KR102350615B1 - Locking Device Of Vehicle Seat Rail - Google Patents

Abstract

The present invention relates to a locking device for a seat rail for a vehicle, wherein a plurality of locking holes formed in a front-rear direction of a vehicle on a low rail fixed to the floor of a vehicle and an upper rail movably coupled to the low rail are coupled to move up and down and a locking pin assembly having a plurality of locking pins fitted in some of the plurality of locking holes, an operation lever coupled to the upper rail and moving the plurality of locking pins up and down, fixed to the low rail and communicating with the plurality of locking holes, respectively and a reinforcing member having a plurality of through-holes that become It is possible to prevent the locking pin from moving toward the front of the vehicle by the member to prevent it from being separated, thereby protecting the occupant from further injury.

Description

Locking Device Of Vehicle Seat Rail

The present invention relates to a locking device for a seat rail for a vehicle, and more particularly, to a locking device for a seat rail for a vehicle capable of preventing a locking pin inserted into a locking hole of a low rail from falling out when a vehicle collides.

In general, a seat rail is to move a seat in the front-rear direction of a vehicle, and includes a low rail fixed to an indoor floor, and an upper rail moving in the front-rear direction of the vehicle along the low rail and to which the seat cushion is coupled.

The seat rail further includes a locking device for temporarily fixing the upper rail with respect to the low rail. The locking device serves to secure the seat to the seat rail in an appropriate position after moving the seat forward and backward so that the occupant is not uncomfortable when seated on the seat.

An example of such a conventional seat rail locking device is shown in FIG.

As shown, the conventional seat rail locking device includes a locking pin assembly 1 coupled to an upper rail (not shown), and a low rail 2 so that the locking pin 11 of the locking pin assembly 10 is fitted. It is configured to include a plurality of locking holes (2a) formed in the, and an operation unit (not shown) coupled to the upper rail to operate the locking pin 11 of the locking pin assembly (10).

In the locking pin assembly 10 , a plurality of locking pins 11 are fixed to the upper rail by a locking guide 1 , and the plurality of locking pins 11 are coupled to be movable up and down by an operation unit. The plurality of locking pins 11 are supported elastically by the elastic member 12 to move toward the locking hole 2a. That is, the elastic member 12 generates an elastic force when the locking pin 11 moves upwards and separates from the locking hole 2a when the seat is unlocked, and moves the locking pin 11 toward the locking hole 2a during locking. make it move

In the conventional seat rail locking device as described above, at least one locking pin 11 of a plurality of locking pins 11 is inserted into the locking hole 2a when the seat rail is locked so that the upper rail is locked against the low rail (2). become stationary.

First, one locking pin (11) in close contact with the inner circumferential surface of the locking hole (2a) on the front side of the vehicle when a vehicle collides in a state where one of the locking pins (11) is inserted into the locking hole (2a). 11), deformation occurs while the load is concentrated, and when the collision load of the vehicle is large, the locking pin 11 is deformed and separated from the locking hole 2a.

In order to solve this problem, in the case of a seat rail locking device in which two locking pins 11 of a plurality of locking pins 11 are respectively fitted into the locking holes 2a, one lock of the two locking pins 11 is When a vehicle collision occurs in a state in which the kingpin 11 is supported in close contact with the inner circumferential surface of the locking hole 2a at the front of the vehicle, the locking pin 11 in close contact with the inner circumferential surface of the locking hole 2a moves toward the front of the vehicle. As it is pushed, deformation is generated and the other locking pin 11 is configured to be supported on the inner circumferential surface of the locking hole 2a.

However, the locking structure of the seat rail as described above has a limit in increasing the locking strength, and when the locking pin 11 is tilted due to deformation due to impact and the locking pin 11 is excessively deformed, the locking pin in the locking hole 2a (11) will cause the problem to fall out.

Accordingly, a new solution for preventing the locking pin 11 from being pulled out from the locking hole 2a was required.

Korean Patent Publication No. 10-2005-0083356

Therefore, according to the present invention, a reinforcing member for reinforcing strength is coupled to a low rail having a locking hole into which the locking pin is inserted, thereby inducing multi-step deformation to minimize the deformation of the locking pin, thereby preventing the locking pin from being separated. An object of the present invention is to provide a locking device for a seat rail for a vehicle.

The present invention for achieving the above object is coupled to move up and down to a plurality of locking holes formed in the front-rear direction of the vehicle on a low rail fixed to the vehicle floor, and an upper rail movably coupled to the low rail, A locking pin assembly having a plurality of locking pins fitted in some of the plurality of locking holes, an operation lever coupled to the upper rail and moving the plurality of locking pins up and down, and fixed to the low rail and communicating with the plurality of locking holes, respectively A reinforcing member having a plurality of through-holes; but, the reinforcing member is characterized in that an extension hole extending to each of the plurality of through-holes is formed.

In addition, it is preferable that the extension hole is formed in the front side of the vehicle from the front inner circumferential surface of the vehicle in the extension hole to which the front locking pin of the vehicle contacts among the plurality of locking pins.

In addition, it is preferable that the extension hole is formed to have a width smaller than a diameter of the locking pin.

According to the present invention, even if the locking hole is deformed by the locking pin in the event of a vehicle collision, the locking pin is prevented from moving toward the front of the vehicle by the reinforcing member to prevent separation, thereby protecting passengers from further injuries. .

1 is a cross-sectional view showing a conventional seat rail locking structure.
Figure 2 is a bottom perspective view showing a structure for reinforcing the strength of the seat rail according to an embodiment of the present invention.
3 is a cross-sectional view schematically illustrating a structure of reinforcing the strength of the seat rail of FIG. 2 .
4 to 5 are cross-sectional views sequentially illustrating deformation due to a vehicle collision in the structure for reinforcing the strength of a seat rail according to an embodiment of the present invention.

Detailed embodiments for carrying out the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification.

FIG. 2 is a bottom perspective view showing a structure for reinforcing the strength of a seat rail according to an embodiment of the present invention, and FIG.

4 to 5 are cross-sectional views sequentially illustrating deformation due to a vehicle collision in the structure for reinforcing the strength of a seat rail according to an embodiment of the present invention.

First, the seat rail includes a low rail fixed to the floor of the vehicle in the front-rear direction of the vehicle, an upper rail coupled movably above the low rail and coupled to the lower portion of the seat, and the upper rail is not moved with respect to the low rail. It is configured to include a locking device for locking the upper rail.

2 to 5 , the locking device for a vehicle seat rail according to an embodiment of the present invention includes a plurality of locking holes 102 formed in the low rail 101 in the front and rear directions of the vehicle, and the upper and lower portions of the upper rail. A locking pin assembly 110 composed of a plurality of locking pins 111 that are movably coupled and fit into at least one locking hole 102 among the plurality of locking holes 102, and the plurality of locking pins 111 vertically A reinforcing member 120 fixed to the low rail 101 and communicated with the locking hole 102 and provided with a through hole 121 larger than the locking hole 102 toward the front of the vehicle. is comprised of

First, the plurality of locking holes 102 are formed on the low rail 101 in the front-rear direction of the vehicle, and are formed at regular intervals. Here, one locking hole 102 is a long hole formed long in the front-rear direction of the vehicle so that one locking pin 111 of the plurality of locking pins 111 can be fitted and flowed in the front-rear direction of the vehicle.

The locking pin assembly 110 is movably coupled up and down from the lower side of the upper rail ( ) to temporarily fix the upper rail to the low rail 101 in order to set the position of the seat, and a plurality of locking pins 111 . And, a coupling bracket (not shown) for vertically movably coupling the plurality of locking pins 111 to the upper rail, and an elastic member 112 for elastically supporting the plurality of locking pins 111, respectively. That is, the locking pin assembly 110 is coupled to the upper rail between the low rail 101 and the upper rail, and moves together with the upper rail when the upper rail moves.

The plurality of locking pins 111 are generally composed of three or four, but the number is not limited, and in the embodiment of the present invention, three or four are exemplified.

The coupling bracket is fixed to the upper rail, and serves to movably support the plurality of locking pins 111 with respect to the upper rail so that the plurality of locking pins 111 can move up and down on the upper rail.

The elastic member 112 is fitted to each of the plurality of locking pins 111 to elastically support the locking pins 111 to the upper rail. The elastic member 112 generates elastic force during the unlocking operation of the locking device so that the lower end of the locking pin 111 is pushed toward (lower side) the low rail 101 so that the lower end of the locking pin 111 is inserted into the locking hole 102 of the low rail 101 . do. That is, the elastic member 112 generates an elastic force while compressing while the locking pin 111 is moved upward when the locking device is unlocked, that is, generated when the locking device is unlocked when the seat is fixed, that is, when the locking device is locked. The locking pin 111 is pushed toward the low rail 101 by elastic force.

Here, the elastic member 112 is fitted to the outer periphery of the locking pin 111 so that the lower end is supported by the locking protrusion formed in the middle of the outer periphery of the locking pin 111 , and the upper end is configured to be supported by the lower surface of the upper rail.

The reinforcing member 120 is inserted into the locking hole 102 of the low rail 101 so that the penetrating locking pin 111 passes through the plurality of through holes communicating with the plurality of locking holes 102 of the low rail 101 ( 121), is formed to a predetermined length and fixed to the low rail 101 in the longitudinal direction. Specifically, the reinforcing member 120 is fixed to the low rail 101 in the longitudinal direction, and is fixed to the lower surface of the low rail 101 by welding or a separate fastening member. In addition, the reinforcing member 120 may be configured by being fixed to the upper surface of the low rail 101 by welding or by using a separate fastening member.

The reinforcing member 120 prevents the locking hole 102 of the low rail 101 from being deformed more than a certain amount when the seat is pulled toward the front of the vehicle during a vehicle collision, so that the locking pin 111 inserted into the locking hole 102 is prevent escape.

In the through hole 121 of the reinforcing member 120, an extension hole 122 extending toward the front of the vehicle from the inner circumferential surface of the locking hole 102 at the front of the vehicle to which the locking pin 111 is closely supported when the locking device is locked. is formed

That is, the extension hole 122 is formed toward the front of the vehicle from the vehicle front inner circumferential surface in the through hole 121 in which the locking pins 111 on the front side of the vehicle are fitted and in close contact with the plurality of locking pins 111 .

That is, an extension hole 122 extending toward the front of the vehicle is formed in the through hole 121 of the reinforcing member 120 , so that the locking pin supported on the inner circumferential surface of the front locking hole 102 of the vehicle when the vehicle collides. As the inner circumferential surface of the front locking hole 102 of the vehicle is deformed by the impact by 111, the extension hole expands when moving toward the front of the vehicle to block the locking pin, thereby preventing the inner circumferential surface of the front locking hole 102 of the vehicle. It prevents the locking pin 111 from being pulled out from the locking hole 102 while preventing further deformation.

In addition, as shown in FIG. 5 , the locking pin 111 that receives the load first when the vehicle collides, that is, the locking pin 111 positioned at the front of the vehicle among the plurality of locking pins 111 is deformed to be deformed. Another locking pin 111 that is fitted into the other locking hole 102 at the same time as contacting the inner peripheral surface of the locking hole 102 on the front side of the vehicle and the inner peripheral surface of the through hole 121 of the reinforcing member to the locking pin 111 is locked It is configured to be supported while being in contact with the vehicle front inner circumferential surface of the hole 102 .

The action between the reinforcing member 120 and the locking pin 111 at the time of locking and a collision accident in the seat rail locking device according to an embodiment of the present invention having the above configuration will be briefly described.

First, some of the locking pins 111 among the plurality of locking pins 111 in which the seat on which the occupant is seated is in a locked state while driving of the vehicle. 102), so that the seat does not move, it is in a locked state.

At this time, the vehicle front side locking pin 111 of the two locking pins 111 inserted into the locking hole 102 is supported on the front inner circumferential surface of the vehicle front side locking hole 102 so that the seat rail is in a locked state. will do

Thereafter, when the vehicle collides, the vehicle is tilted forward and the load of the seat acts toward the front of the vehicle, and thereby the locking pin 111 fitted in the locking hole 102 also acts toward the front of the vehicle. Then, the front locking pin 111 moves toward the front of the vehicle while deforming the locking hole 102 and the extension hole 122 of the through hole 121 and is supported while being in close contact with the extension hole 121 . Here, the locking pin 111 is simultaneously supported at two points on the inner circumferential surface of the locking hole 102 and the inner circumferential surface of the extension hole 122 of the low rail 101 . And, as shown in FIG. 4, as the locking pin 111 supported at two points is bent toward the rear of the vehicle as shown in FIG. 5 due to deformation, the locking pin 111 is moved a little further toward the front of the vehicle. Then, as the other locking pin 111 inserted into the locking hole 102 is supported on the front inner circumferential surface of the locking hole 102 while also moving, the locking pin assembly is supported by the low rail 101 at three points, so that the locking pin 111 is supported. It is to be prevented from falling out of the locking hole (102).

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art can make various modifications and equivalent other embodiments therefrom. You will understand that it is possible. Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

101: low rail
102: locking hole
110: locking pin assembly
111: locking pin
112: elastic member
120: reinforcing member
121: through hole
122: extension hole

Claims (3)

A plurality of locking holes formed in the front-rear direction of the vehicle in the low rail fixed to the vehicle floor;
A locking pin assembly coupled to an upper rail movably coupled to the low rail to move up and down and having a plurality of locking pins fitted in some of the plurality of locking holes;
an operating lever coupled to the upper rail and moving the plurality of locking pins up and down;
A reinforcing member fixed to the low rail and having a plurality of through holes respectively communicating with the plurality of locking holes;
The reinforcing member includes extension holes each extending from the plurality of through-holes and having a width smaller than the diameter of the locking pin,
When a collision occurs in the vehicle while the locking pin is inserted into the locking hole, the locking pin moves to the front of the vehicle while deforming the locking hole. A locking device for a vehicle seat rail, characterized in that it becomes.
According to claim 1,
extension hole,
A locking device for a vehicle seat rail, characterized in that it is formed from an inner circumferential surface on the front side of the vehicle toward the front of the vehicle in an extension hole where the locking pins on the front side of the vehicle come into contact with among the plurality of locking pins.

delete

Images