JP6370621B2 - Seat frame movable device - Google Patents

Description

  The present invention relates to a seat frame movable device.

  A vehicle seat walk-in device has been proposed in which a vehicle seat slides forward relative to a vehicle floor in conjunction with a forward reclining operation of a vehicle seat back on a seat cushion of the vehicle seat (Patent Document 1). ).

JP 2000-190760 A

  According to the present invention, in such a walk-in device for a vehicle seat, the forward / backward movement of the vehicle seat can be automatically slid back and forth in conjunction with a reclining operation or the like, and can also be manually placed at any position It is to provide a novel seat frame movable device.

  In order to achieve the above-mentioned object, the present invention employs the following means.

The seat frame movable device according to the present invention is:
An upper rail to which a seat frame of a vehicle seat is attached;
A lower rail that slidably supports the upper rail;
A constant load spring that urges the upper rail to move in either of the front and rear directions with respect to the lower rail; and a lock member that locks or releases the constant load spring;
With
The constant load spring includes a front constant load spring that moves the upper rail forward and a rear constant load spring that moves the upper rail backward .

  By adopting such a configuration, when the vehicle seat is moved, the seat frame can be moved with the same force regardless of the position of the front and rear.

Also, by providing a movable device that moves in both the forward and backward directions, the force to move in the front-rear direction of the seat frame is balanced in the front-rear direction, so that the seat frame can be fixed at an intermediate position in the front-rear direction. it can.

  Further, in the seat frame movable device according to the present invention, the constant pulley provided at the end of the lower rail and the constant load spring are smaller in torque than the first constant load spring and the first constant load spring. And a transmission member installed between the first constant load spring and the second constant load spring via a constant pulley. Also good. By adopting such a configuration, it is possible to move the seat frame back and forth by applying different spring forces to the front and rear. For example, by operating the first constant load spring on the front side and the second constant load spring on the rear side, the torque of the first constant load spring on the front side is strong, so that the first constant load spring moves forward. Conversely, if you want to move backwards, you can do the reverse.

  Furthermore, the seat frame movable device according to the present invention further includes a motor for winding the spring of the constant load spring, and the motor is moved to move either the front side constant load spring or the rear side constant load spring. There may be provided a motor moving link member which can be switched between. By adopting such a configuration, it is not necessary for the operator to take up the spring, and the energy of the spring can be stored by electric power. Further, the first constant load springs of both the front side constant load spring and the rear side constant load spring can be wound by one motor.

  Furthermore, the seat frame movable device according to the present invention further includes a moving member that can move to two different positions depending on the position of the upper rail with respect to the lower rail, and the position of the motor moving link member is adjusted by the movement of the moving member. It may be characterized by being switchable. By adopting such a configuration, the motor can be automatically moved to the required side of either the first movable device or the second movable device depending on the position of the seat. This eliminates the need for a separate device for switching the position of the motor.

Furthermore, in the seat frame movable device according to the present invention, the lock member has a wire receiving portion that is rotatable about a center,
The wire connected to the moving member on both sides of the rotating shaft of the wire receiving part and the operating part operated by the operator,
The moving member is movable to two different positions, a position where the wire is loosened and a position where the wire is tensioned,
The lock member may be unlocked only at a position where the wire is tensioned . By adopting such a configuration, the wire can be tensioned or loosened depending on the position of the moving member. Therefore, if you do not want to move the first constant load spring at a predetermined position on the seat frame, you can operate the operating unit by setting the moving member so that the wire tension is relaxed. However, it is possible to prevent the first constant load spring from being wound by the motor.

  According to the seat frame movable device according to the present invention, the forward / backward movement of the vehicle seat can be automatically slid back and forth in conjunction with the reclining operation or the like, and can also be manually placed at any position. A movable seat frame can be obtained.

FIG. 1 is a perspective view showing a seat frame movable device 100 according to the embodiment. FIG. 2 is a schematic side view showing the internal structure of the seat frame movable device 100 according to the embodiment. FIG. 3 is a schematic side view illustrating a part of the internal structure of the seat frame movable device 100 according to the embodiment. FIG. 4 is a schematic side view illustrating a part of the internal structure of the seat frame movable device 100 according to the embodiment. FIG. 5 is a schematic diagram illustrating the structure of the lock member 60 of the seat frame movable device 100 according to the embodiment. FIG. 6 is a schematic side view illustrating a state in which the seat frame movable device 100 according to the embodiment is on the front side.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments and drawings described below exemplify a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations. Moreover, the same or similar code | symbol is attached | subjected to the corresponding component in each figure.

  As shown in FIG. 1, the seat frame movable device 100 according to the present embodiment is a device that moves a seat frame 2 to which a vehicle seat (not shown) is attached back and forth, and slides the seat frame 2 back and forth. It is arranged in parallel with the slide rail 3 that is freely movable. Since it arrange | positions under the vehicle seat by arrange | positioning between the slide rails 3 of both sides, it does not get in the way and is suitable.

  The seat frame movable device 100 mainly includes a lower rail 10 fixed to a vehicle floor in parallel with the slide rail 4 and an upper member 20 slidably disposed on the lower rail 10.

  The lower rail 10 is made of a long member having a substantially rectangular cross section, and has an opening 11 opened in the longitudinal direction at the center of the upper surface. A part of the upper member 20 is inserted into the opening 11 in the lateral direction. The upper member 20 can be slid back and forth while preventing rattling. As shown in FIG. 2, a fixed pulley 12 on which a transmission member 40 is installed is provided in the vicinity of the front side and the rear side of the lower rail 10. On the inner bottom surface of the lower rail 10, a flip-up portion 13 having a height higher than the bottom surface is provided in order to jump a moving member to be described later.

  The upper member 20 has a movable function of sliding back and forth with respect to the lower rail 10, and as shown in FIG. 2, mainly the first constant load spring 31 and the second constant load spring 32, and these constant load springs. 30, a motor 50 for winding the spring of the first constant load spring 31, and a lock for directly or indirectly locking the first constant load spring 31 wound with the spring. A member 60 and a holding plate 80 for holding them are provided.

  As shown in FIGS. 2 and 3, each of the first constant load spring 31 and the second constant load spring 32 has two drums, and the springs are wound around the two drums to transmit the wound. Regardless of the drawing length of the member 40, the spring can always pull the transmission member 40 with a constant force. These constant load springs 30 are mainly composed of a first constant load spring 31 having a strong winding strength that has a purpose of winding the transmission member 40 and positively moving the upper member 20, and that the transmission member 40 is mainly loosened. The second constant load spring 32 has a lower torque than the first constant load spring 31 described above, which has the purpose of preventing the transmission member 40 from being tensioned and winding it. One set of these constant load springs 30 is arranged before and after the holding plate 80.

  The transmission member 40 is not particularly limited as long as it is a string-like member, such as a wire, a plastic thread, a cable, or a plate-like metal plate. The transmission member 40 is stretched over the first constant load spring 31 and the second constant load spring 32 via the constant pulleys 12 provided near the front end and the rear end of the lower rail 10, respectively. The transmission member 40 winds up the transmission member 40 around the first constant load spring 31 because the first constant load spring 31 is stronger than the second constant load spring 32 in a state where no force is applied to the constant load spring 30 from the outside. It is biased in the direction (the direction of the arrow in FIG. 2).

  The motor 50 is for winding the spring of the first constant load spring 31. By moving the motor 50, the first constant load spring 31 is rotated in the direction opposite to the arrow in FIG. The taken transmission member 40 has a function of delivering to the second constant load spring 32. The motor 50 may drive the first constant load spring 31 directly. However, the motor 50 may be interlocked with the first constant load spring 31 through a plurality of gears in order to arbitrarily adjust the rotational speed, the rotational torque, and the like. Good. In the present embodiment, a force is transmitted to the first constant load spring 31 via the first intermediate gear 91, the second intermediate gear 92, and the third intermediate gear 93, as indicated by arrows in FIG. Although the motor 50 may be provided for each of the first constant load springs 31 on the front side and the rear side, in the present embodiment, the motor 50 is attached to the motor holding member 51 having the rotation shaft 51a at a position away from the motor 50. The first constant load springs 31 on the front and rear sides can be selected and wound by rotating the motor holding member 51. The switching of the position of the motor 50 includes a motor moving link member 52 that rotates while sandwiching the motor 50 around the rotation shaft 52a, and a moving member 53 that moves the motor moving link member 52. Yes. The moving member 53 is formed so as to be rotatable by a rotating shaft 54 and is urged in a direction opposite to the flip-up direction. The moving member 53 abuts against the flip-up portion 13 by the movement of the upper member 20, so that the moving member 53 is flipped up, and the motor moving link member 52 is moved by this jumping up, and the position of the motor 50 is changed to the front side. Or the position can be swapped to the left. Specific movement will be described later.

  The lock member 60 is for temporarily fixing the urging force of the first constant load spring 31 wound by the spring. The lock member 60 can be unlocked by operating an operation portion (not shown) such as an operation lever provided in the vehicle seat or in the vicinity thereof, and the urging force of the first constant load spring 31 is released. Can do. The configuration of the lock member 60 itself is not particularly limited as long as the first constant load spring 31 can be opened by an operation lever or the like. In the present embodiment, as shown in FIG. 5, the lock member 60 is transmitted with the lock piece 61 having gear teeth meshing with the gear teeth (not shown in the drawing) of the first intermediate gear 91 and the operation of the operation unit. In order to transmit the drawn wire to the lock piece 61, a lock piece mediating member 62 is provided. One end portion of the lock piece 61 is a rotation shaft 61a, and the first constant load spring 31 is locked by engaging or disengaging the gear teeth formed on the opposite end portion with the gear. Or can be released. The lock piece 61 is urged in the direction of meshing with the gear, and is disposed at a locked position when no force is applied. The lock piece mediating member 62 has a shaft portion 63 and a wire receiving portion 64 that is rotatably attached to the shaft portion 63, and two wires are attached to both sides of the rotation shaft. Therefore, if the wires are pulled with both wires in tension, the lock can be released as shown in FIG. 5B, but if one of them is loose, as shown by the dotted line in FIG. 5A It is formed so that it cannot be unlocked when in a state.

  The seat frame movable device 100 configured as described above is movable as follows. Hereinafter, for each component, the rear member is indicated by a and the front member is indicated by b. First, a state where the vehicle seat is disposed rearward, that is, a state where the upper member 20 is disposed rearmost is shown in FIG. In this state, the rear side first constant load spring 31a has already been wound by the motor 50, and the transmission member 40 is wound around the rear side second constant load spring 32a. In this state, the first constant load spring 31a is urged in the direction of winding the transmission member 40 as indicated by an arrow, and the second constant load spring 32a is also urged in the direction of winding. However, as in the state of FIG. 5A, the first intermediate gear 91 is fixed by the rear side lock member 60a, so that the second intermediate gear 92 and the third intermediate gear 93 meshed with the first intermediate gear 91 are One constant load spring 31a is fixed. Therefore, in this state, the rear first constant load spring 31a does not perform a winding operation. At this time, the rear side moving member 53a is flipped up to the jump-up position by the jump-up portion 13, and the wire 97a is loosened by the jump-up. The wire 97a is connected to one of the wire receiving portions 64 of the lock member, and the other wire is connected to the front operation portion. The front operation unit can be operated by a person seated on the vehicle seat. For example, a lever or the like disposed on the back side or the side of the seat can be considered. Even if the wire 97b is accidentally pulled by the front operation portion in this state, the wire receiving portion 64 only tilts and the lock member 60 is prevented from being lifted and unlocked. On the other hand, the motor 50 is in mesh with the front first intermediate gear 91b by the rear side moving member 53a being flipped up.

  On the other hand, the front side first constant load spring 31b has already been rotated in the direction of pulling out the transmission member 40 by the motor 50. In this state, the front first constant load spring 31b is urged in the direction of the arrow. However, since it is locked by the front side lock member 60b similarly to the rear first constant load spring 31a, the winding operation is not performed. Since the front side moving member 53b is not flipped up, the wire 97c is under tension, and the lock member 60 is lifted by operating the rear operation portion and pulling the wire 97d, so that the lock can be released. It has become. The rear operation unit may be a lever or the like provided on the vehicle seat at a position where a person on the back side, for example, a person on the rear seat can operate. Preferably, the person in the rear seat may synchronize with the reclining lever that tilts the seat back.

From this state, when the rear operation unit is operated and the wire 97d is pulled, the fixation of the front side lock member 60b and the front side first intermediate gear 91b is released. By this release, a force is applied in a direction in which the front transmission member 40b is pulled in by the urging force of the front first constant load spring 31b. At this time, since the rear first constant load spring 31a is locked by the lock member 60, the force pulling the rear transmission member 40a is only the rear second constant load spring 32a having a weak torque. Therefore, the first constant load spring 31b winds up the front transmission member 40b, and the rear transmission member 40a wound up by the rear second constant load spring 32a is pulled out. As a result, the entire upper member 20 moves forward. As shown in FIG. 5b, the unlocked lock member 60 is engaged with the lock member as shown in FIG. 5b while moving forward and until the spring is wound again by the front first constant load spring 31b. The piece 66 prevents the lock member 60 from locking the first constant load spring 31b (first intermediate gear 91). Specifically, in the locked state, as shown in FIG. 5A, the locking member locking piece 66 pushes the side of the locking member locking piece 66 provided on the intermediate gear and moves. The lock member 60 can be freely released and locked by the portion 67. However, when the lock member 60 is released and the front side first constant load spring 31b rotates so as to pull in the front side transmission member 40b, the intermediate gear 97 interlocked therewith becomes as shown in FIG. 5B. Rotating in the direction of the arrow, the contact with the locking member locking piece 66 is released, the locking piece 61 is locked so as not to move in the locking direction, and the unlocked state is maintained.

  When the upper member 20 moves forward, the front-side moving member 53b is flipped up by the flip-up portion 13, and the motor 50 moves backward. Then, the rear first constant load spring 31a is wound up by the motor 50, the transmission member 40 is opened and moved to the second constant load spring 32a side. At the same time, the rotation of the motor 50 returns the gear to the state shown in FIG. 5A. Due to this rotation, when a certain amount of spring is pulled, the locking member locking piece 66 releases the locking piece 61 by the locking piece abutting portion 67. Then, the first intermediate gear 91 is fixed by the lock piece 61, and the winding of the first constant load spring 31a is stopped. This avoids overwinding the spring.

  Thus, both the front first constant load spring 31b and the rear first constant load spring 31a are wound by the motor 50, and both are locked by the lock member 60. At this time, since the front side moving member 53b is jumped up to the flip-up position by the jump-up portion 13, the wire 97c is loosened by the jump-up. Therefore, even if the wire 97d is accidentally pulled by the rear operation portion, the wire receiving portion 64 only tilts, and the lock member 60 is lifted and the lock is prevented from being released. On the other hand, when the front side moving member 53b is flipped up, the motor 50 is engaged with the rear side first intermediate gear 91a.

  From this state, when the front operation portion attached to the front surface side of the seat is operated and the wire 97b is pulled, the fixation between the rear side lock member 60a and the rear side first intermediate gear 91a is released. By this release, a force is applied in the direction in which the rear transmission member 40a is pulled in by the biasing force of the rear first constant load spring 31a. At this time, since the front side first constant load spring 31b is locked by the lock member 60, the force pulling the front side transmission member 40b is only the front side second constant load spring 32b having a weak torque. Therefore, the rear side first constant load spring 31a winds up the rear side transmission member 40a, and the front side transmission member 40b wound around the front side second constant load spring 32b is pulled out. Thereby, the whole upper member 20 moves backward. The released lock member is moved backward and until the rear first constant load spring 31a is taken up again by the motor 50, the rear lock member 60a is moved by the lock member locking piece 66 in the same manner as described above. The rear first constant load spring 31a (first intermediate member) is prevented from being locked.

  When the upper member 20 moving rearward is moved, the rear side moving member 53a is flipped up by the jump-up portion 13, and the motor 50 moves forward. And the front side 1st constant load spring 31b is wound up with the motor 50, the transmission member 40 is open | released, and it moves to the 2nd constant load spring 32b side. The rear flip-up portion 13 is set to be longer than the front flip-up portion. This is because the position of the seat is not necessarily arranged at the rearmost end when operating from the rear operation section, so that it can be operated even when the seat is arranged before the rearmost end. is there.

  Thus, both the front first constant load spring 31b and the rear first constant load spring 31a are in a state where the spring is wound by the motor 50, and both are fixed by the lock member 60, and the initial state It will be in the same state. Thereafter, by repeating the above operation, the seat can be moved back and forth.

  According to the seat frame movable device 100 according to the present embodiment, the seat frame can be moved back and forth simply by operating the lever. Moreover, if it moves manually in the locked state, it will move against the torque of the weak second constant load spring, so it can be moved easily. In addition, since constant load springs that always have a constant torque are used on both sides, the seat frame will not be applied in the longitudinal direction regardless of the seat position unless the locking member is released. Can be fixed at any position on the throat.

  In addition, by sharing or synchronizing the rear operation part with the reclining lever, the rear seat person moves the seat back forward and at the same time the vehicle seat moves forward. Can be provided.

  The present invention is not limited to the above-described embodiments, and can be implemented in various modes as long as they belong to the technical scope of the present invention.

  As shown in the above-described embodiment, the present invention can be industrially used as a seat frame movable device for attaching a vehicle seat.

DESCRIPTION OF SYMBOLS 2 ... Seat frame, 3 ... Slide rail, 10 ... Lower rail, 11 ... Opening part, 12 ... Fixed pulley, 13 ... Bounce-up part, 20 ... Upper member, 40 ... Transmission member, 40a ... Rear side transmission member, 40b ... Front Side transmission member, 50 ... motor, 51 ... motor holding member, 51a ... rotating shaft, 52 ... motor moving link member, 52a ... rotating shaft, 53 ... moving member, 53a ... rear side moving member, 53b ... front side moving member 54 ... Rotating shaft, 60 ... Lock member, 60a ... Back side lock member, 60b ... Front side lock member, 61 ... Lock piece, 61a ... Rotating shaft, 62 ... Lock piece mediating member, 63 ... Shaft part, 64 ... Wire receiving portion, 66 ... locking member locking piece, 67 ... locking piece contact portion, 80 ... holding plate, 91 ... first intermediate gear, 91a ... rear side first intermediate gear, 91b ... front side first intermediate gear 92 ... 2 intermediate gear, 93 ... third intermediate gear, 97 ... intermediate gear, 97a ... wire, 97b ... Wire, 97c ... wire, 97 d ... wire, 100 ... seat frame movable device.

Claims (5)

An upper rail to which a seat frame of a vehicle seat is attached;
A lower rail that slidably supports the upper rail;
A constant load spring that urges the upper rail to move in either of the front and rear directions with respect to the lower rail; and a lock member that locks or releases the constant load spring;
With
The seat frame movable device according to claim 1, wherein the constant load spring includes a front side constant load spring that moves the upper rail forward and a rear side constant load spring that moves the upper rail backward . A fixed pulley provided at an end of the lower rail;
The constant load spring includes a first constant load spring and a second constant load spring having a small torque with respect to the first constant load spring,
The seat frame movable device according to claim 1, further comprising a transmission member provided between the first constant load spring and the second constant load spring via the constant pulley. Furthermore, a motor for winding the spring of the constant load spring is provided,
The seat frame movable device according to claim 2, further comprising: a motor moving link member that is movable to the front side constant load spring or the rear side constant load spring by moving the motor. . Furthermore, a movable member that can move to two different positions according to the position of the upper rail with respect to the lower rail is provided.
The seat frame movable device according to claim 3, wherein the position of the motor moving link member can be switched by the movement of the moving member. The lock member has a wire receiving portion that is rotatable about a center,
The wire connected to the moving member on both sides of the rotating shaft of the wire receiving part and the operating part operated by the operator,
The moving member is movable to two different positions, a position where the wire is loosened and a position where the wire is tensioned,
The seat frame movable device according to claim 4 , wherein the lock member can be unlocked only at a position where the wire is tensioned .

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