TWI656991B - Seat adjustment device with improved brake - Google Patents

Abstract

An improved brake mechanism for a seat height adjustment device includes a ring body, an output member, a plurality of elastic pads, and a plurality of roller sets. The outer edge of the cam in the output member protrudes with a plurality of driven convex teeth each having an end edge and two hard joints, and a first gap exists between the end edge and the inner edge of the ring body and the first gap is greater than zero in a stationary state; The elastic pad is superposed on the inner surface of the driven convex tooth face-to-face and has two soft joints respectively protruding from the two hard joints, and the roller set comprises two rollers respectively adjacent to the two soft joints, the roller and the outer edge There is a second gap between them and the second gap is equal to zero in the stationary state; when the roller is pressed to start pushing the soft joint concave, the second gap will be greater than zero; when the roller continues to push the soft joint concave or even push When the hard contact is hard contact, the end edge of the driven convex tooth directly splices the inner edge in the load direction so that the first gap is equal to zero, and the second gap is greater than the first gap which is equal to zero. This reduces the stress on the roller and reduces wear and improves durability.

Description

Improved brake mechanism for seat height adjustment device (1)

The present invention relates to a seat height adjustment, and more particularly to an improved brake mechanism for a seat height adjustment device.

Regarding the seat height adjusting device, including a clutch mechanism and a brake mechanism that are coaxially arranged with each other, the control handle is connected to the clutch mechanism. The user drives the clutch mechanism via the control, and the clutch mechanism interlocks the brake mechanism. The output member in the brake mechanism drives the elevator in the chair such as a car seat, a massage chair or a wheelchair to control the lifting.

However, in the existing brake mechanism, the roller that is sandwiched between the inner edge of the brake mechanism and the outer edge of the cam is often subjected to a large external load (from the weight of the seat itself or the occupant's It is easy to wear due to weight, etc., which leads to unsatisfactory movements and even failure to act. It has long been criticized by people.

Therefore, how to design a invention which can improve the above-mentioned defects is a major problem that the inventors of the present invention are trying to solve.

An object of the present invention is to provide an improved brake mechanism for a seat height adjusting device, which can support at least one of the driven teeth to support the inner edge when receiving the external load, thereby reducing the force of the roller, thereby reducing wear and improving durability. .

In order to achieve the above object, the present invention provides an improved brake mechanism for a seat height adjusting device, comprising: a ring body having an inner edge; an output member disposed in the ring body and including a cam, the outer portion of the cam a plurality of driven convex teeth each having two rigid joints and one end edge connected between the two rigid joints, and each of the end edges and the inner edge has a first gap, and the first a gap is greater than zero in a stationary state; and a plurality of elastic pads and a plurality of roller sets are disposed between the outer edge and the inner edge, and each of the elastic pads is surface-to-facely overlapped on an inner surface of each of the driven teeth and Having two soft joints respectively protruding from the two rigid joints, each of the roller sets comprising two rollers adjacent to the two soft joints of each of the elastic pads, each of the rollers and the outer edge There is a second gap between the second gap, and the second gap is equal to zero in the stationary state; wherein when the roller is driven and just starts to press the soft joint recess, between the driven roller and the outer edge The second gap will be greater than zero; when the driven roller continues to push the soft joint concave Or when the soft joint is further pressed and further recessed to directly contact the hard joint, at least one end edge of the driven convex tooth directly splicing the inner edge in the load direction so that the first gap is equal to zero. And the second gap is greater than the first gap that is equal to zero.

Compared with the prior art, the present invention has the effect of reducing the force of the roller when subjected to an external load, thereby reducing wear and improving durability.

100‧‧‧Clutching agency

1‧‧‧ drive disk

14‧‧‧

15‧‧‧ drive teeth

151‧‧‧ oblique side

2‧‧‧ Input parts

3‧‧‧Action components

4‧‧‧ Cover

500‧‧‧ brake mechanism

5, 5a‧‧‧ elastic pad

51, 531‧‧‧Soft joints

52‧‧‧Slip

53‧‧‧Support cushion body

6‧‧‧ Fixing frame

7‧‧‧ Output parts

71‧‧‧ cam

710‧‧‧ outer edge

72, 72a‧‧‧Accepted convex teeth

720‧‧‧ inside

721, 721a‧‧‧hard edges

722a‧‧‧Depression

723, 723a‧‧‧ edge

73‧‧‧ Drive the ratchet

75‧‧‧First rectangular body

76‧‧‧Second rectangular body

8‧‧‧Act

81‧‧‧ inner edge

9‧‧‧Rolling set

91‧‧‧Rolling

A‧‧‧ touch points

L‧‧‧ load direction

1 is an exploded perspective view of a first embodiment of a brake mechanism of the present invention and a clutch mechanism.

Figure 2 is a perspective view of the present invention in partial combination according to Figure 1;

Figure 3 is a perspective view of the present invention in accordance with Figure 1 after being fully assembled.

4 is a top plan view of the first embodiment of the brake mechanism of the present invention in a braked state.

Figure 5 is a cross-sectional view of the present invention in accordance with Figure 4.

Fig. 6 is a schematic view showing the operation of the first embodiment of the brake mechanism of the present invention when the brake is released.

Figure 7 is a schematic view 2 of the operation of the present invention in accordance with Figure 6.

Figure 8 is a schematic view 3 of the operation of the present invention in accordance with Figure 7.

Figure 9 is a schematic view 4 of the operation of the present invention in accordance with Figure 8.

Figure 10 is a plan view of the second embodiment of the brake mechanism of the present invention in a braked state.

The detailed description and technical content of the present invention are set forth below with reference to the accompanying drawings.

The present invention provides an improved brake mechanism for a seat height adjusting device, which is mainly used for a height adjustment device such as a car seat, a massage chair or a wheelchair. As shown in FIG. 1, the height adjustment device includes a clutch mechanism 100 and a brake mechanism 500 disposed coaxially with each other. The clutch mechanism 100 includes an input member 2, a plurality of action components 3, a cover 4, and is shared with the brake mechanism 500 of the present invention. A drive plate 1 having a recessed portion (not shown) for accommodating the input member 2 and the action assembly 3 on the side not shown in the figure, the cover 4 corresponding to the recess cover of the drive plate 1 In response, the input member 2 is controlled to rotate by a control (not shown) to drive the drive disc 1 to rotate via the action assembly 3. The seat height adjusting device is fixed to the seat and drives the brake mechanism 500 to engage with a lifting mechanism mounted in the seat.

As shown in FIG. 1 to FIG. 5, the first embodiment of the brake mechanism 500 of the present invention comprises a plurality of elastic pads 5, a fixing frame 6, an output member 7, a ring body 8, a plurality of roller sets 9, and a driving plate. 1. its The drive disk 1 is shared with the clutch mechanism 100 and has a disk surface 14 which is hollow and has an inner edge 81. The drive disk 1 is covered by one side of the ring body 8.

The output member 7 is rotatably disposed in the ring body 8, and includes a cam 71 and a driving ratchet 73 that are coaxially connected to each other. A plurality of driven convex teeth 72 are protruded from the outer edge 710 of the cam 71. At this time, as shown in FIG. 5 and in conjunction with FIG. 4, the respective movable protruding teeth 72 are located between the outer edge 710 and the inner edge 81 which are spaced apart from each other. Preferably, as shown in FIG. 4 and in conjunction with FIG. 1, the cam 71 is a rectangular body having four sides (not labeled with component symbols), and any two adjacent sides are connected by a rounded corner (not labeled with a symbol). The driven protruding teeth 72 respectively protrude from the two rounded corners of the four sides and form a cross-shaped configuration.

Each of the driven teeth 72 has two hard joints 721 and one end edge 723 connected between the two hard joints 721. Preferably, the driven convex teeth 72 are in the form of a rectangular body or a rectangular thick body. Therefore, the two rigid joints 721 of each of the driven protruding teeth 72 are straight and spaced apart from each other, and are connected to the second. The end edge 723 between the same end of the hard joint 721, the shape of the driven convex tooth 72 will be like the letter U, but the joint between the hard joint 721 and the end edge 723 is not necessarily rounded, and each The one end edge 723 is in a stationary state (referred to as a stationary braking state) adjacent to the inner edge 81.

A plurality of elastic pads 5 and a plurality of roller sets 9, both disposed between the outer edge 710 and the inner edge 81, are described below.

Regarding the elastic pad 5, the present invention does not limit the structure of the elastic pad 5 and the arrangement thereof, as long as each elastic pad 5 can be disposed corresponding to each of the driven protruding teeth 72 and has two soft joints 51 respectively protruding from the two rigid joints 721. In this embodiment, the following description will be taken as an example: each elastic pad 5 is surface-to-facely overlapped on the inner surface 720 of each of the driven protruding teeth 72 (see FIG. 1) and the disk surface 14 of the driving disk 1 (see Between FIG. 1), the width of each elastic pad 5 is slightly larger than the width of each of the driven convex teeth 72, so that the two soft joints 51 are slightly protruded from the two hard joints 721, respectively. Preferably, the elastic pad 5 is also in the form of a rectangular body or a rectangular slab, so that the two soft edges 51 of each elastic pad 5 are also straight and spaced apart from each other; The 5 series and the convex teeth 72 of the same shape are superposed on each other face to face, so that the two soft joints 51 are substantially parallel to the two hard joints 721, respectively, which is advantageous for The operation setting of soft contact and hard contact first. In addition, the thickness sum of each of the elastic pads 5 and each of the driven convex teeth 72 after being face-to-face overlapping each other is close to (or equal to or slightly larger than) the thickness of the cam 71, so that the elastic pad 5 is elastically clamped to the driven convex. The inner surface of the tooth 72 is between the inner surface of the drive disk 1.

The elastic pad 5 is an elastic pad body which can be elastically deformed or can be elastically concave. Each of the abutting edges of each of the elastic pads 5 may also be provided with at least one stopping slip 52, for example, between each elastic pad 5 and the disk surface 14 and between the inner surface 720 of each of the driven protruding teeth 72. And a sliding stud 52 is provided between the inner edge 81 and the inner edge 81 to increase the friction between the elastic pad 5 and the disk surface 14, the inner surface 720 and the inner edge 81.

Regarding the roller group 9, the present invention does not limit the structure of the roller group 9 and the arrangement thereof. In the present embodiment, the description includes the two rollers 91 as an example, and the two rollers 91 of each roller group 9 The two soft joints 51 of the respective elastic pads 5 are respectively adjacent to or in soft contact with each other, and the two rollers 91 of the roller sets 9 are correspondingly disposed between the respective driven convex teeth 72 and the aforementioned rounded corners. position. In detail, each of the roller groups 9 can be driven by the pushing of the driving disk 1 or the pushback of the elastic pad 5 to brake between the outer edge 710 and the inner edge 81, or to loosen the outer edge. The brake is released between 710 and the inner edge 81.

One side of the driving plate 1 has a plurality of driving teeth 15 respectively extending between the adjacent two roller groups 9 so that the driving teeth 15 can push the roller 91 and can push each through the roller 91 The driven protruding teeth 72 move, which in turn drives the output member 7 to rotate. Preferably, each of the driving teeth 15 has two oblique sides 151 which are arranged side by side and are inclined with respect to each other, and the inclination angles of the two oblique sides 151 of the driving teeth 15 correspond to the diameter of the driving disk 1 (refer to FIG. 6). ), that is, parallel to the diameter of the drive disc 1 to facilitate pushing the roller 91 to move in a specific direction.

Therefore, when the driving disk 1 is actuated, the driving teeth 15 move the roller 91 of each roller group 9 with its oblique side 151, and are moved toward the adjacent rigid edges 721 of the respective receiving protruding teeth 72, respectively. .

The fixing frame 6 covers the other side of the ring body 8 and is clamped to the ring body 8 and the outer cover 4 to be combined into a seat height adjusting device. The seat height adjusting device can be fixed to the seat by the fixing frame 6, so that the fixing frame 6 and the ring body 8 and the outer cover 4 which are clamped by the fixing frame 6 cannot rotate, and the driving ratchet 73 of the output member 7 can be driven. It is driven by the lifting mechanism installed in the chair.

As shown in Figure 6, it is a stationary brake state. At this time, each of the rollers 91 is locked between the inner edge 81 and the outer edge 710 to brake, and a first gap S1a exists between the edge 723 and the inner edge 81 of each of the driven teeth 72, and each The first gap S1a is greater than zero in the static state (referred to as the stationary braking state), and there is a second gap S2a between each roller 91 and the outer edge 710, and each second gap S2a is present here. It is equal to zero in the static state.

As shown in Fig. 7, the initial operation control (not shown) drives the drive disk 1 to rotate and the output member 7 is slightly moved by the external load. When the drive disc 1 is rotated together with the drive teeth 15, the bevel 151 of each drive tooth 15 will contact one of the rollers 91 of each roller set 9 to create a contact point A; each drive tooth 15 then utilizes each contact Point A pushes each roller 91, and each of the rollers 91 after being pushed will initially press one of the soft joints 51 of each of the elastic pads 5 to be recessed, and the respective rollers 91 after being moved away from the outer edge 710, At this time, the second gap S2b is greater than zero to release the brake, and the second gap S2b at this time is greater than the first gap S1a and the first gap S1a is still greater than zero (not shown in the drawings, as shown in FIGS. 6 and 7).

Then, as shown in FIG. 7, when the second gap S2b is released from braking as described above, the brakes are released, or when the driven rollers 91 continue to push the soft joints 51, the external load is at this time ( At least one of the weight of the chair itself or the weight of the occupant, etc., generates a load direction L in the seat height adjusting device, and is located at least below the axis of the output member 7 (not labeled with the component symbol) after the brake is released. The driven convex tooth 72 slightly moves toward the load direction L due to the external load, so that the end edge 723 directly abuts the inner edge 81 to make the first gap S1b equal to zero, that is, at least one driven convex tooth 72 will be present at this time. The end edge 723 abuts against the inner edge 81, and therefore, the second gap S2b is also larger than the first gap S1b (in this case, S1b=0); The end edge 723 of the other driven convex teeth 72 (for example, the two driven convex teeth 72 above the axial center) is relatively far from the inner edge 81, so that the first gap S1c becomes slightly larger (in this case, S1c>S1a).

When the roller 91 is moved and the soft joint 51 is initially pressed, the roller 91 is first softly contacted with the soft joint 51; when the driven roller 91 continues to push the soft joint 51 further. When recessed, the roller 91 will directly contact the hard joint 721 to push the driven tooth 72.

As shown in Fig. 8, in order to continue the operation control, the same direction is rotated to the bottom. When the driving teeth 15 continue to push the rollers 91, the driven rollers 91 will continue to push the soft joints 51 to further recess and directly contact the hard joints 721, and the second gap (not labeled) The component symbol) will be greater than or equal to the aforementioned second gap S2b, and each roller 91 will begin to push each of the driven teeth 72 to rotate until the control handle is operatively hit. Of course, the second gap S2b at this time is still larger than the first gap S1b (refer to FIG. 7).

As shown in Fig. 9, the reaction state when the control is released is released. When the user releases the control handle, the original soft joint 51 of each elastic pad 5 will elastically return to a flat shape and push the roller 91 back, so that the roller 91 is again clamped on the inner edge 81 and the outer edge 710. During this time, the brakes start to start. At the same time, the roller 91 of each roller set 9 will also push the clutch mechanism 100 back to the original position (not shown).

Through the operation of FIG. 6 to FIG. 9, the single adjustment operation of the seat height adjustment or lowering can be completed, and of course, the multiple adjustment operations of FIG. 6 to FIG. 9 can be repeated until the desired height is adjusted. .

In addition, it is noted that, as shown in FIG. 6, the output member 7 defines a rotation path (not labeled with a component symbol) formed by rotating each of the driven convex teeth 72 with the center of the cam 71 as an axis. And the center of the protruding length of each of the driven protruding teeth 72 and the axial center of each of the rollers 91 are located on the rotating path, and the driven rollers are driven in such a manner that the respective rollers 91 do not generate a component or reduce the component. 72.

The first embodiment of the present invention has the following effects as compared with the prior art:

1. Reduce wear and improve durability: when the brake is released, at least one of the driven protruding teeth 72 in the load direction L has its end edge 723 directly abutting against the inner edge 81, thereby sharing the original all by the roller. The external load that 91 is subjected to reduces the force of the roller 91 to reduce the wear, thereby improving the durability and ensuring smooth operation without failure.

2. The labor-saving operation effect is that the center of the protruding length of each of the driven protruding teeth 72 and the axis of each roller 91 are located on the aforementioned rotating path, so that the rollers 91 do not push the respective protruding teeth 72. Will reduce the production of force, thus achieving a labor-saving effect. Preferably, one end edge 723 of each of the driven protruding teeth 72 is adjacent to the inner edge 81 to further reduce the generation of component forces; preferably, the driving teeth 15 have two oblique sides corresponding to the diameter of the cam. 151, so that the driving teeth 15 can smoothly push the roller 91 to move in a specific direction, and the component force can be reduced or reduced.

3. Easy processing and easy integral molding: the shape of the driven protruding teeth 72 is changed to a simplified rectangular shape (or a rectangular thick sheet shape), so that it has an effect of easy processing, and is also easy to integrally form and has a collection of parts. Low price effect. Further, in terms of processing, for example, press working including forging can be employed, so that the processing cost can be reduced. Preferably, the shape of the elastic pad 5 is also changed to a simplified rectangular shape (or a rectangular thick plate shape). as well as

4. Comfortable operation feeling: the two soft joints 51 of the elastic pad 5 respectively protrude from the two hard joints 721 of the driven convex teeth 72, so as to have the soft touch and hard contact comfort during the height adjustment operation. Sexual operation feel.

As shown in Fig. 10, a second embodiment of the brake mechanism 500 of the present invention is shown. The second embodiment is substantially the same as the first embodiment described above, and the difference is only different between the elastic pad 52 and the driven convex tooth 72a, as described in detail below.

Each of the driven protruding teeth 72a has a convex shape and has the above-described two hard joints 721a and two recessed portions 722a that are retracted with respect to the two hard joints 721a. Preferably, the driven convex tooth 72a includes a first rectangular body 75 and a second rectangular body 76 which are stacked one above another at a high level and a low level (the shapes are still easy to process and are easy to integrally form), and the first rectangular body 75 There are two rigid joints 721a, and the two sides of the second rectangular body 76 are retracted relative to the two hard joints 721a to form two recessed portions 722a. Specifically, the two rigid joints of each of the driven protruding teeth 72a The 721a is protruded from the outer edge 710, and the end edge 723a of each of the driven protruding teeth 72a is correspondingly connected between the two recessed portions 722a. The end between each end edge 723a and the inner edge 81 is also the same as the first embodiment. The first gap of the example (refer to S1a in Fig. 6).

Each of the elastic pads 5a includes two supporting mats 53 which may be cylindrical or elliptical. The two supporting mats 53 are respectively received in the two recessed portions 722a, and the opposite outer sides of the supporting mats 53 of the elastic mats 5a respectively have One of the two soft joints 531, and the two soft joints 531 also protrude from the two rigid joints 721a, respectively.

Thereby, the second embodiment of the present invention also has all the effects of the foregoing first embodiment.

In summary, the improved brake mechanism of the seat height adjusting device of the present invention, whether in the first embodiment or the second embodiment, can achieve the intended use purpose and solve the defects of the prior art, and meet the requirements of the invention patent application. In accordance with the Patent Law, please apply for the patent in detail, so as to protect the rights of the inventor.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structural changes of the present invention and the contents of the drawings are all included in the present invention. Within the scope of the rights, it is given to Chen Ming.

Claims (11)

An improved brake mechanism for a seat height adjusting device includes: a ring body having an inner edge; an output member disposed in the ring body and including a cam, the outer edge of the cam protruding from each other a plurality of driven convex teeth connected to one end edge between the two rigid joints; a plurality of elastic pads and a plurality of roller sets disposed between the outer edge and the inner edge, each of the roller sets comprising a two-roller; and a driving disk, which is disposed along a longitudinal direction of the ring body, and each of the elastic pads is integrally disposed along the longitudinally facing surface between an inner surface of each of the driven protruding teeth and a disk surface of the driving plate. Having each of the elastic pads blocked by the respective movable teeth in the longitudinal direction and having two soft joints respectively protruding from the two hard edges along a lateral direction, the two rollers of each roller group along the transverse direction Adjacent to the two soft edges of each of the elastic pads; wherein, when the roller is moved and initially presses the soft joint in the lateral direction, the roller after being driven is first softly contacted with the roller a soft joint; when the driven roller continues to push the soft joint along the lateral direction to further recess, This roller will be directly in contact with the hard edge hardwired to push the movable teeth subject. The improved brake mechanism of the seat height adjusting device according to claim 1, wherein each of the elastic pads and each of the driven teeth are rectangular in shape and overlap each other face to face. The improved brake mechanism of the seat height adjusting device of claim 2, wherein the two soft edges of each of the elastic pads are straight and juxtaposed with each other, and the two hard teeth of each of the driven teeth are The edges are also straight and juxtaposed with each other. The improved brake mechanism of the seat height adjusting device of claim 1, wherein the sum of the thicknesses of each of the elastic pads and each of the driven convex teeth after being overlapped with each other is close to the thickness of the cam. The improved brake mechanism of the seat height adjusting device of claim 1, wherein the driving disk has a plurality of driving teeth respectively extending between the adjacent two roller groups in the longitudinal direction, each of the driving teeth having The two oblique sides are arranged side by side and arranged in a relatively inclined manner, and the driving teeth are moved along the lateral direction to push the roller toward the adjacent side of the hard joint. The improved brake mechanism of the seat height adjusting device of claim 1, wherein between the elastic pad and the disk surface of the drive plate, and between the inner surface of each of the driven teeth, and At least one stop slip is respectively disposed between the inner edges of the ring body. The improved brake mechanism of the seat height adjusting device of claim 1, wherein a first gap exists between each of the end edges and the inner edge, and the first gap is greater than zero in a stationary state; There is a second gap between the roller and the outer edge, and the second gap is equal to zero in the stationary state; when the roller is driven and just starts to push the soft joint in the lateral direction, the roller after being actuated The second gap between the shaft system and the outer edge will be greater than zero; when the driven roller continues to push the soft joint in the lateral direction, there is at least one of the driven teeth in the load direction. The end edge directly splices the inner edge such that the first gap is equal to zero, and the second gap is greater than the first gap that is equal to zero. The improved brake mechanism of the seat height adjusting device according to claim 7, wherein when the roller is actuated and the soft joint is initially pushed in the lateral direction, the roller and the outer cylinder after being actuated The second gap between the edges will be greater than the first gap and the first gap will still be greater than zero. The improved brake mechanism of the seat height adjusting device according to claim 1, wherein each of the driven convex teeth forms a rotation path with the center of the cam as an axis, a protruding length center of each of the driven convex teeth, and each of the rollers The axis of the shaft is located on the rotation path. The improved brake mechanism of the seat height adjusting device of claim 9, wherein the end edge of each of the driven teeth is adjacent to the inner edge. The improved brake mechanism of the seat height adjusting device according to claim 1, wherein the cam is a rectangular body and has four sides, and any two adjacent sides are connected by a rounded corner, and each of the two is moved. The convex teeth respectively protrude from the two rounded corners of the four sides, and each of the rollers is disposed at a position between each of the driven convex teeth and each of the rounded corners.