JPS61278438A - Rotary type seat for vehicle - Google Patents

Abstract

PURPOSE:To enable the seat rotation to be effected either manually or automatically as required in getting in or out of a vehicle by providing both a drive means which drives a seat cushion to rotate a seat between the front and an entrance, and a clutching means which disconnects the said drive means from the seat cushion. CONSTITUTION:A round sliding plate 15 which is rotable around a rotating shaft 1, is provided on the upper surface of a base plate 12 which moves back and forth along a rail 11 through a sliding plate 14, and a support plate 16 is installed on the sliding plate 15 so as to support a seat cushion S. A rack 25 is provided on the support plate 16 to be geared with a pinion 24 which is rotated around a shaft 26 fitted onto a support member 2a which is an integral part of a housing. A pinion 32 rotated by a motor 3 for clutching is meshed with a rack 33 which is rotatably connected with the shaft 26. This causes the motor 2 to be displaced while it rotates allowing a pinion 24 geared with the rack 25 to be disconnected each other, when a pin 34 located on the rack 33 comes in contact with the motor housing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotating vehicle seat that rotates to facilitate getting on and off a vehicle.

[Prior Art] The driver's seat of a vehicle is usually adjusted to maintain the optimum posture of the occupant during driving, and therefore, the occupant is forced to take a relatively uncomfortable posture when getting in and out of the vehicle.

Therefore, a rotary seat has been proposed that allows smooth boarding and exit by rotating the seat in the direction 4 of the entrance and exit when getting on and off the vehicle (Japanese Patent Application Laid-open No. 57-22923,
No. 8-214423).

[Problems to be Solved by the Invention] By the way, in the conventional rotary seat described above, the seat cushion supported on the vehicle floor is rotated entirely manually in the former case, and entirely automatically by a drive motor in the latter case. It's forcing me.

However, in the case of a fully manual type, it is cumbersome for the occupant to rotate the seat in and out of the vehicle each time they start getting on or finish getting off the vehicle. There is a problem of having to coordinate movements.

SUMMARY OF THE INVENTION In view of these problems, an object of the present invention is to provide a rotatable vehicle seat that allows users to arbitrarily select manual mode or automatic mode for each step of getting on and off a vehicle.

[Means for Solving the Problems] As shown in FIG. 1, the vehicle seat of the present invention comprises a seat cushion S rotatably supported on a support shaft 1 erected on a vehicle floor F, and the seat cushion S. A drive means 2 connected to the cushion S to rotate it between the front direction and the entrance/exit direction, a clutch means 3 for connecting and disconnecting the seat cushion S and the drive means 2, and a control means 4 for operating the clutch means 3. It is equipped with.

[Operations and Effects] According to the vehicle seat described above, the control means 4 operates the clutch means during each arbitrary step of getting on and off the vehicle, and it is possible to select automatic manual rotation of the seat.

[Embodiment] In FIG. 1, the seat cushion S of the driver's seat is rotatably supported by a support shaft 1 provided perpendicularly to the vehicle floor F, and can rotate as shown by the chain line in the figure. A rotation motor 2 for rotationally driving the seat cushion S, and a clutch motor 3 for operating a clutch mechanism interposed between the motor 2 and the seat cushion S, which will be described later, are disposed on the lower surface of the seat cushion S. Each of the motors 2.3 is connected to a control device 4 by a cable 41, thereby controlling the rotation.

The control device 4 includes a seating sensor 51 embedded in the seat cushion S, a reset switch 52 provided in the seat cushion S, an ignition switch 53 provided in the handle, and a door opening/closing angle sensor 54 provided in the door B1.
etc. are connected.

The opening/closing angle sensor 54 has a linear potentiometer, one end of a lever member connected to a movable contact of the potentiometer is fixed to the body side, and outputs an output signal according to the opening/closing angle of the door.

Details of the rotation mechanism of the driver's seat are shown in FIGS. 2 and 3. Note that FIG. 2 is a cross-sectional view taken along the line II--I in FIG. 3, and FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG.

In the figure, reference numeral 11 indicates a parallel rail provided on the vehicle floor F toward the vehicle longitudinal direction (horizontal direction in the figure), and a base plate 12 is placed on the rail 11 so as to be able to slide along this. is. The base plate 12 is a lever 1 having a known structure.
3 to move to an arbitrary position on the rail 11 and position it.

On the upper surface of the second half of the base plate 12 is a circular) speech and behavior plate 1.
4, and a sliding plate 15 of the same shape is brought into contact with the sliding plate 14 from above. The sliding plate 15 has a supporting shaft 1 protruding from the bottom surface of the center thereof, which passes through the sliding plate 14. Therefore, the sliding plate 15 is rotatable around the support shaft 1. Then, on this sliding plate 15, the seat cushion S
A support plate 16 supporting the is integrally joined.

The front half of the base plate 12 is stepped and lowered, and the rotation motor 2 is provided here. The motor 2 is integrated with a gear box 21, and inside the gear box 21 is a worm 2 attached to the motor shaft, as shown in FIG.
2 and a worm wheel 23 that meshes with the worm wheel 2. A rotating shaft 231 of the worm wheel 23 protrudes from the upper surface of the gear box 21, and a pinion 24 is provided at the tip thereof. The pinion 24 meshes with a rack 25 provided on the lower surface of the support plate 16, and the tooth-shaped surface of the rack 25 has an arc shape centered on the support shaft 1.

As a result, when the motor 2 rotates, rotational force is transmitted from the pinion 24 to the rack 25, causing the seat to rotate around the support shaft 1.

A support portion 2a is protruded from the side wall of the housing of the motor 2, and the support portion 2a is rotatably coupled to a shaft member 26 provided on the base plate 12.

A lever part 2b is also protruded from the housing, and the tip of the lever part 2b is connected to the base plate 1 by a spring 27.
It is connected to the stepped part of. The motor 2 is biased clockwise around the shaft member 26 by the spring 27, and the pinion 24 elastically contacts and meshes with the rack 25.

The base plate 12 is provided with a clutch motor 3 for operating a clutch mechanism whose structure will be described in detail below. The motor 3 is integrated with a gear box 31, and the gear box 31 has the same structure as the gear box 21 described above. A pinion 32 provided at the tip of the rotating shaft protruding from the gear box 31 is engaged with a semicircular rack 33 rotatably connected to the shaft member 26.

When the motor 3 is rotated, the rack 33 to which rotational force is applied by the pinion 32 rotates counterclockwise around the shaft member 26, and the pin 34 provided on the rack 33 comes into contact with the housing of the motor 2.

As a result, the motor 2 rotates counterclockwise together with the rack 33, and the engagement between the pinion 24 and the rack 25 is released.

Note that the rotation end of the seat cushion S is connected to the support plate 16.
A rod-shaped striker 17 protruding from the bottom surface of the base plate 12
The end of rotation of the rack 33 is detected when the striker portion 33a protruding from this comes into contact with the limit switches 35, 36.

FIG. 5 shows the hardware configuration of the control device 4. As shown in FIG.

The device 4 includes an input interface 41, a microcomputer 42, an output interface 43, a current detection circuit 44 that detects the current value of the motor 2, and an opening/closing angle detection circuit 45 that converts the output signal of the opening/closing angle sensor 54 into impedance. There is.

Below, the operation explanatory diagram of Fig. 6 and Figs. 7 to 10 are explained below.
An example of the operation of the vehicle seat will be explained with reference to the program flowchart shown in the figure.

When the seat cushion S is in the original position shown in FIG. 6(1), the parking of the vehicle is confirmed by turning the ignition switch 53 OFF in step 101 of FIG. 7, and then the door opening/closing angle θd is detected. (step 102). When the door B1 is opened and its opening/closing angle θd exceeds the seat rotatable angle θ1, it is checked whether the seating sensor 51 is activated (steps 103 and 104). If the seating sensor 51 is operating, the program proceeds to the program shown in FIG. 9, and if it is not operating, the program proceeds to the program shown in FIG. 8.

In FIG. 8, the drive motor 2 is rotated forward in step 201, and the seat cushion S is rotated in the direction of the entrance/exit until the limit switch 18 is turned on (steps 201, 206, and 207). The position of the seat cushion S in this case is shown in FIG. 6(2). After this, proceed to the program shown in Figure 9. During the above rotation, when the door opening/closing angle θd becomes less than 61 degrees, it is determined that the rider has stopped riding, and the program proceeds to the program shown in FIG. 10 (step 20).
3). Furthermore, if the current (2) of the motor 2 exceeds the allowable value I0 during rotation, the motor 2 is stopped as a motor overload (steps 204, 205, 208).
After confirming that the reset switch 52 has been pressed, the program proceeds to the program shown in FIG. 10 (step 209).

In FIG. 9, the clutch motor 3 is rotated in the reverse direction until the limit switch 36 is turned ON (step 3).
01.302.303). This is shown in FIG. 6(3).

In this state, the pin 34 of the rack 33 abuts against each other, causing the motor 2 to rotate, and the engagement between the pinion 24 and the rack 25 is released. Thereby, the seat cushion S can be freely rotated manually. Therefore, when the occupant sits down and twists his or her hips, the seat cushion S rotates inward of the vehicle and returns to its original position (FIG. 6 (4)). If the passenger door Bl is closed in this state, step 30 in FIG.
At 4.305.306, it is detected that the door opening/closing angle θd has become less than the door closing angle θO, and the program proceeds to the program shown in FIG. Then, in steps 401, 402, and 403, the motor 3 is rotated forward until the limit switch 35 is turned on. As a result, the pinion 24 and the rack 25 mesh again, and the seat cushion S becomes locked (
Figure 6 (1)). In this case, steps 404 and subsequent steps are not substantially executed.

During the program shown in FIG. 9 above, if the occupant is not seated and the door opening/closing angle θd becomes less than the angle θ1,
Proceed to the program shown in the figure (steps 305 and 307). This corresponds to a case where the passenger stops riding. In steps 401 to 403 of FIG. 10, the pinion 24 and the rack 25 are engaged, and then the motor 2 is rotated in the reverse direction, and the seat cushion S is rotated inward until the limit switch 19 is turned on and returned to the original position. Revert (step 404.4
07.408). During this rotation, the current ■ of motor 2 reaches the allowable value ■. If it exceeds the motor 2, the motor 2 is stopped as a motor overload (step 405.40).
6.409) After confirming that the reset switch 52 has been pressed, the motor 2 is rotated again (step 410).

In step 104 in FIG. 7 above, the seating sensor 51
If the program is running, the program shown in FIG. 9 is executed. That is, since the engagement between the pinion 24 and the rack 25 is released in steps 301 to 303, the seat cushion S rotates toward the entrance/exit in accordance with the twisting of the occupant's waist. When the occupant gets out of the vehicle and begins to close the door, the steps progress from 304 to 305 to 307, and then the program shown in Figure 10 is executed, and the seat cushion S automatically rotates inward of the vehicle and returns to its original position. .

According to the above embodiment, when the door is opened at the beginning of getting on the train, the seat cushion S automatically rotates toward the entrance, and when the door begins to close after getting off the vehicle, the seat cushion S is automatically moved inward of the vehicle. Rotate and return to the original position. When getting on and off the vehicle, the clutch mechanism disconnects the seat cushion S from the rotation motor 2, so that the seat cushion S is rotated by the movement of the occupant's hips. In this way, the occupant does not have to take the trouble of rotating the seat inward or outward when starting to get on the vehicle or finishing getting off the vehicle, and each occupant can get on and off the vehicle on his or her own basis.

Furthermore, when either boarding or disembarking is performed automatically, the program shown in Figure 11 is executed between the programs shown in Figures 8 and 10 in the former case, and the program shown in Figures 7 and 10 is executed in the latter case. The program shown in FIG. 12 is executed between the programs shown in FIG.

The driving mechanism for the rotary seat is not limited to the above embodiment, and a hydraulic, pneumatic, or other driving mechanism may be used.

The clutch mechanism is not limited to the embodiment described above, and a clutch of another mechanism such as an electromagnetic clutch may be used.

Detection of the door opening/closing angle is not limited to the above embodiment, and a switch or a pulse encoder may be provided instead of the polantiometer. Furthermore, the door opening/closing angle may be detected by providing a sensor in the door hinge section instead of the door checking section, or by measuring the position of the door using ultrasonic waves or the like.

A configuration may be adopted in which a pattern selection switch is added to the above-mentioned embodiment so that the operation pattern can be selected according to the intention of the occupant.

Furthermore, instead of the ignition switch, a sensor may be provided on the parking brake, shift lever, etc., and the state of the sensor may be used to confirm whether the vehicle has stopped. Alternatively, a vehicle speed sensor may be used to confirm that the vehicle has stopped.

In the embodiment described above, the door opening/closing angle sensor 54 is used as a signal to return the seat cushion S to the front after the occupant leaves the seat to get off the vehicle, but the signal from the seating sensor 51 indicates that the occupant leaves the seat. It may be configured such that the seat cushion S is returned to the front direction based on this signal.

A pulse generator is attached to the drive shafts of the rotation motor 2 and the clutch motor 3, and the rotation angle of the seat cushion S and the engagement/disengagement of the clutch mechanism are determined based on the number of pulses generated from the pulse generator, and the limit switches 18, 19. 35.36 may be omitted.

In the embodiment described above, the seat cushion S is configured to rotate toward the front when the door opening/closing angle falls below a certain value, but the output of the door opening/closing angle sensor 54 indicates whether the door is moving in the opening direction or is closed. It may be determined whether the seat cushion S is moving in the closing direction, and if the seat cushion S is moving in the closing direction, the seat cushion S may be rotated toward the front.

[Brief explanation of drawings]

1 to 10 show a first embodiment of the present invention,
Figure 1 is a plan view of the vehicle driver's seat, Figure 2 is a partially sectional side view of the seat, and the cross section is taken along the line ■-■ in Figure 3;
The figure is a partial cross-sectional view of the seat rotation mechanism, the cross-section is taken along the line ■-■ in Figure 2, Figure 4 is a cross-sectional view taken along the line IV-IV in Figure 3, and Figure 5 is the control device. Hard configuration diagram, No. 6
The figures are schematic plan views showing the operation of the seat, Figures 7 to 1.
Figure 0 is a computer program flowchart, 1st
1 and 12 are program flow charts showing other embodiments of the present invention. 1... Support shaft 2... Rotation motor (drive means) 24...
... Pinion 25 ... Rack 26 ... Shaft member (fulcrum of motor housing) 3
...Clutch motor (clutch means) 33.
...Clutch rack 34...Pin 37...Spring 4...Control device S...Seat cushion 1st Part 3 Figure 4 Surface 1 So J4 Figure 6 Figure 6 Figure 11 Figure 12 Figure 9 Figure 10

Claims (4)

[Claims] (1) A seat cushion rotatably supported on a support shaft erected on the vehicle floor; a driving means connected to the seat cushion for rotationally driving the seat cushion between the front direction and the entrance/exit direction; and the seat cushion. A rotary vehicle seat comprising a clutch means for connecting and connecting a cushion and a driving means, and a control means for activating the clutch means. (2) The driving means includes a rack provided integrally with the seat cushion, and a rotation motor having an output shaft equipped with a pinion that meshes with the rack, and the motor is moved toward or away from the rack. 2. The rotary vehicle seat according to claim 1, wherein the rotary vehicle seat is movably provided so that the rack and pinion are connected and disconnected, and the movement of the motor is controlled by the clutch means. (3) The rotating motor is rotatable about the fulcrum of the motor housing, and the clutch means includes a spring member that urges the rotating motor to swing so that the output shaft equipped with a pinion approaches the rack. The rotary vehicle seat according to claim 2, further comprising a disengaging means for rotating the rotary motor so that the output shaft is separated from the rack against the spring force of the spring member. . (4) The seat cushion is equipped with a seating sensor for detecting the seating of an occupant, and the control means operates the clutch means to release the connection when the seating of the occupant is detected. Rotating vehicle seat as described in section.