KR102142008B1 - Height adjustment apparatus for seat of vehicle - Google Patents

Abstract

The present invention relates to a height adjustment device for an automobile seat, a lever bracket installed to be rotatable in conjunction with an operation lever, a housing formed to guide rotation of the lever bracket and fixed to a cushion frame of the seat, accommodated in the interior of the housing The push spring for elastically supporting the unlocking block and being provided at an end of the cushion frame in the seat of the seat of the seat of the unlocking block, the unlocking block being urged by the lever bracket to be movable along the axial direction, and the housing A pinion gear which is fixed to the cushion frame of the seat together and has a concave-convex portion formed on an inner circumferential surface, a toothed portion provided to mesh with a rack gear provided on the cushion frame of the seat, and a brake portion facing the inner circumferential surface of the brake ring, the A brake roller installed in a space formed along the circumferential direction between the inner circumferential surface of the brake ring and the outer circumferential surface of the brake part and formed to accompany frictional action between the uneven portion of the brake ring and the outer circumferential surface of the brake portion according to the movement of the unlocking block , And a plate cover installed between the brake ring and the cushion frame of the seat, the push spring is in contact, and the toothed portion of the pinion gear penetrates and engages the housing, thereby miniaturizing and reducing the overall volume, It has the effect of adjusting the height of the sheet with a simple operation.

Description

Height adjuster for car seat {HEIGHT ADJUSTMENT APPARATUS FOR SEAT OF VEHICLE}

The present invention relates to a height adjustment device for an automobile seat, and more specifically, to adjust the height of the seat by operating a separate link mechanism installed at the bottom of the seat through the operating force provided by the user and a preset elastic force, and adjust the height of the seat. It relates to a height adjustment device for a vehicle seat to be maintained.

In general, seats, which are the driver's seats, auxiliary seats, and passenger seats installed at the front and rear of the interior of the vehicle, are equipped with various convenience devices for passenger comfort.

As a convenience device, according to the body shape of the occupant, a sliding function capable of pushing and pulling a seat cushion in the front-rear direction, as well as reclining to adjust the inclination of the seat back corresponding to the backrest. A height adjustment function is provided to adjust the height of the seat cushion to fit the function and the body size of the occupant.

The pumping device may be largely composed of a lever unit, a clutch unit, an output unit and a brake unit.

The lever unit receives the user's operating force and transmits it to the clutch unit. The clutch unit transmits the input user's operating force (rotating power) to the output unit, and the output unit functions to transmit the received torque to the link means of the seat cushion. In addition, the brake unit blocks a torque that is reversely input to perform a function of fixing the link means that has been completed.

A specific example of such a pumping device is the pumping device disclosed in Korean Patent Registration No. 10-1835524.

Referring to FIG. 1, the lever bracket 10, the housing 20, the lever spring 30, the clutch wedge 40, the clutch drum 50, the clutch roller 60, the elastic member 70, the fixing member ( 80), an output member 90, a brake roller 100 and a cover bracket 110.

When the driver operates the operation lever (not shown), the output member 90 rotates to adjust the height of the seat, and when the driver stops the operation of the operation lever, the output member 90 is fixed. .

When the driver operates the operation lever (not shown), the lever bracket 10 connected to a lever rotates in conjunction, and the clutch wedge 40 coupled with the lever bracket 10 also rotates.

Since the friction force is generated between the clutch wedge 40 and the clutch roller 60 and between the clutch roller 60 and the clutch drum 50, the clutch drum 50 is rotated according to the rotation of the clutch wedge 40. ) Also rotates in conjunction.

The brake roller 100 is formed to accompany a friction action between the inner peripheral surface of the fixing member 80 and the uneven surface of the output member 90.

When the clutch drum 50 rotates, the drum leg 52 integrally formed with the clutch drum 50 rotates. At this time, the drum leg 52 presses the roller disposed in the rotational direction, and accordingly the pressed roller is moved along the rotational direction, so that the entire output member 80 rotates, and the fixing member 80 The inner peripheral surface of the and the outer peripheral surface of the output member is rotated while contacting. On the other hand, the rollers arranged in the opposite direction (reverse rotation direction) of the rotational direction are also moved according to the rotation of the output member 80.

Eventually, the output member 80 is rotated in cooperation with the clutch drum 50, and outputs a rotational force to the outside. That is, the tooth portion of the output member 90 rotates, and the tooth portion serves as a pinion gear, so that the height of the sheet is adjusted by moving the lag gear (not shown) of the seat.

Next, a process in which the driver is fixed when the operation lever is stopped is described.

When the driver stops the operation of the operation lever, the lever spring 30 expands by an elastic force (restoration force), and accordingly, the lever bracket 10 and the clutch wedge 40 rotate in the reverse rotation direction, and Is restored to its location.

On the other hand, when the operation of the operation lever is stopped, since the rotational force of the drum leg 52, which pressed the roller, is extinguished, the roller is moved by the restoring force. Therefore, a roller is fitted between the output member 90 and the inner circumferential surface of the fixing member 80, and a strong friction force is generated, so that rotation of the output member 90 is restricted.

As a result, in the case of the present invention, when the driver stops operating the operation lever, the lever bracket 10 and the clutch wedge 40 are restored to their original positions, but the output member 90 is restrained and does not rotate.

As described above, the conventional pumping device controls the height of the seat by continuously operating the operating lever. Therefore, there is a need to develop a device capable of adjusting the height of the sheet only by simple operation.

Republic of Korea Registered Patent Publication No. 10-1835524 (2018.03.08)

The present invention was created to improve the problems of the height adjustment device of the conventional automobile seat as described above, and provides a height adjustment device for an automobile seat that can adjust the height of the seat by simple operation without the need for continuous lever operation. Has its purpose.

In order to achieve the above object, the height adjusting device for the vehicle seat according to the present invention is a lever bracket installed to be rotatable in conjunction with an operation lever, a housing formed to guide the rotation of the lever bracket and to be fixed to the cushion frame of the seat , Unlocking block accommodated inside the housing and pressurized by the lever bracket to be movable along the axial direction, provided at an end of the seat of the seat of the seat of the unlocking block in the cushion frame direction and elastically supporting the unlocking block A push spring, a brake ring fixed to the cushion frame of the seat together with the housing and having an uneven portion formed on an inner circumferential surface, a toothed portion provided to engage with a lek gear provided on the cushion frame of the seat, and a brake facing the inner circumferential surface of the brake ring A pinion gear provided in a part, installed in a space formed along the circumferential direction between the inner circumferential surface of the brake ring and the outer circumferential surface of the brake portion, and friction between the uneven portion of the brake ring and the outer circumferential surface of the brake portion according to the movement of the unlocking block And a brake roller formed to accompany the action, and a plate cover installed between the brake ring and the cushion frame of the seat, the push spring is in contact, and the teeth of the pinion gear penetrate and engage with the housing. do.

At this time, the lever bracket is formed with a bracket body that is rotatably interlocked with the operation lever, and is formed to bend and extend in the cushion frame direction of the seat from the bracket body and is rotatable along the inner circumferential surface of the unlocking block. It is also possible to include a switched lever switch.

At this time, the unlocking block is a block body formed in a cylindrical shape to be accommodated in the housing, a switch formed in a groove shape in the cushion frame direction of the seat at the end of the lever bracket direction of the block body to guide the movement of the lever switch The guide unit, and the protruding from the outer circumferential surface of the block body is formed extending in the direction of the cushion frame of the seat and formed to be inserted between the inner circumferential surface of the brake ring and the outer circumferential surface of the brake part of the pinion gear when pressed by the lever bracket. It is also possible to include a king leg.

At this time, the switch guide portion may include a guide slope formed by inclining in the direction of the cushion frame of the seat at the end of the lever bracket direction of the block body, and a receiving part connected to the guide slope and configured to accommodate the lever switch. Do.

Meanwhile, the pinion gear may further include a shaft portion inserted into the lever bracket and provided to be rotatable.

In addition, it is possible to further include a brake spring provided between the pair of brake rollers and elastically supporting the pair of brake rollers.

On the other hand, it is also possible to further include a balance spring that is linked to the rack gear provided in the cushion frame of the seat and applies elastic force in a direction in which the seat of the vehicle rises.

As described above, according to the height adjusting device for a vehicle seat according to the present invention, the overall volume can be reduced in size and weight, and there is an effect of adjusting the height of the seat only by simple operation.

1 is an exploded perspective view of a conventional vehicle seat height adjustment device,
Figure 2 is an exploded perspective view of the height adjustment device for a car seat according to an embodiment of the present invention,
Figure 3 is a cross-sectional view of the height adjustment device for a car seat according to an embodiment of the present invention,
Figure 4 is a view of the lever bracket of the height adjustment device of the car seat according to an embodiment of the present invention,
Figure 5 is an enlarged view of the lever bracket of the height adjustment device of the car seat according to an embodiment of the present invention as viewed from the outside of the vehicle,
Figure 6 is a perspective view of the unlocking block of the height adjustment device of the vehicle seat according to an embodiment of the present invention,
7 is a view seen from the seat direction of the vehicle in a state in which the plate cover is removed from the height adjusting device for the vehicle seat according to an embodiment of the present invention;
8 is a view showing that the lever switch rotates along the switch guide portion of the unlocking block in the height adjustment device of the vehicle seat according to an embodiment of the present invention,
9 is a view showing a state after the lever switch is rotated along the switch guide portion of the unlocking block in the height adjustment device of the car seat according to an embodiment of the present invention,
10 is a cross-sectional view showing a state before the unlocking block is inserted between the brake ring and the pinion gear in the height adjustment device of the vehicle seat according to an embodiment of the present invention,
11 is a cross-sectional view showing a state in which the unlocking block is inserted between the brake ring and the pinion gear in the height adjusting device of the vehicle seat according to an embodiment of the present invention,
12 is a view showing a state in which the brake roller is inserted between the brake ring and the pinion gear before the unlocking block is inserted between the brake ring and the pinion gear,
13 is a view showing a state in which the restraint of the brake roller is released by inserting the unlocking block between the brake ring and the pinion gear,
14 is a perspective view showing a cushion frame and a balance spring of a seat in a height adjusting device for an automobile seat according to an embodiment of the present invention,
15 is a perspective view showing the engagement of the pinion gear and the rack gear and the linkage of the rack gear in the height adjusting device for the vehicle seat according to an embodiment of the present invention.

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

2, 3, 14 and 15, the height adjustment device of the vehicle seat according to an embodiment of the present invention, the lever bracket 100, the return spring 150, the housing 200, the unlocking It includes a block 300, a centering block 350, a brake ring 400, a roller portion 500, a pinion gear 600, a plate cover 700, a balance spring 800 and a rack gear 900.

First, when explaining the structure of the housing 200 to describe the overall coupling relationship of the height adjustment device of the vehicle seat according to an embodiment of the present invention, the housing 200 includes a housing body 210, an axial hole ( 220, a switch guide hole 230, a block accommodating portion 240, a leg guide portion 250, a cover coupling portion 260, and a coupling hole 270.

3 and 5, the housing body 210 is formed in a circular plate shape, and is extended in a bending direction in the seat direction of the vehicle, and is formed in a shape similar to a cylinder in which the seat direction surface of the vehicle is opened, and blocks therein. The accommodating portion 240 and the leg guide portion 250 are formed in a groove shape, and a plurality of the cover coupling portions 260 are formed to extend radially outward from an end portion extending in the sheet direction of the housing body 210. do. On the other hand, the shaft hole portion 220 is formed at the center of the housing body 210, and the switch guide hole 230 is formed radially outward in the radial direction of the shaft hole portion 220 to be formed along the circumferential direction.

The block accommodating part 240 is formed in the form of a radial groove opened in the seat direction of the vehicle, and the unlocking block 300 and the centering block 350 are accommodated therein. At this time, a plurality of the leg guide portion 250 is formed in a groove shape along the circumferential direction on the radially outer side of the block receiving portion 240. That is, the leg guide portion 250 is formed into a groove in the radial direction outward from the side wall (inner circumferential surface of the housing body 210) of the block receiving portion 240, the leg guide portion 250 is axial It is formed along the direction.

In addition, the coupling holes 270 are formed in the cover coupling portions 260, respectively.

Therefore, the housing 200 is coupled to the lever bracket 100 and the return spring 150 in the vehicle's seat outer direction (opposite direction of the vehicle's seat direction), and the plate through the engaging portion 260 It is fixed to the cushion frame 1000 of the seat together with the cover 700, and is coupled to the plate cover 700, and therein the unlocking block 300, the centering block 350, and the brake ring 400 , Accommodates the roller part 500 and the pinion gear 600.

Referring to FIG. 4, the lever bracket 100 includes a bracket body 110 and a lever switch 120.

The bracket body 110 is combined with an operation lever (not shown) and is formed in a disc shape, and a hole is formed to insert the centering block 350 and the pinion gear 600 at the center.

The lever switch 120 is formed to extend from the bracket body 110 in the direction of the seat of the vehicle (cushion frame direction of the seat). That is, the lever switch 120 protrudes in a direction perpendicular to the bracket body 110 in the form of a disk. At this time, the lever switch 120 penetrates the switch guide hole 230 of the housing 200 and contacts the unlocking block 300.

The return spring 150 is provided along a circumferential direction between the plurality of lever switches 120 and seated on the housing 200. At this time, the return spring 150 is provided on the switch guide hole 230 and concentric circles, and is provided to elastically support the lever switch 120.

Referring to FIG. 6, the unlocking block 300 includes a block body 310, an unlocking leg 320, a switch guide part 330 and a push spring 340.

At this time, the block body 310 is formed in a cylinder shape, the unlocking leg 320 is formed to extend radially outward on the outer circumferential surface, and the switch guide part 330 is formed on the inner circumferential surface.

The unlocking leg 320 extends radially outwardly from the outer circumferential surface of the block body 310 and extends 321 in the seat direction of the vehicle (cushion frame direction of the seat). It includes an insertion portion 322 formed to extend the bend.

At this time, the unlocking leg 320 is accommodated in the leg guide portion 250 of the housing 200, and can be inserted into a space formed between the inner circumferential surface of the brake ring 400 and the pinion gear 600. Is placed. On the other hand, in this embodiment, the unlocking legs 320 are formed at regular intervals along the circumferential direction, but are not limited thereto.

The switch guide part 330 is formed in a groove shape on the inner circumferential surface of the block body 310, and includes a guide slope 331 and a receiving part 332.

At this time, the guide inclination 331 is formed to be inclined to be narrower toward the cushion frame direction of the seat at the end of the lever bracket 100 direction. That is, the grooves of the inner circumferential surface formed at the end of the block bracket 310 in the direction of the lever bracket 100 are formed at a relatively large angle along the circumferential direction, and gradually decrease in angle toward the cushion frame direction of the seat. It is a converging form.

On the other hand, the receiving portion 332 is formed to be connected to the guide slope 331, and is formed with a width corresponding to the circumferential thickness of the lever switch 120 to accommodate the lever switch 120.

In addition, a radial step between the switch guide portion 330 in the groove shape and the inner circumferential surface of the block body 310 is formed corresponding to the radial thickness of the lever switch 120, and the switch guide portion 330 The axial step formed with the inner circumferential surface of the block body 310 is formed corresponding to the axial length of the insertion portion 322.

The push spring 340 is provided at an end portion in the cushion frame direction of the seat of the insertion portion 322 to elastically support the unlocking block 300. That is, one end of the push spring 340 is in contact with the insertion portion 322, the other end is in contact with the plate cover 700. On the other hand, in this embodiment, a groove in which one end of the push spring 340 is accommodated is formed at the end of the seat 322 of the seat in the cushion frame direction, but is not limited thereto.

Referring to FIG. 3, the centering block 350 is accommodated in the inner circumferential surface of the unlocking block 300 and includes an unlocking coupling part 351 and a housing coupling part 352. That is, the outer circumferential surface of the unlocking coupling portion 351 is provided to face the inner circumferential surface of the unlocking block 300 and the lever switch 120, and the housing coupling portion 352 is provided to the shaft hole portion 220. Is inserted. In addition, the pinion gear 600 is inserted into the inner circumferential surface of the centering block 350 to be axially rotatable.

2, 3 and 7, the brake ring 400 includes a ring body 410, a fixing portion 420, an uneven portion 430, and a coupling hole 440. The ring body 410 is formed in a ring shape, the fixing portion 420 is formed to extend radially outward of the ring body 410, the uneven portion 430 on the inner circumferential surface of the ring body 410 Is formed, a coupling hole 440 communicating with the coupling hole 270 of the housing 200 is formed in the fixing part 420. At this time, the ring body 410 and the fixing part 420 are accommodated in the cover coupling part 260 of the housing 200 and cushion the seat together with the housing 200 and the plate cover 700. It is fixedly coupled to the frame 1000.

The uneven portion 430 is formed on the inner peripheral surface of the ring body 410, and includes a restraining surface 431 and a rotating surface 432. At this time, the restraining surface 431 is formed on the inner circumferential surface of the ring body 410, and is arranged to face the unlocking leg 320. That is, when the axial movement of the unlocking leg 320, the unlocking leg 320 and the restraining 431 are disposed to face each other.

On the other hand, the rotating surface 432 is formed in connection with the restraining surface 431, is formed by being cut out in the circumferential direction than the restraining surface 431. That is, the concave-convex portion 430 is a wedge shape in which the restraining surface 431 protrudes in the circumferential direction from the rotating surface 432. In addition, the rotating surface 432 is disposed to face the roller portion 500.

The roller part 500 includes a brake roller 510 and a brake spring 520.

The brake roller 510 is installed in a space formed along the circumferential direction between the uneven portion 430 of the brake ring 400 and the pinion gear 600, and the restraining surface 431 and the rotating surface ( 432).

The brake spring 520 is provided between the pair of brake rollers 510 and elastically supports the pair of brake rollers 510 to each other.

The pinion gear 600 includes a tooth portion 610, a brake portion 620, and a shaft portion 630.

At this time, the tooth portion 610 penetrates the plate cover 700 and gear teeth are formed on the outer circumferential surface to mesh with the rack gear 900.

In addition, the brake portion 620 is coupled to the tooth portion 610 and is disposed to face the uneven portion 430. At this time, the brake roller 510 is disposed to be movable along the outer circumferential surface of the brake unit 620. On the other hand, in the present embodiment, the brake unit 620 is formed integrally with the teeth 610, but is not limited thereto, and includes coupling by spline coupling or the like.

The shaft portion 630 is connected to the teeth 610 and the brake portion 620, is rotatably inserted into the centering block 350, the shaft hole portion 220 and the lever of the housing 200 It is inserted into the hole formed in the center of the bracket 100.

The plate cover 700 includes a cover body 710, a through hole 720, a coupling hole 730, and a housing coupling portion 740.

At this time, the cover body 710 is formed corresponding to the shape of the cover coupling portion 260 and the brake ring 400 of the housing 200 and the through hole 720 is formed in the center to form the pinion gear ( The tooth portion 610 of 600) penetrates.

The coupling hole 730 is formed to communicate with the coupling hole 270 of the housing 200 and the coupling hole 440 of the brake ring 400.

The housing coupling portion 740 is formed extending from the cover body 710 in the direction of the lever bracket 100, and is coupled to the housing 200. On the other hand, in the present embodiment, the housing coupling portion 740 is hooked with the outer circumferential surface of the housing 200, but is not limited thereto.

Therefore, the cover body 710 is coupled to the housing 200 and the brake ring 400, and is fixedly coupled to the cushion frame 1000 of the seat.

14 to 15 show the cushion frame 1000 of the seat in which the height adjustment device of the vehicle seat of the present invention is mounted. 14 and 15, in this embodiment, the balance spring 800 is provided on the cushion frame 1000 of the seat, and the balance spring 800 is the rack gear 900 through link coupling. It is connected with. In addition, the rack gear 900 is engaged with the pinion gear 600.

Referring to Figures 2, 3, 8 to 15, the operation of the height adjustment device of the vehicle seat according to an embodiment of the present invention will be described. When the driver operates the operation lever (not shown), the brake roller 510 ) The pinion gear 600 is rotatable while moving to the rotating surface 432, so that the height of the seat can be changed, and when the driver stops the operation of the operation lever (not shown), the brake roller 510 is restrained. While moving to the surface 431, the rotation of the pinion gear 600 is constrained to perform the function of fixing the height of the seat.

First, a description will be given of the brake release process when the driver operates the operation lever.

When the driver operates the operation lever (not shown), the lever bracket 100 connected to a lever rotates in conjunction, and the lever switch 120 of the lever bracket 100 also rotates.

At this time, the lever switch 120 rotates along the switch guide hole 230 of the housing 200 while pressing the return spring 150, and the return spring 150 is within the housing 200. Is compressed.

In addition, as the lever switch 120 accommodated in the space between the receiving portion 332 and the centering block 350 of the unlocking block 300 rotates, the unlocking block 300 tilts the guide. It is pressed in the direction of the cushion frame 1000 of the seat along 331, and the unlocking leg 320 moves in the direction of the cushion frame 1000 of the seat along the leg guide portion 250 (FIG. 8) And Figure 9).

As a result, the insertion portion 322 of the unlocking leg 320 is inserted into the space between the restraining surface 431 of the brake ring 400 and the brake portion 620 of the pinion gear 600. 10 (see FIGS. 10 and 11 ), and the brake roller 510 sandwiched between the restraining surface 431 and the brake part 620 is placed between the rotating surface 432 and the brake part 620. Move to space (see FIGS. 12 and 13).

Therefore, while the restraint due to friction between the brake unit 620 and the brake roller 510 is released, the pinion gear 600 is freely rotatable.

At this time, an elastic force is previously input to the rack gear 900 engaged with the pinion gear 600 in the direction in which the seat of the vehicle rises through the balance spring 800 (see FIG. 14 ).

Therefore, when the driver does not sit in the seat and operates the operation lever (not shown), the seat of the vehicle moves in an upward direction.

Meanwhile, when the driver sits in the seat, the seat of the vehicle is moved in a descending direction by gravity (overcoming the elastic force of the balance spring 800).

That is, when the driver operates the operation lever (not shown), the restraint that limits the rotation of the pinion gear 600 is released, and the vehicle is driven by external force (elastic force of the balance spring 800 and gravity due to the driver's weight). The sheet moves up and down.

Next, a description will be given of a process that is fixed when the driver stops the operation of the operation lever (not shown).

When the driver stops the operation of the operation lever, the return spring 150 expands by an elastic force (restoration force), and accordingly the lever switch 120 rotates along the switch guide hole 230, and eventually the The lever bracket 100 is restored to the initial position while rotating in the reverse rotation direction.

In addition, as the force of the lever switch 120 that pressurized the unlocking block 300 is released, the unlocking leg 320 follows the leg guide part 250 by the restoring force of the push spring 340. The lever bracket 100 moves in the direction, and the insertion portion 322 comes out of the space between the restraining surface 431 and the brake portion 620.

As a result, the brake roller 510 disposed between the rotating surface 432 and the brake part 620 is between the restraining surface 431 and the brake part 620 by the restoring force of the brake spring 520. Is moved to space. Therefore, the brake roller 510 is sandwiched between the restraining surface 431 and the brake part 620, and strong friction force is generated, so that the rotation of the pinion gear 600 is restrained.

As a result, in the case of the present invention, when the driver stops operating the operation lever, the lever bracket 100 and the unlocking block 300 are restored to their original positions, and the pinion gear 600 is restrained and does not rotate.

Although the present invention has been described in detail through specific examples, the present invention is specifically for describing the present invention, and the present invention is not limited thereto, and the present invention has ordinary knowledge in the field within the technical spirit of the present invention. It is clear that the modification and improvement are possible by the ruler.

All simple modifications or changes of the present invention belong to the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

100: lever bracket
120: lever switch
150: return spring
200: housing
230: switch guide hole
300: unlocking block
320: unlocking leg
330: switch guide
331: guide slope
332: accommodation
340: push spring
350: centering block
400: brake ring
430: irregularities
431: Constrained surface
432: rotating surface
510: brake roller
520: brake spring
600: pinion gear
610: teeth
620: brake
700: plate cover
800: balance spring
900: rack gear
1000: seat cushion frame

Claims (7)

A lever bracket coupled to the operation lever and installed to rotate in conjunction with the operation lever;
A housing formed to guide the rotation of the lever bracket and to be fixed to the cushion frame of the seat;
An unlocking block accommodated inside the housing and provided to be urged by the lever bracket to be movable along an axial direction;
A push spring provided at an end portion in the cushion frame direction of the seat of the unlocking block and elastically supporting the unlocking block;
A brake ring fixed to the cushion frame of the seat together with the housing and having an uneven portion formed on an inner circumferential surface;
A pinion gear provided with a toothed portion so as to mesh with a lag gear provided on the cushion frame of the seat, and a pinion gear having a brake portion facing the inner circumferential surface of the brake ring;
It is installed in a space formed along the circumferential direction between the inner circumferential surface of the brake ring and the outer circumferential surface of the brake portion, and is formed to accompany a friction action between the uneven portion of the brake ring and the outer circumferential surface of the brake portion according to the movement of the unlocking block. Brake rollers; And
A plate cover installed between the brake ring and the cushion frame of the seat, the push spring is in contact, the toothed portion of the pinion gear penetrates, and is formed to engage the housing;
Including,
The lever bracket,
A bracket body formed in a plate shape to be rotatable in cooperation with the operation lever; And
A lever switch formed to be bent from the bracket body in the direction of the cushion frame of the seat, and rotatably provided along an inner circumferential surface of the unlocking block;
It includes,
The unlocking block,
A block body formed in a cylindrical shape to be accommodated in the housing;
A switch guide portion formed in a groove shape in a cushion frame direction of the seat at an end in the lever bracket direction of the block body to guide the movement of the lever switch; And
An unlocking leg protruding from the outer circumferential surface of the block body and extending in the cushion frame direction of the seat;
Including,
The unlocking leg,
When pressed by the lever bracket, it is moved along the axial direction to enable free rotation of the pinion gear, and is inserted between the inner circumferential surface of the brake ring and the outer circumferential surface of the brake part of the pinion gear, and the brake part and the brake roller Height adjustment device for a car seat, characterized in that to release the restraint between.
delete delete According to claim 1,
The switch guide unit,
A guide inclination formed by inclining in the direction of the cushion frame of the seat at the end in the lever bracket direction of the block body; And
A receiving portion connected to the guide inclined and formed to accommodate the lever switch;
Height adjustment device for a car seat, characterized in that it comprises a.
According to claim 1,
The pinion gear,
A shaft portion inserted into the lever bracket and provided to be rotatable;
Height adjustment device of the car seat, characterized in that it further comprises.
According to claim 1,
A brake spring provided between the pair of brake rollers and elastically supporting the pair of brake rollers;
Height adjustment device for a car seat, characterized in that it further comprises.
According to claim 1,
A balance spring that is linked with a rack gear provided in the cushion frame of the seat and applies elastic force in a direction in which the seat of the vehicle rises;
Height adjustment device for a car seat, characterized in that it further comprises.

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