Seat rail for a vehicle

Abstract

Seat rail for a vehicle, comprising: a lock fixing bracket (53) fixed to a movable rail (52) and having a pair of mounting flanges (53a) provided thereon, the mounting flanges (53a) being spaced apart from each other in the forward / rearward direction of the vehicle; and a release lever (54) connected with the pair of support flanges (53a) therebetween so as to be elastically rotatable by a lever shaft (55) and a lever spring (56); wherein the lever shaft (55) is integrally connected to each of the support flanges (53a) by passing through the support flanges (53a) so that the lever shaft (55) cannot move in the forward / backward and left / right directions during operation of the release lever (54); wherein the lever spring (56) is connected to the lever shaft (55) such that a first end and a second end of the lever spring (56) are supported by the lock fixing bracket (53) and the unlocking lever (54), respectively, when the lever spring (56) is wound around the lever shaft (55); and wherein the release lever (54) has an insertion hole (62) into which the second end of the lever spring (56) is inserted, and a fixing hole (63) to which the second end of the lever spring (56) is held and fixed, wherein the insertion hole (62) and the fixing hole (63) are connected to each other by a connecting hole (64).

Description

Background of the inventionField of the invention

[0001] The present invention generally relates to a seat track for a vehicle. More specifically, the present invention relates to a seat track for a vehicle, wherein the seat track includes a release lever, and wherein a locking pin minimizes the jerking of the release lever, thereby improving the functionality of the locking pin by the release lever and significantly reducing the actuation noise of the release lever. Description of the state of the art

[0002] Generally, a seat for a vehicle is designed to slidably move in the forward / rearward direction of a vehicle using a seat rail. As shown in the Fig. 1 to 4, the seat rail extends in the forward / backward direction and comprises a fixed rail 1 intended to be fixed to a floor panel in the vehicle, and a movable rail 2 connected to the fixed rail 1 to slidably move along a longitudinal direction of the fixed rail 1.

[0003] Furthermore, the seat rail includes a locking device for limiting the forward / backward movement of the movable rail 2. The locking device includes an electrically driven type, which is operated by the power of a motor, and a manual type, which is manipulated by a user.

[0004] As a kind of manual type, a locking pin type which provides more precise operation because a plurality of locking pins operate independently, as shown in the drawings, includes a lock fixing bracket 3, a release lever 4, a lever shaft 5, a lever spring 6, a guide bracket 7, a plurality of locking pins 8 and a locking pin spring 9 provided for each of the locking pins 8.

[0005] The lock fixing bracket 3 is connected on an upper surface of the movable rail 2 so as to be fixed thereto, and includes opposing fixing flanges 3a provided thereon when the lock fixing bracket 3 is connected to the movable rail 2, the fixing flanges 3a projecting from an outer side of the movable rail 2 in a lateral direction thereof and being spaced apart from each other in the front / backward direction.

[0006] The release lever 4 is positioned between the bracket flanges 3a, the lever shaft 5 integrally passes through and is connected to the opposite bracket flanges 3a and the release lever 4 in the forward / backward direction, the lever spring 6 is wound around the lever shaft 5, a first end of the lever spring 6 being supported by the lock fixing bracket 3 and a second end thereof by the release lever 4.

[0007] The release lever 4 includes a manipulation part 4a and an actuation part 4b that contacts the locking pin 8. The manipulation part 4a, which protrudes to an outer side of the seat rail relative to the lever shaft 5, is actuated by a user. The actuation part 4b passes through the movable rail 2, with an end portion of the actuation part 4b positioned in the movable rail 2 and contacting the locking pin 8 to move the locking pin 8 during manipulation of the actuation part 4a.

[0008] When a user pushes down the release lever 4, the lever spring 6 is compressed, and when the pushed-down release lever 4 is released, the release lever 4 is returned to an initial position by a restoring force of the lever spring 6.

[0009] The guide bracket 7 is an L-shaped bracket, a first end of which is connected to an inner side surface of a side portion of the movable rail 2 to be fixed thereto, and a second end of which is provided to pass through an inner space of the movable rail 2 in the left / right direction of the seat rail.

[0010] The plurality of locking pins 8 are arranged one behind the other in the forward / backward direction, and each of the locking pins 8 is provided to pass through the fixed rail 1, the guide bracket 7, the movable rail 2, and the lock fixing bracket 3 in the vertical direction and move vertically. Opposite ends of the locking pin spring 9 are provided for support by the holder 10 and a locking pin flange 8a.

[0011] The holder 10 is provided on an inner side of the upper surface of the movable rail 2, wherein the locking pin flange 8a is provided so as to be fixedly connected to the locking pin 8.

[0012] However, like a conventional seat rail, each of the support flanges 3a to which the lever shaft 5 is connected is cut in an ascending direction on one side thereof to form an open hole 3b. Although the open hole 3b is formed to connect the lever shaft 5 to the support flange 3a, the jerking of the release lever 4 increases due to the open hole 3b during operation of the release lever 4, and as the jerking of the release lever 4 increases, the performance of the lock pin 8 deteriorates.

[0013] Furthermore, the movable rail 2 includes a window 11 provided on a side wall 2a thereof, and the operating part 4b of the release lever 4 is provided by passing through the window 11. In the conventional seat rail, a contact portion is widely distributed, resulting in high operating noise because a lower surface of the operating part 4b directly contacts a lower surface 11a of the window 11 upon operation of the release lever 4.

[0014] As in Fig. As shown in Figure 1, when the actuating part 4a of the release lever 4 is pressed down and released, the release lever 4 is returned to its original position by the restoring force of the lever spring 6. In this case, the underside of the actuating part 4b of the release lever 4 directly touches the underside 11a of the window 11, causing noise.

[0015] One in Fig. 4 denotes a horizontal width of the operating part 4b, and since the entire horizontal width D1 of the operating part 4b is in direct contact with the bottom surface 11a of the window 11, the contact portion is distributed over a large area, so that a loud operating sound is generated.

[0016] Furthermore, the second end of the lever spring 6 is configured to be supported by the release lever 4, whereas the conventional release lever 4 lacks a structure to which the second end of the lever spring 6 is held and fixed. Since the release lever 4 cannot be stably supported by the lever spring 6, the jerking of the release lever 4 increases during the operation of the release lever 4, and the functionality of the locking pin 8 deteriorates with the increasing jerking of the release lever 4.

[0017] A seat rail for a vehicle is disclosed, for example, in Korean patent KR 10 1 716 985 B1.

[0018] KR 10 2011 0 013 663 A also discloses a seat rail for a vehicle, which has a bracket attached to a movable rail with spaced flanges and a release lever rotatably mounted on the flanges via a shaft.

[0019] EP 0 812 721 A2 discloses a further seat rail in which a release lever is rotatably mounted between flanges attached to a movable rail, the release lever being pressed down to one side of the movable rail by a bow-shaped spring. Summary of the invention

[0020] For this reason, the present invention was made in consideration of the above-mentioned problems occurring in the prior art, with the aim of providing a seat rail for a vehicle, wherein the seat rail provided with a release lever and a locking pin minimizes a jerking of the release lever during an operation of the release lever in order to improve the operability of the locking pin by the release lever.

[0021] Moreover, the present invention intends to provide a seat rail for a vehicle, wherein, when the release lever is operated and returned to an initial position, the release lever comes into contact with and is stopped by a lock fixing bracket, in which case, if an area of ​​a contact portion of the release lever is minimized, the operation noise can be significantly reduced.

[0022] Furthermore, the present invention intends to propose a seat rail for a vehicle, wherein an end portion of a lever spring is configured to be fixed to the release lever by being held in the release lever, whereby the release lever can be stably installed by the lever spring, and wherein during the operation of the release lever, the jerking of the release lever is minimized to improve the operability of the locking pin by the release lever.

[0023] Against this background, the present invention provides a seat rail for a vehicle having the features of claim 1.

[0024] The seat rail according to the invention comprises: a lock fixing bracket fixed to a movable rail and having a pair of mounting flanges provided thereon, the mounting flanges being spaced apart from each other in the forward / backward direction of the vehicle; and a release lever connected with the pair of mounting flanges therebetween so as to be elastically rotatable through a lever shaft and a lever spring, the lever shaft being integrally connected to each of the mounting flanges by passing through the mounting flanges so that the lever shaft cannot move in the forward / backward and left / right directions during operation of the release lever.

[0025] According to the invention, the lever spring is connected to the lever shaft such that a first end and a second end of the lever spring are supported by the lock fixing bracket and the release lever, respectively, when the lever spring is wound around the lever shaft.

[0026] The support flange may include a shaft hole through which the lever shaft passes in the forward / backward direction, wherein an edge of the shaft hole is blocked by the support flange so as not to communicate with an outside, and wherein the lever shaft includes a head portion having a diameter larger than the shaft hole and a pressing portion provided at a first end and a second end thereof, respectively, so that the lever shaft is integrally connected to the support flanges.

[0027] The release lever may include lever flanges provided on opposite side portions thereof in the forward / backward direction, each of the lever flanges being bent in an upward direction, the lever flange being positioned on an inner side surface of the support flange so as to overlap with the support flange, the lever shaft being integrally connected to the support flanges by being guided through the pair of support flanges and the pair of lever flanges, the release lever being connected to the lever shaft to elastically rotate relative to the lever shaft.

[0028] The lever flange may be positioned between a manipulation part and an operating part of the release lever, wherein, when the release lever is rotated in a return direction by an elastic force of the lever spring, the lever flange may contact the lock fixing bracket and stop rotation of the release lever.

[0029] The movable rail may include a window provided on a side wall thereof, and the operating part of the release lever may be provided by passing through the window, wherein, when the lever flange stops its rotation by contacting the lock fixing bracket, the operating part of the release lever may be positioned in a space between a top of the window and a bottom thereof.

[0030] According to the invention, the release lever comprises an insertion hole into which the second end of the lever spring is inserted, and a fixing hole to which the second end of the lever spring is held and fixed, wherein the insertion hole and the fixing hole are connected to each other by a connecting hole.

[0031] A stop step may be provided between the insertion hole and the mounting hole so that the second end of the lever spring held in the mounting hole cannot move in the insertion hole.

[0032] According to the seat rail for a vehicle of the present invention, the lever shaft is configured to be integrally connected to the support flanges, thereby minimizing forward / backward and left / right jerking of the release lever when the release lever is operated, and improving the operability of the lock pin by reducing the jerking of the release lever.

[0033] Furthermore, according to the seat rail for a vehicle of the present invention, when the release lever is rotated in a return direction by the elastic force of the lever spring, the lever flange first contacts the lock fixing bracket, stopping rotation of the release lever. Accordingly, the operating part of the release lever is positioned in the space between the top surface of the window and its bottom surface. Accordingly, the bottom surface of the operating part of the release lever is prevented from coming into contact with the bottom surface of the window, thereby minimizing the contact area of ​​the release lever and significantly reducing the operating noise.

[0034] Furthermore, according to the seat rail for a vehicle of the present invention, the structure of the insertion hole, the connection hole, the mounting hole, and the stopper step provided on the release lever are used to hold the second end of the lever spring in the mounting hole. Accordingly, the release lever can be stably fixed by the lever spring, and jerking of the release lever during operation of the release lever can be minimized, thereby improving the operability of the locking pin by the release lever. Short description of the drawings

[0035] The foregoing and other objects, features and other advantages of the present invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings in which they are incorporated, in which: Fig. 1 is a front view illustrating a conventional seat rail; Fig. 2 and Fig. 3 are a perspective view and a front view, respectively showing states in which a fixed rail and a locking pin are protruded from the seat rail Fig. 1 are removed; Fig. 4 shows a perspective view and a plan view illustrating a conventional release lever; Fig. 5 a front view corresponding Fig. 1 is a view illustrating a seat rail according to the present invention; Fig. 6 and Fig. 7 are perspective views illustrating the seat rail according to the present invention; Fig. 8 is a front view illustrating a state in which a fixed rail and a locking pin are removed from the seat rail of Fig. 5 away; and Fig. 9 shows a perspective view and a plan view illustrating a release lever according to the present invention. Detailed description of the invention

[0036] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0037] As in the Fig. 5 to 9, the seat rail for a vehicle according to the present invention extends in the fore / aft direction of a vehicle and includes a fixed rail 51 provided for attachment to a floor panel in the vehicle, and a movable rail 52 connected to the fixed rail 51 to slidably move along a longitudinal direction of the fixed rail 51.

[0038] Furthermore, the seat rail includes a locking device for limiting the movement of the movable rail 52 in the forward / backward direction. As shown in the drawings, the manual locking device, which includes a release lever and the locking pin, includes a lock mounting bracket 53, the release lever 54, a lever shaft 55, a lever spring 56, the guide bracket 57, a plurality of locking pins 58, and a locking pin spring 59 provided for each of the locking pins 58.

[0039] The lock fixing bracket 53 is connected on an upper surface of the movable rail 52 so as to be fixed thereto, and includes opposing fixing flanges 53a provided thereon when the lock fixing bracket 53 is connected to the movable rail 52, the fixing flanges protruding from an outer side of the movable rail 52 in a lateral direction thereof and spaced apart from each other in the front / backward direction.

[0040] The release lever 54 is arranged between the support flanges 53a, the lever shaft 55 passes through the opposing support flanges 53a and the release lever 54 in the forward / backward direction to be integrally connected thereto. The lever spring 56 is wound around the lever shaft 55, a first end of the lever spring 56 being supported by the lock fixing bracket 53 and a second end thereof being supported by the release lever 54. When the release lever 54 rotates with respect to the lever shaft 55, the release lever 54 can be elastically rotated by an elastic force of the lever spring 56.

[0041] The lever shaft 55 is integrally connected to the support flanges 53a by passing through the support flanges 53a, so that the lever shaft 55 does not move in the forward / backward and left / right directions during the operation of the release lever 54.

[0042] That is, each of the support flanges 53a includes a shaft hole 53b through which the lever shaft 55 passes in the forward / backward direction, wherein an edge of the shaft hole is blocked by the support flange 53a so as not to communicate with an outside, but does not include an open hole on the support flange 53a unlike the conventional seat rail.

[0043] Accordingly, the lever shaft 55 includes a head portion 55a having a diameter larger than the shaft hole 53b, and a pressing portion 55b provided at a first end and a second end thereof, respectively, so that the lever shaft 55 is integrally connected to the support flanges 53a. Accordingly, due to the connected structure, the lever shaft 55 cannot perform shaft rotation with respect to the support flange 53a and can move in the forward / backward direction (arrow M11) and left / right direction (arrow M12).

[0044] Accordingly, when the release lever 54 is operated, the jerking of the release lever 54 in the forward / backward direction (the arrow M11) and in the left / right direction (the arrow M12) is minimized, and the functionality of the locking pin 58 is improved by reducing the jerking of the release lever 54.

[0045] The release lever 54 includes a manipulation part 54a and an actuation part 54b that contacts the locking pin 58. The manipulation part 54a, which projects to an outer side of the seat rail relative to the lever shaft 55, is actuated by a user. The actuation part 54b passes through the movable rail 52, with an end portion of the actuation part 54b positioned in the movable rail 52 and contacting the locking pin 58 to move the locking pin 58 during manipulation of the actuation part 54a.

[0046] When a user pushes the release lever 54 downwards, the lever spring 56 is compressed, and when the release lever 54 is pushed downwards, the release lever 54 is released by a restoring force of the lever spring 56, as shown in the Fig. 5 to 8, reset to an initial position.

[0047] Furthermore, the release lever 54 includes lever flanges 54c provided on opposite side portions thereof in the forward / backward direction, each of the lever flanges 54c being bent in the upward direction, the lever flange 54c being positioned on an inner side surface of the support flange 53a so as to overlap with the support flange 53a, and the lever shaft 55 being integrally connected to the support flanges 53a by passing through the pair of support flanges 53a and the pair of lever flanges 54c.

[0048] The lever flange 54c is formed to be positioned between the manipulation part 54a and the operation part 54b of the release lever 54, and when the release lever 54 is rotated in its return direction by the elasticity of the lever spring 56, the lever flange 54c contacts the lock fixing bracket 53 and the rotation of the release lever 54 stops.

[0049] That is, when a user pushes the release lever 54 downwards, the lever spring 56 is compressed, and when the release lever 54 is pushed downwards, the release lever 54 is released by a restoring force of the lever spring 56, as shown in the Fig. 5 to 8, is returned to an initial position. Accordingly, when the release lever 54 is rotated in the return direction by the elasticity of the lever spring 56, the lever flange 54c contacts the lock fixing bracket 53, and the rotation of the release lever 54 in the return direction stops.

[0050] Here, the movable rail 52 includes a window 61 provided on a side wall 52a thereof, and the operating part 54b of the release lever 54 is provided by passing through the window 61. As mentioned above, when the release lever 54 is rotated in the return direction by the elasticity of the lever spring 56, the lever flange 54c comes into contact with the lock holder 53 and the rotation of the release lever 54 stops. In this case, the operating part 54b of the release lever 54 is positioned in the space between an upper surface 61a of the window 61 and a lower surface 61b thereof, which can significantly reduce the operating noise compared to the conventional structure.

[0051] That is, when the release lever 54 is rotated in the return direction by the elastic force of the lever spring 56, the lever flange 54c first contacts the lock fixing bracket 53, and the return rotation of the release lever 54 stops before a lower surface of the operating part 54b of the release lever 54 comes into contact with the lower surface 61b of the window 61. Accordingly, when the lever flange 54c comes into contact with the lock fixing bracket 53, the operating part 54b of the release lever 54 is located in the space between the upper surface 61a of the window 61 and the lower surface 61b thereof.

[0052] According to the conventional structure, a lower surface of an operating part of an unlocking lever directly contacts a lower surface of a window, and loud operating noise occurs due to a large contact area.

[0053] However, according to the embodiment of the present invention, when the release lever 54 is rotated to return to an initial position, the lever flanges 54c first contact the lock fixing bracket 53, and the rotation of the release lever 54 stops. Accordingly, the operating part 54b of the release lever 54 is positioned in a space between the upper surface 61a of the window 61 and its lower surface 61b, thereby preventing the lower surface of the operating part 54b of the release lever 54 from contacting the lower surface 61b of the window 61, which promotes minimizing a contact area of ​​the release lever 54 and thus reducing operating noise.

[0054] The guide bracket 57 is an L-shaped bracket having a first end connected to an inner side surface of a side portion of the movable rail 52 to be fixed thereto, and a second end thereof provided to pass through an inner space of the movable rail 52 in the left / right direction of the seat rail.

[0055] The plurality of locking pins 58 are arranged one behind the other in the forward / backward direction, with each of the locking pins 58 being provided to pass through the fixed rail 51, the guide bracket 57, the movable rail 52, and the lock fixing bracket 53 in the vertical direction and move vertically. Opposite ends of the locking pin spring 59 are provided for support by the holder 60 and a locking pin flange 58a.

[0056] The holder 60 is provided on an inner side of the upper surface of the movable rail 52, and the locking pin flange 58a is provided so as to be fixedly connected to the locking pin 58.

[0057] Furthermore, the release lever 54 according to the embodiment of the present invention includes an insertion hole 62 into which the second end of the lever spring 56 is inserted, and a fixing hole 63 to which the second end of the lever spring 56 is held and fixed, the insertion hole 62 and the fixing hole 63 being connected to each other by a connecting hole 64. Specifically, a stopper step 65 is provided between the insertion hole 62 and the fixing hole 63 so that the second end of the lever spring 56 held in the fixing hole 63 cannot move within the insertion hole 62.

[0058] The conventional release lever lacks a structure to hold an end portion of a lever spring for fastening. Since the release lever cannot be stably provided by the lever spring, the release lever jerk increases when the release lever is operated, and the functionality of a locking pin deteriorates as the jerk of the release lever increases.

[0059] On the contrary, according to the structure of the present invention, the second end of the lever spring 56 is inserted into the insertion hole 62 (P1 in Fig. 9) of the release lever 54, wherein the second end of the lever spring 56 inserted into the insertion hole 62 moves along the connecting hole 64 (arrow M13), and finally, the second end of the lever spring 56 is held and fixed in the mounting hole 63. Accordingly, the second end of the lever spring 56 inserted in the mounting hole 63 (P2 in Fig.9) is supported by the stop step 65 and cannot move in the insertion hole 62.

[0060] Accordingly, according to the embodiment of the present invention, the structures of the insertion hole 62, the connection hole 64, the mounting hole 63, and the stopper step 65 are used on the release lever 54 to hold the second end of the lever spring 56 in the mounting hole 63. Accordingly, the release lever 54 can be stably provided by the lever spring 56, and during the operation of the release lever 54, the jerking of the release lever 54 can be minimized, which improves the operability of the locking pin 58 by the release lever 54.

[0061] As described above, according to the embodiment of the present invention, the lever shaft 55 is integrally connected to the support flanges 53a, whereby the jerking of the release lever 54 in the forward / backward and left / right directions when the release lever 54 is operated can be minimized, and by reducing the jerking of the release lever 54, the operability of the lock pin 58 can be improved.

[0062] Furthermore, according to the seat rail of the present invention, when the release lever 54 rotates in its return direction due to the elasticity of the lever spring 56, the lever flange 54c first contacts the lock fixing bracket 53, and the rotation of the release lever 54 stops. Accordingly, the operating part 54b of the release lever 54 is positioned in the space between the upper surface 61a of the window 61 and the lower surface 61b thereof, thereby preventing the lower surface of the operating part 54b of the release lever 54 from coming into contact with the lower surface 61b of the window 61b, which promotes minimizing the contact area of ​​the release lever 54 and reducing operating noise.

[0063] Furthermore, the present invention uses the structures of the insertion hole 62, the connection hole 64, the fixing hole 63, and the stopper step 65 provided on the unlocking lever 54 to hold the second end of the lever spring 56 in the fixing hole 63 to be fixed thereto, whereby the unlocking lever 54 can be stably installed due to the lever spring 56, the jerking of the unlocking lever 54 during the operation of the unlocking lever 54 is minimized, and the operability of the locking pin 58 by the unlocking lever 54 is improved. Reference symbol 1.51 fixed rail 2, 52 movable rail 2a, 52a side wall 3, 53 Locking mounting bracket 3a, 53a mounting flanges 4, 54 release lever 4a, 54a Manipulation part 4b, 54b operating part 5.55 lever shaft 6, 56 lever spring 7, 57 guide bracket 8, 58 locking pins 8a, 58a locking pin flange 9, 59 Locking pin spring 53b Shaft hole 54c lever flanges 55a Headboard 55b Pressed part 60 holders 61 windows 61a Top of the window 61b Bottom of the window 62 insertion hole 63 mounting hole 64 connecting hole 65 stop level M11 Arrow M12 Arrow M13 Arrow

Claims

[1] Seat rail for a vehicle, comprising: a lock fixing bracket (53) fixed to a movable rail (52) and having a pair of mounting flanges (53a) provided thereon, the mounting flanges (53a) being spaced apart from each other in the forward / rearward direction of the vehicle; and a release lever (54) connected with the pair of support flanges (53a) therebetween so as to be elastically rotatable by a lever shaft (55) and a lever spring (56); wherein the lever shaft (55) is integrally connected to each of the support flanges (53a) by passing through the support flanges (53a) so that the lever shaft (55) cannot move in the forward / backward and left / right directions during operation of the release lever (54); wherein the lever spring (56) is connected to the lever shaft (55) such that a first end and a second end of the lever spring (56) are supported by the lock fixing bracket (53) and the unlocking lever (54), respectively, when the lever spring (56) is wound around the lever shaft (55); and wherein the release lever (54) has an insertion hole (62) into which the second end of the lever spring (56) is inserted, and a fixing hole (63) to which the second end of the lever spring (56) is held and fixed, wherein the insertion hole (62) and the fixing hole (63) are connected to each other by a connecting hole (64). [2] Seat rail according to claim 1, wherein the support flange (53a) comprises a shaft hole (53b) through which the lever shaft (55) passes in the forward / backward direction, wherein an edge of the shaft hole (53b) is blocked by the support flange (53a) so as not to communicate with an outside, and the lever shaft (55) comprises a head part (55a) having a diameter larger than the shaft hole (53b), and a pressing part (55b) provided at each of a first end and a second end of the lever shaft (55), so that the lever shaft (55) is integrally connected to the support flanges (53a). [3] Seat rail according to claim 1, wherein the release lever (54) comprises lever flanges (54c) provided on opposite side portions thereof in the forward / backward direction, each of the lever flanges (54c) being bent in an upward direction, the lever flange (54c) being positioned on an inner side surface of the support flange (53a) so as to overlap with the support flange (53a), the lever shaft (55) is integrally connected to the support flanges (53a) by being guided through the pair of support flanges (53a) and the pair of lever flanges (54c); and the release lever (54) is connected to the lever shaft (55) in order to rotate elastically relative to the lever shaft (55). [4] The seat rail according to claim 3, wherein the lever flange (54c) is positioned between a manipulation part (54a) and an operation part (54b) of the release lever (54), wherein when the release lever (54) is rotated in a return direction by an elastic force of the lever spring (56), the lever flange (54c) contacts the lock fixing bracket (53) and stops rotation of the release lever (54). [5] Seat rail according to claim 4, wherein the movable rail (52) comprises a window (61) provided on a side wall thereof, and the actuating part (54b) of the release lever (54) is provided by passing through the window (61), wherein, when the lever flange (54c) stops its rotation by contacting the lock fixing bracket (53), the operating part (54b) of the unlocking lever (54) is positioned in a space between an upper surface (61a) of the window (61) and a lower surface (61b) thereof. [6] Seat rail according to claim 1, wherein a stop step (65) is provided between the insertion hole (62) and the fastening hole (63) so that the second end of the lever spring (56) held in the fastening hole (63) cannot move in the insertion hole (62).

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