JP2018144589A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a seat position to be adjusted with high flexibility without causing enlargement of the structure.SOLUTION: A seat 1 is attached onto a floor F and has a connection mechanism 10 which connects the seat 1 to the floor F in a state where six degree-of-freedom motion is possible by a parallel mechanism including six actuators 13 which may expand or contract.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat that is mounted on a vehicle floor.

  2. Description of the Related Art Conventionally, in a vehicle seat, a configuration including a connection mechanism that connects a seat body to a floor so that the position of the seat body can be adjusted is known (Patent Document 1). The connection mechanism is configured such that the seat body is connected to the floor by a plurality of support arms and rods so as to be movable in the height direction and the width direction.

Special table 2014-509989 gazette

  In the above prior art, in order to make it possible to adjust the position of the seat body in another direction, it is necessary to add another mechanism serially, and the configuration becomes complicated. The present invention was devised as a solution to the above problem, and the problem to be solved by the present invention is to enable the seat position to be adjusted with a high degree of freedom without causing an increase in the size of the structure. It is in.

  In order to solve the above problems, the vehicle seat of the present invention takes the following means.

  A first invention is a vehicle seat mounted on a vehicle floor, wherein the vehicle seat is capable of movement with six degrees of freedom by a parallel mechanism having six actuators that can be extended and retracted with respect to the vehicle floor. And a connecting mechanism for connecting to.

  According to the first aspect of the present invention, the seat position of the vehicle seat can be arbitrarily adjusted with six degrees of freedom by the connecting mechanism. Therefore, the seat position can be adjusted with a high degree of freedom by a compact configuration compared to a configuration in which a plurality of adjustment mechanisms are serially assembled.

  The second invention is the following configuration in the first invention described above. The actuator is configured by a combination of a linearly extending screw and a hollow motor that drives the screw to extend and contract in the axial direction.

  According to the second aspect of the present invention, by using the hollow motor as the actuator drive source, it is possible to perform the expansion and contraction drive of the screw with a high reduction ratio so as to exhibit high output and high strength.

1 is a perspective view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is an expansion perspective view of a connection mechanism. It is the top view which showed the initial state of the connection mechanism typically. FIG. 10 is a plan view illustrating a state in which the coupling mechanism is moved to move the seat position laterally. It is a perspective view showing the state where the seat position was adjusted to an arbitrary shape.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

<< About schematic structure of sheet 1 >>
First, the configuration of the seat 1 (vehicle seat) according to the first embodiment will be described with reference to FIGS. In the following description, when directions such as front / rear, up / down, left / right, and the like are indicated, the directions shown in the drawings are indicated.

  As shown in FIG. 1, the seat 1 according to the present embodiment is configured as an automobile seat, and includes a seat back 2 that serves as a backrest portion of a seated person and a seat cushion 3 that serves as a seating portion. It is said that. The seat back 2 described above is supported by connecting the lower end portions of the left and right sides to the rear end portions of the left and right sides of the seat cushion 3 via a recliner (not shown). The seat cushion 3 is connected to a vehicle floor F by a connecting mechanism 10 that constitutes a parallel mechanism with six actuators 13 that can be driven to extend and contract, so that the movement of six degrees of freedom is possible.

  Specifically, as shown in FIG. 2, the connecting mechanism 10 described above includes a base plate 11 fixed on the floor F, a top plate 12 fixed to the bottom surface of the seat cushion 3, and these top plates 12. And the base plate 11 include six actuators 13 connected to form a parallel mechanism, and a controller 14 that controls the operation of each actuator 13. Each of the actuators 13 described above is formed in a shape extending linearly in the height direction, and an upper end portion and a lower end portion thereof are respectively connected to the top plate 12 and the base plate 11 by the cross joint 13A. It is in a state of being connected in a form that can freely change the angle.

  Specifically, the six actuators 13 described above have a continuous truss shape with a total of six triangular and inverted triangular frameworks in the circumferential direction between the top plate 12 and the base plate 11 as follows. It is configured to be lined up. Specifically, each of the six actuators 13 described above has a shape in which the upper ends of each of the six actuators 13 are brought together as a set, and is about 120 degrees in the circumferential direction with respect to the top plate 12 described above. Are spaced apart from each other by a cross joint 13A so as to be rotatable (see FIG. 3).

  Specifically, the two actuators 13 in each set described above are separately connected to the top plate 12 with a slight gap in the circumferential direction by separate cross joints 13A. . Note that the two actuators 13 in each set described above may be collectively connected to the top plate 12 at the same position by a common cross joint 13A.

  Each of the six actuators 13 described above has a shape in which the lower end of each of the six actuators 13 is brought into a set of two adjacent combinations different from the above, and is circular with respect to the base plate 11 described above. It is in a state where it is rotatably connected to a position on the same circumference by a cross joint 13A with an interval of about 120 degrees in the circumferential direction (see FIG. 3). Specifically, the two actuators 13 in each group described above are separately connected to the base plate 11 with a slight gap in the circumferential direction by separate cross joints 13A. . Note that the two actuators 13 in each set described above may be collectively connected to the base plate 11 at the same position by a common cross joint 13A.

  As shown in FIG. 2, each actuator 13 described above has a screw 13B extending linearly in the height direction and a hollow motor 13C connected to the lower portion of the screw 13B. Each of the hollow motors 13C described above has a configuration in which a substantially cylindrical rotor is also incorporated in a substantially cylindrical stator, and the lower end of the stator is placed on the base plate 11 by the cross joint 13A described above. Each of them is connected.

  And each hollow motor 13C mentioned above is set as the structure by which each screw 13B was screwed in the axial direction from the upper side with respect to the cylinder of the rotor of those inside, and was connected. And each said screw 13B connected is set as the structure by which those upper end parts were each connected under the top plate 12 by the cross joint 13A mentioned above. Specifically, the screw shape screwed into the rotor of each hollow motor 13C of each screw 13B described above is a screw shape of a trapezoidal single-thread screw, and is screwed to the rotor of each hollow motor 13C described above. Therefore, the rotational output from each hollow motor 13C can be output at a high reduction ratio.

  With the above configuration, each of the hollow motors 13C described above is in a state where the driving of their rotors is stopped in their initial state, and by the self-braking property by engagement of the high reduction ratio with each of the screws 13B, The feed position in the axial direction of each screw 13B (the total length of each actuator 13) is held at a fixed position.

  Each of the hollow motors 13C described above receives a predetermined signal input from the controller 14 described above, and rotates each rotor in either the forward or reverse direction based on the signal information. The hollow motor 13C is operated to expand and contract in the axial direction. By the above operation, the total length of each actuator 13 is individually adjusted, and the position of the top plate 12 supported by these actuators 13 with respect to the base plate 11 can be changed. The basic structure of the hollow motor 13C described above is the same as a known configuration disclosed in a document such as JP-A-2006-131417, and a detailed description thereof will be omitted.

  As shown in FIG. 3, in the coupling mechanism 10 configured as described above, in the initial state, the actuators 13 are in the same length, and the top plate 12 that supports the seat cushion 3 is on the floor F. The base plate 11 is held in a substantially horizontal posture. The connecting mechanism 10 described above is input from the controller 14 described above by connecting the actuators 13 described above to form a parallel mechanism with 6 degrees of freedom between the top plate 12 and the base plate 11 described above. The support angle and the support position of the top plate 12 supported by the actuators 13 with respect to the base plate 11 can be variously changed by the individual expansion / contraction operations of the actuators 13 based on the signals.

  Specifically, the above-described connecting mechanism 10 is operated as described above by operating a joystick (not shown) provided at a predetermined location such as a door trim of the vehicle by the seated person of the seat 1 from the initial state described above. Each actuator 13 is operated and operated so as to move the top 12 (sheet 1) to a shape corresponding to the operation of the joystick described above via the controller 14.

  More specifically, for example, as shown in FIG. 4, the coupling mechanism 10 is operated so that the joystick (not shown) is shifted to the right side, whereby each actuator 13 is moved to the top 12 (seat 1). The base plate 11 is moved in such a manner that it can be expanded and contracted in parallel to the right. Similarly, the coupling mechanism 10 is operated to move the top 12 (seat 1) to the left side, or to move in the front-rear direction and the up-down direction by operating the joystick (not shown) described above. It has come to be.

  Further, the coupling mechanism 10 is operated so as to move the above-described top plate 12 (seat 1) in the operated diagonal direction by operating the above-described joystick (not shown) in the diagonal direction such as diagonally forward right. It has come to be. By such an operation, the position of the seat 1 in the front-rear direction and the left-right direction (seat position) can be easily adjusted to an appropriate position. In addition, the coupling mechanism 10 is configured so that each actuator 13 tilts the top plate 12 (seat 1) to the rear side with respect to the base plate 11 when the joystick (not shown) is tilted to the rear side. Each is designed to move in a telescopic manner. Similarly, the coupling mechanism 10 is also operated to tilt the top plate 12 (seat 1) to the front side by an operation of tilting a joystick (not shown) to the front side.

  Further, as shown in FIG. 5, the connecting mechanism 10 described above is detected by a vehicle mounting sensor (not shown) that detects a state in which a lateral G is applied to the seat 1 during cornering of the vehicle. In response to the input of the detection signal in the controller 14, each actuator 13 is moved to expand and contract so that the top plate 12 (seat 1) rotates in the cornering direction. By the turning, the seat 1 is directed in the traveling direction in which the vehicle corners, so that a seated person (for example, a driver) of the seat 1 can take a posture facing the steering. Accordingly, the seated person of the seat 1 can drive without breaking the driving posture.

<Summary>
In summary, the sheet 1 of the present embodiment has the following configuration. That is, a vehicle seat (seat 1) mounted on a vehicle floor (floor F), and six actuators (actuators) that can extend and drive the vehicle seat (seat 1) with respect to the vehicle floor (floor F) 13) having a connecting mechanism (connecting mechanism 10) that is connected to a state in which a motion of 6 degrees of freedom is possible.

  With such a configuration, the seat position of the vehicle seat (seat 1) can be arbitrarily adjusted with six degrees of freedom by the coupling mechanism (coupling mechanism 10). Therefore, the seat position can be adjusted with a high degree of freedom by a compact configuration compared to a configuration in which a plurality of adjustment mechanisms are serially assembled.

  The actuator (actuator 13) is configured by a combination of a screw (screw 13B) extending linearly and a hollow motor (hollow motor 13C) that drives the screw (screw 13B) to extend and contract in the axial direction. Thus, by using the hollow motor (hollow motor 13C) as the drive source of the actuator (actuator 13), the expansion and contraction drive of the screw (screw 13B) can be performed with a high reduction ratio and high output and high strength. it can.

<< About other examples >>
As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, the “vehicle seat” of the present invention is widely applied to not only automobile seats, but also seats applied to vehicles other than automobiles such as railways, and seats used for various vehicles such as aircraft and ships. Is something that can be done.

  Further, the actuator may have a configuration in which two divided screws arranged in a straight line are connected to each other so as to be driven to extend and contract in the axial direction by a hollow motor. Specifically, each of the divided screws is formed into a screw shape that is a reverse screw consisting of a trapezoidal single thread, and is screwed and connected to the rotor of the hollow motor from each side in the axial direction. By being driven in this way, they are moved toward or away from each other in the axial direction and moved so as to change the overall length of the actuator. However, in such a configuration, a rotation stopping structure for stopping the rotation of the stator is set so that the stator of the hollow motor does not rotate during driving and cannot transmit power. Note that there is a need. In addition, since the structure of such a hollow motor is the same as the well-known structure disclosed by literatures, such as Unexamined-Japanese-Patent No. 2015-063211, description about a detailed structure shall be abbreviate | omitted.

1 seat (vehicle seat)
2 Seat back 3 Seat cushion 10 Connection mechanism 11 Base plate 12 Top plate 13 Actuator 13A Cross joint 13B Screw 13C Hollow motor 14 Controller F Floor

Claims (2)

A vehicle seat mounted on a vehicle floor,
A vehicle seat having a connection mechanism for connecting the vehicle seat to a state in which a motion of six degrees of freedom is possible by a parallel mechanism including six actuators that can be driven to extend and contract with respect to the vehicle floor. The vehicle seat according to claim 1,
A vehicle seat in which the actuator is configured by a combination of a linearly extending screw and a hollow motor that drives the screw to extend and contract in the axial direction.

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