JP4895601B2 - Active headrest - Google Patents

Description

  The present invention relates to a seat reclining device provided with a fitting structure between a vehicle lock mechanism and a casing and a load adjustment structure for the seat back.

  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 by a handle. By operating the lock and unlock, the leaf spring is tensioned and relaxed (tension release). In this configuration, folding of the reclining seat (which is a seat cushion and / or a seat back frame) depends exclusively on the repulsive force of the leaf spring. Therefore, the impact at the time of folding often causes unexpected troubles. One example will be described. [1] is a human problem due to impact. For example, the weak members such as infants, elderly people, sick people, etc. are injured, feared, or the hard members provided on the seat damage the weak people, and damage easily damaged items such as glasses, It has been pointed out that it may be destroyed in some cases. [2] is a problem in achieving various types and forms of vehicles and / or seats. That is, when it is desired to fold and / or stand up quickly (standing at an appropriate inclination angle “standard seating position angle”), the seat can be folded and / or raised quickly and with speed changes. In addition, it is mentioned that it is not always possible to properly 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, there is a “sheet reclining device” disclosed in Japanese Patent Application Laid-Open No. 2002-101997. The present invention is provided with an upper arm, a lower arm and / or a hook lever rotatably supported on a shaft of a seat back frame, and supports one end of a spiral spring provided on the shaft via the hook lever and / or a lower holder. Thus, when the seat back frame is in the forward-turned region, the engagement with the hook lever and / or the lower holder is avoided, the spiral spring is operated so that the acting force of the spiral spring is not transmitted to the lower arm, and the spring for returning the seat back is The structure is regulated by operating the lever, and has features such as avoiding a sudden return of the seat back frame, or providing a small and inexpensive seat reclining device. As another example, there is a “sheet reclining device with a table mechanism” disclosed in Japanese Patent Laid-Open No. 2001-120381 in Document (2). In this invention, a lock pawl that engages and disengages with a ratchet tooth portion of a ratchet wheel fixed to a center shaft of a base bracket is pivotally supported by an intermediate plate, and a center shaft having a long hole in which a lock pawl pin can be freely fitted is rotatable. The cam plate is engaged with the cam plate. The cam plate is urged clockwise by a spring (spiral spring) mounted on the center shaft, and a wire provided on the cam plate is connected to a pulley, and the pulley is fixed to the frame of the arm plate. The arm plate is tilted forward through the rotation of this pulley, and unless the table lock is released, even if the reclining lock is inadvertently released, the seat back is in the hammered state. There is a feature that can provide a seat reclining device in a full flat form that does not give a shock to the sheet. 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 65297 “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 JP 2004-65297 A

  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 such that the repulsive force of the spring is regulated at one end, and this regulation is exerted on the entire spring. When the seat is folded using the tension and relaxation at one end of the spring and / or in the vicinity thereof. Shock absorption. Therefore, it is not necessarily sufficient to avoid shock absorption during folding of a seat mainly composed of a spring or various obstacles due to this shock.

  Moreover, although literature (1) and / or literature (2) employ | adopt the structure which controls the end of a spring, the structure which combined use of various components and complicated movement is employ | adopted. Therefore, there are problems such as a complicated structure and an increase in cost. Further, the document (1) and / or the document (2) are configured to be controlled through a handle operation of a reclining mechanism and / or a wire or the like, and controlled through an operation of other incidental equipment. Therefore, it is necessary to combine with other ancillary equipment, and there are problems such as being troublesome, constraining the configuration, complicating the structure, or causing difficulty in assembling.

According to the first aspect of the present invention, one end of the spring is locked to one hook piece of the movable seat back frame (seat back), and the other end is locked to the other hook piece movably provided on the seat back frame shaft. 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 is tilted backward (retracted, that is, flat). When the front is tilted (advanced, ie, folded), it is possible to quickly and surely stand up and / or move the seat back frame, or the seat back by restricting the spring so that one end and the other end of the spring are opposed to each other. It is intended to achieve gentle and reliable folding and / or movement. Further, it is intended to eliminate various impacts or to eliminate the above-described adverse effects based on these 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. It is intended to plan. Furthermore, it is intended to facilitate and speed up the assembly of the lock mechanism and the casing of the seat reclining mechanism. Further, the invention of claim 1 is intended to achieve the above-mentioned object, and to achieve the optimum regulation and / or function of the spring to achieve this object.

The first aspect of the present invention includes 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 casing of the reclining mechanism. When the seat back is tilted back and / or regulated by the movement of the other end, it moves in the opposite direction to tension one end and / or the other end of the spring, the spring is tensioned, and the seat back is tilted forward Sometimes, the seat reclining device configured to move in the opposite direction to relax one end and / or the other end of the spring and relax the spring ,
The lock mechanism and the casing are configured to be detachable using a fitting relationship between the receiving piece and the locking piece ,
Further, when the seat back is moved forward, the one end and / or the other end of the spring is tensioned, and when the seat back is moved forward, the one end and / or the other end of the spring is relaxed. a configuration to move, with the spring end of the sealed solid in one of hooks projecting from the seat back frame, and the teeth of the driven side which is pivotally supported on the casing of the locking mechanism and the other end of the spring A lock mechanism configured to engage with the other hook piece provided on the transmission medium, mesh with a driven tooth portion of the transmission medium, and loosely fit a link having an external tooth portion to a pin of the seat back frame And a casing reclining device.

The invention of claim 2 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 with a predetermined load in a direction in which one end and the other end of the spring face each other when the seat back frame is tilted backward, and when the seat back frame is tilted forward, By restricting the spring that moves in the direction where one end and the other end face each other, the seat back frame can be raised and / or moved quickly with a predetermined load, or the seat back with a predetermined load It is intended to ensure folding and / or movement. Further, it is intended to eliminate various impacts or to eliminate the above-described adverse effects based on these impacts.

The second aspect of the present invention includes 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 casing of the reclining mechanism, and the spring is connected to the one end and / or Or, when the seat back is tilted backwards, the movement of the other end is restricted, and the one end and / or the other end of the spring is moved in the opposite direction, the spring is tensioned, and the seat back is tilted forward. In the seat reclining device configured to move in the opposite direction to relax one end and / or the other end of the spring and relax the spring, a tension and / or relaxation relationship of the spring is provided in the casing of the reclining mechanism. The tooth portion on the driven side of the transmission medium and the link with one end locked to the seat back frame It is a seat reclining device provided with the load adjustment structure of the seat back comprised by the relationship with the external tooth part of the transmission side provided in the other end.

The inventions of claims 3 and 4 achieve the object of claim 2 and provide an optimum structure of the tooth portion on the driven side and the external tooth portion on the transmission side to achieve the object. Intended.

Claim 3 is a seat reclining device provided with a seat back load adjustment structure configured to adjust the load according to the shape change relationship between the driven tooth portion according to claim 2 and the transmission external tooth portion. It is.

According to a fourth aspect of the present invention, there is provided a seat reclining device provided with a seat back load adjustment structure configured to adjust the load in accordance with the number of teeth by the driven-side tooth portion according to claim 2 and the transmission-side outer tooth portion. It is.

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 mechanism, and the spring has one end and / or Alternatively, the movement of the other end is restricted, and when the seat back is moved backward, it moves in the opposite direction to tension one end and / or the other end of the spring, the spring is tensioned, and when the seat back is moved forward, In the seat reclining device configured to move in the opposite direction to relax one end and / or the other end and relax the spring ,
The lock mechanism and the casing are configured to be detachable using the fitting relationship between the receiving piece and the locking piece ,
Further, the spring is moved in an opposite direction for tensioning one end and / or the other end, and the spring is tensioned, and when the seat back is moved forward, the spring is moved in an opposite direction for relaxing one end and / or the other end. The other end of the spring is secured to one hook piece projecting from the seat back frame, and the other end of the spring is secured to the other transmission medium having a driven tooth portion pivotally supported by the casing of the lock mechanism. engaged with the hooks, meshes with the teeth of the driven side of the transmission medium, and having a fitting structure of the lock mechanism and the casing where the structure of the link having the outer tooth portion is loosely fitted to the pin of the seat back frame It is a seat reclining device.

Therefore, according to the first aspect , one end of the spring is locked to one hook piece of the movable seat back frame (seat back), and the other end is locked to the other hook piece movably provided on the seat back frame shaft. 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 is tilted backward (retracted, that is, flat). When the front is tilted (advanced, ie, folded), it is possible to quickly and surely stand up and / or move the seat back frame, or the seat back by restricting the spring so that one end and the other end of the spring are opposed to each other. The feature is that it can be folded and / or moved smoothly. In addition, there are practical benefits such as eliminating various impacts, or solving the above-mentioned adverse effects based on these 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. There are features such as. Further, there are practical benefits such as easy and quick assembly of the lock mechanism and the casing of the seat reclining device. Further, claim 1 is characterized in that this object can be achieved, and that the most suitable spring regulation and / or function can be achieved to achieve this object.

The invention of claim 2 has 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 casing of the reclining mechanism, and the spring has one end and / or Alternatively, the movement of the other end is restricted, and when the seat back is moved backward, it moves in the opposite direction to tension one end and / or the other end of the spring, the spring is tensioned, and when the seat back is moved forward, In the seat reclining device configured to move in the opposite direction to relax one end and / or the other end and relax the spring,
Regarding the tension and / or relaxation relationship of the spring, the driven side tooth portion of the transmission medium provided in the casing of the reclining mechanism, and the transmission side external tooth portion provided at the other end of the link having one end locked to the seat back frame The seat reclining device provided with the load adjustment structure of the seat back configured by the relationship.

Accordingly, the second 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 seat back frame shaft, The one and / or the other hook piece is movable with a predetermined load in a direction in which one end and the other end of the spring face each other when the seat back frame is tilted backward, and when the seat back frame is tilted forward, The regulation of the spring that moves in the direction where the one end and the other end face each other allows quick and reliable standing and / or movement of the seat back frame with a predetermined load, or gentle and reliable with a predetermined load of the seat back. There are features such as easy folding and / or movement. In addition, there are practical benefits such as eliminating various impacts, or solving the above-mentioned adverse effects based on these impacts.

The invention according to claim 3, the seat reclining having a tooth portion of the driven side of claim 2, the load adjusting structure of the seat back that is configured to adjust the load in relation to the shape change caused by the external teeth of the transmission side Device.

A fourth aspect of the present invention, the seat reclining having a tooth portion of the driven side of claim 2, the load adjusting structure of the seat back that is configured to adjust a load in the relationship between the number of teeth by the outer toothing of the transmission side Device.

Therefore, claims 3 and 4 have the characteristics that the object of claim 2 can be achieved, and the structure of the tooth part on the driven side and the outer tooth part on the transmission side that are optimal for achieving this object can be provided. .

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

  First, in the schematic side view of an example showing a part and / or the whole of each type of seat shown in FIGS. 1-1 to 1-3, A is a vehicle seat, A1 is a seat cushion of the seat A, A2 shows the seat back of the sheet A. In addition, B is a lock mechanism, and the lock mechanism B includes a lock / unlock mechanism that controls standing, folding, and the like of the seat A provided on the seat back frame A3. Further, the lock mechanism B is provided with return means such as a spring (not shown) for controlling the return of the operation handle C. In the figure, E indicates a headrest.

  Next, FIG. 2-1 shows a correlation between a standard load of the seat A and a spring described later based on the basic form of the seat A shown in FIGS. 1-1 to 1-3. The rotation locus is the rotation of the sheet A, the inclined line is the angle of the sheet A, and the position indicated by the numerical value 0 is an optimum position for the spring of the sheet A to be substantially opened (spring reaction) L1 and L2 respectively indicate a link and a character indicating the distance between the axes of the transmission medium, and the involute curve (tentative name) is desirable for the load trajectory of the seat A. It is a form. A hatched portion in the drawing indicates an area that uses the reaction of the spring. FIG. 2-2 is a plan view of the shape of the external tooth portion of the link and the tooth portion on the driven side of the transmission medium. In the drawing, L1-1 to L1-n and L2-1 to L2-n are The distance between the shaft and the external teeth of the link and the distance between the shaft and the teeth of the transmission medium are expressed as angles, respectively, and the numerical values of L1 and L2 are fixed.

  The basic structure shown in FIGS. 3-1 to 3-3 and FIGS. 4-1 to 4-3 described later based on FIGS. The relationship between the seat back frame A3 and the link mechanism and / or the spring has been described. First, FIG. 3-1 to FIG. 3-3, FIG. 3-1 is a schematic side view of the seat A at the angle of the standard seating position, FIG. 3-2 is a schematic side view of the rearward tilted state, and FIG. 3 is a schematic side view of the forward inclined state. Further, FIGS. 4-1 to 4-3 are the following, FIG. 4-1 is a schematic side view of the seat A at the angle of the standard seating position, FIG. 4-2 is a schematic side view of the rearward tilted state, and FIG. -3 is a schematic side view of the forward tilt state.

  First, a preferable configuration shown in an example of FIGS. 3-1 to 3-3 will be described. Reference numeral 1 denotes a casing of a reclining mechanism, and the casing 1 is fitted and fixed to the casing body 100. The casing body 100 is detachable as shown in FIGS. 7-3 and 7-4, which will be described later. It is provided so as not to come out reliably and inadvertently using the locking means. In the casing 1, a support piece 101 (shown in FIG. 7A, FIG. 7B, etc.) cut out and protruded from the casing main body 100 through press molding, and the support piece 101 A transmission medium 3 having a driven-side tooth portion 30 supported on the provided shaft 2 on its lower surface, a spring 4 having the other end 41 engaged with the other hook piece 31 provided on the transmission medium 3, and the spring 4 A hook piece 5 provided on the seat back frame A3 to which one end 40 of the transmission medium 3 is locked, and a link 7 having an external tooth portion 70 screwed to the driven tooth portion 30 of the transmission medium 3 at one end 7a. The pin 8 is provided with a cushion material 80 to which a long hole 71 provided in the other end 7b of the link 7 is loosely fitted. 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. 3-1 to 3-3, the transmission medium 3 has the other hook piece 31 on the right side as viewed in the drawing, and the driven tooth portion 30 on the left side as viewed in the drawing. The external tooth portion 70 of the link 7 is located on the driven tooth portion 30 located on the left side of the link 7, and a slight gap between the main body B 1 and the spring 4 is used to make this link 7. It is set as the structure which aims at installation and reliable movement. 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.

  In the above configuration, the rearward tilt and / or forward tilt will be described. When the seat A in FIG. 3A 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. FIG. 3-2 shows a state (full flat state) in which the tightening can be achieved and the seat back A2 is finally tilted backward. 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. The state in which the seat back A2 can be returned and the seat back A2 returns to the standard seating position is the first FIG. 3-1. 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. In the process in which the seat back A2 shown in FIGS. 3-3 to 3-1 returns to the standard seating position first, the movement of the one hook piece 5 and the other hook piece 31 in the opposite direction is performed. In this configuration, the spring 4 is tensioned through the movement of the seat back A2 and the movement of the seat back A2 toward the quick forward tilt direction is ensured.

  The following FIGS. 4-1 to 4-3 are basically the same as FIGS. 3-1 to 3-3 in principle, and the different configuration will be described. The external tooth portion 70 is positioned above the shaft 2 provided on the seat back frame A3, and the tooth portion 30 of the transmission medium 3 is also above the shaft 2, and this meshing relationship is performed above the shaft 2. It is a configuration. In this configuration, the link 7 can be freely moved over a wide range without being restricted by the transmission medium 3, and is easy on the structure, easy to manufacture and / or assemble, etc., or more restrictive on the spring 4. And / or features such as ensuring a gradual return. In addition, there are benefits that can be achieved by reducing the weight of the link 7, saving materials, facilitating manufacture and / or assembly, making effective use or miniaturization of space, and ensuring economic efficiency. Other configurations and / or actions are the same as those described above.

  FIG. 5A to FIG. 5D show an example of meshing between the driven-side tooth portion 30 and the external tooth portion 70, and correspond to the respective sheets A shown in FIGS. 1-1 to 1-3. The example which can be respond | corresponded and can respond to the load of each aspect shown to FIGS. 2-1 is shown, The specific example is demonstrated as a 1st plan to a 4th plan. FIG. 5A is a first proposal, in which the driven tooth portion 30 has a gentle waveform (upward to the left in the drawing), and the corresponding external tooth portion 70 has a substantially symmetrical waveform, As shown in the figure, since the meshing is performed at the partial portion, it is possible to cope with the stress change. FIG. 5B is a second plan, in which the driven tooth portion 30 has a gentle waveform (upward to the drawing), and the corresponding external tooth portion 70 has a substantially symmetrical waveform, Since the tooth portion 30 and the external tooth portion 70 are partially different in size, for example, as shown in the drawing, the tooth portion 30 and the external tooth portion 70 are meshed at partial locations, so that it is possible to cope with stress changes. Although not shown, there may be an example in which the tooth size is changed between the tooth portion 30 and the external tooth portion 70 in response to the stress change. FIG. 5-3 is a third plan, in which the driven-side tooth portion 30 has a substantially oval shape, and the corresponding external tooth portion 70 has a dish-shaped concave shape. Since it becomes meshing, it can respond to a stress change. FIG. 5-4 is the fourth plan, in which the driven-side tooth portion 30 is substantially flat and the external tooth portion 70 corresponding thereto is a substantially curved convex shape. Therefore, it can cope with stress change. In any case, any configuration can be adopted as long as the configuration includes the meshing structure and / or form of the driven tooth portion 30 and the external tooth portion 70 that can correspond to each sheet A and can secure a load. The relationship between the driven-side tooth portion 30 of the first to fourth plans described above and the external tooth portion 70 corresponding thereto is an example, and other configurations having similar mechanisms and / or effects. Is also within the scope of the present invention.

  Next, FIGS. 6-1 to 6-3 are preferable examples of the spring 4. The spring 4 is given rigidity, or the contact area is reduced to reduce friction and ensure smooth movement. 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. 7-1 is a schematic side view of a part of the main part of XX in a state where the locking mechanism and the reclining device shown in FIG. 3-1 are attached, and FIG. 1 is a sectional view showing a disassembled state of FIG. 1, in which a casing main body 100 is detachably provided on a main body B1, and is formed by bending a casing main body 100 on a receiving piece 102 provided on the main body B1. It is the structure which enables engagement / disengagement of the locking piece B2. In addition, the structure which enables engagement / disengagement of the locking piece B2 which is formed by bending the receiving piece 102 provided in the casing main body 100 on the main body B1 is not shown. 7-3 is a side view of the mounting state schematically shown in the opposite direction from the YY direction of FIG. 7-1, and FIG. 7-4 is a schematic view from the ZZ direction of FIG. FIG. 8 is a side view of the mounting state shown, and there are various conceivable configurations in which the engaging piece B2 can be engaged with and disengaged from the receiving piece 102. Therefore, a preferred example is shown in FIG. This will be explained in the fifth plan up to 5-4. In the figure, reference numeral 11 denotes a support portion such as a hole or a protrusion provided in the casing main body 100, and the casing main body 100 (casing 1) is supported by an automatic assembly means such as a robot (not shown) using the support portion 11. In addition, the casing main body 100 can be attached to the main body B1 of the lock mechanism B.

  FIG. 8-1 is a first proposal, and the receiving piece 102 provided in the main body B1 (casing main body 102) includes an expanded guide tongue 102a, a receiving recess 102b, and a locking hole opened in the receiving recess 102b. 102c, a locking bent portion 102d provided at a connecting portion between the guide tongue portion 102a and the receiving recess portion 102b, and a connecting bent portion 102e connecting the guide tongue portion 102a, the main body B1, and the receiving recess portion 102b. And this receiving piece 102 is comprised by press work from main body B1. The locking piece B2 provided on the casing main body 100 (main body B1) inserted into the receiving piece 102 swells in a tapered shape from the first locking end B2-1 and the first locking end B2-1. The protruding locking projection B2-2, the second locking end B2-3 lowered from the locking projection B2-2, the first locking end B2-1, the locking projection B2- 2 and the second locking end portion B2-3 are configured by a bent portion B2-4 provided in the casing main body 100 that holds the space 2 at an interval. In this configuration, when the first locking end B2-1 expands the guide tongue 102a and reaches the receiving recess 102b (when fitted), the first locking end B2-1 is connected and bent. The second locking end B2-3 substantially stops against the locking bent portion 102d, and the second locking end B2-3 substantially stops against the portion 102e. As one side is normal). At substantially the same time as this stop, the locking projection B2-2 is fitted into the locking hole 102c. Therefore, the casing body 100 (casing 1) is attached to the main body B1 by the above-mentioned stopper, fitting of the locking piece B2 into the receiving concave portion 102b, and fitting of the locking convex portion B2-2 into the locking hole 102c. Can be attached with one touch, or, as described above, automatic assembly such as robot operation is possible. In this example, since this operation and / or assembly is performed at three locations, reliable assembly (attachment) and efficient assembly without the risk of rattling and / or removal are possible. There are real benefits such as being able to plan (other examples are the same). And the said removal is easily performed by the reverse of the expansion of the guidance | induction tongue part 102a, and the above-mentioned operation. Such attachment and / or removal operation can be performed freely and arbitrarily.

Next, FIGS. 8-2-1 to 8-2-2 are the second plan, which is the same as the first plan in principle, and the differences will be described. In this example, a wedge-shaped locking receiving side 102c-1 is formed in the locking hole 102c by means of two presses (first press processing and second press processing) and / or cutting, and the other locking protrusion is formed. An anti-wedge shaped locking insertion side B2-2-1 is formed in the portion B2-2. And it is the structure which carries out latching engagement of the other party's latching insertion edge B2-2-1 to this latching reception edge | side 102c-1. Two presses are used to form the locking receiving side 102c-1 (shown in FIG. 8-2-2), and a cutting means is used to form the locking insertion side B2-2-1. To do. In addition, the engagement engagement relationship between the engagement receiving side 102c-1 and the engagement insertion side B2-2-1 in this configuration takes into account the bending of the reception piece 102 and the prevention of the engagement piece B2 from coming off. While maintaining this relationship, it is intended to maximize its purpose. The bending of the receiving piece 102 is effective in an example in which the receiving piece 102 is integrally formed from the main body B1 by press molding. For example, a horizontal return force illustrated by a virtual line acts. The arrow “d” in the figure indicates the two press directions. Other configurations and / or effects are in accordance with the first proposal.
Further, the configuration of FIGS. 8-3-1 to 8-3-3 is the third plan, which is in principle the same as the first plan described above, and the differences will be described. In this example, a wedge-shaped engagement receiving side 102d-1 is formed in the engagement bent portion 102d by means of two presses and / or cuts, and the other second engagement end B2-3 is anti-wedge-shaped. The locking insertion side B2-3-1 is formed. And it is the structure which engages and engages the other party's latch insertion edge B2-3-1 in this latch receiving edge 102d-1. It should be noted that two presses are used to form the locking receiving side 102d-1 (shown in FIG. 8-3-2), and a cutting means is used to form the locking insertion side B2-3-1. To do. In addition, the engagement fitting relationship between the engagement receiving side 102d-1 and the engagement insertion side B2-3-1 in this configuration takes into account the bending of the reception piece 102 and the prevention of the engagement piece B2 from coming off. While maintaining this relationship, it is intended to maximize its purpose. The bending of the receiving piece 102 is effective in an example in which the receiving piece 102 is integrally formed from the main body B1 by press molding. For example, a horizontal return force illustrated by a virtual line acts. The arrow “d” in the figure indicates the two press directions. Other configurations and / or effects are in accordance with the first or second plan described above.

  Further, the configuration of FIGS. 8-4-1 to 8-4-3 is the fourth plan, which is the same as the first plan in principle, and the differences will be described. In this example, a wedge-shaped engagement receiving side 102e-1 is formed opposite to the engagement bent portion 102d by means of two presses and / or cuts, and the other second engagement end B2-3 is formed. And an anti-wedge shaped locking insertion side B2-4-1. And it is the structure which carries out the latching insertion of the other both latching insertion edge B2-4-1 to this both latching reception side 102e-1. It should be noted that two presses are adopted to form the both latch receiving sides 102e-1 (shown in FIG. 8-4-2), and each cut is formed to form both latch insertion sides B2-4-1. Adopt means. In addition, the engagement engagement relationship between the both latching receiving sides 102e-1 and both latching insertion sides B2-4-1 in this configuration takes into account the bending of the receiving piece 102 and the prevention of the locking piece B2 from coming off. However, it is intended to maximize the purpose while maintaining the relationship between the two. The bending of the receiving piece 102 is effective in an example in which the receiving piece 102 is integrally formed from the main body B1 by press molding. For example, a horizontal return force illustrated by a virtual line acts. The arrow “d” in the figure indicates the two press directions. Other configurations and / or effects are in accordance with the above-mentioned first to third plans.

  And the structure of FIGS. 8-5-1 to FIGS. 8-5-4 is the fifth plan, and is the structure which united the above-mentioned second plan and the third plan, and three presses (third press work) Form with. The configuration, features, and / or operations of this fifth plan are the same as those of the second to fourth plans.

  The relationship between the receiving piece 102 of the first to fifth proposals described above and the locking piece B2 corresponding thereto is an example, and other configurations having similar mechanisms and / or effects are also present. It is a category of the invention. For example, the connecting bent part 102e is inclined (locking receiving side), and the first locking end B2-1 of the locking projection B2-2 is inclined (locking insertion side). Structure, or a combination structure of the above-described first to fifth plans, etc., locking receiving sides 102c-1, 102d-1, 102e-1, or locking insertion sides B2-2-1, B2-3- 1. Various aspects such as a change structure of the shape of B2-4-1 are possible. By adopting each of these structures, the enhancement of the functions and / or effects described above can be expected.

FIG. 1-1 is a schematic side view of an example showing a part of a sheet. FIG. 1-2 is a schematic side view of an example showing the entire two-row sheet. 1-3 is a schematic side view showing the entire three-row sheet. FIG. 2-1 is a diagram showing a correlation between a standard seat load and a spring based on the basic seat configuration shown in FIGS. 1-1 to 1-3. FIG. 2-2 is a plan view of the shape of the external tooth portion of the link and the tooth portion on the driven side of the transmission medium. Fig. 3-1 is a schematic side view of the seat at the standard seating position angle. Fig. 3-2 is a schematic side view of the tilted state Fig.3-3 is a schematic side view of the forward tilted state Fig. 4-1 is a schematic side view of the seat at the standard seating angle. Fig.4-2 is a schematic side view of the tilted state 4-3 is a schematic side view of the forward tilted state FIG. 5-1 is an enlarged schematic diagram of the first plan by meshing between the teeth of the transmission medium and the external teeth of the link. FIG. 5-2 is an enlarged schematic view of the second plan by meshing between the teeth of the transmission medium and the external teeth of the link. FIG. 5-3 is an enlarged schematic diagram of the third plan by meshing between the teeth of the transmission medium and the external teeth of the link. FIG. 5-4 is an enlarged schematic view of the fourth plan by meshing between the teeth of the transmission medium and the external teeth of the link. FIG. 6A is a schematic diagram assuming a fitting state showing a preferable example of a spring. FIG. 6B is an enlarged cross-sectional view of the main part of FIG. FIG. 6-3 is a schematic diagram of FIG. 6-1 developed. FIG. 7-1 is a schematic side view of a part of the main part of XX in an attached state of the locking mechanism and the reclining device shown in FIG. 7-2 is a cross-sectional view showing the exploded state of FIG. FIG. 7-3 is a side view of the mounting state schematically shown in the opposite direction from the YY direction of FIG. 7-4 is a side view of the mounting state schematically shown from the ZZ direction of FIG. FIG. 8-1 is a schematic plan sectional view of the first plan showing the relationship between the receiving piece of the locking mechanism and the locking piece of the casing body. FIG. 8-2-1 is a schematic plan sectional view of the second plan showing the state of the first press working of the receiving piece of the lock mechanism. Fig. 8-2-2 is a schematic plan cross-sectional view of the second plan showing the state of the second pressing of the receiving piece of the lock mechanism FIG. 8-2-3 is a schematic plan sectional view of the second plan showing the relationship between the receiving piece of the locking mechanism and the locking piece of the casing body. Figure 8-3 -1 third draft plan sectional schematic view showing a state of the first pressing of the receiving piece of the locking mechanism FIG. 8-3-2 is a schematic plan sectional view of the third plan showing the state of the second pressing of the receiving piece of the locking mechanism. Fig. 8-3-3 is a schematic plan sectional view of the third plan showing the relationship between the receiving piece of the locking mechanism and the locking piece of the casing body. FIG. 8-4-1 is a schematic plan sectional view of the fourth plan showing the state of the first press working of the receiving piece of the lock mechanism. FIG. 8-4-2 is a schematic plan sectional view of the fourth plan showing the state of the second pressing of the receiving piece of the locking mechanism. FIG. 8-4-3 is a schematic plan sectional view of the fourth plan showing the relationship between the receiving piece of the locking mechanism and the locking piece of the casing body. FIG. 8-5-1 is a schematic plan sectional view of the fifth plan showing the state of the first press working of the receiving piece of the lock mechanism. FIG. 8-5-2 is a schematic plan sectional view of the fifth plan showing the state of the second pressing of the receiving piece of the lock mechanism. FIG. 8-5-3 is a schematic plan sectional view of the fifth plan showing the state of the third press working of the receiving piece of the lock mechanism. FIG. 8-5-4 is a schematic plan sectional view of the fifth plan showing the relationship between the receiving piece of the locking mechanism and the locking piece of the casing body.

A Seat A1 Seat cushion A2 Seat back A3 Seat back frame B Lock mechanism B1 Main body B2 Locking piece B2-1 First locking end B2-2 Locking protrusion B2-2-1 Locking insertion side B2-3 First Two locking end portions B2-3-1 Locking insertion side B2-4 Bending portion B2-4-1 Locking insertion side C Operation handle D Virtual inclined line E Headrest 1 Casing 100 Casing body 101 Supporting piece 102 Receiving piece 102a Guide tongue 102b Receiving recess 102c Locking hole 102c-1 Locking receiving side 102d Locking bent part 102d-1 Locking receiving side 102e Linked bending part 102e-1 Locking receiving side 2 shaft 3 Transmission medium 30 Tooth part 31 Other hook piece 4 Spring 40 One end 41 Other end 42 Convex strip 43 Concave strip 5 One hook strip 7 Link 7a One end 7b The other end 7 Length external teeth 71 holes 72 shaft 8 pin 80 cushion material 10 stopper 11 supporting portion

Claims (4)

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 casing of the reclining mechanism, and the spring is connected to the one end and / or the other end. When the seat back is moved backward, it is moved in the opposite direction to tension one end and / or the other end of the spring, the spring is tensioned, and when the seat back is moved forward, In the seat reclining device configured to move in the opposite direction to relax one end and / or the other end and relax this spring ,
The lock mechanism and the casing are configured to be detachable using a fitting relationship between the receiving piece and the locking piece ,
Further, when the seat back is moved forward, the one end and / or the other end of the spring is tensioned, and when the seat back is moved forward, the one end and / or the other end of the spring is relaxed. a configuration to move, with the spring end of the sealed solid in one of hooks projecting from the seat back frame, and the teeth of the driven side which is pivotally supported on the casing of the locking mechanism and the other end of the spring A lock mechanism configured to engage with the other hook piece provided on the transmission medium, mesh with a driven tooth portion of the transmission medium, and loosely fit a link having an external tooth portion to a pin of the seat back frame Reclining device provided with a fitting structure for the casing and the casing. 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 casing of the reclining mechanism, and this spring moves the one end and / or the other end. When the seat back is moved backward, 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 moved. And / or in the seat reclining device configured to move in the opposite direction to relax the other end and relax this spring,
The tension and / or relaxation relationship of the spring is determined based on the outer side of the transmission side provided at the other end of the link on the driven side of the transmission medium provided on the casing of the reclining mechanism and one end locked to the seat back frame. A seat reclining device including a seat back load adjustment structure configured in relation to a tooth portion. A seat reclining device provided with a seat back load adjustment structure configured to adjust a load in accordance with a shape change relationship between the driven-side tooth portion according to claim 2 and the transmission-side external tooth portion. A seat reclining device provided with a seat back load adjustment structure configured to adjust the load according to the number of teeth by the driven-side tooth portion according to claim 2 and the transmission-side external tooth portion.

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