JP4750528B2 - Seat track locking mechanism - Google Patents

Description

  The present invention relates to a seat track locking mechanism that prohibits the movement of the upper rail of a seat track that includes a lower rail provided on a floor side and an upper rail provided on a seat side and movably engaged with the lower rail.

  An example of a seat track locking mechanism is shown in FIG. In the figure, the seat track 1 includes a lower rail 3 provided on the floor side, and an upper rail 5 provided on the seat side and engaged with the lower rail 3 so as to be movable in the direction of arrow A.

  The lock mechanism 11 that prohibits the movement of the upper rail 5 of the seat track 1 is provided at the bottom of the lower rail 3 so as to be movable relative to the upper rail 5 and a plurality of lock holes 13 formed along the movement direction (arrow A direction). And has a lock lever 17 in which three lock teeth 15 that can be engaged and disengaged are formed in the lock hole 13. Further, the lock lever 17 is connected to an operation lever 19 whose middle portion is rotatably attached to the upper rail 5, and the lock teeth 15 can be engaged with and disengaged from the lock hole 13 by moving the operation lever 19. . Further, the operating lever 19 is urged in the direction in which the lock teeth 15 are engaged with the lock holes 13 by the urging force of the spring 21 with one end engaged with the upper rail 5 and the other end engaged with the operation lever 19. Yes (locked).

  Therefore, when the operation lever 19 is not operated, the lock teeth 15 of the lock lever 17 are engaged with the lock holes 13 by the urging force of the spring 21, and the movement of the upper rail 5 is prohibited. When the operation lever 19 is operated against the urging force of the spring 21, the lock tooth 15 of the lock lever 17 is detached from the lock hole 13, and the upper rail 5 is movable with respect to the lower rail 3 (unlocked state). .

Here, when the lock mechanism 11 is in the locked state, as shown in FIG. 6, the three lock teeth 15 formed on the lock lever 17 are not generated between the lock lever 17 and the lock hole 13. Of these, the side wall surface of the central locking tooth 15 ′ is a tapered surface 15a ′ (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-315822 (FIGS. 1 and 3)

  However, in the lock mechanism 11 of the seat track 1 as shown in FIGS. 5 and 6, there is no backlash between the lock lever 17 and the lock hole 13 (lower rail 3) when in the locked state. However, backlash still occurs between the lock lever 17 and the upper rail 5.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to provide a seat track locking device in which there is no backlash between the lock lever and the lower rail and between the lock lever and the upper rail in the locked state. There is to do.

  The invention according to claim 1 for solving the above-described problem prohibits the movement of the upper rail of a seat track including a lower rail provided on the floor side and an upper rail provided on the seat side and movably engaged with the lower rail. In the seat track locking mechanism, one of the lower rail and the upper rail has a plurality of lock holes formed along the moving direction, and the lower rail and the other rail of the upper rail have the A first lock formed with a shaft provided along the moving direction of the upper rail, and a first lock tooth provided so as to be movable in at least one direction along the shaft and detachable from the lock hole A lever and the first lock lever are biased in a direction in which the first lock teeth engage with the lock hole. 1 biasing means and a rail provided with the shaft so that the first lock lever can come into contact therewith, and when it comes into contact, the one direction along the shaft of the further first lock lever And a second lock lever provided with a second locking tooth that is movable in at least the other direction along the shaft and that can be engaged with and disengaged from the lock hole. A second urging means for urging the second lock lever in a direction in which the second lock teeth engage with the lock hole, and a rail provided with the shaft. And a second stopper for prohibiting further movement of the second lock lever in the other direction along the shaft when the lever is brought into contact with the first lock teeth. The other side wall of the When one lock tooth engages with the lock hole, a first taper is generated such that a component force is generated that abuts against the other side wall surface of the lock hole and moves the first lock lever in one direction. A surface is formed on one side wall surface of the second lock tooth, and when the second lock tooth engages with the lock hole, the one side wall surface of the lock hole comes into contact with the first wall surface. The seat track locking mechanism is characterized in that a second tapered surface is formed so as to generate a component force that moves the second locking lever in the other direction.

  Usually, the first lock teeth of the first lock lever and the second lock teeth of the second lock lever are engaged with the lock holes by the urging force of the first urging means and the second urging means. However, the movement of the upper rail relative to the lower rail is prohibited (locked state).

  At this time, the tapered surface formed on the other side wall surface of the lock teeth of the first lock lever abuts on one side wall surface of the lock hole, and the first lock lever moves in one direction. To abut against the first stopper.

  In addition, the tapered surface formed on one side wall surface of the lock teeth of the second lock lever abuts on the other side wall surface of the lock hole, and the second lock lever moves in the other direction. Abuts on the second stopper.

  Here, the first lock teeth of the first lock lever and the second lock teeth of the second lock lever are locked into the lock holes against the urging force of the first urging means and the second urging means. When further separated, the upper rail can move with respect to the lower rail.

  According to a second aspect of the present invention, there is provided a seat track according to the first aspect, wherein brackets for supporting both end sides of the shaft are provided, and the first stopper and the second stopper are formed on the bracket. It is a locking mechanism.

  According to the first and second aspects of the invention, when the first lock tooth engages with the lock hole on the other side wall surface of the first lock tooth, A first tapered surface is formed so as to generate a component force that abuts the side wall surface and moves the first lock lever in one direction, and is formed on one side wall surface of the second lock tooth. When the second lock tooth engages with the lock hole, a second force is generated that abuts against one side wall surface of the lock hole and moves the second lock lever in the other direction. Since the second tapered surface is formed, the first tapered surface of the first lock tooth of the first lock lever comes into contact with one side wall surface of the lock hole in the locked state, and the first The lock lever moves in one direction and contacts the first stopper. The second taper surface of the second lock tooth of the second lock lever is in contact with the other side wall surface of the lock hole, and the second lock lever moves in the other direction to become the second stopper. Abut.

  The first taper surface of the other side wall surface of the first lock tooth of the first lock lever comes into contact with the one side wall surface of the lock hole, whereby one side wall surface of the first lock tooth The taper surface is in contact with the lock hole, and there is no backlash between the first lock lever and the rail in which the lock hole is formed (either the upper rail or the lower rail). In addition, the first lock lever moves in one direction and comes into contact with the first stopper, whereby the first lock lever and the rail provided with the first stopper (the other of the upper rail and the lower rail). The backlash with the rail) is gone.

  The second taper surface of the other side wall surface of the second lock tooth of the second lock lever comes into contact with the other side wall surface of the lock hole, so that the other side wall surface of the second lock tooth. The taper surface is in contact with the lock hole, and there is no play between the second lock lever and the rail in which the lock hole is formed (either the upper rail or the lower rail). In addition, the second lock lever moves in the other direction and comes into contact with the second stopper, whereby the second lock lever and the rail provided with the second stopper (the other of the upper rail and the lower rail). The backlash with the rail) is gone.

Therefore, there is no backlash between the lock lever and the lower rail and between the lock lever and the upper rail in the locked state.
According to the invention which concerns on Claim 2, the bracket which supports the both end sides of a shaft was provided, and the said 1st stopper and the 2nd stopper were formed in the bracket, and it aims at reduction of a number of parts and space saving. be able to.

First, the overall configuration of the sea track will be described with reference to FIGS. 2 is a front view of the seat track of the embodiment, FIG. 3 is a top view of FIG. 2, and FIG. 4 is a right side view of FIG.
In these drawings, the seat track 101 includes a lower rail 103 provided on the floor side, and an upper rail 105 provided on the seat side and movably engaged with the lower rail 103 in the direction of arrow B and arrow B ′. Yes.

  As shown in FIG. 4, the cross-sectional shape of the lower rail 103 of the seat track 101 is bent from one end portion of the base portion 103a and the base portion 103a provided substantially parallel to the floor, and extends in a direction away from the floor. The first side wall portion 103b that protrudes, the second side wall portion 103c that is bent from the other end portion of the base portion 103a and extends away from the floor, and the second side wall portion 103b that is bent from the upper end portion of the first side wall portion 103b The first upper surface portion 103d extending in the direction of the second side wall portion 103c and the upper end portion of the second side wall portion 103c are bent and extended in the direction of the first side wall portion 103b substantially parallel to the base portion 103a. A second upper surface portion 103e, a first drooping portion 103f that is bent from the other end of the first upper surface portion 103d toward the base portion 103a and is shorter than the first side wall portion 103b, and a second upper surface portion 103e. From the other end of the Part 103a bent in a direction, and face each other through the first hanging portion 103f and space, consists substantially a second hanging portion 103g of the same length as the first hanging portion 103f.

  The upper rail 105 provided on the seat side is bent from an upper surface portion 105a provided substantially parallel to the floor, one end portion of the upper surface portion 105a, and a first hanging portion 103f and a second hanging portion 103g of the lower rail 103, Between the first side wall portion 105b extending into the lower rail 103 through the space between the other end portion of the upper surface portion 105a and the first hanging portion 103f and the second hanging portion 103g of the lower rail 103. A second side wall portion 105c extending into the lower rail 103 through a space therebetween, and a first side wall portion 103b, a first upper surface portion 103d, and a first hanging portion of the lower rail 103 from the lower end portion of the first side wall portion 105b. 105f extending to the space formed by 103f, the second side wall portion 103c of the lower rail 103, the second upper surface portion 103e, and the second upper surface portion 103e from the lower end of the second side wall portion 105c. It consists a second pop-section 105e extending into the space formed by the hanging part 103 g.

  The first side wall portion 103b, the first upper surface portion 103d of the upper rail 105, the ball 107 that contacts the first jumping portion 105d of the lower rail 103, the second side wall portion 103c of the upper rail 105, the second upper surface portion 103e, and the second of the lower rail 103. A ball 109 abutting on the jumping portion 105e, a lower portion of the first jumping portion 105d of the upper rail 105, a ball 111 abutting on the base portion 103a of the lower rail 103, a lower portion of the second jumping portion 105e of the upper rail 105, and a base portion of the lower rail 103 The upper rail 105 is movably engaged with the lower rail 103 by a ball 113 that abuts on the 103a.

Next, the seat track locking mechanism 201 that prohibits the movement of the upper rail 105 will be described.
A plurality of lock holes 203 are formed in the first side wall portion 103b of the lower rail 103 along the moving direction (arrow B direction, arrow B ′ direction).

  On the other hand, a bracket 211 is provided on the upper surface portion 105 a of the upper rail 105. The bracket 211 is bent from the surface along the arrow B direction and the arrow B ′ direction of the base portion 211a and the base portion 211a attached to the upper surface portion 105a of the upper rail 105 along the arrow B direction and the arrow B ′ direction. The lower rail 211b, which faces the first upper surface 103d and the first side wall 103b of the lower rail 103 through the space, and the ends of the base 211a and the lower 211b in the direction of arrow B are folded away from the floor. The first bent portion 211c is bent, and the second bent portion 211d is bent in the direction away from the floor from the end of the hanging portion 211b in the arrow B ′ direction.

Four bracket holes 211f facing the lock hole 203 are formed in the hanging portion 211b of the bracket 211. In addition, four upper rail holes 105g facing the lock holes 203 are also formed in the first jump upper portion 105d of the upper rail 105. The first bent portion 211c and the second bent portion 211d of the bracket 211 have Opposing holes are formed, and the shaft 213 is inserted through these holes. Therefore, the shaft 213 is provided along the moving direction of the upper rail 105 (arrow B direction, arrow B ′ direction). Further, the portions protruding from the first bent portion 211 c and the second bent portion 211 d of the shaft 213 are crimped to prevent the bracket 211 from coming off.

  A first lock lever 221 and a second lock lever 231 having the same structure are provided on the shaft 213 so as to be rotatable with respect to the shaft 213 and to be movable along the shaft 213. On one end side of the first lock lever 221 and the second lock lever 231, there are two first lock teeth 223 that can be engaged and disengaged with the lock hole 203 of the lower rail 103, and two second lock teeth. 233 is formed. In this embodiment, when the first lock teeth 223 and the second lock teeth 233 are engaged with the lock holes 203, the lock holes 203 are inserted into the lock holes 203 through the bracket holes 211f so that the lock strength is increased. Further, it engages with the upper rail hole 105g.

  Further, a spring as a first urging means in which an intermediate portion is wound around the shaft 213, one end portion is locked to the base portion 211 a of the bracket 211, and the other end portion is locked to the first lock lever 221. The first lock lever 221 is urged by 225 in a direction (lock direction) in which the first lock teeth 223 engage with the lock hole 203. Similarly, the intermediate portion is wound around the shaft 213, one end portion is locked to the base portion 211 a of the bracket 211, and the other end portion is locked to the first lock lever 221 as second urging means. The second lever 231 is urged by the spring 235 in the direction (lock direction) in which the second lock teeth 233 engage with the lock hole 203 (in FIG. 4, the second lock lever 231 at the solid line position). reference).

  When the first lock teeth 223 of the first lock lever 221 and the second lock teeth 233 of the second lock lever 231 are engaged with the lock holes 203, the upper rail 105 of the seat track 101 with respect to the lower rail 103 is The locked state is prohibited from moving.

  A bracket 301 is provided adjacent to the bracket 211 on the upper surface portion 105 a of the upper rail 105. A lever 305 is rotatably provided on the bracket 301 using a shaft 303.

  On the other hand, on the other end side of the first lock lever 221 and the second lock lever 231, lever contact portions 227 and 237 with which one rotation end portion of the lever 305 can contact are formed. An operation handle 309 is attached to the other end side of the lever 305. Then, the lever 305 is connected to the first lock lever 221, the second by the spring 307 in which the intermediate portion is wound around the shaft 303, one end is locked to the bracket 301, and the other end is locked to the lever 305. The lock lever 231 is urged in a direction in which it abuts against lever abutting portions 227 and 237 formed on the other end side of the lock lever 231. Note that the force by which the lever 305 biased by the spring 307 pushes the lever contact portions 227 and 237 of the first lock lever 221 and the second lock lever 231 is the first force biased by the springs 225 and 235. The lock lever 221 and the second lock lever 232 are set to be smaller than the force with which the lock lever 203 is engaged. When the operation handle 309 is operated in the urging direction of the spring 307, the lever 305 pushes the lever contact portions 227 and 237 of the first lock lever 221 and the second lock lever 231, and the first lock lever 221. The first lock teeth 223 and the second teeth 233 of the second lock lever 231 are separated from the lock holes 203.

  Then, when the first lock teeth 223 of the first lock lever 221 and the second lock teeth 233 of the second lock lever 231 are disengaged from the lock hole 203, the movement of the upper rail 105 relative to the lower rail 103 of the seat track 101 is moved. Is allowed and unlocked.

  Next, the 1st lock tooth 223 and the 2nd lock tooth 233 are demonstrated using FIG. 1A is a cross-sectional view taken along a cutting line CC in FIG. 2, and FIG. 1B is an enlarged view of a portion D in FIG.

  When the first lock tooth 223 engages with the lock hole 203 on the side wall surface on the other side (arrow B ′ direction) of the first lock tooth 223 ′ of one of the two first lock teeth 223. The first tapered surface 223a ′ is formed so as to generate a component force that abuts against the other side wall surface of the lock hole 203 and moves the first lock lever 221 in one direction (arrow B direction). Yes.

  Similarly, the second lock tooth 233 is engaged with the lock hole 203 on the side wall surface of one of the second lock teeth 233 ′ (in the direction of arrow B) of the two second lock teeth 233. The second tapered surface 233a ′ that generates a component force that contacts the one side wall surface of the lock hole 203 and moves the second lock lever 231 in the other direction (arrow B ′ direction) is combined. Is formed.

According to such a configuration, the following effects can be obtained.
(1) The first lock teeth 223 are formed in the lock holes 203 on the side wall surface of the other one (arrow B ′ direction) of the first lock teeth 223 ′ of the two first lock teeth 223. When engaged, there is a first tapered surface 223a ′ that generates a component force that abuts against the other side wall surface of the lock hole 203 and moves the first lock lever 221 in one direction (arrow B direction). Is formed.

  Similarly, the second lock tooth 233 is engaged with the lock hole 203 on the side wall surface of one of the second lock teeth 233 ′ (in the direction of arrow B) of the two second lock teeth 233. The second tapered surface 233a ′ that generates a component force that contacts the one side wall surface of the lock hole 203 and moves the second lock lever 231 in the other direction (arrow B ′ direction) is combined. Is formed.

Therefore, in the locked state, the first tapered surface 223a ′ of the first lock tooth 223 ′ of the first lock lever 221 abuts on the other side wall surface of the lock hole 203, and the first lock lever 221 is in contact. Moves in one direction (arrow B direction). Due to the movement of the first lever 221 in one direction, at least one or more of the following two (1)-(2) contacts occurs.
(1) One side wall surface of the first lock tooth 223 ′ abuts on the other side wall surface of the bracket hole 211f of the bracket 211 (see FIG. 1A).
(2) The first lock lever 221 contacts the first bent portion 211 c of the bracket 211.

Therefore, the bracket 211 having the bracket hole 211f and the first bent portion 211c functions as a first stopper.
In the locked state, the second taper surface 233a ′ of the second lock tooth 233 ′ of the second lock lever 223 abuts on one side wall surface of the lock hole 203, and the second lock lever 223 Moves in the other direction (arrow B ′ direction). Due to the movement of the second lever 231 in the other direction, at least one or more of the following two contact points (1) to (2) occurs.
(1) The other side wall surface of the second lock tooth 223 ′ comes into contact with one side wall surface of the bracket 211 bracket hole 211f (see FIG. 1A).
(2) The second lock lever 221 contacts the second bent portion 211d of the bracket 211.

Therefore, the bracket 211 having the bracket hole 211f and the second bent portion 211d also functions as a second stopper.
The first taper surface 223a ′ of the other side wall surface of the first lock teeth 223 ′ of the first lock lever 221 (in the direction of arrow B ′) is on one side (in the direction of arrow B) of the lock hole 203. The one side wall surface is in contact with the first stopper of the bracket 211, and one of the second lock teeth 233 ′ of the second lock lever 221 (in the direction of arrow B). The second tapered surface 233a ′ of the side wall surface is in contact with the other side wall surface (in the direction of arrow B ′) of the lock hole 203, and the other side wall surface is in contact with the second stopper of the bracket 211. Thus, in the locked state, the play between the first lock lever 221, the second lock lever 231 and the lower rail 103 in which the lock hole 203 is formed, the first lock lever 221, the second lock lever 231. And the bracket 211 backlash and eliminating the upper rail 105 provided.
(2) A bracket 211 that supports both ends of the shaft 213 is provided, and the bracket 211 has a bracket hole 211 that functions as a first stopper, and a first bent portion 211c that functions as a second stopper. By forming the second bent portion 211d, it is possible to reduce the number of parts and save space.

  The present invention is not limited to the above embodiment. In the above embodiment, the bracket hole 211 and the first bent portion 211c are used as the first stopper, but either one may be used. Similarly, the bracket hole 211 and the second bent portion 211d are used as the second stopper, but either one may be used.

(A) The figure is sectional drawing in CC of FIG. 2, (b) A figure is an enlarged view of D section of (a) figure. It is a front view of the seat track of an example. FIG. 3 is a top view of FIG. 2. FIG. 3 is a right side view of FIG. 2. It is a figure explaining the locking mechanism of the conventional seat track. It is an enlarged view of the lock tooth of FIG.

Explanation of symbols

221 1st lock lever 223 '1st lock tooth 223a' 1st taper surface 231 2nd lock lever 233 '2nd lock tooth 233a' 2nd taper surface

Claims (2)

Lower rail provided on the floor side,
In the seat track locking mechanism for prohibiting the movement of the upper rail of the seat track, which is provided on the seat side and is configured to be movably engaged with the lower rail,
A plurality of lock holes formed along the moving direction in one of the lower rail and the upper rail; and
A shaft provided on the other rail of the lower rail and the upper rail along the moving direction of the upper rail;
A first lock lever provided movably in at least one direction along the shaft and formed with first lock teeth detachable from the lock hole;
First biasing means for biasing the first lock lever in a direction in which the first lock teeth engage with the lock hole;
The first lock lever is provided on a rail provided with the shaft, and the first lock lever can come into contact with the first lock lever. When the first lock lever comes into contact with the first lock lever, further movement in one direction along the shaft is prohibited. 1 stopper,
A second lock lever provided so as to be movable in at least the other direction along the shaft, and formed with second lock teeth capable of being engaged with and disengaged from the lock hole;
Second urging means for urging the second lock lever in a direction in which the second lock teeth engage with the lock hole;
A second lock lever is provided on the rail provided with the shaft, and the second lock lever can come into contact with the second lock lever. When the contact is made, the second lock lever is prohibited from moving in the other direction along the shaft. The stopper of
Have
When the first lock tooth engages the lock hole on the other side wall surface of the first lock tooth, the first lock lever comes into contact with the other side wall surface of the lock hole. A first tapered surface is formed so as to generate a component force that moves in one direction;
When the second lock tooth engages with the lock hole on one side wall surface of the second lock tooth, the second lock lever comes into contact with one side wall surface of the lock hole. A seat track locking mechanism characterized in that a second tapered surface is formed so as to generate a component force to be moved in the other direction. Provide brackets to support both ends of the shaft,
2. The seat track locking mechanism according to claim 1, wherein the bracket is formed with the first stopper and the second stopper.

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