CN1935559B - Device for vehicle seat - Google Patents

Abstract

Device for vehicle seat is provided. When a seat back (4) in a forwardly folded state is raised to a predetermined raised state by activating an electric motor (33) by turning on a switch, the electric motor is immediately stopped even if the switch is still turned on, and the seat back (4) is retained in the raised state. There are provided a locking member which operates to retain the seat back in the raised state when the seat back is in the predetermined raised state and a lever which turns in association with the operation of the locking member. The lever turns on another switch to open a drive circuit for the electric motor.

Description

Seat device for vehicle

technical field

The present invention relates to a vehicle seat device.

Background technique

Regarding the cab structure of vehicles such as automobiles, as described in Japanese Patent Laid-Open No. 2001-239870, the seat back of the last row of seats arranged in front and rear is used to separate the compartment and the cargo compartment at the rear of the compartment. , and the seat back is folded forward and overlapped with the seat cushion, and objects can be placed on the back of the seat back, that is, the loading compartment is partially enlarged to the compartment, etc. It is generally known.

In addition, regarding the seat of the vehicle, as described in the Japanese Patent Publication No. 2005-41406, the method that the seat back is folded toward the seat cushion and the seat back is returned to the original position by the electric motor has been proposed. known. In this proposal, the folding and unfolding (returning) of the seat back are each detected by a limit switch to stop the electric motor. Furthermore, as described in Japanese Patent Publication No. 2004-249962, when the seat back is folded on the seat cushion, the entire seat can be stored in the storage part of the seat back, and its storage and recovery are performed by the user. It is also known that an electric motor is used, and an operation switch that resets the storage release operation is provided behind the (rear) seat (cargo compartment).

However, in the case of returning the seat back from the forward-folded state to stand up, using the electric motor as described above can reduce the burden on the user. In this case, it is considered that the electric motor operates only when the operation switch is pressed by providing an automatic recovery type (momentary trye) operation switch in the cargo compartment or the like at the rear of the seat back.

However, the use of the automatic return type operation switch means that the position to which the seat back is to be returned is determined by the user. For this reason, even if it is judged that the seating comfort of the seat is sufficient at the angle of this position, the electric motor is stopped to make the seat back into the seating state, but it is easy to happen that the seating comfort state is not actually reached. For example, the back of the seat is too vertical to make the ride uncomfortable, or it is too tilted backward to make the ride uncomfortable, and the space of the cargo compartment behind the seat back is reduced.

In contrast, it is considered to provide a mark for stopping the seat back at a predetermined return position. Use this mark to confirm the return position of the seat back and close the operation. However, even in this case, the hand is released from the switch too early or too late to stop the seat back at the desired position.

In addition, it is also conceivable to provide a stopper that stops the seat back at a predetermined position. That is, when the seat back is raised by the operation of the electric motor, if it touches the limiter, an overcurrent will flow through the electric motor. Detecting this overcurrent cuts off the electric motor current. However, if a large force is applied to the seat back or the limiter from the point where the seat back touches the limiter until the electric motor stops, the seat device is easily damaged. For this reason, it is also conceivable to reinforce part of the limiter or the seat back, but such reinforcement increases the weight of the vehicle body.

On the other hand, it is conceivable not only to raise the seat back from the forward tilted state, but also to tilt forward from the erected state by the electric motor. However, if you do that, regardless of whether there are objects on the seat, if you operate the electric motor inadvertently, the seat back will lean forward. Also, in the case of tilting the seat back forward, it is necessary to operate the electric motor. In addition, it takes more time than expected to start the motor from this switch operation point, tilt the seat back forward, and stop the electric motor, so it is disadvantageous in quickly performing the forward tilt. Also, if an electric motor is also used for the forward tilt of the seat back, the power consumption of the car will increase.

For this reason, it can also be considered that the erection of the seat back is carried out by an electric motor, and its forward tilt adopts a rebounder such as a spring. As long as the seat back lock is manually released, the seat back can immediately become a forward tilted state.

However, when the chair back is tilted forward, there will be a problem that this motor becomes a resistance because the electric motor is fixed on the back of the chair or the car body (or the seat cushion) through transmissions such as gears for erecting. That is, when the seat back is tilted forward, it is necessary to rotate the output shaft of the electric motor in the opposite direction to when the seat back is erected, and this motor acts as resistance. For this reason, the seat back will stop when it is tilted halfway forward by the above-mentioned rebounder, and the user cannot reach the predetermined position unless the user pushes from above the seat back. Furthermore, when the base end of the seat back rubs against the rear end of the seat pad when the seat back is tilted forward, the rubbed seat back becomes a frictional resistance when the chair back is tilted forward. In this case, not only the resistance of the above-mentioned electric motor but also this frictional resistance is added, so it is more difficult to tilt the seat back forward to a predetermined position with a rebounder such as a spring.

(The problem to be solved by the invention)

Here, in the present invention, when the seat back is erected, the erection operation is performed while confirming safety, and it is also possible to make it reach a suitable erection position as a subject.

Furthermore, the present invention is an object of the present invention to perform forward tilting and erecting of the seat back safely and with good operability in a vehicle seat device including an electric motor for erecting the seat back.

Contents of the invention

In the present invention, while the electric motor is used for erecting the chair back, in order to improve the operability and safety of erecting the chair back, an automatic restoration type operation switch and a limiter for forcibly stopping the erecting action of the chair back are combined. Best of all, the forward tilt of the chair back is performed manually, and the electric motor does not become a resistance to its forward tilt.

(method to solve the problem)

The first invention of the present application is to include a seat back that can realize a predetermined upright state and a forward tilted state that can be tilted or folded toward the side of the seat cushion around the rear end portion of the seat cushion, and the vehicle A seating arrangement disposed adjacent to the load compartment on the vehicle front side of the load compartment, comprising:

an electric motor that rotates the above-mentioned seat back centered on the vicinity of the rear end portion of the above-mentioned seat cushion, and

A drive circuit for operating the above-mentioned electric motor, additionally

The above drive circuit includes:

The operation switch is an operation switch that automatically returns to OFF, and it is provided in the cargo compartment away from the rear portion of the vehicle seat, and by turning it on, the seat back can be erected from the forward tilted state. The aforementioned electric motor starts,

The above-mentioned seat back is erected to the above-mentioned upright state by the above-mentioned operation switch, and the seat back stops at the predetermined position regardless of whether the on-operation is continued, and the forced disconnector that cuts off the power supply to the above-mentioned electric motor by the above-mentioned drive circuit,

a support mechanism for supporting the chair back in the upright state,

an operating part that releases the support of the seat back from the support mechanism, and

The first rebounder, when the support of the support mechanism to the chair back is released, the chair back rebounds to make the chair back rotate to the forward falling state.

Therefore, when the user raises the seat back from the forward-folded state, the user only needs to turn on and operate the automatic return type operation switch that leaves the vehicle seat position. Therefore, no physical strength is required, and the seat back is erected from the forward-down state while confirming safety. That is, when an object is sandwiched between the seat back and the wall surface of the vehicle body during the erection of the seat back by the electric motor, or the object in the cargo compartment may be damaged, it is only necessary to release the operation switch. As a result, the operation switch immediately cuts off the electric motor and stops it, so that the seat back can be stopped in the middle of erection without wall failure.

And when the seat back is erected by operating the switch while confirming safety, if the seat back becomes a predetermined erect state, even if the operation switch is continued to be pressed, the drive circuit is cut off from the power supply to the electric motor by the forced disconnector. As a result, no torque is output from the electric motor, and the seat back is stopped at a predetermined upright position. Therefore, it is no longer likely that the seat back will be closer to the vertical state than intended, or the seat back will be tilted too far backward, thereby avoiding the reduction of riding comfort. Also, the load space behind the back of the seat is prevented from becoming too small. Furthermore, damage to the vehicle seat due to the torque of the electric motor is avoided.

The second invention is in the first invention,

It is characterized in that the above-mentioned chair back can also be in a state of inclination to the rear or backward than the above-mentioned upright state.

The third invention is in the first invention, including:

the first coupling member provided on the above-mentioned chair back,

a second coupling member that is provided on the seat cushion or the vehicle body to support the posture of the seat back in conjunction with the first coupling member; and

When the above-mentioned chair back is in the above-mentioned upright state or the above-mentioned rear-down state, the combination of the first coupling member and the second coupling member becomes the first form, and when the above-mentioned seat back is in the above-mentioned forward-down state, the combination of the above-mentioned two coupling members is released. Binding/disengaging structure of the second form, additionally

The above-mentioned forced disconnector is linked to the action of the above-mentioned coupling/disengagement structure. When the coupling/disconnection structure is in the above-mentioned first mode, the power supply from the above-mentioned driving circuit to the above-mentioned electric motor is cut off, and the coupling/disconnection structure becomes the above-mentioned first configuration. The second aspect is characterized by an interlocking switch that is turned on by the drive circuit to the electric motor.

Therefore, when the connection/release structure is in the second form, the connection between the first connection member and the second connection member is released, so that the seat back can be erected. In addition, in this second form, the interlock switch is turned on to allow the electric motor to be energized from the drive circuit, so the electric motor can be operated by operating the operation switch, and the seat back in the forward-folded state can be erected. That is, the same as the first invention, the user can erect the seat back from the forward-down state while confirming safety without using physical strength by turning on the operation switch.

And, when the seat back is moved from the forward-falling state to the predetermined upright position, the coupling/disengagement structure becomes the first form in which the first coupling member and the second coupling member are coupled, and the interlocking switch becomes an off state to cut off the transmission from the driving circuit to the electric motor. power on. Therefore, even if the ON operation of the operation switch is continued, torque is no longer output from the electric motor due to the above-mentioned cut-off of energization. On the other hand, as described above, the seat back is surely supported at the predetermined upright position by the coupling of the first coupling member and the second coupling member. Therefore, like the first invention, the seat back does not appear to be more vertical than a predetermined position or to fall too far backward.

According to a fourth invention, in the third invention, the above-mentioned combination/release structure includes:

An actuating member that moves between an actuating position for contacting one of the above-mentioned first coupling member and the second coupling member to engage the coupling member with the other coupling member, and a release position for releasing the coupling,

a second rebounder for rebounding said action member to said action position, and

The operation member is connected to the operation member by an operation transmission member and is arranged at a position farther from the operation member, and the operation member resists the rebound force in order to release the connection between the first connection member and the second connection member. Move to the release position, additionally

The above-mentioned positive disconnector is characterized in that it is in an off state when the operation member moves to the above-mentioned operation position directly, and is in an on state when the operation member moves to the release position.

That is, when the first coupling member and the second coupling member are coupled and released, the movement to the operating position and the releasing position of the operating member is directly reflected. Then, the operation-linked switch directly receiving the operation member is changed into an OFF state for cutting off energization to the electric motor and an ON state for allowing energization.

Therefore, when the interlock switch is turned on/off, it can be directly reflected in the coupling and disengagement of the first coupling member and the second coupling member. For this reason, when the chair back of the operation switch is erected to a prescribed erect state, the first coupling part and the second coupling part are combined, and when the chair back supports this erect state, the interlocking switch does become a cut-off state and cuts off direction simultaneously. Energization of the electric motor. Therefore, regardless of whether the seat back is supported in the predetermined upright state, it is possible to avoid overloading the seat device due to the electric motor supporting the operating state. Or, it can be avoided that the electric motor is stopped before the seat back is erected to the predetermined erected state, so that the seat back cannot be erected to the predetermined erected state, and the chair back cannot be reliably supported by the above-mentioned two coupling members.

The fifth invention, in the fourth invention, is based on

The above-mentioned first coupling member is arranged concentrically with the rotation center of the seat back so that it rotates together with the above-mentioned seat back,

The action member is in contact with the second coupling member,

It is characteristic that the joint position of the second joint member relative to the first joint member can be selectively changed by rotating the first joint member together with the seat back, and the reclining angle of the seat back can be changed.

Therefore, when the operation member is moved to the release position by the operation of the release operation member, the connection between the first connection member and the second connection member is released, so that the seat back can be rotated forward and backward. And, if the operation of the release operation member is released, the action member moves to the action position through the rebounder and the above-mentioned two connecting members are in a connected state. Therefore, by appropriately changing the connecting position of the second connecting member relative to the first connecting member, the seat back can be changed. the back tilt angle. That is, the action part of the on/off interlocking switch constitutes the adjustable mechanism of the seat back together with the above-mentioned two coupling parts. According to the present invention, the energization control of the electric motor can be carried out by utilizing this adjustable mechanism, and the structure of the seat device just changes. Keep it simple.

The sixth invention, in the second invention, further includes

The above-mentioned electric motor is installed on one of the above-mentioned seat pad and the above-mentioned seat back, or is installed on one of the vehicle body and the above-mentioned seat back. Center rotate the back of the chair so that it stands upright,

Furthermore, when the seat back is brought into the forward tilted state, it is characterized by a transmission canceller that does not transmit reverse torque from the seat back to the electric motor.

Therefore, the change from the forward tilted state of the seat back to the erected state can be performed by the electric motor provided on one of the seat cushion or the vehicle body and the seat back, thereby reducing the burden on the user. On the other hand, when the chair back is supported by the supporting mechanism in an upright state, the supporting state of the supporting mechanism is released by the operating member, and the chair back is rotated in the forward tilting direction by the resilience force of the rebounder. At this time, since the reverse torque from the seat back to the electric motor can not be transmitted by the transmission canceller, it is possible to prevent the electric motor from being a resistance when the seat back is tilted forward. That is, when the seat back is tilted forward, it is not necessary to rotate the output shaft of the electric motor in the opposite direction to that when the seat back is erected. Therefore, the chair back can only be made into the desired forward-falling state by the rebound force of the above-mentioned rebounder, or the user can add a force slightly on the rebound force.

The seventh invention, in the above sixth invention, further includes

The drive gear that is provided on the above-mentioned one of the components and rotates with the output shaft of the above-mentioned electric motor,

a driven gear that is coaxially arranged with the rotation center of the above-mentioned chair back and rotates freely, and meshes with the above-mentioned driving gear,

It is provided on the above-mentioned other part, so that the above-mentioned seat back can be erected by the rotation of the driving gear by the above-mentioned electric motor, and the separator is combined so that the above-mentioned driven gear is prevented from rotating relative to the above-mentioned other part, and in addition

The transmission canceler is characterized in that the coupling-separator cancels the prevention of the rotation of the driven gear.

Therefore, if the above-mentioned electric motor is driven in a state where the relative rotation of the above-mentioned driven gear is prevented by the coupling separator, the torque of the electric motor is received by (transmitted to) the driven gear through the driving gear, and the seat back is erected.

On the other hand, when the seat back is folded forward, if the above-mentioned rotation prevention is released by the transmission canceller through the coupling separator, the driven gear can freely rotate with respect to the above-mentioned other member. As a result, the electric motor is prevented from being a resistance when the chair back is tilted forward.

That is, in the case where the above-mentioned one of the above-mentioned electric motors and drive gears is a seat back, and the other of the above-mentioned parts is a seat cushion or a vehicle body, the situation is as follows. First, by the release of the above-mentioned coupling separator, the driven gear becomes free to rotate relative to the seat cushion or the vehicle body, which is another component. Therefore, when the chair back is tilted forward, the driven gear does not rotate relative to the chair back, but can rotate in the direction in which the chair back is tilted forward while being integrated with the chair back. For this reason, it is no longer necessary to rotate the driving gear meshed with the driven gear when the chair back is tilted forward, and the electric motor is prevented from being the resistance when the chair back is tilted forward.

In addition, when the above-mentioned one member provided with the above-mentioned electric motor and the driving gear is a seat cushion or a vehicle body, and the above-mentioned other member is a seat back, it becomes the following situation. First, by the release of the above-mentioned combined separator, the driven gear is free to rotate relative to the seat back of the other component. Therefore, it rotates relative to the driven gear when the chair back is tilted forward. That is, the driven gear does not rotate when the chair back is tilted forward, so the driving gear meshed with the driven gear does not rotate either, which prevents the electric motor from becoming a resistance when the chair back tilts forward.

The eighth invention, in the seventh invention, is based on

The coupling-separator includes: a coupling gear integrally rotating with the driven gear, a universal joint member coupled to the coupling gear, and a third springback mechanism for rebounding the universal joint component toward the coupling direction of the coupling gear. device, additionally

On the coupling gear, a plurality of coupling teeth for preventing the rotation of the universal joint member relative to the driven gear is set in a predetermined forward-falling state in which the seat back is tilted or down on one side of the seat cushion from the upright state. It is characterized in that the intervals above the rotational forward tilt angle are set in the circumferential direction.

Therefore, when the connection of the coupling gear of the universal joint part is released and the seat back falls forward, even if the universal joint part rebounds in the direction of connection by the rebounder, until the seat back reaches a predetermined forward falling state, The universal joint part is not engaged with the coupling teeth. Therefore, it is advantageous in preventing the electric motor from being a resistance to the forward tilting of the chair back.

The ninth invention, in the eighth invention, is based on

Between the teeth of the coupling gear adjacent in the circumferential direction of the coupling gear, the universal joint member is in contact with each other, and a protrusion is formed that causes the driven gear to rotate relative to the other member by receiving the resilience force of the third rebounder. It is characterized by the surface.

As mentioned above, when the combination of the coupling teeth of the universal joint part is released and the seat back falls forward, even if the universal joint part rebounds in the coupling direction by the rebounder and reaches the prescribed forward falling state, the universal joint part will not fall forward. The joint part is not combined with the coupling teeth. However, since the universal joint member is in a state of being in contact with the coupled gear due to the above-mentioned resilience force, the frictional force of this contact prevents the free rotation of the above-mentioned driven gear. This creates the force of the forward tilt of the chair back to rotate the drive gear, which means that the electric motor becomes a resistance, which is unfavorable for the forward tilt of the chair back.

Here, in the present invention, the convex surface of the universal joint member contacted by the resilience force of the rebounder is formed between the teeth of the adjacent coupling teeth in the circumferential direction of the coupling gear, and the rebound force of the rebounder is utilized. The resilient force positively rotates the driven gear relative to the other member. Therefore, it is possible to avoid the force of rotating the drive gear when the chair back falls forward, which is beneficial to the smooth forward fall of the chair back.

The tenth invention, in the sixth invention, is based on

The transmission canceler is characterized in that it functions to prevent transmission of reverse torque from the seat back to the electric motor in conjunction with release of the operation of the operation member supported by the support mechanism on the seat back.

Therefore, when the seat back is to be tilted forward, the support of the seat back by the supporting mechanism is released, and the transfer release device functions to be in a state where the reverse torque is not transmitted from the seat back to the above-mentioned electric motor, so it is not necessary to perform the above-mentioned operation separately. By transmitting the release operation, the forward tilting operation of the seat back becomes easy.

The eleventh invention, in the sixth invention, is based on

The above-mentioned seat cushion lowers the position as the seat back is tilted forward, and rises as the seat back is erected, and is coupled to the vehicle body to which the seat back is connected so as to be able to move up and down freely.

In this way, when the seat cushion is lowered along with the forward falling of the seat back, in order to lower the seat cushion, for example, the sliding resistance of the seat cushion of the seat adjacent to the seat, the sliding resistance with the inner wall of the compartment, and the sliding resistance with the seat back The sliding resistance of the link increases the force required to tilt the seat back forward. Even in such a case, as long as according to the present invention, the electric motor as described above can be avoided from being a resistance to the forward tilting of the chair back, it is therefore beneficial to smooth forward tilting of the chair back.

The twelfth invention, in the first invention,

The above-mentioned electric motor is installed on one of the above-mentioned seat cushion and the above-mentioned seat back, or is installed on one of the vehicle body and the above-mentioned seat back, and transmits torque to the other member, so that the seat back in the above-mentioned forward-folded state moves with the above-mentioned Near the rear end of the seat cushion is rotated and erected around the center until the above-mentioned erected state.

Therefore, the forward inclination of the seat back is not performed by the electric motor, but by the rebound force of the rebounder. Therefore, it is assumed that the forward inclination of the seat back is carried out even if an object is placed on the seat (by the operator. parts unsupported by the support mechanism) and do not exert great force on the object. That is, if an object is sandwiched between the seat cushion and the seat back when the seat back is tilted forward by the electric motor, it will move toward the object due to the driving force of the electric motor. However, according to the present invention, such a problem can be avoided. Still, it is considered to detect an overcurrent of the electric motor to stop the electric motor, but an overcurrent detector must be provided separately for this purpose, and this point is also simplified in the present invention.

On the other hand, since the erection of the seat back from the forward-folded state is performed by the electric motor, the driver's labor is reduced. In addition, the operation switch for erecting the seat back is set at a predetermined position in the car away from the seat back, so the driver does not need to move to the position of the seat back for erecting the seat back, and it can be performed together with other operations. The upright operation of the chair back. For example, if the operation switch is installed in the load compartment, the rear door of the vehicle can be opened and the necessary seat back can be erected while the load is arranged.

The thirteenth invention, in the twelfth invention, is based on

When the above-mentioned chair back is released from the support of the above-mentioned support mechanism, the back of the chair can be pushed to the rear side by resisting the rebound force of the above-mentioned rebounder, and can also be tilted or fallen more backward than the above-mentioned upright state,

The above-mentioned support mechanism is characterized in that it can support the above-mentioned chair back in the above-mentioned upright state, and can also support the above-mentioned backward state.

That is, in the case where the electric motor is used for erecting the seat back as described above, it is also conceivable to use the electric motor for reclining the seat back. However, since the erection speed of the seat back is desired to be as fast as possible, if the same electric motor is used to tilt the seat back backward, the tilting speed is also fast, and it is difficult to fine-tune the backward tilting angle. For this reason, in the present invention, if the seat back support of the support mechanism is released, the driver can push down the seat back backwards, and then be supported by the support mechanism again at a suitable angle that the seat back is toppled backward, that is, The tilt angle can be manually adjusted by the driver.

The fourteenth invention, in the thirteenth invention, is based on

The electric motor is characterized in that the time required for the seat back to be erected from the forward tilted state folded on the seat cushion to the erected state is set to seven seconds or less.

Therefore, when the chair back can be quickly erected from the forward-down state by the electric motor, the driver manually adjusts its tilting angle when the chair back is tilted backward.

The fifteenth invention, in the twelfth invention, is based on

The above-mentioned first rebounder and the above-mentioned electric motor are set so that the time for moving the above-mentioned chair back from the above-mentioned upright state to the forward-down state of the above-mentioned seat cushion is shorter than that from the above-mentioned forward-leaning state on the seat cushion to the above-mentioned upright state. It is characterized by a short time from state transition.

That is, when the seat back is tilted forward by the rebounder, the safety is higher as described above, compared with the case where the electric motor is used. On this basis, in the present invention, the time required for the chair back to fall forward is shorter than the time required for erecting. Therefore, the seat back can be quickly turned from the upright state to the forward tilted state. On the other hand, when the seat back is erected from the forward tilted state, the seat back can be raised while confirming the safety of the back of the seat back.

A sixteenth invention, in the second invention,

The above-mentioned supporting mechanism also supports the above-mentioned chair back in the above-mentioned rear lodging state, and in addition

The above-mentioned electric motor is installed on one of the above-mentioned seat cushion and the above-mentioned seat back, or is installed on one of the vehicle body and the above-mentioned seat back, and transmits torque to the other member, so that the seat back in the above-mentioned forward-folded state moves with the above-mentioned Near the rear end of the seat cushion is rotated and erected around the center until the above-mentioned erected state,

The above-mentioned chair back is characterized in that it can be tilted backward from the upright state against the rebound force of the rebounder when the support of the above-mentioned upright state by the above-mentioned support mechanism is released.

Therefore, the chair back can be quickly erected from the forward-down state to the erected state by the electric motor. Also have, erect the back of the chair, remove the support driver of the support mechanism and push back the seat back, and then be supported by the support mechanism at a suitable rear tilting angle position. That is, the rear tilt angle can be manually adjusted by the driver.

The seventeenth invention, in the sixteenth invention, includes

The transmission canceler for canceling the transmission of the torque of the electric motor to the other member when the seat back is in the rearward lying state is characterized by a feature.

Therefore, for example, when the driver is sitting, even if he accidentally misoperates the electric motor, if the seat back is in the backward state, the torque of the electric motor is restrained from being transmitted to another component, and the seat back is prevented from falling backward. , the breakage of the objects in the cargo compartment, and the tension brought to the passengers are all eliminated.

Description of drawings

FIG. 1 is a side view showing part of a rear portion of a vehicle including a seat according to the present invention.

Fig. 2 is a view similar to Fig. 1 in a state in which the back of the rear seat is tilted forward.

Fig. 3 is a perspective view showing the frame structure of the rear seat.

Fig. 4 is a drive circuit diagram of the electric motor for erecting the seat back of the above-mentioned rear seat.

Fig. 5 is a perspective view showing a hinge portion of the rear seat.

Fig. 6 is a front view showing the relationship between the hinge portion supporting the seat back in an upright state and an interlocking switch.

Fig. 7 is the same view as Fig. 6 in which the support of the seat back is released.

Fig. 8 is a side view showing the relationship between the hinge handle and the interlocking switch in the upright state and the forward-down state of the seat back.

FIG. 9 is a relationship diagram similar to FIG. 8 showing the upright state and the forward-folded state of the seat back.

Fig. 10 is a perspective view showing a state in which the erection mechanism of the seat back is erected on the seat back.

Fig. 11 is a side view showing a state in which the erection mechanism is erected on the seat back.

Fig. 12 is a side view showing a state in which the erection mechanism is pulled by the operation knob in the erected state of the seat back.

Fig. 13 is a side view showing the erection mechanism part in the middle of the forward tilt of the seat back.

Fig. 14 is a side view of the above-mentioned erecting mechanism in a state in which the seat back is tilted forward.

Detailed ways

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the rear of a vehicle (automobile) having three rows of seats arranged in the front-rear direction. That is, the figure shows the middle row of seats 1 and the rear row of seats 2, and omits the first row of seats having the driver's seat. In a state where the seatback 4 of the rear seat 2 is erected, the rear of the seatback 4 forms a cargo compartment 5 . That is, the compartment is divided into a front passenger compartment and a rear cargo compartment 5 by the upright seat back 4 . The work of organizing the loaded goods can be carried out by opening the rear door on the back of the vehicle. Also, a side door is provided on the side of the center seat 1 (the outer side in the vehicle width direction), and the center seat 1 and the rear seat 2 can be taken in and out of the vehicle by opening the side door.

The middle row of seats 1 is fixed on the bottom surface, and the seat back 12 at the rear end of the seat cushion 11 is set in a form that can be adjusted.

The rear seat 2 also includes a seat cushion 3 and a seat back 4 , but is different in configuration from the middle seat 1 .

That is, the front portion of the seat cushion 3 is freely connected on the base plate by the connecting rod 13 for lifting. On the other hand, the lower end of the seat back 4 is rotatably supported by support pins 15 on corner braces 14 fixed to the floor. Furthermore, the rear end of the seat cushion 3 and the lower end of the seat back 4 are connected by support pins 16 . Any one of these support pins 15, 16 and the support pins at both ends of the connecting rod 13 is horizontally arranged along the vehicle width direction.

Thus, if the seat back 4 is tilted forward, as shown in Figure 2, the seat cushion 3 is pushed forward by the seat back 4, and the connecting rod 13 falls forward so that the height of the seat cushion 3 is lowered to become the seat back on it. 4 overlapping forward states. If the seat back 4 is erected, the seat cushion 3 is pulled by the seat back 4, the connecting rod 13 is erected, and the position is raised (refer to FIG. 1 ).

In this way, the seat back 4 of the rear seat 2 is supported by the support mechanism described later in a predetermined upright state (for example, a state inclined backward by 15 to 25 degrees from the vertical line), and can be rebounded by the forward tilt described later. The device can be tilted forward, and it can be erected to the above-mentioned specified erected state from the front-down state by the electric motor described later, and it can also be properly toppled backwards. In addition, on the front side and the rear side of the seat back 4, there are provided operation buttons 7, 7 for releasing the operation member supported by the support mechanism and the like. Furthermore, the side wall of the load compartment 5 is provided with an automatic recovery operation switch 8 that switches on the above-mentioned electric motor and rebounds to the side that is always off.

The bottom plate of the load compartment 5 forms a recessed spare tire accommodation recess 17 downwards, and the spare tire 18 can be accommodated in the accommodation recess 17. The front portion of this storage recess 17 is covered by the rear portion of the rear seat 2 , and the rear portion of the storage recess 17 is covered by the auxiliary storage box 19 . Small items such as tools can be placed in the auxiliary storage compartment 19. When the seat back 4 of the rear seat 2 is tilted forward onto the seat cushion 3, as shown in FIG. In this case, objects can also be placed on the back of the seat back 4 that has fallen down, and the load compartment 5 becomes a state expanded to the compartment side. That is, the vehicle compartment is divided into a passenger compartment on the front side and a cargo compartment 5 on the rear side by the seat backs 12 of the middle row seats 1 .

<Structure of the rear seat>

FIG. 3 shows the frame structure of the rear seat 2 and the mounting structure to the vehicle body floor. The vehicle includes two independent rear seats 2 on the left and right, respectively having the functions of the present invention described later, so the right side seat seen from the front is mainly described in detail below. In the same figure, 21 is the frame of the seat cushion 3, on which springs 22 and the like are provided. The front portion of the cushion frame 21 is connected to the front and rear frames 23 extended in the front and rear direction and fixed to the floor by the link 13 . A seat cushion body (not shown) is attached to the cushion frame 21 .

In addition, in FIG. 3, 25 is a frame of the seat back 4, and it is rotatably supported in front and rear by the vehicle width frame 26 fixed to the floor plate extended in the vehicle width direction. That is, a corner brace 14 (not shown in FIG. 3 ) is fixed to the vehicle width frame 26 , and the lower end of the corner brace 14 is connected to the seatback frame 25 by a support pin 15 (not shown in FIG. 3 ). A raised portion of the rear end of the cushion frame 21 is connected to a position of the seatback frame 25 above the support pin 15 by a support pin 16 .

Although the specific drawings are omitted, on the central supporting parts of the seat backs 4 of the rear seats 2 on the left and right, coil springs are provided which bounce back the forward tilting downers of the seat backs 4 toppled forward. And, on the central support portion close to the central side of the vehicle body in the central support portion on both sides of the seat back 4, a hinge combination of a support mechanism for supporting the seat back 4 in a prescribed upright state and a backward or forward fall state is provided. 31. Still in Fig. 3, the state that the right seat side hinge is covered by the shell 32 is shown, and the illustration of the hinge itself is omitted. On the other hand, in the vicinity of the central support portion on the side wall side of the vehicle body in the central support portion on both sides of the seat back 4, a belt is provided for tilting the seat back 4 forward or standing up from the forward falling state to a predetermined erecting state. The electric motor of the reducer (permanent magnets generate a magnetic field type DC motor or synchronous motor) 33.

Further, the seat back 4 is provided with a transmission member 34 that disperses and transmits the operation force of the operation button 7 to each of the coupling and releasing structures on the hinge coupling 31 and the electric motor 33 side. On the transmission part 34, a rebounder to rebound to the gravitational direction of the return operation button 7 is provided. The connection and release structure will be described later. In addition, on the back side of the frame 25 of the seat back 4, when the seat back 4 is tilted down before the seat cushion 3 is folded, it is fixed as a flat storage plate 35 forming a flat storage surface.

<Drive circuit for electric motor>

As shown in Figure 4, the electric motors 33 of the left and right rear seats have built-in variable resistors and circuit breakers, and the above-mentioned automatic reset type operation switches 8 and the connecting rods as forced disconnectors are installed on each drive circuit 41. Automatic switch 42 and fuse 43. Interlocking switch 42, cut off under the state that hinge joint 31 supports chair back 4 (connect the state of this driving circuit 41), under other state, become connected shape by hinge joint rocker described later, just connect A state in which the operation switch 8 energizes the electric motor 33 (a state in which the electric motor 33 is permitted to be energized).

<Connection rod and linkage switch>

As shown in FIG. 5 , on the shell 45 of the hinge joint 31 , a hinge joint rocker 46 , which is an action part concentric with the rotation center of the seat back 4 , and the above-mentioned linkage switch 42 are provided. Interlocking switch 42, for being able to directly accept the action of hinge joint crank 46 and carry out the conversion of switching on/off, is arranged near this hinge joint crank 46.

Below, it demonstrates concretely. 6 and 7 show the relationship between the hinge joint 31 and the linkage switch 42 . Still, among Fig. 6 and Fig. 7, just model has shown hinge to combine crank handle 46. The hinge joint 31 includes: a fixed inner gear (first joint member) 51 arranged concentrically with its rotation center on the seat back 4, and a pair of locking members (second joint member) 52 arranged on the inner side of the inner gear 51 , The protruding part 53 of the driving locking part 52 . The hinged crank handle 46 is combined with the protruding part 53, and the hinged crank handle 46 and the protruding part 53 constitute an action part of the coupling and releasing structure.

The internal gear 51 includes a pair of internal teeth 54 oppositely formed on the inner surface of the ring member with its axis (same as the rotation center of the seat back 4 ) sandwiched therebetween. Between the two internal teeth 54 of this internal gear 51 is formed a raised surface 55 which is higher than the tooth end surface (protrusion with a small inner diameter).

A pair of locking members 52 are provided at positions sandwiching the above-mentioned axis, and locking teeth 56 that engage (mesh) with the internal teeth 54 are formed on the outward surfaces. These two locking members 52 are supported on the vehicle body side and can freely move in the diameter direction of the internal gear 51 (or the seat cushion side. Hereinafter, "vehicle body side" may also mean "seat cushion side") , and in the release direction combined with the internal teeth 54, that is, a rebounder (illustration omitted) that is rebounded and moved to one side of the axis. By this locking member 52 being engaged with the internal teeth 54 of the internal gear 51, the seat back 4 is supported in a locked state relative to a predetermined upright state or a forward-down state on one side of the vehicle body. That is, the seat back 4 is supported in the upright or backward state against the resilience force of the forward tilt rebounder (coil spring). The combination of the locking member 52 is released, and the seat back 4 is free to rotate relative to the vehicle body side, and as a result, the seat back 4 is tilted forward by the rebound force of the forward tilting rebounder.

The protruding member 53 is provided between the pair of locking members 52 and is rotatable around the above-mentioned axis. On the surface of the boss member 53, a pair of engaging surfaces 57 facing each other across the axis, and a pair of releasing surfaces 58 also sandwiching the axis are provided adjacent to each other in the circumferential direction. As shown in FIG. 6 , when the rotating protruding member 53 is in contact with the pair of engaging surfaces 57 toward the inner side (side of the axis) of the two locking members 52 (the first form), the two locking members 52 resist the above-mentioned rebound direction. The outer movement becomes the locked state of the seat back combined with the internal teeth 54 . On the other hand, the pair of release surfaces 58 are located closer to the axis than the engagement surfaces 57 . Therefore, protruding part 53 rotates, and as shown in Figure 7, when two releasing surfaces 58 contact with the inner surface (axis center side) of two locking parts 52 (second form), two locking parts 52 are rebounded by above-mentioned. The inside movement release internal teeth 54 are connected to the seat back in a release state.

The hinge is combined with the rocker 46 and the protruding part 53, in order to become the first form (referring to Fig. 6 ) in which the seat back 4 is supported on the side of the vehicle body by contacting the joint surface 57 with the locking part 52 and the locking part 52 in conjunction with the internal teeth 54. The direction of rotation is rebounded by a rebounder 59 . Therefore, the hinged crank handle 46 is pulled by the operating button 7 through the first traction rope 47, and as shown in Figure 7, the protrusion member 53 rotates and releases the surface 58 to the inner surface contact of the locking member 52 and becomes the second form (the seat back release state). ).

In the present embodiment, the above-mentioned operation button 7 , the transmission member 34 , the first pull rope 47 , the hinged handle 46 , the protruding member 53 and the rebounder 59 constitute the connection and release structure.

And, the interlocking switch 42, as shown in FIG. 6, is set so that the hinged handle 46 is in a cut-off state when the hinged handle 46 is in the above-mentioned first form (seat back locked state). As shown in FIG. 7 , the hinged handle 46 is moved to the seatback release position and separated from the interlock switch 42 (second form), and the interlock switch 42 is turned on.

In Fig. 8, the state that the chair back 4 is erected has been represented by a solid line, and the state of falling forward has been represented by a two-dot dash line. In the above-mentioned predetermined upright state, the interlocking switch 42 is in a cut-off state through the contact of the hinged handle 46 . After the hinged crank handle 46 is pulled by the operation button 7, the locking member 52 becomes the seat back released state, and the hinged crank handle 46 is separated from the interlocking switch 42, and the interlocking switch 42 is turned on.

This state is represented by double-dot dash line in Fig. 8, and when the chair back 4 topples forward due to the rebounding force of the forward tilting rebounder (spring), the inner gear 51 moves along with the chair back 4 as shown in Fig. 7 . Turning in the direction of arrow A brings the lock member 52 into a state of contacting the raised surface 55 of the internal gear 51 . This state is a state in which the lock member 52 is prevented from returning the projection member 53 to the seatback locked state against the rebound of the rebounder 59 . Therefore, even if the traction is released by the operation button 7, the interlock switch 42 remains on.

In this embodiment, when the seat back 4 is erected to a predetermined erected state, the locking teeth 56 of the locking member 52 are set to engage with the internal teeth 54 of the internal gear 51 relatively at a position adjacent to the raised surface 55 . Positional relationship between the internal gear 51 and the locking member 52 . Furthermore, in the above-mentioned chair back release state, even in the fully forward-falling state in which the seat back 4 falls forward and overlaps the seat cushion 3, the locking teeth 56 of the locking member 52 do not mesh with the internal teeth 54 for the raised surface 55. , even if the seat back 4 becomes the fully forward-falling state, the interlocking switch 42 also maintains the on state (the state that allows the electric motor 33 to be energized).

Therefore, turn on the operation switch 8, and the electric motor 33 starts the seat back 4 to stand up gradually. And when the seat back 4 reaches the predetermined upright state, the locking teeth 56 of the locking member 52 mesh with the internal teeth 54 of the internal gear 51, and when the seat back 4 is supported in the predetermined upright state, the interlocking switch 42 becomes the cut-off state. De-energizing the electric motor 33 stops it, ie no longer generates torque.

Also, as shown by the dotted line in Fig. 9, when the seat back 4 is in the erected state specified, the traction operation button 7 becomes the seat back release state, and the seat back 4 overcomes the rebound force of the above-mentioned front rebound rebounder. Push back to fall backwards as shown by the solid line. And, release the traction of operation knob 7, protruding part 53 is rotated due to the resilient force of rebounder 59, and the internal tooth 54 of internal gear 51 is engaged by locking part 52, and seat back 4 is supported as the state of falling backwards at an appropriate angle. The internal teeth 54 of the internal gear 51 can also be supported at a suitable angle for making the seat back 4 from the predetermined upright state to the backward approximately horizontal backward state, and a predetermined range in the circumferential direction of the internal gear is set. In addition, the state that the seat back 4 is tilted backward at a suitable angle and supported by the locking member 52, the hinge combined with the handle 46 is rotated by the rebound force of the rebounder 59 to contact the state of the interlock switch 42 (the solid line state in Fig. 9 ). Therefore, since the interlocking switch 42 is in the cut-off state, the electric motor 33 will not start even if the operation switch 8 is turned on.

<Electric Motor Seat Back Up Mechanism>

As shown in FIG. 10 , a motor support member 61 is fixed to the back frame 25 of the rear seat 2 , and the electric motor 33 is supported on the motor support member 61 . Further, on this motor supporting member 61, a driving gear 62 is supported so that the output shaft of the electric motor 33 is rotated so that the axis thereof is in the vehicle width direction. As shown in FIG. 11, the drive gear 62 is rotated by a worm 63 coupled to the output shaft of the electric motor 33. Still, the electric motor 33 and the worm 63 are collectively referred to as an electric motor. However, in the present invention, the case where the drive gear 62 is driven only by the electric motor 33 without passing through the worm is also included. On the other hand, a corner bracket 64 fixed to the vehicle body floor supports a rotatably driven gear 65 concentric with the rotation center of the seat back 4 of the rear seat 2 . The driven gear 65 is engaged with the drive gear 62 .

The driven gear 65 is integrally provided with a coupling gear 66 which rotates together with the driven gear 65 . On the other hand, a universal joint member 67 capable of meshing with a coupling gear 66 is rotatably supported on a support shaft 68 in the vehicle width direction that supports the corner bracket 64 . However, this universal joint member 67 is rebounded by a rebounder (spring) 69 for rotating in a direction in which the coupling gear 66 is coupled. Further, the motor support member 61 is rotatably supported by a release crank 71 by a support shaft 71 in the vehicle width direction. The release crank 71 is to resist the rebound force of the above-mentioned rebounder 69 to release the connection to the connection gear 66 of the universal joint member 67 . In this case, the joint gear 66 and the universal joint member 67 constitute a joint disconnector that prevents the passive gear 65 from rotating together with the seat back 4 .

On the coupling gear 66, a plurality of coupling teeth 74 are formed at predetermined intervals in the circumferential direction to which the tip universal joint 73 forming the universal joint member 67 is coupled. The tooth surface (joint surface) of the combined tooth 74 is parallel to the axis of the driven gear 65 towards the front of the rotation direction when the chair back is tilted forward, and expands in the approximate diameter direction of the driven gear 65. Also, the installation interval of the coupling teeth 74 is set to 120 degrees, which is slightly larger than the forward tilting angle (100 to 115 degrees) of the seat back 4 from the above-mentioned predetermined upright state to the forward fully forward tilting state. . Therefore, in this embodiment, three coupling teeth 74 are provided. Still, there can be one or two engaging teeth 74.

Therefore, the universal joint 73 of the universal joint member 67 is engaged with the coupling teeth 74 of the coupling gear 66, and the driven gear 65 cannot rotate in the seatback forward direction. Therefore, when the seat back 4 is in the forward-falling state, the universal joint part 67 is in the above-mentioned combined state to start the electric motor 33, so that the driving gear 62 is rotated in the erecting direction of the seat back, and the rotation is stopped by the universal joint part 67 by the driven gear. 65 receives the rotational reaction force of the drive gear 62 . As a result, the drive gear 62 rotates while the driven gear 65 rotates in the direction of seat back rotation, that is, the seat back 4 is erected by changing the meshing position of the drive gear 62 and the driven gear 65 . That is, the torque of the electric motor 33 is transmitted to one side of the vehicle body through the driving gear 62 and the driven gear 65, and the seat back is erected.

In the present embodiment, the electric motor 33 sets the time required for the seat back 4 to be erected to the above-mentioned prescribed erected state from the fully forward-down state to be less than seven seconds (preferably three to four seconds). In addition, the above-mentioned front fall rebounder sets the time for the seat back 4 from the above-mentioned specified upright state to the fully forward-falling state. The time required for the state is short. Thus, while ensuring safety, the moving time between the completely forward-falling state and the erected state is shortened, and convenience is improved.

<transfer canceller>

The universal joint member 67 is provided with a pin 76 as a receiving portion for receiving the releasing force from the releasing crank 71 . On the other hand, the release crank 71 is provided with a pin contact portion 77 that contacts from the coupling gear 66 side where the pin 76 coupled to the universal joint member 67 exists. The handle 71 is released, and is rebounded by a rebounder (spring) 78 so that the pin contact portion 77 rotates in a direction away from the pin 76 . And, this release handle 71 is combined with the second pull rope 79 extending and connecting the operation button 7 from the transmission member 34 described above. That is, the traction force of the operating button 7 is transmitted to the release handle 71 through the second pull rope 79, and the release handle 71 resists the rebound force of the rebounder 78 to rotate the universal joint member 67, that is, to release the coupling gear 66. The combined direction of rotation. In this case, the operating button 7, the transmission part 34, the second traction rope 79, the release handle 71 and the rebounder 78 constitute the electric motor 33 that is not activated when the back of the chair falls forward by combining the separator to release the rotation of the passive gear 65. Become a transfer reliever of resistance.

When the release crank 71 is in a shaken state to separate the universal joint member 67 from the coupling gear 66, the seat back 4 begins to fall forward from the prescribed upright state. At this time, the release crank 71 is accompanied by the seat back 4 The rotation moves away from the gimbal member 67 . Therefore, the pin contact portion 77 of the release crank 71 is released from the pin 76 of the universal joint member 67 , and the universal joint member 67 returns to the direction in which it is engaged with the engaging gear 66 .

In addition, a convex surface 81 is formed between adjacent coupling teeth 74 in the circumferential direction of the coupling gear 66 . This convex surface 81 contacts with the front end of the universal joint 73 of the universal joint member 67 that has been released from the coupling with the coupling teeth 74 by the rebound of the above-mentioned rebounder 69 when the seat back 4 is tilted forward. object. This convex surface 81 receives the restoring force of the above-mentioned rebounder 69 through the universal joint 73, and is an object that impels the coupling gear 66 and the driven gear 65 to rotate to the forward direction of the chair back.

For this reason, convex surface 81, from the tooth surface apex (the position farthest from the axis center) of each coupling tooth 74, toward the tooth surface base end (closest to the rotation direction rear side) of coupling tooth 74 next to the rotation direction rear side when the chair back falls forward axis), the radius is gradually shortened (inclined). And, the universal joint member 67 is arranged so that the restoring force of the above-mentioned rebounder 69 is applied in a direction forming an acute angle with respect to the above-mentioned convex surface 81 on the front side of the above-mentioned rotation direction.

Therefore, as shown in FIG. 11 , when the seat back 4 is in a predetermined upright state, the universal joint member 67 is engaged with the engaging teeth 74 of the engaging gear 66 . When the operation knob 7 is pulled, as shown in FIG. 12 , the release handle 71 is rotated in the release direction, and accordingly, the universal joint member 67 is rotated in the release direction to disengage from the coupling teeth 74 of the coupling gear 66 . As a result, the driven gear 65 is released from the restraint on the vehicle body side by the universal joint member 67, and can rotate in the seat back forward direction together with the seat back 4 receiving the resilience force of the coil spring of the front rebound rebounder.

Therefore, when the seat back 4 is tilted forward, the driven gear 65 rotates in the forward tilting direction together with the seat back 4 . At this time, the meshing position of the driving gear 62 and the driven gear 65 is relatively constant, which means that there is no need to make the output shaft of the electric motor 33 passing through the driving gear 62 rotate in the opposite direction as when the seat back is erected. For this reason, it is possible to prevent the reverse torque generated when the electric motor 33 is rotated by an external force, or the rotation resistance of the reduction gear due to the meshing of the driving gear 62 and the driven gear 65, the meshing of the driving gear 62 and the worm 63, etc. The resistance of dumping volts.

Also, after the seat back 4 starts to tilt forward, the release crank 71 moves in a direction away from the universal joint member 67 along with the rotation of the seat back 4 . Thereby, as shown in FIG. 13 , the pin contact portion 77 of the release crank 71 is disengaged from the pin 76 of the universal joint member 67, and the universal joint 73 of the universal joint member 67 is contacted by the rebound of the rebounder 69. On the raised surface 81 of the engagement gear 66 . As a result, the driven gear 65 is rebounded by the rebounder 69 to rotate in the forward tilting direction of the seat back. For this reason, driven gear 65 just really rotates toward the chair back forward tilting direction together with seat back 4.

As shown in FIG. 14 , when the seat back 4 is fully tilted forward, the universal joint member 67 is in a state capable of engaging with the adjacent or next engaging tooth 74 of the protrusion surface 81 of the engaging gear 66 . Therefore, when the electric motor 33 is started, the driving gear 62 rotates the driven gear 65, and the seat back 4 can be erected. Furthermore, by setting the installation pitch of the coupling teeth 74 to the above-mentioned 120 degrees, when the electric motor 33 is not rotated at all during the forward tilt of the seat back 4, when the seat back 4 becomes completely forward tilted, the universal joint member The front end of 67 is just in the position in front of adjacent coupling tooth 74. Therefore, from the start of the electric motor 33, until the action of erecting the seat back 4 is started by combining the starting universal joint part 67 with the adjacent coupling teeth 74, the time delay is shortened, and it is beneficial for the rapid erection of the seat back 4. advantageous.

<Operation of the rear seat>

The operation of each part when the rear seat 2 is operated will be described in the same manner as above.

—Front fall of the back of the chair—

When the chair back 4 was in the erect state specified, the hinged joint 31, as shown in FIG. For this, the protruding surface 52 of the protruding part 53 is brought into contact with the locking part 52 which is combined with the internal teeth 54 of the internal gear 51 . Thereby, the seat back 4 is supported in this upright state. Also, the hinged handle 46 contacts the interlocking switch 42 (the state of the solid line in FIG. 9 ), and the interlocking switch 42 becomes an off state. Therefore, even if the operation switch 8 is turned on, the electric motor 33 will not be started. On the other hand, in the erecting mechanism portion of the electric motor 33 , as shown in FIG. 11 , the universal joint member 67 is coupled to the coupling teeth 74 of the coupling gear 66 .

In the erected state, the operation button 7 is pulled, and the hinge handle 46 in the hinge combination 31 is pulled by the first traction rope 47 and rotates upward together with the protruding part 53, thereby releasing the seat back 4 through the locking part 52. support (see Figure 7). That is, the chair back 4 has just become toppled forward by the rebound of the rebounder before falling. On the other hand, in the erecting mechanism part, the release crank 71 is pulled by the second traction rope 79, whereby the universal joint 73 of the universal joint part 67 is disengaged from the coupling teeth 74 of the coupling gear 66, and the driven gear 65 is relatively The vehicle body can freely rotate (see FIG. 12 ).

Therefore, when the seat back 4 falls forward due to the rebound of the forward rebounder, the driven gear 65 rotates together with the seat back 4 in the forward direction of the seat back. Therefore, there is actually no need to rotate the drive gear 62 of the electric motor 33 , and the electric motor 33 is prevented from becoming a forward resistance of the seat back 4 . That is, if the worm 63 is coupled to the output shaft of the electric motor 33 as in the present embodiment, and the drive gear 62 is engaged with the worm 63 , the worm 63 becomes the rotational resistance of the drive gear 62 . But, as mentioned above, since there is no need to reverse the drive gear 62 when the seat back 4 is tilted forward (the reverse torque will not act on the drive gear 62), so the worm 63 is avoided, that is, the electric motor 33 becomes the seat back. Resistance when tipping forward. Therefore, when the seat back 4 is toppled forward, it is not necessary to exert a large external force, and the seat back 4 can be quickly and surely tilted forward only by the rebound of the front rebounder. It takes too much effort to back 4.

When the seat back 4 starts to fall forward from the above-mentioned upright state, as shown in FIG. The spring back is pushed onto the raised surface 81 of the engaging gear 66. As a result, the coupling gear 66 is provided with the power to rotate forwardly of the chair back provided by the rebounder 69, and the driven gear 65 is promoted to rotate forwardly of the chair back. Therefore, it is avoided that the rotational force in the opposite direction is generated on the drive gear 62, that is, the electric motor 33 is prevented from becoming the resistance of the chair back falling forward. After the seat back 4 is completely laid down on the seat cushion 3, as shown in FIG.

Still, even if the traction of the operation button 7 is released before the crank handle 71 is disengaged from the universal joint part 67, once the universal joint part 67 is disengaged from the coupling teeth 74 of the coupling gear 66, due to the forward fall of the seat back 4, the universal joint will The joint member 67 is in contact with the raised surface 81 .

On the other hand, in the hinge joint 31 side, since the seat back 4 starts to fall forward, as shown in FIG. State of face 55. The lock member 52 is in contact with the raised surface 55 and the seat back 4 is brought into the above-mentioned completely forward-falling state. Therefore, even if the traction of the operation button 7 is released during the forward fall of the seat back 4, the seat back 4 continues to fall forward due to the above-mentioned forward fall rebounder. Also, by the contact of the raised surface 55 of the lock member 52, the hinge joint handle 46 is disengaged from the interlock switch 42, and the interlock switch 42 becomes an on state (the state of allowing the electric motor 33 to be energized if the operation switch 8 is turned on). ), even if the traction of the operation button 7 is released, the connected state will be maintained.

Still, after the traction of the operating button 7 is released, since the locking teeth 56 of the locking member 52 contact the raised surface 55 of the internal gear 51, the hinge combined with the handle 46 does not return completely. For this reason, the first traction rope 47 can appear. relaxation.

By falling forward of the seat back 4, the seat cushion 3 is pushed forward by the seat back 4, and as shown in Figure 2, the forward falling of the connecting rod 13 reduces the height of the seat cushion 3, and the seat back 4 is folded thereon. As a result, the load compartment 5 is expanded toward the vehicle compartment side, and objects can be placed on the back of the seat back 4 as well.

—The erection of the back of the chair—

In the state where the seat back 4 is fully forward on the seat cushion 3, as described above, since the interlock switch 42 is turned on, the operation switch 8 of the load compartment 5 is pressed, and the electric motor 33 is activated by the energization from the battery. (Refer to Figure 4). On the other hand, as shown in FIG. 14 , in the fully forward tilted state, the universal joint member 67 is coupled to the coupling teeth 74 of the coupling gear 66 , and the driven gear 65 is prevented from rotating in the forward direction of the seat back. .

Therefore, by the activation of the electric motor 33 , the drive gear 62 rotates, its rotational reaction force is received by the driven gear 65 , and the drive gear 62 rotates the teeth of the driven gear 65 . That is, the seat back 4 is gradually erected. In this erection of the seat back 4, as shown in FIG. 4, since the lock member 52 of the hinge joint 31 is in contact with the raised surface 55 of the internal gear 51, the interlock switch 42 remains on. Therefore, as long as the operation switch 8 is pressed, the electric motor 33 can be kept on.

When the seat back 4 is in the upright state shown in FIG. 11 , as shown in FIG. 6 , the internal teeth 54 of the internal gear 51 are opposite to the locking member 52 . As a result, the lock member 52 is engaged with the internal teeth 54, and the seat back 4 is supported in this upright state. Simultaneously, the hinged rocker 46 is rotated downward by the rebound of the rebounder 59 to contact the interlocking switch 42, and the interlocking switch 42 becomes on state. Therefore, the operation switch 8 is in a state of being pressed, the energization to the electric motor 33 is cut off by the interlock switch 42, and the electric motor 33 is in a state of not generating torque.

Just like this, by continuing to press the operation switch 8, the seat back 4 can be erected until the prescribed erect state. And, when the seat back 4 reaches the predetermined upright state, even if the operation switch 8 is continued to be pressed, the action of the electric motor 33 will stop, and the seat back 4 is surely supported in the upright state. Therefore, when the driver raises the seat back 4 from the forward-folded state, there is no need to operate the operation switch 8 while confirming the erection of the seat back 4, even if the operation switch 8 is operated from the cargo compartment 5 separated from the rear seat 2. , also chair back 4 can be really erected to the erected state of regulation. That is, it is possible to prevent the seat back 4 from being erected more than intended, or from falling too far backward to cause uncomfortable riding, and also avoiding that the cargo storage space on the back of the seat back is too narrow.

In addition, because the electric motor 33 no longer generates torque, it avoids overloading the seat back 4 or the hinge joint 31, which is beneficial to improving the durability of the rear seat 2.

In addition, because the operation switch 8 is an automatic reset type switch, so stop pressing the operation switch 8 on the way of setting up the seat back 4, the energization to the electric motor 33 is interrupted and the seat back 4 stops standing up. Therefore, when the seat back 4 is erected by the electric motor 33, when an object is caught between the seat back 4 and the side wall of the vehicle body, or the object in the loading compartment 5 is about to hit the seat back 4, the object may be When damaged, as long as the hand leaves from the operating switch 8, the seat back 4 is stopped midway to avoid accidents.

When the electric motor 33 is stopped during the erection of the seat back 4, the universal joint member 67 is coupled to the coupling teeth 74 of the coupling gear 66, preventing the driven gear 65 from rotating in the forward direction of the chair back. Therefore, the seat back 4 accepts the rebounding force of the rebounder for falling forward, and the electric motor 33 becomes a resistance so as not to fall forward immediately. In addition, after the electric motor 33 is stopped during the erection of the seat back 4, the operation switch 8 is turned on again, and the seat back 4 is continuously erected to a predetermined erected state, and the electric motor 33 is supported to be erected in the state where the electric motor 33 is stopped. state.

Also, when the operation button 7 is pulled to make the seat back 4 turn on the operation switch 8 in the forward and backward direction from the erected state, the seat back 4 returns to the predetermined erected state. On the way forward of the chair back 4, the interlocking switch 42 is in a connected state as mentioned above, and if the operation switch 8 is connected, the electric motor 33 is energized. But, as shown in Figure 13, on the way forward, even because the electric motor 33 rotates the driving gear 62, the seat back 4 will not rotate to the erecting direction at once. By the rotation of the driving gear 62, the driven gear 65 and the coupling gear 66 rotate to the forward direction of the seat back, and the coupling teeth 74 of the coupling gear 66 are combined with the universal joint member 67 to prevent the passive gear 65 from moving forward. The rotation of that point starts, and the chair back 4 starts to stand up.

—The reclining of the back of the chair—

When the seat back 4 is in the predetermined upright state, the interlock switch 42 is turned on as described above. From this state, in order to push back the seat back 4, the traction operation button 7 is released by the middle of the support of the seat back 4 by the hinge joint 31, and the operation switch 8 is misoperated to be connected, but because the operation button 7 is pulled The interlock switch 42 is disabled, and the electric motor 33 is energized to rotate. However, the so-called operating button 7 is pulled, that is, the connection between the universal joint member 67 and the coupling gear 66 is released, so even if the electric motor 33 operates, torque will not be transmitted to the seat back. That is, the seat back 4 is not toppled backward by the electric motor 33, improving safety.

Topple back in the chair back 4, pull the operating button 7, overcome the power of the chair back 4 being toppled forward by the rebound of the rebounder before falling, and the chair back 4 is pushed down backward. For example, the driver is in the riding state and can push the seat back 4 backwards by his back. And, when the seat back 4 reaches a suitable reclining angle, the traction of the operation button 7 is released, and the locking member 52 of the hinge joint 31 is coupled to the internal teeth 54 of the internal gear 51, and the seat back 4 is supported at the reclining angle.

In the state of pulling the operating button 7, as shown in FIG. 12 , the universal joint part 67 is separated from the coupling gear 66, so the driven gear 65 is free from the resistance of the universal joint part 67, and the seat back can rotate backward. Therefore, the driven gear 65 maintains the same meshing position as the driving gear 62, and rotates backward together with the seat back 4, and the electric motor 33 will not become the backward resistance of the seat back.

In addition, when the crank handle 71 is released and the seat back 4 is in the upright state, the posture is restricted by the second pull rope 79 in order to make the pin 76 contact the posture, constituting a torque transmission limiter of the electric motor 33 . That is, when the seat back 4 is moved backward, the more the seat back 4 is tilted to the rear side, the release handle 71 is tilted backward as a whole, and the universal joint part 67 is tilted backward to release the universal joint. Combination of part 67 and coupling teeth 74 of coupling gear 66 . Therefore, even if the electric motor 33 is driven, the combined gear 66 and the driven gear 65 idle together, preventing the seat back 4 from falling backward.

Through such a function, for example, when the driver sits on the seat, even if the operation switch 8 is inadvertently touched, when the driver pulls the operation button 7 for the seat back 4 to be tilted backward, or the second The aging of the traction rope and the like cannot remove the combination of the universal joint part 67 and the coupling gear 66, as long as the receding degree of the seat back 4 is above the specified level (viewed from the side, the angle formed by the seat back 4 and the horizontal line is below the specified angle) , the chair back 4 will no longer fall backwards. Or, as soon as the driver pulls the operation button 7, he starts to fall backward abnormally due to the above-mentioned reasons. Will not fall back again. As a result, damage to items in the cargo compartment or discomfort to the occupants can be alleviated. Still, the angle of above-mentioned regulation can change to some extent according to the shape or the setting position of releasing crank, as only tilting a little backward from the erected state of chair back 4, limit the inclination above this. That is, it is also possible to substantially limit the backlash of the electric motor 33 .

In addition, when the chair back 4 is in the backward state, the traction operation button 7 releases the support of the chair back 4 of the hinge joint 31, and the chair back 4 is erected from the backward backward state by the rebound of the front rebounder. Also in this case, the universal joint part 67 of the release crank 71 is disengaged from the coupling gear 66, and the seat back 4 can be erected without the resistance of the electric motor 33. And, when the seat back 4 is erected to a desired angle, the pulling of the operation button 7 is released, the locking member 52 of the hinge joint 31 is coupled to the internal teeth 54 of the internal gear 51, and the seat back 4 is supported at this angle. Also, if the traction state of the operation button 7 is continued, the hinge joint 31 is in the state of unsupporting, and the seat back 4 continues to fall forward from the above-mentioned rear toppled state.

Furthermore, in a vehicle in which the above-mentioned rear seat 2 is not provided, the structure of this embodiment may be applied to a seat corresponding to the above-mentioned middle row seat 1 .

The present invention is not limited to the exemplary embodiments, and various improvements and design changes are possible without departing from the gist of the present invention.

Claims (17)

1. A seat device for a vehicle, comprising a seat back (4), the seat back (4), centered on the vicinity of the rear end of the seat cushion (3), respectively capable of realizing a predetermined upright state and a direction toward the seat. In a state where one side of the cushion (3) is tilted or folded, and the vehicle seat device is arranged adjacent to the load compartment (5) on the vehicle front side of the load compartment (5), the features are as follows: Including electric motor (33) and driving circuit (41), The above-mentioned electric motor (33) rotates the above-mentioned seat back (4) around the rear end portion of the above-mentioned seat cushion (3) as the center, and The above-mentioned driving circuit (41) operates the above-mentioned electric motor (33), and in addition Above-mentioned driving circuit (41) comprises: The operation switch (8) is an operation switch that automatically resets to off, and it is installed in the cargo compartment separated from the rear of the above-mentioned vehicle seat. By turning it on, the above-mentioned seat back (4) can The above-mentioned electric motor (33) that the above-mentioned forward falling state is erected starts, The forced disconnector (42), when the above-mentioned seat back (4) is erected to the above-mentioned upright state by the on-operation of the above-mentioned operation switch (8), in order to make the seat back no matter whether the on-operation continues or not. (4) stop on the erect state position, cut off the electric motor (33) current leading to the above-mentioned electric motor (33) by the above-mentioned drive circuit (41), a supporting mechanism (31), supporting the chair back (4) in the upright state, The operating part (7) releases the support of the support mechanism (31) to the chair back (4), and The first rebounder, when the support of the support mechanism (31) to the chair back (4) is released, rebounds the chair back (4) to make the chair back (4) rotate to the forward falling state. 2. The vehicle seat device according to claim 1, characterized in that: The above-mentioned seat back (4) may also be in a state of inclination to the rear or backward than the above-mentioned upright state. 3. The vehicle seat device according to claim 2, characterized in that: It also includes a first coupling part (51), a second coupling part (52), a coupling/releasing structure (7, 34, 46, 47, 53, 59), The above-mentioned first coupling part (51) is arranged on the above-mentioned chair back (4), The second connecting member (52) is arranged on the seat cushion (3) or the vehicle body, and is combined with the first connecting member (51) to support the posture of the seat back (4), and The above-mentioned coupling/release structure (7, 34, 46, 47, 53, 59), when the above-mentioned chair back (4) is in the above-mentioned upright state or the above-mentioned rear lying state, combines the above-mentioned first coupling member (51) and the second coupling member (51). The connecting member (52) is in the first form, and when the above-mentioned seat back (4) is in the above-mentioned forward-folded state, the combination of the above-mentioned two connecting members (51, 52) is released to form the second form. The above-mentioned forced cutter (42) is linked to the action of the above-mentioned combination/release structure (7, 34, 46, 47, 53, 59), and the connection/release structure (7, 34, 46, 47, 53, 59) When becoming the above-mentioned first form, the energization from the above-mentioned drive circuit (41) to the above-mentioned electric motor (33) is cut off to become a cut-off state, and the connection/release structure (7,34,46,47,53,59) becomes the above-mentioned In the second form, the interlocking switch that is turned on by the power supply from the drive circuit (41) to the electric motor (33) is turned on. 4. The vehicle seat device according to claim 3, characterized in that: The above-mentioned combination/disengagement structure (7, 34, 46, 47, 53, 59) includes an action part (46, 53), a second rebounder (59), and the operation part (7), The above-mentioned action parts (46, 53) are between the action position of contacting the first connection part (51) and the second connection part (52) to make the connection part connect to the other connection part, and the release position of releasing the connection. move, The above-mentioned second rebounder (59) makes the above-mentioned action parts (46, 53) rebound to the above-mentioned action position, The above-mentioned operation part (7) is connected and arranged on the above-mentioned operation part (46, 53) by an operation transmission part (47) at a position farther than the operation part (46, 53), in order to release the above-mentioned first coupling part (51 ) and the above-mentioned second coupling member (52) make the above-mentioned action member (46, 53) move to the release position against the above-mentioned rebound force, and in addition The above-mentioned forced disconnector (42) is in the cut-off state when the above-mentioned action member (46, 53) is directly moved to the above-mentioned action position, and is in the on-state when the above-mentioned action member (46, 53) moves to the above-mentioned release position. 5. The vehicle seat device according to claim 4, characterized in that: The above-mentioned first connecting member (51) is arranged concentrically with the rotation center of the seat back (4) so that it rotates together with the above-mentioned seat back (4), The above-mentioned action member (53) is in contact with the above-mentioned second coupling member (52), Through the rotation of the above-mentioned first connecting member (51) together with the above-mentioned seat back (4), the connecting position of the above-mentioned second connecting member (52) relative to the above-mentioned first connecting member (51) can be selectively changed, and the The reclining angle of the above-mentioned chair back (4). 6. The vehicle seat device according to claim 2, characterized in that: The above-mentioned electric motor (33) is arranged on one part of the above-mentioned seat cushion (3) and the above-mentioned seat back (4), or is arranged on one part of the vehicle body and the above-mentioned seat back (4). The part transmits the torque, and the chair back (4) is rotated around the rear end of the seat cushion (3) to make it stand up. A transmission canceler (71) is further included for preventing reverse torque from being transmitted from the seat back (4) to the electric motor (33) when the seat back (4) is in the forward tilted state. 7. The vehicle seat device according to claim 6, characterized in that: Also includes drive gear (62), driven gear (65), combined separator (66, 67, 69), The above-mentioned driving gear (62) is arranged on the above-mentioned one member, and as the output shaft of the above-mentioned electric motor (33) rotates, The above-mentioned driven gear (65) is arranged to be coaxial with the rotation center of the above-mentioned chair back (4) and rotate freely, and is also meshed with the above-mentioned driving gear, The above-mentioned combined separator (66, 67, 69) is arranged on the above-mentioned other part, so that the above-mentioned chair back (4) can be erected by the above-mentioned electric motor (33) through the rotation of the drive gear (62), preventing the above-mentioned passive The gear (65) rotates relative to the above-mentioned other part, and additionally The transmission canceler (71) releases the prevention of the rotation of the driven gear (65) by the coupling separator (66, 67, 69). 8. The vehicle seat device according to claim 7, characterized in that: The above-mentioned combination separator (66, 67, 69) includes: a combination gear (66) that rotates integrally with the above-mentioned driven gear (65), and a universal joint member (67) that is combined with the combination gear (66). The third rebounder (69) that the universal joint part (67) rebounds towards the direction of the above-mentioned coupling gear (66), in addition On the above-mentioned coupling gear (66), there are a plurality of coupling teeth (74) for preventing the rotation of the above-mentioned universal joint member (67) relative to the above-mentioned driven gear (65). The above-mentioned seat cushion (3) is provided in the circumferential direction at intervals equal to or greater than a rotational forward tilt angle to a predetermined forward tilted state in which one side of the seat cushion (3) is tilted or fallen. 9. The vehicle seat device according to claim 8, characterized in that: Between the teeth of the adjacent coupling teeth (74) of the above-mentioned coupling gear (66) in the circumferential direction, contact the above-mentioned universal joint member (67), forming a spring-back force caused by the above-mentioned third rebounder (69). Said driven gear (65) rotates relative to said other member's raised surface (81). 10. The vehicle seat device according to claim 6, characterized in that: The above-mentioned transmission release device (71) is linked to release the operation of the above-mentioned operation member (7) supported by the above-mentioned support mechanism (31) on the seat back (4), so as not to transfer from the above-mentioned seat back (4) to the above-mentioned electric motor. (33) The effect of transmitting reverse torque. 11. The vehicle seat device according to claim 6, characterized in that: The above-mentioned seat cushion (3) is lowered along with the forward tilt of the above-mentioned seat back (4), and is raised with the erection of the seat back (4), so that the vehicle body to which the seat back (4) is connected can Combined freely. 12. The vehicle seat device according to claim 1, characterized in that: The above-mentioned electric motor (33) is arranged on one part of the above-mentioned seat cushion (3) and the above-mentioned seat back (4), or is arranged on one part of the vehicle body and the above-mentioned seat back (4), and is connected to the other part. Torque is transmitted, and the seat back (4) in the above-mentioned forward-falling state is rotated and erected around the vicinity of the rear end portion of the above-mentioned seat cushion (3) until the above-mentioned erect state. 13. The vehicle seat device according to claim 12, characterized in that: When the above-mentioned chair back (4) is released from the support of the above-mentioned support mechanism (31), the chair back (4) can be pushed to the rear side by resisting the rebound force of the above-mentioned first rebounder, and it can also be erected more than the above-mentioned. The state leans more backward or falls down, The above-mentioned support mechanism (31), on the basis of being able to support the above-mentioned chair back (4) in the above-mentioned upright state, can also support in the above-mentioned backward state. 14. The vehicle seat device according to claim 13, characterized in that: The electric motor (33) sets the time required for the chair back (4) to be erected from the forward-folded state folded on the seat cushion (3) to the erected state to be less than seven seconds. 15. The vehicle seat device according to claim 12, characterized in that: The above-mentioned first rebounder and the above-mentioned electric motor (33) are set so that the time for the above-mentioned seat back (4) to be folded from the above-mentioned upright state to the forward-falling state of the above-mentioned seat cushion (3) is shorter than that of the above-mentioned front fall. The time for the state of lying on the chair cushion (3) to move to the above-mentioned erected state is short. 16. The vehicle seat device according to claim 2, characterized in that: The above-mentioned supporting mechanism (31) also supports the above-mentioned chair back (4) in the above-mentioned rear lodging state, in addition The above-mentioned electric motor (33) is arranged on one part of the above-mentioned seat cushion (3) and the above-mentioned seat back (4), or is arranged on one part of the vehicle body and the above-mentioned seat back (4), and is connected to the other part. Torque is transmitted, and the chair back (4) in the above-mentioned forward-falling state is rotated and erected around the rear end portion of the above-mentioned seat cushion (3) until the above-mentioned erected state, When the above-mentioned chair back (4) is released from the support of the above-mentioned upright state by the above-mentioned support mechanism (31), it can resist the rebound force of the above-mentioned rebounder from the above-mentioned upright state to fall backward. 17. The vehicle seat device according to claim 16, characterized in that: A transmission canceler (71) is included for canceling the transmission of the torque of the electric motor (33) to the other member when the seat back (4) is in the rear lying state.

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