of the actuating arm 74 are parallel to one another.

The crank arm 72 is rotatable about the rotation axis D and pivots in a circular path about the rotation axis D. The crank arm 72 is pivotably received about a pivot axis K between driving projections 82, which protrude from the actuating element 32. A pivot bearing or pivot bearing 83 with the rotation axis or pivot axis K for the actuating arm 74 is therefore provided between the driving projections 82. The components of the transmission element 70 arranged outside the switch housing 33 and the pivot bearing 82 thus form the crank mechanism 81.

It is also schematically shown in the drawing, but is readily possible, for example, that instead of the crank arm 72, a gear 172 is arranged on the shaft section 71, which meshes with a tooth section 182 of the actuating element 32, which is arranged, for example, on the side of the actuating element 32 facing this gear 172 and extends between its actuating sections 96, 97.

The crank gear 81 and thus the transmission gear 80 is arranged outside the switch housing 33. The switching actuator 75, for example a magnet, is arranged inside the switch housing 33, namely the switch chamber 35.

The actuating arm 74 forms a drive part 74A of the transmission gear 80 and at the same time of the transmission element 70. The shaft section 71 forms an output part 71A of the transmission gear 80 and at the same time of the transmission element 70. The transmission element 70 thus has the drive part 74A and the output part 71A in one piece.

A seal 76 is arranged on the pivot bearing 77 so that the transition area between the transmission element 70 and the switch chamber 35 is sealed. The seal 76 comprises, for example, a sealing flange 78, designed as an annular flange 78B, which projects radially outward in front of the shaft section 71 and into a sealing receptacle 56 of the switch housing 33 The seal receptacle 56 comprises, for example, an annular groove 56B on the side wall 52.

The sealing flange 78 and the sealing receptacle 56 also hold the transmission element 70 on the switch housing 33 so that it can be displaced longitudinally with respect to the rotation axis D. The sealing flange 78 and the sealing receptacle 56 thus form anti-displacement contours 78A and 56A, which hold the transmission element 70 in a non-displaceable manner with respect to the rotation axis D at the through-opening 54. The anti-displacement contours 78A and 56A engage with one another in a form-fitting manner and/or have or form support contours perpendicular to the rotation axis D, so that they hold the transmission element 70 in a non-displaceable manner with respect to the rotation axis D. The anti-displacement contours 78A and 56A, however, enable the transmission element 70 to be rotated about the rotation axis D with respect to the switch housing 33.

Depending on the respective angular position or switching position MN, ML, MR of the switching actuator 75, for example of the magnet, the switching element 24 assumes different switching positions, with which, for example, a clockwise or anti-clockwise rotation of the drive motor 16 can be set. The switching positions MN, ML, MR are assigned to the actuation positions N, L, R of the actuation element 32 and/or correlate with these actuation positions. In the switching positions MN, ML, MR, a magnetic field of the switching actuator 75 can penetrate the switching element 24 in different directions, so that the switching element 24 is controlled, for example, to output different sensor signals or control signals SIG to a control device 21A, for example a microcontroller. Based on these control signals or sensor signals, the switching element 24 of the control device 21A specifies, for example, that it controls the energizing device 21 to energize the drive motor 16 in the anti-clockwise direction of rotation or the clockwise direction of rotation.

However, if no clear direction of rotation is set, for example, the actuating element 32 assumes a middle or neutral actuating position N and the switching actuator 75 assumes the middle, so to speak undefined switching position MN, Blocking contours 90, 91 ensure that the actuating element 31 cannot be actuated from its actuating position A into one of the actuating positions E. On the other hand, when the actuating element 31 is actuated in one of the actuating positions E, a change in the direction of rotation of the drive motor 16 is blocked, ie the blocking contours 90, 91 prevent an adjustment of the actuating element 32 from the actuating position R into the actuating position L and vice versa when the actuating element 31 is actuated in one of the actuating positions E, ie a switch-on position of the drive motor 16.

The blocking contours 90, 91 act directly on one another. It is advantageous that the blocking contours 90, 91 do not act directly on the transmission gear 80 or its components. The blocking contours 90, 91 are expediently not in engagement and/or direct contact with the transmission gear 80 or its components and/or the transmission element 70.

The blocking contours 90, 91 comprise, for example, blocking projections 92, 93 on the actuating elements 31, 32. The blocking projection 92 protrudes, for example, from an upper side of the actuating element 31 facing the actuating element 32. In particular, the blocking projection 92 is designed as a rib. The blocking contour 91 protrudes from the actuating element 32 in the manner of a blocking projection 93. In the actuating position N, the blocking projections 92, 93 strike one another, so that actuation of the actuating element 31 in the direction of one of the actuating positions E is not possible.

In addition to the blocking projection 92, there are free spaces or recesses into which the blocking projection 93 can engage when the actuating element 32 is adjusted to one of the actuating positions R or L. The actuating element 31 can then be adjusted from the actuating position A to one of the actuating positions E. On the other hand, it is then not possible for the actuating projection 93 to be actuated past the actuating projection 92 from one of the actuating positions R, L to the other actuating position L, R.

Then the blocking projection 93 strikes the sides of the blocking projection 92 extending parallel to the sliding axis S.

The actuating element 32 can preferably be locked using a locking arrangement 98. The locking arrangement comprises, for example, a locking projection 99 which is fixed in position with respect to the switch housing 33 and/or machine housing 11 and which engages in one of two locking recesses 99R, 99L in the actuating positions R, L.

Claims (15)

1. Switch for a hand-held power tool (10) or as a component of a hand-held power tool (10), which has an electric drive motor (16) that can be switched on by the switch (30), wherein the switch (30) has a switch housing (33) with a switch chamber (35) in which a first switch actuator (75) that can be moved between at least two switch positions (ML, MR) is arranged in order to actuate a first electric switch element (24) and is movement-coupled with the aid of a first transmission element (70) to a first actuating element (32) of the switch (30), located outside the switch housing (33) and movable between at least two actuating positions (R, L), wherein the first transmission element (70) passes through a first through opening (54) in a wall of the switch housing (33), so that the first switch actuator (75) may be moved by moving the first actuating element (32) to actuate the first switch element (24), wherein at the first through opening (54) there is provided a rotary bearing (77), on which the first transmission element (70) is rotatably mounted around a rotation axis (D), wherein the switch (30) has a second actuating element (31), located outside the switch housing (33) and adjustable between at least two actuating positions (R, L), and a second switch actuator (65), actuable by the second actuating element (31) to actuate a second electrical switch element (31), wherein the second actuating element (31) is movement-coupled to the second switch actuator (65) with the aid of a second transmission element (60), which penetrates a second through opening (53) in a wall of the switch housing (33) and wherein the second transmission element (60) is mounted with linear movement facility along a sliding axis (S) with respect to the switch housing (33) and/or the second transmission element (60) penetrates the second through opening (53) with linear movement along a sliding axis (S), in particular being movably mounted at the second through opening (53), characterised in that the sliding axis (S) is parallel to the rotation axis (D) or runs at an angle of less than 90° to the rotation axis (D).
2. Switch according to claim 1, characterised in that the rotation axis (D) passes through the wall on which the rotary bearing (77) is provided and/or in that the rotation axis (D) is at an angle, in particular a right-angle, to a wall face of the wall on which the rotary bearing (77) is arranged or runs and/or in that the switch chamber (35) is closed with the exception of the first through opening (54) and/or in that, at the first through opening (54), shift-lock contours (78A, 56A) and/or a shift-lock are provided for a non-displaceable hold of the actuating element parallel to the rotation axis (D) or along the rotation axis (D) and/or in that at one of the components of the first through opening (54) and the first transmission element (70) there is provided at least one partly annular or completely annular flange (78B), which engages in a partly annular or completely annular slot (56B) of the other component of through the first through opening (54) and the first transmission element (70)
3. Switch according to claim 1 or 2, characterised in that there is provided at the first through opening (54) and/or the rotary bearing (77) a seal (76), or that the first through opening (54) and/or the rotary bearing (77) are in the form of a seal (76) or have a seal (76), wherein it is advantageously provided that the seal (76) encompasses the first transmission element (70) annularly and/or that the seal (76) comprises a seal flange (78) which engages in an annular seal location (56) and/or that the seal (76) comprises a labyrinth seal.
4. Switch according to any of the preceding claims, characterised in that the first actuating element (32) is translationally mounted on a slide bearing relative to the switch housing (33).
5. Switch according to any of the preceding claims, characterised in that a transmission gear (80) is provided between the first switch actuator (75) and the first actuating element (32), in particular between the first transmission element (70) and the first actuating element (32), wherein it is advantageously provided that the transmission gear (80) is located outside the switch housing (33) and/or that the transmission gear (80) is designed and provided to convert a linear movement or translational movement of the first actuating element (32) into a rotational movement of the first switch actuator (75) and/or that the transmission gear (80) comprises or is formed by a crank gear (81) and/or a toothed gearing, in particular comprising a gear rack and a gearwheel.
6. Switch according to any of the preceding claims, characterised in that the first transmission element (70) is rotatably mounted, with longitudinal clearance relative to the rotation axis (D) to the rotary bearing (59) which is located on the wall of the switch housing (33), to the switch housing (33), in particular on a wall of the switch housing (33) which lies opposite the first through opening (54).
7. Switch according to any of the preceding claims, characterised in that the sliding axis (S) runs at an angle of less than 60°, and more preferably less than 30° to the rotation axis (D).
8. Switch according to any of the preceding claims, characterised in that the actuating elements (31, 32) are arranged on the same side of the switch housing (33) and/or the first through opening (54) and the second through opening (53) are arranged on side walls (51, 52) flush with one another or a common side wall (52) and/or the same flat side of the switch housing (33).
9. Switch according to any of the preceding claims, characterised in that a drive section (74A) of the transmission gear (80) in engagement with the first actuating element (32) is located in a space between the switch housing (33) and the second actuating element (31) or protrudes into that space.
10. Switch according to any of the preceding claims, characterised in that at least one of the actuating elements (31, 32) has blocking contours (90, 91) for blocking the other actuating element (31, 32), wherein an or the actuating element (31, 32) in a predetermined actuating position (R, L), blocks an actuation of the other actuating element (31, 32) from a first actuating position (R, L) into a second actuating position (R, L), wherein it is advantageously provided that the actuating elements (31, 32) are designed for reciprocal blocking and/or that the blocking contours (90, 91) are not in direct contact with and/or disengaged from the transmission element (70) and/or a transmission gear (80) between the transmission element (70) and the actuating element (32) which actuates it.
11. Switch according to any of the preceding claims, characterised in that the switch chamber (35) accommodating the first switch actuator (75) forms a first switch chamber (35) and the second switch actuator (65) is located in a second switch chamber (34) separate from this first switch chamber (35), wherein it is advantageously provided that the first and the second switch chamber (34) are separated or screened off from one another by a partition wall (42) and/or that the first switch chamber (35) is sealed off from the second switch chamber (34), in particular with the aid of a labyrinth seal and/or an elastic seal or rubber seal.
12. Switch according to any of the preceding claims, characterised in that the second switch chamber (34) is closed except for the second through opening (53) or the labyrinth seal and/or that a seal (66) is provided at the second through opening (53) and/or that the first switch actuator (75) and the first switch element are provided and designed for presetting a direction of rotation of the drive motor (16) of the hand-operated power tool (10) and/or the second switch actuator (65) and the second switch element (23) for switching on and off and/or for changing a speed of the drive motor (16) of the hand-operated power tool (10).
13. Switch according to any of the preceding claims, characterised in that it has a spring assembly (64A) for biasing at least one switch actuator (75) into a predetermined switching position (ML, MR) and/or a latching arrangement (98) for engaging at least one switch actuator (75) in a predetermined switching position (ML, MR) and/or that it has at least one switch actuator (65, 75), which is in the form of a non-contact switch actuator and/or a magnet (65A, 75A) or includes a magnet sensor and/or that at least one of the electrical switch elements (23, 24) is located outside the switch housing (33) and/or on a printed circuit board (22), in particular a printed circuit board (22) having a power supply unit (21) for power supply of the drive motor (16) of the hand-operated power tool (10) and/or that at least one electrical switch element (23, 24) which may be operated by the switch (30) is provided on a printed circuit board (22), with the relevant electrical switch element (23, 24) arranged in sandwich form between the switch housing (33) and the printed circuit board (22) and/or the printed circuit board (22) is cast with the switch housing (33) with the aid of a casting compound (27A) and/or that it has at least one switch actuator (65) and at least one electrical switch element (23) actuable by the switch actuator (75) which, on first actuation by the switch actuator (65) may be actuated from a sleep mode into an active mode, wherein the switch element (23) and an electrical device of the hand-operated power tool (10), actuable by the switch element (23) and connected electrically to it, in the sleep mode uses no electrical energy or less electrical energy than in the active mode.
14. Switch according to any of the preceding claims, characterised in that the switch housing (33) has a housing base part (36) and a housing cover (37) for closing the housing base part (36), wherein in each case one segment of at least one through opening (53, 54) is provided for a transmission element on the housing base part (36) and on the housing cover (37), so that the housing base part (36) and the housing cover (37) form the through opening (53, 54) in a complementary manner and encompass the transmission element when they are fitted together, wherein it is advantageously provided that between the housing top part and the housing base part (36) there is provided at least one seal (38A, 39A) and/or that the housing base part (36) and the housing cover (37) are locked together with the aid of a latching arrangement (43A).
15. Hand-operated power tool (10) with a switch (30) according to any of the preceding claims.

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