JP2015217872A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress movement of a slide rail utilizing a fixing mechanism that does not require electricity while moving a seat cushion in a longitudinal direction using a motor.SOLUTION: A vehicle seat comprises slide rails 5 allowing a seat cushion 2 to be moved in a longitudinal direction, a motor 71 that is used to move the seat cushion in the longitudinal direction, and a fixing mechanism 8 capable of suppressing movement of the slide rails. The slide rails comprise lower rails 51 and upper rails 52 that can slide relative to the lower rails. The fixing mechanism comprises locking parts 81 that are fitted to locking holes formed in the lower rails so as to allow movement of the upper rails relative to the lower rails to be suppressed and an operation lever 83 capable of operating the locking parts. Force for moving the operation lever is transmitted to the locking parts so that a state where the locking parts are fitted to the locking holes can be released.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat that can move a seat cushion in the front-rear direction using a motor.

  Conventionally, it is widely known to provide a slide rail so that the seat cushion can be moved in the front-rear direction. Further, as disclosed in Patent Document 1, a vehicle seat that can move a seat cushion back and forth using an electric motor is also known.

JP 2004-330940 A

  In the case of the vehicle seat described in Patent Document 1, electrical control is required to move the fixing mechanism used to suppress the movement of the slide rail, which is structurally complicated. In addition, the weight and the required space could increase.

  The present invention was devised in view of the above points, and a problem to be solved by the present invention is a fixing mechanism that does not require electric power while moving a seat cushion in the front-rear direction using a motor. Is to suppress the movement of the slide rail.

  In order to solve the above problems, the present invention takes the following means. First, the first invention is a seat cushion, a slide rail that allows the seat cushion to move back and forth, a motor that is used to move the seat cushion back and forth, and a fixing that can restrain the movement of the slide rail. A vehicle seat provided with a mechanism, wherein the slide rail includes a lower rail fixed to a floor and an upper rail slidable with respect to the lower rail, and the fixing mechanism is provided on the lower rail. A locking portion capable of suppressing movement of the upper rail with respect to the lower rail by fitting in the locking hole; and an operation lever capable of operating the locking portion, and a force for moving the operation lever. The vehicle seat is capable of releasing the state where the locking portion is fitted in the locking hole by transmitting to the locking portion.

  According to the first aspect of the invention, the movement of the upper rail with respect to the lower rail can be performed using a motor as a power source, and the operation of the fixing mechanism capable of suppressing the movement of the upper rail is performed using electricity. Can be done without. Therefore, when the seat cushion is moved back and forth, there is no need for the occupant to press the seat cushion, and a relatively simple configuration can be achieved.

  According to a second invention, in the first invention, the seat cushion is moved back and forth by moving the operation lever to a predetermined state beyond a position where the engagement portion is released from the engagement state of the engagement portion. A vehicle seat that is movable and is provided with a selection means that allows the operation lever to select a direction in which the seat cushion moves.

  According to the second aspect of the present invention, operations necessary for moving the upper rail can be concentrated on the operation lever. Therefore, it can be easy to perform an operation of moving the upper rail.

  According to a third invention, in the first or second invention, a control means capable of controlling the movement of the seat cushion, and a biasing means capable of biasing the latching portion so as to move in a direction in contact with the lower rail. The control means controls the movement of the motor so that the upper rail can be moved for a predetermined period after the locking portion changes from a state of not contacting the lower rail to a state of contacting the lower rail. This is a vehicle seat that can generate the following force.

  According to the third aspect of the present invention, even when the locking portion temporarily does not fit into the locking hole, it can be easy to ensure a state where the locking portion fits into the locking hole. Therefore, the movement of the upper rail relative to the lower rail can be appropriately performed by the locking portion.

  According to a fourth aspect, in the third aspect, the control means controls the movement of the motor, so that the upper rail has moved before the predetermined period for at least a part of the predetermined period. This is a vehicle seat that can generate a force to move the upper rail in the opposite direction.

  According to the fourth aspect of the present invention, even when the locking portion temporarily does not fit into the locking hole, it is possible to more effectively secure the state where the locking portion fits into the locking hole. . Therefore, the movement of the upper rail relative to the lower rail can be appropriately performed by the locking portion.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to suppress a movement of a slide rail using the fixing mechanism which does not require electric power, moving a seat cushion to the front-back direction using a motor.

It is a perspective view of the vehicle seat of the present invention. It is the conceptual diagram which showed the state which the vehicle seat of this invention is moving to the front-back direction. It is a side view of the vehicle seat of the present invention. It is a longitudinal cross-sectional view around the frame part in an Example. It is a figure which shows having changed into the state which fits from the state which two latching | locking parts are not fitting in the latching hole. It is a figure which shows having set it as the state fitted to the locking hole by moving the locking part to the front side what was in the state where one locking part did not fit in the locking hole. It is a figure which shows having set it as the state fitted to the locking hole by moving the locking part to the back side what was in the state where one locking part did not fit in the locking hole.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings as appropriate. In the present specification, directions such as the front-rear direction, the up-down direction, and the left-right direction are defined such that X shown in FIG. For example, normally, when a seated person is seated, the field of view is the front, and the occipital side that does not enter the field of view is the rear.

  The vehicle seat 1 in the present embodiment is particularly applied to a second seat of a three-row seat vehicle. The vehicle seat 1 includes a seat cushion 2 having a support surface that faces the thigh of a seated occupant, and a seat back 3 that is attached to the seat cushion 2 so as to be tiltable. The seat back 3 can be adjusted in inclination by operating the reclining lever 9. The seat cushion 2 is fixed to a slide rail 5, and the slide rail 5 is fixed to a vehicle floor F via a floor bracket 19. The slide rail 5 includes a lower rail 51 fixed to the floor F and an upper rail 52 fixed to the seat cushion 2. The upper rail 52 and the lower rail 51 are configured to be slidable, and are configured to be able to slide the seat cushion 2 in the front-rear direction. In the present specification, a part that is attached to the floor F so as not to move like the lower rail 51 is referred to as a fixed part. Further, a part that is attached to the floor F so as to be movable like the upper rail 52 is called a movable part.

  The vehicle seat 1 of the present embodiment is provided with a drive mechanism 7 that enables the seat cushion 2 to move in the front-rear direction. The drive mechanism 7 includes a motor 71, and the seat cushion 2 can be moved in the front-rear direction by moving the upper rail 52 using the power generated by the motor 71.

  Moreover, the fixing mechanism 8 which can suppress the movement of the slide rail 5 is provided. The fixing mechanism 8 operates a locking portion 81 capable of suppressing the movement of the upper rail 52 with respect to the lower rail 51 by fitting in a locking hole 82 provided in the lower rail 51, and the locking portion 81. A connecting mechanism 84 interposed between the possible operating lever 83, the locking portion 81, and the operating lever 83 is provided. The coupling mechanism 84 mechanically connects the operation lever 83 and the locking portion 81, and can transmit the force applied to the operation lever 83 to the locking portion 81 to move the locking portion 81. It is what. In the embodiment, by moving the operation lever 83, the state where the locking portion 81 is fitted to the lower rail 51 can be released.

  The vehicle seat 1 according to the present embodiment includes a drive mechanism 7 that can move the seat cushion 2. The drive mechanism 7 is provided with a motor 71 that is a power source, and the seat cushion 2 can be moved using the power provided by the motor 71. In particular, the vehicle seat 1 of the present embodiment uses a motor 71 as a power source of power for moving the upper rail 52. The motor 71 is connected to a control means (not shown) and can be controlled by the control means. More specifically, it is possible to control the starting and stopping of the motor 71 and the rotation direction of a rotating shaft (not shown) of the motor 71 using the control means. The control means includes a control device 43 that can control the movement of the machine using detection signals of various detection units.

  Next, examples of the vehicle seat 1 will be described in detail. The vehicle seat 1 according to the embodiment is configured such that a power source is an electric motor 71 and a wire 73 can be wound by a pulley 72 connected to the motor 71. One end of the wire 73 is fixed to a pulley 72 which is a part of the movable part, and the other end is fixed to a lower rail 51 which is a part of the fixed part. Since the motor 71 and the pulley 72 are fixed to the movable part, when the wire 73 is wound up by the pulley 72, a force acts on the upper rail 52. With this force, the upper rail 52 is configured to be movable with respect to the lower rail 51. The drive mechanism 7 according to the embodiment includes the motor 71, the pulley 72, and the wire 73.

  In the embodiment, two wires 73 are fixed to one lower rail 51. One wire 73 is a front wire 731 that connects the front end side of the lower rail 51 and the pulley 72, and the other wire 73 is a rear wire 732 that connects the rear end side of the lower rail 51 and the pulley 72. The wire 73 taken up by the pulley 72 is either one, but the wire 73 on the side that has not been taken up is drawn out from the pulley 72 and does not hinder the movement of the seat cushion 2.

  The motor 71 of the embodiment can switch the rotation direction of a rotating shaft (not shown). Further, the rotation direction of the pulley 72 can be switched by changing the rotation direction of the rotation shaft of the motor 71. In the drive mechanism 7 of the embodiment, it is possible to select whether to wind the front wire 731 or the rear wire 732 by selecting the rotation direction of the pulley 72. Therefore, the moving direction of the seat cushion 2 is determined by the rotation direction of the pulley 72 (see FIG. 2). In the embodiment, when the rotation of the pulley 72 is normal, it is possible to apply a force to the upper rail 52 so that the seat cushion 2 moves forward. When the rotation of the pulley 72 is reversed, it is possible to apply a force to the upper rail 52 so that the seat cushion 2 moves backward.

  The vehicle seat 1 in the embodiment includes a fixing mechanism 8 that fixes the lower rail 51 and the upper rail 52 at predetermined positions. The fixing mechanism 8 includes a locking hole 82 provided in the lower rail 51, a locking portion 81 that can be moved forward and backward with respect to the locking hole 82, an operation lever 83 that can move the locking portion 81, and an operation lever. 83 and a locking mechanism 84 that is interposed between the locking portion 81 and connects the selection means 17 and the locking portion 81. When the operation lever 83 is moved so as to rotate, the locking portion 81 can be moved (see FIGS. 3 and 4). In particular, the locking portion 81 can be extracted from the locking hole 82 by moving the end of the operation lever 83 so as to move upward. The engaging portion 81 is configured so that a biasing force is exerted by a biasing means (not shown). The urging means tries to maintain the state in which the locking portion 81 is locked with the lower rail 51. Therefore, the fixing mechanism 8 according to the embodiment can move the locking portion 81 when the operation lever 83 is moved against the urging force. Further, when the hand is released from the operation lever 83, the locking portion 81 moves so as to contact the lower rail 51 by the urging force.

  In the embodiment, there is provided a lock release detection unit 11 used to detect that the locking part 81 has been extracted from the locking hole 82 and moved to a predetermined position (see FIG. 4). The unlock detection unit 11 is configured using a limit switch which is a kind of detection switch. The limit switch is provided with a movable actuator 11a, and the actuator 11a is pressed by the locking portion 81 and moved to detect that the locking portion 81 has moved to a predetermined position. is there.

  In the embodiment, a selection means 17 capable of selecting the traveling direction of the seat cushion 2 is provided. The selection means 17 is attached to the upper surface side of the operation lever 83. In particular, the selection means 17 is attached to the front portion of the operation lever 83, and the selection means 17 can be operated with the thumb while holding the operation lever 83.

  The selection means 17 of an Example is a switch called a rocker switch or a seesaw switch. This switch is used to select one of two options. In the embodiment, the switch is used to select either the forward or backward direction in which the seat cushion 2 is moved. used. However, the seat cushion 2 does not move only by selecting this switch. Normally, the seat cushion 2 is directed toward the direction selected by the selection means 17 by detecting that the unlock detection unit 11 is unlocked. Is configured to move. Due to the above configuration, when the operation lever 83 is moved to a predetermined position, the seat cushion 2 can be moved in the direction selected by the selection means 17 (see FIG. 3).

  The operating lever 83 of the embodiment is intended to return to its original position by receiving a biasing force from a biasing means (not shown). For this reason, when the force applied to the operating lever 83 that has been moved is loosened, the locking portion 81 moves toward the lower rail 51. Incidentally, a plurality of locking holes 82 are provided at a predetermined interval with respect to the lower rail 51 (see FIGS. 5 to 7). Therefore, even if the locking portion 81 moves toward the lower rail 51, it may not fit in the locking hole 82.

  In FIG. 5, a state in which the locking portions 81, 81 provided on each of the slide rails 5, 5 arranged on the left and right sides are not fitted in the locking holes 82, 82 is indicated by a two-dot chain line. In such a case, it may be possible to move the locking portions 81, 81 to either one of the locking portions 81, 81 in the locking holes 82, 82. FIG. 5 shows that the locking portions 81, 81 are adjusted to fit into the locking holes 82, 82 by moving the locking portions 81, 81 forward. Also during this time, the locking portions 81 and 81 receive a biasing force from the biasing means. For this reason, if the latching | locking parts 81 and 81 are moved ahead, it will move so that the latching | locking parts 81 and 81 may fit in the latching holes 82 and 82 in a predetermined location.

  6 and 7, a state in which only one of the locking portions 81, 81 provided on each of the slide rails 5, 5 arranged on the left and right sides is not fitted in the locking hole 82 is indicated by a two-dot chain line. Yes. Such an event may occur due to a slight deviation or the like that occurs during manufacture of the vehicle seat 1. Even in such a case, it may be possible to make the locking portion 81 fit into the locking hole 82 by applying a force to move the locking portion 81 to either one. In FIG. 6, it is shown that the locking portion 81 is adjusted to fit into the locking hole 82 by moving the locking portion 81 forward. FIG. 7 shows that the locking portion 81 is adjusted to fit into the locking hole 82 by moving the locking portion 81 rearward.

  For example, as shown by a two-dot chain line in FIG. 6, when the locking portion 81 is not fitted in the locking hole 82, the locking portion 81 is moved to the locking hole 82 even if the locking portion 81 is moved rearward. There is a possibility that it cannot be fitted. Similarly, when the locking portion 81 is not fitted in the locking hole 82 as shown by a two-dot chain line in FIG. 7, even if the locking portion 81 is moved forward, the locking portion 81 is moved to the locking hole 82. There is a possibility that it cannot be fitted. In either case, if a force is applied to move the locking portion 81 forward and backward, a state where the locking portion 81 is not fitted in the locking hole 82 can be avoided.

  In order to make this possible, in the embodiment, control is performed by the control means using the unlock detection unit 11. In the embodiment, when the force applied to move the operation lever 83 is loosened, the locking portion 81 moves and the lock release detection portion 11 cannot be detected. After the lock release detection unit 11 stops detecting, the motor 71 stops after the motor 71 rotates for a predetermined time, and the seat cushion 2 stops. More specifically, after the unlock detection unit 11 stops detecting, the control device 43 controls the motor 71 to rotate forward for a certain time and then to reverse the motor 71 for the same time. Thus, a force is applied to move the upper rail 52 forward for a certain period of time, and then a force is applied to move the upper rail 52 backward. The upper rail 52 cannot be moved when the locking portion 81 is fitted in the locking hole 82, but is controlled so as to apply a force regardless of whether the upper rail 52 can move.

  In the embodiment, the movement of the motor 71 after the lock release detection unit 11 no longer detects is constant regardless of the selection direction by the selection means 17. In other words, even when the upper cushion 52 is moved forward and the seat cushion 2 is moved while the lock release detection unit 11 is detecting, the lock release detection unit 11 is not detected even if it is moved backward. Control is performed so that a force is applied so that the upper rail 52 is moved forward for a certain period of time, and a force is applied so that the upper rail 52 is moved backward for a certain period of time thereafter. For this reason, by loosening the force applied to move the operation lever 83, the movement of the seat cushion 2 can be stopped while the locking portion 81 is fitted in the locking hole 82 at a position close to the desired position. It has become a structure.

  The sliding range of the upper rail 52 is determined. Therefore, when the upper rail 52 reaches a predetermined location, it is necessary to stop the sliding of the upper rail 52. In the embodiment, the front end detection unit 14 capable of detecting that the upper rail 52 has reached the front end position and the rear end detection unit 15 capable of detecting that the upper rail 52 has reached the rear end position are provided. The front end detector 14 and the rear end detector 15 are formed using limit switches. The limit switch is attached to the upper rail 52, and the lower rail 51 is provided with a convex portion 49 at a position where it can come into contact with the limit switch. The vehicle seat 1 in which the motor 71 has moved and the upper rail 52 has moved can be stopped when the limit switch attached to the upper rail 52 comes into contact with the convex portion 49 provided on the lower rail 51.

  The vehicle seat 1 of the above-described embodiment includes a seat cushion 2, a slide rail 5 that enables the seat cushion 2 to move back and forth, a motor 71 that is used to move the seat cushion 2 back and forth, and a slide A vehicle seat 1 having a fixing mechanism 8 capable of suppressing the movement of the rail 5, wherein the slide rail 5 includes a lower rail 51 fixed to a floor and an upper rail 52 slidable with respect to the lower rail 51. The fixing mechanism 8 includes a locking portion 81 capable of suppressing movement of the upper rail 52 with respect to the lower rail 51 by fitting in a locking hole 82 provided in the lower rail 51, and the locking An operation lever 83 capable of operating the portion 81, and transmitting a force for moving the operation lever 83 to the locking portion 81. The locking portion 81 is vehicle seat 1 which is possible to cancel the state of fitted into the locking hole 82. Therefore, the movement of the upper rail 52 with respect to the lower rail 51 can be performed using the motor 71 as a power source, and the operation of the fixing mechanism 8 that can suppress the movement of the upper rail 52 can be performed using electricity. Can be done without. Therefore, when the seat cushion 2 is moved back and forth, there is no need for the occupant to press the seat cushion 2, and a relatively simple configuration can be achieved.

  In the vehicle seat 1 according to the embodiment, the seat cushion 2 is moved by moving the operation lever 83 to a predetermined state beyond the position where the engaging portion 81 is released from the engaging hole 82. The operation lever 83 is a vehicle seat 1 provided with selection means 17 capable of selecting the direction in which the seat cushion 2 moves. For this reason, it may be possible to consolidate operations necessary for moving the upper rail 52 into the operation lever 83. Therefore, it can be easy to perform an operation of moving the upper rail 52.

  Further, the vehicle seat 1 of the embodiment includes a control unit capable of controlling the movement of the seat cushion 2, and a biasing unit capable of biasing the latching portion 81 so as to move in a direction in contact with the lower rail 51. The control means controls the movement of the motor 71, so that the upper rail 52 is maintained for a predetermined time after the locking portion 81 is changed from a state of not being in contact with the lower rail 51 to a state of being in contact. This is a vehicle seat 1 that can generate a force to move the vehicle. For this reason, even when the locking portion 81 is temporarily not engaged with the locking hole 82, it can be easily ensured that the locking portion 81 is engaged with the locking hole 82. Accordingly, the movement of the upper rail 52 relative to the lower rail 51 can be appropriately controlled by the locking portion 81.

  Further, in the vehicle seat 1 according to the embodiment, the control means controls the movement of the motor 71 so that the upper rail 52 is moved before the predetermined period for at least a part of the predetermined period. This is a vehicle seat 1 that can generate a force to move the upper rail 52 in a direction opposite to the direction in which the vehicle is moved. For this reason, even when the locking portion 81 temporarily does not engage with the locking hole 82, it is possible to more effectively secure the state where the locking portion 81 is engaged with the locking hole 82. . Accordingly, the movement of the upper rail 52 relative to the lower rail 51 can be appropriately controlled by the locking portion 81.

  Moreover, since the vehicle seat 1 according to the embodiment is configured to move the upper rail 52 by winding the wire 73, the vehicle seat 1 can be applied to a relatively long slide rail 5 such as a long slide rail. In addition, it is possible to suppress the operating noise, and it is possible to improve silence.

  Moreover, since the slide rail 5 used for the vehicle seat 1 according to the embodiment can be used as the slide rail 5 that is not moved by the motor 71, the complexity of the manufacturing process can be avoided.

  Further, since the operation lever 83 is attached to the approximate center of the side portion of the seat cushion 2, it is relatively easy for the seated passenger to operate the operation lever 83.

  As mentioned above, although it demonstrated using one embodiment, this invention can be implemented with other various forms besides the said embodiment. For example, the detection unit is not limited to a limit switch, and other detection means such as a proximity sensor can be employed.

  Further, in order to move the seat cushion, there is no need to wind the wire around the pulley. For example, it is possible to prepare a screw part extending in parallel with the slide rail and a nut part attached to the screw part, and to rotate the screw part or the nut part by power transmitted from a motor.

  Further, the switch of the selection means is not limited to one that selects either forward or reverse. For example, it is possible to select a state where the traveling direction is not selected.

  Further, the control device does not have to be a control device that controls only the vehicle seat. For example, it may serve to control other devices of the vehicle. The control device may be fixed to the vehicle seat, or may be fixed to a vehicle body to which the vehicle seat is attached.

  The present invention can be applied not only to a three-row seat vehicle, but also to a two-row seat vehicle or other vehicles. Further, the present invention may be applied to a vehicle provided with a door adjacent to a seat disposed behind the vehicle seat of the present invention.

  Moreover, it is not necessary to set it as the structure which attaches two wires with respect to a pulley. A configuration in which the wire is fixed to the pulley at an intermediate position of one wire is also possible.

  Further, the operation lever does not have to be attached to the side portion of the seat cushion, and can be attached to the front side of the seat cushion.

  Further, the coupling mechanism is not limited to a mechanism that connects only the locking portion and the operation lever. For example, it is possible to connect the locking portion, the operation lever, and the reclining lever. With such a configuration, it may be possible to move the locking portion even if the reclining lever is operated.

  Further, as a control method for moving the motor for a predetermined time after the lock release detection unit stops detecting, it is not necessary to perform control so that the time for moving forward and the time for moving backward are the same. For example, it is possible to control to move to either one for a longer time. Moreover, it is not restricted only to predetermined time. For example, it may be moved until a predetermined current value is reached.

  As a method of controlling the motor to move for a predetermined period after the unlock detection unit stops detecting, it is necessary to generate a force that moves the upper rail forward and then a force that moves backward. Absent. For example, the reverse may be possible. It is also possible to control to move in the opposite direction after moving for a while in the advancing direction that was moving before the predetermined time.

  Further, the control for moving the motor for a predetermined time does not need to be controlled based on the signal from the unlock detection unit. For example, it is possible to separately provide a detection means for confirming that the locking portion has moved to a position where it comes into contact with the lower rail, and to perform control based on a signal from the detection means.

  The vehicle is not limited to a vehicle, and may be a vehicle that flies in the air such as an airplane or a helicopter, or a vehicle that moves on the sea surface or in the sea such as a ship or a submersible.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 3 Seat back 5 Slide rail 8 Fixing mechanism 11 Lock release detection part 17 Selection means 51 Lower rail 52 Upper rail 71 Motor 81 Locking part 82 Locking hole 83 Operation lever

Claims (4)

A vehicle seat including a seat cushion, a slide rail that allows the seat cushion to move back and forth, a motor that is used to move the seat cushion back and forth, and a fixing mechanism that can suppress the movement of the slide rail. There,
The slide rail includes a lower rail fixed to a floor, and an upper rail slidable with respect to the lower rail,
The fixing mechanism includes a locking portion that can suppress movement of the upper rail with respect to the lower rail by fitting in a locking hole provided in the lower rail, and an operation lever that can operate the locking portion. Has
A vehicle seat capable of releasing a state in which the locking portion is fitted in the locking hole by transmitting a force for moving the operation lever to the locking portion. The vehicle seat according to claim 1,
The seat cushion can be moved back and forth by moving the operation lever to a predetermined state beyond the position where the locking portion is released from the state where the locking portion is fitted in the locking hole, and the operation lever includes: A vehicle seat provided with selection means capable of selecting a direction in which the seat cushion moves. The vehicle seat according to claim 1 or 2,
Control means capable of controlling the movement of the seat cushion, and urging means capable of being urged so as to move in a direction in which the locking portion contacts the lower rail,
The control means controls the movement of the motor to generate a force for moving the upper rail for a predetermined period after the locking portion changes from a state where it does not contact the lower rail to a state where it comes into contact. Vehicle seats that can be used. The vehicle seat according to claim 3,
By controlling the movement of the motor by the control means, a force for moving the upper rail in a direction opposite to the direction in which the upper rail was moving before the predetermined time is applied for at least a part of the predetermined time. Vehicle seats that can be generated.

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