JP5777945B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat. Specifically, the first mechanism operated by operating the operating lever to the first predetermined position, and the second mechanism operated by operating the operating lever to the second predetermined position beyond the first predetermined position. A vehicle seat including the mechanism.

  Conventionally, in a vehicle seat, the seat back is folded forward by a turning operation of the turning lever to a predetermined position, and the seat body is raised and stored by the further turning operation of the turning lever. The structure which is made is known (patent document 1).

JP-A-9-142187

  However, in the prior art described in Patent Document 1, there is no significant change in the operation load between operating the rotating lever to a predetermined position and operating to a full stroke position exceeding the predetermined position. There is a possibility that the user intends to operate up to a predetermined position, and then operates up to a full stroke. The present invention was devised as a solution to the above-mentioned problem, and the problem to be solved by the present invention is to use different operations in an operation mechanism in which two mechanisms are operated in sequence by one operation lever. It is to make it easier.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
The first invention is operated by a first mechanism that is operated by operating the operating lever to a first predetermined position and an operation of the operating lever that reaches a second predetermined position that exceeds the first predetermined position. And a second mechanism. The power transmission relay that transmits the operating force of the operating lever to each of the mechanisms described above increases the operating load suddenly in the middle of the operation to the second predetermined position beyond the first predetermined position of the operating lever. In addition, a resistance force imparting structure is provided that imparts a sudden resistance feeling to the operation feeling of the operation lever.

  According to the first invention, the first mechanism is operated by operating the operation lever to the first predetermined position. Further, the second mechanism is operated by further operating the operation lever to the second predetermined position. At this time, the operation load is suddenly increased by the resistance applying structure in the middle of the operation to the second predetermined position beyond the first predetermined position, and a sense of moderation is added to the operation feeling. The In this way, in the operation mechanism that operates the two mechanisms in sequence by one operation lever, a sudden sense of resistance is given to the change of the operation object to give a sense of moderation, so that the operation can be used properly. It can be made easier.

  In a second aspect based on the first aspect described above, in the operation lever after the first predetermined position, the transmission of the operation force to the first mechanism is released and the operation load is reduced. It is supposed to be configured.

  According to the second aspect of the present invention, when the operation load of the operation lever is reduced after the first predetermined position, a resistance feeling (moderation) applied to the operation lever during the operation by the above-described resistance applying structure. Feeling) is more easily felt. As a result, it is possible to make it easier to selectively use the two mechanisms in order.

  The third invention has the following configuration in the second invention described above. In other words, the power transmission relay unit receives an operation input from the operation lever and rotates, an input link kicked by the input link and rotated to operate the first mechanism, and the input link kicked. And a second output link for rotating and operating the second mechanism. The first output link slides on an outer circumferential concave surface curved in an arc around the rotation axis of the input link formed in the first output link when the operation lever is operated after the first predetermined position. By doing so, it is set as the structure which escapes, without receiving transmission of the rotational force from an input link.

  According to the third invention, the input link rotates by operating the operation lever, and the first mechanism is operated by kicking the first output link by the operation up to the first predetermined position. Even if the input link is rotated by an operation after the first predetermined position of the operation lever, the rotational force of the input link slides on the outer circumferential concave surface curved in an arc shape of the first output link. It is escaped without being transmitted to the output link. With such a simple configuration, it is possible to embody a configuration in which the operation load of the operation lever is released and reduced in the operation after the first predetermined position.

It is the perspective view which showed the external appearance structure of the vehicle seat. It is the perspective view which looked at the internal structure of the vehicle seat from the vehicle outside. It is the perspective view which looked at the internal structure of the vehicle seat from the vehicle inner side. It is the side view which showed the frame structure of the vehicle outer side of the vehicle seat. It is the VV sectional view taken on the line of FIG. It is the side view which showed the state in which the seat back was tilted to the forward tilt position by operation of the release lever or the side lever. It is the side view which showed the state by which the cancellation | release lever or the side lever was further operated and the latching mechanism was cancelled | released. FIG. 8 is a side view showing a state in which the seat back is largely collapsed from the state of FIG. It is the side view which showed the frame structure inside the vehicle of the vehicle seat corresponding to the state of FIG. It is the side view which showed the state in the middle of being tilted to the forward tilt position. It is the side view which showed the state in which the seat back was tilted to the forward tilt position. It is the side view which showed the state by which the seat back was knocked down to the position. It is a disassembled perspective view of the relay part of power transmission. It is the top view which showed the initial state of the relay part of power transmission. It is the top view which showed the state by which the 1st output link was kicked by operation of the release lever or the side lever. It is the top view which showed a mode that transmission of the operating force to a 1st output link was released even if a cancellation | release lever or a side lever was further operated. It is the top view which showed the state by which the 2nd output link was kicked by the further operation of a cancellation | release lever or a side lever. It is a load-displacement diagram showing a change in operating load due to operation of a release lever or side lever.

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

  First, the configuration of the vehicle seat 1 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the vehicle seat 1 of the present embodiment is configured as a second row seat on the rear side of a passenger seat of a vehicle provided with a three row seat (not shown). The vehicle seat 1 includes a seat back 2 that serves as a backrest for a seated occupant, a seat cushion 3 that serves as a seating portion, and a headrest 4 that supports the head. As shown in FIGS. 2 to 3, the seat back 2 is a plane in which the lower ends of the left and right sides of the seat back frame 2 </ b> A that are assembled in an inverted U-shape forming the skeleton form the skeleton of the seat cushion 3, respectively. Recliner devices 5 and 5 functioning as a rotation shaft device capable of stopping rotation are connected to the rear end portions of the left and right sides of the seat cushion frame 3A assembled in a U-shape.

  The reclining devices 5 and 5 described above are normally held in a locked state in which the backrest angle of the seat back 2 with respect to the seat cushion 3 is fixed. The reclining devices 5 and 5 are locked when the release lever 6 provided on the side of the seat cushion 3 on the vehicle outer side (the side closer to the passenger door) is lifted or on the side of the seat back 2 on the vehicle outer side. Each of the side levers 7 is pushed down to a halfway position to be released. Here, the release lever 6 and the side lever 7 correspond to the “operation lever” of the present invention, respectively, and the reclining device 5 on the vehicle inner side, which will be described later, is unlocked by these operations. The “first mechanism” corresponds to the “first mechanism position” of the present invention. By releasing the locked state of the reclining devices 5 and 5 by the above operation, the seat back 2 can be tilted back and forth around the axis of the reclining devices 5 and 5. Then, when the seat back 2 is adjusted to an arbitrary tilting position, the reclining devices 5 and 5 are again returned to the locked state by urging by releasing the above-described operations, and the seat back 2 is adjusted. It will be in the state fixed to the position of the backrest angle.

  Here, as shown in FIG. 2, a spiral spring 2 </ b> A <b> 3 is hooked between a vehicle outer side portion of the seat back frame 2 </ b> A and a seat cushion frame 3 </ b> A vehicle outer side portion. The spiral spring 2A3 has an inner end that is hooked on a vehicle outer side of the seat cushion frame 3A, and an outer end coupled to the vehicle outer side of the seat back frame 2A. The letter plate 2A2 is hooked from the rear side to the one part protruding to the vehicle outer side. By this spiral spring 2A3, the seat back 2 is always in a state where an urging force is applied in a direction in which the seat back 2 rotates forward. Therefore, the seat back 2 is operated by operating the release lever 6 and the side lever 7 from the position where the user stands outside the passenger door outside the vehicle in a state where no person is seated on the vehicle seat 1. The urging force of the spiral spring 2A3 described above is pushed forward from the normal use position.

  Here, as shown in FIGS. 3 to 4, the forward rotation of the seat back 2 is caused by the stopper pin 12 </ b> B of the locking mechanism 10 provided on the inner side surface of the seat cushion frame 3 </ b> A on the vehicle outer side. It is locked at the forward tilt position shown in FIG. Here, the locking mechanism 10 corresponds to the “second mechanism” of the present invention. As the seat back 2 is tilted to the forward tilt position, as shown in FIGS. 2 and 9, it is provided on the inner side surface of the side portion of the seat cushion frame 3A on the vehicle inner side (the side far from the passenger door). When the slide release mechanism 8 is pushed and kicked (see FIGS. 10 to 11), the slide locks of the slider devices 30 and 30 provided between the vehicle seat 1 and the floor via the cable 8C are operated. The state is to be released. By this release operation, the vehicular seat 1 can slide in the vehicle front-rear direction with respect to the floor. Therefore, by sliding the vehicle seat 1 to the front side of the vehicle in this state (a state in which the seatback 2 is tilted to the forward tilt position), a wide space for passengers to get on and off the rear seats is secured. Thus, the boarding / exiting ability can be improved.

  Further, the vehicle seat 1 can be engaged by operating the release lever 6 and the side lever 7 described above with reference to FIG. 1 further from the state in which the seat back 2 shown in FIG. The locked state by the locking mechanism 10 is released, and the seat back 2 is tilted over to the large tilt position that overlaps the upper surface of the seat cushion 3 beyond the forward tilt position. Specifically, as shown in FIG. 2 to FIG. 3, the seat back 2 is largely collapsed and rotated to the outside of the L-shaped plates 2 </ b> A <b> 2 and 2 </ b> A <b> 2 coupled to the outer portions of the lower portions of the left and right sides of the seat back frame 2 </ b> A. At the position where each piece is abutted and locked to each stopper surface 3A1, 3A1 formed to project forward in a square shape at the rear upper edge of the left and right sides of the seat cushion frame 3A. It can be stopped (see FIGS. 8 and 12). When the seat back 2 is largely collapsed, the state in which the above-described slide release mechanism 8 is pushed and kicked by the seat back 2 is released, and the slider devices 30 and 30 are returned to the slide-locked state again. (See FIG. 12). As a result, the vehicle seat 1 is in a state where the seat back 2 is largely folded down and is compactly folded, so that the vehicle interior space can be expanded widely, and the back surface of the seat back 2 that has been largely collapsed is It becomes a state where it can be used as a loading surface for various luggage storages or tables, and the convenience in the passenger compartment can be improved.

  Thus, the vehicle seat 1 can tilt the seat back 2 to the forward tilt position by operating the release lever 6 and the side lever 7 to a midway position (first predetermined position). At the same time, by further operating the release lever 6 and the side lever 7 after tilting and further operating to a position beyond the intermediate position (corresponding to the “second predetermined position” of the present invention), the seat back 2 can be tilted further forward so that it can be brought to a position where it has been greatly collapsed. Next, the configuration of the release lever 6 and the side lever 7 will be described. As shown in FIG. 4, the release lever 6 is rotatably connected to a surface portion of a side frame outside the vehicle of the seat cushion frame 3 </ b> A by a connecting shaft 6 </ b> B. Specifically, the connecting shaft 6B is integrally connected to the seat cushion frame 3A, and the release lever 6 is rotatably connected to the connecting shaft 6B.

  The release lever 6 is pivotally supported by the connecting shaft 6B at a rear portion position that is directly below the seat back 2, and an arm piece serving as an operation portion extends from the pivot support portion toward the seat front side. Is formed. The release lever 6 is normally rotated in the direction in which the arm piece extending forward is turned downward by the urging force of the torsion spring 6C hooked between the release lever 6 and the connecting shaft 6B (reverse direction shown in FIG. 4). As a state of being biased in the clockwise direction), the locking piece 6A2 formed on the lower surface portion is locked at a position where it abuts on the upper surface of the locking plate 3A2 formed by cutting and raising the seat cushion frame 3A. It is supposed to be in a state. When the release lever 6 is pulled up against the urging force of the torsion spring 6C, the cable 6A connected to the release lever 6 is pulled by an operation up to the middle position (first predetermined position). As shown in FIG. 3, the release arm 5L connected to the operation shaft 5H of the reclining device 5 arranged inside the vehicle is rotated through the power transmission relay unit 20 connected to the cable 6A. Thus, the locked state of the reclining devices 5 and 5 is released.

  By this release operation, the seat back 2 is tilted to the forward tilt position and locked by the locking mechanism 10 as described above with reference to FIGS. Then, after the tilting, the release lever 6 is further pulled up (to the second predetermined position), and the cable 6A is further pulled to operate the power transmission relay unit shown in FIG. 20 is further operated, and the locking state of the locking mechanism 10 that locks the seat back 2 in the forward tilt position is released as shown in FIG. By this release operation, the seat back 2 can be tilted further forward, and the seat back 2 is brought to the large tilt position and locked at that position (see FIGS. 8 and 12). The configuration of the power transmission relay unit 20 described above will be described in detail later.

  As shown in FIG. 2, the side lever 7 is hinged to the side frame on the vehicle outer side of the seat back frame 2A so that it can be rotated in the vertical direction. It is in a state of being held in a position where it is flipped up by the biasing force of the attached spring (not shown). When the side lever 7 is pushed down against the biasing force of the spring (not shown), the cable 7A connected to the side lever 7 is operated by the operation up to the middle position (first predetermined position). As shown in FIG. 3, the tow operation is performed to rotate the release arm 5L connected to the operation shaft 5H of the reclining device 5 disposed inside the vehicle via the power transmission relay unit 20 connected to the cable 7A. Thus, the reclining devices 5 and 5 are unlocked.

  By this release operation, the seat back 2 is tilted to the forward tilt position and locked by the locking mechanism 10 as described above with reference to FIGS. After the tilting, the side lever 7 is further pushed down (operated to the second predetermined position), and the cable 7A is further pulled to operate the power transmission relay unit shown in FIG. 20 is further operated, and the locking state of the locking mechanism 10 that locks the seat back 2 in the forward tilt position is released as shown in FIG. By this release operation, the seat back 2 can be tilted further forward, and the seat back 2 is brought to the large tilt position and locked at that position (see FIGS. 8 and 12). Here, when the seat back 2 is tilted to the forward tilt position by the operation of the side lever 7 or is tilted to the large tilt position, the user holds the seat back 2 with the operation of grasping the side lever 7. While holding, the seatback 2 can be brought down to the forward tilt position or the large tilt position described above. Therefore, the falling speed of the seat back 2 can be suppressed with the hand holding the seat back 2 so that the falling speed of the seat back 2 does not become too rapid.

  Hereinafter, the structure of each mechanism mounted on the vehicle seat 1 described above will be described in detail. As shown in FIG. 1, the above-described seat back 2 has a cushion pad 2 </ b> B made of a urethane resin foam molding on the surface portion of the seat back frame 2 </ b> A shown in FIG. 2 or 3 described above. In addition, a cover 2C made of cloth is applied so as to cover the entire surface. Similarly, the seat cushion 3 is also covered with a cushion pad 3B made of a foamed foam of urethane resin on the surface portion of the seat cushion frame 3A shown in FIG. 2 and FIG. A cover 3C made of cloth is placed so as to cover it.

  First, the configuration of each reclining device 5, 5 will be described. The reclining devices 5 and 5 are arranged in symmetrical directions with each other, but the basic configuration of both is the same. Therefore, in the following, only the configuration of the reclining device 5 arranged outside the vehicle shown in FIG. 4 will be described on behalf of these. As shown in FIG. 5, the reclining device 5 includes a disc-shaped ratchet 5A that is in contact with and integrally welded to the outer surface of the side frame of the seat back frame 2A, and a side frame of the seat cushion frame 3A. A disc-shaped guide 5B that is in contact with the inner surface of the plate and is integrally welded. The ratchet 5A and the guide 5B are fitted in the axial direction and can rotate relative to each other around the same axis. In this state, the outer ring 5C is assembled so as to be prevented from coming off in the axial direction.

  The ratchet 5A and the guide 5B have two poles 5D and 5D each having an external tooth incorporated between them, and the hinge cam 5F is pivotally supported by the central portion of the guide 5B. The relative rotation is locked or released by being pressed so as to mesh with the ratchet 5A via the slide cam 5E that is slid by the 5F, or operated so as to be released from the meshed state with the ratchet 5A. It is the structure which can be switched so that.

  The hinge cam 5F is normally rotated and biased by the urging force of the spiral spring 5G hooked between the hinge cam 5F and the pawls 5D and 5D in a state of being held in mesh with the ratchet 5A. ing. Accordingly, the reclining device 5 is normally in a state in which the backrest angle of the seat back 2 is fixed in a state where the relative rotation between the ratchet 5A and the guide 5B is locked (rotation stopped state). However, the hinge cam 5F is rotated by the operation of the release lever 6 and the side lever 7 (see FIG. 1) of the operation shaft 5H inserted through the shaft center portion and integrated in the rotation direction. Thus, a rotation operation is performed against the urging force of the spiral spring 5G, and an operation of pulling back the poles 5D and 5D so as to be disengaged from the ratchet 5A is performed. Thereby, the state (locked state) in which the ratchet 5A and the guide 5B are prevented from rotating is released, and the fixed state of the backrest angle of the seat back 2 is released.

  The hinge cam 5F is returned to the state in which the pawls 5D and 5D are engaged with the ratchet 5A again by the urging force of the spiral spring 5G when the operation state of the release lever 6 and the side lever 7 is released. It comes to hold. The above is the basic structure of each reclining device 5, 5. Note that the operation shaft 5H of the reclining device 5 disposed on the vehicle outer side is integrally connected to the operation shaft 5H of the reclining device 5 disposed on the vehicle inner side via a connecting rod 5R. In conjunction with the movement of the shaft 5H that is rotated by a release arm 5L, which will be described later, both the lock / release switching operations are performed simultaneously.

  Next, the configuration of the slide release mechanism 8 will be described with reference to FIGS. As shown in FIG. 9, the slide release mechanism 8 includes an operation link 8A, a kick link 8B, and a cable 8C. The operation link 8A is rotatably connected to the inner surface of the side frame on the vehicle inner side of the seat cushion frame 3A by a connecting shaft 8A1. The kick link 8B is axially connected to the operation link 8A by a connecting shaft 8A2. The operation link 8A has a shape in which the arm piece extends in two radial directions, and is kicked by the connecting shaft 8A2 on the arm piece extending downward in the rear direction of the seat in the initial state shown in FIG. The lower end portion of 8B is rotatably connected to the shaft. Further, a cable 8C for operating a lock release arm 33 (to be described later) for releasing the slide lock state of each slider device 30, 30 is connected to the arm piece extending in the seat front direction of the operation link 8A. Yes. Here, the operation link 8A is rotatably connected to the connecting shaft 8A1, and the connecting shaft 8A1 is integrally coupled to the seat cushion frame 3A. A torsion spring 8A3 that urges the operation link 8A to rotate counterclockwise is hooked between the operation link 8A and the locking plate 3A3 formed on the seat cushion frame 3A. As a result, the operation link 8A is normally locked at a position where the arm piece extending in the rearward downward direction of the seat contacts the lower surface of the locking plate 3A3 by the biasing force of the torsion spring 8A3. It is said that.

  The kick link 8B is formed in a U-shaped curve toward the rear of the seat, and the lower end of the figure is an arm piece that extends downward in the rear of the operation link 8A by the connecting shaft 8A2. The shaft is rotatably connected. Specifically, the connecting shaft 8A2 is integrally connected to the kick link 8B, and is rotatably connected to the operation link 8A. Between the connecting shaft 8A2 and the operation link 8A, a torsion spring 8A4 for constantly biasing the kick link 8B integral with the connecting shaft 8A2 in the clockwise direction shown in the figure is hooked. As a result, the kick link 8B is normally held in a state where it is locked by pressing the U-shaped curved concave surface against the connecting shaft 8A1 which is the rotation shaft of the operation link 8A by the biasing force of the torsion spring 8A4. ing.

  A round bar-like leg pin 8B1 protruding in the axial direction is provided at the upper end of the kick link 8B in the figure. As shown in FIG. 9, in the initial state, the leg pin 8 </ b> B <b> 1 moves as the inner kick portion 2 </ b> A <b> 1 b protruding from the front lower peripheral edge portion of the seat back frame 2 </ b> A is rotated by the forward tilt rotation of the seat back 2. It is in a state where it is exposed at a position on the coming locus. As a result, the kick link 8B provided with the leg pin 8B1 is pushed and kicked by the inner kick portion 2A1b by the operation in which the seat back 2 is tilted to the forward tilt position as shown in FIGS. As shown in the figure, the connecting shaft 8A1 is used as a fulcrum and is integrally pushed with the operation link 8A via the connecting shaft 8A2 so as to be pushed clockwise in the drawing. Then, by the rotation of the operation link 8A, the cable 8C is pulled, and the unlocking arm 33 connected to each of the slider devices 30 and 30 is operated to slide the slider devices 30 and 30. The locked state is released. When the kick link 8B is pushed around by the inner kick portion 2A1b, as shown in FIG. 11, when the seat back 2 is locked at the forward tilted position, the leg pin 8B1 is a peripheral surface of the inner kick portion 2A1b. By being kept in a state where it rides up, it is held in a pushed state.

  However, as shown in FIG. 12, the kick link 8B is moved to a position where the inner kick portion 2A1b can escape from the interference with the leg pin 8B1 when the seat back 2 is pushed down to the large tilt position beyond the forward tilt position. After passing, both the torsion springs 8A3 and 8A4 return to the initial position before the rotation operation together with the operation link 8A. Thereby, the pulling operation state of the cable 8C connected to the operation link 8A is released, and the slider devices 30 and 30 are returned to the slide-locked state again. The kick link 8B returned to the initial position has a relationship in which the leg pin 8B1 is pushed and kicked again by the inner kick portion 2A1b due to the movement of the seat back 2 being greatly tilted to the original use position. Sometimes, the kick link 8B is rotated independently in the illustrated counterclockwise direction around the connecting shaft 8A2 against the biasing force of the torsion spring 8A4, and rotates in the same direction around the connecting shaft 8A1. Is not rotated together with the operation link 8A that is locked. By the single rotation of the kick link 8B, the movement of raising the seat back 2 can be released so as not to apply an excessive tensile force or bending force to the cable 8C connected to the operation link 8A.

  Here, as shown in FIGS. 2 to 3, each of the slider devices 30, 30 is provided as a pair on the left and right between the lower part of both side frames of the seat cushion frame 3 </ b> A and the floor. Each of the slider devices 30 and 30 is fixed on the floor and extended in the front-rear direction of the seat, and is fixed to the seat cushion frame 3A and assembled in a state in which it can slide back and forth with respect to the lower rail 31. An upper rail 32 and a lock claw (not shown) that is provided on the upper rail 32 and locks the slide of the upper rail 32 by engagement with the lower rail 31. Each of the lock claws (not shown) is normally held in a state in which the slide of the upper rail 32 is locked by engaging with the lower rail 31 by the urging force of a spring (not shown) hooked between the upper rail 32 and the upper rail 32. By being operated to rotate against the urging force, the slide rail is released from the engagement with the lower rail 31 to release the above-described slide lock state.

  Each of the lock claws (not shown) is connected integrally with a connecting rod 34 between them, so that the operation of unlocking each other is performed synchronously. A lock release arm 33 is integrally coupled to an end portion of the connecting rod 34 on the vehicle inner side, and the cable 8C is connected with the operation of the slide release mechanism 8 accompanying the forward rotation of the seat back 2 described above. The lock release arm 33 is rotated through the connecting rod 34, and the lock claws are rotated through the connecting rod 34, so that the slide lock state of the slider devices 30 and 30 is released.

  Next, the configuration of the locking mechanism 10 will be described with reference to FIGS. 2 to 4 and FIGS. 6 to 8. As shown in FIG. 4, the locking mechanism 10 includes a support arm 11, a stopper arm 12, and an operation arm 13. As shown in FIG. 3, the support arm 11 and the stopper arm 12 are arranged on the inner surface of the side frame outside the vehicle of the seat cushion frame 3A, and the operation arm 13 is connected to the seat as shown in FIG. The cushion frame 3A is disposed on the outer surface of the side frame on the vehicle outer side.

  The support arm 11 and the operation arm 13 are axially coupled to the side frame of the seat cushion frame 3A so as to be integrally coupled to each other by a coupling shaft 13A. The operation arm 13 is connected to the second output cable 24D of the relay section 20 for power transmission that transmits the operation force of the release lever 6 and the side lever 7 shown in FIGS. By operating the lever 6 or the side lever 7, it is rotated in the counterclockwise direction shown in the figure via the second output cable 24D (see FIG. 7). As shown in FIG. 4, the support arm 11 has a shape that extends arm pieces in two radial directions, and the arm piece that extends forward on the sheet is a stopper of a stopper arm 12 described later. A tension spring 11 </ b> A is hooked between the arm cushion extending in the forward and downward direction of the seat and the seat cushion frame 3 </ b> A. Due to the biasing force of the tension spring 11A, the support arm 11 and the operation arm 13 integrated with the support arm 11 are normally rotated in the clockwise direction in the figure about the connecting shaft 13A. The arm piece extending in the forward and downward direction of the seat is locked at a position where it comes into contact with the rear surface of the locking plate 3A4 formed integrally with the seat cushion frame 3A.

  The stopper arm 12 is provided so as to be rotatably connected to the side frame of the seat cushion frame 3A by a connecting shaft 12A. A tension spring 12C is hooked between the stopper arm 12 and the seat cushion frame 3A. Normally, the stopper arm 12 is urged to rotate clockwise by the urging force of the tension spring 12C. A state in which a round bar-like stopper pin 12B provided protruding in the axial direction at the front end portion is locked in a state where it is pressed against the outer peripheral surface of the arm piece extending forward on the seat of the support arm 11; Has been. The force with which the stopper pin 12B is pressed against the outer peripheral surface of the arm piece of the support arm 11 is formed by the outer peripheral surface of the support arm 11 being curved in the shape of an arc drawn around the connecting shaft 13A. Further, it acts straight in the radial direction toward the connecting shaft 13A, and is supported by the connecting shaft 13A with a strong support force.

  As shown in FIG. 4, the stopper pin 12B is moved in the initial state by the forward tilting rotation of the seat back 2 by the outer kick portion 2A1a provided protruding from the front lower peripheral edge of the seat back frame 2A. It is in a state where it is exposed at a position on the coming locus. Thereby, as shown in FIG. 6, the stopper pin 12 </ b> B comes into contact with the above-described outer kick portion 2 </ b> A <b> 1 a when the seat back 2 is tilted to the forward tilt position, and the support pin 11 </ b> B is supported via the support arm 11 described above. The forward tilt rotation of the seat back 2 is locked at the forward tilt position. The locking state of the forward rotation of the seat back 2 by the stopper pin 12B is operated to the second predetermined position where the user has operated the release lever 6 and the side lever 7 which have been operated to the first predetermined position described above. It is canceled by doing.

  Specifically, as shown in FIG. 7, when each of the above operations is performed, the operation arm 13 is illustrated with the connecting shaft 13A as the center through the second output cable 24D of the power transmission relay unit 20. When the support arm 11 is rotated clockwise, the support arm 11 rotates integrally with the support arm 11 and is released from the contact state with the stopper pin 12B. At this time, the support arm 11 can be removed from the contact with the stopper pin 12B with a relatively light force because the contact surface with the stopper pin 12B is the arc surface. . By the above operation, the stopper arm 12 provided with the stopper pin 12B rotates in the clockwise direction in the figure by the urging force of the tension spring 12C, retracts to a position where it does not come into contact with the outer kick portion 2A1a, and the seat back 2 is tilted forward. The function to stop rotation at the position does not work.

  As a result, as shown in FIG. 8, the seat back 2 is tilted forward beyond the forward tilt position by the forward tilting rotational force, and is provided at the outer lower portions of the left and right sides of the seat back frame 2A. The L-shaped plates 2A2 and 2A2 are brought into the large-fall position where they abut against the stopper surfaces 3A1 and 3A1 formed on the left and right side portions of the seat cushion frame 3A and locked. The stopper arm 12 that has been retracted by further operation of the release lever 6 and the side lever 7 is initially released by the strong spring force of the tension spring 11A that overcomes the tension spring 12C when the above-described operation states are released. While being guided by the outer peripheral surface shape (inclined surface shape) of the support arm 11 returned to the position, it is returned to the original initial position state capable of the locking function shown in FIG.

  Subsequently, by using FIGS. 2 to 3 and FIGS. 13 to 17, the operating force of the release lever 6 and the side lever 7 described above, the operating force for unlocking the reclining devices 5 and 5, The configuration of the power transmission relay unit 20 that transmits as an operation force for releasing the locked state of the mechanism 10 will be described. As shown in FIGS. 2 to 3, the power transmission relay unit 20 is fixed to the seat cushion frame 3 </ b> A at a position sinking below the seating surface of the seat cushion 3. It is configured as a relay part that receives the operation force due to the operation of the lever 6 and the side lever 7 from the cables 6A and 7A connected thereto and transmits them to the reclining device 5 and the locking mechanism 10 inside the vehicle. Yes.

  Specifically, as shown in FIGS. 13 to 14, the power transmission relay unit 20 includes a base plate 21, an input link 22, a first output link 23, a second output link 24, Have The base plate 21 is integrally fixed to the seat cushion frame 3A, and the input link 22 is rotatably connected to the base plate 21 by a connecting shaft 22A. The first output link 23 and the first link The two output links 24 are both connected by a connecting shaft 25 so as to be rotatable with respect to the base plate 21 so as to be coaxial with each other. The input link 22 is rotatably connected to the connecting shaft 22 </ b> A, and the connecting shaft 22 </ b> A is integrally fixed to the base plate 21. Each of the first output link 23 and the second output link 24 is rotatably connected to the connecting shaft 25, and the connecting shaft 25 is integrally fixed to the base plate 21. Yes. The connecting shafts 22A and 25 are arranged in a direction in which the axial direction extends in the height direction of the seat cushion 3, and are arranged in parallel with each other and separated in the radial direction.

  The input link 22 is configured to extend the arm piece in two radial directions, and is always clockwise in the illustrated direction by the urging force of the torsion spring 22B hooked between the input link 22 and the connecting shaft 22A. Rotation is energized. Due to this urging force, the input link 22 is normally held at a position where the arm piece extending downward in the figure is in contact with the first stopper 21A formed on the base plate 21 in the clockwise direction in the figure. It is assumed that it is held at The cable piece 6 </ b> A connected to the release lever 6 and the cable 7 </ b> A connected to the side lever 7 are connected to the arm piece extending downward in the figure of the input link 22. In FIGS. 14 to 17, two cables 6 </ b> A and 7 </ b> A are shown as one to simplify the configuration. Thereby, the input link 22 is operated in the counterclockwise direction shown in the figure against the urging force of the torsion spring 22B via the cables 6A and 7A connected thereto when the release lever 6 or the side lever 7 is operated. It is designed to be rotated. As a result of this rotation operation, the input link 22 is moved to the first output link 23 or the second output by the kick pin 22C protruding in the axial direction provided at the end of the arm piece extending upward in the figure. The arm piece of the link 24 is kicked and pushed.

  The first output link 23 has a shape in which the arm piece extends in two radial directions. Normally, the first output link 23 is not illustrated by the urging force of the tension spring 23 </ b> C hooked between the first output link 23 and the base plate 21. It is in a state of being urged to rotate in the clockwise direction. Due to this urging force, the first output link 23 is normally held at a position where the arm piece extending downward in the figure contacts the kick pin 22C of the input link 22 and is locked. Yes. When the first output link 23 is in the initial state, the pressing surface 23 </ b> A that is brought into contact with the kick pin 22 </ b> C is extended toward the rotation center of the input link 22 (connecting shaft 22 </ b> A). A part of the lower edge surface of the arm piece extending to the left side of the link 23 in the figure is bent to the lower side in the figure. A first output cable 23D is connected to the arm piece extending to the right side of the first output link 23 in the figure. The first output cable 23D is connected to the release arm 5L connected to the operation shaft 5H of the reclining device 5 arranged on the inner side of the vehicle as described above with reference to FIG. 3, and the release arm 5L is rotated by the towing operation. By operating, the locked state of each reclining device 5, 5 is released.

  The first output link 23 shown in FIG. 14 has its pressing surface 23A pressed by the kick pin 22C by the movement in which the input link 22 is rotated counterclockwise from the initial position in the illustrated clockwise direction. (See FIG. 15). Thereby, the first output cable 23D is pulled, and the locked state of each of the reclining devices 5 and 5 (see FIG. 3) is released. Here, the lock of the reclining devices 5 and 5 is released as shown in FIG. 15 in a position on the arc surface 23B where the kick pin 22C pushes the first output link 23 and exceeds the pressing surface 23A. It is completed at a position before it is completely climbed, that is, at a mid-stage position where the kick pin 22C presses the angular surface between the pressing surface 23A and the arc surface 23B. However, even if the first output link 23 is pushed to the position where the lock of the reclining devices 5 and 5 is released, the input link 22 is further rotated by the kick pin 22C from the pressing surface 23A. The angular surface with the arc surface 23B is pressed and rotated, and the first output cable 23D is excessively pulled. With this extra operation amount setting, even if an error occurs in the assembly of the input link 22 or the first output link 23, the unlocking operation of the reclining devices 5 and 5 can be performed reliably. Here, the intermediate position of the operation of the release lever 6 and the side lever 7 for releasing the lock of the reclining devices 5 and 5 by rotating the input link 22 is the “first predetermined position” of the present invention. Equivalent to.

  When the kick pin 22C of the input link 22 is completely on the arc surface 23B of the first output link 23 by the above operation (the state shown in FIG. 16), the input link 22 is further rotated thereafter. However, as shown in FIG. 16, the first output link 23 is not kicked any more by the kick pin 22C, and is held in the operated fixed position state. Here, as shown in FIG. 15, when the first output link 23 is pushed around the arc surface 23B until the kick pin 22C of the input link 22 completely rides on the arc surface 23B, The direction of the arc surface 23B is directed to draw an arc shape around the connecting shaft 22A that is the rotation center of the input link 22. As a result, even if the input link 22 is further rotated after the kick pin 22C is on the arc surface 23B, the kick pin 22C slides on the arc surface 23B. It only moves and is held in a fixed position without being pushed by the kick pin 22C. Specifically, when the kick pin 22C is positioned on the circular arc surface 23B, the first output link 23 is moved by the kick pin 22C to return to the initial position by the urging force of the tension spring 23C. Therefore, even if the kick pin 22C moves on the arc surface 23B, the kick pin 22C is held in a certain position state that is neither pushed nor pulled. As a result, after the kick pin 22C has entered the arcuate surface 23B, the first output link 23 is rotated no matter how large the rotational movement of the input link 22 proceeds. Thus, the rotational operation force transmitted from the input link 22 is released so as not to receive an excessive load. Here, the circular arc surface 23B corresponds to the “outer peripheral concave surface” of the present invention.

  The second output link 24 has a shape that extends the arm piece in two radial directions, and is normally hooked between the connecting shaft 25 that is integrally fixed to the base plate 21. The urging force of the spiral spring 24C is in a state of being urged to rotate counterclockwise in the figure. Due to this urging force, the second output link 24 is normally locked by the arm piece extending downward in the figure in contact with the second stopper 21B formed on the base plate 21 in the counterclockwise direction in the figure. It is in a state of being held at the position. Thereby, in the initial state, the second output link 24 has a pressing surface 24A of the arm piece that extends to the front side in the drawing and is pushed and kicked by the kick pin 22C by the rotation of the input link 22 afterward. In this state, the kick pin 22C is held at a position spaced from the kick pin 22C. As shown in FIG. 14, the pressing surface 24 </ b> A has its surface facing the rotation center (the connecting shaft 22 </ b> A) of the input link 22 in the initial state, like the pressing surface 23 </ b> A of the first output arm described above. In order to extend, a part of the lower edge surface of the arm piece extending to the left side of the second output link 24 is bent to the lower side of the figure. In the initial state, the pressing surface 24A of the second output link 24 is separated from the pressing surface 23A of the first output link 23 in the counterclockwise direction shown in the drawing, which is the rotation direction of the kick pin 22C. It is said that.

  A second output cable 24 </ b> D is connected to the arm piece extending downward in the figure of the second output link 24. The second output cable 24D is connected to the operation arm 13 of the locking mechanism 10 described above with reference to FIG. 7, and the operation arm 13 is rotated by its pulling operation, so that the seat back 2 by the locking mechanism 10 is rotated. The locked state at the forward tilt position is released. Returning to FIG. 14, after the input link 22 is rotated counterclockwise in the drawing from the initial position and the first output link 23 is rotated, the kick pin 22 </ b> C is the first output link 24. As shown in FIG. 16, when the input link 22 is further rotated on the arc surface 23B of the output link 23 (see FIG. 15), the pressing surface 23A The kick pin 22C is in the applied state. Then, when the input link 22 is further rotated from there, as shown in FIG. 17, the second output link 24 is rotated in the clockwise direction in the drawing with its pressing surface 24A being pressed by the kick pin 22C. The Thereby, the second output cable 24D is pulled, and the locking state of the locking mechanism 10 (see FIG. 7) described above is released.

  Here, as shown in FIG. 17, the releasing operation of the locking state of the locking mechanism 10 is performed on the arc surface 24B where the kick pin 22C pushes around the second output link 24 and gets over the pressing surface 24A. It is completed at a position before it completely rides on the position, that is, at a mid-stage position where the kick pin 22C presses the angular surfaces of the pressing surface 24A and the arc surface 24B. However, even if the second output link 24 is pushed to the position where the locking state of the locking mechanism 10 is released, the pressing surface 24A is further slightly rotated by the kick pin 22C due to the rotation of the input link 22. And the arc surface 24B are pressed and rotated, and the second output cable 24D is excessively pulled. With this extra operation amount setting, even if an error occurs in the assembly of the input link 22 and the second output link 24, the release operation of the locking mechanism 10 can be performed reliably. Here, each operation position where the release lever 6 and the side lever 7 described above rotate the input link 22 to release the locking state of the locking mechanism 10 is the “second predetermined position” of the present invention. Equivalent to.

  When the kick pin 22C of the input link 22 is completely on the arc surface 24B of the second output link 24 by the above operation, even if the input link 22 is further rotated thereafter, the second link The output link 24 is not kicked any further by the kick pin 22C, and is held in the operated fixed position state. Here, as shown in FIG. 17, when the second output link 24 is pushed around to the position where the kick pin 22C of the input link 22 completely rides on the arc surface 24B, as shown in FIG. The direction of the arc surface 24B is directed to draw an arc shape around the connecting shaft 22A that is the rotation center of the input link 22. As a result, even if the input link 22 is further rotated after the kick pin 22C reaches the arc surface 24B, the second output link 24 slides on the arc surface 24B. It only moves and is held in a fixed position without being pushed by the kick pin 22C. Specifically, when the kick pin 22C is positioned on the circular arc surface 24B, the second output link 24 is moved by the kick pin 22C to return to the initial position by the urging force of the spiral spring 24C. Therefore, even if the kick pin 22C moves on the arc surface 24B, the kick pin 22C is held in a certain position state that is neither pushed nor pulled. As a result, after the kick pin 22C has entered the arcuate surface 24B, the second output link 24 is rotated no matter how large the rotational movement of the input link 22 proceeds. Thus, the rotational operation force transmitted from the input link 22 is released so as not to receive an excessive load.

  Therefore, by operating the release lever 6 and the side lever 7 to the midway position (first predetermined position) by the above transmission structure, the reclining devices 5 and 5 are unlocked and the seat back 2 is tilted forward. The seat can be brought into the locked state by being tilted to the position, and further, the release lever 6 and the side lever 7 are operated to the second predetermined position beyond the midway position, whereby the sheet by the locking mechanism 10 is operated. The locked state at the forward tilt position of the back 2 can be released, and the seat back 2 can be largely tilted to the position. At this time, the operation force transmitted from the input link 22 to the first output link 23 and the operation force transmitted from the input link 22 to the second output link 24 by the operation of the release lever 6 and the side lever 7 are as follows. Since the rotation operation is performed without being transmitted after the rotation operation is performed more than a certain amount, even if the rotation operation is sequentially performed as described above, the first operation is completed first. The output link 23 and the second output link 24 that can be operated later are not subjected to loads more than necessary.

  By the way, in the power transmission relay unit 20 described above, the operation of the release lever 6 and the side lever 7 causes the locking mechanism 10 to be locked from the first predetermined position where the reclining devices 5 and 5 are unlocked. The operation load of the release lever 6 and the side lever 7 is suddenly increased at a midway position until the second predetermined position for releasing the state is reached, and the operation feeling of the release lever 6 and the side lever 7 is moderated. A resistance imparting structure 20 </ b> A that provides an abrupt resistance feeling is provided. With this resistance applying structure 20A, even if the release lever 6 and the side lever 7 are operated as if they were operated to a full stroke position at once without stopping the operation halfway from the initial position, the operation target changes. Moderation in operation feeling at a halfway position (start point S2 shown in FIG. 18) between the first predetermined position (completion point C1 shown in FIG. 18) and the second predetermined position (completion point C2 shown in FIG. 18). A feeling is given and it is easy to stop the operation.

  Specifically, as shown in FIG. 16, the resistance applying structure 20A is the first region in which the input link 22 is rotated and the second output link 24 starts to be pushed around by the kick pin 22C. In this configuration, a resistance force against a sudden rotation operation is applied from the output link 24 to the input link 22 to increase the operation load. More specifically, the resistance applying structure 20A includes an element that applies a resistance force by the rising shape of the pressing surface 24A of the second output link 24 pressed by the kick pin 22C, and the second output link 24. And an element for applying a resistance force by a spiral spring 24C that applies a rotational biasing force in a direction opposite to the rotational operation direction (counterclockwise direction in the drawing). Due to these resistance elements, the operation load of the release lever 6 and the side lever 7 causes the second output link 24 to rotate after the input link 22 is rotated and the first output link 23 is rotated to the first predetermined position. Is rotated to start releasing the locked state by the locking mechanism 10 (beginning to release the support arm 11 shown in FIG. 11 from the contact state with the stopper pin 12B) toward the operation position of the peak P2 (see FIG. 18). All operating loads are set to rise sharply.

  Here, the operation load at the peak P2 shown in FIG. 18 is a peak at which the first output link 23 described above is first rotated by the resistance elements and the locked state of the reclining devices 5 and 5 starts to be released. It is higher than the operation load of P1, and the rising gradient is also set higher. Further, just before the operation load rises toward the peak P2, the operation load is such that the kick pin 22C rides on the arc surface 23B of the first output link 23 as described above with reference to FIGS. By sliding on the position, from the peak P1 at which the unlocking operation of each reclining device 5, 5 is started, toward the first predetermined position (completion point C1) where the releasing operation is completed, and the first From the predetermined position (completion point C1) to the starting point S2 at which the second output link 24 starts to rotate further, it gradually decreases greatly. As described above, since the resistance force that suddenly increases greatly is applied after the operation load is greatly reduced, the peak operation P2 starts from the start point S2 to the release operation of the locking mechanism 10. The operation load can be increased greatly more rapidly, and a great resistance feeling can be given to the operation feeling of the release lever 6 and the side lever 7. Therefore, the user can easily stop the operation of the release lever 6 and the side lever 7 at the position of the start point S2 where a sudden great resistance is given.

  Further, the release operation of the locking mechanism 10 described above is started by operating the release lever 6 and the side lever 7 operated up to the start point S2 with a large force exceeding the operation load of the peak P2 from the start point S2. The unlocking operation of the locking mechanism 10 is completed by operating to the completion point C2, which is the second predetermined position described above. At this time, the operation load from the peak P2 to the completion point C2 gradually decreases greatly as the kick pin 22C slides on the position on the arc surface 24B of the second output link 24. After the peak P2 at which the release operation begins to be started, the release lever 6 and the side lever 7 are relatively moved to the predetermined full stroke position beyond the completion point C2 where the operation load is gradually reduced. It can be operated with light force.

  Thus, according to the configuration of the vehicle seat 1 of the present embodiment, each reclining device 5 is operated by operating the release lever 6 and the side lever 7 to the first predetermined position (the completion point C1 shown in FIG. 18). , 5 is released. Further, by further operating the release lever 6 and the side lever 7 to the second predetermined position (completion point C2 shown in FIG. 18), the locking mechanism 10 is released. At this time, the release lever 6 and the side lever 7 are moved by the above-described resistance applying structure 20A at a midway position (starting point S2 shown in FIG. 18) of the operation to the second predetermined position beyond the first predetermined position. The operation load is suddenly increased, and a moderation feeling is given to the operation feeling. In this way, in the operation mechanism that operates the two mechanisms in order by one lever operation, a sudden sense of resistance is given to the change of the operation object to give a feeling of moderation, so that only one mechanism is It is possible to make it easier to properly use the operations, such as limiting to the above operations or operating both mechanisms.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, the “first mechanism” and the “second mechanism” operated by operating the “operation lever” of the present invention are not limited to the “reclining device 5” and the “locking mechanism 10” shown in the above embodiment. The operation mechanism such as various link mechanisms provided in the vehicle seat can be applied as an operation target. Further, the resistance force applying structure set in the power transmission relay portion resists the rising shape of the pressing surface 24A of the second output link 24 and the urging force of the spring (spiral spring 24C) as shown in the above embodiment. Not only the structure as an element but also a high sliding friction resistance may be set in a certain rotation region of the second output link. Further, the “operating lever” of the present invention is not limited to the rotationally operated release lever 6 and the side lever 7 set on the vehicle outer side portion of the vehicle seat as shown in the above embodiment, but other parts. And levers of various operation forms such as a slide operation type, a push button type, and a tension operation type can be adopted.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2A Seat back frame 2A1a Outer kick part 2A1b Inner kick part 2A2 L-shaped board 2A3 Spiral spring 2B Cushion pad 2C Cover 3 Seat cushion 3A Seat cushion frame 3A1 Stopper surface 3A2 Locking board 3A3 Locking board 3A4 Locking plate 3B Cushion pad 3C Cover 4 Headrest 5 Reclining device (first mechanism)
5A ratchet 5B guide 5C outer ring 5D pole 5E slide cam 5F hinge cam 5G spiral spring 5H operation shaft 5L release arm 5R connecting rod 6 release lever (operation lever)
6A Cable 6A2 Locking piece 6B Connecting shaft 6C Torsion spring 7 Side lever (control lever)
7A cable 8 slide release mechanism 8A operation link 8A1 connecting shaft 8A2 connecting shaft 8A3 torsion spring 8A4 torsion spring 8B kick link 8B1 leg pin 8C cable 10 locking mechanism (second mechanism)
DESCRIPTION OF SYMBOLS 11 Support arm 11A Tensile spring 12 Stopper arm 12A Connecting shaft 12B Stopper pin 12C Tensile spring 13 Operation arm 13A Connecting shaft 20 Power transmission relay part 20A Resistance applying structure 21 Base plate 21A First stopper 21B Second stopper 22 Input link 22A Connecting shaft 22B Torsion spring 22C Kick pin 23 First output link 23A Press surface 23B Arc surface (outer peripheral concave surface)
23C tension spring 23D first output cable 24 second output link 24A pressing surface 24B arc surface 24C spiral spring 24D second output cable 25 connecting shaft 30 slider device 31 lower rail 32 upper rail 33 lock releasing arm 34 connecting rod P1 peak P2 Peak C1 Completion point C2 Completion point S2 Start point

Claims (1)

A first mechanism operated by operating the operating lever to a first predetermined position, and a second mechanism operated by operating the operating lever to a second predetermined position beyond the first predetermined position And a vehicle seat comprising:
An operation load is suddenly applied during the operation of the operation lever to the second predetermined position beyond the first predetermined position to the power transmission relay portion that transmits the operation force of the operation lever to each mechanism. A resistance force imparting structure is provided to give a sudden sense of resistance that makes the operation feeling of the operation lever moderate and a sense of moderation ,
The operation lever is configured to reduce the operation load by releasing the transmission of the operation force to the first mechanism in the operation after the first predetermined position.
The power transmission relay unit includes an input link that rotates in response to an operation input from the operation lever, a first output link that is kicked and rotated by the input link to operate the first mechanism, and the input A second output link that is kicked by the link and rotates to operate the second mechanism, and the first output link is operated in the operation after the first predetermined position of the operation lever. The input link is slid on the outer peripheral concave surface curved in an arc shape around the rotation axis of the input link formed in the first output link, so that the input link is released without receiving the rotational force from the input link. A vehicle seat characterized by being configured .

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