KR100789641B1 - Pumping device for seat cushion of a vehicle - Google Patents

Abstract

A pumping device for a seat cushion of a vehicle is provided to realize smooth operation of the seat cushion by preventing sudden impact from occurring when a brake unit is released from a locking state. A pumping device for a seat cushion of a vehicle comprises an outer case(3) installed in the seat cushion, a lever bracket(7) having a bracket protrusion(7a), a connection drum(9) that rotates in the outer case, and a clutch unit(10) accommodated in the outer case to rotate the connection drum. A plurality of concentric supports are radially provided in a brake drum(30) connected to a brake shaft(20). A brake unit(40) is provided between a wedge surface of the brake drum and an inner peripheral surface of the outer case to rotate the brake drum. An elastic ring(50) is installed between the brake drum and the outer case. A friction plate(60) is provided between the connection drum and the brake drum to increase friction between the connection drum and the brake drum.

Description

Pumping device for seat cushion of a vehicle}

1 is a view for explaining the appearance of the seat to which the pumping device for vehicle seat cushion of the present invention is applied;

Figure 2 is an exploded perspective view showing the components of the pumping device for a vehicle seat cushion of the present invention,

3 is an assembled perspective front perspective view of the pumping device for a vehicle seat cushion of the present invention;

4 is a cross-sectional view taken along the line IV-IV of FIG. 3;

5 is a cross-sectional view taken along the line VV of FIG.

6 is a cross-sectional view taken along line VI-VI of FIG. 3;

7 and 8 are cross-sectional views for showing the operating state of the bracket projection and the spring operation projection in accordance with the lifting and lowering operation of the handle lever in the state of Figure 6,

9 is a sectional view showing the clutch means and the brake means;

10 is a cross-sectional view illustrating the relationship between the brake drum, the connecting drum and the brake means, the upper side showing a state in which no force is applied to the brake roller from the connecting drum, and the lower side showing a state in which a force is applied;

11 is a rear perspective view of the assembled state of the pumping device for a vehicle seat cushion of the present invention;

12 is a perspective view of the lever bracket,

13 and 14 are perspective views of the outer case,

15 is a perspective view of a clutch shaft,

16 is a perspective view of the clutch block,

17 and 18 are perspective views of the spring stopper block is installed clutch spring,

19 is a perspective view of a retainer assembly;

20 and 21 are perspective views of the connecting drum,

22 is a perspective view of a friction plate,

23 and 24 are perspective views of the brake drum,

25 is a perspective view of a brake means composed of a brake roller and an elastic member;

26 is a perspective view of a brake shaft,

27 is a perspective view of an elastic ring,

28 is a perspective view illustrating a state in which an elastic ring is assembled.

<Brief description of symbols for the main parts of the drawings>

1-Seat Cushion 3-Outer Case

5-Handle lever 7-Lever bracket

9-connecting drum 10-clutch means

11-Clutch Shaft 12-Clutch Block

13-spring stopper block 14-retainer assembly

15-clutch spring 20-brake shaft

30-Brake Drum 31-Concentric Supports

32-wedge surface 40-brake means

50-Elastic Ring 60-Friction Plate

61-Round 62-Protrusion

The present invention relates to a pumping device for a vehicle seat cushion, and more particularly, an apparatus for adjusting the height of the seat cushion and maintaining the adjusted height by operating a separate link mechanism installed in the seat cushion with an operation force provided by a user. Is about technology.

The conventional pumping device for a vehicle seat cushion is generally provided with two clutch mechanisms between the input shaft and the brake shaft, and a connecting drum is disposed between the two clutch mechanisms so that the user operates the handle lever and is neutral to the input shaft. When the operating force is applied in one direction from the side, the clutch mechanism on the input shaft side is locked to the connecting drum. When the connecting drum is slightly rotated by the operating force, the locking state of the clutch mechanism (hereinafter, the brake mechanism) on the brake shaft side becomes As a result, the connecting drum pivots the brake shaft so that the height of the seat cushion is adjusted. On the other hand, when the input shaft is restored to the neutral state, the brake mechanism is immediately locked, so that the height of the adjusted seat cushion is maintained.

Since the pumping device for a vehicle seat cushion as described above is directly operated by a user to adjust the height of the seat cushion, it is preferable that the user has excellent operation feeling.

In particular, when the user operates the handle lever while sitting on the seat, a torque in a direction of lowering the height of the seat cushion is applied to the brake shaft by the pressure pushing the seat cushion downward. When the steering wheel lever is operated in a direction of lowering the height of the seat cushion, as soon as the locking state of the brake mechanism is released by the torque, the brake shaft is rotated and a shocking operation tends to be performed.

In addition, in order to maintain a balance against the load of the user as described above, it is often configured to provide a reaction force with the spring, in this case, if the user operates the handle lever without sitting on the seat, the brake is likewise As soon as the locking state of the mechanism is released, the brake shaft is rotated and shocking operation is performed.

The present invention has been made to solve the problems described above, improves the concentricity between the components constituting the brake mechanism to improve the operation feeling by the smoothness and stability of the operation, by the torque pre-hung on the brake shaft It is an object of the present invention to provide a pumping device for a vehicle seat cushion which can prevent a shocking operation when the brake mechanism is released from the locking state, thereby realizing a smooth and luxurious operating feeling.

In addition, the pump seating apparatus for a vehicle seat cushion of the present invention is to reduce the number of parts of the clutch means to achieve a reduction in weight, manufacturing cost and compactness.

In addition, another object of the present invention, by adding a friction plate between the connecting drum and the brake drum to increase the friction between the connecting drum and the brake drum, and thus the return of the connection drum at the neutral state of the handle lever In order to suppress the return to the neutral state, it is possible to reduce the operating loss of the clutch means at the next operation of the handle lever as much as possible.

According to an aspect of the present invention, there is provided a pumping device for a vehicle seat cushion including: an outer case fixed to the inside of the seat cushion and having an inner circumferential surface; A lever bracket connected to the handle lever and rotatably installed with respect to the outer case and having a bracket protrusion penetrating the lever hole formed in the outer case; A connecting drum rotatably installed in the outer case; Clutch means accommodated in the inner space of the outer case and configured to rotate the connecting drum and return to its original position with the rotational force provided through the lever bracket; A brake drum radially provided with a plurality of concentric support parts contacting the inner circumferential surface of the outer case, and wedge surfaces are provided at both sides of the concentric support parts, and connected to a brake shaft; It is provided between the wedge surface of the brake drum and the inner circumferential surface of the outer case to suppress the rotation of the brake drum with respect to the outer case, and release the rotation suppression state of the brake drum by the rotation force provided by the connecting drum Brake means for rotating the brake drum; An elastic ring installed between the brake drum and the outer case to provide a constant rotational friction force; Installed between one surface of the flange of the connecting drum facing the brake drum and the concentric support of the brake drum to increase the friction force between the connecting drum and the brake drum and to restore the neutrality of the connecting drum when the handle lever returns to its neutral state. It characterized in that it comprises a; friction plate to suppress the return to the state.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 28, an embodiment of the present invention includes an outer case 3 fixed to the inside of the seat cushion 1 and having an inner circumferential surface; A lever bracket 7 connected to the handle lever 5 and rotatably installed with respect to the outer case 3 and having a bracket protrusion 7a penetrating through the lever hole 3a formed in the outer case 3. )and; A connecting drum 9 rotatably installed in the outer case 3; Clutch means (10) accommodated in the inner space of the outer case (3) and configured to rotate the connecting drum (9) with a rotational force provided through the lever bracket (7) and return to its original position; A plurality of concentric support parts 31 in contact with the inner circumferential surface of the outer case 3 is provided radially, the wedge surface 32 is provided on both sides of the concentric support part 31 and the brake drum connected to the brake shaft 20 30; It is provided between the wedge surface 32 of the brake drum 30 and the inner circumferential surface of the outer case 3 to suppress the rotation of the brake drum 30 with respect to the outer case 3, and the connection Brake means (40) for releasing the suppression of rotation of the brake drum (30) with the rotational force provided by the drum (9), and rotating the brake drum (30); An elastic ring 50 installed between the brake drum 30 and the outer case 3 to provide a constant rotational friction force; The connection drum 9 and the brake drum 30 are installed between one surface of the flange 9a of the connection drum 9 facing the brake drum 30 and the concentric support 31 of the brake drum 30. And a friction plate 60 which increases the frictional force therebetween and suppresses the return of the connection drum 9 to the neutral state when the handle lever 5 returns to the neutral state.

The outer case 3 is coupled to the cover plate 4 so as to embed the parts therein.

The lever bracket 7 is installed outside the outer case 3 and the bracket protrusion 7a integrally provided in the outer case 3 passes through the lever hole 3a formed in the outer case 3. The clutch means 10 is fitted into the first operation hole 13d of the spring stopper block 15 described later.

The outer case 3 has a shaft hole 3c through which one end of the clutch shaft 11 penetrates in a central portion thereof, and a plurality of projection holes 3b at radially spaced positions around the shaft hole 3c. Is formed, and one of the projection holes 3b is connected to the lever hole 3a.

The clutch means 10 has one end splined to the lever bracket 7 through the center of the outer case 3 and the lever bracket 7, and one end of the brake shaft 20 toward the inner center thereof. A clutch shaft 11 to be fitted; A clutch block 12 splined to the other end of the clutch shaft 11 and having a plurality of wedge surfaces 12a continuously formed along an outer circumferential surface thereof; A spring stopper block 13 fixedly installed inside the outer case 3 so as to contact one surface of the flange 9a of the connection drum 9 facing the outer case 3; A plurality of clutch rollers 14a which are inserted between the outer circumferential surface of the clutch block 12 and the connecting drum 9 and positioned between the wedge surface 12a and the connecting drum 9 of the clutch block 12. Retainer assembly 14 having a; The circumference of the spring stopper block 13 to impart an elastic restoring force to the rotation of the lever bracket (7) and at the same time give an elastic restoring force to the retainer assembly 14 rotated in conjunction with the lever bracket (7). It consists of a pair of clutch spring (15) which is fitted into the spring groove (13a) bisected in the direction.

Here, the spring stopper block 13, a plurality of engaging projections (13b) are formed so as to be fitted into the projection hole (3b) of the outer case (3) and two of the coupling projections (13b) facing each other A pair which is formed at a position spaced outward from the two engaging projections 13b and supports both ends of the clutch spring 15 inserted into the spring groove 13a together with the engaging projection 13b to serve as a stopper. A first operation hole 13d through which the stopper protrusion 13c, the coupling protrusion 13b, and the stopper protrusion 13c are cut in an arc shape, and the bracket protrusion 7a is fitted. And a second operation hole 13e formed in a shape similar to the first operation hole 13d at a position facing the first operation hole 13d.

In addition, the retainer assembly 14 includes a plurality of retainer protrusions 14b which are inserted into the spring stopper block 13 and protrude to contact the inner circumferential surface 13f, and the spring stopper block 13 is formed of the retainer assembly 14. And a spring operating projection 14c fitted into the two operating holes 13e.

Hereinafter, the operation of the clutch means will be described.

A state in which the bracket protrusion 7a of the lever bracket 7 fitted into the first operation hole 13d is not elastically affected by the pair of clutch springs 15, that is, a state as shown in FIG.

In the neutral state, the spring actuating protrusion 14c of the retainer assembly 14 fitted into the second actuation hole 13e is also not elastically affected by the pair of clutch springs 15.

The handle lever 5 of the neutral state is a state located in the middle of the vertical direction as shown in FIG.

One direction rotation of the lever bracket 7 from the neutral state is rotation in the direction of raising the seat cushion 1, and rotation in the opposite direction is rotation in the direction of lowering the seat cushion 1, as shown in FIG. As described above, when the operation of raising the handle lever 5 to the neutral state is repeated, the seat cushion 1 gradually rises, and if the operation of repeatedly lowering the handle lever 5 to the neutral state is repeated the seat cushion 1. ) Is supposed to descend gradually.

When the lever bracket 7 coupled to the handle lever 5 rotates as the handle lever 5 in a neutral state is raised or lowered, the clutch shaft 11 and the spline coupled to the lever bracket 7 and the The clutch block 12 and the spline-coupled clutch block 12 rotate integrally, and when the clutch block 12 rotates, the clutch roller 14a rotates with the connecting drum 9 as the wedge surface 12a rotates. It is sandwiched between the clutch block 12, the retainer assembly 14 and the connecting drum 9 is integrally rotated by the rotational force transmitted from the clutch block 12.

Here, when the handle lever 5 of the neutral state shown in FIG. 1 is raised to raise the seat cushion 1, the bracket projection 7a of the lever bracket 7 is the first operating hole 13d as shown in FIG. ) To the right to compress the clutch spring 15 on the right side, and at the same time the spring operation projection 14c of the retainer assembly 14 moves to the left along the second operation hole 13e and the clutch spring on the left side. (15) will be compressed.

On the contrary, when the handle lever 5 of the neutral state shown in FIG. 1 is lowered to lower the seat cushion 1, the bracket projection 7a of the lever bracket 7 has a first operating hole 13d as shown in FIG. To the left to compress the clutch spring 15 on the left side, and at the same time, the spring operation projection 14c of the retainer assembly 14 moves to the right along the second operation hole 13e to the right of the clutch spring. (15) will be compressed.

On the other hand, when the handle lever 5 in the up or down state is returned to the neutral state due to the release of the operating force of the user after the connecting drum 9 is rotated, the retainer assembly 14, the clutch block 12, and the clutch The shaft 11 is integrally rotated by the restoring force of the clutch spring 15 to return to the neutral state, and at the same time, the lever bracket 7 is also rotated separately by the restoring force of the clutch spring 15 to return to the neutral state.

Then, the rotational force of the connecting drum 9 is transmitted to the brake drum 30 through the brake means 40 so that the brake drum 30 rotates, and the connecting drum 9 in the rotated state is the friction plate 60. By the integration with the brake drum 30 is suppressed to return to the neutral state, a description thereof will be described below.

Meanwhile, a friction plate 60 according to the present invention is installed between the connection drum 9 and the brake drum 30, and the friction plate 60 is connected to the connection drum 9 and the brake drum 30. It increases the friction between).

The friction plate 60 integrates the connection drum 9 and the brake drum 30 when the handle lever 5 returns to the neutral state, thereby suppressing the return of the connection drum 9 to the neutral state. In addition, it serves to reduce as much as possible the operating loss of the clutch means 10 during the next operation of the handle lever (5).

The friction plate 60 for realizing this is a circular portion 61 formed in surface contact with the flange (9a) of the connecting drum (9), as shown in Figure 22, radially from the circular portion 61 It is formed of a plurality of protrusions 62 are formed to protrude so as to be in surface contact with the concentric support portion 31 of the brake drum (30).

The brake drum 30 radially forms a plurality of concentric support parts 31 as shown in FIGS. 23 and 24, and is inserted into the outer case 3 as shown in FIG. 10. In this case, the inner circumferential surface of the outer case 3 and the concentric support part 31 are in contact with each other, so that the concentricity of the brake drum 30 with respect to the outer case 3 can be firmly secured in a constant state.

As described above, when the brake drum 30 maintains a firm concentricity with respect to the outer case 3, a quieter and smoother operation is possible when the brake drum 30 rotates with respect to the outer case 3. In addition, the role of improving the user's operation feeling and the peripheral parts together with the peripheral parts will bring the effect of improving the durability of the pumping device for the vehicle seat cushion.

In this embodiment, the brake means 40 includes an elastic member 41 provided to provide an elastic force in a direction away from the concentric support portion 31, as shown in FIG. Between the wedge surface 32 of the brake drum 30 and the inner circumferential surface of the outer case 3 is supported by the elastic force provided by the elastic member 41, the concentric support portion 31 by the connecting drum (9) It is configured to include a brake roller 42 installed to be pressed toward the side.

The elastic member 41 is composed of a W-shaped leaf spring in which the center bent portion is fitted to the concentric support portion 31 as shown in FIG.

The concentric support portion 31 has a pillar portion 31a protruding radially from a portion where the wedge surface 32 of the brake drum 30 is formed, and a cross-sectional area is extended at an end portion of the pillar portion 31a. It comprises a wing portion 31b formed in an arc shape so as to be in surface contact with the inner peripheral surface of the outer case (3).

The wedge surface 32 of the brake drum 30 has a structure formed with an inclined surface away from the center of the brake drum 30 as it moves away from the concentric support portion 31.

The stopper protrusion 33 which restricts the movement of the brake roller 42 protrudes from the pillar portion 31a of the wedge surface 32 of the brake drum 30, and has a wing portion of the concentric support portion 31. 31 b) is provided with the stopper surface 31c which sets the limit which the said brake roller 42 approaches the pillar part 31a with the said stopper protrusion 33. As shown in FIG.

Therefore, when the brake roller 42 is pressed toward the pillar portion 31a of the concentric support portion 31, the elastic member 41 is excessively pressurized, so that the elastic member 41 is beyond the elastic deformation limit. It is to prevent the phenomenon that deformation occurs.

With reference to Figure 10 looks at the action of the brake means.

Here, it is assumed that the user's handle lever 5 operating force acts in the direction of lowering the seat cushion 1, and the direction of the operating force is assumed to be counterclockwise in FIG.

Before the user's operating force is applied, as shown in the upper side of FIG. 10, the brake roller 42 is formed by the elastic member 41 and the wedge surface 32 and the outer case 3 of the brake drum 30. It is sandwiched between the inner circumferential surface of the, the brake drum 30 with respect to the outer case 3 is in a locking state that can not be rotated in any direction.

When the connecting drum 9 is rotated counterclockwise by the clutch means 10 by a user's operating force, the connecting drum 9 pushes the brake roller 42 toward the concentric support part 31 to brake the brake. The locked state is released so that the drum 30 can be rotated counterclockwise.

Subsequently, when the connecting drum 9 is rotated a little further, as shown in the lower side of FIG. 10, the brake roller 42 eventually comes into contact with the stopper protrusion 33 and the stopper surface 31c. The rotational force provided by the connecting drum 9 is transmitted to the brake drum 30 through the brake roller 42 and the concentric support 31, so that the brake drum 30 is rotated.

The brake shaft 20 is coupled to the brake drum 30 by a spline. As a result, the brake shaft 20 is rotated, thereby operating a separate link mechanism embedded in the seat cushion 1 so as to operate the seat cushion 1. ) To rise.

On the other hand, the connecting drum 9 in the rotated state is integrated with the brake drum 30 by the friction plate 60, and thus the connecting drum 9 in the rotated state is returned to the neutral state of the handle lever 5. Together with the brake drum 30, the return to the neutral state is suppressed.

Therefore, the operation of the clutch means 10 immediately proceeds at the next operation of the handle lever 5, thereby reducing the operating loss of the clutch means 10 as much as possible.

Conventionally, the brake drum 30 is configured to release the locked state with respect to the outer case 3 and the brake drum 30 is rotated with respect to the outer case 3 as described above. In the present invention, as described above, the function of releasing the locked state of the brake drum 30 and the function of rotating the brake drum 30 have the same configuration, thereby simplifying the manufacturing process of the pump seating device for a vehicle seat cushion, and also in operation. Compared with the sequential operation by separate components, the continuous operation by a single configuration has the effect of improving the operating efficiency.

On the other hand, the present invention further comprises an elastic ring 50 provided to provide a constant rotational friction force between the brake drum 30 and the outer case (3).

The elastic ring 50 in this embodiment is provided with at least two or more engaging projections 51 coupled to the brake drum 30, as shown in Figure 27, a plurality of bends are repeated along the circumferential direction It was formed to be configured so that the outer surface is pressed on the inner peripheral surface of the outer case (3).

Of course, the brake drum 30 is provided with a coupling hole 35 into which the coupling protrusion 51 is inserted.

The elastic ring 50 is coupled as shown in Figure 24, is rotated with the brake drum 30, providing an elastic force to press the inner peripheral surface of the outer case 3 to the inner peripheral surface of the outer case (3) A frictional force is always applied between and.

The elastic ring 50 as described above acts when the brake roller 42 is moved by the rotation of the connecting drum 9 so that the locking state of the brake drum 30 with respect to the outer case 3 is released.

That is, when the locked state of the brake drum 30 is released as described above, the torque acting on the brake shaft 20 by the load of the person sitting on the seat cushion 1, or maintaining the balance with respect to the torque is maintained. The brake drum 30 is prevented from shockingly rotating the brake shaft 20 and the brake drum 30 unlike the user's intention by the torque provided by the reaction force.

Even when the connecting drum 9 moves the brake roller 42 to release the locked state of the brake drum 30, the brake drum 30 is the outer case due to the friction force acting on the elastic ring 50. With respect to (3), the abrupt rotation operation is not performed, and the rotation is performed only by the operating force provided by the user.

Therefore, the pumping device for a vehicle seat cushion of the present invention can provide a smooth and quiet operation feeling to the user's operation.

In addition, the pumping apparatus of the embodiment of the present invention is a configuration in which the elastic rotation of the lever bracket 7 and the elastic rotation of the retainer assembly 14 are made by the clutch spring 15 corresponding to the common component, the conventional lever bracket (7) Elastic rotation of the) and the elastic rotation of the retainer assembly 14 can reduce the number of parts of the clutch means 10, compared to the technology consisting of a separate spring, thereby reducing the weight and manufacturing cost and compactness There are also advantages that can be achieved.

In addition, in the present invention, the connection drum 9 is rotated when the handle lever 5 returns to the neutral state by the friction plate 60 installed between the connection drum 9 and the brake drum 30. By restraining the return to the neutral state with the 30, there is also an advantage that the operation loss of the clutch means 10 at the next operation of the handle lever 5 can be reduced as much as possible.

According to the present invention as described above, by improving the concentricity between the components constituting the brake mechanism to improve the operation feeling by the smoothness and stability of the operation, the shock is released when the locking mechanism of the brake mechanism by the torque pre-hung on the brake shaft By preventing the operation is made, there is an effect that can realize a smooth and elegant operating feeling.

In addition, according to the present invention, the weight reduction, manufacturing cost, and compactness can be realized by reducing the number of parts of the clutch means, and at the next operation of the handle lever by a friction plate provided between the connecting drum and the brake drum. There is also an effect to reduce the operating loss of the clutch means.

Claims (5)

An outer case 3 fixed inside the seat cushion 1 and having an inner circumferential surface; A lever bracket 7 connected to the handle lever 5 and rotatably installed with respect to the outer case 3 and having a bracket protrusion 7a penetrating through the lever hole 3a formed in the outer case 3. )and; A connecting drum 9 rotatably installed in the outer case 3; Clutch means (10) accommodated in the inner space of the outer case (3) and configured to rotate the connecting drum (9) with a rotational force provided through the lever bracket (7) and return to its original position; A plurality of concentric support parts 31 in contact with the inner circumferential surface of the outer case 3 is provided radially, the wedge surface 32 is provided on both sides of the concentric support part 31 and the brake drum connected to the brake shaft 20 30; It is provided between the wedge surface 32 of the brake drum 30 and the inner circumferential surface of the outer case 3 to suppress the rotation of the brake drum 30 with respect to the outer case 3, and the connection Brake means (40) for releasing the suppression of rotation of the brake drum (30) with the rotational force provided by the drum (9), and rotating the brake drum (30); An elastic ring 50 installed between the brake drum 30 and the outer case 3 to provide a constant rotational friction force; The connection drum 9 and the brake drum 30 are installed between one surface of the flange 9a of the connection drum 9 facing the brake drum 30 and the concentric support 31 of the brake drum 30. Friction plate 60 to increase the friction force between the suppression of the return to the neutral state of the connecting drum (9) when the handle lever (5) to return to the neutral state; Pump seating device for a vehicle seat cushion comprising a. The method according to claim 1, wherein the clutch means 10, A clutch shaft 11 having one end splined with the lever bracket 7 through the center of the outer case 3 and the lever bracket 7 while one end of the brake shaft 20 is fitted into the inner center thereof. Wow; A clutch block 12 splined to the other end of the clutch shaft 11 and having a plurality of wedge surfaces 12a continuously formed along an outer circumferential surface thereof; A spring stopper block 13 fixedly installed inside the outer case 3 so as to contact one surface of the flange 9a of the connection drum 9 facing the outer case 3; A plurality of clutch rollers 14a which are inserted between the outer circumferential surface of the clutch block 12 and the connecting drum 9 and positioned between the wedge surface 12a and the connecting drum 9 of the clutch block 12. Retainer assembly 14 having a; The circumference of the spring stopper block 13 to impart an elastic restoring force to the rotation of the lever bracket (7) and at the same time give an elastic restoring force to the retainer assembly 14 rotated in conjunction with the lever bracket (7). A pair of clutch springs 15 fitted into spring grooves 13a bisected in directions; Pump seating device for a vehicle seat cushion, characterized in that consisting of. The method according to claim 2, The spring stopper block 13, A plurality of coupling protrusions 13b protruding to be inserted into and coupled to the protrusion holes 3b of the outer case 3; Both ends of the clutch spring 15 formed at a position spaced outwardly from two coupling protrusions 13b facing each other among the coupling protrusions 13b and inserted into the spring groove 13a together with the coupling protrusion 13b. A pair of stopper protrusions 13c supporting the support and serving as a stopper; A first operation hole 13d through which the bracket protrusion 7a is inserted while being cut in an arc shape while penetrating between the coupling protrusion 13b and the stopper protrusion 13c; A second operation hole (13e) formed in a shape similar to the first operation hole (13d) at a position facing the first operation hole (13d); Vehicle seat cushion pumping device characterized in that it further comprises. The method of claim 3, wherein the retainer assembly 14, A plurality of retainer protrusions 14b inserted into the spring stopper block 13 and protruding to contact the inner circumferential surface 13f; A spring operation protrusion 14c fitted into the second operation hole 13e of the spring stopper block 13; Vehicle seat cushion pumping device characterized in that it further comprises. The method according to claim 1, wherein the friction plate 60, A circular portion (61) formed in surface contact with the flange (9a) of the connecting drum (9); A plurality of protrusions 62 protruding radially from the circular portion 61 to be in surface contact with the concentric support portion 31 of the brake drum 30; Pump seating device for a vehicle seat cushion, characterized in that consisting of.

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