JP6963391B2 - Seating device - Google Patents

Description

The present invention relates to a seating device such as a passenger seat of a vehicle.

Conventionally, as the above-mentioned seat device, a leg rest (movable part) that can rotate between a deployment position and a storage position has been used. Patent Document 1 describes a seating device that deploys and stores the leg rest by transmitting the operating force of the operating lever to the leg rest.

By the way, in order to make the operating lever lighter, it is necessary to provide a transmission mechanism between the operating lever and the leg rest so that the driving amount of the leg rest is smaller than the operating amount of the operating lever. However, in the seating device of Patent Document 1, the operating lever is rotated in only one direction to drive the leg rest. Since the rotation range of the operating lever is limited, there is a problem that the operating lever cannot be made light enough.

Japanese Unexamined Patent Publication No. 2008-29465

The present invention has been made in view of the above background, and an object of the present invention is to provide a seating device capable of moving a movable portion with a light force.

The present invention relates to a seat device including an operation unit that is rotated, a rotation shaft that is rotated by the rotation operation of the operation unit, and a movable portion that is driven by the rotational force of the rotation shaft. A transmission mechanism for transmitting a rotational force to the rotary shaft is provided, the transmission mechanism transmits a rotational force in one direction of the operation unit to the rotary shaft, and the rotational force in the other direction of the operation unit is the rotation. It is provided with a lock mechanism that does not transmit to the shaft, allows rotation of the rotating shaft in one direction, and prohibits rotation of the rotating shaft in the other direction. When the operation piece swings in one direction, it comes into contact with the main body portion, and the main body portion also rotates in one direction, and when the operation piece swings in the other direction, the operation piece is provided so as to swing freely. The lock mechanism is released by swinging in the other direction with respect to the main body.
The present invention relates to a seat device including an operation unit that is rotated, a rotation shaft that is rotated by the rotation operation of the operation unit, and a movable portion that is driven by the rotational force of the rotation shaft. A transmission mechanism for transmitting a rotational force to the rotary shaft is provided, the transmission mechanism transmits a rotational force in one direction of the operation unit to the rotary shaft, and the rotational force in the other direction of the operation unit is the rotation. The transmission mechanism does not transmit to the shaft, and the transmission mechanism engages with the first gear that rotates in conjunction with the rotating shaft when rotating, and locks on the first gear when the operating unit rotates in one direction in conjunction with the operating unit. Then, when the first gear is rotated in one direction and the operation unit is rotated in the other direction, the first locking portion is not locked to the first gear and the first gear is not rotated in the other direction. It has a ratchet structure consisting of a stopper that comes into contact with the operating portion to restrict rotation in other directions, and when the operating portion is in contact with the stopper, it comes into contact with the first locking portion. It is characterized by including a regulating portion for separating from the first gear.

The seating apparatus of the present invention, the movable portion, characterized in that it is a leg rest.

The seating apparatus of the present invention, the allowable the lock mechanism, a second gear interlocked with the rotary shaft, when the rotary shaft rotates in one direction, without engaging said second gear, the rotation of the rotary shaft It is characterized in that it has a ratchet structure including a second locking portion that locks on the second gear when the rotating shaft rotates in another direction and prohibits the rotation of the rotating shaft.

According to the present invention , the rotating shaft can be rotated in one direction and the movable portion can be driven by repeating the rotation of the operating portion in one direction and the rotation in the other direction. As a result, even if the rotation range of the operation unit is narrow, the operation amount of the operation unit can be sufficiently large compared to the drive amount of the movable part. Therefore, the operation unit can be rotated with a light force to drive the movable part. can.

Further, the transmission mechanism can be easily configured by the above ratchet structure.

The seated person operates the operation unit with the legs resting on the leg rest as the movable part. For this reason, if the operation unit is heavy, the seated person will step on the leg and apply a force in a direction that hinders the driving of the leg rest. Therefore, the operation unit becomes heavier. According to the present invention , since the operation unit can be rotated with a light force, the seated person does not have to step on the leg placed on the footrest, which is more effective.

According to the present invention , the lock mechanism prevents the rotation shaft from rotating in the other direction while the operation unit is being rotated in the other direction.

According to the present invention , the lock mechanism can be easily configured by the ratchet structure.

According to the present invention , the operation for driving the movable portion and the operation for releasing the lock mechanism can be performed by one operation piece.

According to the present invention , when the operating portion is in the contact position, the first locking portion and the first gear allow rotation of the rotating shaft in the other direction.

It is a side view which shows one Embodiment of the seat device of this invention, (A) shows the seat device when a leg rest is in the accommodating position, a seat part and a backrest is an upright position, (B) is a leg rest. Indicates the seating device when the leg rest drive mechanism is removed, with the unfolded position, seat and backrest in the reclining position. It is a perspective view of the seating apparatus shown in FIG. 1A with the cushion material removed from the front left. It is a perspective view of the seating apparatus shown in FIG. 1 (A) with the cushion material removed from the left rear view. It is a perspective view of the seating apparatus shown in FIG. 1A with the cushion material removed, as viewed from the rear right. It is a perspective view of the seat frame constituting the seat device shown in FIG. 1 (A). FIG. 3 is a perspective view of a seat frame and a leg rest drive mechanism constituting the seat device shown in FIG. 1 (A). It is a side view of the operation mechanism shown in FIG. 6 when the 3rd gear is removed and the operation lever is in the initial position. It is a side view of the operation mechanism shown in FIG. 6 when the 3rd gear is removed and the operation lever is slightly rotated in one direction. (A) is a partially enlarged view of the first locking portion and the first gear when the operating lever is rotated in one direction, and (B) is the first locking when the operating lever is rotated in the other direction. It is a partially enlarged view of a part and a 2nd gear. It is a side view of the lock mechanism shown in FIG. 4 when the lock is not released. It is a side view of the lock mechanism shown in FIG. 4 when the lock is released. (A) is a partially enlarged view of the second locking portion and the second gear when the seat frame front bar tries to rotate in the other direction, and (B) is a partially enlarged view when the seat frame front lever rotates in one direction. It is a partially enlarged view of the 2nd locking part and the 2nd gear. It is a partial side view of the operation lever shown in FIG.

Hereinafter, the seating device of the present invention will be described with reference to FIGS. 1 to 13. The top, bottom, left, right, front and back used in the following description are the top, bottom, left, right, front and back as seen from the seated person seated in the seating device.

The seat device 1 of the present embodiment is a passenger seat installed in the passenger compartment of a vehicle such as a railroad vehicle. As shown in FIG. 1 and the like, the seat device 1 includes an underframe 2, a seat portion 3, a backrest 4, a leg rest 5 as a movable portion, and a leg rest drive mechanism 6.

The underframe 2 is fixed on the turntable and supports the seat portion 3 and the backrest 4. In the present embodiment, two seats 3 and two backrests 4 are supported side by side in the left-right direction with respect to one underframe 2. Since the seats 3 and the backrests 4 arranged side by side are almost the same, one of them will be described as a representative.

The seat portion 3 and the backrest 4 are attached to the underframe 2 so as to be movable between the upright position shown in FIG. 1 (A) and the reclining position shown in FIG. 1 (B). .. The leg rest is attached to the seat portion 3 so as to be movable between the storage position shown in FIG. 1 (A) and the unfolded position shown in FIG. 1 (B). The leg rest drive mechanism 6 performs an operation of moving the leg rest 5 from the storage position to the unfolding position and an operation of moving the leg rest 5 from the unfolding position to the storage position, and transmits the operating force to the leg rest 5 to move the leg rest 5 to the leg rest 5. It is a mechanism that moves from the storage position to the unfolding position and from the unfolding position to the storage position.

As shown in FIGS. 2, 3 and 5, the underframe 2 includes a pair of underframe side pipes 21, an underframe front bar 22, an underframe rear bar 23, one seat 3 and a backrest. It has a guide plate 24 provided in pairs with respect to 4, and a guide rail 25 (FIG. 5) provided in pairs with respect to one seat portion 3 and a backrest 4.

As shown in FIGS. 2 and 3, the pair of underframe side pipes 21 are formed in a long square tubular shape, and are arranged in the longitudinal direction along the front-rear direction. The pair of underframe side pipes 21 are arranged so as to face each other in the left-right direction of the two seated persons. The underframe front bar 22 supports the underframe side pipes 21 by connecting the front ends of the pair of underframe side pipes 21 to each other. The underframe rear bar 23 supports the underframe side pipes 21 by connecting the rear ends of the pair of underframe side pipes 21 to each other.

As shown in FIG. 2 and the like, the lower end of the pair of guide plates 24 is attached to the underframe rear bar 23. The pair of guide plates 24 are provided with guide grooves 24A and 24B into which guide pins P1 and P2 projecting outward in the left-right direction from the backrest 4 and the seat portion 3, which will be described later, are inserted. By moving the guide pins P1 and P2 along the guide grooves 24A and 24B, the seat portion 3 and the backrest 4 can be moved between the upright position and the reclining position on the pair of guide plates 24. Be supported. In the upright position, the seat portion 3 is located rearward and the backrest 4 stands upright. In the reclining position, the seat portion 3 is located on the front side, and the backrest 4 is tilted down.

As shown in FIG. 5, the pair of guide rails 25 are provided side by side above the underframe front bar 22 in the left-right direction. Each of the pair of guide rails 25 is provided along the front-rear direction, and the shaft portion Z1 provided on the seat portion 3 runs on the guide rail 25 so that the seat portion 3 can move in the front-rear direction. Supported by 2.

The seat portion 3 is composed of a seat frame 31 provided so as to be movable in the front-rear direction with respect to the underframe 2, and a cushion material 32 (FIG. 1) attached to the seat frame 31. As shown in FIGS. 2 and 3, the seat frame 31 includes a pair of seat frame side plates 311 and a pair of seat frame rear bars 312 (FIG. 2) connecting the rear ends of the pair of seat frame side plates 311. It has a seat frame front bar 313 (FIG. 3) that connects the front ends of the seat frame side plates 311 to each other. The pair of seat frame side plates 311 are arranged inside the pair of guide plates 24 in the left-right direction and are arranged so as to face each other in the left-right direction. Further, as shown in FIG. 2, the pair of seat frame side plates 311 are obliquely approaching upward from the rear end of the side plate main body 311A arranged in the longitudinal direction along the front-rear direction and the rear end of the side plate main body 311A. A back frame support portion 311B that extends in the direction and supports the back frame described later, and a leg rest support portion 311C that extends from the upper side of the front end of the side plate main body portion 311A toward the front and supports the leg rest 5 described later. And have.

As shown in FIG. 5, the pair of shaft portions Z1 traveling on the guide rails 25 described above are provided so as to project inward in the left-right direction from the pair of side plate main body portions 311A. The back frame support portion 311B is provided with a through hole H1 into which a guide pin P1 projecting outward from the back frame 41 in the left-right direction is inserted. By inserting the guide pin P1 into the through hole H1, the back frame 41 is tiltably supported with respect to the seat frame 31 around the guide pin P1.

As shown in FIGS. 2 and 3, the seat frame rear bar 312 and the seat frame front bar 313 connect the pair of seat frame side plates 311 so that the longitudinal direction is along the left-right direction. The seat frame front bar 313 is rotatably attached between the pair of seat frame side plates 311.

The backrest 4 is composed of a back frame 41 that is tiltably attached to the seat frame 31 and a cushion material 42 (FIG. 1) that is attached to the back frame 41. As shown in FIG. 2, the back frame 41 has a pair of side plate portions 411 arranged between the pair of guide plates 24, an upper plate portion 412, and a central plate portion 413. The pair of side plate portions 411 are arranged to face each other in the same direction as the pair of guide plates 24, and are arranged so that the longitudinal direction is along the vertical direction. The lower ends of the pair of side plate portions 411 are overlapped with the inside of the back frame support portion 311B described above. The guide pins P1 and P2 described above are attached to these side plate portions 411 so as to project outward in the left-right direction.

The upper plate portion 412 connects the upper ends of the pair of side plate portions 411 to each other, and is arranged so that the longitudinal direction thereof is along the left-right direction. The central plate portion 413 connects the centers of the pair of side plate portions 411 to each other, and is arranged so that the longitudinal direction thereof is along the left-right direction. In the present embodiment, three central plate portions 413 are provided side by side along the vertical direction.

As shown in FIG. 1 (A), the leg rest 5 has a storage position that hangs down from the front end of the seat frame 31, and a deployment position that extends forward from the front end of the seat frame 31 as shown in FIG. 1 (B). It is attached to the seat frame 31 so as to be rotatable between the two. The leg rest 5 has a leg rest frame 51 and a cushion material 52 (FIG. 1) attached to the leg rest frame 51. As shown in FIG. 2, the leg rest frame 51 includes a pair of side frame portions 511 facing each other in the left-right direction, a connecting portion 512 connecting the pair of side frame portions 511, and a plate portion 513.

The pair of side frame portions 511 are formed in a substantially prismatic shape, and one end in the longitudinal direction is pivotally supported by the leg rest support portion 311C of the seat frame 31. As a result, the leg rest frame 51 becomes rotatable with respect to the seat frame 31. The connecting portion 512 is formed in each prismatic shape, is arranged along the left-right direction in the longitudinal direction, and both ends thereof are connected to a pair of side frame portions 511. The plate portion 513 is arranged between a pair of side frame portions 511 below the connecting portion 512 in the storage position, and is perpendicular to the front-rear direction at the storage position and vertical to the vertical direction at the unfolding position.

The leg rest drive mechanism 6 includes an operation mechanism 7, a drive mechanism 8, and a lock mechanism 9. As shown in FIG. 3, the operation mechanism 7 is one of a pair of underframe side pipes 21 (in this embodiment, the left seat device 1 is the left underframe side pipe 21 and the right seat device 1 is the right base). It is attached to the frame side pipe 21), and the rotating shaft 11 (FIGS. 7 and 8) is rotated in one direction according to the operation of the operating lever 10 as an operating unit. In this embodiment, one direction is the clockwise direction in FIG.

As shown in FIGS. 5 and 6, the drive mechanism 8 is attached to the center of the seat frame front bar 313 of the seat frame 31 and transmits the rotation of the rotation shaft 11 in one direction to the leg rest 5 to transmit the rotation of the rotation shaft 11 to the leg rest 5. Is driven from the storage position to the deployment position. As shown in FIG. 4, the lock mechanism 9 is the other of the pair of seat frame side plates 311 (in the present embodiment, the left seat device 1 is the right seat frame side plate 311 and the right seat device 1 is the left seat frame side plate 311. ), And prohibits the rotation of the rotating shaft 11 in the other direction. In the present embodiment, the other directions are the counterclockwise direction in FIG. 3 and the clockwise direction in FIG.

As shown in FIGS. 6, 7, and 8, the operation mechanism 7 rotates with an operation lever 10 that is rotated and a rotating shaft 11 (FIGS. 7 and 8) that is rotated by the rotation operation of the operation lever 10. Then, the first gear 12 as a transmission mechanism in which the rotating shaft 11 rotates in conjunction with each other, and the first gear 12 as a transmission mechanism that is locked to the first gear 12 and rotates the first gear 12 in response to the rotation operation of the operation lever 10. The first locking portion 13, the pin P3 as a regulating portion (FIGS. 7 and 8), the third gear 14 and the first rack 15 that convert the rotational force of the rotating shaft 11 into movement in the front-rear direction, and these are used. It has a support portion 16 that supports it.

The operating lever 10 is formed in a long shape, and the rotating shaft 11 is penetrated at one end thereof. The operating lever 10 is not fixed to the rotating shaft 11, but is provided so as to swing (rotate) with respect to the center of the rotating shaft 11. The operating lever 10 abuts on the first stopper S1 provided on the support portion 16 described later and the second stopper S2 as a stopper to limit the swing range, and the other ends project upward from the seat frame 31. Swing within range.

The rotating shaft 11 is rotatably supported by a support portion 16 described later so that the axial direction is along the left-right direction. A rotating shaft 11 is passed through the first gear 12. The first gear 12 is fixed to a rotating shaft 11 on the inner side in the left-right direction of the operating lever 10. When the first gear 12 rotates, the rotating shaft 11 also rotates in the same direction. As shown in FIG. 9, the teeth of the first gear 12 are provided with an inclined surface M1 on the one-way side of the top more gently than a locking surface M2 on the other direction side of the top.

As shown in FIGS. 6, 7 and 8, the first locking portion 13 is swingably attached to the inside of the operating lever 10 with its front end swinging around an axis along the left-right direction. The rear end of the first locking portion 13 projects rearward from the operating lever 10 and is located above the first gear 12. The first locking portion 13 is formed with a claw portion 13A protruding toward the teeth of the first gear 12 at the rear end thereof. The first locking portion 13 is urged in a direction in which the claw portion 13A approaches the first gear 12 by a coil spring or the like (not shown), and the claw portion 13A is in contact with the first gear 12.

As shown in FIG. 9, the claw portion 13A is provided with an end surface M3 on the front side of the top thereof at substantially the same angle as the locking surface M2 of the teeth of the first gear 12. Further, the inclined surface M4 on the rear side of the top is provided at substantially the same angle as the inclined surface M1 of the teeth of the first gear 12. As a result, as shown in FIG. 9A, when the first locking portion 13 moves in one direction, the end surface M3 of the first locking portion 13 and the locking surface M2 of the first gear 12 are locked. Then, the first gear 12 is rotated in one direction. On the other hand, as shown in FIG. 9B, when the first locking portion 13 is moved in the other direction, the claw portion 13A of the first locking portion 13 gradually comes into contact with the inclined surface M1 of the first gear 12. It is pushed up to get over the teeth of the first gear 12. Therefore, the first gear 12 and the first locking portion 13 are not locked, and the first gear 12 does not rotate.

The pin P3 is projected below the first locking portion 13. As shown in FIG. 7, the pin P3 pushes up the first locking portion 13 when the operating lever 10 is in the initial position where it comes into contact with the second stopper S2, and the pin P3 and the claw portion 13A of the first locking portion 13 Separate from the first gear 12.

As shown in FIG. 6, the third gear 14 penetrates the rotating shaft 11. The third gear 14 is fixed to the rotating shaft 11 between the first gear 12 and the operating lever 10, and when the rotating shaft 11 rotates, the third gear 14 also rotates in the same direction in conjunction with the rotation.

The first rack 15 is arranged below the third gear 14 so as to mesh with the third gear 14, and is supported by a support portion so as to be slidable in the front-rear direction. As a result, the first rack 15 moves forward when the third gear 14 rotates in one direction, and moves backward when the third gear 14 rotates in the other direction. A mounting pin P4 to which one end of the inner wire W1 of the cable C1, which will be described later, is mounted is projected on the outer side surface of the first rack 15 in the left-right direction.

As shown in FIG. 6, the support portion 16 has a first support plate 161 provided by pressing a metal plate and a second support plate 162. The first support plate 161 has a substantially rectangular bottom plate 161A that is long in the front-rear direction and a substantially rectangular standing plate 161B that is erected upward from the inner end in the left-right direction of the bottom plate 161A. .. A rotating shaft 11 is rotatably attached to the standing plate 161B. Further, the standing plate 161B is in contact with the operation lever 10 to limit the rotation of the operation lever 10 in one direction, and the first stopper S1 is in contact with the operation lever 10 to rotate the operation lever 10 in the other direction. A second stopper S2 for limiting is provided. The standing plate 161B is provided with a convex portion 161C standing upward from the rear side of the upper end thereof, and the first stopper S1 stands outward in the left-right direction from the upper side of the front end of the convex portion 161C. The second stopper S2 is erected from the upper side of the front end of the standing plate 161B to the outer side in the left-right direction.

The second support plate 162 includes a substantially rectangular bottom plate 162A extending in the front-rear direction, a substantially rectangular standing plate 162B erected upward from the inner end in the left-right direction of the bottom plate 162A, and the bottom plate 162A in the left-right direction. It has a substantially rectangular standing plate 162C standing upward from the outer end portion. The bottom plate 162A is formed with a slit SL into which the standing plate 161B of the first support plate 161 described above is inserted. When the standing plate 161B of the first support plate 161 is inserted into the slit SL, the standing plate 161B is erected from the bottom plate 162A, and the standing plates 161B and 162B are arranged at intervals in the left-right direction. The support portion 16 is fixed to the underframe side pipe 21 with the underframe side pipe 21 sandwiched between the standing plates 161B and 162B. Further, the first rack 15 is arranged on the bottom plate 162A between the standing plates 162B and 162C.

As shown in FIG. 5, the drive mechanism 8 includes a second rack 81 that moves in the front-rear direction in conjunction with the first rack 15, and a rack support portion 82 that movably supports the second rack 81 in the front-rear direction. A cable support plate 83 that supports the cable C1 that transmits the movement of the first rack 15 to the second rack 82, and a fourth gear that transmits the movement of the second rack 82 to the seat frame front bar 313 and rotates it (not shown). ), And a pair of link portions 84 (FIG. 4) that transmit the movement of the second rack 82 to the connecting portion 512 of the leg rest 5 to rotate the leg rest 5.

The second rack 81 is arranged below the seat frame front bar 313 and is supported by the rack support portion 82 so as to be movable in the front-rear direction. The rack support portion 82 is fixed to the seat frame front bar 313. The rack support portion 82 has a bottom plate 821 on which the second rack 81 is mounted, and a pair of standing plates 822 that are erected upward from both ends in the left-right direction of the bottom plate 821. The seat frame front bar 313 penetrates the pair of standing plates 822. Further, a pin (not shown) projecting inward in the left-right direction is attached to each of the pair of standing plates 822. A guide groove 81A along the front-rear direction is provided on the side surface of the second rack 81, and the pin is inserted into the guide groove 81A of the second rack 81. As a result, the second rack 81 is supported by the rack support portion 82 so as to be movable in the front-rear direction.

The other end of the inner wire W1 whose one end is attached to the first rack 15 is attached to the rack support portion 82. The cable support plate 83 is fixed to the rear end of the second rack 81 with screws or the like. The cable support plate 83 supports the other end of the outer casing OC1 of the cable C1.

The fourth gear (not shown) is penetrated through the seat frame front bar 313 and is sandwiched between the pair of standing plates 822. The fourth gear is arranged above the second rack 81 and meshes with the second rack 81. As a result, the fourth gear rotates in one direction when the second rack 81 moves forward, and rotates in the other direction when the second rack 81 moves backward. The fourth gear is fixed to the seat frame front bar 313, and when the fourth gear rotates, the seat frame front bar 313 also rotates in the same direction.

As shown in FIG. 4, the pair of link portions 84 are arranged at intervals in the left-right direction. The pair of link portions 84 are locked to the lower side of the connecting portion 512. The front end of the second rack 81 is sandwiched between the pair of link portions 84. The pair of link portions 84 rotatably support the second rack 81 about an axis along the left-right direction. As a result, when the second rack 81 moves forward, the link portion 84 rotates about the axis, the connecting portion 512 is rotated in one direction, and the leg rest 5 is lifted toward the unfolded position.

As shown in FIGS. 10 and 11, the lock mechanism 9 is locked to the second gear 91 linked to the seat frame front bar 313 and the second gear 91 to prohibit the rotation of the rotating shaft 11 in the other direction. A second locking portion 92, a coil spring Co, a link portion 93, a cable support portion 94, and a pin P5 are provided.

The seat frame front bar 313 penetrates the second gear 91. The second gear 91 is fixed to the seat frame front bar 313, and when the seat frame front bar 313 rotates, the second gear 91 also rotates in the same direction in conjunction with the rotation. As shown in FIG. 12, the teeth of the second gear 91 are provided with an inclined surface M5 in one direction from the top more gently than a locking surface M6 in the other direction than the top.

As shown in FIGS. 10 and 11, the second locking portion 92 is swingably attached with a front end centered on a shaft Z2 along the outer surface of the seat frame side plate 311 in the left-right direction. The rear end of the second locking portion 92 is located above the second gear 91. The second locking portion 92 is formed with a claw portion 92A protruding toward the teeth of the second gear 91 at the rear end thereof. As shown in FIG. 12, the claw portion 92A is provided with an end surface M7 on the rear side of the top thereof at substantially the same angle as the locking surface M6 of the teeth of the second gear 91. Further, the inclined surface M8 on the front side of the top is provided at substantially the same angle as the inclined surface M5 of the teeth of the second gear 91.

As a result, as shown in FIG. 12A, when the second gear 91 tries to rotate in the other direction, the end surface M7 of the second locking portion 92 and the locking surface M6 of the second gear 91 are locked. Therefore, the rotation of the second gear 91 in the other direction is prohibited. On the other hand, as shown in FIG. 12B, when the second gear 91 rotates in one direction, the claw portion 92A of the second locking portion 92 is gradually pushed up while sliding in contact with the inclined surface M5 of the second gear 91. , In order to get over the teeth of the second gear 91, the rotation of the second gear 91 in one direction is allowed.

As shown in FIGS. 10 and 11, one end of the coil spring Co1 is attached to the second locking portion 92, and the other end is attached to the link portion 93 described later. The coil spring Co1 urges the claw portion 92A in a direction approaching the second gear 91, and the claw portion 92A is in contact with the second gear 91.

The link portion 93 is rotatably attached to the outer surface of the seat frame side plate 311 about the axis Z3 along the left-right direction. The link portion 93 is arranged inside the second locking portion 92 in the left-right direction. A pin P5 is projected outward in the left-right direction from the link portion 93, and when the force of the cable C2 is transmitted, the pin P5 is rotated in one direction around the shaft Z3 and the pin P5 is rotated from the lock position shown in FIG. Move to the release position shown in 11. At the locked position, the pin P5 is a position where no force is applied to the second locking portion 92 and the second locking portion 92 comes into contact with the second gear 91. The release position of the pin P5 is located above the lock position. At the release position, the pin P5 pushes up the claw portion 92A of the second locking portion 92 to separate the second locking portion 92 from the second gear 91.

The link portion 93 has bifurcated portions 93A and 93B whose front side is bifurcated vertically. A shaft Z3 is provided on the lower bifurcated portion 93B. The pin P5 protrudes forward of the shaft Z3 of the bifurcated portion 93B and is arranged below the second locking portion 92. The coil spring Co1 is attached to the front end of the upper forked portion 93A.

One end of an inner wire (not shown) of the cable C2 is attached to the rear end of the link portion 93. The cable support portion 94 is attached to the seat frame side plate 311 on the rear side of the link portion 93, and one end of the outer casing OC2 of the cable C2 is attached.

The other end of the cable C2 is connected to the operating lever 10 described above. Next, the details of the operation lever 10 described in the above outline will be described. As shown in FIGS. 3, 4, 7, and 8, the operation lever 10 is operated by a lever main body 101 as a main body and an operation piece 102 swingably provided with respect to the lever main body 101. It has a coil spring Co2 (FIG. 13) that urges the piece 102 to swing in one direction. When the operation piece 102 swings in one direction with respect to the lever main body 101, it comes into contact with the lever main body 101 and also rotates the lever main body 101 in one direction. Further, when the operation piece 102 swings in the other direction, it swings in the other direction with respect to the lever main body 101 as shown by the dotted line in FIG. The swing of the operation piece 102 in the other direction is transmitted to the lock mechanism 9 by the cable C2 to release the lock between the second locking portion 92 and the second gear 91.

The lever main body 101 is provided in a plate shape vertically arranged in the left-right direction, and is divided into two parts, a first main body 101A and a second main body 101B connected in the longitudinal direction. A rotating shaft 11 is attached to the first main body 101A. The second main body 102 is attached to the end of the first main body 101 on the side away from the rotation shaft 11 in the longitudinal direction, and is attached so as to be inclined to the rear side of the first main body 101. The second main body portion 101B has a main body upper portion 101C protruding upward from the main body upper portion 101C and an operation piece support portion 101D protruding from the front of the lower end of the main body upper portion 101C. Further, as shown in FIG. 13, the second main body portion 101B is provided with a cable / coil support portion 101E that supports the cable C2 and the coil spring Co2. The outer casing OC2 of the cable C2 is supported by the cable coil support portion 101E. Further, one end of the coil spring Co2 is supported by the cable / coil support portion 101E.

As shown in FIG. 13, the operation piece 102 is a cable coil that supports an operation piece main body 102A that is operated by a seated person, a main body support portion 102B that is supported by a lever main body 101, a cable C2, and a coil spring Co2. It has a support portion 102C and a support portion 102C. The operation piece main body 102A is formed in a plate shape, and is arranged in front of the main body upper portion 101C and inside in the left-right direction so as to be orthogonal to the lever main body portion 101, as shown in FIGS. 4 and 13. As shown in FIG. 13, the main body support portion 102 projects rearward from the operation piece main body 102, is overlapped inside the operation piece support portion 101D in the left-right direction, and is rotatably attached around the shaft Z4. The cable / coil support portion 102C projects from above to the rear of the main body support portion 102B of the operation piece main body 102. An inner wire (not shown) of the cable C2 and the other end of the coil spring Co2 are attached to the cable / coil support portion 102C.

The coil spring Co2 described above is attached between the lever main body 101 and the operation piece 102 as described above, and urges the operation piece 102 to swing in one direction. As a result, as shown by the solid line in FIG. 13, the operation piece 102 is urged in a direction approaching the front end of the main body upper portion 101C and is in contact with the front end of the main body upper portion 101C.

Next, the operation of the seat device 1 having the above-described configuration will be described. First, it is assumed that the leg rest 5 is in the storage position as shown in FIG. 1 (A). When the seated person is not operating the operating lever 10, the operating piece 102 is in the initial position shown by the solid line in FIG. 7 due to the urging force of the coil spring Co2. Further, the lever main body 101 is in the initial position where it comes into contact with the second stopper S2. When the seated person operates the operation piece 102 with the upper end of the operation piece 102 directed backward, the lever body 101 is pushed by the operation piece 102 and rotates in one direction.

When the lever body 101 is rotated in one direction, it is as shown in FIG. 9 (A). The end surface M3 of the claw portion 13A of the first locking portion 13 comes into contact with the locking surface M2 of the first gear 12 to rotate the first gear 12 in one direction. When the first gear 12 rotates in one direction, the first rack 15 moves forward. The forward movement of the first rack 15 is transmitted by the cable C1, and the second rack 82 moves forward. The forward movement of the second rack 82 is transmitted to the connecting portion 512 of the leg rest 5 via the link portion 84, and the connecting portion 512 rotates in one direction. As a result, the leg rest 5 is lifted toward the deployment position.

When the second rack 82 moves forward, the third gear 14 that meshes with the second rack 82 rotates in one direction. In conjunction with the rotation of the third gear 14 in one direction, the seat frame front bar 313 to which the third gear 14 is fixed also rotates in one direction. In conjunction with the rotation of the seat frame front bar 313 in one direction, the second gear 91 of the lock mechanism 9 fixed to the seat frame front bar 313 also rotates in one direction. When the second gear 91 rotates in one direction, as shown in FIG. 12B, the claw portion 92A of the second locking portion 92 is gradually pushed up while sliding against the gently inclined surface M8 of the second gear 91. , Overcome the teeth of the first gear 91. That is, the second locking portion 92 allows the second gear 91 to rotate in one direction.

When the seated person releases his / her hand from the operating lever 10, the operating lever 10 rotates in the other direction due to the urging force of a coil spring (not shown). When the operating lever 10 is rotated in the other direction, as shown in FIG. 9B, the first locking portion 13 is gradually pushed up while sliding in contact with the gently inclined surface M1 of the first gear 12, and the first gear is pushed up. Get over 12 teeth. As a result, the rotational force of the operating lever 10 in the other direction is not transmitted to the second gear 12, so that the leg rest 5 does not return to the storage position due to the rotation of the operating lever 10 in the other direction.

Further, as described above, when the seated person releases his / her hand from the operating lever 10, the leg rest 5 tries to return to the storage position due to its own weight, and the second rack 81 tries to move backward. When the second rack 81 tries to move backward, the fourth gear (not shown) that meshes with the second rack 81 tries to rotate in the other direction, and in conjunction with this, the seat frame front bar 313 and the second gear 91 also move in the other direction. Try to rotate. When the second gear 91 rotates in the other direction, as shown in FIG. 12A, the end surface M7 of the second locking portion 92 and the locking surface M6 of the second gear 91 are locked, and the second gear is engaged. Prevent the 91 from rotating in the other direction. That is, the second locking portion 92 prohibits the rotation of the second gear 91 in the other direction. As a result, the leg rest 5 does not return to the storage position due to its own weight even if the seated person releases his / her hand from the lever.

As shown by the dotted line in FIG. 7, when the operation piece 102 is tilted forward, the operation piece 102 rotates in the other direction with respect to the lever main body 101. At this time, the lever body 101 does not rotate. The rotation of the operation piece 102 in the other direction is transmitted to the link portion 93 of the lock mechanism 9 via the cable C2, and as shown in FIG. 11, the link portion 93 rotates in the other direction. As a result, the pin P5 pushes up the second locking portion 92, and the second locking portion 92 and the second gear 91 are separated from each other. Therefore, since the second gear 91 is allowed to rotate in the other direction, the leg rest 5 returns to the storage position due to its own weight.

According to the above-described embodiment, the first gear 12 and the first locking portion 13 constituting the transmission mechanism transmit the rotational force in one direction of the operating lever 10 to the rotating shaft 11 in the other direction of the operating lever 10. The rotational force to is not transmitted to the rotating shaft 11. Therefore, by repeating the rotation of the operating lever 10 in one direction and the rotation in the other direction, the rotation shaft 11 can be rotated in one direction and the leg rest 5 can be driven. As a result, even if the rotation range of the operation lever 10 is narrow, the operation amount of the operation lever 10 can be sufficiently large compared to the drive amount of the leg rest 5, so that the operation lever 10 can be rotated with a light force to rotate the leg rest. Can be driven.

According to the above-described embodiment, the transmission mechanism can be easily configured by the ratchet structure including the first gear 12 and the first locking portion 13.

In particular, the leg rest operates the operation lever 10 with the seated person resting his / her legs on the leg rest. Therefore, if the operating lever 10 is heavy, the seated person will step on it and push the leg rest 5 back to the storage position. Therefore, the operation lever 10 becomes heavier. According to the seat device 1 of the present embodiment, since the operation lever 10 is rotated with a light force, the seated person does not have to step on the footrest with his / her legs placed on the footrest, which is more effective.

Further, according to the above-described embodiment, the lock mechanism 9 allows the rotation shaft 11 to rotate in one direction (= allows the leg rest 5 to be driven to the deployed position), and the rotation shaft 11 moves in the other direction. Rotation is prohibited (= driving of the leg rest 5 to the storage position is prohibited). As a result, the rotating shaft 11 does not rotate in the other direction and return to the deployed position while the operating lever 10 is being rotated in the other direction.

Further, according to the above-described embodiment, the lock mechanism 9 has a second gear 91 interlocked with the rotating shaft 11 and a second locking portion 92 for locking the second gear 91, and the second gear. When the rotating shaft 11 rotates in one direction, the 91 and the second locking portion 92 allow the rotating shaft 11 to rotate without the second locking portion 92 locking to the second gear 91, and the rotating shaft 11 causes the rotating shaft 11 to rotate. When rotated in the other direction, the second locking portion 92 is locked to the second gear 91, and the ratchet structure prohibits the rotation of the rotating shaft 11. Therefore, the ratchet structure can easily provide a lock mechanism 9 that allows rotation of the rotation shaft 11 in only one direction.

Further, according to the above-described embodiment, when the operation piece 102 swings in one direction, it comes into contact with the lever main body 101, and the lever main body 101 also rotates in one direction, and when it swings in the other direction, the lever main body 101 The lock mechanism 9 is released by swinging in the other direction. As a result, the operation for driving the leg rest 5 and the release operation of the lock mechanism 9 can be performed by one operation piece 102.

Further, according to the above-described embodiment, when the operating lever 10 is rotated in the other direction and returned to the initial position where it comes into contact with the second stopper S2, the pin P3 comes into contact with the first locking portion 13 and the first Separate from gear 12. As a result, when the operating lever 10 is in the initial position, the first locking portion 13 and the first gear 12 allow the rotating shaft 11 to rotate in the other direction.

According to the above-described embodiment, the long operating lever 10 is used as the operating unit, but the present invention is not limited to this. The operation unit may be in the shape of a disk as long as it can be rotated.

Further, according to the above-described embodiment, the second gear 91 is attached to the seat frame front bar 313, but the present invention is not limited to this. The second gear 91 may be interlocked with the rotating shaft 11, and may be directly attached to the rotating shaft 11 and interlocked with the second gear 91, for example.

Further, according to the above-described embodiment, the lock mechanism 9 is attached to the seat frame side plate 311 to which the operation mechanism 7 is not attached, but the present invention is not limited to this. The lock mechanism 9 may be attached to the seat frame front bar 313 between the pair of seat frame side plates 311.

Further, according to the above-described embodiment, the operation for driving the leg rest 5 and the operation for releasing the lock mechanism 9 by swingably attaching the operation piece 102 to the lever main body 101 are performed in one operation. It was possible to do it with one piece 102, but it is not limited to this. Instead of providing the operation piece 102 on the operation lever 10, a release operation unit for releasing the lock mechanism 9 may be provided at a place different from the operation lever 10.

Further, according to the above-described embodiment, the leg rest 5 is driven as a movable portion, but the present invention is not limited to this. The seat frame 31 and the back frame 41 may be used as movable parts.

Further, according to the above-described embodiment, the rotation of the rotating shaft 11 is transmitted to the leg rest 5 via the third gear 14, the first rack 15, the cable C1, and the link portion 84 to rotate the leg rest 5. However, it is not limited to this. The leg rest 5 and the first gear 12 are attached to the seat frame front bar 313 so that the seat frame front bar 313 is used as a rotation axis and the leg rest 5 attached to the leg rest 5 rotates according to the rotation of the seat frame front bar 313. You may.

The present invention is not limited to the above embodiment. That is, it can be modified in various ways without departing from the gist of the present invention.

1 Seat device 5 Leg rest (moving part)
9 Lock mechanism 10 Operation lever (operation unit)
11 Rotating shaft 12 1st gear (transmission mechanism)
13 First locking part (transmission mechanism)
91 2nd gear 92 2nd locking part 101 Lever main body (main body)
102 Operation piece P3 pin (regulator)
S2 2nd stopper (stopper)

Claims (7)

In a seat device including an operation unit to be rotated, a rotation shaft rotated by the rotation operation of the operation unit, and a movable part driven by the rotational force of the rotation shaft.
A transmission mechanism for transmitting the rotational force of the operating unit to the rotating shaft is provided.
The transmission mechanism transmits the rotational force in one direction of the operation unit to the rotation shaft, and the rotational force in the other direction of the operation unit is not transmitted to the rotation shaft.
A lock mechanism that allows rotation of the rotating shaft in one direction and prohibits rotation of the rotating shaft in the other direction is provided.
The operation unit includes a main body portion and an operation piece provided so as to be swingable with respect to the main body portion.
When the operation piece swings in one direction, it comes into contact with the main body and the main body also rotates in one direction, and when it swings in the other direction, it swings in the other direction with respect to the main body and locks. A seating device characterized by releasing the mechanism. The transmission mechanism is interlocked with a first gear that rotates in conjunction with the rotation shaft when it rotates, and locks on the first gear when the operation unit rotates in one direction, and the first gear is engaged. It has a ratchet structure including a first locking portion that rotates the gear in one direction and does not lock the first gear in the other direction when the operating portion rotates in the other direction, and does not rotate the first gear in the other direction. The seating apparatus according to claim 1. In a seat device including an operation unit to be rotated, a rotation shaft rotated by the rotation operation of the operation unit, and a movable part driven by the rotational force of the rotation shaft.
A transmission mechanism for transmitting the rotational force of the operating unit to the rotating shaft is provided.
The transmission mechanism transmits the rotational force in one direction of the operation unit to the rotation shaft, and the rotational force in the other direction of the operation unit is not transmitted to the rotation shaft.
The transmission mechanism is interlocked with a first gear that rotates in conjunction with the rotation shaft when rotated, and is locked to the first gear when the operation unit rotates in one direction, and the first gear is engaged. It has a ratchet structure consisting of a first locking portion that rotates the gear in one direction and does not lock the first gear in the other direction when the operating portion rotates in the other direction, and does not rotate the first gear in the other direction. ,
A stopper that comes into contact with the operation unit and regulates rotation in other directions,
It is provided with a regulating portion that contacts the first locking portion and separates it from the first gear when the operating portion is in contact with the stopper.
A seating device characterized by that. The seat device according to claim 3 , further comprising a lock mechanism that allows rotation of the rotating shaft in one direction and prohibits rotation of the rotating shaft in the other direction. The operation unit includes a main body portion and an operation piece provided so as to be swingable with respect to the main body portion.
When the operation piece swings in one direction, it comes into contact with the main body and the main body also rotates in one direction, and when it swings in the other direction, it swings in the other direction with respect to the main body and locks. Release the mechanism
The seating apparatus according to claim 4. The locking mechanism allows the second gear interlocking with the rotating shaft, and when the rotating shaft rotates in one direction, allows the rotating shaft to rotate without being locked to the second gear, and the rotating shaft is other than the other. It has a ratchet structure including a second locking portion that locks on the second gear when rotated in the direction and prohibits the rotation of the rotating shaft.
The seating apparatus according to any one of claims 1, 2, 4, and 5. The movable part is a leg rest
The seating apparatus according to any one of claims 1 to 6.

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