JP2011011732A - Power seat adjuster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power seat adjuster which can perform various seat movements by a single motor, has a simple structure and whose cost can be reduced.SOLUTION: The power seat adjuster includes first to fourth connection portions 11-14 connected to various movement mechanisms of a vehicle seat, and is configured to change over the transmission of the rotation of an electric motor 1 to various movement mechanism of the seat according to the engagement state of coupling gear 21 and coupling 31 making up of the first to fourth connection portions. The changeover is performed by cams 61-64, which can press plates 51-54 fixed integrally to the couplings 21-24 of the first to fourth connection portions. The cams are provided on a shaft that can be rotated by an actuator.

Description

  The present invention relates to an apparatus that can adjust various movements of a vehicle seat (back and forth movement of the entire seat, tilting of a seat back, vertical movement of a seat cushion) by a single motor.

  In the vehicle seat, various movements such as front and rear movement of the entire seat, tilting of the seat back, and up and down movement of the seat cushion are controlled using a dedicated motor so that it can be adapted to the body shape and posture of the occupant. In general, there is a problem that the number of motors increases, but the weight of the seat increases and the cost increases.

  Therefore, Patent Document 1 discloses an apparatus that adjusts various movements of a sheet with a single motor. In the apparatus described in Patent Document 1, first to fourth clutches are disposed at the tip of a single motor, and each clutch moves back and forth over the entire seat, moves up and down in the front half of the seat, and moves up and down in the rear half of the seat. The movable plate is fitted to the output shaft of each clutch, and this movable plate comes into contact with the clutch receiving portion by the bias of the spring during normal operation. Although the power is transmitted continuously, when the excitation coil in the clutch is energized, the movable plate is attracted against the spring, and the power transmission from the motor is cut off. By switching between the state and the disconnected state, various movements of the sheet can be adjusted.

JP-A-6-87363

  The above-described device enables adjustment of various movements of the seat by switching the clutch on / off state. However, it is necessary to energize the excitation coils in each clutch, and a power supply and switch for that purpose must be incorporated. In other words, there is a problem that the structure is complicated and the cost is increased.

  The present invention has been made to solve the above-described problems, and provides an apparatus capable of adjusting various movements of a sheet by a single motor with an easy configuration and reducing costs. For the purpose.

In order to solve the above-described problem, a power seat adjusting device according to claim 1 is an electric motor capable of rotating forward and backward, and first to fourth connections that connect the electric motor and a vehicle seat moving mechanism. The first to fourth connecting portions include a coupling gear to which the rotation of the electric motor is transmitted, a coupling that can be fitted to the coupling gear, a spring that biases the coupling, The rotating shaft and the plate fixed integrally with the coupling are configured. The rotating shafts of the couplings of the first to fourth connecting portions are connected to a vehicle seat moving mechanism, and the first to fourth connecting portions are connected. The technical feature is that the cam capable of pressing each plate is disposed on a shaft having a handle fixed to the tip.

  The power seat adjusting device according to claim 1 includes first to fourth connecting portions, and the movement of the vehicle seat of the electric motor according to the coupling state of each coupling gear and the coupling constituting the first to fourth connecting portions. The transmission to the mechanism is switched, but the switching is performed by a cam that presses each plate integrated with each coupling of the first to fourth connecting portions, and various adjustments of the seat with an easy configuration Can be achieved, and the cost can be reduced. Further, since the shaft to which the cam is fixed is rotated by the operation of the handle, switching by manual operation is possible.

The perspective view which shows the principal part of the adjustment apparatus of a power seat Exploded perspective view of the first connecting part Explanatory drawing which shows the effect | action of a 1st connection part and a 1st cam The perspective view which shows the state which connected the adjustment apparatus of the power seat to each part of a sheet | seat

An embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the power seat adjusting device according to the present invention includes an electric motor 1 that can rotate forward and backward, a gear 3 a that is directly connected to an output shaft 2 of the electric motor 1, and a gear 3 b that meshes with the gear 3 a. A gear mechanism 3 configured, a first connecting portion 11 and a second connecting portion 12 to which rotation is transmitted from the gear mechanism 3, a third connecting portion 13 to which rotation is transmitted from the second connecting portion 12, and a third The 4th connection part 14 to which rotation is transmitted from the connection part 13, the 1st-4th cams 61-64 which can press the 1st-4th connection parts 11-14, and the 1st-4th cams 61-64 The shaft 4 is rotatably supported.

  As shown in FIG. 2, the first connecting portion 11 includes a first coupling gear 21 that can rotate by meshing with the gear 3 a, a first coupling 31 that can be fitted to the first coupling 21, and a first cup. The first spring 41 for biasing the ring 31 and the first plate 51 fixed integrally with the first coupling 31 are configured.

  The first coupling gear 21 has a through hole 21a through which a rotation shaft 31a of the first coupling 31 (to be described later) is inserted at the center of rotation, and a fitting hole 21b for fitting the first coupling 31 around the through hole 21a. And the external tooth 21c for meshing | engaging with the gear mechanism 3 is formed in the surrounding wall part.

  The first coupling 31 is formed with an integrally formed rotating shaft 31a and a fitting projection 31b for fitting with the fitting hole 21b of the first coupling gear 21 around the rotating shaft 31a.

  The first spring 41 biases the first coupling 31 so that the fitting protrusion 31b of the first coupling 31 is always fitted into the fitting hole 21b of the first coupling gear 21. When the first coupling gear 21 and the first coupling 31 are in the fitted state, the rotation of the first coupling gear 21 is transmitted to the first coupling 31, and the rotation shaft 31a of the first coupling 31 rotates. Become.

  The first plate 51 is integrally fixed to the tip of the rotating shaft 31a of the first coupling 31, and is in contact with a first cam 61, which will be described later, as shown in FIG. The first cam 61 has an asymmetric shape, and the contact position with the first plate 51 changes by rotating. By changing the contact position, the first plate 51 is pushed and pulled, and the first coupling 31 fixed integrally with the first plate 51 is pushed and pulled against the bias of the first spring 41. By the action of the first plate 51 and the first cam 61, the fitting of the first coupling 31 and the first coupling gear 21 is held or released.

  The shaft 4 directly connected to the first cam 61 has a handle 5 attached to the tip, and the shaft 4 can be rotated manually. In addition to the handle 5, an actuator 6 is provided as a means for rotating the shaft 4. A worm 8 is formed on the output shaft 7 of the actuator 6, and the worm 8 is connected directly to the shaft 4. By engaging, rotation of the actuator 6 can be transmitted to the shaft 4.

  Thus, by rotating the shaft 4 by the handle 5 or the actuator 6 and changing the contact position between the first plate 51 and the first cam 61, the fitting of the first coupling 31 and the first coupling gear 21 is maintained or It can be switched to the released state. As shown in FIG. 4, the rotating shaft 31a of the first coupling 31 is connected to the seat back-and-forth movement mechanism 15. When the seat front-back adjustment is performed, the first coupling 31 and the first coupling gear are used. By switching to the state in which 21 is fitted, the power of the electric motor 1 is transmitted to the first coupling 31, and adjustment can be performed.

  The second connecting portion 12 is a second coupling gear 22 that can rotate by meshing with the gear 3 b, a second coupling 32 that can be fitted to the second coupling 22, and a second coupling 32 that urges the second coupling 32. 2 springs 42 and a second plate 52 fixed integrally with the second coupling 32.

  The second plate 52 is in contact with the second cam 62, and the second cam 62 has an asymmetric shape similar to the first cam 61, but is fixed to the shaft 4 at an angle different from that of the first cam. Thus, the contact position with the second plate 52 changes by rotating. By changing the contact position, the second plate 52 is pushed and pulled, and the second coupling 32 fixed integrally with the second plate 52 is pushed and pulled against the bias of the second spring 42. By the action of the second plate 52 and the second cam 62, the fitting of the second coupling 32 and the second coupling gear 22 is held or released.

  The rotary shaft 32a of the second coupling 32 is connected to the vertical movement mechanism 16 at the rear of the seat. When the vertical adjustment of the rear of the seat is performed, the second coupling 32 and the second coupling 32 are moved by the handle 5 or the actuator 6. By switching to the state in which the coupling gear 22 is fitted, the power of the electric motor 1 is transmitted to the second coupling 32 and adjustment can be performed.

  The third connecting portion 13 includes a third coupling gear 23 that can rotate by meshing with the second coupling gear 22, a third coupling 33 that can be fitted to the third coupling 23, and a third coupling 33. The third spring 43 is energized and the third plate 53 is fixed integrally with the third coupling 33.

  The third plate 53 is in contact with the third cam 63, and the third cam 63 has an asymmetric shape similar to the first and second cams 61 and 62. It is fixed to the shaft 4 at different angles, and the contact position with the third plate 53 is changed by rotating. By changing the contact position, the third plate 53 is pushed and pulled, and the third coupling 33 fixed integrally with the third plate 53 is pushed and pulled against the bias of the third spring 43. By the action of the third plate 53 and the third cam 63, the fitting of the third coupling 33 and the third coupling gear 23 is held or released.

  The rotation shaft 33a of the third coupling 33 is connected to the seat back tilting mechanism 17, and when the tilt adjustment of the seat back is performed, the third coupling 33 and the third cup are operated by the handle 5 or the actuator 6. By switching to the state in which the ring gear 23 is fitted, the power of the electric motor 1 is transmitted to the third coupling 33 and adjustment can be performed.

  The fourth coupling portion 14 includes a fourth coupling gear 24 that can rotate by meshing with the third coupling gear 23, a fourth coupling 34 that can be fitted to the fourth coupling 24, and a fourth coupling 34. The fourth spring 44 and the fourth plate 34 fixed integrally with the fourth coupling 34 are configured.

  The fourth plate 54 is in contact with the fourth cam 64 and has an asymmetric shape similar to the first to third cams 61 to 63, but at an angle different from that of the first to third cams 61 to 63. The position of contact with the fourth plate 54 is changed by being fixed to the shaft 4 and rotating. By changing the contact position, the fourth plate 54 is pushed and pulled, and the fourth coupling 34 fixed integrally with the fourth plate 54 is pushed and pulled against the bias of the fourth spring 44. By the action of the fourth plate 54 and the third cam 64, the fitting of the fourth coupling 34 and the fourth coupling gear 24 is held or released.

  The rotating shaft 34a of the fourth coupling 34 is connected to the vertical movement mechanism 18 at the front of the seat. When the vertical adjustment of the front of the seat is performed, the handle 5 or the actuator 6 is used to By switching to the state in which the fourth coupling gear 24 is fitted, the power of the electric motor 1 is transmitted to the fourth coupling 34 and adjustment can be performed.

  As described above, various adjustments of the seat are performed by switching the coupling state between the coupling gear and the coupling of each coupling portion. For example, when performing the longitudinal adjustment of the seat, only the first coupling portion is brought into the mating state. The first cam 61 presses the first plate by the handle 5 or the actuator 6 so that the rotation of the electric motor 1 is transmitted to the seat back-and-forth movement mechanism 15, and the second to fourth cams 62 to 64 are the first ones. It becomes possible by rotating the shaft 4 at an angle that does not press the second to fourth plates.

  Similarly, when the other adjustment of the seat is performed, it is possible to rotate the shaft 4 to an angle at which the coupling gear and the coupling of the corresponding connecting portion can be fitted.

  Further, here, the first connecting portion 11 is the seat back-and-forth moving mechanism 15, the second connecting portion 12 is the up-and-down moving mechanism 16 at the rear of the seat, the third connecting portion 13 is the seat back tilting mechanism 17, and the fourth connecting portion is the seat. Although it corresponds to the front vertical movement mechanism 18, the arrangement of each mechanism and each connecting portion may be changed.

  As described above, the power seat adjusting device of the present invention rotates the shaft 4 by the handle 5 or the actuator 7 to change the contact position between each cam fixed to the shaft 4 and each connecting portion. , The coupling gear of the connecting part corresponding to the mechanism to be adjusted and the coupling are only fitted and the desired adjustment of the seat can be performed, and various adjustments of the seat (front and rear adjustment of the seat, The vertical movement of the front part of the seat, the vertical movement of the rear part of the seat, and the tilt adjustment of the seat back are possible.

DESCRIPTION OF SYMBOLS 1 Electric motor 3 Gear mechanism 4 Shaft 5 Handle 6 Actuator 8 Worm 9 Worm wheel 11 1st connection part 12 2nd connection part 13 3rd connection part 14 4th connection part

Claims (1)

An electric motor capable of rotating forward and reverse, and first to fourth connecting portions for connecting the electric motor and a vehicle seat moving mechanism;
The first to fourth connecting portions are integrated with a coupling gear to which rotation of the electric motor is transmitted, a coupling that can be fitted to the coupling gear, a spring that biases the coupling, and the coupling. Consisting of a rotating shaft and a plate fixed to
The rotating shafts of the couplings of the first to fourth connecting portions are connected to a vehicle seat moving mechanism,
A power seat adjusting device, wherein a cam capable of pressing each plate of the first to fourth connecting portions is disposed on a shaft connected to an actuator.

Images