TWM536173U - Brake mechanism of seat height adjustment device - Google Patents

Description

Brake mechanism for seat height adjustment device

The present invention relates to a brake mechanism, and in particular to a brake mechanism having a seat height adjustment device with a labor-saving function.

The height adjustment device for the seat, such as a height adjustment device mounted on the seat of the automobile, or a height adjustment device such as a massage chair or a wheelchair, is mainly used to adjust the height of the seat to suit different heights. Take the seat.

A lifting mechanism is arranged in the seat, the height adjusting device is disposed on one side of the seat and connected to the lifting mechanism, and a control lever is connected to the high and low adjusting mechanism to enable the user to pull up or push the control handle downwards The height adjustment device controls the lifting mechanism to lift and lower, thereby achieving the purpose of adjusting the height of the seat.

The height adjustment device includes a clutch mechanism and a brake mechanism that are coaxially arranged with each other, and the control handle is coupled to the clutch mechanism. Wherein, the existing clutch mechanism comprises: a driving member (shared with the braking mechanism), an input member disposed in the groove of the driving member, a plurality of first control components, and a cover corresponding to the driving member, and is controlled The control input member is rotated; as shown in FIG. 1 , the existing brake mechanism includes: a brake ring A1, an output member A2 disposed in the brake ring, a plurality of second control assemblies A3, and a drive member covering the brake ring. (shared with the clutch mechanism), wherein the driving member protrudes from a plurality of driving legs A4 (in a triangular prism shape), and each driving leg protrudes between any two adjacent second control components.

The height adjustment device is operative to control the rotation of the drive member via the clutch mechanism.

As shown in FIG. 1 , after the driving member belt rotates together with the driving leg A4 , each driving leg will contact one of the second control components to generate a contact point A; each driving leg; Each roller is pushed through the contact point A, and each roller A31 contacts a convex tooth (hereinafter referred to as a driven convex tooth A21) on the periphery of the output member to generate a contact point B, so that each roller is engaged with the driven convex by the contact point B. The teeth are favorable for driving; therefore, when the control handle is continuously rotated, the output member A2 can be driven to rotate together; since one axial end of the output member is engaged with a lifting mechanism mounted in a car seat, a massage chair or a wheelchair, etc., The height can be adjusted by controlling the seat, massage chair or wheelchair via the lifting mechanism.

However, in the actual operation, the existing brake mechanism will be driven by the inclined surface of the driving foot A4, and the driven convex tooth A21 is moved by the irregular surface, so there is a laborious lack, as follows:

It is assumed that the torque that causes the driving member to rotate after the operation control is rotated is M1.

The operating force applied to the contact point A by the driving foot A4 is set to F1 (the direction in which the driving foot pushes the roller A31), and the distance from F1 to the rotational axis X of the output member is L1 (force arm), then: Ml= Fl* Ll.

The operating force applied to the contact point B by the roller A31 is Fp (the direction in which the roller pushes the driven convex tooth A21), and the distance from the Fp to the rotational axis X is Lp (force arm), and Fp is applied to the driven convex tooth. The torque provided is Mp=Fp*Lp.

Since Fl>Fp (Fp=Flcosθ, the larger the angle θ, the closer cosθ is to 0), and L1>Lp, so Ml>>Mp.

In other words, when the operation control applies a force to cause the moment M1, the moment Mp actually transmitted to the driven convex tooth A21 will be much smaller than M1, thus causing the user to be more laborious when operating the control handle, which is ill for a long time. Long time.

The purpose of this creation is to provide a brake mechanism for a seat height adjustment device having a labor-saving function.

In order to achieve the above object, the present invention provides a brake mechanism for a seat height adjusting device, comprising: a ring body; an output member rotatably disposed in the ring body and including a cam and a majority of the protrusion from the cam a key, each of the driven keys having two first planar portions parallel to each other; a plurality of motion components disposed between an outer edge of the cam and an inner edge of the ring body, each of the motion components including an elastic member and a pair of rolling a circular shaft, each of the pair of rolling circular shafts being respectively located between any two adjacent movable keys, wherein each of the elastic members is disposed corresponding to the two first planar portions of each of the driven keys; and a driving disk corresponding to each of the moving components The driving body has a plurality of driving keys, and each of the driving keys extends between the pair of rolling circular axes and has two second planar portions parallel to each other, and each of the driving keys can drive each of the moving components to form a The driving direction, each of the first planar portion and each of the second planar portions are located in the driving direction.

Compared with the prior art, the present invention has the following effects: the driving key can push the rolling circular axis with its second planar portion, and the driven key can be indirectly driven by the first planar portion by the rolling circular axis, so as to come from The force applied by the user can be reliably transmitted, so that the user can have a relatively labor-saving effect during operation.

The detailed description and technical content of the present invention are described below with reference to the drawings, but the drawings are provided for reference and description only, and are not intended to limit the creation.

The present invention provides a brake mechanism for a seat height adjustment 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. 2, the height adjustment device includes a clutch mechanism 100 and a brake mechanism 500 disposed coaxially with each other, wherein the clutch mechanism 100 includes an input member 2, a plurality of action components 3, a cover 4, and the present brake mechanism 500. A driving disk 1 is shared. The driving disk 1 has a recessed portion (not shown) for accommodating the input member 2 and the active component 3, and the outer cover 4 corresponds to the recess of the driving disk 1. In the cover, the input member 2 is controlled to rotate by a control lever (not shown) to drive the drive disc 1 to rotate via the action assembly 3. The seat height adjusting device is fixed to a car seat, a massage chair, a wheelchair, etc., and the braking mechanism 500 is brought into engagement with a lifting mechanism mounted in a car seat, a massage chair, a wheelchair, or the like.

As shown in FIG. 2, FIG. 3, FIG. 4 and FIG. 5, the brake mechanism 500 of the present invention comprises a plurality of action components 5, an output member 7, a ring body 8, and a drive plate 1 shared with the clutch mechanism 100, preferably. A holder 6 is included, as detailed below.

Since the ring body 8 is hollow, it has an inner edge 81, and the ring body 8 is caught by the retainer 6 (described later) and cannot be rotated.

The output member 7 is rotatably inserted through the hollow portion of the ring body 8. The output member 7 includes a cam 71, a plurality of driven keys 72, and a driven gear 73. The cam 71 and the driven key 72 are provided at one end of the output member 7, and the driven gear 73 is disposed at the other end of the output member 7. Further, the outer edge 710 (see FIG. 5) of the cam 71 is spaced from the inner edge 81 of the ring body 8 so as to form a circumferentially spaced space S therebetween.

The outer edge 710 of the cam 71 has a plurality of protrusions 711, and each protrusion 711 has two limit positions (unsigned component symbols). Each of the driven keys 72 protrudes from the cam 71, and the number of the driven keys 72 is described by way of example in the present embodiment. Preferably, the four driven keys 72 are disposed in a cross shape on the outer edge of the cam 71. 710. Further, each of the driven keys 72 has two first flat portions 721 which are opposite to each other and are parallel to each other. The specific shape of the driven keys 72 is described by taking a rectangular shape as an example in the present embodiment.

The plurality of motion components 5 are circumferentially disposed in the above-mentioned space S, and the number of the motion components 5 is also described as an example in the present embodiment, so as to be respectively disposed on the four driven keys 72 arranged in a cross shape. between. Each of the action components 5 includes an elastic member 51 and a pair of rolling circular shafts 53. The pair of rolling circular shafts 53 are respectively located between any adjacent two driven keys 72, and each elastic member 51 corresponds to two first planar portions of the respective driven keys 72. 721 configuration. Moreover, the two rolling circular shafts 53 of the respective motion components 5 are respectively limited to the two limit positions of the respective protrusions 711 (see FIG. 5).

The elastic member 51 can be a spring or any other elastic member. In the present embodiment, the elastic cushion body is taken as an example, and the elastic cushion system has an effect of being easier to install than the spring. Each of the elastic members 511 has a plane portion that is symmetrical with each other, and each of the elastic mats 511 has a flat portion that is opposite to each other and parallel to each other. In this embodiment, each of the elastic mats 511 is also in a rectangular shape (having three The plane portion is described as an example so that the two elastic pad bodies 511 can be respectively abutted against the two first plane portions 721 of the driven key 72 at the plane portion thereof.

The driving disk 1 has a plurality of driving keys 15, and the number of the driving keys 15 is also described by taking four examples in this embodiment. Each of the driving keys 15 has two second planar portions 151 which are opposite to each other and are parallel to each other. In the present embodiment, each of the driving keys 15 is also illustrated as a rectangular body.

Each of the driving keys 15 protrudes from the other surface of the driving plate 1 (that is, the disk surface 14 shown in FIG. 2), and each of the driving keys 15 is formed in a rectangular shape. This creation is not limited, and in this embodiment, each The drive key 15 will be described by taking an integral punching from the disk surface 14 and bending it.

The driving plate 1 is corresponding to one surface (not shown) of each of the operating components 5, so that the driving keys 15 extend between the pair of rolling circular shafts 53 (see FIG. 5), so that Each of the driving keys 15 can move each of the motion components 5 along the surrounding space S to form a driving direction D (see FIG. 5), and each of the first planar portion 721 and each of the second planar portions 151 are located in the driving direction D. In the above, the driving keys 15 can be moved by the second flat portion 151 to drive the rolling circular shaft 53. The rolling circular shaft 53 can push the elastic cushion body 511 so that the elastic cushion body 511 can be pressed by the flat portion. The first flat portion 721 is pushed to move the driven key 72, so that the drive unit 1 can drive the output member 7 to rotate.

As shown in FIG. 5, the two second planar portions 151 of the driving keys 15 respectively correspond to the two rolling circular axes 53 of the respective motion components 5, and the two first planar portions 721 of the respective driven keys 72 are opposite to each other. The circular shaft 53 is respectively scrolled via one of the elastic members 51 corresponding to one of the adjacent two motion assemblies 5 .

Specifically, the two first planar portions 721 of the respective movable keys 72, the two second planar portions 151 of the respective drive keys 15, and the two planar portions of the respective elastic pad bodies 511 intersect with the driving direction D at the same angle. The angle of intersection is preferably 90 degrees.

The fixing frame 6 is covered on the other side of the ring body 8, and the fixing frame 6 is clamped to the ring body 8 and the outer cover 4, so that the seat height adjusting device can be combined. The seat height adjusting device can be fixed to the car seat, the massage chair or the wheelchair by using 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 be rotated, and the output member is made. The driving gear 73 of 7 can be driven by being engaged with a lifting mechanism mounted in a car seat, a massage chair or a wheelchair.

As shown in FIG. 6, after the driving disk 1 is rotated together with the driving key 15, each driving key 15 will contact one of the rolling circular shafts 53 of each action component 5 to generate a contact point A; each of the driving keys 15 is via The contact point A pushes each of the rolling circular shafts 53, and each of the rolling circular shafts 53 contacts the elastic pad body 511 to generate a contact point B, thereby pushing the driven key 72 to move; therefore, when the control handle is continuously rotated, the driven key can be driven. 72 (i.e., output member 7) rotates together.

The power of the present brake mechanism 500 can be reliably transmitted during operation, and thus has a labor-saving effect, as described below:

Assuming that the operation control is rotated, the moment causing the drive disc 1 to rotate is M1.

The operating force applied to the contact point A by the drive key 15 is set to F1 (the direction in which the drive key 15 pushes the rolling circular shaft 53), and the distance from F1 to the rotational axis X of the output member 7 is L1 (force arm). :Ml=Fl* Ll.

The operating force applied to the contact point B by the rolling circular shaft 53 is Fp (the direction in which the rolling circular shaft 53 pushes the driven key 72 via the contact elastic pad body 511), and the distance from the Fp to the above-described rotating shaft center X is Lp (force arm) ), then the torque Mp=Fp*Lp provided by Fp to the driven key 72.

Since Fl ≒ Fp (Fp = Flcos θ, θ angle is small and cos θ approaches 1), and L1 ≒ Lp, Ml ≒ Mp .

In this way, when the operation control applies a force to cause the moment M1, the torque Mp actually transmitted to the driven key 72 is not much different. Therefore, the force applied by the user can be surely transmitted, that is, the user is operating. The control has a relatively labor-saving effect.

In addition, as shown in FIG. 7 and FIG. 8 , another elastic member in the creation is the elastic bushing 52 , and the elastic bushing 52 can be sleeved on the driven key 72 to have an easier installation effect than the foregoing elastic member 51 . . The elastic bushing 52 has two elastic pad bodies 521 which are opposite to each other and parallel to each other, and each of the elastic pad bodies 521 also has two second planar portions (not labeled with reference numerals) which are opposite to each other and are parallel to each other. In this embodiment, each elastic body The pad body 521 is also described by taking a rectangular shape as an example.

Each of the elastic bushings 52 is sleeved corresponding to each of the driven keys 72, so that the two elastic pad bodies 521 of the elastic bushings 52 can be respectively abutted against the two first plane portions 721 of the respective driven keys 72 by the second planar portion thereof. This achieves the same effect as the aforementioned elastic member 51.

In summary, the present invention has the following effects as compared with the prior art: the rolling circular shaft 53 can be pushed by the second flat portion 151 by the driving key 15, and the driven key 72 can be replaced by the first flat portion 721 thereof. The rolling circular shaft 53 is indirectly driven, so that the force applied from the user can be reliably transmitted, so that the user can have a labor-saving effect when the operation control braking mechanism 500 rotates, that is, the user can easily perform the seat. The height of the chair is adjusted.

In addition, the present invention has other functions: the elastic pad body 511, 521 also has two flat portions, and the two planar portions of the elastic pad bodies 511, 521 respectively abut the two first planar portions 721 of the driven key 72, The rolling circular shaft 53 is in contact with and pushed to the flat portion of the elastic pad bodies 511, 521, so as to have a more labor-saving effect. By replacing the spring with the elastic pad bodies 511, 521, when the action assembly 5 is mounted in the space S, the problem that the spring is inadvertently ejected during installation can be avoided, and thus the effect of easy installation is obtained. The driving key 15 is formed on the driving disk 1 by integral punching and bending molding to have an effect of being easier to manufacture than the conventional triangular driving leg (refer to FIG. 1).

The above is only a preferred and feasible embodiment of the present invention, and thus does not limit the scope of the patent of the creation, and the equivalent structural changes that are made by using the present specification and the contents of the schema are all included in the creation. Within the scope of the rights, it is given to Chen Ming.

100‧‧‧Clutching agency

1‧‧‧ drive disk

14‧‧‧

15‧‧‧Drive button

151‧‧‧ second plane

2‧‧‧ Input parts

3‧‧‧Action components

4‧‧‧ Cover

500‧‧‧ brake mechanism

5‧‧‧Action components

51‧‧‧Flexible parts

511‧‧‧elastic body

52‧‧‧Flexible bushing

521‧‧‧Elastic body

53‧‧‧Rolling round shaft

6‧‧‧ Fixing frame

7‧‧‧ Output parts

71‧‧‧ cam

710‧‧‧ outer edge

711‧‧‧

72‧‧‧Accepted keys

721‧‧‧ first plane

73‧‧‧Drive gear

8‧‧‧Act

81‧‧‧ inner edge

D‧‧‧ leads the way

S‧‧‧space

Fig. 1 is a schematic view showing the action of the brake mechanism in the conventional seat height adjusting device.

Figure 2 is an exploded perspective view of the height adjustment device of the creation seat.

FIG. 3 is a schematic perspective view of the creation according to FIG. 2 after partial combination.

FIG. 4 is a schematic perspective view of the creation according to FIG. 2 after complete assembly.

Figure 5 is a partial cross-sectional view of the brake mechanism of the present invention before the action.

Figure 6 is a schematic plan view of the brake mechanism after the action.

Figure 7 is a perspective view of another elastic member of the brake mechanism of the present invention.

Figure 8 is a partial cross-sectional view of the prior art brake mechanism using another elastic member.

1‧‧‧ drive disk

15‧‧‧Drive button

4‧‧‧ Cover

500‧‧‧ brake mechanism

5‧‧‧Action components

51‧‧‧Flexible parts

511‧‧‧elastic body

53‧‧‧Rolling round shaft

6‧‧‧ Fixing frame

7‧‧‧ Output parts

71‧‧‧ cam

72‧‧‧Accepted keys

73‧‧‧Drive gear

8‧‧‧Act

Claims (12)

A brake mechanism for a seat height adjusting device, comprising: a ring body; an output member rotatably disposed in the ring body and including a cam and a plurality of driven keys protruding from the cam, each of the driven keys having parallel to each other Two first planar portions; a plurality of motion components disposed between the outer edge of the cam and the inner edge of the ring body, each of the motion components including an elastic member and a pair of rolling circular axes, each of the pair of rolling circular axes Between each adjacent two of the driven keys, each of the elastic members is disposed corresponding to the two first planar portions of each of the driven keys; and a driving disk corresponding to each of the motion components covering the ring body and having a plurality of driving keys Each of the driving keys extends between the pair of rolling circular axes and has two second planar portions parallel to each other, and each of the driving keys can move each of the motion components to form a driving direction, and each of the first planar portions And each of the second planar portions is located in the driving direction. The braking mechanism of the seat height adjusting device according to claim 1, wherein the two second planar portions of the driving keys are respectively corresponding to the two rolling circular axes of the motion components, and the driven keys are mutually The two first planar portions respectively correspond to the rolling circular axis of one of the adjacent two of the motion components via the elastic members. The brake mechanism of the seat height adjusting device of claim 1, wherein each of the elastic members comprises two elastic cushion bodies, and the two elastic cushion systems of each elastic member correspond to the two first planar portions of each of the driven keys. Don't lean on it. The brake mechanism of the seat height adjusting device according to claim 1, wherein the elastic member is an elastic bushing having two elastic pad bodies opposite to each other and parallel, each of the elastic bushings corresponding to each The two elastic pads of the elastic bushing respectively abut against the two first flat portions of the driven keys. The brake mechanism of the seat height adjusting device according to claim 3 or 4, wherein each of the elastic pad systems has a rectangular shape. The braking mechanism of the seat height adjusting device according to claim 1, wherein each of the driving keys has a rectangular shape. The braking mechanism of the seat height adjusting device according to claim 1, wherein the outer edge of the cam has a plurality of protrusions, and the pair of rolling circular shafts of each of the action components are respectively limited to two of the protrusions. The braking mechanism of the seat height adjusting device according to claim 1, wherein the number of the plurality of driving keys, the plurality of driven keys, and the plurality of motion components are set to four. The braking mechanism of the seat height adjusting device according to claim 8, wherein the four driven keys are disposed in a cross shape on an outer edge of the cam. The brake mechanism of the seat height adjusting device according to claim 1, further comprising a fixing frame covering a side of the ring body, the fixing frame covering the other side of the ring body, and the fixing The frame and the ring body are stuck to each other. The brake mechanism of the seat height adjusting device according to claim 1, wherein each of the elastic members has two elastic cushion bodies respectively corresponding to the two first flat portions of the driven keys, and the driving discs are driven by the driving One of the keys, the second planar portion pushes one of the rolling elements of each of the motion components, and one of the motion components of the motion component passes the one of the elastic pads to each of the driven keys One of the first planar sections is pushed. The braking mechanism of the seat height adjusting device according to claim 1, wherein the plurality of driving keys are integrally punched and bent from the driving plate.