JP5973752B2 - Movable mechanism of sheet movable member - Google Patents

Description

  The present invention relates to a movable mechanism for a movable member of a seat, such as a seat lifting / lowering mechanism that lifts and lowers a seat cushion of a seat.

  Conventionally, a seat raising / lowering mechanism for raising and lowering a seat cushion of a seat is widely known. As this seat raising / lowering mechanism, there is one proposed in Patent Document 1, for example. This seat elevating mechanism has a rubber cushion cam fixedly provided on a pivot shaft (link joint shaft) that is rotatably supported by left and right seat cushion support members (seat legs) and linked to the seat cushion. It attaches so that it may contact | abut to the load plate provided in the lower surface of this. Thus, play between the gear between the sector gear provided on the rotation shaft and the pinion gear meshed with the sector gear and play generated at the connecting portion between the rotation shaft and the seat cushion support member can be absorbed. .

Japanese Utility Model Publication No. 6-49161

  However, in Patent Document 1, a load plate for contacting the rubber cam in addition to the rubber cam has to be provided, the number of parts is increased, and a process such as installation work of the load plate is also required. Further, since the backlash is absorbed by the elastic deformation of the rubber cam, the rubber cam sags or the like due to long-term use, making it difficult to absorb.

  Further, in Patent Document 1, for example, a rotational force is applied such that the front portion of the seat cushion connected thereto is lifted or lowered with the rear portion as an axis by applying a force that causes the seat back of the seat to tilt backward or forward. As a result, a twisting force is applied to the rotating shaft. When such a torsional force is applied, the rotating shaft is twisted while being deformed. As a result, the front part of the seat cushion is raised or lowered by the twisted amount with the rear part as an axis.

  The present invention is less likely to cause backlash at the connecting portion between the rotating shaft and the seat body even when used for a long period of time, and even if a twisting force is applied to the rotating shaft, the rotating shaft is difficult to twist. An object is to provide a movable mechanism of a movable member.

In order to solve the above problems, the present invention comprises a seat body and a long pivot shaft having both ends pivotably held by the seat body, and with the pivot of the pivot shaft, A movable mechanism of a movable member of a sheet configured to move a movable member attached to the seat body, the movable mechanism including a connecting member that connects the rotation shaft and the seat body, the connecting member, One end side is fixedly connected to a part of the sheet main body, and the other end side is rotated in a state in which a force is applied to a middle portion of both ends of the rotating shaft in a direction perpendicular to the axial direction of the rotating shaft. A pair of seat cushion support members arranged so as to be movable, the seat body being arranged to support the seat cushion so as to have a distance from each other, and the pair of seat cushion support members To be passed between each other An elongated suspension member connecting the pair of seat cushion support members, and the pivot shaft is spanned between the pair of seat cushion support members so as to be aligned with the suspension member, A part of the seat body is constituted by the suspension member, and the suspension member is constituted by an outer peripheral shape having a circular cross section, and the connecting member is a receiving recess for receiving the suspension member on the one end side. And a curved guide portion for guiding the suspension member in the receiving concave portion .

  According to this, it is possible to make the rotation shaft difficult to bend and twist with the connecting member. Therefore, even when a torsional force is applied to the rotation shaft, the rotation shaft is difficult to torsionally deform. For example, the seat cushion as a movable member supported by the seat body is prevented from rising or lowering due to the torsional deformation of the rotation shaft. be able to.

  In addition, since the rotating shaft is applied with a force in a direction perpendicular to the axial direction by the connecting member, the connecting portion between the rotating shaft, the seat body, and the seat cushion as the movable member is generated due to manufacturing tolerances. The play (clearance) can be moved in one direction so that they are always in contact with each other, and play between the two caused by play can be eliminated. In addition, since the rotating shaft is in a state in which a force is applied in a direction perpendicular to the axial direction, it is possible to reduce the possibility of backlash even during long-term use.

  Further, since the connecting member is merely connected to each of the rotating shaft and a part of the seat body, a load plate or the like is not required as in the prior art, and a simple structure can be produced at a low cost.

Further, for example, the central portion of the rotating shaft can be connected to the suspension member by the connecting member, and the bending deformation of the rotating shaft can be efficiently suppressed. In many cases, the suspension member is disposed substantially parallel to the vicinity of the rotating shaft, and the central portion of the rotating shaft can be easily connected to the suspension member by the connecting member.

Further, in a state where the connecting member is connected to the rotating shaft, the suspension member can be guided in the receiving recess of the connecting member so as to slide from the guide portion and can be received in the receiving recess. Therefore, the connecting member can be easily connected to the rotating shaft and the suspension member, for example, in a state in which a force is applied to the rotating shaft in a direction perpendicular to the axial direction, and can be easily manufactured.

  The movable mechanism of the movable member of the seat of the present invention is less likely to cause backlash of the connecting portion between the rotary shaft and the sheet main body even when used for a long period of time, and can be rotated even when a torsional force is applied to the rotary shaft. The shaft is difficult to torsionally deform.

It is a disassembled perspective view of the principal part of the sheet | seat which has the sheet | seat raising / lowering mechanism of 1st Embodiment as a movable mechanism of the movable member of the sheet | seat of this invention. It is a perspective view of the principal part of the sheet | seat which has the sheet | seat raising / lowering mechanism of 1st Embodiment of FIG. It is a side view of the principal part of the sheet | seat which has the sheet | seat raising / lowering mechanism of 1st Embodiment of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is a side view of the state which raised the front part of the seat cushion of the sheet | seat which has the seat raising / lowering mechanism of FIG. It is a disassembled perspective view of the principal part of the sheet | seat which has the sheet | seat raising / lowering mechanism of 2nd Embodiment of this invention. It is a perspective view of the principal part of the sheet | seat which has the sheet | seat raising / lowering mechanism of 2nd Embodiment. It is a side view of the principal part of the sheet | seat which has a sheet raising / lowering mechanism of 2nd Embodiment. FIG. 10 is a sectional view taken along line XX in FIG. 9. It is a side view of the state where the rear part of the seat cushion of a seat which has a seat raising and lowering mechanism of a 2nd embodiment was raised.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a main part of a seat having a seat lifting mechanism of a first embodiment as a movable mechanism of a movable member of the present invention, and FIG. 2 is a seat lifting mechanism of the first embodiment of FIG. FIG. 3 is a side view of the main part of the seat having the seat lifting mechanism of the first embodiment of FIG. 1.

  In this embodiment, the movable mechanism of the movable member is adapted to a seat for an automobile and includes a seat lifting mechanism 10 that lifts and lowers a seat cushion (movable member) 2 of the seat. The seat lifting mechanism 10 according to the first embodiment includes a seat body 1 and a seat lifting operation unit 3.

  The seat body 1 includes a lower rail 11 and an upper rail 12 as seat cushion support members that support the seat cushion 2 from below.

  The lower rail 11 is composed of a pair of left and right elongated ones. These are disposed in the left-right direction with a distance approximately the same as the width dimension of the seat cushion 2, and are fixed to the floor of the automobile.

  The upper rail 12 is composed of a pair of left and right elongated ones having substantially the same length as the lower rail 11. Each of these upper rails 12 is slidably disposed along the longitudinal direction on the upper side of each lower rail 11.

  The lower rail 11 and the upper rail 12 are each provided with a slide device (not shown) for locking and unlocking each other, and the upper rail 12 can be locked to the lower rail 11 at an arbitrary position by the slide device. The upper rail 12 can be slid with respect to the lower rail 11 by appropriately releasing the lock.

  The pair of upper rails 12 are connected to each other by a suspension member 13. The suspension member 13 is composed of a pipe, and extends in the left-right direction so as to be passed over the pair of upper rails 12 so that both ends of the suspension member 13 are provided on the upper rails 12 respectively. Fixedly connected to the bracket 14. As a result, the pair of upper rails 12 can slide together in the front-rear direction, which is the longitudinal direction of the lower rail 11, in conjunction with each other.

  The seat cushion 2 is disposed above the pair of upper rails 12, and the seat cushion 2 is supported by the pair of upper rails 12 from below.

  Specifically, the left and right sides of the rear portion of the seat cushion 2 are rotatably connected to the upper rails 12 via the rear brackets 15, thereby being supported by the upper rails 12 from below. Each of the left and right sides of the front portion of the seat cushion 2 is supported from below by the upper rail 12 via an elevating operation shaft 31 and links 35 and 36 of a seat elevating operation unit 3 described later.

  The rear end of the seat cushion 2 is connected to a seat back (not shown) which is attached to the seat body and forms a part of the seat so as to be rotatable.

  In this embodiment, the seat lifting / lowering operation unit 3 includes a front lifting / lowering operation unit 30 that lifts and lowers the front part of the seat cushion 2. The front elevating operation unit 30 includes an elevating operation shaft (rotating shaft) 31, links 35 and 36, and a connecting member 37.

  The lifting / lowering operation shaft 31 is for lifting and lowering the seat cushion 2 and is composed of a long pipe having the same length as the suspension member 13 and a diameter smaller than that of the suspension member 13. The lifting operation shaft 31 is disposed on the front side of the suspension member 13 at a predetermined distance so as to be substantially parallel to the suspension member 13, and both ends thereof are provided on the front bracket 14 of each upper rail 12. It is rotatably held by the front bracket 14 so as to be inserted into the support hole 14a.

  The lifting operation shaft 31 includes a driving force transmission portion 31 a for receiving the driving force from the driving motor 32 on the lifting operation shaft 31.

  The driving force transmitting portion 31a is fixedly disposed on the outer periphery so as to protrude radially outward from the outer periphery of the left end portion (right side in FIG. 1) of the lifting operation shaft 31.

  And this driving force transmission part 31a is connected with the drive motor 32 so that rotation transmission is possible. Specifically, the drive motor 32 is supported by the suspension member 13. The driving force transmitting portion 31 a includes a motor connecting portion 31 b at the protruding tip portion, and the motor connecting portion 31 b is connected to a drive shaft connecting screw 33 provided on the drive motor 32.

  As a result, the drive force transmission portion 31a rotates in the clockwise direction or the counterclockwise direction in FIG. 3 in accordance with the forward or reverse rotation of the drive shaft coupling screw 33 due to the operation of the drive motor 32, and the lifting operation shaft 31 rotates in the clockwise direction. Or it rotates counterclockwise.

  The link includes a left link 35 connected to the left end portion of the lifting operation shaft 31 and a right link 36 connected to the right end portion of the lifting operation shaft 31.

  The left link 35 includes two parts, a first link piece 35a and a second link piece 35b.

  The first link piece 35 a is formed of a plate-like one, and the base end portion thereof is fixedly connected to the left end portion of the lifting operation shaft 31.

  The second link piece 35b is composed of a plate-like one, and its base end is pivotally connected to the tip of the first link piece 35a, and its tip is pivotable to the left front part of the seat cushion 2. It is connected.

  The right link 36 includes a first link piece 36a and a second link piece 36b having the same configuration as each of the first link piece 35a and the second link piece 35b of the left link 35, and the left link 35 and a left and right pair.

  In the links 35 and 36 configured in this way, the tips of the first link pieces 35a and 36a rotate in the same direction together with the lifting operation shaft 31 as the lifting operation shaft 31 rotates in the clockwise direction in FIG. . And with the rotation, the front ends of the second link pieces 35b, 36b move upward to push up the front portion of the seat cushion 2.

  On the other hand, as the lifting / lowering operation shaft 31 rotates counterclockwise in FIG. 3, the tips of the first link pieces 35a and 36a rotate in the same direction together with the lifting / lowering operation shaft 31, and accordingly, the second link piece 35b. , 36b moves downward to pull down the front portion of the seat cushion 2. Thus, the seat cushion 2 moves up and down (moves) via the links 35 and 36 as the lifting operation shaft 31 rotates.

  The connecting member 37 is made of a metal plate-like body having a thickness of about 3 mm, and is disposed at the approximate center in the left-right direction (longitudinal direction) of the lifting operation shaft 31. As shown in FIGS. 4 and 5, the connecting member 37 includes a seat body connecting portion 38 connected to the suspension member 13 on the rear end side (one end side), and a lifting operation on the front end side (the other end side). An operating shaft connecting portion 39 that is rotatably connected to the shaft 31 is provided.

  The seat body connecting portion 38 includes a receiving recess 38a that receives the suspension member 13, and a guide portion 38b that guides the suspension member 13 to the receiving recess 38a when the suspension member 13 is received in the receiving recess 38a. The receiving recess 38 a is formed so as to be recessed from the upper surface in a substantially semicircular arc shape that is substantially the same shape as the outer peripheral shape of the suspension member 13, so that the lower portion of the outer periphery of the suspension member 13 can be received.

  The receiving recess 38a is fixed to the suspension member 13 by a fixing means such as welding in a state where the longitudinal central portion of the suspension member 13 is received.

  The guide portion 38b is formed in a curved shape (in this embodiment, an arc shape having a curvature radius of about 25.4 mm), and is disposed adjacent to the receiving recess 38a on the front side of the receiving recess 38a.

  The operation shaft connecting portion 39 is formed of a circular hole in a side view through which the lifting operation shaft 31 can be inserted rotatably. In this embodiment, the operating shaft connecting portion 39 includes a resin bush 39a disposed so as to be interposed between the lifting operation shaft 31 inserted through the operating shaft connecting portion 39, and is made of resin. The lifting operation shaft 31 can be smoothly rotated in the operation shaft connecting portion 39 by the bush 39a.

  Further, in this embodiment, the operation shaft connecting portion 39 is connected from the central axis O1 to the central axis O3 of the suspension member 13 in the state shown in FIG. 5 in which the seat body connecting portion 38 is fixedly connected to the suspension member 13. The distance L1 is larger than the distance L2 from the central axis O2 of the normal lifting operation shaft 31 (shown by a one-dot chain line in FIG. 5) not connected to the connecting member 37 to the central axis O3 of the suspension member 13. Is set.

  In this embodiment, the distance L1 is set to be larger by about 0.5 mm to 1.0 mm than the distance L2.

  Accordingly, in the state shown in FIG. 5 in which the seat body connecting portion 38 is connected to the suspension member 13 and the operation shaft connecting portion 39 is connected to the lifting operation shaft 31, the connecting member 37 moves up and down the central portion of the lifting operation shaft 31. It is pressed in a direction perpendicular to the axial direction of the operation shaft 31 (in this embodiment, the front side in the W direction in the figure).

  Then, both ends of the lifting operation shaft 31 are pressed against the inner peripheral wall of the support hole 14a of the front bracket 14 by this pressing, and as a result, play due to the clearance between the lifting operation shaft 31 and the support hole 14a, The play due to the clearance between the first link piece 35a, 36a and the second link piece 35b, 36b and the play due to the clearance between the second link piece 35b, 36b and the link connecting hole provided in the seat cushion 2 are eliminated. It has become. Moreover, the center part of the raising / lowering operation axis | shaft 31 is located in the front side rather than both ends by the said press, and is in the state bent in the curved shape.

  Next, the operation of the seat lifting mechanism 10 will be described. The state shown in FIGS. 2 and 3 in which the front portion of the seat cushion 2 is lowered will be described. In this state, the play by the clearance between the lifting operation shaft 31 and the support hole 14a and the play by the clearance between the first link pieces 35a, 36a and the second link pieces 35b, 36b and the second link piece are caused by the connecting member 37. Since there is no play due to clearances between the clearances 35b and 36b and the link connection hole of the seat cushion 2, the connecting portion between the seat cushion 2 and the lifting operation shaft 31, and the lifting operation shaft 31 and the seat body 1 are also provided. There is no play in the connecting part.

  Further, for example, even when a rotational force is applied to the seat cushion 2 so that the front part is raised with the rear part at the center as the seat back is inclined, the torsional operation shaft 31 is twisted. Since the central portion of the lifting / lowering operation shaft 31 is connected to the suspension member 13, the lifting / lowering operation shaft 31 is difficult to bend and is less likely to be torsionally deformed, and the front portion of the seat cushion 2 due to the torsional deformation of the lifting / lowering operation shaft 31. Can be suppressed.

  2 and 3, the drive motor 32 is actuated by pressing the front elevation switch button (not shown) provided on the side of the seat cushion 2 and the drive shaft connecting screw 33 is rotated clockwise in FIG. To turn. Then, due to the rotation, both the driving force transmission portions 31a rotate in the same direction, and the lifting operation shaft 31 rotates in the same direction.

  Then, the front part of the seat cushion 2 is pushed up through the links 35 and 36 as shown in FIG. Then, when the pressing operation of the front raising switch button is stopped or when the drive shaft connecting screw 33 stops rotating, the lifting operation shaft 31 stops rotating and the front portion of the seat cushion 2 stops rising.

  Even in this state, the connecting member 37 causes play due to the clearance between the lifting operation shaft 31 and the support hole 14a, play due to the clearance between the first link pieces 35a and 36a and the second link pieces 35b and 36b, and the second link piece 35b. 36b and the link connecting hole 21 piece of the seat cushion 2 are free from play, so that the connecting portion between the seat cushion 2 and the lifting operation shaft 31, and the lifting operation shaft 31 and the seat body are provided. It is possible to reduce the possibility of looseness at the connecting portion.

  Further, for example, even when the seat cushion 2 is subjected to a turning force such that the front part is raised or lowered with the rear part as the center as the seat back is tilted, and the torsional operation shaft 31 is twisted. Since the central portion of the elevating operation shaft 31 is connected to the suspension member 13 by the member 37, the elevating operation shaft 31 is difficult to bend and is less likely to be torsionally deformed, and the front portion of the seat cushion 2 due to the torsional deformation of the elevating operation shaft 31 Can be prevented from rising and falling.

  On the other hand, when lowering the front portion of the seat cushion 2 from this state, the drive motor 32 is actuated by pressing a front lowering switch button (not shown) provided on the side of the seat cushion 2 to drive the drive shaft. The connecting screw 33 rotates counterclockwise in FIG. 6 in the opposite direction. Then, due to the rotation, both the driving force transmission portions 31a rotate in the same direction, and the lifting operation shaft 31 rotates in the same direction.

  The front part of the seat cushion 2 is pulled down via the links 35 and 36 by the rotation of the lifting operation shaft 31. Then, when the pressing operation of the lowering switch button is stopped or when the rotation of the drive shaft connecting screw 33 is stopped, the lifting operation shaft 31 stops rotating, and the front portion of the seat cushion 2 stops descending.

  Next, the seat raising / lowering mechanism 100 of 2nd Embodiment is demonstrated based on FIGS. The seat lifting / lowering operation unit 103 of the seat lifting / lowering mechanism 100 according to the second embodiment includes a front lifting / lowering operating unit 130 that lifts and lowers the front of the seat cushion 2, and in addition, lifts and lowers the rear part of the seat cushion 2. A rear raising / lowering operation unit 230 is provided.

  The front lifting operation unit 130 has the same configuration as the front lifting operation unit 30 of the first embodiment. Specifically, the front lifting operation unit 130 includes a front lifting operation shaft 131 and front links 135 and 136 that have the same configurations as the lifting operation shaft 31, the links 35 and 36, and the connecting member 37 of the first embodiment. And a front connecting member 137.

  The front lifting / lowering operating shaft 131 is connected to the front lifting / lowering operating shaft drive motor 132 so as to be able to transmit rotation, and is rotated by the driving force of the driving motor 132. The drive motor 132 for the front lifting operation shaft has the same configuration as the drive motor 32 of the first embodiment.

  The rear elevating operation unit 230 includes a rear elevating operation shaft 231, rear links 235 and 236, and a rear connecting member 237 in substantially the same manner as the front elevating operation unit 130.

  The rear elevating operation shaft 231 is disposed on the rear side of the suspension member 13 at a position symmetrical with the front elevating operation shaft 131 with respect to the suspension member 13, and drives for the front elevating operation shaft 131 that drives the front elevating operation shaft 131. The motor 132 is connected to a drive motor 232 for a rear raising / lowering operation shaft provided separately from the motor 132 so as to transmit rotation. The rest of the rear lifting operation shaft 231 has the same configuration as that of the front lifting operation shaft 131. Also, the drive motor 232 for the rear lifting operation shaft has the same configuration as the drive motor 132 for the front lifting operation shaft.

  The rear link includes a left rear link 235 connected to the left end of the rear lifting operation shaft 231 and a right rear link 236 connected to the right end of the rear lifting operation shaft 231.

  The left rear link 235 includes two parts, a first rear link piece 235a and a second rear link piece 235b (shown in FIG. 9).

  The first rear link piece 235a is formed of a plate shape, and the base end portion thereof is fixedly connected to the left end portion of the rear lifting operation shaft 231.

  The second rear link piece 235b is formed of a long plate shape, and its base end is rotatably connected to the tip of the first rear link piece 235a, and the tip is connected to the left rear part of the seat cushion 2. It is pivotally connected.

  The right rear link 236 includes a first rear link piece 236c and a second rear link piece (not shown) having the same configuration as each of the first rear link piece 235a and the second rear link piece 235b of the left rear link 235. And is arranged so as to form a pair with the left rear link 235.

  The rear links 235 and 236 configured in this way are such that the tips of the first rear link pieces 235a and 236c are in the same direction as the lifting operation shaft 31 as the rear lifting operation shaft 231 rotates counterclockwise in FIG. To turn. Then, with the rotation, the tip of the second rear link piece 235b moves forward, and the movement causes the rear portion of the seat cushion 2 to move in the same direction with the connecting portion with the rear bracket 15 as the center of rotation. Turn to.

  On the other hand, the tip of the first rear link piece 235a rotates in the same direction as the rear lifting operation shaft 231 as the rear lifting operation shaft 231 rotates in the clockwise direction in FIG. 9, and accordingly, the second rear link piece. The front end of 235b moves rearward, and by this movement, the rear part of the seat cushion 2 is rotated in the clockwise direction opposite to the above with the connecting part with the rear bracket 15 as the center of rotation.

  The rear connecting member 237 has the same configuration as the front connecting member 137. However, the rear connecting member 237 is disposed in the reverse direction of the front connecting member 137, the front side is fixedly connected to the suspension member 13, and the front side is a substantially central portion of the rear lifting operation shaft 231. It is pressed to the rear side in the Y direction in FIG. 10 perpendicular to the axial direction of the rear lifting operation shaft 231.

  Then, both ends of the rear lifting operation shaft 231 are pressed against the inner peripheral wall of the support hole 14b of the front bracket 14 by this pressing, and as a result, play due to the clearance between the rear lifting operation shaft 231 and the support hole 14b, Each of the play due to the clearance between the first rear link piece 235a and the second rear link piece 235b is eliminated. Further, the central portion of the rear elevating operation shaft 231 is positioned rearward of both ends by the above-described pressing, and is bent in a curved shape. The rest of the second embodiment has the same configuration as that of the first embodiment.

  Next, the operation of the seat lifting mechanism 100 of the second embodiment will be described. The state shown in FIG. 9 in which the front and rear parts of the seat cushion 2 are lowered will be described. In this state, the front elevating operation unit 130 and the rear elevating operation unit 230 are in a state in which there is no play in the coupling portion by the front coupling member 137 and the rear coupling member 237, respectively. There is no backlash at the connecting portion between the lifting operation shafts 131 and 231 and the connecting portion between the lifting operation shafts 131 and 231 and the seat body.

  Further, even when the seat cushion 2 is subjected to a turning force such that the front part is raised or lowered with the rear part as the center, the front lifting / lowering operating shaft 131 and the rear lifting / lowering operating shaft 232 are torsionally applied. 137 and the rear connecting member 237 are connected to the suspension member 13 so that the front lifting / lowering operating shaft 131 and the rear lifting / lowering operating shaft 231 are substantially centered, so that the front lifting / lowering operating shaft 131 and the rear lifting / lowering operating shaft 231 are not easily bent. Thus, there is little risk of torsional deformation, and it is possible to suppress the front part or the rear part of the seat cushion 2 from being raised or lowered due to the torsional deformation of the front lifting operation shaft 131 and the rear lifting operation shaft 231.

  When raising the rear part of the seat cushion 2 from this state, the drive motor 232 for the rear lifting operation shaft is actuated by pressing a rear raising switch button (not shown) provided on the side of the seat cushion 2. A drive shaft connecting screw (not shown) rotates counterclockwise in FIG. Then, due to the rotation, the driving force transmission portion (not shown) of the rear lifting operation shaft 231 rotates together, and the rear lifting operation shaft 231 rotates in the same direction.

  Then, as the lifting operation shaft 231 rotates, the rear portion of the seat cushion 2 rotates in the same direction around the connecting portion with the rear bracket 15 via the rear links 235 and 236 as shown in FIG. This causes the rear part of the seat cushion 2 to rise.

  Then, when the pressing operation of the rear raising switch button is stopped or when the drive shaft connecting screw stops turning, the rear raising / lowering operation shaft 231 stops turning and the rear raising of the seat cushion 2 stops.

  Even in this state, each of the front connecting member 137 and the rear connecting member 237 eliminates the play of the connecting portion. Therefore, the connecting portion between the seat cushion 2 and the lifting operation shafts 131 and 231 and the lifting and lowering are also provided. The connection between the operation shafts 131 and 231 and the sheet main body is less likely to cause backlash.

  Further, even when the seat cushion 2 is subjected to a turning force such that the front part is raised or lowered with the rear part as the center, the front lifting / lowering operating shaft 131 and the rear lifting / lowering operating shaft 232 are torsionally applied. 137 and the rear connecting member 237 are connected to the suspension member by the substantially central portion of the front lifting / lowering operating shaft 131 and the rear lifting / lowering operating shaft 231, so the front lifting / lowering operating shaft 131 and the rear lifting / lowering operating shaft 231 are not easily bent. There is little possibility of torsional deformation, and it is possible to suppress the rise or fall of the front portion of the seat cushion 2 due to the torsional deformation of the front lifting operation shaft 131 and the rear lifting operation shaft 231.

  When lowering the rear part of the seat cushion 2 from this state, the drive motor 232 is actuated by pressing a rear lowering switch button (not shown) provided on the side of the seat cushion 2, and the lifting operation shaft 31 is On the contrary, it rotates clockwise in FIG.

  Then, by the rotation of the lifting operation shaft 231, the rear portion of the seat cushion 2 is rotated in the clockwise direction opposite to the above with the connecting portion with the rear bracket 15 as the center of rotation via the rear links 235 and 236. It rotates, and, thereby, the rear part of the seat cushion 2 falls.

  Then, when the pressing operation of the rear lowering switch button is stopped or when the rotation of the drive shaft connecting screw is stopped, the rear lifting operation shaft 231 stops rotating, and the rear portion of the seat cushion 2 stops lowering.

  In addition, when raising / lowering the front part of the seat cushion 2, it can carry out similarly to having demonstrated in previous 1st Embodiment.

  In addition, the thing of the said 1st Embodiment shall be provided with only the front raising / lowering operation part, and the thing of the said 2nd Embodiment shall be provided with the front raising / lowering operation part and the rear raising / lowering operation part. However, it is not limited to this form and can be changed as appropriate. For example, it is good also as what has only a rear raising / lowering operation part, without having a front raising / lowering operation part, and can change suitably.

  Moreover, in the said embodiment, although the connection member is connected to the approximate center of the longitudinal direction of the raising / lowering operating shaft, it is not restricted to this form, The connection position of the connecting member to the raising / lowering operating shaft is the position of the raising / lowering operating shaft. Any position in the middle portion at both ends in the longitudinal direction may be used and can be changed as appropriate.

  Moreover, in the said embodiment, although the connection member is comprised from one, it is not restricted to the thing of this form, A connection member may be comprised from multiple, and can change suitably.

  Moreover, in the said embodiment, although the raising / lowering operating shaft is driven with the driving force of a drive motor, it is not restricted to this form, For example, what rotates a raising / lowering operating shaft by hand may be changed suitably.

  In the above-described embodiment, the movable mechanism of the movable member of the seat is configured by the seat lifting mechanism that lifts and lowers the seat cushion supported by the seat body, but is not limited to this configuration and can be changed as appropriate.

  For example, the movable mechanism of the movable member of the seat can be used as a part of a seat suspension that is a cushioning device for the seat. Specifically, for example, the seat suspension includes a lower frame fixed to the floor and a seat body having an upper frame on which seat cushions as movable members are placed (attached), and the upper frame is elastically supported with respect to the lower frame. A first suspension link having a shaft portion and a link piece, and a second suspension link having a shaft portion and a link piece. Further, both ends of the shaft portion of the first suspension link are rotatably held by the upper frame, the link piece of the first suspension link is rotatably connected to the lower frame, and both ends of the shaft portion of the second suspension link are the lower portion. The link mechanism is constituted by both of them so that the link piece of the second suspension link is rotatably connected to the frame so as to be rotatably connected to the upper frame. For example, when a load is applied to the seat cushion due to the seating of the seated person, the shaft portion of the first suspension link and the shaft portion of the second suspension link rotate with respect to the seat body, and the upper frame is moved to the lower frame by the link mechanism. It is comprised so that it may descend | fall.

  The shaft portion of the first suspension link and the shaft portion of the second suspension link in the seat suspension configured as described above can be used as the rotating shaft of the present invention, and the seat cushion can be used as the movable member.

1 Seat body 2 Seat cushion (movable member)
3, 103 Seat raising / lowering operation unit 10, 100 Seat raising / lowering mechanism (movable mechanism of movable member of seat)
13 Suspension member 31, 131, 231 Elevating operation shaft (rotating shaft)
37, 137, 237 Connecting member 38a Receiving recess 38b Guide portion

Claims (1)

A sheet body and a long rotation shaft whose both ends are rotatably held by the sheet body, and a movable member attached to the sheet body is movable along with the rotation of the rotation shaft. A movable mechanism of a movable member of the sheet configured to
A connecting member connecting the rotating shaft and the seat body;
One end side of the connecting member is fixedly connected to a part of the seat body, and the other end side applies a force in a direction perpendicular to the axial direction of the rotating shaft to an intermediate portion at both ends of the rotating shaft. It is configured to be pivotally connected in the
The seat body has a pair of seat cushion support members disposed so as to be able to support the seat cushion so as to have a distance from each other, and the pair of seat cushions so as to span between the pair of seat cushion support members. A long suspension member that connects the support members together,
The pivot shaft is spanned between the pair of seat cushion support members so as to be aligned with the suspension member,
A part of the seat body is composed of the suspension member,
The suspension member is composed of a circular outer peripheral shape,
The connecting member includes, on the one end side, a receiving concave portion that receives the suspension member, and a curved guide portion that guides the suspension member in the receiving concave portion . Movable mechanism.

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