WO2009024331A2

WO2009024331A2 - Length-adjustable clipband for headgear

Info

Publication number: WO2009024331A2
Application number: PCT/EP2008/006829
Authority: WO
Inventors: Peter Rösler
Original assignee: Schuberth Gmbh
Priority date: 2007-08-20
Filing date: 2008-08-20
Publication date: 2009-02-26
Also published as: WO2009024331A4; DE102007039288A1; WO2009024331A3

Abstract

Length-adjustable clipband for headgear and similar, comprising a strap with a toothed web (3) fixed thereto, which is in toothed engagement with a clip device (4) fixed to another strap on which an operating body is arranged, on operation of which the toothed engagement with the toothed web is disengageable, characterised in that the clip device which is fixed to one of the straps (2) has a one-way pivotable spring-loaded design for a one-handed operation with the fingers of one hand and on the free sprung end a toothed rack (9) is provided which oppose the toothing (17) of the toothed web and may be selectively engaged or disengaged therewith.

Description

Length adjustable locking band for headgear

The invention relates to a variable length locking band for headgear according to the preamble of claim 1.

With the subject matter of DE 20 2005 013 696 U1 a snap fastener in webbings has become known, which is also suitable for webbings of headgear. Therefore, the present invention relates to all headgear, which are suitable to be provided with a length-adjustable locking band, such. As safety helmets, bicycle helmets, light Industriestoßschutzkappen and the like.

In the subject matter of DE 20 2005 013 696 111, the toothed belt has an end face, i. on the narrow side arranged teeth on. The lock slide, which can be brought into engagement with the toothed belt, therefore also has lateral tooth combs or engagement pawls which are suitable for being brought into engagement with the obliquely arranged toothing of the toothed belt. Disadvantage of such a known latching closure with a toothed belt and a locking slide is given the relatively high cost in the production of these two parts. Namely, it must be connected to the closure slide with its own webbing, as well as the rack, which is opposite to the shutter and is engageable with this.

Another disadvantage is that for closing the locking strap two hands are needed, because with one hand, the rack must be held, while with the two fingers of the other hand, the two opposing locking latches must be operated on the shutter.

This results in an increased handling effort. Therefore, such an arrangement is not suitable, in the closed state only with the fingers of one hand in an extended opening position or the belt spacing of the two straps reduced closing position to be brought. It always requires two hands.

Although such an arrangement is well suited for a snap fastener on a webbing to be attached under the chin of a person. However, if such a snap closure for the occipital region of a protective helmet are used, it is difficult to bring the two hands overhead in the occipital area to operate the latch with two-handed operation.

The invention is therefore based on the object, a snap closure of the type mentioned in such a way that it is suitable for a single-handed operation on a helmet in the occipital region.

To solve the problem, the invention is characterized by the technical teaching of claim 1.

An essential feature of the invention is that the latching device, which is attached to the one webbing, is pivotally spring loaded on one side and a tooth comb is disposed at the free resilient end, which is opposite to the toothing of the opposite toothed belt and selectively engageable or disengageable therewith is.

Due to the one-sided resilient design of the locking device, the essential advantage is achieved that the locking device can be brought only with a finger of one hand in an open position or in a closed position and spring-loaded always springs back into the closed position.

The closed position is characterized in that the toothed comb arranged on the free resilient part of the latching device can be brought into toothed engagement with the associated teeth of the toothed belt.

If, however, pressed on an upper actuator plate, then this actuator plate acts as a one-armed lever, and the entire latching device pivots about a horizontal pivot axis which is parallel to the plane of Toothed belt and the webbing is around this axis and thus brings the tooth comb out of engagement.

This makes it possible for the first time to provide a one-hand operation for a locking device, which was previously not possible.

To achieve the resilience of the locking device, it is hereby provided that the actuating plate merges via vertical connecting walls into a base plate and that in the region of the base plate longitudinally extending slots are arranged, which form querschnittsschwächende recesses toward the side walls of the locking device.

The side walls are in this case via corresponding guide lugs always in guiding engagement with the toothed belt, while the slots delimit the side walls of the actuator, so that this actuator - consisting of the actuating plate, the connecting walls and the base plate - is resiliently formed to the side walls.

In this case, it is preferred if the entire arrangement is injection-molded from a material-integral plastic, because this saves manufacturing costs.

In a further development of the invention, it is provided that the entire locking device is formed in one piece of material from the same plastic material as the webbing attached thereto, so that the webbing and the locking device form a single plastic injection molded part.

Of course, it may be provided to use a multi-component plastic, for example, the webbing gives a different flexibility than the flexibility of the material on the webbing attaching locking device.

In the same way, it is provided in another embodiment of the invention that the toothed band material integral with the there on it attaching webbing is formed. Again, it is a part made by plastic injection molding, so that the webbing and the toothed belt are made of a material-integral plastic. Again, it may be provided to form the toothing in the region of the toothed belt from another (eg harder) plastic, as the remaining material of the webbing on which the toothed belt attaches material einstückig.

In a further development of the invention, moreover, it is provided that the tooth bevels of the teeth of the toothed belt are inclined at an angle to the vertical and the teeth of the toothed comb of the detent device have the same inclination.

This results in that when pulling the teeth of the toothed belt up and digging reinforced tensile load and buried in the interdental spaces of the tooth comb on the locking device, so that a high tensile force can be transmitted to the two opposing straps without the locking device itself opens.

When pulling action on the two straps, which acts in the sense of a tearing movement, thus the locking engagement solidifies on the locking device between the tooth comb of the locking device and the toothed belt.

The invention provides in a preferred embodiment, two actuation options for the locking device. It is essential that two different handles are arranged on the actuating plate of the locking device. The one handle consists of a small guide lug, which is arranged in the region of the pivotable part of the latching device and is formed approximately (above) over the toothed ridge of the latching device. In attack and train on this small handle so the entire locking device can be pivoted together with the actuator plate so that the tooth comb out of engagement with the opposite toothed belt. This handle forms a relatively long lever arm to the horizontal pivot axis. As a second operation measure, it is provided to utilize the lever arm on the actuator plate and in this case to press the aforementioned handle opposite surface of the actuator plate, which in turn takes place a pivoting movement about a horizontal axis and the latching device pivoted about this horizontal axis up and turn the tooth comb the locking device is disengaged from the toothed belt. This larger plate surface on the actuator plate acts as a lever, because this plate surface is located beyond the pivot axis of the locking device and pressure on this plate surface is again achieved by utilizing leverage a spring-loaded pivotal movement about the horizontal pivot axis and turn the tooth comb turn out of engagement with the Teeth of the dental tape is brought.

This results in significant advantages in the operation of such a snap closure in the occipital region of a helmet, a cap or a lightweight shock protection helmet.

It is always assumed that the belt straps assigned to each other are in the closed state, ie. H. that the dental tape is already in the

Tooth engagement with the locking device is located on the opposite webbing.

It is only now necessary to change the length between the straps.

Serves the one-handed operation according to the invention, because it is sufficient with the

Finger of a hand to press the actuator plate of the Rastvorhchtung to bring the locking device spring loaded disengaged and optionally also in engagement with the opposite toothed belt.

The subject of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other.

All information and features disclosed in the documents, including the abstract, in particular the spatial ones shown in the drawings Training, are claimed as essential to the invention, as far as they are new individually or in combination over the prior art.

In the following the invention will be explained in more detail with reference to drawings showing only one embodiment. Here are from the drawings and their description further features essential to the invention and advantages of the invention.

Show it:

Figure 1: Top view of a snap closure according to the invention

FIG. 2: section according to the line III-III in FIG. 1

Figure 3: a half section of Figure 1 according to the line Ill-Ill in perspective view

Figure 4: an enlarged section through the locking device

FIG. 5: side section through the latching device according to FIG. 4

FIG. 6: Operation of the latching closure during one-handed pushing together of the latching device

Figure 7: Operation of the locking device in one-handed release of the locking device in the sense of a release movement

Figure 8: one-handed releasing locking device on the front of the actuator plate

In Figure 1, two opposing straps 1, 2 are shown, wherein the webbing 1 is material integral with a toothed belt 3, which has locking teeth 17. At the front end of the toothed belt 3 an insertion bevel exhibiting stop 18 is formed.

The opposite webbing 2 is materially connected to a detent device 4, which consists of an upper actuating plate 6, are connected to the lateral front and rear connecting walls 7 material integral. These connecting walls 7 merge into a foot plate 8 and on the underside of the foot plate 8 a tooth comb 9 with a number of locking teeth 21 (see FIG. 4) is arranged on the front pivotable part of the locking device 4.

It is advantageous that the opposing teeth 17, 21 of the tooth comb 9 and the toothed belt are not arranged in each case on the end sides, but on the broad sides, so that form very long tooth flanks, which are high load-transferring engaged.

It is important that the locking device 4 is resiliently pivotable about a pivot axis 33. For this purpose, Figure 1 shows that in the area of the base plate 8 directed forward, open slots 10, 11 are present, which separate the base plate 8 laterally adjoining side walls 12. In this way, the rear portion of the foot plate 8 is elastically bendable connected to the side walls 12, while the front portion is separated by the forwardly open slots 10, 11, so that the entire inner portion of the locking device with the actuating plate 6, the connecting walls. 7 and the foot plate 8 is formed spring-loaded about said pivot axis 33 pivotable.

Each side wall 12 continues forward and backward by guide lugs 13, which overlap a portion of the toothed belt 3 and thus form an extended longitudinal guide.

In half section of Figure 3, further details can be seen. It can be seen that an insertion opening 15 for the toothed belt 3 is provided in the direction of the arrow 14 between the surface of the belt 2 and the base plate 8. This is thus inserted in the direction of arrow 14 - the stop 18 in advance - in this insertion opening 15.

The ratchet teeth 17 of the toothed belt then come into toothed engagement with the associated ratchet teeth 21 of the tooth comb 9 of the locking device 4, and further overlap the guide lugs 13 front and rear at least partially the toothed belt 3, so that in this way a low-friction longitudinal guidance of the toothed belt is ensured in the locking device 4 ,

Likewise, it can be seen from FIG. 3 that in each case one side wall 12 is partitioned off through the slot 10, so that the entire inner or middle part of the latching device 4 is designed to be pivotable in a spring-loaded manner.

The toothed belt 3 has a number of latching teeth 17 and is limited at the rear end by a handle 5, which serves as a finger counter bearing in the operation of the latching closure.

FIGS. 4 and 5 show further details of the latching device 4.

It can be seen that the locking teeth 17 of the toothed belt 3 have a toothed slope 22 which is inclined at an angle 23 to the horizontal. In the same direction and the ratchet teeth 21 are aligned on the tooth comb 9 of the locking device 4. Now comes with held webbing 2, a force in the pulling direction 24 on the toothed belt 3, to release the two straps 1, 2 from each other, then set the ratchet teeth 17 of the toothed belt 3 in the direction of arrow 25 and thus the interlocking engagement between the ratchet teeth 17 and reinforced the associated ratchet teeth 21 of the tooth comb 9 at this traction.

In contrast, when a corresponding displacement force acts in the insertion direction 26 on the two straps 1, 2, the teeth slide 17, 21st smooth against each other away, and it is characterized a particularly low insertion force and displacement force in the insertion direction 26 given.

FIG. 4 also shows that the actuating plate 6 is designed as a one-armed lever, since the plate surface 30 required for actuation is arranged as a one-armed lever beyond the pivot axis 33 in order to ensure that, when pressure is applied to this plate surface 30, the front part of the actuating plate 6 so that the front side wall 7 pivots with the tooth comb 9 in the direction of arrow 29 upwards.

The handle 31 on the front side of the actuator plate 6, however, is small because it is located immediately opposite the pivotable tooth comb 9.

FIGS. 6 to 8 now show different types of actuation for the latching closure according to the invention.

It is always assumed that the toothed belt 3 is in meshing engagement with the webbing 2, wherein the minimum position of the two webbings is limited by the stop 19 on the toothed belt 3.

For manufacturing reasons, it is provided that in the region of the webbing 2, an exemption 20 is present, from which the entire locking device 4 is formed upwardly out of material einstückig in a corresponding injection molding tool.

FIG. 6 shows how with two fingers 27, 28 of a hand a change in length takes place in the sense of a shortening of the straps 1, 2. For this purpose, one finger 27 is touched on the handle 5, while the opposite finger 28 is touched on the handle 31 and thus the locking device 4 is spring-loaded pivoted upward in the direction of arrow 29, so the tooth comb 9 out of engagement with the To bring toothing of the toothed belt 3. The shutter can then in the direction of arrow 24th (Pulling direction) are moved against the handle 5. Thus, the distance between the straps 1 and 2 is reduced.

If, on the other hand, the distance between the straps is to be increased, then the operating mode according to FIG. 7 applies. It is again attacked with a finger 27 on the other side of the handle 5, and the opposite finger 28 now acts on the plate surface 30 as an enlarged lever arm. which in turn the entire latching device 4 is spring-loaded about the pivot axis 33 in the direction of arrow 29 is pivoted upwards. So it is sufficient a simple finger pressure on the lever-like plate surface 30 in the direction of arrow 32 to bring the entire assembly in the open position, because thus the webbing 1 is pulled out in the direction of arrow 24 from the locking device 4 and thereby increases the distance between the straps 1, 2 becomes.

FIG. 8 shows a second possible application such that attacking the handle 31 also pivots the detent device 4 in the direction of arrow 29, thereby dislodging the toothed comb 9 from the toothed belt 3, which in turn achieves an open position, ie an extension between the straps 1 and 2.

The extension of the head width can thus take place either after the operating mode of Figure 7 or 8.

Advantage of the entire arrangement is that you can almost blindly operate the locking device 4 with the fingers of one hand, without it being necessary to hold it against the fingers of the other hand or exert a pulling force.

This is a significant advantage, which allows the entire snap lock can be used in the occipital area or not under visual eye control body areas. Because of the ease of use of the latching closure according to the invention, the acceptance of safety helmets and other headgear is significantly increased, because the ease of use is improved.

Zeichnungsleqende

1 strap 18 stop

2 strap 19 stop

3 tooth band 20 exemption

4 locking device 21 locking tooth (tooth comb 9)

5 handle 25 22 tooth bevel (17, 21)

6 actuator plate 23 angle

7 connecting wall 24 pulling direction

8 foot plate 25 arrow direction

9 tooth comb 26 insertion direction

10 slit 30 27 fingers

11 slot 28 fingers

12 side wall 29 arrow direction

13 guide projection 30 plate surface

14 arrow direction 31 handle

15 insertion opening 35 32 arrow direction

16 outlet opening 33 pivot axis

17 locking tooth (toothed belt 3) 34 area

Claims

claims

1. Length adjustable locking band for headgear and the like, consisting of a webbing with a toothed belt (3) attached thereto, in the

Gear engagement with a fastened to the other webbing locking device (4) on which an actuator is arranged, in the actuation of the meshing engagement with the toothing of the toothed belt is detachable, characterized in that the locking band is designed for one-handed operation with the fingers of one hand in that the latching device (4), which is attached to the one webbing (2), is spring-loaded on one side and at the free resilient end a toothed comb (9) is arranged, which is opposite to the toothing (17) of the toothed belt (3) and selectively engageable or disengageable therewith.

2. Rastband according to claim 1, characterized in that the latching device (4) consists of an upper actuating plate (8) are connected to the lateral front and rear connecting walls (7) material integral, which merge into a base plate (8) and that on front pivotable part of the latching device (4) on the underside of the base plate (8) of the tooth comb (9) with a number of ratchet teeth (21) is arranged.

3. locking strip according to claim 2, characterized in that the latching device (4) about a horizontal pivot axis (33) is resiliently pivotable characterized in that in the region of the base plate (8) directed forward, open slots (10, 11) are present separating the footplate (8) from laterally adjoining side walls (12).

4. locking strap according to claim 3, characterized in that the rear portion of the foot plate (8) is elastically bendable connected to the side walls (12), while the front portion is separated by the forwardly open slots (10, 11), so that the entire inner region of the latching device with the actuating plate (6), the connecting walls (7) and the base plate 8 about the pivot axis (33) spring-loaded is formed pivotable.

5. locking strip according to one of claims 1 to 4, characterized in that the latching teeth (17) of the toothed belt (3) have a tooth slope (22) which is inclined at an angle (23) to the horizontal and that the latching teeth (21) on Tooth comb (9) of the locking device (4) are aligned in the same direction.

6. locking strap according to one of claims 1 to 5, characterized in that the actuating plate (6) of the latching device (4) is designed as a one-armed lever with two spaced-apart handles (30, 31).

7. locking strap according to claim 6, characterized in that the one handle as a plate surface (30) is formed, and that under pressure on the plate surface (30) of the front part and thus the front side wall (7) with the toothed comb (9) pivoted above and brings the tooth comb (9) out of engagement with the toothed belt (3).

8. locking strap according to claim 6 and 7, characterized in that the other handle (31) is designed as a short lower handle on the front of the actuating plate (6), which is arranged approximately vertically above the toothed comb (9).

9. locking strap according to one of claims 1 to 8, characterized in that at the rear end of the toothed belt (3) a further handle (5) is arranged, which is designed as an abutment for the finger of one hand, while the fingers of the same hand optionally at the other handles (30 or 31) of the locking device (4) can be applied.