JPH0431142Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a seat truck used in automobiles, etc., and more specifically, to easily return the seat to the seat position before the walk-in when the person walks in. Regarding the seat track that can be used.

(Prior Art) There is a seat track shown in FIGS. 3 and 4 that returns the seat to the position before the walk-in after the walk-in. In these figures, 1 is a lower rail fixedly installed on the floor side,
2 is an upper rail that is slidably fitted to the lower rail 1. Lock plate 3 on lower rail 1
is fixed thereto, and lock holes 3b are bored at a predetermined pitch in the side portion 3a of the lock plate.
A lock lever bracket 4 having a handle portion 4a is rotatably attached to the upper rail 2 using a pin 5. A compression spring 6 is engaged with the upper rail 2 and the lock lever bracket 4. On the lock lever bracket 4, on the side opposite to the handle part 4a with the pin 5 in between, there is a lock gear part 7b having lock teeth 7a that can be engaged with the lock hole 3b, and a lock groove 7c connected to the lock gear part 7b. A memory board 7 consisting of a memory board section 7d provided with a memory board 7 is rotatably provided using a pin 8. The compression spring 6 mentioned above causes the lock lever bracket 4 to have the lock teeth 7a in the lock hole 3.
is biased to rotate in the direction of engagement. A walk-in lever 9 having an engaging protrusion 9a that engages with the lock groove 7c of the memory board 7 and prohibits rotation of the memory board 7 is rotatably attached to the lock lever bracket 4 using a pin 10. ing. Furthermore, the walk-in lever 9 is biased to rotate in the direction in which the engagement protrusion 9a engages with the lock groove 7c of the memory board 7 by a tension spring 11 that is engaged with the walk-in lever 9 and the lock lever bracket 4. has been done. Therefore, the lower rail 1 and the upper rail 2 are the memory board 7 on the upper rail 2 side whose rotation is prohibited by the walk-in lever 9.
The lock tooth 7a is the lock hole 3 of the lock plate 3.
By meshing with b, the sliding movement (seat slide) of the upper rail 2 is locked. Further, a hole 9b is bored at one end of the walk-in lever 9, and the hole 9b is connected to a walk-in cable (not shown). 9 is rotated counterclockwise in FIG. 3, and the engagement between the engagement protrusion 9a and the lock groove 7c of the memory board 7 is released.

Next, the operation of the above configuration will be explained.

First, when performing a seat slide in the locked state shown in FIG. 3, the handle portion 4a of the lock lever bracket 4 is rotated counterclockwise in FIG. When this is done, the engagement between the lock teeth 7a of the lock gear portion 7b of the memory board 7 and the lock hole 3b of the lock plate 3 is released, and the upper rail 2 becomes able to slide with respect to the lower rail 1. After performing the desired seat slide, the handle portion 4
When the force for rotating the lock lever a counterclockwise is released, the lock lever bracket 4 rotates clockwise, and the lock tooth 7a and the lock hole 3 are re-engaged, resulting in a locked state.

Next, a case will be described in which a walk-in is performed in FIG. 3, which is in a locked state. During walk-in, the walk-in lever 9 rotates counterclockwise and engages the engagement protrusion 9a and the lock groove 7 of the memory board 7.
The engagement with c is released, and the memory board 7 becomes rotatable. Then, with the lock teeth 7a meshing with the lock holes 3b of the lock plate 3, the memory board 7
While rotating, the upper rail 2 moves to the walk-in position.

Next, when the walk-in is released, the walk-in lever 9 rotates clockwise, and the engagement protrusion 9a
comes into contact with the circumferential surface of the memory board portion 7d of the memory board 7. Then, when the upper rail 2 is moved in the direction of the pre-walk-in position, the memory board 7 rotates with the engaging protrusion 9a in contact with the circumferential surface, and the upper rail 2 comes to the pre-walk-in position. Then, the engaging protrusion 9a engages with the groove 7c and becomes locked again, completing the return to the position before the walk-in.

According to the above configuration, the seat slide can be performed by operating the handle portion 4a of the lock lever bracket 4, and after the walk-in, the engagement protrusion 9a of the walk-in lever 9 moves into the groove 7c of the memory board 7. By moving the upper rail 2 until it engages with the seat, the seat can be returned to the position before the walk-in.

(Problems to be Solved by the Invention) In the seat track configured as described above, the lower rail 1 and the upper rail 2 are locked through a memory board 7 whose rotation is prohibited by a walk-in lever 9. Therefore, the lock load passes through many parts, which increases the weight.
The problem is that there are many moving parts and the backlash performance is poor. As the stroke of the seat slide has recently become longer, there is a problem in that the diameter of the memory portion 7d of the memory board 7 has become larger. Furthermore, if the handle part 4a is operated during a walk-in, the memory board 7 rotates on its own, resulting in an incorrect memory.After the walk-in, the seat must be moved to the incorrect memory position in order to reset it to the optimal position. After obtaining the locked state, operate the handle part 4a again,
There was a problem where I had to do a seat slide. Further, since the handle portion 4a is of a swing type that rotates horizontally, there is also the problem that a large amount of space is required under the seat cushion. Furthermore, since the lock hole 3b drilled in the upper rail 2 is used as a lock, there is a problem in that the mesh is poor and an abnormal rattling noise is generated during walk-in.

This invention was devised in view of the above problems, and its purpose is to avoid sacrificing weight and backlash performance.
The diameter of the memory board is small, so even if you operate the control handle during walk-in, the memory will be cleared, and you can reset the seat to the optimal position without having to go through complicated procedures. To provide a seat track that does not sometimes generate abnormal noise.

(Means for Solving the Problems) The present invention for solving the above problems includes a lower rail fixedly installed on the floor side, an upper rail slidably fitted to the lower rail, and provided on the lower rail side, a lock plate with lock teeth engraved thereon; a memory rack provided on the lower rail side with a rack engraved thereon; a pipe rotatably attached to the upper rail; A handle shaft inserted through the handle shaft, a lock lever that is fixed to the pipe and whose engagement with the lock plate is released at the time of walk-in, and a rotating biasing of the pipe in the direction of engagement between the lock lever and the lock plate. a lift lever that is fixed to the handle shaft and rotates together with the lock lever when the seat slide is unlocked; a gear arm pivotally supported on each lever; a reduction gear rotatably attached to the gear arm and capable of meshing with the memory rack; and a reduction gear rotatable to the gear arm such that the reduction gear and the gear portion mesh with each other. a memory disk that is attached to the handle shaft and has an engaging portion that engages with the lock lever; a second spring that applies a rotation biasing force in a direction that causes the memory disk to engage with the lock lever; The present invention is characterized in that the reduction gear includes a third spring that biases the reduction gear to rotate in a direction in which it engages with the memory rack.

(Function) In the seat track of the present invention, when the handshaft rotates, the lift lever and lock lever rotate, the engagement between the lock lever and the lock plate is released, and the engagement between the memory rack and the reduction gear is released. Then, the upper rail can slide against the lower rail.

Further, at the time of walk-in, only the lock lever rotates, the engagement between the lock lever and the memory disk is released, and the memory disk rotates and moves to the walk-in position.

(Example) Next, an example of the present invention will be described using FIGS. 1 and 2.

In FIG. 1 showing the main lock side of the seat track with both side locks, 21 is a lower rail fixed to the floor, and 22 is an upper rail that is slidably fitted to the lower rail 21. lower rail 2
A lock plate 23 having lock teeth 23a carved therein and a memory rack 24 having a rack 24a carved therein are provided on the base wall portion 21a of the memory card 1. A support portion 25a is provided on the base wall portion 22a of the upper rail 22.
and 25b, and a second bracket 26 having a support portion 26a are fixed to each other, and a pipe 27 is rotatably supported by the support portion 25a of the first bracket 25. A handle shaft 28 having an operating handle 28a at the end thereof is rotatably inserted into the pipe 27, and is further supported by a support portion 25b of the first bracket 25 and a second bracket 26. A lock lever 29 is fixed to the pipe 27. The lock lever 29 has a lock plate 23.
A lock hole 29a that can be engaged with a lock tooth 23a of
It has a bending protrusion 29b that can be engaged with a groove 37b of a memory board 37, which will be described later, and a wire hook 29c to which a walk-in wire (not shown) is locked. And when walking in, Lock lever 2
9 rotates to lock the lock tooth 2 of the lock plate 23.
3a and the lock hole 29a of the lock lever 29 are disengaged from each other. A hook protrusion 27a for a connecting wire to a sub-block (not shown) is protruded from the end of the pipe 27 on the side of the operating handle 28a. A first spring, in this embodiment, a torsion coil spring 30 around which the pipe 27 is wound and whose one end 30a is locked to the hook protrusion 27a and the other end 30b is locked to the base end 22a of the upper rail 22, is lock lever 29
The lock hole 29a of the lock plate 23 is biased to rotate in the direction in which the lock tooth 23a of the lock plate 23 engages with the lock hole 29a of the lock plate 23. A lift lever 31 is attached to the handle shaft 28.
is fixed. The lift lever 31 has a lock lever abutting protrusion 31a that can come into contact with the lift lever abutting protrusion 29d of the lock lever 29. When the operating handle portion 28a is operated, the lift lever 31 rotates, and the lock lever abutting protrusion 31a of the lift lever 31 engages the lock lever 29.
The lock lever 29 comes into contact with the lift lever contact protrusion 29d, and the lock lever 29 also rotates together with the lift lever contact projection 29d. The upper rail 22 is further provided with a gear arm bracket 32. And gear arm 33
One end 33a is pivoted to the gear arm bracket 32 using a pin 34, and the other end 33b is pivoted to the lift lever 31 using a pin 35. Note that the lift lever 31 has an elongated hole (not shown) in the vertical direction, and a pin 35 is inserted through the elongated hole. Therefore, when the lift lever 31 rotates, the other end 33b of the gear arm 33 horizontally rotates about the pin 34 on the one end 33a side. The gear arm 33 has a memory rack 24.
A reduction gear that can mesh with the rack 24a, in this embodiment, a first reduction gear 36a that meshes with the rack 24a, and a second reduction gear that is provided integrally with the first reduction gear 36a and has fewer teeth than the first reduction gear 36a. A reduction gear 36 made of resin and consisting of a gear 36b is rotatably attached. Further, the gear arm 33 has a gear portion 37a meshing with the second reduction gear 36b.
A memory board 37 made of resin is rotatably attached. The memory board 37 is provided with an engaging portion, in this embodiment, a groove 37b that can be engaged with the bending protrusion 29b of the lock plate 29, and when the bending protrusion 29b and the groove 37b of the memory board 37 engage, the memory Rotation of the board 37 is prohibited. A second spring, a torsion coil spring 38 in this embodiment, is disposed between the gear plate 33 and the memory board 37. As shown in FIG. 2, this torsion coil spring 38 has a starting end 38a and a terminal end 38b bent and in contact with the gear arm 33. The memory board 37 has a starting end 38a and a terminal end 38 in a state where the bending protrusion 29b can engage with the groove 37b.
For example, in FIG. 2, a bent protrusion 29b
The engagement with the groove 37b is released, and the memory board 37
When the protrusion 37c rotates clockwise, which is the walk-in direction, the protrusion 37c comes into contact with the terminal end 38b. Furthermore, when the protrusion 37c is rotated, since the starting end 38a is in contact with the gear arm 33, only the terminal end 38b is rotated clockwise. When the rotational force is released, the protrusion 37 is pressed against the terminal end 38b by the counterclockwise rotation biasing force of the torsion spring 38, rotates counterclockwise, and returns to its original position. do. The same thing will happen if the memory disk 37 is accidentally rotated in the counterclockwise direction, which is the anti-walk-in direction, and the torsion spring 38 will not engage the groove 37b of the memory disk 37 and the bent protrusion 29b of the lock plate 29. Memory board 37 to a possible position
A rotation biasing force for rotating the memory board 37 is applied to the memory board 37. A third spring 39, in this embodiment, the handle shaft 28, is wound around the end of the handle shaft 28 opposite to the operating handle 28a, and one end 3
9a is attached to the slot 28b provided at the end of the handle shaft 28, and the other end 39b is attached to the upper rail 2.
The first reduction gear 36 of the reduction gear 36 is locked to the first bracket 25 on the second side, and the first reduction gear 36 of the reduction gear 36 is attached to the handle shaft 28.
a provides a rotation urging force in the direction of engagement with the rack 24a of the memory rack 24.

Next, the operation of the above configuration will be explained. First, when performing a seat slide, the first
In the figure, the operating handle 28a is rotated in the direction of the arrow. Then, the lift lever 31, and
The lock lever 29 that the lift lever 31 comes into contact with rotates in the direction of the arrow, the engagement between the lock hole 29a of the lock lever 29 and the lock teeth 23a of the lock plate 23 is released, and the lift lever 31 rotates further. The gear arm 33 horizontally rotates around the pin 34, the first reduction gear 36a of the reduction gear 36 and the rack 24a of the memory rack 24 are disengaged, and the upper rail 22 becomes able to slide with respect to the lower rail 21. After performing the desired seat slide, when the force rotating the operating handle 28a is released, the lock lever 29 and the lift lever 31 are rotated in the opposite direction of the arrow by the rotation biasing force of the torsion springs 30 and 39. Then, the lock hole 29a of the lock lever 29 engages with the lock teeth 23a of the lock plate 23, and the first reduction gear 36a also engages with the rack 24a of the memory rack 24, resulting in the locked state shown in FIG. 1 again.

Next, a case will be described in which a walk-in is performed in FIG. 1 in a locked state. When the walk-in is performed, only the lock lever 29 rotates in the direction of the arrow, and the engagement between the lock hole 29a and the lock tooth 23a is released. Further, the engagement between the bending protrusion 29b and the groove 37b of the memory board 37 is also released, and the memory board 37 becomes rotatable. When the seat walks in, the upper rail 22 moves with the reduction gear 36 meshing with the memory rack 24, and the memory board 37 also rotates in accordance with the amount of movement of the upper rail 22. Next, when the walk-in is released, the bending protrusion 29b comes into contact with the inner circumferential surface A of the memory board 37. And Atsupareru 22
moves to the pre-walk-in position, the memory board 37 rotates with the bending protrusion 29b in contact with the inner circumferential surface A, and when the upper rail 22 comes to the pre-walk-in position, the bending protrusion 29b contacts the inner circumferential surface A. The curved protrusion 29b is the groove 3
7b, and furthermore, the lock hole 29a engages with the lock tooth 23a of the lock plate 23, and the lock state is again established, completing the return to the position before the walk-in.

According to the above configuration, the lower rail 21 and the upper rail 22 are locked by the lock hole 29a of the lock lever 29 provided on the upper rail 22 side and the lock plate 23 provided on the lower rail 21 side.
Since this is done by direct engagement with the lock teeth 23a, weight and play performance are not sacrificed. Since the memory disk 37 is rotated via the reduction gear 36, the diameter of the memory disk 37 can be made sufficiently small even when the stroke length of the seat slide is long. Further, when the operation handle 28 is operated during the walk-in, the meshing between the reduction gear 36 and the memory rack 24 is released, and the memory disk 37 becomes freely rotatable. Then, the memory board 37 is rotated by the torsion spring 38 to a position where the bending protrusion 29b and the groove 37b can engage, and when the walk-in is released, the bending protrusion 29b, the groove 37b, and the lock are rotated. The hole 29a and the lock tooth 23a engage, and the seat is immediately locked, allowing the seat position to be reset without having to once move the seat to obtain the lock state even to the erroneous memory position, as in the conventional case. Further, since the operating handle 28a is of a rotating type, the space under the seat cushion can be small. In addition, instead of using the hole provided in the lock plate as it is in the conventional example, the rack for rotating the memory board 37 is provided separately as the memory rack 24, and further,
Since the reduction gear 36 and the memory board 37 are made of resin, they mesh well and do not generate abnormal noise during walk-in.

Note that the present invention is not limited to the above embodiments.
For example, the reduction gear may be one stage. It is also possible to use a seat truck with one side lock.

(Effects of the invention) As explained above, according to the invention, the diameter of the memory board is small without sacrificing weight or play performance, and the memory is cleared even if the operation handle is operated during walk-in, making it possible to avoid complicated The seat can be reset to the optimal position without any procedures, and the operating handle is rotatable, making it possible to realize a seat track that does not generate abnormal noises during walk-in.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figures are a configuration diagram of the memory board, torsion spring, and gear arm in FIG. 1, FIG. 3 is a plan view showing a conventional example, and FIG. 4 is a side view of FIG. 3. 1, 21... Lower rail, 2, 22... Upper rail, 3, 23... Lock plate, 3a...
Side part, 3b, 29a... lock hole, 4... lock lever bracket, 4a... lock lever part,
5, 8, 10, 34, 35...pin, 6...compression spring, 7...memory board, 7
a, 23a...Lock tooth, 7b...Lock gear part, 7c...Lock groove, 7d...Memory board part,
9...walk-in lever, 9a...engaging protrusion,
9b...hole, 11...tension spring, 2
1a, 22a... Base wall portion, 24... Memory rack, 24a... Rack, 25... First bracket, 25a, 25b, 26a... Support portion, 26...
...Second bracket, 27...Pipe, 27a...
Hook protrusion, 28...Handle shaft, 28a
...Operation handle, 28b...Slot portion, 29...
...Lock lever, 29b...Bending protrusion, 29c...
...Wire hook, 29d...Lift lever contact protrusion, 30...Torsion coil spring (first
spring), 30a, 39a... one end, 30
b, 39b...Other end, 31...Lift lever, 3
1a... Lock lever contact projection, 32... Gear arm bracket, 33... Gear arm, 33a...
...One end, 33b...Other end, 36...Reduction gear, 36a...First reduction gear, 36b...Second reduction gear, 37...Memory board, 37a...Gear part, 37b...Groove, 37c...Protrusion, 38...Torsion coil spring (second spring),
38a...starting end, 38b...terminating end, 39...
Torsion coil spring (third spring).

Claims (1)

[Scope of utility model registration request] a lower rail fixed to the floor side; an upper rail slidably fitted to the lower rail; a lock plate provided on the lower rail side with lock teeth carved thereon; A carved memory rack, a pipe rotatably installed along the upper rail, a handle shaft rotatably inserted through the pipe, and a handle shaft fixed to the pipe and engaged with the lock plate. a lock lever that is released when the user walks in; a first spring that rotationally biases the pipe in the direction of engagement with the lock lever and the lock plate; a lift lever that abuts and rotates with the lock lever; a gear arm having a base end on the upper rail side and a horizontal rotation end pivotally supported on the lift lever; and a gear arm rotatably attached to the gear arm; a memory board having a reduction gear that can mesh with the memory rack, and an engagement part that is rotatably attached to the gear arm so that the reduction gear and the gear part mesh with each other, and that engages with the lock lever; , a second spring that biases the memory disc in a direction to engage the lock lever; and a third spring that biases the handle shaft in a direction in which the reduction gear engages with the memory rack. A seat truck characterized by having a spring.