KR20200021041A - Apparatus for extending of seat-cushion and vehicle seat comprising the same - Google Patents

Abstract

The present invention relates to a seat cushion length adjustment device and a vehicle seat including the same. The seat cushion length adjustment device comprises: an extension unit which is disposed on a seat frame to be moved; and a tilting module connected to the extension unit and controlling movement of the extension unit. The extension unit can be withdrawn in stages from the seat frame under the control of the tilting module, and the withdrawn extension unit returns to a state before being withdrawn by the control of the tilting module in a final withdrawing step. Therefore, the extension unit is withdrawn in stages during withdrawal, so that the length of a seat cushion can be adjusted in stages, thereby adjusting the length of the seat cushion according to several people. In addition, when returning to the seat frame, the extension unit is automatically returned by the elastic force of a return elastic member, thereby increasing usability of a user.

Description

Seat cushion length adjusting device and automobile seat including same {APPARATUS FOR EXTENDING OF SEAT-CUSHION AND VEHICLE SEAT COMPRISING THE SAME}

The present invention relates to a seat cushion length adjustment device and a vehicle seat comprising the same.

In the interior of the car, front and rear seats are arranged for drivers and passengers to sit. The front seats include separate driver's and passenger seats, and the rear seats combine left and right seats integrally.

The front seat includes a seat cushion fixed to a horizontal frame moving back and forth along a guide rail mounted on an indoor floor, a seat back fixed to a vertical frame disposed at an angle with the horizontal frame, and a headrest installed on the seat back. .

In addition, the length adjustment lever for adjusting the position of the entire seat according to the occupant's body is provided at the lower end of the seat cushion, the side of the seat is provided with an angle adjustment lever for adjusting the inclination angle of the seat back, the backrest portion.

The seat cushion moves back and forth along the guide rails to adjust the distance between the driver and the steering handle. However, the length of the seat cushion is not adjusted according to the length of the lower body of the driver, so in the case of a long lower driver, the thigh is not supported as it leaves the seat cushion and is easily fatigued. On the contrary, the driver with a short lower body could not move the knee freely because the seat cushion reached the knee joint.

Public utility model No. 20-1998-047273 (1998.09.25.) Patent Publication No. 10-2018-0060402 (2018.06.07.)

The present invention provides a seat cushion length adjusting device for adjusting the length of the seat cushion to fit the body shape of the seated person, and an automobile seat including the same.

An apparatus for adjusting a seat cushion length according to an embodiment of the present invention includes an extension part disposed on a seat frame and a tilting module connected to the extension part and controlling the movement of the extension part, wherein the extension part includes: Under the control of the tilting module may be drawn out step by step in the seat frame, and the extended extension part is returned to the state before being pulled out by the tilting module control in the final withdrawal step.

The seat cushion length adjusting device may further include a base bracket connected to the seat frame and supporting the tilting module.

The upper end of the tilting module is connected to the extension part and the lower end is connected to the base bracket, and the tilting module can be rotated step by step with respect to the lower end when the extension part is pulled out.

The tilting module includes a connecting link connected to the extension part, a tilting housing connected to the connection link and connected to the base bracket so that the lower end rotates to the base bracket, the tilting housing having an arrangement space, and the base bracket located at the bottom of the base bracket. Is connected to the upper end may include a ratchet drive unit connected to the connection link.

The length of the ratchet drive unit may be gradually increased when the extension unit is pulled out.

The tilting housing may include a base link disposed on the base bracket, a first support connected to one side of the base link by a first lower hinge pin, and a second support and a first upper hinge connected to the other side of the base link by a second lower hinge pin. The connector may include a connector link connected to the first support by a pin and connected to the second support by a second upper hinge pin.

The placement space may be formed between the first support and the second support, a lower end of the ratchet drive unit may be connected to the second lower hinge pin, and an upper end thereof may be connected to the first upper hinge pin.

The ratchet driving unit includes a drive housing connected to the second lower hinge pin and a slide space and a stopper space formed therein, the ratchet body disposed to be linearly movable in the slide space and connected to the first upper hinge pin, and the slide space. A stopper disposed in the stopper and limiting a moving range of the ratchet body, a return elastic member disposed below the drive housing and applying an elastic force to the second support, and an elastic force to the stopper so that the stopper contacts the ratchet of the ratchet body. It may include a stopper elastic member for applying.

The driving housing may include a housing body in which the slide space and the stopper space are formed, and a housing hinge connected to the housing body and through which the first lower hinge pin penetrates.

The return elastic member may be coupled to the second lower hinge pin so that one end thereof is hung on the base link and the other end thereof is located between the housing body and the second support.

The ratchet body has a top end connected to the first upper hinge pin and a bottom end positioned in the slide space, the ratchet bar having one surface contacting the stopper, and a first stopper engaging jaw formed at intervals on one side of the ratchet bar. And a ratchet formed in plurality between the second stopper engaging jaw and the first stopper engaging jaw and the second stopper engaging jaw.

The stopper has a stopper body connected to the drive housing by a stopper hinge pin, protrudes from the upper end of the stopper body in the direction of the ratchet body and catches the ratchet and protrudes from the lower end of the stopper body toward the ratchet body. And it may include a locking jaw that can be caught on the second stopper locking jaw.

The stopper elastic member is connected to one end of the stopper body, and the catching step may be stepped onto the plurality of ratchets by linear movement of the ratchet body.

The connecting link may include a clearance bracket having a clearance hole connected to the second upper hinge pin and passing through the second upper hinge pin, a coupling block connected to the extension part through the seat frame, and the coupling block and the coupling block. It may include a connecting bar for connecting the play bracket.

The clearance hole may be formed in a vertical direction of the clearance bracket.

The extension part may include an extension panel disposed on the seat frame and movable and connected to the coupling block, a handle formed in front of the extension panel, and a plurality of panel guides disposed between the extension panel and the seat frame. have.

The panel guide may include a rail block connected to the seat frame and a rail block connected to the extension panel and movable along the rail.

An automobile seat according to an embodiment of the present invention, the seat cushion length adjustment device of the above-described configuration, the seat cushion with the seat cushion length adjustment device is disposed, the seat back connected to the seat cushion and the headrest disposed on the seat back Include.

According to the exemplary embodiment of the present invention, the extension part may be drawn out step by step so that the length of the seat cushion can be adjusted step by step to fit the length of the seat cushion to several people. And when returning to the seat frame is automatically returned by the elastic force of the return elastic member to improve the usability of the user.

According to an embodiment of the present invention, it is possible to realize a high added value of the automotive parts industry because it provides an optimal driving environment to improve psychological stability and concentration to provide an accident prevention effect.

1 is a schematic view showing a seat for a vehicle according to an embodiment of the present invention.
FIG. 2 is a schematic view showing a portion of the seat cushion of FIG. 1. FIG.
3 is a perspective view illustrating the extension of FIG. 2;
Figure 4 is an exploded perspective view showing a state in which the extension portion separated from the seat frame of FIG.
5 is a bottom perspective view of FIG. 3.
6 is a side view of the seat frame of FIG. 3;
7 is a perspective view showing the tilting module of FIG.
8 is an exploded perspective view of FIG. 7;
9 is an enlarged view of the ratchet drive unit of FIG. 8;
10 is a coupling diagram showing a coupling state of FIG.
FIG. 11 is a cross-sectional view of FIG. 7 taken along the line XI-XI; FIG.
12 and 13 are an operating state of the tilting module of FIG.
14 is a schematic diagram illustrating a state in which the extension part of FIG. 3 is drawn out from the seat frame.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Like parts are designated by like reference numerals throughout the specification.

Seat cushion length adjustment device according to an embodiment of the present invention can be applied to a vehicle seat which is an embodiment of the present invention, hereinafter will be described mainly on the seat for the vehicle is applied seat cushion length adjustment device.

Then, a car seat according to an embodiment of the present invention will be described with reference to FIGS. 1 to 14.

1 is a schematic view showing a seat for a vehicle according to an embodiment of the present invention, Figure 2 is a schematic view showing a part of the seat cushion of Figure 1, Figure 3 is a perspective view showing an extension of Figure 2, Figure 4 is a view 3 is a perspective view of the bottom view, FIG. 5 is a side view of the seat frame of FIG. 3, and FIG. 6 is an exploded perspective view showing an extension part of the seat frame of FIG. 3, and FIG. 7 is a tilting module of FIG. 6. FIG. 8 is an exploded perspective view of FIG. 7, FIG. 9 is an enlarged view of the ratchet drive unit of FIG. 8, FIG. 10 is a coupling view showing a coupling state of FIG. 9, and FIG. 11 is a XI-XI line of FIG. 7. 12 and 13 are operation state diagrams of the tilting module of FIG. 11, and FIG. 14 is a schematic view showing a state in which the extension part of FIG. 3 is drawn out of the seat frame.

First, referring to FIGS. 1 and 2, the seat 1 for a vehicle according to the present embodiment includes a seat cushion 10 in which the seat cushion length adjusting device 40 is disposed, and a seat back connected to the seat cushion 10. 20) and the headrest 3 disposed on the seatback, so that the length of the seat cushion can be adjusted according to the body shape of the driver.

The seat cushion 10 is disposed on a horizontal frame 13 that moves along a guide rail 12 installed on an indoor floor of a vehicle. At the tip of the horizontal frame 13, a seat frame 11 capable of adjusting the tip height of the seat cushion 10 is disposed. The seat frame 11 is provided with a seat cushion length adjusting device 40 which can extend the length of the seat cushion 10.

The seatback 20 has a lower end connected to the rear end of the horizontal frame 13 through a vertical frame (not shown). An angle adjusting unit (not shown) for adjusting the inclination of the seatback 20 is installed at a portion connecting the seatback 20 and the horizontal frame 13 to each other. The headrest 3 is disposed at the upper end of the seatback 20.

The detailed structure of the seat cushion 10, the seat back 20 and the headrest 3 can be applied to a well-known configuration of the car seat, the description of the detailed structure will be omitted below.

Next, the seat cushion length adjusting device will be described with reference to FIGS. 3 to 14.

First, referring to FIGS. 3 to 6, the seat cushion length adjusting device 40 is disposed on the seat frame 11 so as to be movable in the front and rear directions to extend the length of the seat cushion 10. An extension unit 50 and a tilting module 60 for controlling the movement of the extension unit 50 are included. The seat cushion length adjustment device 40 may further include a base bracket 8.

The extension part 50 includes an extension panel 51, a handle 52, and a panel guide 53.

The extension panel 51 is arrange | positioned so that it may draw out from the upper surface of the seat frame 11 front. Accordingly, the extension portion arranging region 111 is formed on the upper surface of the sheet frame 11. At least a portion of the upper surface of the extension panel 51 constituting the extension part arrangement region 111 penetrates the upper and lower through-holes 112 in the vertical direction. The upper and lower through holes 112 are formed long in the front and rear directions of the extension panel 51. The extension panel 51 may move within the upper and lower through holes 112.

The extension panel 51 is separated from the seat frame 11 and is extended forward from the seat frame 11 to extend the length of the seat cushion 10. Although not shown in the drawing, the extension panel 51 is wrapped with a cushioning material.

The handle 52 is disposed below the extension panel 51 and protrudes forward. When the seat cushion 10 occupant grasps the handle 52 and pulls the handle forward, the extension panel 51 is pulled out in front of the seat cushion 10 to extend the length of the seat cushion 10.

A plurality of panel guides 53 are arranged at intervals in the left and right directions in the extension part arranging region 111 and guide the extension panel 51 so that the extension panel 51 can be moved smoothly without moving forward. The panel guide 53 includes a rail 531 and a rail block 532.

The rail 531 is disposed in the front-rear direction on the upper surface of the sheet frame 11 constituting the extension part arranging region 111, and is disposed on both the left and right sides with the upper and lower through holes 112 interposed therebetween. The central portion of the rail 531 is in contact with the upper surface of the extension panel 51, and both left and right sides are spaced apart from the upper surface of the extension panel 51.

The rail block 532 is connected to the lower surface of the extension panel 51 and one side surrounds one side of the rail 531. Here, the left side rail block 532 surrounds the left side of the rail 531, and the right side rail block 532 surrounds the right side of the rail 531. By the rail blocks 532 on the left and right sides, the extension panel 51 may move smoothly in the front-rear direction without being shaken in the left-right direction.

The base bracket 8 and the tilting module 60 are disposed below the seat frame 11. The base bracket 8 supports the tilting module 60.

The base bracket 8 includes a bracket body 83, a coupling part 81, and a support part 82, and an installation space 8a in which the tilting module 60 is located is formed.

The coupling part 81 forms an upper side of the base bracket 8 and is connected to the horizontal bar 113 installed in the seat frame 11. However, the coupling portion 81 may be directly connected to the bottom of the seat frame 11.

Support portion 82 is located on a different line under the coupling portion (81). Support portion 82 and the coupling portion 81 is connected by the bracket body 83, the bracket body 83 is inclined. The lower surface of the tilting module 60 is coupled to the support portion 82 so that one side is in contact with the bracket body 83. One side of the tilting module 60 may be spaced apart from the bracket body 83 according to the movement of the extension unit 50.

The structure of the base bracket 8 is not particularly limited. If the structure can support the tilting module 60 may be variously changed.

The tilting module will be described with reference to FIGS. 7 to 11.

7 to 11, the tilting module 60 includes a connecting link 61, a tilting housing 62, and a ratchet driving unit 7, and the extension unit 50 includes a seat frame ( In step 11), it is withdrawn step by step and can be returned when the final withdrawal step is reached.

The tilting housing 62 includes a base link 621, a first support 623, a second support 624, a connector link 622, a first lower hinge pin 625a, a second lower hinge pin 625b, The first upper hinge pin 626a and the second upper hinge pin 626b may be formed to form an arrangement space 62a in which the ratchet driving unit 7 is positioned.

The base link 621 is disposed in the installation space 8a of the base 82 and is fixed to the inner surface of the base 82. The first lower hinge pin 625a is coupled to one side of the base link 621, and the second lower hinge pin 625b is coupled to the other side thereof. Base link 621 may be omitted. In this case, the first lower hinge pin 625a and the second lower hinge pin 625b may be coupled to the base bracket 8.

The first support 623 is located on one side of the base link 621 and the second support 624 is located on the other side of the base link 621 to face at intervals. The outer side of the second support 624 is in contact with the inner surface of the bracket body 83. However, the second support 624 may be spaced apart from the bracket body 83. An arrangement space 62a is formed between the first support 623 and the inner surface of the second support 624. The first support 623 and the second support 624 include support pieces 623a and 624a and wing pieces 623b and 624b formed by bending both sides of the support bodies 623a and 624a, respectively. Through-holes are formed on the upper side and the lower side of the wing pieces 623b and 624b, respectively.

The lower side of the first support 623 is connected to the first lower hinge pin 625a, and the lower side of the second support 624 is connected to the second lower hinge pin 625b. The first support 623 may move based on the first lower hinge pin 625a, and the second support 624 may move based on the second lower hinge pin 625b.

The connector link 622 connects the upper side of the first support 623 and the second support 624 to allow the first support 623 and the second support 624 to move together. One side of the connector link 622 is connected to the first support 623 by the first upper hinge pin 626a, and the other side is connected to the second support 624 by the second upper hinge pin 626b.

The tilting housing 62 may move based on the first lower hinge pin 625a and the second lower hinge pin 625b when the extension 50 moves. Accordingly, the outer surface of the second support 624 is spaced apart from the circumference of the installation space 8a of the bracket body 83 when the extension 50 is drawn out of the seat frame 11, and the extension 50 is circular. When it returns to a state, it contacts with the circumference of the installation space 8a.

The ratchet drive unit 7 includes a drive housing 71, a ratchet body 72, a stopper 73, a return elastic member 74, and a stopper elastic member 75 and are located in the placement space 62a to hold the handle 52. The extension panel 51 can be drawn out in stages when the panel is pulled out, and can be returned when the final stage of drawing is reached.

The drive housing 71 includes a housing body 711, a housing hinge 712, and a contact protrusion 713. The housing body 711, the housing hinge 712, and the contact protrusion 713 are integrally formed.

The slide space 711a penetrates up and down inside the housing body 711. An upper side of one surface of the housing body 711 facing the second support 624 protrudes in the direction of the second support 624, and a stopper space 711b connected to the slide space 711a is formed. The stopper space 711b is opened in the direction of the second support 624. The lower side of the housing body 711 has a contact portion 711d facing the support body 624a of the second support 624.

The contact protrusions 713 protrude toward the inner center from both inner side surfaces of the slide space 711a facing each other. Contact protrusions face each other at intervals.

The housing hinge 712 is connected to the lower end of the housing body 711 and has a through hole through which the second lower hinge pin 625b passes. The drive housing 71 may move with respect to the second lower hinge pin 625b.

The ratchet body 72 includes a ratchet bar 721, a first stopper engaging jaw 722a, a second stopper engaging jaw 722b, and a ratchet 723 and linearly moves in the slide space 711a.

The ratchet bar 721 has a predetermined length and is arranged to be linearly movable in the slide space 711a. The thickness of the ratchet bar 721 is smaller than the width of the slide space 711a and is in contact with the contact protrusion 713. The ratchet bar 721 may move linearly in the vertical direction without being shaken by the contact of the contact protrusion 713. When the outer surface of the ratchet bar 721 is in contact with the circumference of the slide space 711a, the contact protrusion 713 may be omitted.

At least a portion of the ratchet bar 721 is exposed outside the housing body 711. An exposed portion of the ratchet bar 721 is formed with a through hole through which the first upper hinge pin 626a penetrates. The ratchet bar 721 may move based on the first upper hinge pin 626a. The ratchet bar 721 moves from the inside of the housing body 711 to the outside according to the moving direction.

On the other hand, when the ratchet bar 721 moves to the outside, the lower end of the ratchet bar 721 does not go out of the lower range of the housing body 711 where the contact portion 711d is formed. The inner surface of the contact portion 711d is in contact with the lower surface of the ratchet bar 721.

The first stopper engaging jaw 722a and the second stopper engaging jaw 722b protrude in the direction of the second support 624 from the upper side and the lower side of one surface of the ratchet bar 721 facing the second support 624. . The first stopper engaging jaw 722a and the second stopper engaging jaw 722b are separated from each other. Here, the protruding length of the second stopper catching jaw 722b based on one surface of the ratchet bar 721 is longer than the protruding length of the first stopper catching jaw 722a.

The ratchet 723 protrudes from one side of the ratchet bar 721 in the direction of the second support 624 in the form of a toothed screw. The ratchet 723 has a bottom surface formed in a horizontal plane and the top surface formed in an inclined plane. The ratchet 723 is arranged in the direction of the second stopper engaging jaw 722b from the first stopper engaging jaw 722a, and is formed in plural. The protruding length of the ratchet 723 is shorter than the protruding length of the first stopper engaging jaw 722a based on one surface of the ratchet bar 721.

The ratchet body 72 is gradually exposed to the outside of the housing body 711 when the extension part 50 is pulled out, and from the outside of the housing body 711 to the slide space 711a when the extension part 50 returns. Move.

The stopper 73 is located in the stopper space 711b including the stopper body 731, the locking 732, and the locking jaw 733 to support the ratchet body 72 and the second support 624. ) Is placed between. The stopper 73 restricts the ratchet body 72 to be exposed in stages.

The stopper body 731 is located in the stopper space 711b and is coupled to the stopper hinge pin 73a penetrating through the stopper space 711b in the housing body 711. The stopper hinge pin 73a penetrates through the center portion of the stopper body 731. However, the stopper hinge pin 73a may be omitted. In this case, hinge protrusions protrude from both sides of the stopper body 731 to be coupled to the housing body 711. The stopper body 731 may move based on the stopper hinge pin 73a.

The hook 732 protrudes from the upper end of the stopper body 731 in the direction of the ratchet body 72 and is caught by the ratchet 723. The catch 732 is formed in a form in which the cross section becomes narrower from the stopper body 731 toward the ratchet body 72.

The upper surface of the latch 732 is formed parallel to the horizontal surface of the ratchet 723, and the lower surface is formed of an inclined surface corresponding to the inclined surface of the ratchet 723. When the ratchet body 72 is pulled out, the inclined surface of the catch 732 may be caught by the ratchet 723 in contact with the inclined surface of the ratchet 723. On the other hand, when the ratchet body 72 is moved into the housing body 711, the first stopper catching jaw 722a is caught by the catch 732, and the ratchet body 72 no longer moves inside the housing body 711. Do not.

The locking jaw 733 protrudes from the lower end of the stopper body 731 and the stopper body 731 in the direction of the ratchet body 72. The locking jaw 733 is in contact with the second stopper locking jaw 722b when the locking hook 732 is in contact with the first stopper locking jaw 722a. However, when the ratchet body 72 is drawn out of the housing body 711 so that the latch 732 is spaced apart from the first stopper locking jaw 722a, the locking jaw 733 is also spaced apart from the second stopper locking jaw 722b. . In addition, when the ratchet body 72 is pulled out to the maximum, the second stopper catching jaw 722b may contact the catching member 732.

The stopper elastic member 75 is disposed between the upper side of the stopper body 731 and the inner surface of the stopper space 711b. The stopper elastic member 75 is formed in a ring shape in which a part is open and protrudes vertically in the direction of the inner surface of the stopper space 711b from one side of the elastic ring 751 and the elastic ring 751 where elastic force is generated, and thus the housing body ( The body connecting portion 752 inserted into the body connecting hole 711c formed on the upper side of the inner surface of the 711 and the other side of the elastic ring 751 protrudes vertically in the direction of the stopper body 731 to the upper portion of the stopper body 731. And a stopper connecting portion 753 inserted into the formed stopper connecting hole 731a.

The stopper elastic member 75 applies an elastic force so that the upper side of the stopper body 731 can move in the direction of the ratchet body 72 based on the stopper hinge pin 73a. The hook 732 maintains the latched state of the ratchet 723 by the elastic force of the stopper elastic member 75.

The return elastic member 74 is formed of a coil spring, and when the extension part 50 is drawn out and positioned at the final stage, the elastic member 74 applies elastic force to the second support 624 so that the extension part 50 can be returned to its original state. do. The elastic modulus of the return elastic member 74 is larger than the elastic modulus of the stopper elastic member 75.

The return elastic member 74 is coupled to the second lower hinge pin 625b. One end 741 of the return elastic member 74 is in contact with the base link 621 and the other end 742 is located between the support body 624a of the second support 624 and the contact portion 711d. When the second support 624 moves with respect to the second lower hinge pin 625b by drawing out the extension 50, the other end 742 of the return elastic member 74 is the support body 624a of the second support 624. ) And apply an elastic force to the support body (624a). As the extension part 50 is drawn out, the other end of the return elastic member 74 further applies an elastic force to the support body 624a. When the extended extension part 50 reaches the final withdrawal step and the latch 732 contacts the second stopper engaging jaw 722b, the second support 624 is moved by the elastic force of the return elastic member 74 to the second. The lower hinge pin 625b may be moved around the installation space 8a of the base bracket 8.

The connecting link 61 includes a play bracket 611, a coupling block 612, and a connecting bar 613, and is disposed below the seat frame 11 to connect the extension panel 51 and the tilting housing 62.

The coupling block 612 is spaced apart from the tilting module 60 by being positioned in the seat frame 11 and coupled to the bottom surface of the extension panel 51 through the upper and lower through holes 112.

The clearance bracket 611 is positioned above the tilting housing 62 and is connected to the second upper hinge pin 626b. The clearance bracket 611 has a clearance hole 611a through which the second upper hinge pin 626b penetrates upward and downward. The clearance bracket 611 may move upward and downward within the clearance hole 611a in a state in which the second upper hinge pin 626b is located in the clearance hole 611a when the extension part 50 is drawn out.

The connection bar 613 has a predetermined length and connects the coupling block 612 and the clearance bracket 611.

However, the coupling block 612 and the connection bar 613 may be omitted. In this case, the upper surface of the clearance bracket 611 may be directly connected to the lower surface of the extension panel 51.

Accordingly, when the seat cushion 10 occupant grasps the handle 52 and pulls the extension part 50 forward, the force is transmitted through the coupling block 612, the connection bar 613, and the clearance bracket 611 to the second upper hinge. Delivered to pin 626b. The tilting housing 62 may move forward of the seat cushion 10 based on the first lower hinge pin 625a and the second lower hinge pin 625b. At this time, the ratchet body 72 is caught by the stopper 73 step by step and the extension part 50 is taken out step by step. When the extension unit 50 is positioned at the final stage, the extension unit 50 may return to its original state by the elastic force of the return elastic member 74.

Next, with reference to Figures 12 and 13 will be described the operation of the seat cushion length adjustment device described above.

FIG. 12A shows an extension part positioned in the seat frame as shown in FIG. 3, and FIG. 12B and FIG. 13C show an extension part drawn out from the seat frame. ) Shows a state in which the extension unit is finally drawn out from the seat frame and returned as shown in FIG. 14.

First, the seat cushion occupant can adjust the length of the seat cushion to fit his body. Hereinafter, the length of the seat cushion will be described as increasing.

When the extension panel 51 is located in the extension part arrangement area, the seated person grasps the handle and pulls the extension panel 51 forward, and the force is transmitted to the second upper hinge pin 626b through the link link 61. . In this case, as shown in FIG. 12A, the outer surface of the second support 624 is in contact with the base bracket 8. The hook 732 is located at the first end of the ratchet 723 and the other end 742 of the return elastic member 74 is in contact with the contact portion 711d. The first upper hinge pin 626a is located behind the imaginary vertical line 625L of the first lower hinge pin 625a. The stopper connection portion 753 is located in front of the imaginary vertical line 752L of the body connection portion 752.

Referring to b) of FIG. 12, when the extension panel 51 is continuously pulled, the inner surface of the play hole 611a contacts the outer surface of the second upper hinge pin 626b and the second upper hinge pin 626b is moved forward. Pull. The second upper hinge pin 626b is connected to the second support 624, and the second support 624 is connected to the first support 623 through the connector link 622 and the second upper hinge pin 626b. It is connected. Accordingly, the first support 623 rotates forward at the same time based on the first lower hinge pin 625a and the second support 624 is rotated forward based on the second lower hinge pin 625b. The outer surface of the second support 624 is spaced apart from the inner surface of the base bracket 8. In rotation, the first upper hinge pin 626a is close to an imaginary vertical line 626L of the first lower hinge pin 625a.

The ratchet drive unit 7 also rotates forward with respect to the second lower hinge pin 625b by the rotation of the first support 623. The ratchet body 72 is drawn out of the housing body 711 in the slide space 711a. The inclined surface of the latch 732 located at the first end of the ratchet 723 is in contact with the inclined surface of the ratchet 723 so that the ratchet body 72 is easily drawn out and the upper side of the stopper 73 is the stopper hinge pin 73a. Based on the rotation of the second support 624 in the opposite direction of rotation (rear). The catch 732 is drawn and positioned at the second end of the ratchet 723 by drawing out the ratchet body 72. Accordingly, the extension panel 51 may maintain the one-step draw state. The stopper connection portion 753 is close to the imaginary vertical line 752L of the body connection portion 752. If the hook 732 is located at the first end of the ratchet 723 and the extension panel 51 is not pulled, the hook 732 is caught at the second end by the elastic force of the stopper elastic member 75 and the hook ( The horizontal plane of the 732 is in contact with the horizontal plane of the ratchet 723 so that the ratchet body 72 does not move inside the housing body 711. Accordingly, the extension panel 51 maintains the one-step draw state. The contact portion 711d is spaced apart from the other end of the return elastic member 74 by the rotation of the second support 624.

If the extension panel 51 is continuously pulled while the latch 732 is positioned at the second end of the ratchet 723, the first support 623 and the second support 624 rotate forward with respect to the lower end, and the ratchet Body 72 is drawn out from the housing body 711 and the catch 732 is stepped on the ratchet 723. As a result, the extension panel 51 may be drawn out stepwise from the seat frame 11 as shown in FIG. 14 and the length of the seat cushion may increase.

Referring to c) of FIG. 13, when the extension claw 51 pulls the latch 732 at the last end of the ratchet 723, the latch 732 is in contact with the second stopper locking jaw 722b. The other end of the return elastic member 74 is in contact with the inner surface of the support body 624a of the second support 624. At this time, an elastic force is generated in the return elastic member 74 to rotate the second support 624 backward.

Referring to FIG. 13D of the drawing, for reference, when the movable member 51 is further pulled forward while the locking member 732 is positioned at the last end of the ratchet 723, the second stopper locking jaw 722b is locked. Lift the tooth 732. The upper side of the stopper 73 is rotated in the direction opposite to the rotation (rear) of the second support 624 relative to the stopper hinge pin 73a, so that the catch 732 is released from the last end.

The ratchet body 72 is maximally drawn out of the housing body 711 and the locking jaw 733 is in contact with the bottom surface of the ratchet body 72. The lower end of the ratchet body 72 is in contact with the inner surface of the contact portion 711d. The first upper hinge pin 626a is positioned in front of the virtual vertical line 752L of the first lower hinge pin 625a, and the stopper connecting portion 753 is rearward of the virtual vertical line 752L of the body connecting portion 752. Located in At this time, the stopper elastic member 75 applies an elastic force to the stopper body 731 to the elastic force to maintain the state in which the engaging portion 732 is lifted. The other end of the return elastic member 74 continuously applies an elastic force to the inner surface of the support body 624a of the second support 624.

When the force pulling the moving object 51 is removed in such a state, the second support 624 rotates backward based on the second lower hinge pin 625b by the elastic force of the return elastic member 74. The rotational force of the second support 624 is transmitted to the moving object 51 through the second upper hinge pin 626b and the connecting link 61 so that the moving object 51 returns to the upper part of the fixture 11.

When the second support 624 rotates backward, the ratchet body 72 moves inside the housing body 711, and the stopper connection portion 753 is located ahead of the virtual vertical line 752L of the body connection portion 752. Located. The stopper elastic member 75 exerts an elastic force so that the latch 732 is caught by the ratchet 723. Accordingly, the catch 732 is positioned at the first end of the ratchet 723 while contacting the first stopper catching jaw 722a and the outer surface of the second support 624 is in contact with the inner surface of the base bracket 8. .

Accordingly, since the extension part is drawn out step by step, the length of the seat can be adjusted step by step, and the user's usability is improved since the extension part is automatically returned by the elastic force of the return elastic member when returning to the seat frame.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1: Car seat 10: Seat cushion
11: Seat frame 111: Extension part arranging area
112: upper and lower through holes 113: horizontal bar
12: guide rail 13: horizontal frame
20: seatback 30: headrest
40: seat cushion length adjustment device 50: extension part
51: extension panel 52: handle
53: panel guide 531: rail
532: rail block 60: tilting module
61: connecting link 611: play bracket
611a: play hole 612: coupling block
613: connecting bar 62: tilting housing
62a: Placement Space 621: Base Link
622: connector link 623: first support
624: second support 623a, 624a: support body
623b and 624b: Wing piece 625a: 1st lower hinge pin
625b: first upper hinge pin 626a: second lower hinge pin
626b: second upper hinge pin
7: ratchet drive 71: drive housing
711: housing body 711a: slide space
711b: stopper space 711c: body connection hole
711d: contact 712: housing hinge
713: contact projection 72: ratchet body
721: ratchet bar 722a: first stopper engaging jaw
722b: second stopper engaging jaw 723: ratchet
73: stopper 731: stopper body
731a: stopper connection hole 732: jam
733: engaging jaw 73a: stopper hinge pin
74: return elastic member 741: one end
742: the other end 75: the stopper elastic member
751: elastic ring 752: body connection
753: stopper connection 8: base bracket
8a: installation space 81: coupling part
82: base 83: bracket body

Claims (12)

An extension part disposed on the seat frame and movable
Tilting module connected to the extension unit and controlling the movement of the extension unit
Including;
The extension unit may be withdrawn in the seat frame step by step under the control of the tilting module, and the extended extension unit may return to a state before being pulled out by the tilting module control in the final withdrawal step.
Seat cushion length adjustment device. In claim 1,
A base bracket connected to the seat frame and supporting the tilting module;
The upper end of the tilting module is connected to the extension part and the lower end is connected to the base bracket, and the tilting module is rotated step by step based on the lower end when the extension part is drawn out.
Seat cushion length adjustment device. In claim 2,
The tilting module,
A connection link connected to the extension unit;
A tilting housing connected to the connection link and connected to the base bracket so as to be pivotable and having an arrangement space;
The ratchet drive unit is located in the arrangement space and the lower end is connected to the base bracket and the upper end is connected to the connection link.
Including;
The ratchet drive unit has a length stepwise when the extension unit is drawn out
Seat cushion length adjustment device. In claim 3,
The tilting housing,
A base link disposed on the base bracket,
A first support connected to one side of the base link by a first lower hinge pin;
A second support connected to the other side of the base link by a second lower hinge pin;
A connector link connected to the first support by a first top hinge pin and connected to the second support by a second top hinge pin
Including;
The placement space is formed between the first support and the second support, the lower end of the ratchet drive unit is connected to the second lower hinge pin and the upper end is connected to the first upper hinge pin
Seat cushion length adjustment device. In claim 4,
The ratchet drive unit,
A drive housing having a slide space and a stopper space formed therein and connected to the second lower hinge pin;
A ratchet body disposed to be linearly movable in the slide space and connected to the first upper hinge pin;
A stopper disposed in the slide space and limiting a moving range of the ratchet body;
A return elastic member disposed below the drive housing and applying an elastic force to the second support;
A stopper elastic member for applying an elastic force to the stopper so that the stopper is in contact with the ratchet of the ratchet body.
Containing
Seat cushion length adjustment device. In claim 5,
The drive housing,
A housing body in which the slide space and the stopper space are formed;
A housing hinge connected to the housing body and through which the first lower hinge pin passes
Including;
The return elastic member is coupled to the second lower hinge pin so that one end is hung on the base link and the other end is located between the housing body and the second support.
Seat cushion length adjustment device. In claim 6,
The ratchet body,
A ratchet bar having an upper end connected to the first upper hinge pin and a lower end positioned in the slide space, the one end of which is in contact with the stopper;
A first stopper catching jaw, a second stopper catching jaw formed at intervals on one side of the ratchet bar;
A plurality of ratchets formed between the first stopper engaging jaw and the second stopper engaging jaw;
Containing
Seat cushion length adjustment device. In claim 7,
The stopper is,
A stopper body connected to the drive housing by a stopper hinge pin;
Protruding from the upper end of the stopper body toward the ratchet body and catching the ratchet;
A locking jaw protruding from the lower end of the stopper body toward the ratchet body and caught on the second stopper locking jaw;
Including;
The stopper elastic member is connected to one end of the stopper body, and the latching step is applied to the plurality of ratchets stepwise by linear movement of the ratchet body.
Seat cushion length adjustment device. In claim 4,
The connection link,
A clearance bracket connected to the second upper hinge pin and having a clearance hole through which the second upper hinge pin passes;
A coupling block connected to the extension part through the seat frame;
Connection bar connecting the coupling block and the clearance bracket
Including;
The clearance hole is formed in the clearance bracket up and down direction
Seat cushion length adjustment device. In claim 9,
The extension unit,
An extension panel disposed on the seat frame and movable and connected to the coupling block;
A handle formed in front of the extension panel;
A plurality of panel guides disposed between the extension panel and the seat frame
Containing
Seat cushion length adjustment device. In claim 10,
The panel guide,
A rail connected to the seat frame and
Rail block connected to the extension panel and movable along the rail
Containing
Seat cushion length adjustment device. A seat cushion length adjusting device as defined in any one of claims 1 to 11,
A seat cushion in which the seat cushion length adjusting device is disposed;
A seat back connected to the seat cushion and
Headrests disposed in the seatback
Car seat comprising a.

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