JPS6212434A - Swivel type car seat - Google Patents

Abstract

PURPOSE:To improve practicality in a car seat, by devising a driving force transmission system of its driving device in structure, and making it selectable optionally to manual and automatic operations at each swivel stroke of boarding and alighting, in case of the car seat that swivels toward inner and outer directions of a car to facilitate the boarding or alighting of people to or from the car. CONSTITUTION:A seat cushion S of a driver's seat is rotatably supported on a fulcrum shaft 1 erected on a car floor F, and a bar member 2 is projectingly installed in a lower surface of the cushion S at a more eccentric position than the turning center. And, a sectorial engaging member 3 is set up in a lower part of a base plate 12 being slidable along a parallel rail 11 on the floor F, and the central part is coupled relatively rotatable with the fulcrum shaft 1. A long hole 31 of the same shape corresponding to a circular long hole 121 formed in the base plate 2 is formed in this engaging member 3, a tip end of the bar member 2 is inserted into this hole 31. And, with rotation of c.w. and c.c.w. directions of a motor 4, an engaging member 1 is rotated via engagement between a pinion 43 and a tooth profile 32 an outer circumference of the engaging member 3 whereby the seat cushion S is swiveled in both inner and outer directions of a car.

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 toward the entrance and exit when getting on and off the vehicle (Japanese Patent 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, the passenger must rotate the seat in and out of the vehicle each time they start getting on or off the vehicle, which is cumbersome. The problem is that they must coordinate their actions. SUMMARY OF THE INVENTION In view of these problems, an object of the present invention is to provide a rotatable vehicle seat that allows the user to arbitrarily select manual mode or automatic mode for each step of getting on and off the vehicle.

[Means for solving the problem] In Fig. 1, the seat cushion S is supported by a support shaft 1 installed upright on the vehicle floor, and rotates in the front direction of the vehicle (upper part of the figure) and the direction of the entrance/exit. It is movable (dashed line in the figure). A rod-shaped member 2 is provided on the lower surface of the seat cushion S eccentrically from the center of rotation. On the other hand, an engaging member 3 is provided on the vehicle floor F, and the engaging member 3 is formed with a pair of engaging surfaces 31a and 31b as shown in FIG. The engaging surfaces 31a and 31b face each other with the rod-shaped member 2 in between, at an interval equal to or longer than the locus of movement thereof, and are movable along the locus of movement.

The engagement member 3 is driven by the drive means 4, and as a result, the engagement surfaces 31a, 31b are moved forward and backward along the movement locus.

[Operations and Effects] The engaging surfaces 31a and 31b abut and engage with the rod-shaped member 2 during their movement. Therefore, the engaging surfaces 31a, 31
As b moves within the locus of movement of the rod-shaped member 2, the rod-shaped member 2 moves together with one of them, and the seat cushion S automatically rotates.

On the other hand, when both the engaging surfaces 31a and 31b are not within the above-mentioned movement locus, the rod-shaped member 2 can freely move forward and backward within the movement locus without coming into contact with them, and in this state, the seat cushion S cannot be moved manually. It can be rotated.

As described above, by appropriately selecting the moving positions of the engaging surfaces 31a and 31b, it is possible to arbitrarily select automatic manual rotation of the seat.

[Example 1] 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 is connected to the front of the vehicle (above the figure) and the entrance/exit. Rotate between directions (dashed line shown).

A rod-shaped member 2 protrudes from the lower surface of the seat cushion S at a position eccentric from the center of rotation, while an engaging member 3 having an engaging surface, which will be described later, is arranged on the floor F side.

The engaging member 3 is rotatably moved by a motor 4, which is connected to the control device 6 by a cable 61.

The control device 6 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, a door opening/closing angle sensor 54 provided in the door B1, etc. It is 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 ■-■ in FIG. 3, and FIG. 3 is a plan view of the seat viewed from below.

In the figure, reference numeral 11 denotes parallel rails provided on the vehicle floor F in the longitudinal direction of the vehicle (left-right direction in the figure), and a base plate 12 is slidably placed on these rails 11. The base plate 12 is moved and positioned to any position on the rail 11 by operating a lever 13 having a known structure.

A circular sliding plate 14 is provided on the upper surface of the flexible portion of the base plate 12, and a sliding plate 15 of the same shape is brought into contact with the movement plate 14 from above. The sliding plate 15 has a supporting shaft 1 protruding from the lower center surface thereof, which passes through the moving plate 14. Therefore, the sliding plate 15 is rotatable around the supporting shaft 1. A support plate 16 for supporting the seat cushion S is bonded and fixed to the sliding plate 15.

A rod-shaped member 2 protrudes from the lower surface of the sliding plate 15 at a position eccentrically forward from the center, and extends downward through the long holes 14L and 121 of the sliding plate 14 and the base plate 12. ing. The elongated holes 141 and 121 have the same shape and are formed in an arc shape centered on the support shaft 1 (Fig. 3), and their formation positions are closer to the outside of the vehicle (lower part in the figure) than the center line of the base plate 12. It's Toshide. Thus, the seat cushion S placed on the support plate 16 is rotatably movable in the front direction of the vehicle and in the direction of the entrance/exit while the rod-shaped member 2 is in contact with both ends of the elongated hole 121.

An engaging member 3 is arranged below the base plate 12 and parallel to it. The engaging member 3 is a fan-shaped plate, and its center portion is coupled to the support shaft 1 so as to be relatively rotatable. The above-mentioned engaging member 3
An elongated hole 31 having the same shape as the elongated hole 121 is formed on the plate surface of the plate, and the tip of the rod-shaped member 2 is inserted into the elongated hole 31. A tooth profile 32 is formed on the outer peripheral surface of the engaging portion vI3, and a pinion 43 meshes with the tooth profile 32. The pinion 43 is rotated forward and reverse by a motor 4 provided on the lower surface of the base plate 12 in a structure described later.

As the pinion 43 rotates, the engagement member 3
The engagement surfaces 31a, 3 at both ends of the elongated hole 31
1b abuts and engages the rod-shaped member 2 to move it along the elongated hole 121. Thereby, the seat cushion S automatically rotates inward and outward of the vehicle.

The pinion 43 is fixed to the rotating shaft of a worm wheel 42 (FIG. 2) provided in a gear box 44, and the worm wheel 42 meshes with the worm gear 41. The worm gear 41 is attached to the rotating shaft of the motor 4 that protrudes into the gear box 44 . The motor 4 is fixed to the base plate 12 by a stay 45.

Limit switches 17 are located at three locations on the bottom surface of the base plate 12.
．． 18 and 19 are provided, and each of the limit switches 17 to 19 is activated when the engaging member 3 is rotated to the inner position (as shown), the intermediate position, and the outer end. and,
When the engaging member 3 moves to the intermediate point, its elongated hole 31 completely aligns with the elongated hole 121 of the base plate 12. At this time, the limit switch 18 is activated by the striker portion 33 protruding from the center of the engagement member 3.

FIG. 4 shows the hardware configuration of the control device 6. As shown in FIG.

The device 6 includes an input interface 61, a microcomputer 62, an output interface 63, a current detection circuit 64 that detects the current value of the motor 4, and a door opening/closing angle detection circuit 65 that converts the output signal of the door opening/closing angle sensor 54 into impedance. has been done.

Hereinafter, an example of the operation of the vehicle seat will be explained with reference to the operation explanatory diagram of FIG. 5 and the program flowcharts of FIGS. 6 to 8.

When the seat cushion S is in the position shown in FIG. 5(1), in step 101 of FIG. 6, the ignition switch 53 is turned off to confirm that the vehicle is parked, 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). Seating sensor 5
1 is operating, the process advances to step 217 in FIG. 7, and if it is not operating, the process advances to step 201 in FIG.

When the occupant is seated, the motor 4 is rotated in the forward direction (step 217>, and the engagement member 3 is rotated to the intermediate point where the limit switch 18 is activated (steps 220, 212>). 5 (2). In this state, the elongated hole 31 and the elongated hole 121 are completely aligned, so that the rod-shaped member 2 can freely move within the elongated hole 121.

Thereby, the seat cushion S can be freely rotated manually, and the occupant twists his/her hips to rotate the cushion S toward the entrance/exit. This is shown in FIG. 5(3). When the passenger exits the vehicle and closes door B1, the steps are 213→214→
The process proceeds to step 216, and then proceeds to step 301 in FIG.

In step 301, the motor 4 is reversely rotated to rotate the engaging member 3 to the inner end where the limit switch 17 is activated (steps 304 and 305). In this process, the engagement surface 31b of the engagement member 3 comes into contact with the rod-shaped member 2, and as the engagement member 3 moves, the seat cushion S also rotates inward, as shown in FIG. Return to the original position in 1).

In addition, each of the above steps 218.219.302.303
Now, detect the current value Im when the motor rotates, and this is the allowable value ■. If the value exceeds 1, the motor 4 is stopped as a motor overload (step 221.307). After the motor is stopped, the motor 4 is rotated again after confirming that the reset switch 52 has been pressed (step 301).

In step 104 of FIG. 6 above, if the occupant is not seated, that is, if the occupant is about to board the vehicle, the motor 4 is rotated forward in step 201 of FIG. 7, and the limit switch 19 is activated. The engaging member 3 is rotated to the outer end (steps 206 and 207).
). During this rotation, the engagement surface 31a of the engagement member 3 comes into contact with the rod-shaped member 2, and as the engagement member 3 moves, the seat cushion S rotates outward, toward the entrance. Head to This is shown in FIG. 5 (4). Motor 4 is step 20
After stopping at step 7, start reverse rotation immediately in step 20.
8) Return the engaging member 3 to the intermediate point as shown in FIG. 5(3) (steps 211 and 212).

In this state, the elongated holes 31 and 121 are completely aligned again, and the seat cushion S can be freely rotated manually. When the occupant sits down and twists his or her hips, the seat cushion S rotates inward of the vehicle and returns to its current position (fifth
Figure (2)). Here, when the boarding door B1 is closed, the steps progress from 213 to 214 to 215, and when it is detected that the door opening/closing angle θd has become equal to or less than the angle θO when the door is closed, step 8
Proceed to step 301 in the figure. In step 301 and subsequent steps, the engaging member 3 is rotated to the inner end as described above (FIG. 5 (1)), and the rod-like member 2 is moved into the elongated hole 1 by the engaging surface 31b.
1, the seat cushion S is in a locked state.

Note that in steps 204 and 205 in FIG. 7 above,
When the door opening/closing angle θd becomes less than 61, it is determined that the occupant has stopped riding, and the program proceeds to the program shown in FIG. 8, where the seat cushion S is returned to its original position. Further, in steps 202, 203, 209, and 210, overload of the motor 4 is detected.

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 is closed after getting off the vehicle, the seat cushion S automatically rotates toward the vehicle and returns to its original position. Return to When getting on and off the vehicle, the seat cushion S can be freely rotated manually and 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 at his or her own pace.

In the above embodiment, step 104 in FIG. 6 is deleted, and steps 20 ``1~'' in FIG. 7 are executed regardless of whether or not the occupant is seated.
If 212 is set to be executed, the seat will automatically rotate when the passenger exits the vehicle. Also, in step 214,
When the seating sensor 51 changes from OFF to ON, the eighth
If the flowchart shown in the figure is set to be executed, the seat will automatically rotate even when a passenger is in the vehicle. If a pattern selection switch is provided so that a flowchart can be selected, the passenger can arbitrarily set the seat rotation process to be automatic.

[Embodiment 2] In FIGS. 9 and 10, the engagement member 3 provided on the lower surface of the base plate 12 has a long plate shape, and the plate 12
It is fitted onto a rail 36 disposed in the width direction so as to move along the rail 36.

A tooth profile 32 is formed on one side of the engaging member 3 and engages with a pinion 43. The side surface of the engagement member 3 has two parts protruding laterally, and these protrusions 34
．． The opposing surfaces of 35 are engaging surfaces 34a and 35a.

The rod-shaped member 2 passing through the elongated hole 121 has the above-mentioned engagement surface 34a,
It is located between 358 and 358. Note that the engaging surfaces 34a and 35a
The opposing interval is longer than the locus of movement of the rod-shaped member 2 moving within the elongated hole 121.

When the engagement member 3 is in the illustrated position, the rod-shaped member 2 is in the engagement surface 35.
a is pressed against one end of the elongated hole 121, and the seat cushion S faces toward the front of the vehicle and is in a locked state. At this time, the limit switch 17 is activated by the protrusion 34.

Rotate the pinion 43 to move the engaging member 3 to the protrusion 3
When the rod-shaped member 2 is moved downward in the figure until it contacts the limit switch 18, the rod-shaped member 2 becomes freely movable within the elongated hole 121. However, in this state, the seat cushion S
can be manually rotated as desired.

Roughly, when the engaging member 3 is moved downward in the figure until the protrusion 35 comes into contact with the limit switch 19, the rod-shaped member 2 is now pressed against the other end of the elongated hole 121 by the engaging surface 34a. The seat cushion S faces toward the entrance and exits and is in a locked state. The structure of this embodiment also has the same effects as the first embodiment.

In each of the above embodiments, the elongated hole 1 into which the rod-shaped member 2 is inserted is
Although the rotation range of the seat cushion S is regulated by 21, the rotation range of the seat cushion S is not limited to this, and other stoppers may be provided.

The drive mechanism for the rotary seat is not limited to those of the previous embodiments, and a hydraulic, pneumatic, or other drive mechanism may be used.

The 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 potentiometer. Further, the door opening/closing angle may be detected by providing a sensor in the door hinge part instead of the door checking part, or by measuring the position of the door using ultrasonic waves or the like.

Alternatively, 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 whether the vehicle has stopped.

In the above embodiment, 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 is also possible to use a configuration in which the seat cushion S is returned to the front direction based on this signal.

To detect the rotational position of the engagement member 3, a pulse generator or a potentiometer may be provided on the engagement member 3 or the motor 4 instead of the limit switch.

In each of the above embodiments, the rod-shaped member 2 is attached to the base plate 1.
2 and the engaging member 3 is provided on the support plate 16, similar effects can be obtained.

[Brief explanation of drawings]

1 to 8 show a first embodiment of the present invention, FIG. 1 is a plan view of a vehicle driver's seat, FIG. 2 is a partially sectional side view of the seat, and the cross section is shown in FIG. - Figure 3 is a plan view of the seat seen from below; Figure 4 is a block diagram showing the hardware configuration of the control device; Figure 5 is a schematic plan view showing the operation of the seat; Figure 6 8 to 8 are computer program flowcharts, FIGS. 9 and 10 show a second embodiment of the present invention, FIG. 9 is a partially sectional side view of the seat, and FIG. 10 is a view of the seat from below. FIG. 1... Support shaft 2... Rod-shaped member 3... Engaging member 31... Elongated hole 31 a, 31 b, 34 a, 35 a... - Engagement surface S...Seat cushion F...Vehicle floor Fig. 1 Fig. 3 Fig. 5 Fig. 5 Fig. 6 Fig. 10

Claims (3)

[Claims] (1) A seat cushion that is rotatably supported in the front direction of the vehicle and in the direction of the entrance/exit on a support shaft installed on the vehicle floor, and the center of rotation of the seat cushion is located on the underside of the seat cushion or on the vehicle floor. A rod-shaped member provided more eccentrically and movable along a locus of relative movement of the rod-shaped member with respect to the seat cushion or the vehicle floor, and facing each other with the rod-shaped member sandwiched therebetween at an interval longer than the locus of movement, and the rod-shaped member A rotary vehicle seat comprising: a pair of engaging surfaces provided on a vehicle floor or a lower surface of a seat cushion that abut and engage; and a drive means for moving the engaging surfaces forward and backward along the movement locus. . (2) The pair of engagement surfaces are formed at both ends of an arc-shaped elongated hole along the locus of movement, and the tip of the rod-shaped member is inserted through the elongated hole, and provided on the vehicle floor or the lower surface of the seat cushion. 2. The rotary vehicle seat according to claim 1, wherein the engaging member in which the elongated hole is formed is rotated about the arc center of the elongated hole by the driving means. (3) The pair of engagement surfaces are formed parallel to each other so as to cross the locus of movement, and the engagement member provided on the vehicle floor or the lower surface of the seat cushion to form the engagement surfaces is moved by the drive means. A rotary vehicle seat according to claim 1, wherein the rotary vehicle seat is configured to move linearly in a tangential direction of a locus.