KR101417523B1 - A pumping device of seat for a vehicle - Google Patents

Abstract

The present invention includes an output unit for transmitting an input torque to a link means of a seat cushion, a brake unit for restricting the operation of the output unit with respect to the torque input from the link means, and a housing for accommodating the brake unit therein, The brake unit includes a brake wedge which is coupled to rotate integrally with the output unit, a roller interposed between the outer peripheral surface of the brake wedge and the inner peripheral surface of the housing, and an elastic member which provides elastic force in one direction with respect to the roller, To a pumping device for a vehicle seat which generates an elastic force as the volume is reduced by pressing of a moving roller.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pumping device for a vehicle seat,

The present invention relates to a pumping device for a vehicle seat that operates a link means of a seat cushion with an operating force provided by a user to adjust the height of the seat and maintain the adjusted height.

Generally, a driver seat, an assistant seat and a seat for a passenger seat, which are installed in front and rear of a vehicle interior, are equipped with various conveniences for the comfort of passengers.

The convenience device is provided with a sliding function for adjusting the seat back and forth according to the body shape of the passenger, and a reclining function for adjusting the inclination of the seat with respect to the backrest.

In addition, as shown in FIG. 1, a vehicle to be released in recent years is provided with a pumping function for lifting and lowering the seat cushion 10 to adjust the height of the seat cushion 10 by receiving input from the handle lever 20, Device is provided.

The pumping device can largely be configured to include a lever unit, a clutch unit, an output unit, and a brake unit.

The lever unit receives the operation force of the user and transmits the received operation force to the clutch unit. The clutch unit transmits the input operation force (rotational force) of the user to the output unit, and the output unit transmits the transmitted torque to the link means of the seat cushion 10. The brake unit performs a function of blocking the reverse input torque and fixing the operated link means.

One specific example of such a pumping device is the pumping device disclosed in Korean Patent Publication No. 10-2011-0054714.

The pumping device disclosed in the above patent discloses a brake unit comprising a brake wedge and a roller assembly.

The roller assembly includes a pair of rollers and a spring disposed between the pair of rollers to provide an elastic force so that the pair of rollers are separated from each other. The pair of rollers are disposed between the outer peripheral surface of the brake wedge and the inner peripheral surface of the housing Thereby generating a strong frictional force due to the wedge action. The pumping device is prevented from reversing rotation of the brake wedge by the torque reversed from the link means by this frictional force.

When the seat height is adjusted, the clutch leg of the clutch drum included in the clutch unit rotates the brake wedge while moving the roller of the roller assembly in the rotating direction.

At this time, as described above, since the roller generates a strong frictional force due to the wedge action, vibration and noise are generated in the process of moving the roller in the rotating direction.

In order to solve this problem, the lubricant is applied to the roller, but since the roller is in line contact between the inner peripheral surface of the housing and the outer peripheral surface of the roller and the brake wedge, the lubricant is pushed as the roller moves, There is a problem that the performance of the pumping device is deteriorated because there is not sufficient lubricant on the friction surface.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pumping device for a vehicle seat that does not deteriorate performance without causing vibration and noise even if the roller is repeatedly moved.

In order to solve the above problems, a pumping device for a vehicle seat according to an embodiment of the present invention includes an output unit for transmitting an input torque to a link means of a seat cushion, And a housing accommodating the brake unit, wherein the brake unit includes: a brake wedge coupled to rotate integrally with the output unit, the brake wedge having an inclined surface formed on an outer circumferential surface thereof; A roller interposed between an inclined surface of the brake wedge and the inner circumferential surface of the housing to generate a frictional force with respect to the outer circumferential surface of the brake wedge and the inner circumferential surface of the housing as the tool moves in one direction to prevent the brake wedge from rotating; And an elastic member that provides an elastic force in the one direction with respect to the roller, wherein the elastic member is capable of generating the elastic force as the volume of the elastic member is reduced by pressing the roller moving in the other direction.

In the pumping device for a vehicle seat according to an embodiment of the present invention, the elastic member may include pores therein.

In the pumping device for a vehicle seat according to an embodiment of the present invention, the elastic member may include a lubricant inside the elastic member including the pores.

In a pumping device for a vehicle seat according to an embodiment of the present invention, the lubricant may include a grease.

In a pumping device for a vehicle seat according to an embodiment of the present invention, the elastic member may include a polyurethane material.

According to the present invention, the lubricant contained in the elastic member is discharged in the compression process of the elastic member and applied to the roller, and the applied lubricant lubricates the friction surface of the roller, thereby reducing vibration and noise when the roller is moved.

In addition, the lubricant that is pushed and moved along with the movement of the roller can be reabsorbed in the elastic member, and the reabsorbed lubricant is discharged again in the compression process of the elastic member and applied to the roller. Thus, since the lubricant can be reused, the lubrication function by the lubricant can be sustained, thereby greatly improving the durability of the pumping device.

1 is a view showing a seat of a vehicle,
2 is an exploded perspective view showing a pumping device according to an embodiment of the present invention,
3 is a cross-sectional view of a pumping device according to one embodiment of the present invention,
4 is a sectional view of the AA line shown in Fig. 3,
5 and 6 are sectional views showing the operation of the brake unit,
Fig. 7 is a sectional view showing the main part showing another example of the brake unit shown in Figs. 2 to 6. Fig.

Hereinafter, a pumping device for a vehicle seat according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an exploded perspective view showing a pumping device according to an embodiment of the present invention, FIG. 3 is a sectional view of a pumping device according to an embodiment of the present invention, FIG. 4 is a sectional view of the AA line shown in FIG. Fig. 6 is a main part sectional view showing the operation of the brake unit, and Fig. 7 is a main part sectional view showing another example of the brake unit shown in Figs.

2 to 4, a pumping device 1 for a vehicle seat according to an embodiment of the present invention includes an output unit 620 for transmitting an input torque to link means of a seat cushion, A brake unit for restricting the operation of the output unit 620 with respect to a reverse input torque, and a housing 200 for accommodating the brake unit therein, wherein the brake unit is integrally formed with the output unit 620 A brake wedge 610 having an inclined surface formed on an outer circumferential surface of the brake wedge 610 so as to be rotatable with respect to the outer circumferential surface of the brake wedge 610 and interposed between an outer circumferential surface of the brake wedge 610 and an inner circumferential surface of the housing 200, A roller 631 for generating a frictional force with respect to the outer circumferential surface and the inner circumferential surface of the housing 200 to prevent the brake wedge 610 from rotating, It may include an elastic member 632 providing an elastic force in a direction.

The output unit 620 serves to finally transmit the input torque to the link means (not shown) of the seat cushion 10 (see Fig. 1). The torque input to the output unit 620 is, for example, To the output unit.

To describe an example of such a torque input path, a clutch unit and the like that can be included in the pumping device will be described in advance of a specific description of the output unit 620. FIG.

The clutch unit, the brake unit, and the output unit can be housed in the housing. The housing can be fixed to the seat cushion 10, and the rotation is restricted as it is fixed.

The housing 200 shown as an example may have a space formed therein, a front surface closed, and an open rear shape. More specifically, the housing 200 may include a cylindrical body 201 and a flange portion 203 extending radially from the open rear outer peripheral surface of the body portion 201.

A shaft coupling portion 202 may be formed at the center of the front portion of the body 201 to be coupled to the output unit 620 to be described later so as to be rotatable. The shaft coupling portion 202 may have a hole formed therein through which the tip of the output unit 620 is inserted. The shaft coupling portion 202 may have a cylindrical shape protruding forward from the front portion of the body 201. The shaft coupling portion 202 penetrates the coupling hole 102 of the lever bracket 100 to be described later so that the lever bracket 100 can be disposed coaxially with the output unit 620 and supported. The shaft coupling portion 202 may be formed, for example, by burring the front surface portion of the body portion 201.

In the front part of the body part 201, three guide slots 201a may be formed on a circumference with the shaft coupling part 202 as a center.

The constraint member 500 to be described below may be provided with an elastic force for returning rotation, and elastic means may be used so that this elastic force is applied to the binder 500.

As a specific example of the elastic means, the illustrated example shows a clutch spring 130 including a ring-shaped body portion 131 and a pair of bending portions 132 formed at both ends of the body portion 131 have.

Any one of the guide slots 201a may be passed through the bending portion 132 of the clutch spring 130. [ Each end of each of the pair of bending portions 132 contacts both ends of a joining member 500 to be described later to transmit an elastic force to the joining member 500.

Specifically, any one of the pair of bending portions 132 is moved by being pushed by the one end of the frame assembly 500 as the frame assembly 500 to be described later rotates. At this time, the moving bending portion 132 is guided in the longitudinal direction of the first guide slot.

Since the other one of the pair of bending portions 132 is supported at the end of the first guide slot and does not move, a restoring force is generated in the process of the pair of bending portions 132 approaching each other . This restoring force acts as an external force that rotates the assembly 500 back and forth.

The three guide slots 201a can be penetrated by three connecting legs 251 formed on the connecting member 250, which will be described later. At this time, in the connecting leg 251 passing through the first guide slot, the bending portion 132 described above is positioned on both sides of the connecting leg 251. The connecting leg 251 passing through the three guide slots 201a can be guided to move along the longitudinal direction of the guide slot 201a and the connection leg 251 can be moved only by a predetermined length of the guide slot 201a The rotational angle of the connecting member 250 can be limited.

A plurality of fastening holes 203a may be formed in the flange portion 203 so as to be fixed to the seat cushion 10. [

The housing 200 is not limited in material. However, since the inner circumferential surface of the housing 200 is a wedge rubbing surface with respect to the roller 631 that can be included in a brake unit described later, a relatively large load can be applied to the housing 200. In consideration of this point, the housing 200 can be manufactured, for example, by pressing a plate made of a metal material, and can be heat-treated to have a constant strength.

The clutch unit can receive rotational force from the outside and can receive rotational force from the lever bracket 100 connected to the handle lever 20 (see FIG. 1). Specifically, the lever bracket 100 can be connected to the handle lever 20 which is rotated by the operation of the seat occupant. The lever bracket 100 is rotated together with the rotation of the handle lever 20 and the clutch block 300 to be described later included in the clutch unit can receive the rotational force from the lever bracket 100. [

A specific example of the lever bracket 100 will be described below.

The lever bracket 100 may be rotatably coupled to the front surface of the housing 200. The lever bracket 100 may include an example in which the bracket body 101 and the bracket leg 104 are included as shown.

In the illustrated example, the bracket body 101 may be arranged to overlap the front surface of the body part 201. [ The bracket body 101 may have a coupling hole 102 through which the shaft coupling portion 202 passes as described above. The shaft coupling portion 202 is coupled to the coupling hole 102, May be rotatably supported by the shaft coupling portion 202.

In addition, three leg slots 103 may be formed on the circumference with the coupling hole 102 as a center. The leg slot 103 may be coupled through the connecting leg 251. The leg slot 103 may have a structure in which the connecting member 250 and the lever bracket 100 are integrally rotated. At this time, as the rotational angle of the connecting member 250 is limited as described above, the rotational angle of the lever bracket 100 may also be limited.

The bracket legs 104 may be formed as a pair of bending portions formed on the outer circumferential surface of the bracket body 101.

First, when the operation of the handle lever 20 by the seated person is completed, the lever bracket 100 also needs to be rotated and rotated so that the handle lever 20 returns to rotate. Elastic means may be used to provide an elastic force to the lever bracket 100 to cause the lever bracket 100 to rotate back and forth. As an example of the resilient means, the annular return spring 160 shown may be used.

The return spring 160 may be coupled to the front portion of the body 201. The inner side surfaces of the pair of bracket legs 104 can be supported by being in contact with the outer surfaces of the pair of bent portions 161 formed at both ends of the return spring 160, respectively.

The pair of bent portions 161 can be supported by the pair of stopper portions 204 projecting forward from the front portion of the body portion 201 so that the spaces between the bent portions 161 are not extended any more .

When the lever bracket 100 is rotated in a state where the bracket leg 104 is in contact with the bent portion 161, any one of the pair of bent portions 161 is pressed by the bracket leg 104, . In this process, the return spring 160 generates a restoring force, and this restoring force can act as an external force that causes the lever bracket 100 to rotate backward.

The clutch unit may include a clutch block 300, a clutch drum 400, and a contractor 500.

The clutch block 300 may be accommodated in the housing 200 and may be rotated from the outside, for example, by receiving a rotational force from the lever bracket 100. The rotational force of the clutch block 300 may be transmitted to the clutch drum 400, which will be described later.

When the clutch block 300 receives rotational force from the lever bracket 100, the clutch block 300 and the lever bracket 100 are connected to each other. The clutch block 300 may be directly connected to the lever bracket 100 and may be connected by a connecting member 250 as shown in the illustrated example.

In the illustrated example, the clutch block 300 may be formed with a spline portion 301 protruded frontward on the front surface of the clutch block 300 so as to be coupled with the connecting member 250, The outer circumferential surface may be formed with a spline.

The coupling member 250 may be disposed in front of the clutch block 300 and may be formed with a spline hole 252 having a spline shape to which the spline unit 301 described above is coupled. The clutch block 300 may have a structure in which the spline portion 301 is coupled to the spline hole 252 of the coupling member 250 to rotate integrally with the coupling member 250.

The connecting member 250 may be formed with three connecting legs 251 which are bent and extended forward on the outer circumferential surface of the connecting bracket 100. The connecting leg 251 may extend through the guide slot 201a, And may be coupled through the leg slot 103. The coupling member 250 is engaged with the lever bracket 100 as described above, so that the clutch block 300 can receive rotational force from the lever bracket 100.

The clutch block 300 and the spline portion 301 may be formed with an insertion hole 303 through which the tip of the output unit 620 passes. The outer circumferential surface of the clutch block 300 may have a plurality of cam surfaces 302 formed at equal intervals or continuously along the circumferential direction, and the cam surface 302 may have a concave curved surface or a planar shape.

The clutch drum 400 can be received in the housing 200 and is rotated by receiving the rotational force of the clutch block 300. The rotational force of the clutch drum 400 is transmitted to an output unit 620 to be described later and the output unit 620 transmits power to the link means of the seat cushion 10 so that the height of the seat cushion 10 can be adjusted do.

The clutch drum 400 may include, for example, a drum portion 401 having a drum shape as shown in the figure. A through hole 402 through which the tip of the output unit 620, which will be described later, passes, may be formed at the center of the drum unit 401.

The clutch drum 400 may be received in the interior of the housing 200 and the clutch block 300 may be inserted into the open front of the drum portion 401 to be disposed in the inner space of the clutch drum 400 .

In this case, there is a clearance between the inner circumferential surface of the drum portion 401 and the outer circumferential surface of the clutch block 300 along the circumferential direction, and the assembly 500 to be described later may be interposed between the circumferential surfaces.

A flange portion 403 extending in the radial direction may be formed on a front outer periphery of the drum portion 401 and a clutch leg 404 bent backward may be formed on the outer periphery of the flange portion 403. [

The coupling member 500 transmits the rotational force of the clutch block 300 to the clutch drum 400. As an example of the constituent member 500, an example comprising a plurality of adjacent rollers 501 may be presented. In addition, the binder 500 may be formed in an arc shape as a whole, and the rollers 501 located at both ends of the binder 500 may be spaced apart from each other.

The rollers 501 may be disposed on the cam surface 302 formed on the outer peripheral surface of the clutch block 300 in a one-to-one correspondence with each other. The clutch assembly 500 is disposed between the clutch block 300 and the roller 501 and between the clutch drum 300 and the clutch drum 300 in a state interposed between the outer circumferential surface of the clutch block 300 and the inner circumferential surface of the clutch drum 400, A frictional force can be generated between the first and second plates 400 and 400. More specifically, frictional force can be generated between the cam surface 302 and the roller 501, and between the roller 501 and the inner peripheral surface of the drum portion 401. [ The rotational force of the clutch block 300 can be transmitted to the clutch drum 400 by the frictional force.

The output unit 620 can receive the rotational force from the clutch unit as described above, and more specifically, receives the rotational force from the clutch drum 400. Finally, the transmitted torque is transmitted to the link means.

The output unit 620 that may be presented as an example is a rotatable member that is rotatable to the shaft coupling portion 202 of the housing 200 while sequentially passing through the brake wedge 610, the clutch drum 400, and the clutch block 300 And a first axis 621 that can be coupled to the first axis 621. As shown in FIG. The second shaft 622 may be connected to the rear side of the first shaft 621 and may be rotatably coupled to the shaft coupling portion 701 of the cover plate 700 to be described later. And a third axis 623 which is formed continuously to the rear of the second axis 622 and extends to the rear of the cover plate 700. [

At this time, a first spline shaft 624 may be formed on one side of the first shaft 621. A spline hole 614 may be formed in the center of the brake wedge 610, which will be described later, corresponding to the first spline shaft 624. The output unit 620 is rotated integrally with the brake wedge 610 by coupling the first spline shaft 624 to the spline hole 614. [

A second spline shaft 625 may be formed on one side of the third shaft 623 to transmit power to the link member of the seat cushion 10.

The brake unit serves to prevent the output unit 620 from restraining, i.e. rotating, the operation of the output unit 620 with respect to the torque input from the link means.

The brake unit that performs this function may be configured to include a brake wedge 610 and a roller assembly 630. [

The brake wedge 610 is formed in a drum shape having an open front, and the drum portion 401 of the clutch drum 400 can be received therein. At this time, the outer side of the brake wedge 610 can be inserted into the space between the outer peripheral surface of the drum portion 401 and the inner side surface of the clutch leg 404.

The brake wedge 610 may have a wedge boss 611 protruding radially from the outer circumferential surface thereof. And, when the clutch drum 400 and the brake wedge 610 are engaged with each other, the clutch leg 404 can be positioned between the wedge bosses 611.

The roller assembly 630 is interposed between the outer circumferential surface of the brake wedge 610 and the inner circumferential surface of the housing 200.

The roller assembly 630 may include a roller 631 and an elastic member 632. The roller 631 may be a pair of wedge bosses 611 disposed on both sides of the wedge boss 611 as shown in FIG. However, the present invention is not limited to this example, and may be a single one disposed only in one direction of the wedge boss 611. The roller 631 may be a plurality of rollers arranged circumferentially on the outer circumferential surface of the brake wedge 610 as shown in FIG.

 The elastic member 632 may be disposed between the roller 631 and the wedge boss 611. [ The elastic member 632 provides an elastic force to the roller 631, and a detailed process thereof will be described in detail later.

The elastic member 632 included in the present embodiment is different from the spring included in the conventional pumping device. Specifically, the elastic member 632 may be made of a material that is elastically deformed in volume, and the elastic force is generated as the volume is elastically reduced by the exertion of pressure from the outside.

The elastic member 632 may comprise, for example, a polyurethane material, and may be made of a member having a constant volume as shown. The elastic member 632 may include pores therein.

The pore affects the deformation amount of the elastic member 632 or the generated elastic force according to the ratio of the pores occupying the entire volume of the elastic member 632. [ Therefore, the elastic member 632 may include pores considering this, so as to have appropriate elasticity to act on the roller 631.

In addition, the elastic member 632 may include a lubricant therein using pores. The lubricant may be, for example, grease. Since the lubricant is contained inside the elastic member 632, the lubricant can be discharged to the outside in the course of the volume reduction by the pressing of the elastic member 632, and the discharged lubricant is applied to the roller 631, It is possible to perform the lubrication function when the piston 631 moves.

On the other hand, the brake wedge 610 may be formed with an inclined surface on its outer circumferential surface. Specifically, the inclined surface may be composed of a roller position surface 612 into which the roller 631 is inserted and a restricting section surface 613 protruding radially from the outer circumferential surface of the brake wedge 610 between the roller position surface 612 have. The roller positioning surface 612 may be formed with the wedge boss 611 therebetween.

The interval between the inner circumferential surface of the body portion 201 and the outer circumferential surface of the brake wedge 610 at the restraint section surface 613 is reduced. Therefore, when the roller 631 moves in one direction, that is, in the direction from the roller position surface 612 toward the restraint surface 613, and is located on the restraint surface 613 as shown in FIG. 5, 631 and the outer circumferential surface of the brake wedge 610 and between the roller 631 and the inner circumferential surface of the body portion 201. That is, the roller 631 has a strong wedge action between the outer circumferential surface of the brake wedge 610 and the inner circumferential surface of the body portion 201. This causes rotation of the brake wedge 610 to be restricted. In addition, the rotation of the output unit 620 is also constrained.

However, when the roller 631 moves in the other direction, that is, in the direction from the restricting section surface 613 toward the roller position surface 612 and is located on the roller position surface 612, the roller 631 and the brake wedge 610 And a gap is formed between the roller 631 and the inner circumferential surface of the body portion 201 so that the rotation of the brake wedge 610 becomes free.

The clutch leg 404 rotates in accordance with the rotation of the clutch drum 400 and pushes the roller 631 positioned in the rotational direction as shown in Fig. As a result, the roller 631 moves to the other direction and is positioned on the roller position surface 612.

At this time, the roller 631 moving in the other direction pushes the elastic member 632. The elastic member 632 causes an elastic deformation in which the volume is decreased due to the pressing of the roller 631, and has an elastic force in this process. Then, the lubricant is discharged in the process of decreasing the volume, and the discharged lubricant is applied to the surface of the roller 631.

The continuous rotation of the clutch drum 400 causes the clutch leg 404 to continuously push the roller 631 and the rotational force of the clutch drum 400 is transmitted to the brake wedge 610. [ At this time, the other roller (631) beyond the wedge boss (611) moves in the direction of the roller position surface (612).

Thus, the roller 631 moves in the other direction and is positioned on the roller position surface 612, so that the brake wedge 610 is free to rotate and rotates together with the continuous rotation of the clutch drum 400. [ At the same time, the output unit 620 also rotates together, and the rotational force of the output unit 620 is transmitted to the link means.

When the height adjustment of the seat cushion 10 is completed and the rotation of the clutch drum 400 is stopped, the roller 631 moves to the original position by the elastic force of the elastic member 632 acting on the roller 631. [ That is, moves in one direction and is located on the confining section surface 613.

This causes the roller 631 to perform a wedge action again, and the brake wedge 610 is held in a restrained state even when torque is input to the output unit 620 through the link means. At the same time, the output unit 620 is also kept in a state in which rotation is restrained.

The lubricant discharged in accordance with the volume reduction of the elastic member 632 is applied to the roller 631 to perform the lubrication function. Accordingly, when the roller 631 is moved in the other direction by the clutch leg 404 while the wedge action is located on the restraint surface 613, the lubricant is smoothly moved by the lubrication function of the lubricant, do.

Since the roller 631 is in line contact between the inner peripheral surface of the body 201 and the outer peripheral surface of the roller 631 and the brake wedge 610, The lubricant existing on the friction surface of the elastic member 632 may be pushed toward the elastic member 632. [ The lubricant thus pushed can be absorbed back into the elastic member 632 in the course of the expansion of the elastic member 632. The absorbed lubricant can be discharged again and applied to the roller 631 while the elastic member 632 is compressed by the roller 631. [ Therefore, the present embodiment can continuously reuse the lubricant due to the structural and material characteristics of the elastic member 632 described above.

On the other hand, Fig. 7 shows another example of the brake unit described with reference to Figs. In this example, the brake wedge 610 may not be formed with the wedge boss 611 as shown.

The roller assemblies interposed between the inclined surfaces and the inner circumferential surface of the housing 200 may be formed by a pair of rollers 631 and a pair of And an elastic member 633 interposed between the rollers 631.

In this example of the brake unit, only the difference from the brake unit described above will be described as follows.

When the wedge boss 611 is formed on the brake wedge 610 as described above, one side of the elastic member 632 is supported by one side of the wedge boss 611 when the roller 631 moves in the other direction (See Figs. 5 and 6). In the example shown in Fig. 7, however, one of the elastic members 633 is connected to the restricting section surface 631 of the pair of rollers 631 (In the direction of the roller position surface 612) in accordance with the movement of the clutch leg 404, while being supported by any one of the rollers (right rollers 631 in the illustrated example) And the other is pressed by a roller (left roller 631 in the illustrated example).

When the clutch drum 404 is continuously pushed by the left roller 631 due to continuous rotation of the clutch drum 400, the rotational force of the clutch drum 400 is transmitted to the brake wedge 610. At this time, Is moved in the direction toward the roller position surface 612 (the other direction). Further, one of the elastic members 633 is pressed while being moved.

The brake unit according to the present embodiment can be provided with an elastic member having a larger volume in the same space as the brake unit described above. This makes it possible to set the elastic force of the elastic member or to adjust the elastic force of the lubricant It may be more advantageous in terms of quantity.

The open rear side of the above-described housing 200 can be closed by the cover plate 700. The cover plate 700 may have various shapes, for example, an example in which a shaft-engaging portion 701 is formed, which is disk-shaped as shown in the example shown in the drawing, and which is rotatably coupled with the second shaft 622 at the center .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that the modification or the modification is possible by the person.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

One; A pumping device 100 of a vehicle seat; Lever bracket
101; A bracket body 102; Coupling hole
103; Leg slot 104; Bracket leg
130; Clutch spring 131; The body portion
132; Bending section 160; Return spring
161; A bending section 200; housing
201; Body portion 202; The shaft-
203; A flange portion 204; Stopper portion
250; A connecting member 251; Connecting leg
252; Spline hole 300; Clutch block
301; Spline portion 302; Cam face
303; Insertion hole 400; Clutch drum
401; A drum portion 402; Through hole
403; Flange portion 404; Clutch leg
500; Member 501; roller
610; Brake wedge 611; Wedge boss
612; Roller location surface 613; Constraint section face
614; Spline hole 620; Output unit
621; A first axis 622; Second axis
623; A third axis 624; The first spline shaft
625; A second spline shaft 630; Roller assembly
631; Rollers 632, 633; Elastic member
700; A cover plate 701; The shaft-

Claims (5)

An output unit for transmitting the input torque to the link means of the seat cushion, a brake unit for restricting the operation of the output unit with respect to the torque input from the link means, and a housing for accommodating the brake unit therein A sheet pumping device comprising:
Wherein the brake unit comprises: a brake wedge coupled to rotate integrally with the output unit and having an inclined surface formed on an outer circumferential surface thereof; A roller interposed between an inclined surface of the brake wedge and the inner circumferential surface of the housing to generate a frictional force with respect to the outer circumferential surface of the brake wedge and the inner circumferential surface of the housing as the tool moves in one direction to prevent the brake wedge from rotating; And an elastic member for providing an elastic force in the one direction with respect to the roller,
The elastic force is generated as the volume of the elastic member is reduced due to the pressing of the roller moving in the other direction,
The elastic member has a plurality of pores formed therein, so that the lubricant is absorbed into the pores when expanded,
Wherein the lubricant is discharged to the outside of the elastic member when the elastic member is compressed.
delete delete The method according to claim 1,
Characterized in that the lubricant comprises a grease.
The method according to claim 1,
Wherein the elastic member comprises a polyurethane material.

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