JPH0631555U - Adjustable angle armrest ratchet mounting structure - Google Patents

Abstract

(57) [Abstract] [Name] Ratchet mounting structure for variable-angle armrests [Purpose] When transporting an assembly in which a ratchet and bolts that rotate the frame are assembled to an armrest frame, position of the bolts and ratchet Prevent misalignment. [Structure] The ratchet 3 assembled to the frame 2 of the armrest 1 is fixed to the seat back side by a stepped bolt 13 and a pin 15 which are rotation axes of the frame 2, and the frame 2 can be rotated with respect to the ratchet 3. However, the set plate 16 is attached to the frame 2 so as to cover the ratchet 3 and the bolt 13,
As a result, displacement of the ratchet 3 in the thickness direction is prevented. Further, the head portion 13a of the stepped bolt 13 projects from the bolt hole 22 of the set plate 16, but the flange portion 13b is sandwiched between the set plate 16 and the ratchet 3, whereby the axial direction of the stepped bolt 13 is increased. The movement of is also substantially blocked.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle seat, and more particularly to a ratchet mounting structure for an armrest with a variable angle that is rotatably mounted on a side surface of a seat back of the vehicle seat.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 6, a vehicle seat having a seat cushion 100 and an angle-adjustable seat back 101 is known in which an armrest 102 is rotatably attached to both side surfaces of the seat back 101. ing. Here, as shown in FIG. 7 (A), the angle can be adjusted so that the armrest 102 becomes substantially horizontal according to the inclination angle of the seat back 101, and as shown in FIG. 7 (B), the armrest 102 can be adjusted. 102 can also be flipped up and stored.

A ratchet mechanism is provided for adjusting the posture of the armrest, and as shown in FIG. 8, the ratchet pole 106 provided on the frame 105 of the armrest 102 is fixed to the seat back 101 side. By engaging with the ratchet 108, the posture of the armrest 102 is maintained, while by operating the lock release handle 104 shown in FIG. 6, the armrest 102 can freely rotate with respect to the seat back 101. .

Conventionally, such an armrest 102 is manufactured as an assembly as shown in FIG. That is, a stepped bolt 110 is provided penetrating the ratchet 108 and the frame 105, and the stepped bolt 110 becomes the center of rotation of the armrest 102 by being tightened to the seat back 101 side. Further, the ratchet 108 is fixed to the seat back 101 by a rotation stop pin (not shown) in a state where the armrest 102 is allowed to rotate. The stepped bolt 110 is provided with a flange portion 110b in the vicinity of the head portion 110a thereof, and the flange portion 110b serves to press the ratchet 108, and the bolt leg portion protruding from the frame 105 toward the seat back 101 side. The wave washer 113 is fitted to 110c.

Then, in order to convey such an armrest assembly or the like, a paper washer 114 is fitted to the leg portion 110c of the stepped bolt 110 so as to hit the stepped portion, and the paper washer 114 causes the stepped portion to be stepped. The bolt 110 is prevented from coming off.

[0006]

[Problems to be solved by the device]

 However, if the paper washer 114 loosens or slips out, there is a concern that the stepped bolt 110 may shift upward in the figure, or may fall out of the service hole 115 of the frame 105. Further, for example, as shown in FIG. 9, when the stepped bolt 110 is lifted up and the stepped portion rides on the frame 105, the stepped bolt 110 is tightened (assembled to the seat back 101 side). If this happens, the bolt 110 may be misaligned, or the ratchet 108 may be misaligned with respect to the ratchet pole 106 in the tooth width direction, resulting in partial contact.

An object of the present invention is to provide a ratchet mounting structure that prevents the bolt from coming off and the ratchet from shifting in position when the armrest is assembled as described above.

[0008]

[Means for Solving the Problems]

 The present invention has a structure in which the frame-mounted armrest rotatably mounted on the side surface of the seat back as described above is provided with the flanged bolt, which is the center of rotation, through the ratchet and the frame. It is characterized by adding a set plate. The set plate is fixed to the frame so that the ratchet is sandwiched between itself and the frame. Further, this set plate has a bolt hole, and the bolt hole allows the head portion of the bolt to pass but does not allow the flange portion thereof to pass.

[0009]

[Action]

 Since such a set plate presses the flange of the bolt and sandwiches the ratchet between the frame and the frame, movement of these bolt and ratchet in the axial direction of the bolt is restricted, preventing the bolt from falling off and the ratchet from shifting. To be done.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows the frame 2 of the armrest 1. As shown in FIG. 3, the frame 2 has a box-shaped cross-sectional shape in which a side member 2b is integrated on the open side surface of a C-shaped member 2a. Further, a ratchet 3, a ratchet pole (hereinafter, simply referred to as a pole) 4, an unlocking ring 5 and an unlocking handle 6 are provided. The ratchet 3 has a circular shape and is arranged concentrically with the center of rotation of the frame 2, and the pole 4 meshes with the engaging teeth 7 of the ratchet 3. The pole 4 is rotatably attached to the frame 2 by a stepped pin 8, and the pole 4 and the lock release handle 6 are connected by a lock release link 5 via the stepped pins 9 and 10. There is. The lock release link 5 is biased by the spring 11 in the direction in which the pole 4 is engaged with the ratchet 3, and the lock release handle 6 is rotated around the stepped pin 12 against the biasing force of the spring 11. By doing so, the engagement between the pole 4 and the ratchet 3 is released.

A stepped bolt 13 is provided as a rotating shaft of such a frame 2, and the stepped bolt 13 is also used as a bolt for mounting the ratchet 3. The pin 15 is fixed to the ratchet 3, while the C-shaped member 2 a forming the frame 2 is formed with an arc hole 14 centered on the stepped bolt 13, and the pin 15 of the ratchet 3 is formed therein. Penetrates. The ratchet 3 is fixed to the seat back 101 side by these stepped bolts 13 and pins 15. The armrest frame 2 is allowed to rotate about the stepped bolt 13 within the range of the circular arc hole 14 of the ratchet 3 whose position is fixed.

A set plate 16 shown in FIGS. 1 and 2 is provided in the frame 2. The set plate 16 is a plate member that is long along the longitudinal direction of the frame 2 and has a central portion that bulges wide. One end of the set plate 16 is inserted into the insertion hole 18 of the frame 2 and the other end is A pin hole 19 is formed, and the stepped pin 8 serving as the pivot shaft of the pole 4 is passed through the pin hole 19 so that the pin 2 is fixed to the frame 2. As shown in FIG. 1, the insertion hole 18 is formed in the vertical wall portion 20 in which the end of the C-shaped member 2a of the frame 2 is bent and bent at a right angle, and the stepped pin 8 is formed as shown in FIG. It is prevented from coming off by being caulked from the outside as shown in.

At the center of the set plate 16, there is formed a circular bulging portion 21 which is stamped out in the plate thickness direction, and a bolt for inserting the head portion 13 a of the stepped bolt 13 into this center portion. A hole 22 is formed. The stepped bolt 13 has a circular flange portion 13b integrally with a base end portion of the head portion 13a, and a male screw is formed on a tip end side of a leg portion 13c connected to the flange portion 13b. The stepped bolt 13 is inserted into a bolt hole 23 formed in the ratchet 3 and a bolt hole 24 formed in the C-shaped member 2a of the frame 2, and the flange portion 13b thereof contacts the side surface of the ratchet 3. While contacting, the leg portions 13c thereof protrude laterally from the C-shaped member 2a of the frame 2. Here, as shown in FIG. 5, the diameter D1 of the bolt hole 22 of the set plate 16 is larger than the diameter D2 of the head portion 13a of the stepped bolt 13 and smaller than the diameter D3 of the flange portion 13b. The protrusion amount t1 of the bulging portion 21 around the bolt hole 22 is slightly larger than the thickness t2 of the flange portion 13b. Therefore, the head portion 13a of the stepped bolt 13 projects from the bolt hole 22 of the set plate 16, and the flange portion 13b of the stepped bolt 13 is set in the bulging portion 21 of the set plate 16.

The assembling of the armrest assembly as described above is performed as follows. First, the ratchet 3, the pole 4, the stepped bolt 13 and the like are attached to the C-shaped member 2a of the frame 2 in FIG. The set plate 16 is fixed to the frame 2 by inserting one end of the set plate 16 into the insertion hole 18 of the C-shaped member 2a and pressing the stepped pin 8 into the other end so as to press them. . After the lock release link 5 and the lock release handle 6 shown in FIG. 2 are attached, the side member 2b is integrated with the C-shaped member 2a by spot welding or the like to form an armrest assembly.

In such an assembled state, since the ratchet 3 is constrained by being sandwiched between the set plate 16 and the frame C-shaped member 2a, the ratchet 3 is separated from the frame C-shaped member 2a. It never rises. Further, since the flange portion 13b of the step bolt 13 is sandwiched between the bulging portion 21 of the set plate 16 and the ratchet 3, the axial movement of the step bolt 13 is substantially prevented. To be done. When mounting on the seat back side, the step bolt 13 is tightened from the service hole 26 of the frame side member 2b in FIG. 4, and then the pad 27 and the cover 28 are put on the frame 2.

In the above embodiment, one end of the set plate 16 was attached to the frame 2 by the stepped pin 8 to which the pole 4 is attached, but it is attached to the frame 2 by another fixing means. It can also be fixed. In addition, it goes without saying that the present invention can be implemented in various modified modes based on the knowledge of those skilled in the art.

[0017]

[Effect of device]

 According to the present invention, the ratchet and the bolt assembled to the frame of the armrest are kept in a state where the movement of the ratchet and the bolt in the axial direction of the bolt is restricted by the set plate. It is possible to prevent the fallout of the tilt and the ratchet rising from the frame. Therefore, in the assembled state where the bolt is tightened to the seat back side, the ratchet and ratchet pole may shift in the tooth width direction and may be in a one-sided contact state, or the axis of the bolt may shift from the normal state. Is avoided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a ratchet mounting structure for an armrest according to an embodiment of the present invention.

FIG. 2 is an overall side view of the frame of the armrest.

3 is a sectional view taken along line AA in FIG.

4 is a sectional view taken along line BB in FIG.

FIG. 5 is an explanatory diagram showing a main part of FIG.

FIG. 6 is a perspective view of a vehicle seat including the armrest.

FIG. 7 is a side view showing the function of the armrest.

FIG. 8 is a cross-sectional view showing an example of a conventional ratchet mounting structure.

FIG. 9 is an explanatory diagram showing the drawback.

[Explanation of symbols]

 1 armrest 2 frame 3 ratchet 4 ratchet pole 13 stepped bolt 16 set plate 21 bulge 22 bolt holes

Claims (1)

[Scope of utility model registration request] 1. A frame of an angle-adjustable armrest rotatably attached to a seat back side surface of a vehicle seat is provided with a ratchet fixed to the seat back side through the frame, and the ratchet is attached to the frame. Attached ratchet poles mesh with each other, and bolts that penetrate the ratchet and the frame and serve as the center of rotation of the frame are provided. The bolt has a flange portion in the vicinity of its head, and the flange portion is While the ratchet is pressed to the frame side, the leg portion of the bolt projects outward from the frame and is tightened to the seat back side.In the ratchet mounting structure, a set plate is fixed to the frame, and the set plate is fixed to the frame. Sandwiches the ratchet with the frame Both of them have a bolt hole through which the head portion of the bolt is passed and through which the flange portion is not passed, and a set plate thereof restricts movement of the bolt and ratchet in the axial direction of the bolt. Mounting structure.