JP4488839B2 - Armrest mounting method and mounting configuration - Google Patents

Description

  The present invention relates to an armrest in which the tip position of the armrest is displaced from the use position to the retracted position, and the tip height is arbitrarily adjustable.

Conventionally, a lock spring having a fixed end at one end and a free end at the other end, which locks the rotation of the armrest with a frictional resistance, a shaft for fitting the coil portion of the lock spring to the outer periphery, and fixed to the armrest And a spring mounting bracket having a switching cam groove for switching the coil portion between a locked state and an unlocked state by connecting and disconnecting the free end, and an unlocking contact for fitting the free end to the switching cam groove. It consists of a contact member and an abutment member provided with an unlocking part that releases the free end fitted in the switching cam groove and returns to the free state, and rotates around the shaft axis in the left-right direction It is known that the height of the armrest that is freely attached is adjusted using the friction of a coil spring (Patent Document 1).
JP 2003-299547 A

The known example has a problem that the shaft and the armrest are not easily assembled in advance because the shaft is fixed to the dorsal bracket and the armrest is rotatably attached to the shaft, and the assembly is troublesome. .
In the present application, a lock device including a shaft is incorporated in advance into an armrest to constitute an assembly, which facilitates assembly, storage, and management.

In the present invention, an outer engagement protrusion 20 is formed at the outer end of the shaft 7 and an inner engagement protrusion 57 is formed at the inner end of the shaft 7. The burring portion 16 of the bracket 14 is brought into contact with only the rotation, the insertion protrusion 26 of the plate 25 is inserted into the engagement protrusion 20, and the plate 25 is brought into close contact with the spring mounting bracket 14, so that the shaft 7 and The shaft 7 and the plate 25 are fixed in a state where the spring mounting bracket 14 is sandwiched by the plate 25, and the rotation of the armrest 4 is locked to the outer periphery of the shaft 7 inside the spring mounting bracket 14 by friction resistance. The coil portion 31 of the lock spring 30 is fitted, and the fixed-side end portion 33 at one end of the lock spring 30 is fixed to the spring mounting bracket 14. The other end of the lock spring 30 is connected to the switching cam groove 38 of the spring mounting bracket 14 to form a free end 35 for switching the coil portion 31 between a locked state and an unlocked state. An unlocking contact portion 47 for fitting the free end 35 in the switching cam groove 38 and the free end 35 fitted in the switching cam groove 38 are disengaged from the engagement protrusion 57 at the inner end and in a free state. The engagement holes 56 of the abutting members 45 provided with the unlocking portions 50 to be restored to each other are engaged and the engagement protrusions 57 are caulked and fixed, and then the spring mounting bracket 14 is attached to the back. The bracket 6 is fixed to the inner surface, and then the engagement hole 62 of the armrest frame 60 is engaged with the engagement protrusion 20 of the outer end of the shaft 7, and in this state, the fastening member 66 from the outside of the armrest frame 60. It is obtained by the structure and mounting method of the seat armrest vehicle to secure more the backrest bracket 6.
In the present invention, the shaft 7, the plate 25, the spring mounting bracket 14, the lock spring 30, and the abutting member 45 are assembled to form a subcomp A, and the spring mounting bracket 14 of the subcomp A is attached to the back. A bracket comp B is configured by being fixed to the inner surface of the heel bracket 6, and the bracket comp B is fixed to the outer surface of the dorsum rib skeleton frame 5 of the dorsal fin seat 3. The armrest assembly C is configured by performing surface treatment, and the armrest assembly C is fixed to the bracket comp B by the fastening member 66 from the outside of the opening 65 of the armrest assembly C. It is a thing.
In the present invention, a lock spring 30 having a fixed-side end portion 33 at one end and a free end 35 at the other end, which locks the rotation of the armrest 4 with frictional resistance, and a coil portion 31 of the lock spring 30 are fitted to the outer periphery. The shaft 7 to be locked, the spring mounting bracket 14 for rotatably mounting the outer end side of the shaft 7, and the free end 35 formed on the spring mounting bracket 14 are connected and detached to lock the coil portion 31. A switching cam groove 38 for switching between a state and an unlocked state, an unlocking contact portion 47 for fitting the free end 35 in the switching cam groove 38, and a free end 35 fitted in the switching cam groove 38. And an abutment member 45 provided with an unlocking portion 50 that is released to return to a free state, and an engaging projection 20 is provided on the outer end of the shaft 7. Engagement protrusions 57 are respectively formed at the ends, and a stepped portion 10 is formed at the intermediate portion in the longitudinal direction of the shaft 7 so that the burring portion 16 of the spring mounting bracket 14 abuts. An engagement hole 56 formed in the contact member 45 is engaged and fixed, an insertion hole 26 of the plate 25 is inserted and fixed in the engagement protrusion 20 of the shaft 7, and the plate 25 is fixed to the spring mounting bracket 14. at a state of being approximately in contact, the spring mounting bracket 14 more rotatably clamped to the plate 2 5 and the step portion 10 of the shaft 7, the spring mounting bracket 14 on the outer surface of the back凭骨case frames 5 The armrest assembly C is fixed to the inner surface of the fixed dorsal bracket 6, and the outer end of the shaft 7 is subjected to surface treatment such as covering the outer skin member of the armrest frame 60. With a is obtained by the armrest mounting arrangement.
According to the present invention, the armrest assembly C has an engagement hole 62 that engages with the engagement protrusion 20 at the inner end of the shaft 7 in the armrest frame 60, and the engagement hole 62 engages with the engagement protrusion 20. In this state, the vehicle seat armrest is configured to be fixed to the back bracket 6 from the outside of the opening 65 of the armrest assembly C by the fastening member 66.

In the first aspect of the invention, the shaft 7, the lock spring 30, and the contact member 45 can be incorporated (attached) in advance on the outer surface of the dorsal skeleton frame 5 of the dorsal seat 3, and the armrest assembly including the lock device can be used. Easy assembly, storage and management.
In the invention of claim 2, since it is constituted by the subcomp A, the bracket comp B and the armrest assembly C, the assembly, storage and management can be further facilitated, and the armrest can be replaced by replacing the bracket with the subcomp A not attached. Immediately adapts to seats that are not fitted, improving versatility.
In the invention of claim 3, the armrest including the lock device can be realized with a simple configuration.
In the invention of claim 4, the armrest assembly can be easily attached to the backrest seat 3.

An embodiment of the mounting method according to the present invention will be described with reference to the drawings of an example of a vehicle seat. A seat 4 is an armrest provided on the side portion of the dorsal seat 3.
For example, the armrest 4 is configured to lock the downward rotation of the armrest 4 in the originally used usage range A to support the load, and to allow only the upward rotation to be adjustable in height. In the storage range B that is the same as or spaced from the position, the storage range B is unlocked and can be turned up and down, and can be turned downward from the storage range B to the lowest position of the use range A. It is preferable to improve the operability by returning to the lockable state at the lower position so that only upward rotation is possible in the use range A (FIG. 1).
The armrest 4 is attached to a dorsal bracket 6 provided on the side of the dorsal skeleton frame 5 of the dorsal seat 3 so as to be rotatable up and down around a shaft 7 in the left-right direction. The shaft 7 is formed with a step portion 10 in the middle (FIG. 4), the shaft 7 on one side of the step portion 10 is formed on the large diameter portion 11, and the shaft 7 on the other side of the step portion 10 is formed on the small diameter portion 12. (FIG. 4).
The shaft 7 is attached to the spring mounting bracket 14. The side plate 15 of the spring mounting bracket 14 is formed with a cylindrical burring portion 16 projecting inward (backward skeleton frame 5 side). The inner diameter of the burring portion 16 is the same as the outer diameter of the small diameter portion 12 of the shaft 7, the small diameter portion 12 is inserted into the through hole 17 of the burring portion 16, and the end surface 18 of the burring portion 16 is inserted into the end surface 18 of the shaft 7. The step 10 is brought into contact.
A plurality of engaging grooves 19 and engaging protrusions 20 are alternately formed in the circumferential direction by notching the distal end of the small diameter portion 12 in the generatrix direction (FIG. 4).
Each engagement protrusion 20 of the shaft 7 is inserted into each insertion hole 26 of the plate 25.

Accordingly, a projection projection 28 having a predetermined height (size) from the groove bottom surface 27 is formed on the groove bottom surface 27 of the groove bottom of the engagement groove 19. The shaft 7 inserted through the through-hole 17 of the burring portion 16 energizes the shaft 7 and the plate 25 in a state where the engagement protrusion 20 of the small diameter portion 12 of the shaft 7 is inserted into the insertion hole 26 of the plate 25, Projection welding performed by concentrating on the projection projection 28.
In this case, the projection protrusions 28 are formed on the groove bottom surface 27, the distance from the outer surface of the side plate 15 to the end surface 18 of the through hole 17 is “P” (FIG. 4), and the height of the projection protrusion 28 from the groove bottom surface 27 is set. When “Q” is set (FIG. 4) and the interval from the step portion 10 to the groove bottom surface 27 is set to “R” (FIG. 4), “P <R + Q” before welding, but the projection protrusions 28 are crushed during welding. Then, the height of the projection projection 28 after welding is changed to “Q ′”, thereby configuring “P = R + Q ′” (FIG. 6).
Accordingly, the projection projection 28 is melted and crushed during welding under appropriate welding conditions such as current value and pressure, and the height Q ′ of the crushed projection projection 28 and the step portion 10 of the shaft 7 and the groove bottom surface 27 are reduced. The interval R coincides with the height P of the burring portion 16, and the plate 25 is in close contact with the side plate 15 of the spring mounting bracket 14, and the setting at the time of welding is easy. The gap between the shaft 7 and the plate 25 is made zero to prevent the shaft 7 from rattling against the spring mounting bracket 14, and as a result, the tip of the armrest 4 is prevented from swinging in the left-right direction.

Thus, the armrest 4 is provided with a locking device L between the base portion of the armrest frame 13 and the dorsal bracket 6. The locking device L is configured so that the coil portion 31 of the lock spring 30 is fitted to the outer periphery of the large-diameter portion 11 of the shaft 7, locked by friction of the lock spring 30, and unlocked by friction release so that the inclination can be adjusted. Constitute.
One end of the lock spring 30 is fixed to a predetermined position of the spring mounting bracket 14 by a stay 32 and formed on the fixed side end portion 33. The other end of the lock spring 30 is formed at the free end 35, and the coil portion 31 is set in a winding direction to be tightened when the fixed-side end portion 33 rotates with the downward movement of the armrest 4. Even if it is the end 35, if the armrest 4 is rotated downward, the diameter of the coil portion 31 is reduced by the frictional resistance between the outer periphery of the large-diameter portion 11 and the burring portion 16 of the shaft 7 and the inner periphery of the coil portion 31. The armrest 4 is prevented from rotating downward by this frictional resistance and locked.
The spring mounting bracket 14 includes an unlock cam surface 36 that holds the free end 35 of the lock spring 30 in the unlock position, and a guide cam surface 37 that guides the engagement with the unlock cam surface 36. The switching cam groove 38 having the above is formed.
The switching cam groove 38 is formed in the bent plate portion 39 of the spring mounting bracket 14 bent so as to be substantially parallel to the axial direction of the shaft 7.
The bent plate portion 39 is bent to the right in the lower edge of the spring mounting bracket 14 in FIG.

Accordingly, the unlock cam surface 36 of the switching cam groove 38 is formed to be inclined at a predetermined angle θ as it goes inward with respect to the axial direction of the shaft 7. The predetermined angle θ is preferably about 10 degrees of inclination. A guide cam surface 37 that is inclined so as to increase in the opening direction (left direction) of the switching cam groove 38 is formed on the downward rotation direction side of the switching cam groove 38.
A gap 41 through which the free end 35 can pass is provided between the inner end E of the unlocking cam surface 36 and the tip F of the guide cam surface 37.
Further, the front end portion F of the guide cam surface 37 is configured to be located on the inner side and the front side of the inner end portion E of the unlock cam surface 36.
That is, the front end F of the guide cam surface 37 is positioned so as to overhang the inner front portion E with respect to the inner end E of the unlocking cam surface 36, and reliably abuts the free end 35 for guidance. Like to do.

Therefore, a contact member 45 that contacts the free end 35 by the rotation of the armrest 4 is provided at the end of the large-diameter portion 11 of the shaft 7. The abutting member 45 fixes a plate member 46 in a direction intersecting the axis of the shaft 7 to the end of the large diameter portion 11 of the shaft 7, and the free end 35 is fitted into the switching cam groove 38 on the plate member 46. An unlocking contact portion 47 to be engaged (engaged) is provided. When the unlocking contact portion 47 contacts the free end 35 in the locked state, the free end 35 pushed by the unlocking contact portion 47 is guided by the guide cam surface 37 and is fitted into the switching cam groove 38. .
As a result, the free end 35 engages with the unlocking cam surface 36, and the coil portion 31 of the lock spring 30 is loosened and held in the unlocked state.
The inner end portion G of the unlocking contact portion 47 is positioned outside the inner end portion E of the unlocking cam surface 36, and the free end 35 guides to the inner end portion G of the unlocking contact portion 47. When guided and moved by the cam surface 37, the free end 35 is disengaged from the unlocking contact portion 47 and fits into the switching cam groove 38, and the unlocking cam surface is caused by the elasticity of the free end 35 itself as described above. 36 abuts.
Accordingly, the front end portion of the plate member 46 is unlocked by releasing the free end 35 engaged with the unlocking cam surface 36 of the switching cam groove 38 from the unlocking cam surface 36 to return to the free state. A release unit 50 is provided. The unlocking portion 50 is formed by a bent portion 51 in which the end portion of the plate member 46 is bent toward the spring mounting bracket 14, and the bent portion 51 is formed inwardly from the front end (rear end) to the base portion (front side). An inclination release surface 52 that is inclined in the downward rotation direction side is formed, and the tip end portion H of the inclination release surface 52 is positioned so as to be outside the inner end E of the unlock cam surface 36, and the unlock cam When the surface 36 and the contact member 45 move relative to each other, the free end 35 is guided by the inclination release surface 52 of the unlock release portion 50 and detached from the unlock cam surface 36 (switching cam groove 38). , Switching from the unlocked state to the lockable state.

Thus, as described above, the spring mounting bracket 14 is welded and fixed while being sandwiched between the shaft 7 and the plate 25, and then the lock spring 30 is attached.
Next, the engagement projections 56 formed on the inner end portion of the large-diameter portion 11 of the shaft 7 are engaged with the engagement holes 56 formed on the plate member 46 of the contact member 45 and are fixed by caulking. And the contact member 45 are fixed to the fixed mounting position to constitute the sub-comp A. The spring mounting bracket 14 of the sub-comp A is brought into contact with the inner surface of the back bracket 6 and fixed by welding to constitute a bracket comp B.
On the other hand, a collar 61 is provided at the base of the armrest frame 60 of the armrest 4, an engagement hole 62 is formed around the collar 61, and surface treatment such as covering with a cushion material or a skin member is performed on the outer surface side of the armrest frame 60. The pad rest 63 is attached to constitute the armrest assembly C.
In the armrest assembly C (armrest 4), the engaging projections 20 of the shaft 7 protruding outward from the window hole 64 of the dorsal bracket 6 are engaged with the engaging holes 62, and the opening 65 of the pad member 63 is formed. A fastening member 66 such as a bolt is inserted into the collar 61 from the outside, and a screw portion 67 of the fastening member 66 is screwed onto a nut 68 fixed to the inside of the contact member 45 and attached. Reference numeral 69 denotes a concealing member that conceals the fastening member 66.

(Operation of Example)
The armrest 4 is in a use state within a use range A including a substantially horizontal position. In the use range A, once the armrest 4 is pivoted downward to a lowermost position about the shaft 7, the lock device L is in an activated state, and the armrest 4 is turned upward. Can move, but locks downward rotation to support the load.
Therefore, the armrest 4 is once rotated downward to the lowest position in the use range A, and then the armrest 4 is rotated upward as necessary to adjust the height of the armrest 4.
Next, when the armrest 4 is rotated upward to the uppermost position of the use range A, this position is the upper limit position that locks the downward rotation of the armrest 4 and supports the load. The range is B, and the storage range B is unlocked in any direction.

Thus, in order to change to the use state from the storage position, the armrest 4 may be rotated downward to the lowest position of the use range A as described above, and the lock device L may be activated. The operation (operation) is repeated.
Thus, the operation of the locking device L will be specifically described. The shaft 7 in the left-right direction is attached to the dorsal bracket 6 so as to be rotatable only, and the coil portion 31 of the lock spring 30 is attached to the outer periphery of the large-diameter portion 11 of the shaft 7. One end of the lock spring 30 is engaged with a stay 32 provided on the spring mounting bracket 14, the other end of the lock spring 30 is formed at the free end 35, and the coil portion 31 is rotated downward of the armrest 4. Accordingly, the winding direction is set so that the fixed side end portion 33 is tightened when the fixed side end portion 33 is rotated. Therefore, when the armrest 4 is rotated downward in the use range A, the free end 35 is rotated downward together with the armrest 4. The distance from the fixed side end portion 33 is narrowed, whereby a frictional resistance is generated between the inner periphery of the coil portion 31 and the outer periphery of the large diameter portion 11 of the shaft 7. The diameter of the part 31 acts to the small, to lock to prevent downward rotation of the armrest 4 in this resistor.
Therefore, the load applied to the armrest 4 is locked by restricting the downward rotation, but when the armrest 4 is rotated upward, the coil portion 31 is in a loose winding direction and the height can be adjusted freely.

Thus, when the armrest 4 is rotated upward to the uppermost position of the use range A, the contact member 45 fixed to the shaft 7 is rotated together with the armrest 4 and the unlocking contact portion 47 of the contact member 45 is free. Abutting on the end 35 (FIG. 12), the unlocking abutting portion 47 rotates and moves the free end 35.
The free end 35 moved by the unlocking contact portion 47 contacts the guide cam surface 37 of the spring mounting bracket 14 (FIG. 14).
In this case, the front end F of the guide cam surface 37 is positioned so as to overhang inside and forward of the inner end E of the unlocking cam surface 36, so that the guide cam surface 37 is free. Guide to the end 35 securely.
Thus, the free end 35 that is in contact with the guide cam surface 37 moves laterally toward the inner end G along the edge of the unlocking contact portion 47 (based on the shaft 7), and the free end 35 is unlocked. When it moves to the inner end G of the contact portion 47, the contact portion 47 is released from the unlock contact portion 47.
Since the inner end G of the unlocking contact portion 47 is located on the inner side of the distal end portion F of the guide cam surface 37, the free end 35 deviated from the inner end G of the unlocking contact portion 47 is: It fits in the switching cam groove 38 and moves vertically in the circumferential direction of the shaft 7 toward the unlocking cam surface 36 by the elasticity of the free end 35 itself (FIG. 16).

When the free end 35 is fitted into the switching cam groove 38 of the spring mounting bracket 14, the fixed side end 33 is fixed to the spring mounting bracket 14 by the stay 32. All of the free ends 35 are held so that the positional relationship does not change and the positional relationship does not change.
Therefore, when the free end 35 is fitted in the switching cam groove 38, the diameter of the coil portion 31 does not change, the locking device L is unlocked, and the armrest 4 can be rotated in any direction (up and down) ( Of course, it is free to rotate upward).
In this case, the unlocking cam surface 36 is formed so as to be inclined toward the rear side by a predetermined angle θ (about 10 degrees with respect to the shaft center of the shaft 7) as it goes inward with respect to the shaft center direction of the shaft 7. The free end 35 reliably engages with the unlocking cam surface 36, prevents lateral movement and prevents it from coming off the switching cam groove 38 unless an unlocking portion 50 of the abutting member 45 described later contacts. Prevent and keep unlocked.
Therefore, the position where the free end 35 is fitted in the switching cam groove 38 is set to the upper limit position of the use range A where the armrest 4 is originally used as the armrest 4, and therefore the storage range B beyond the use range A. As a result, the free end 35 is always engaged with the switching cam groove 38 to be unlocked.

Therefore, since the abutment member 45 is provided with the unlocking portion 50 for releasing the free end 35 fitted in the switching cam groove 38 and returning it to the free state, the lock once in the unlocked state is provided. When the device L rotates the armrest 4 downward to the lowest position in the use range A, the tilt release surface 52 of the unlock release unit 50 hits the free end 35 (FIG. 10), and further the downward rotation of the armrest 4 occurs. The tilt releasing surface 52 that moves by movement guides the free end 35 inward, and the free end 35 moves in the lateral direction (axial direction of the shaft 7) toward the inner end E while slidingly contacting the unlocking cam surface 36. Then, after passing through the inner end E of the unlocking cam surface 36, the free end 35 moves away from the switching cam groove 38 through the gap 41 (FIG. 10).
When the free end 35 is disengaged from the switching cam groove 38, as described above, the position of the free end 35 with respect to the fixed-side end portion 33 can be changed, the lock device L is activated, and the armrest 4 is rotated downward. Lock it.

In this case, the free end 35 is not only elastically deformed by the movement of the coil portion 31 in the circumferential direction, but is also elastically deformed in the lateral direction which is the axial direction of the shaft 7, so that the switching cam groove 38 is unlocked. Even if the circumferential movement is stopped due to contact with the cam surface 36, the movement may occur in the lateral direction (axial direction) and disengage from the switching cam groove 38. 36 is formed so as to be inclined approximately 10 degrees lower as it goes inward with respect to the axial direction of the shaft 7, the unlocking portion 50 of the abutting member 45 is caused by the inclination of the unlocking cam surface 36 itself. The lateral movement of the free end 35 can be prevented as long as it does not contact the free end 35, the free end 35 is prevented from coming off from the switching cam groove 38, and the unlocked state is reliably maintained.
As described above, the configuration in which the free end 35 is connected to and detached from the switching cam groove 38 is only required to provide the shape of the switching cam groove 38 and the contact member 45 that contacts the free end 35, so that the operation is reliable and inexpensive. Can be.

Further, the setting of the use range A and the storage range B can be changed only by exchanging the contact member 45 whose position (distance) between the unlock contact portion 47 and the inclination release surface 52 is changed.
Thus, the spring mounting bracket 14 is welded and fixed while being sandwiched between the shaft 7 and the plate 25, and then the lock spring 30 is mounted, and the shaft 7 is inserted into the engagement hole 56 formed in the plate member 46 of the contact member 45. Since the engagement protrusion 57 formed on the inner end portion of the large-diameter portion 11 is engaged and caulked and fixed to constitute the subcomp A, the subcomp A positions the shaft 7 and the contact member 45 relative to each other. Fix it immobile.
In this case, the shaft 7 and the plate 25 are welded and fixed so as to be rotatable only with the spring mounting bracket 14 sandwiched therebetween, so that the shaft 7 and the plate 25 on the moving side and the spring mounting bracket 14 on the fixed side are fixed. Can be assembled together.
Since the spring mounting bracket 14 of the sub-comp A is brought into contact with the inner surface of the back bracket 6 and fixed by welding to constitute a bracket comp B, the bracket comp B is mounted on the shaft 7, the plate 25, and the spring. The bracket 14, the lock spring 30, and the contact member 45 are integrated.
The dorsal bracket 6 of the bracket comp B is fixed to the side portion of the dorsal skeleton frame 5.

Therefore, positioning of the contact member 45 having the unlock contact portion 47 and the unlock release portion 50 is facilitated, and the setting accuracy of the use range A and the storage range B of the armrest 4 is improved. Further, since the shaft 7 and the abutting member 45 are directly attached to the dorsal bracket 6, there is no displacement in the manufacturing process, and it can be firmly fixed.
Further, the opposite members of the fixed-side spring mounting bracket 14 and the moving-side shaft 7 and the abutting member 45 can be assembled in advance as a bracket comp B to facilitate storage and management.
Thus, a collar 61 is provided at the base of the armrest frame 60 of the armrest 4, an engagement hole 62 is formed around the collar 61, and surface treatment such as covering with a cushion material or a skin member is provided on the outer surface side of the armrest frame 60. Since the arm rest assembly C is configured by attaching the performed pad member 63, when the arm rest assembly C is attached to the bracket comp B fixed to the side portion of the dorsal skeleton frame 5, the dorsal seat 3 is completed.
Therefore, since the backrest seat 3 and the armrest assembly C may be combined, the assembly is facilitated while the armrest 4 is provided with the lock device L.

In this case, the armrest assembly C engages with the engagement holes 62 of the engagement protrusions 20 of the shaft 7 protruding outward from the window holes 64 of the back bracket bracket 6, and from the outside of the opening 65 of the pad member 63. When the fastening member 66 such as a bolt is inserted into the collar 61 and the screw portion 67 of the fastening member 66 is screwed into the nut 68 fixed to the inside of the contact member 45, the attachment is completed and the opening of the pad member 63 is completed. 65 is concealed by the concealing member 69.
Therefore, the armrest assembly C can be directly attached by the fastening member 66 without using a means such as welding, which facilitates the attachment work.

The side view of a sheet | seat. The disassembled perspective view of a locking device. The perspective view which attached the subcomp, the bracket comp, and the armrest assembly to the dorsal skeleton frame. Exploded view of sub-comp (shaft, bracket and plate). The exploded perspective view. The front view. Sectional drawing of a subcomp, a bracket comp, and an armrest assembly. The bottom view of a sub comp and a bracket comp. The positional relationship explanatory drawing of a cam groove and a contact member. The bottom view of a lockable state. The same side view. The bottom view of the unlock holding transition start state. The same side view. The bottom view of the unlock holding transition state. The same side view. Unlock holding state diagram bottom view. The same side view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Seat, 2 ... Seat seat, 3 ... Dorsal seat, 4 ... Armrest, 5 ... Dorsal skeleton frame, 6 ... Dorsal bracket, 7 ... Shaft, 10 ... Step part, 11 ... Large diameter part, 12 ... Small diameter , Armrest frame 60... Armrest frame, spring mounting bracket 14... Spring mounting bracket 15. Side plate 16. 25 ... Plate, 26 ... Insertion hole, 27 ... Groove bottom surface, 28 ... Projection protrusion, 30 ... Lock spring, 31 ... Coil part, 32 ... Stay, 33 ... Fixed end, 35 ... Free end, 36 ... For unlocking 37, guide cam surface, 38 ... switching cam groove, 39 ... bent plate portion, 40 ... rear edge, 41 ... gap, 45 ... contact member, 46 ... plate member, 47 ... unlocking contact portion, 48 ... Unlock Holding surface 50 ... Unlock release portion 52 ... Inclination release surface 56 ... Engagement hole 57 ... Engagement projection 58 ... Engagement hole 60 ... Armrest frame 61 ... Collar 62 ... Engagement hole 63 DESCRIPTION OF SYMBOLS ... Pad member, 64 ... Window hole, 65 ... Opening part, 66 ... Fastening member, 67 ... Screw part, 68 ... Nut, 69 ... Concealment member.

Claims (4)

An outer engagement protrusion 20 is formed on the outer end of the shaft 7, and an inner engagement protrusion 57 is formed on the inner end of the shaft 7, and the burring of the spring mounting bracket 14 is formed on the step 10 at the intermediate portion in the longitudinal direction of the shaft 7. The plate 16 is brought into close contact with the spring mounting bracket 14 by inserting the insertion protrusion 26 of the plate 25 into the engaging protrusion 20 so that the portion 16 can be rotated only freely. The shaft 7 and the plate 25 are fixed in a state where the mounting bracket 14 is sandwiched, and a lock spring 30 that locks the rotation of the armrest 4 on the outer periphery of the shaft 7 inside the spring mounting bracket 14 with frictional resistance. And the fixed end 33 at one end of the lock spring 30 is fixed to the spring mounting bracket 14, The other end of the spring 30 is connected to the switching cam groove 38 of the spring mounting bracket 14 to form a free end 35 for switching the coil portion 31 between a locked state and an unlocked state. The unlocking contact portion 47 for fitting the free end 35 in the switching cam groove 38 and the free end 35 fitted in the switching cam groove 38 are separated from the engaging projection 57 of the switching cam groove 38 to return to the free state. The engaging holes 56 of the contact members 45 provided with the unlocking portions 50 to be engaged are engaged to fix the engaging protrusions 57 by caulking, and then the spring mounting bracket 14 is fixed to the back bracket 6. Next, the engagement hole 62 of the armrest frame 60 is engaged with the engagement protrusion 20 on the outer end of the shaft 7, and in this state, the fixing member 66 is used from the outside of the armrest frame 60. Configured armrest method of mounting of the vehicle seat to secure the 凭 bracket 6. In Claim 1, the said shaft 7, the said plate 25, the said spring mounting bracket 14, the said lock spring 30, and the said contact member 45 are assembled | attached, the subcomp A is comprised, and the spring mounting bracket 14 of this subcomp A is attached. A bracket comp B is configured by being fixed to the inner surface of the dorsal bracket 6, and the bracket comp B is fixed to the outer surface of the dorsal skeleton frame 5 of the dorsal seat 3. The armrest assembly C is constructed by performing the surface treatment of the vehicle seat, and the armrest assembly C is fixed to the bracket comp B by the fastening member 66 from the outside of the opening 65 of the armrest assembly C. . A lock spring 30 having a fixed-side end portion 33 at one end and a free end 35 at the other end that locks the rotation of the armrest 4 with a frictional resistance, and a shaft 7 that fits the coil portion 31 of the lock spring 30 to the outer periphery. A spring mounting bracket 14 for rotatably mounting the outer end side of the shaft 7 and a free end 35 formed on the spring mounting bracket 14 are connected and detached to lock and unlock the coil portion 31. The switching cam groove 38 for switching to the state, the unlocking contact portion 47 for fitting the free end 35 to the switching cam groove 38, and the free end 35 fitted to the switching cam groove 38 are released to be free. Each of which includes an abutment member 45 provided with each of the unlocking portions 50 for returning to the state. The engaging projection 20 is engaged with the outer end of the shaft 7 and the inner end of the shaft 7 Each of the raised portions 57 is formed, and a step portion 10 is formed in the middle portion in the longitudinal direction of the shaft 7, where the burring portion 16 of the spring mounting bracket 14 abuts, and the abutting member is formed on the engaging protrusion 57 of the shaft 7. 45, the engagement hole 56 formed in 45 is engaged and fixed, the insertion protrusion 26 of the shaft 7 is inserted and fixed in the insertion hole 26 of the plate 25, and the plate 25 is brought into close contact with the spring mounting bracket 14. in a state, the spring mounting bracket 14 more rotatably clamped to the plate 2 5 and the step portion 10 of the shaft 7, fixing of the seat back to the outer surface of the spring mounting bracket 14 back凭骨case frames 5 An armrest assembly C that is fixed to the inner surface of the bracket 6 and is subjected to surface treatment such as covering the outer skin member of the armrest frame 60 is attached to the outer end of the shaft 7. Muresuto mounting arrangement. 4. The armrest assembly C according to claim 3, wherein the armrest frame C includes an engagement hole 62 that engages with the engagement protrusion 20 at the inner end of the shaft 7, and the engagement hole 62 is engaged with the engagement protrusion 20. The vehicle seat armrest mounting structure configured to be fixed to the back bracket 6 from the outside of the opening 65 of the armrest assembly C by the fastening member 66 in the combined state.

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