JP2004249875A - Seat track - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat track allowing a reduction in the number of parts, cost, and weight, and capable of preventing abnormal noise from occurring. <P>SOLUTION: A lock means prohibiting the movement of an upper rail 201 disposed in a first through hole 251 formed in one side face of the upper rail 201, a second through hole 253 formed in one side face of the upper rail 201 on the lower side of the first through hole 251, a plurality of lock holes 151 formed in a lower rail 101 along the longitudinal direction thereof and opposed to the second through hole 253, and the upper rail 201. One end part thereof is inserted into the first through hole 251 and swingably supported on the first through hole 251. The other end part thereof comprises a lock lever in which lock teeth 317 engageable/disengageable from the lock hole 151 through the second through hole 253, and a plate spring (energizing means) 305 energizing the lock lever 311 in such a direction that the lock teeth 317 of the lock lever 311 are engaged with the lock hole 151. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seat truck having a lower rail provided on a floor side, an upper rail provided on a seat side and movably engaged with the lower rail, and a lock means for inhibiting movement of the upper rail.
[0002]
[Prior art]
As shown in FIG. 5, a passenger car or the like may be provided with a set (outer side, inner side) of the seat track 1 for adjusting the front / rear position of the seat. In general, the seat track 1 is provided with a lower rail 3 provided on the floor side, an upper rail 7 provided on the seat (seat cushion) 5 side and movably engaged with the lower rail 3, and a locking means for inhibiting movement of the upper rail 7. And
[0003]
As a configuration of the locking means, there is a configuration shown in FIGS. In the drawing, a plurality of lock holes 9 are formed in the lower rail 3 along the longitudinal direction. On the other hand, a bracket 11 is provided on the upper rail 7. The bracket 11 rotatably supports a substantially U-shaped operation bar 13. Further, a lock lever 17 having a lock tooth 15 which can be engaged with and disengaged from the lock hole 9 of the lower rail 3 is fixed to the operation bar 13. The lock teeth 15 of the lock lever 17 are engaged with the lock holes 9 of the lower rail 3 by a spring 21 having one end locked to the operation bar 13 and the other end locked to the bracket 11. The operation bar 13 is urged in a direction in which the operation bar 13 is moved (for example, see Patent Document 1).
[0004]
Next, the operation of the above configuration will be described. Due to the urging force of the spring 21, the lock teeth 15 of the lock lever 17 are engaged with the lock holes 9 of the lower rail 3, and the movement of the upper rail 7 is prohibited. Here, when the operation bar 13 is rotated against the urging force of the spring 21, the lock teeth 15 of the lock lever 17 are disengaged from the lock holes 9 of the lower rail 3, and the upper rail 7 (seat 5) moves with respect to the lower rail 3. It can be moved. When the operating force on the operation bar 13 is released by moving to the desired position, the lock teeth 15 of the lock lever 17 are re-engaged with the lock holes 9 of the lower rail 3 by the urging force of the spring 21, and the movement of the upper rail 7 is stopped. It is forbidden.
[0005]
[Patent Document 1]
JP-A-5-286383 (pages 2 and 3, FIGS. 1 and 5)
[0006]
[Problems to be solved by the invention]
However, the seat truck having the above configuration has the following problems.
(1) The rotating shaft of the lock lever 17 (in FIGS. 6 and 7, the operating lever 13 also serves) and the bracket 11 that supports the rotating shaft are required, and the number of parts is large. Therefore, cost and weight increase.
(2) The operation bar 13 rotatably supported by the bracket 11 is prohibited from moving in the axial direction when the side surface 17 a of the lock lever 17 abuts on the bracket 11. However, a clearance is required between the lock lever 17 and the bracket 11 in order to ensure smooth rotation of the lock lever 17, and play occurs in the axial direction.
[0007]
Also, between the lock teeth 15 of the lock lever 17 in the engaged state and the lock holes 9 of the lower rail 3, rattling occurs in the axial direction of the operation bar 13 for the same reason. Therefore, when vibration is applied to the locking means during traveling of the vehicle or the like, the lock lever may move in the axial direction of the operation bar 13 and collide with the bracket 11 or the lock hole 9 to generate abnormal noise.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first object of the present invention is to provide a seat truck capable of reducing the number of parts, reducing cost and weight.
A second object is to provide a seat track free of abnormal noise.
[0009]
[Means for Solving the Problems]
The invention according to claim 1, which solves the above-mentioned problems, comprises a lower rail provided on the floor side, an upper rail provided on the seat side and movably engaged with the lower rail, and a lock means for inhibiting movement of the upper rail. In the seat track having: a locking means, a first through hole formed in one side surface of the upper rail, a plurality of locking holes formed in the lower rail along a longitudinal direction thereof, one end side is A lock lever that is inserted into the first through-hole, is swingably supported by the first through-hole, and has a lock tooth formed on the other end side that can be engaged with and disengaged from the lock hole; A seat track, comprising: urging means for urging the lock lever in a direction in which a lock tooth of the lever is engaged with the lock hole.
[0010]
One end of the lock lever is inserted into the first through hole, and is swingably supported by the first through hole, thereby supporting the lock lever (corresponding to a shaft and a bracket in a conventional example). Is unnecessary, the number of parts can be reduced, and the cost and weight can be reduced.
[0011]
The invention according to claim 2 is the seat track according to claim 1, wherein the lock lever is disposed in the upper rail. In general, grease is applied to the lock teeth and the lock holes of the lock lever so that the lock teeth of the lock lever can be smoothly engaged and disengaged from the lock holes. By being disposed in the lock lever upper rail, grease does not adhere to the feet of the occupant and does not become dirty.
[0012]
According to a third aspect of the present invention, there is provided a seat track having a lower rail provided on a floor side, an upper rail provided on a seat side and movably engaged with the lower rail, and a lock means for inhibiting movement of the upper rail. A first through hole formed on one side surface of the upper rail, a second through hole formed on one side surface of the upper rail, and formed below the first through hole; A plurality of lock rails are formed in the lower rail along the longitudinal direction thereof, the lock holes are opposed to the second through holes, and the lock holes are disposed in the upper rail. One end of the lock holes is inserted into the first through holes, and A lock lever that is swingably supported by the through hole and has, on the other end side, a lock lever formed with a lock tooth that can be engaged with and disengaged from the lock hole through the second through hole; A seat track, characterized in that over the locking teeth is in a biasing means for biasing said lock lever in a direction to engage the locking hole.
[0013]
A lock lever is disposed in the upper rail, and one end of the lock lever is inserted into the first through-hole and is swingably supported by the first through-hole, thereby supporting the lock lever ( In the conventional example, the shaft and the bracket are unnecessary), the number of parts can be reduced, and the cost and weight can be reduced.
[0014]
According to a fourth aspect of the present invention, the urging means urges the lock teeth of the lock lever in a direction engaging with the lock hole, and reverses a direction in which the lock lever comes out of the first through hole. The seat track according to any one of claims 1 to 3, wherein the seat track is biased in a direction. The urging means urges the lock lever in a direction opposite to a direction in which the lock lever comes out of the first through hole, so that a lock lever retaining means is not required.
[0015]
The seat track according to any one of claims 1 to 3, wherein the other end of the lock lever is formed so that the width thereof is gradually reduced toward the tip. It is. The other end of the lock lever is formed so that the width gradually decreases toward the tip, so that when the lock lever is urged by the urging means, the other end of the lock lever and the lower rail are connected. There is no backlash with the first through hole. Therefore, even when vibration is applied to the locking means during traveling of the vehicle or the like, generation of abnormal noise due to backlash of the lock lever is eliminated.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view of a seat track according to an embodiment of the present invention, showing a locked state of a lock means, FIG. 2 is a view showing an unlocked state of FIG. 1, and FIG. 3 is an upper rail and a lock lever of FIG. FIG. In FIG. 1, a lower rail 101 provided on the floor side includes a base portion 103, a side wall portion 105, a side wall portion 107, which is bent substantially 90 ° from both ends of the base portion 103 and extends away from the floor. Top portions 109 and 111 that are bent approximately 90 ° from the end of the side wall portion 107 and approach each other, and bent approximately 90 ° from the top end of the top portion 109 and the top portion 111 and extend toward the floor. It consists of a hanging part 113 and a hanging part 115. An upper rail 201 provided on the seat side and movably engaged with the lower rail 101 is provided with a ceiling portion 203 facing the seat, and approximately 90 ° bent from both ends of the ceiling portion 203 to extend in the floor direction. 113, a side wall portion 205 extending to the inside of the lower rail 101 through the space between the hanging portions 115, a side wall portion 207, and a side wall portion 205, which is bent in a substantially U shape from the tip of the side wall portion 207, The side wall portion 207 includes a hanging portion 113 of the lower rail 101, a bent portion 209 sandwiching the hanging portion 115, and a bent portion 211.
[0017]
Further, in the space formed by the base 103, the side wall 105, the top 109, and the bent portion 209 of the upper rail 201, the lower rail 101 abuts on the upper rail 201, and the upper rail 201 is in contact with the lower rail 101. A slide piece 301 made of a low-friction material such as a resin is provided so as to move smoothly. Similarly, the space formed by the base portion 103, the side wall portion 107, the top portion 111, and the bent portion 211 of the upper rail 201 abuts on the lower rail 101 and the upper rail 201, and the upper rail 201 is in contact with the lower rail 101. A slide piece 301 made of a low-friction material such as a resin is provided so as to move smoothly.
[0018]
Next, the locking means will be described with reference to FIGS. A first through hole 251 is formed in an upper portion of the side wall portion 205 which is one side surface of the upper rail 201. Further, below the first through hole 251, a second through hole 253 is formed. Further, a third through hole 255 facing the second through hole 253 is formed in the bent portion 209 of the upper rail 201. On the other hand, as shown in FIG. 1, a lock hole 151 facing the second through hole 253 is formed in the hanging part 113 of the lower rail 101. On the inner wall side of the side wall portion 207, which is the other side surface of the upper rail 201, a portion facing the first through hole 251 and the second through hole 253 is a cantilevered leaf spring as shown in FIG. 305 is attached. A lock lever 311 having a substantially U-shaped cross section is disposed in a space surrounded by the top 203, the side wall 205, and the side wall 207 of the upper rail 201. The lock lever 311 includes an intermediate portion 313 facing the leaf spring 305, an upper portion (one end side) 315 bent from the upper side of the intermediate portion 313 and inserted into the first through hole 251 of the upper rail 201. The lower portion 319 is bent from the lower side of the portion 313 and has a lock tooth 317 that can be engaged with and disengaged from the lock hole 151 of the lower rail 101 via the second through hole 253 of the upper rail 201. When the upper part 315 of the lock lever 311 is inserted into the first through hole 251 of the upper rail 201, the lock lever 311 is swingably supported by the first through hole 251.
[0019]
As shown in FIG. 1, the leaf spring 305 pushes the back of the intermediate portion 313 of the lock lever 311, and the lock lever 311 is urged in the direction in which the lock teeth 317 engage with the lock holes 151 of the lower rail 101. I have. In the present embodiment, the lock teeth 317 of the lock lever 311 are engaged with the lock hole 151 of the lower rail 101 and the third through hole 255 of the upper rail 201 by being urged by the plate spring 305. Has become. Further, in the present embodiment, the leaf spring 305 pushes the back of the lock lever 311 to urge the lock lever 311 in the direction opposite to the direction in which the lock lever 311 comes out of the first through hole 251 (the direction of arrow II), and the lock lever 311 It also functions as a means for preventing the 311 from falling out of the first through hole 251. Further, in the present embodiment, the shape of the upper portion 315 of the lock lever 311 is formed such that the width gradually decreases toward the tip.
[0020]
Next, the operation of the above configuration will be described. 1 is a lock state in which the lock teeth 317 of the lock lever 311 are engaged with the lock holes 151 of the lower rail 101 by the urging force of the leaf spring 305, and the movement of the upper rail 201 is prohibited. Here, when the upper part 315 of the lock lever 311 is pressed downward in the direction of arrow I against the urging force of the leaf spring 305, the leaf spring 305 is elastically deformed, and the lock lever 311 rotates around the first through hole 251 as a fulcrum. Then, the lock teeth 317 are disengaged from the lock holes 151 of the lower rail 101, and the unlocked state shown in FIG.
[0021]
Then, after the upper rail 201 is moved to the desired seat position, when the force for pushing the upper portion 315 of the lock lever 311 downward is released, the lock teeth 311 of the lock lever 311 It engages with a lock hole 151 different from the previous one and returns to the locked state shown in FIG.
[0022]
According to the above configuration, the following effects can be obtained.
(1) The lock lever 311 is disposed in the upper rail 201, and the upper end 315, which is one end side, is inserted into the first through hole 251 and is swingably supported by the first through hole 251. Further, a member (corresponding to a shaft and a bracket in the conventional example) for supporting the lock lever 311 is not required, so that the number of parts can be reduced, and the cost and weight can be reduced.
(2) The upper end 315, which is the other end of the lock lever 311, is formed so that the width gradually decreases toward the tip, so that when the lock lever 311 is urged by the leaf spring 305, the lock lever 311 The play between the upper portion 315 of the lower rail 311 and the first through hole 251 of the lower rail 101 is eliminated. Therefore, even when vibration is applied to the lock means during traveling of the vehicle or the like, generation of noise due to play of the lock lever 311 is eliminated.
(3) Generally, grease is applied to the lock teeth 317 and the lock holes 151 of the lock lever 311 so that the lock teeth 317 of the lock lever 311 are smoothly engaged with and disengaged from the lock holes 151. Since the lock lever 311 is disposed in the upper rail 201, grease does not adhere to the feet of the occupant and does not become dirty.
(4) By pressing the back of the lock lever 311, the leaf spring 305 urges the lock lever 311 in the direction opposite to the direction in which the lock lever 311 comes out of the first through hole 251 (the direction of arrow II), and the first through hole of the lock lever 311. By also functioning as a retaining means for the lock lever 311, it is not necessary to separately provide a retaining means for the lock lever 311, and cost and weight can be reduced.
[0023]
Note that the present invention is not limited to the above embodiment. It goes without saying that the cross-sectional shapes of the lower rail and the upper rail are not limited to the shapes of the embodiment. For example, the second through-hole 253 and the third through-hole 255 of the upper rail 201 of the present embodiment are provided for increasing the lock strength. However, if the lock strength is sufficient, interference with the lock lever 311 is prevented. It may be a notch.
[0024]
Furthermore, in the above embodiment, the lock lever 311 is arranged inside the upper rail 201, but may be arranged outside the upper rail as shown in FIG. In the drawing, an upper rail 510 provided on the seat side is movably engaged with a lower rail 500 provided on the floor side. A first through-hole 513 is formed in the upper rail 510, and a plurality of lock holes 501 are formed in the lower rail 500. Outside the upper rail 510, one end is inserted into the first through hole 513 and is swingably supported by the first through hole 513, and the other end is locked with the lower rail 500. A lock lever 523 having a lock tooth 521 that can be engaged with and disengaged from the hole 501 is provided. The upper rail 510 pushes the lock lever 523 to urge the lock teeth 521 in the direction in which the lock teeth 521 are engaged with the lower rail 500 lock holes 501, and also applies the lock lever 523 in the direction opposite to the direction in which the lock lever 523 comes out of the first through holes 513. A biasing leaf spring 531 is provided.
[0025]
Also, depending on the urging means, there may be a case where the lock lever cannot be urged in the direction opposite to the direction in which the lock lever comes out of the first through hole. In this case, a lock lever retaining means may be provided.
[0026]
【The invention's effect】
As described above, according to the first aspect of the present invention, one end of the lock lever is inserted into the first through-hole and is swingably supported by the first through-hole. A supporting member (corresponding to a shaft and a bracket in the conventional example) becomes unnecessary, so that the number of parts can be reduced, and cost and weight can be reduced.
[0027]
In general, grease is applied to the lock teeth and the lock holes of the lock lever so that the lock teeth of the lock lever can be smoothly engaged and disengaged from the lock holes. According to the second aspect of the present invention, since the grease is arranged in the lock lever upper rail, grease does not adhere to the feet of the occupant and does not become dirty.
[0028]
According to the third aspect of the present invention, the lock lever is disposed in the upper rail, and one end of the lock lever is inserted into the first through hole, and is swingably supported by the first through hole. This eliminates the need for a member (corresponding to a shaft and a bracket in the conventional example) for supporting the lock lever, thereby reducing the number of components, and reducing costs and weight.
[0029]
According to the fourth aspect of the present invention, the urging means urges the lock lever in a direction opposite to a direction in which the lock lever comes out of the first through-hole, so that a lock lever retaining means is not required.
[0030]
According to the invention as set forth in claim 5, the other end of the lock lever is formed so that the width gradually decreases toward the tip, so that when the lock lever is urged by the urging means, the lock lever is locked. There is no play between the other end of the lever and the first through hole of the lower rail. Therefore, even when vibration is applied to the locking means during traveling of the vehicle or the like, generation of abnormal noise due to backlash of the lock lever is eliminated.
[Brief description of the drawings]
FIG. 1 is a sectional view of a seat track according to an embodiment of the present invention, showing a locked state.
FIG. 2 is a view showing an unlocked state of FIG. 1;
FIG. 3 is a perspective view of an upper rail and a lock lever of FIG. 1;
FIG. 4 is a diagram illustrating another embodiment.
FIG. 5 is a diagram illustrating a seat track.
FIG. 6 is a diagram illustrating a conventional seat track locking means.
FIG. 7 is a sectional view taken along section line AA in FIG. 6;
[Explanation of symbols]
101 lower rail 151 lock hole 201 upper rail 251 first through hole 253 second through hole 255 third through hole 305 leaf spring (biasing means)
311 Lock lever 317 Lock tooth

Claims (5)

In a seat track having a lower rail provided on the floor side, an upper rail provided on the seat side and movably engaged with the lower rail, and a lock means for inhibiting movement of the upper rail,
The lock means,
A first through hole formed on one side surface of the upper rail,
Lock holes formed in the lower rail along the longitudinal direction thereof,
One end side is inserted into the first through-hole, and is swingably supported by the first through-hole, and the other end side has a lock tooth that can be engaged with and disengaged from the lock hole. Lock lever,
Urging means for urging the lock lever in a direction in which the lock teeth of the lock lever engage with the lock hole;
A seat track characterized by being composed of: The lock lever is
The seat track according to claim 1, wherein the seat track is disposed in the upper rail. In a seat track having a lower rail provided on the floor side, an upper rail provided on the seat side and movably engaged with the lower rail, and a lock means for inhibiting movement of the upper rail,
The lock means,
A first through hole formed on one side surface of the upper rail,
A second through hole formed on one side surface of the upper rail and formed below the first through hole;
A plurality of lock holes formed in the lower rail along the longitudinal direction thereof and facing the second through hole;
The first through hole is disposed in the upper rail, one end of the second through hole is inserted into the first through hole, and is swingably supported by the first through hole. A lock lever formed with lock teeth that can be engaged with and disengaged from the lock hole through the lock lever;
Urging means for urging the lock lever in a direction in which the lock teeth of the lock lever engage with the lock hole;
A seat track characterized by being composed of: The urging means,
The lock teeth of the lock lever are urged in a direction to engage with the lock hole, and the lock lever is urged in a direction opposite to a direction in which the lock lever comes out of the first through hole. 3. The seat truck according to any one of 3. The seat track according to any one of claims 1 to 3, wherein a width of the other end of the lock lever is gradually reduced toward a tip end.

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