JP2007143603A - Seat reclining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mitigate regulations on a spring, to evade the fatigue of the spring, to facilitate and accelerate the assembly of a device based on the spring or the like, and to facilitate and accelerate the work of the spring or the like, while a conventional seat reclining device is configured such that a leaf spring is wound around an operation shaft passing through a locking mechanism and a casing, the leaf spring is locked to the casing and the operation shaft, the locking mechanism is locked and unlocked by rotating the operation shaft by the operation of a handle, and the leaf spring is tensed and loosened, the folding of a reclining seat solely depends on the repulsive force of the leaf spring and there is the risk that an impact at the time of folding causes an unexpected fault sometimes. <P>SOLUTION: The seat reclining device is provided with the locking mechanism B in charge of locking and unlocking a reclining mechanism and the spring 4 whose one end is fixed to a seat back frame A3 and other end is fixed to the casing of seat reclining, the spring is regulated by the movement of one end and/or the other end, the spring is tensed by moving one end and/or the other end in an opposing direction when a seat back is tilted backwards, and the spring is loosened by moving one end and/or the other end in the opposing direction when it is tilted forward. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat reclining device (including a seat tumble mechanism).

  In the conventional seat reclining device, a leaf spring is mounted on an operation shaft penetrating the lock mechanism and the casing, the leaf spring is locked to the casing and the operation shaft, and the operation shaft is operated (rotated). And the lock mechanism is locked and unlocked, and the leaf spring is tensioned and relaxed (tension release). In this configuration, the folding of the reclining sheet (referred to as a sheet) is a structure that depends exclusively on the repulsive force of the leaf spring. Therefore, the impact at the time of folding may sometimes cause an unexpected trouble. One example will be described. [1] is a problem caused by an impact, that is, the weak person such as an infant, the elderly, or a sick person is injured or feared by the impact, or the hard member provided on the seat causes damage to the weak person. In addition, it has been pointed out that damage to easily fragile items such as eyeglasses may occur, causing problems such as destruction in some cases. [2] is a problem in achieving various aspects of the seat, that is, when it is desired to quickly fold and / or stand the seat (standing at an appropriate inclination angle “standard seating position angle”) In addition, it has been pointed out that the folding and / or standing of the sheet can be performed speedily and with a speed change, and it is not always possible to accurately cope with these operations.

  As part of the solution, conventionally, an optimum configuration has been proposed as a means for complementing the strength of the spring. As an example, a configuration is adopted in which one end (one side) of a seatback return spring is regulated by operation of a lever pivotally supported on a lower arm attached to the seatback frame. As a document (1) adopting such a configuration, there is a “sheet reclining device” disclosed in JP-A-2002-101997. The present invention is intended to provide a seat reclining device that can relieve the impact when the seat back is tilted forward, and to be small and inexpensive, and is rotatably supported on the shaft of the seat back frame. An upper arm and a lower arm and / or a hook lever are provided, and one end of a spiral spring provided on the shaft is supported via the hook lever and / or a lower holder, and when the seat back frame is in a forward tilt region, Alternatively, it is configured to operate so as to avoid engagement / disengagement with the lower holder and to prevent the acting force of the spiral spring from being transmitted to the lower arm. Further, in a seat reclining device that can be in a full flat state, a configuration is adopted in which one end of a spring for seat back return is regulated by a meshing operation of a lock pawl attached to the seat back frame and a gear. As a document (2) adopting such a configuration, there is a “sheet reclining device with a table mechanism” disclosed in Japanese Patent Laid-Open No. 2001-120381. The present invention intends to provide a seat reclining device in which the seat back does not give a shock to the occupant even if the reclining lock is inadvertently released unless the table lock is released. The ratchet wheel is fixed to the center shaft of the ratchet, and the lock pawl that engages and disengages with the ratchet teeth of the ratchet wheel is pivotally supported by the intermediate plate and engaged with the cam plate that has a long hole in which the lock pawl pin can be loosely fitted. The cam plate has a center shaft rotatably arranged, and is urged clockwise by a spring (spiral spring) provided on the center shaft, and a wire provided on the cam plate is connected to a pulley. The pulley is secured to the frame of the arm plate. Characterized by tilting the arm plate via the front of the rotation. The present applicant has proposed several seat reclining devices and the like having a configuration similar to the above-mentioned document (1) and / or document (2). There are 16480 “seat reclining devices”. The outline is a configuration in which one end of a spring is locked to this casing and the other end is locked to a seat bracket frame, in a casing that is detachably provided on a lock mechanism that controls locking and unlocking of a reclining mechanism, The spring is controlled by a restricting means provided in the casing, so that a sudden forward tilt of the seat back is avoided.

JP2002-101997 JP2001-120381A JP2004-16480

  The documents (1) to (3) regulate one side of the seat back (seat back frame) so as to avoid a sudden folding (forward tilt) of the seat back, or a reliable and smooth seat. Intended to ensure movement.

  However, these inventions are configured to restrict the repulsive force of the spring at one end and exert this restriction on the entire spring, and the impact at the time of folding utilizing the tension and relaxation at one end of the spring and / or in the vicinity thereof. Absorption. Therefore, it is not always sufficient to absorb the shock when folded by the spring or to avoid various obstacles due to this shock.

  In particular, the literature (1) and / or the literature (2) employs a configuration in which various parts and complicated movements are combined in order to regulate one end of the spring. There are problems such as an increase in cost. And this literature (1) and / or literature (2) is the structure controlled via the handle operation of a reclining mechanism, and / or a wire (it is necessary to control via operation of other incidental facilities) ), There are problems in that it is troublesome, there are restrictions on the combination and / or configuration with other incidental equipment, and the structure is complicated and the assembly is difficult.

  The invention of claim 1 is configured such that one end of the spring is engaged with one hook piece of the movable seat back frame, and the other end is engaged with the other hook piece movably provided on the shaft of the seat back frame. The one and / or the other hook piece is movable in a direction in which one end and the other end of the spring face each other when the seat back frame (seat back) is tilted backward (retracted, that is, flat), and the seat back frame ( When the seat back is tilted forward (advanced, ie, folded), the spring is controlled so that one end and the other end of the spring are opposed to each other. Or, a movement and the like, or a gentle and reliable folding and / or movement of the seat back is intended. Accordingly, it is intended to eliminate various impacts or to eliminate the above-described adverse effects based on the impacts. Further, the invention of claim 1 adopts the above-described configuration, thereby relaxing the restriction on the spring and avoiding the fatigue of the spring, or facilitating and speeding up the assembly of the apparatus mainly composed of the spring. In addition to this, it is intended to facilitate and speed up the processing of the spring. Further, it is intended to avoid the spring turbulence and to ensure the reliable movement of the seat back and the smooth movement as described above.

  The first aspect of the present invention includes a lock mechanism that controls locking and unlocking of the reclining mechanism, and a spring having one end fixed to the seat back frame and the other end fixed to the casing of the reclining, and the spring is connected to the one end and / or When the seat back is tilted backward, the movement of the other end is restricted, and when the seat back is moved in the opposite direction to tension one end and / or the other end, the spring is tensioned, and the seat back is tilted forward The seat reclining device is characterized in that one end and / or the other end of the spring moves in an opposing direction to relax, and the spring is relaxed.

  The invention of claim 2 is intended to achieve the object of claim 1 and to secure a standard seating position of the seat back frame that is optimal for achieving this object.

  According to a second aspect of the present invention, the boundary between the backward and forward movements according to the first aspect is approximately 100 degrees to approximately 120 degrees of the seat back, and the seat back frame is an angle of a standard seating position. The seat reclining device.

  The invention of claim 3 is intended to achieve the object of claim 1 and to achieve the optimum regulation and / or function of the spring to achieve this object.

  According to a third aspect of the present invention, when the one end and / or the other end of the spring is moved in an opposite direction to be tensioned, the spring is tensioned, and when the seat back is moved forward, one end of the spring is And / or a configuration in which the other end is moved in an opposite direction to relax the other end, the one end of the spring is fixed to one hook piece protruding from the seat back frame, and the other end of the spring is fixed to the casing of the lock mechanism. It has a link loosely fitted to the pin of the seat back frame having an external tooth portion that engages with the other hook piece provided on the transmission medium having a tooth portion pivotally supported on the transmission medium and meshes with the tooth portion of the transmission medium. A seat reclining device characterized by the above.

  The invention of claim 4 is intended to achieve the object of claim 3 and to provide a curved surface portion of the link which is optimal for achieving this object and avoiding a collision.

  According to a fourth aspect of the present invention, there is provided a seat reclining device in which the link according to the third aspect forms a curved surface portion at a part thereof in order to avoid collision with the spring.

  The invention of claim 5 is intended to achieve the object of claim 1 and to provide ancillary conditions for a spring that is optimal to achieve this object.

According to a fifth aspect of the present invention, when one end and / or the other end of the spring is moved in an opposite direction to be tensioned, the spring is tensioned, and when the seat back is moved forward, one end of the spring is And / or a seat reclining device characterized in that the configuration of moving in the opposite direction to relax the other end can be changed under the following conditions:
The condition is constituted by one or a plurality of combination mechanisms described below.
(1) Link length and / or pin position (2) Link hole length and / or angle (3) Pitch, size, shape and / or diameter of transmission medium / link outer teeth (4) ) Distance between transmission medium axis and link axis (5) Locking position and / or distance of one end and / or other end of spring

  The invention of claim 6 is intended to achieve the object of claim 1 and to achieve the optimum regulation and / or function of the spring to achieve this object.

  A sixth aspect of the present invention provides the first end of the spring according to the first aspect of the present invention, when one end and / or the other end of the spring is moved in an opposite direction to be tensioned, the spring is tensioned, and the seat back is tilted forward. And / or a configuration in which the other end is moved in an opposite direction to relax the other end, the one end of the spring is fixed to one hook piece protruding from the seat back frame, and the other end of the spring is fixed to the casing of the lock mechanism. A seat reclining having a link that is locked to a transmission medium provided with a locking portion provided on the seat and that is loosely fitted to a pin of the seat back frame provided with a locking portion that is locked to the locking portion. Device.

  The invention of claim 7 is intended to achieve the object of claim 6 and to achieve the optimum regulation and / or function of the spring to achieve this object.

  According to a seventh aspect of the present invention, there is provided a seat reclining device in which the locking portion according to the sixth aspect is constituted by a link mechanism having a pin.

  The invention of claim 8 is intended to achieve the object of claim 6 and to provide ancillary conditions for a spring that is optimal to achieve this object.

According to an eighth aspect of the present invention, when one end and / or the other end of the spring is moved in an opposite direction to be tensioned, the spring is tensioned, and when the seat back is moved forward, one end of the spring is And / or a configuration that moves in the opposite direction to relax the other end ”is a configuration that can be changed under the following conditions:
The condition is constituted by one or a plurality of combination mechanisms described below.
(1) Link length and / or pin position (2) Link hole length and / or angle (3) Transmission medium / link locking part size and shape and / or slot length (4) Link length and / or angle of link mechanism (5) Locking position and / or distance of one end and / or other end of spring

  The invention of claim 9 is intended to achieve the object of claim 1 or claim 6 and to provide an optimum body structure for achieving the object and to protect the body structure.

  Claim 9 is described in claim 1 or claim 6, "when one end and / or the other end of the spring is moved in the opposite direction to be tensioned, the spring is tensioned, and when the seat back is tilted forward, The seat reclining device is characterized in that a configuration in which one end and / or the other end of the spring is moved in an opposing direction to relax is surrounded by a casing.

  The invention of claim 10 achieves the object of claim 1 or claim 6 and provides an optimum structure of the seat back frame, the link and / or the axis of the pin for achieving the object. This is intended.

  A seat reclining device according to claim 10, wherein an axis of the seat back frame, the link and / or the pin according to claim 1 is on an angle of a standard seating position of the seat. It is.

  The invention of claim 11 achieves the object of claim 3 and makes an optimum adjustment of the seat back frame load to achieve this object. Is intended.

  An eleventh aspect of the present invention is a seat reclining device in which a conformity mark is provided between the transmission medium according to the third aspect and an external tooth portion of the link.

  The invention of claim 12 achieves the object of claim 3, and adjusts the load of the seat back frame optimally to achieve this object, performs this adjustment with one touch, and makes this adjustment delicately. Intended to do.

  A twelfth aspect of the present invention provides the link according to the third aspect, in which a link base end portion having an external tooth portion and / or a connecting piece for adjustment, and a link main body support portion and / or a connection overlapping the link base end portion. The seat reclining device is characterized in that an adjusting stopper and / or a spring are provided to connect the connecting pieces, and the interval formed between the connecting pieces is adjustable.

  The invention of claim 1 has a lock mechanism that controls locking and unlocking of the reclining mechanism, and a spring that has one end fixed to the seat back frame and the other end fixed to the casing of the reclining, and the spring is connected to one end and / or When the seat back is moved backward, the movement of the other end of the spring is restrained by moving at one end and / or the other end, and the spring is tensioned. When the seat back is moved forward, one end of the spring is controlled. And / or a seat reclining device that moves in the opposite direction to relax the other end and relaxes the spring.

  Accordingly, the first aspect of the present invention is configured such that one end of the spring is engaged with one hook piece of the movable seat back frame and the other end is engaged with the other hook piece movably provided on the shaft of the seat back frame. And / or the other hook piece is movable in a direction in which one end and the other end of the spring face each other when the seat back is tilted backward, and one end and the other end of the spring face each other when the seat back is tilted forward. Therefore, the seat back can be quickly and reliably raised and / or moved, or the seat back can be folded and / or moved slowly and reliably. As a result, various kinds of impacts can be eliminated, or the above-described adverse effects can be solved based on the impacts. Further, according to the first aspect, by adopting the above-described configuration, it is possible to relax the restriction on the spring and to avoid the fatigue of the spring, or to facilitate and speed up the assembly of the apparatus mainly composed of the spring. In addition to this, there is a feature that the processing of the spring can be facilitated and speeded up. Furthermore, there is an advantage that a reliable movement of the seat back and a smooth movement as described above can be ensured by avoiding the spring sway (unstable tension and / or relaxation).

  The invention according to claim 2 is characterized in that the boundary between the backward movement and the forward movement according to claim 1 is from about 100 degrees to about 120 degrees of the seat back, and the seat back frame is an angle of the standard seating position. The seat reclining device.

  Therefore, the second aspect has the characteristics that the object of the first aspect can be achieved, and the standard seating position of the seat back frame that is optimal for achieving the object can be secured.

  According to a third aspect of the present invention, when one end and / or the other end of the spring is moved in an opposite direction to be tensioned, the spring is tensioned, and when the seat back is moved forward, one end of the spring and / or Or, the other end of the spring moves in the opposite direction to secure the other end of the spring is fixed to one hook piece protruding from the seat back frame, and the other end of the spring is a tooth that is pivotally supported by the casing of the lock mechanism. A seat reclining device having a link loosely fitted to a pin of a seat back frame having an external tooth portion which is engaged with the other hook piece provided on the transmission medium having a portion and meshes with a tooth portion of the transmission medium It is.

  Accordingly, the third aspect has the characteristics that the object of the first aspect can be achieved, and that the most suitable spring regulation and / or function can be achieved to achieve the object.

  According to a fourth aspect of the present invention, there is provided a seat reclining device in which the link according to the third aspect forms a curved surface portion in part in order to avoid collision with a spring.

  Accordingly, claim 4 has the characteristics that the object of claim 3 can be achieved, and the curved surface portion of the link which is optimal for achieving this object and avoiding the collision can be provided.

According to a fifth aspect of the present invention, when one end and / or the other end of the spring is moved in an opposite direction to be tensioned, the spring is tensioned, and when the seat back is moved forward, one end of the spring and / or Or, the configuration that moves in the opposite direction to relax the other end ”is a seat reclining device that can be changed under the following conditions:
The condition is constituted by one or a plurality of combination mechanisms described below.
(1) Link length and / or pin position (2) Link hole length and / or angle (3) Pitch, size, shape and / or diameter of transmission medium / link outer teeth (4) ) Distance between transmission medium axis and link axis (5) Locking position and / or distance of one end and / or other end of spring

  Accordingly, the fifth aspect has the characteristics that the object of the first aspect can be achieved, and an auxiliary condition for the spring which is optimal for achieving the object can be provided.

  According to a sixth aspect of the present invention, when one end and / or the other end of the spring is moved in an opposite direction to be tensioned, the spring is tensioned, and when the seat back is moved forward, one end of the spring and / or The other end of the spring is fixed to one hook piece protruding from the seat back frame, and the other end of the spring is locked to the lock mechanism casing. A seat reclining device characterized by having a link that is engaged with a pin of a seat back frame that is engaged with a transmission medium provided with a portion and is engaged with the engagement portion.

  Accordingly, the sixth aspect has the characteristics that the object of the first aspect can be achieved and that the most suitable spring regulation and / or function can be achieved to achieve the object.

  A seventh aspect of the present invention is a seat reclining device characterized in that the locking portion according to the sixth aspect is configured by a link mechanism having a pin.

  Accordingly, the seventh aspect has the characteristics that the object of the sixth aspect can be achieved, and that the most suitable spring regulation and / or function can be achieved to achieve the object.

The invention according to claim 8 is the invention according to claim 6, wherein when one end and / or the other end of the spring is moved in an opposite direction to tension, the spring is tensioned, and when the seat back is tilted forward, Or, the configuration that moves in the opposite direction to relax the other end ”is a configuration that can be changed under the following conditions,
The condition is constituted by one or a plurality of combination mechanisms described below.
(1) Link length and / or pin position (2) Link hole length and / or angle (3) Transmission medium / link locking part size and shape and / or slot length (4) Link length and / or angle of link mechanism (5) Locking position and / or distance of one end and / or other end of spring

  Accordingly, the eighth aspect has the characteristics that the object of the sixth aspect can be achieved, and an auxiliary condition for the spring which is optimal for achieving the object can be provided.

  According to a ninth aspect of the present invention, the spring according to the first or sixth aspect, wherein the spring is moved when it is moved in an opposite direction to tension one end and / or the other end of the spring, the spring is tensioned, and the seat back is moved forward. The seat reclining device is characterized in that the casing is surrounded by a configuration in which one end and / or the other end is moved in an opposite direction to relax.

  Accordingly, claim 9 has features such that the object of claim 1 or claim 6 can be achieved, and the optimum body structure can be achieved to protect the object structure. .

  The invention of claim 10 is a seat reclining device characterized in that the axis of the seat back frame, link and / or pin according to claim 1 or 6 is on an angle of a standard seating position of the seat. is there.

  Therefore, claim 10 can achieve the object of claim 1 or claim 6 and can provide an optimum seat back frame, link and / or pin shaft structure for achieving the object. It has the characteristics.

  The invention of claim 11 is a seat reclining device characterized in that a conformity mark is provided between the transmission medium of claim 3 and the external tooth portion of the link.

  Therefore, claim 11 can achieve the object of claim 3, can adjust the load of the seat back frame optimal to achieve this object, can be easily made visually when performing this adjustment, etc. There are features.

  According to a twelfth aspect of the present invention, the link according to the third aspect includes a link base end portion having an external tooth portion and / or a connecting piece for adjustment, a link main body support portion superimposed on the link base end portion, and / or The seat reclining device includes a connecting piece, and is provided with an adjusting stopper and / or a spring for connecting the connecting pieces so that an interval formed between the connecting pieces can be adjusted.

  Therefore, claim 12 can achieve the object of claim 3, can optimally adjust the seat back frame load to achieve this object, can perform this adjustment with one touch, and can make this adjustment delicately. There is a feature that can be done.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  First, in each example such as first to fourth examples to be described later, in the figure, A is a vehicle seat, A1 is a seat cushion of seat A, and A2 is a seat back of seat A. B is a lock mechanism, and the lock mechanism B includes a lock / unlock mechanism for raising and folding the seat A provided on the seat back frame A3. The lock mechanism B is provided with a return means such as a spring (not shown) that controls the return of the operation handle C.

  Next, FIGS. 2-1 to 2-4-2 are schematic views showing a first embodiment of the present invention, and FIG. 2-1 shows a seat back frame, a link mechanism and / or a spring. FIG. 2-2 is a schematic side view showing the angle of the standard seating position. FIG. 2-2 is a schematic side view showing the rearward tilt state of FIG. 2-1, and FIG. It is a schematic diagram. FIG. 2-4-1 to FIG. 2-4-3 show the relationship between the pin and the link shown in FIG. 2-1, and the second to fourth described later, starting with the first embodiment. FIG. 2-4-1 is an enlarged cross-sectional view of a main part in which a cylindrical cushion material is surrounded by a deep drawing pin, and FIG. 2-4-2 is a deep drawing. Fig. 2-4-3 is an enlarged cross-sectional view of the main part of the pin fitted with a hooked cylindrical cushion material. It is an expanded section.

  A preferred configuration shown in FIGS. 2-1 to 2-3 in the first embodiment will be described. Reference numeral 1 denotes a reclining (apparatus) casing. The casing 1 is fitted and secured to the casing body 100. And this casing main body 100 is means, such as assembling | attaching integrally through impacts, such as a vibration, vibration, etc., as shown in FIGS. And is secured to the main body B1 of the locking mechanism B. In this casing 1, a transmission medium having a support piece 101 cut out and protruding from the casing main body 100 through press molding and a tooth portion 30 pivotally supported on the shaft 2 provided on the support piece 101 on the lower surface. 3, a spring 4 in which the other end 41 is locked to the other hook piece 31 provided in the transmission medium 3, and one hook piece provided in the seat back frame A 3 in which one end 40 of the spring 4 is locked 5, a link 7 having an external tooth portion 70 screwed into the tooth portion 30 of the transmission medium 3 at one end 7 a, and a pin 8 into which a long hole 71 provided in the other end 7 b of the link 7 is loosely fitted. I have. The pin 8 is provided at a predetermined position of the seat back frame A3. In the figure, reference numeral 10 denotes a stopper. In this example, as shown in FIGS. 3A and 3B, the transmission medium 3 has the other hook piece 31 on the left side as viewed in the drawing and the tooth portion 30 positioned on the right side as viewed in the drawing. The external tooth portion 70 of the link 7 is positioned on the tooth portion 30 located on the right side, and the link 7 is installed and reliably moved using a slight gap between the main body B1 and the spring 4. It is set as the structure which aims at. It is also possible to adjust the load by providing a plurality of pins 8. The engagement relationship between the pin 8 and the long hole 71 is effective in preventing the backlash of the link 7, the transmission medium 3 and the external tooth portion 70 of the link 7, or the spring 4 and / or the generation of backlash. Further, the difference in the rotation radius between the seat back frame A3 and the link 7 is absorbed. Further, FIG. 2-4-1 shows a configuration in which a cylindrical cushioning material 80 is surrounded by a deep drawing pin 8 that is beneficial in terms of molding or cost, and the occurrence of rattling and / or rattling noise is avoided. And / or avoiding wear of the long holes 71 and improving aesthetics. FIG. 2-4-2 is an example in which a cushion member 80 having a flanged cylindrical shape 81 is fitted to the deep drawing pin 8, and is similar to the above-described example. Further, FIG. 2-4-3 is an example in which a cylindrical cushion material 80 provided with a hook piece 82 is fitted into a pin 8 provided with an opening 8a with an inner collar, and is similar to the above example. The pin 8 may be a simple example in which the cushion material 80 is not provided.

  In the above configuration, the rearward tilt and / or forward tilt will be described. When the seat A in FIG. 2-1 is in the standard seating position, the pin 8, the shaft 2 of the seat back frame A3, and / or the shaft 72 of the link 7 are used. The shape projecting from the main body B1 is on a virtual inclination line D of about 100 degrees to about 120 degrees with respect to the horizontal plane of the sheet A. From this state, the lock mechanism B is released, and the seatback frame A3 tilts backward with the shaft 2 as a fulcrum in the direction of the arrow “I” due to external factors such as weight, so that one hook piece 5 is rotated clockwise ( Move to (shown). By this movement, one end 40 of the spring 4 is tensioned (compressed). At the same time, the link 7 is moved clockwise, and the external tooth portion 70 provided on the link 7 is also moved clockwise. By the movement of the external tooth portion 70 in the clockwise direction, the transmission medium 3 meshing with the external tooth portion 70 is moved in the counterclockwise direction (illustrated). With the rotation of the transmission medium 3 in the counterclockwise direction, the other hook piece 31 moves in the counterclockwise direction. The other end 41 of the spring 4 is tensioned by this movement (movement in the opposite direction of tension). That is, the movement of the one hook piece 5 and the other hook piece 31 in the facing direction causes the spring 4 to move in the facing direction in which it is tensed, and the tension is achieved in a short time. A state (full flat state) in which the tightening is achieved and the seat back A2 is finally tilted backward is shown in FIG. Then, the lock mechanism B is released, and the seat back frame A3 returns with the shaft 2 as a fulcrum in the direction of the arrow “B”, so that one hook piece 5 moves counterclockwise. With this movement, one end 40 of the spring 4 is relaxed (toward compression release). At the same time, the link 7 moves counterclockwise, and the external tooth portion 70 provided on the link 7 similarly moves counterclockwise. When the external tooth portion 70 is movable in the counterclockwise direction, the transmission medium 3 meshing with the external tooth portion 70 is moved in the clockwise direction. With the clockwise rotation of the transmission medium 3, the other hook piece 31 moves in the clockwise direction. The other end 41 of the spring 4 is relaxed by this movement (moving in the opposite direction of relaxation). That is, the movement of the one hook piece 5 and the other hook piece 31 in the opposing direction causes the spring 4 to move in the opposing direction to be relaxed. FIG. 2-1 shows a state where the seat back A2 can be returned and the seat back A2 returns to the standard seating position. Thereafter, when the return force is used with the lock mechanism B still released, the seat back frame A3 tilts forward with the shaft 2 as a fulcrum in the direction of the arrow “c”, and one hook piece 5 is counterclockwise. And the tightening force of the spring 4 does not act. By this movement, the one end 40 of the spring 4 moves by inertia. At the same time, the link 7 moves counterclockwise with inertia, and the external tooth portion 70 provided on the link 7 also moves counterclockwise with inertia. The transmission medium 3 that meshes with the external tooth portion 70 moves slowly in the clockwise direction by the movement of the external tooth portion 70 due to the counterclockwise inertia. With the gentle rotation of the transmission medium 3 in the clockwise direction, the other hook piece 31 moves by inertia in the clockwise direction. This movement causes the other end 41 of the spring 4 to move by inertia, and the tightening force of the spring 4 does not act. That is, the spring 4 is relaxed by a gentle reaction force in the opposite direction through the movement of the one hook piece 5 and the other hook piece 31 due to inertia in the opposite direction, but the shock is given to the person. There is no reaction force. Therefore, the seat back A2 can be gently and reliably folded and / or erected. As a result, various kinds of impacts can be eliminated, or the above-described adverse effects can be solved based on the impacts. This return can be achieved and the seat back A2 is tilted forward as shown in FIG.

  FIG. 3A is a cross-sectional view of a part of the main part in XX shown in FIG. 2A, and a preferred example of a structure in which the casing body 100 is integrally assembled to the main body B1 by welding. Show. 3-2 to FIG. 3-4-2 show the main parts of a structure that is similarly crushed by caulking or a tool, and assembled integrally through an impact such as vibration. 3-2 is a cross-sectional view in which the protrusion is crushed by caulking, FIG. 3-3 is a cross-sectional view in which the deep drawing is crushed by means of rolling caulking, etc., and FIGS. 3-4-1 and 3-4-2 are protrusions Sectional views in which the cylindrical portion is crushed with a tool are respectively shown. Any of them is an example and is not limited, and a one-touch fixing method with a tool and / or a mounting method with a robot are desirable. Of course, it is possible by hand (other configurations are the same).

  Next, FIGS. 4-1 to 4-3 are preferable examples of the spring 4. By giving the spring 4 rigidity or reducing the contact area, friction is reduced and smooth movement is guaranteed. It is intended to do. In the figure, reference numeral 42 denotes a longitudinal ridge, and 43 denotes the same ridge. With the special cross-sectional shape of the spring 4, adjustment of an increase in friction, etc., and reduction of frictional resistance, contact wear, etc. when superimposed are achieved. Moreover, the normal belt-like spring 4 shown in each other figure is also employable.

  FIG. 5 shows another configuration of the configuration shown in the first embodiment. In this example, a conformity mark 12 is engraved at the joint between the transmission medium 3 and the link 7, and the conformity mark 12 is appropriately set. By combining them, for example, it is a configuration that facilitates load adjustment or assembly, simplifies use, etc., and is adopted as necessary.

  Further, FIG. 6 shows still another configuration of the configuration shown in the first embodiment, and this example is a configuration in which a plurality of pins 8 are provided in the link 7. By using this relationship and adjusting the movable distance of the link 7, for example, it is a configuration for achieving load adjustment or agile movement, etc., and is adopted as necessary.

  FIGS. 7-1 to 7-4 show other examples in which the casing 1 is detachably provided on the plurality of locking bands B2 provided on the main body B1 of the lock mechanism B. It is intended to be attached to the lock mechanism B or to expand the range of selection. 7A and 7B, the seat reclining device of the present invention is assembled to the plurality of locking bands B2 provided on the main body B1 of the locking mechanism B via the plurality of locking insertion pieces 102 provided on the casing main body 100. FIG. 7-2 shows a disassembled state before assembling the seat reclining device of the present invention provided in the main body B1 of the lock mechanism B. FIG. FIG. 7-3 is an enlarged cross-sectional view showing a state in which the three locking insertion pieces 102 are press-fitted into at least three (the same applies to other examples) locking band portions B2, and is one-touch. An example of a configuration enabling operation and / or robot operation is shown. FIG. 7-4 is a cross-sectional view showing an example of the support piece 101, which is an example of a preferable configuration of press molding, and an example of a configuration that can be assembled by one-touch operation and / or robot operation. It was. Of course, the attachment of the casing body 100 to the body B1 of the lock mechanism B is an example and is not limited.

  FIGS. 8-1 to 8-3 are schematic side views of the main part showing a preferred example of adjusting the load by utilizing the length of the link shown in the second embodiment of the present invention. Since the general configuration is the same as that of the first embodiment, only the difference will be described. This example is an example in which this load adjustment can be finely adjusted, that is, the link 7 includes a link proximal end portion 7c having an external tooth portion 70 and / or a bent connecting piece 74 for adjustment, and a link proximal end. The link body support portion 7d that is superimposed on the portion 7c via the shaft 72 and / or the member 7e such as a collar and a sleeve and / or the connection piece 75 bent from the link body support portion 7d and the connection pieces 74, 75 It comprises a stopper 76 and / or a spring 77 provided with a screw in a part provided with an adjusting screw portion to be connected, and an interval H formed between the connecting pieces 74 and 75 can be adjusted. This interval H can be narrowed, and the tension and / or relaxation of the spring 4 is achieved by adjusting the screwing between the external tooth portion 70 of the link 7 and the tooth portion 30 of the transmission medium 3. There are features such that the load adjustment of the seat back frame A3 can be achieved through the tension and / or relaxation of the spring 4, the adjustment can be performed with one touch, and the adjustment can be performed delicately. And even if it is the seat back A2 and / or headrest of the same shape and weight, it is possible to finely adjust the variation in friction during reclining, and it is possible to finely adjust the seat back A2 and / or headrest of other shapes and weights. It can be adjusted and is extremely useful, and can be useful because it can be adjusted in multiple stages (fine), and it can contribute to reducing the number of parts, facilitating assembly, and reducing costs. As described above, since the stopper 76 includes a screw in part, the interval H can be narrowed and finely adjusted within the range of the length of the screw. Since the stopper 76 employs a screw fitting method, fine adjustment is possible by screwing the stopper 76 into the screw 76, and the spring 77 can be omitted. As described above, the link base end portion 7c and / or the link main body support portion 7d are provided so as to overlap with each other through a member 7e such as a collar and a sleeve, etc. Avoid rattling noise and wear, and make precise assembly. 8B is an enlarged cross-sectional view taken along the line YY of the main part shown in FIG.

  FIG. 9A is a schematic side view of a main part in which the seat explaining the relationship between the seat back frame and the link mechanism and / or the spring according to the third embodiment of the present invention is an angle of the standard seating position. Since the basic configuration is the same as that of the first embodiment, only the difference will be described. In this example, the above-described transmission medium 3 is provided with a locking portion 32 having a forked protrusion-like concave portion 32a (convex portion), and a link 7 (as shown in FIG. It is desirable to make the movable stroke closer and to increase the movable stroke (which may be the same in other examples), and a locking portion 73 provided with a convex portion 73a (concave portion) with a projection 73a-1 is provided. ing. When the link 7 is moved in the same manner as in the above-described example, the locking portion 32 and the locking portion 73 are connected so that tension and / or relaxation of the spring 4 is achieved. According to one embodiment.

  FIG. 9-2 is a modified example of FIG. 9A. The locking portion 32 provided with the concave portion 32a (protrusion portion) having a bifurcated protrusion is replaced with a convex portion 32a- with a protrusion 32a-1 having a single shape. In this example, the locking part 32 having 2 (convex part) is provided, and the link 7 is provided with a locking part 73 having a convex part 73a (concave part) correspondingly. Others are the same as the above example.

  FIG. 9-3 is a schematic side view of the main part in which the seat explaining the relationship between the seat back frame and the link mechanism and / or the spring according to the fourth embodiment of the present invention is the angle of the standard seating position. Since the basic configuration is the same as that of the first embodiment, only the difference will be described. In this example, the above-described transmission medium 3 is provided with a locking portion 32 having a long hole 32b, and a corresponding locking portion 73 having a long hole 73b is provided in the link 7. . And in this example, it is the structure which ensures the connection relation of the long hole 32b and the long hole 73b with the connection pin 11. FIG. Therefore, when the link 7 is movable in the same manner as in the above-described example via this connection relationship, the spring 4 is tensioned and / or relaxed by connecting the locking portion 32 and the locking portion 73, and the operation thereof The functions are the same as those in the first embodiment.

  10-1 and 10-2 show tension and / or relaxation of the spring 4, in other words, load adjustment of the seat back A2.

  For example, FIG. 10A is constituted by one of the following conditions or a plurality of combination mechanisms in the first and fourth embodiments.

(1) The length of the link 7 and / or the position of the pin 8 (2) The length and / or angle of the long hole 71 of the link 7 (3) The pitch, size, and size of the external teeth 70 of the transmission medium 3 and link 7 Shape and / or diameter (4) Distance between the axis of the shaft 2 of the transmission medium 3 and the axis of the shaft 72 of the link 7 (5) Locking position and / or distance of the one end 40 and / or the other end 41 of the spring 4 Further, FIG. 10-2 is constituted by one of the following conditions or a plurality of combination mechanisms in the second and third embodiments.

(1) The length of the link 7 and / or the position of the pin 8 (2) The length and / or the angle of the long hole 71 of the link 7 (3) The size of the engaging portions 32 and 73 of the transmission medium 3 and the link 7 Shape and / or length of long holes 32b and 73b (4) Link length and / or angle of link mechanism (5) Locking position and / or distance of one end 40 and / or other end 41 of spring 4

FIG. 1 is a schematic view of a scale in which the present invention is applied to a seat reclining device. FIG. 2-1 is a schematic view showing the first embodiment of the present invention, and is a schematic side view in which the seat explaining the relationship between the seat back frame and the link mechanism and / or the spring is the angle of the standard seating position. Figure FIG. 2-2 is a schematic side view of FIG. 2-3 is a schematic side view of the forward tilt state of FIG. FIG. 2-4-1 shows the relationship between the pin and the link shown in FIG. 2-1, which is preferably adopted in each embodiment such as the first to the second embodiments, the fourth embodiment, and the like. This is an example of an enlarged cross-sectional view of the main part surrounding a deep-drawn pin with a cylindrical cushioning material FIG. 2-4-2 shows the relationship between the pin and the link shown in FIG. 2-1, which is preferably adopted in each of the embodiments such as the first to the second embodiments. This is an example of an enlarged cross-sectional view of the main part of a deep drawing pin fitted with a flanged cylindrical cushion material FIG. 2-4-3 shows the relationship between the pin and the link shown in FIG. 2-1, which is preferably adopted in each embodiment such as the first to the second embodiments, the fourth embodiment, and the like. An enlarged cross-sectional view of the main part, which is an example and a cylindrical cushion material provided with a hook piece is inserted into a pin provided with an opening with an inner collar FIG. 3A is a cross-sectional view of a part of the main part in XX shown in FIG. 2A, and shows an overall preferable example of a configuration in which the casing main body is integrally assembled to the main body by welding. Schematic cross-sectional view of FIG. 3-2 shows a preferable example of a structure in which the casing body is integrally assembled to the main body by welding, and is a cross-sectional view in which the protrusion is crushed by caulking FIG. 3-3 shows a preferred example of a structure in which the casing main body is integrally assembled to the main body by welding, and is a cross-sectional view in which the deep drawing is crushed by means such as rolling caulking FIG. 3-4-1 shows a preferred example of a structure in which the casing body is integrally assembled to the main body by welding, and is a cross-sectional view before the protruding cylindrical portion is crushed with a tool Sectional view in which the protruding cylinder shown in Fig. 3-4-2 is crushed with a tool FIG. 4-1 is a schematic diagram assuming a fitting state showing a preferable example of a spring. 4-2 is an enlarged cross-sectional view of the main part of FIG. Fig. 4-3 is a schematic view of Fig. 4-1. FIG. 5 is a schematic diagram of a main part illustrating another configuration of the first embodiment and illustrating a configuration example in which a conformity mark is engraved at the joint between the transmission medium and the link. FIG. 6 shows still another configuration of the first embodiment, which is a configuration in which a plurality of pins are provided in the link, and a schematic diagram of a main part for explaining a configuration example using the relationship with the long hole provided in the link. Figure FIG. 7A shows another example in which a casing is detachably provided on a plurality of locking bands provided on the main body of the lock mechanism, and a plurality of locking bands provided on the casing body are provided on the plurality of locking bands. The cross-sectional schematic diagram of the whole which showed the state which assembled | attached the seat reclining apparatus of this invention through the latching insertion piece of this FIG. 7-2 is an overall cross-sectional schematic view showing an exploded state before assembling the seat reclining device of the present invention provided on the main body of the lock mechanism. FIG. 7-3 is an enlarged cross-sectional view showing a state in which three locking insertion pieces are press-fitted into at least three locking bands. FIG. 7-4 is a sectional view showing an example of the support piece. FIG. 8-1 is a schematic side view of the main part showing a preferred example of adjusting the load by utilizing the length of the link according to the second embodiment of the present invention. FIG. 8-2 is an enlarged cross-sectional view taken along YY of the main part shown in FIG. 8-3 is a schematic cross-sectional view of the entire assembly of the second embodiment shown in FIG. FIG. 9A is a schematic side view of a main part in which the seat explaining the relationship between the seat back frame and the link mechanism and / or the spring according to the third embodiment of the present invention is an angle of the standard seating position. Side surface schematic diagram of the main part showing the modified example of FIG. FIG. 9-3 is a schematic side view of a main part in which the seat explaining the relationship between the seat back frame and the link mechanism and / or the spring according to the fourth embodiment of the present invention is the angle of the standard seating position. FIG. 10-1 is a diagram for explaining the seat back load adjustment. Fig.10-2 is a chart explaining the seatback load adjustment FIG. 11 shows the combination patterns of the above-described embodiments, and the first to tenth plans can be considered.

Explanation of symbols

A Seat A1 Seat cushion A2 Seat back A3 Seat back frame B Lock mechanism B1 Main body B2 Locking band C Operation handle D Virtual inclined line 1 Casing 100 Casing main body 101 Supporting piece 102 Locking insertion piece 2 Shaft 3 Transmission medium 30 Tooth 31 Other hook piece 32 Locking part 32a Recessed part 32a-1 Protrusion 32a-2 Convex part 32b Long hole 4 Spring 40 One end 41 Other end 42 Convex strip 43 Concave strip 5 One hook piece 7 Link 7a One end 7b Other end 7c Link base end portion 7d Link body support portion 7e Member such as collar, sleeve 70 External tooth portion 71 Long hole 72 Shaft 73 Locking portion 73a Convex part 73a-1 Protrusion 73b Long hole 74 Connection piece 75 Connection piece 76 Stopper 77 Spring 8 pin 8a Opening with inner flange 80 Cushioning material 81 Cylindrical shape with flange Shape 82 Hook 10 Stopper 11 Connecting pin 12 Conformity mark H Interval

Claims (12)

  There is a lock mechanism that controls locking and unlocking of the reclining mechanism, and a spring that has one end secured to the seat back frame and the other end secured to the reclining casing, and this spring is moved by the movement of the one end and / or the other end. When the seat back is tilted backward, it moves in an opposite direction to tension one end and / or the other end of the spring, tensions the spring, and when the seat back tilts forward, A seat reclining device that moves in the opposite direction to relax the other end and relaxes the spring.   The seat reclining device according to claim 1, wherein a boundary between the backward and forward movements is approximately 100 degrees to approximately 120 degrees of the seat back, and the seat back frame is an angle of a standard seating position.   The one end and / or the other end of the spring according to claim 1, wherein the spring is moved in an opposite direction to tension one end and / or the other end, the spring is tensioned, and the seat back is moved forward. In this configuration, one end of the spring is fixed to one hook piece projecting from the seat back frame, and the other end of the spring is supported by the casing of the lock mechanism. A seat having a link loosely fitted to a pin of the seat back frame having an external tooth portion which is engaged with the other hook piece provided on the transmission medium having a portion and meshes with a tooth portion of the transmission medium. Reclining device.   The link according to claim 3, wherein a curved portion is formed in a part of the link in order to avoid a collision with the spring. The one end and / or the other end of the spring according to claim 1, wherein the spring is moved in an opposing direction to tension one end and / or the other end, the spring is tensioned, and the seat back is tilted forward. The seat reclining device is characterized in that the configuration of `` moving in the opposite direction to relax '' can be changed under the following conditions,
The condition is constituted by one or a plurality of combination mechanisms described below.
(1) Link length and / or pin position (2) Link hole length and / or angle (3) Pitch, size, shape and / or diameter of transmission medium / link outer teeth (4) ) Distance between transmission medium axis and link axis (5) Locking position and / or distance of one end and / or other end of spring   The one end and / or the other end of the spring according to claim 1, wherein the spring is moved in an opposite direction to tension one end and / or the other end, the spring is tensioned, and the seat back is moved forward. In this configuration, one end of the spring is fixed to one hook piece protruding from the seat back frame, and the other end of the spring is fixed to the casing of the lock mechanism. A seat reclining device having a link that is engaged with a pin of the seat back frame provided with an engaging portion that engages with the engaging medium and that is engaged with the engaging medium.   The seat reclining device, wherein the locking portion according to claim 6 is configured by a link mechanism including a pin. 7. “When one end and / or the other end of the spring is moved in an opposing direction to tension one end and / or the other end, the spring is tensioned, and when the seat back is tilted forward, one end and / or the other end of the spring” `` Move in the opposite direction to relax '' is a configuration that can be changed under the following conditions,
The condition is constituted by one or a plurality of combination mechanisms described below.
(1) Link length and / or pin position (2) Link hole length and / or angle (3) Size / shape and / or slot length of the locking part of the transmission medium / link (4) Link length and / or angle of link mechanism (5) Locking position and / or distance of one end and / or other end of spring   The movement of the spring in one direction and / or the other end in an opposing direction, tensioning the spring, and when the seat back is tilted forward, A seat reclining device characterized in that a structure that moves in an opposite direction to relax the other end is surrounded by a casing.   The seat reclining device according to claim 1, wherein an axis of the seat back frame, the link and / or the pin is on an angle of a standard seating position of the seat.   A seat reclining device, wherein a conformity mark is provided between the transmission medium according to claim 3 and an external tooth portion of the link.   The link according to claim 3 includes a link base end portion having an external tooth portion and / or a connecting piece for adjustment, and a link main body support portion and / or a connecting piece superimposed on the link base end portion. The seat reclining device is characterized in that an adjustment stopper and / or a spring for connecting the connecting pieces is provided, and an interval formed between the connecting pieces is adjustable.

Images