JPH0111102Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flip-up armrest installed on the side of a seat in a vehicle or the like.

[Conventional technology]

The armrests of seats in vehicles etc. pose an obstacle when sitting down and leaving the seat, and especially when leaving the seat in an emergency such as in the case of an accident. For this reason, armrests of this type that have a function of flipping up the arms of the armrests as necessary have been proposed and adopted.

By the way, the above-mentioned flip-up armrest is disclosed in Japanese Utility Model Publication No. 56-54823.

As shown in FIGS. 4 and 5, the flip-up armrest disclosed in this publication has an upper surface 3 in the center at the upper part of a back body 2 which is erected on the outside of the seat and at the rear of the lower body 1 to which the inside is to be fixed. At the same time, a support plate 4 is erected on the outside of the top surface 3, a notch 5 is provided inside the top surface 3, a support plate bag hole 6 is bored inside the support plate 4, and the lower part is fixed to the notch 5 with a fixture 7. A cover plate blind hole 9 is bored on the outside of the upper part of the cover plate 8 to form the rear part of the movable arm 10 which is positioned approximately horizontally, and an occiput 12 having a through hole 11 is interposed between the support plate 4 and the cover plate 8. Seshime,
A pivot pin 13 passing through the cover plate blind hole 9, the through hole 11, and the support plate blind hole 6 is provided, and the movable arm 10 or the movable arm 10 is provided with a pivot pin 13 on the upper surface of the front convex 14 provided in the front part of the upper surface 3. Adjustment piece 15 is brought into contact with rotary arm 10.
When the arm is rotated upward around the pivot pin 13, the rear convex 16 at the rear of the occiput 12 comes into contact with the rear surface of the front convex 14, and the rotating arm 10 is placed in a horizontal position relative to the lower body 1. It is configured so that it can be rotated from a vertical position to a vertical position.

[Problem that the invention attempts to solve]

The flip-up armrest constructed in this way is constructed by inserting the pivot pin 13 into the blind hole 6 provided in the lower body 1, passing the pin 12 through the through hole 11 in the occiput 12 of the movable arm 10, and then attaching the cover plate to the tip of the pin 13. The cover plate 8 is tightened to the lower body 1 at its lower end with screws by aligning the blind holes 9 of the cover plate 8, but since the tightening position of the cover plate 8 is far from the pivot position of the movable arm 10, the pivot joint part, That is, backlash occurs in the rotating portion by the pivot pin 13, resulting in incomplete pivoting and unavoidable problems such as uneven rotational moderation of the movable arm 10.

The present invention has been made in view of the above-mentioned conventional problems.The cover plate that rotatably clamps the armrest arm against the base can be tightened with a screw at the center of rotation of the armrest arm. The technical challenge is to enable stable and moderate rotation of the motor.

[Means for solving problems]

In order to solve the above-mentioned technical problem, the present invention forms a transverse cut-out stepped surface part 22 on the upper part of the base body 21 fixed to the side of the seat, and approximately in the center of the vertical surface 22a of this stepped surface part 22. A cover plate 24 is provided with a circular convex portion 23 and is attached to the lower step portion 22b of the step surface portion 22 and faces the vertical surface 22a and the upper step portion 22c between them.
A circular convex portion 25 is provided on the inner surface of the circular convex portion 25, which faces the circular convex portion 23 at a required interval in the axial direction.

On the other hand, at the rear of the armrest arm body 26 which is rotatably attached to the base body 21, a support part 27 is formed which is rotatably held between the vertical surface 22a of the stepped surface part 22 and the cover plate 24. At the periphery of the part 27, there is a horizontal holding part 27a which comes into contact with the upper part 22c of the stepped surface part 22 when the armrest arm part 26 is located horizontally with respect to the base 1, and a horizontal holding part 27a which comes into contact with the upper step part 22c of the stepped surface part 22 when the armrest arm 26 is located in the horizontal direction with respect to the base 1;
and an upright holding portion 27b that comes into contact with the rear surface of the cover plate 24.
It has a hollow part in the center that can fit into both the convex parts 23 and 25, and a collar 28 which is equal in thickness or slightly longer than the support part 27 of the armrest arm body 26 is rotatably inserted into the collar 28. 28 are fitted into the corresponding convex portions 23 and 25, and the support portion 27 of the armrest arm 26 is rotatably clamped between the vertical surface 22a of the base body 21 and the cover plate 24. The flip-up armrest 20 is constructed by holding the base body 21 and the cover plate 24 through the hollow part of the collar 28 and tightening and fixing them with screws 29.

[Effect]

The flip-up armrest 20 constructed in this way operates as follows.

In a normal state, the armrest arm body 26 is held in a horizontal state with respect to the base body 21 by the horizontal holding part 27a of the support part 27 coming into contact with the upper step part 22c of the stepped surface part 22, so that the seated person cannot rest his or her arm on the armrest arm 26. I can do it. Further, when sitting or leaving the seat, the armrest arm 26 is pushed up and rotated upwards around the fitting part of the collar 28 to the support part 27, and the upright holding part 27b is held in a substantially vertical position by pushing up the base 1 and the cover plate. 24 and is held upright so that sitting down and leaving the seat can be done without any trouble.

This rotation of the armrest arm 26 is caused by the fact that the vertical surface 22a of the base 1 that clamps the support part 27 and the cover plate 24 are connected to the support part 2.
Since it is tightened at the center of rotation of 7, it can be operated stably and with good control.

〔Example〕

An embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3. FIG.

The flip-up armrest 20 is approximately L to be fixed to the side of the armrest.
It is composed of a letter-shaped base 21 and an armrest arm 26 rotatably supported on the upper end of the base 21 from the horizontal direction to the vertical direction.

The base body 21 has a two-step notched cross section 22 formed on the inner surface side of the upper end, a circular convex portion 23 is provided approximately in the center of the vertical surface 22a of the stepped surface portion 22, and a groove 23a is formed on the periphery of the base. be. A cover plate 24 corresponding to the vertical surface 22a is attached to the lower step portion 22b of the stepped surface portion 22 of the base body 21 with screws 30.
A circular protrusion 25 is provided on the inner surface of the cover plate 24 and faces the protrusion 23 on the vertical surface 22a at a required interval in the axial direction, and a groove 25a is also provided on the periphery of the base. It is formed.

On the other hand, a support part 27 is formed at the rear end of the armrest arm body 26 and is rotatably inserted between the vertical surface 22a of the base body 1 and the cover plate 24. When the arm body 26 is positioned horizontally with respect to the base body 21, a horizontal holding part 27a is formed which comes into contact with the upper part 22c of the cross-sectional part 22, and the armrest arm body 26 is vertically attached to the upper edge. An upright holding portion 27b is provided that comes into contact with the rear surfaces of the base body 21 and the cover plate 24 when positioned in the direction. This standing holding part 27
b can be formed by extending the upper surface plate 26a of the armrest arm body 26 so as to come into sliding contact with the upper circumferential surfaces of the base body 21 and the cover body 24, as shown in the figure.

Support part 2 of armrest arm body 26 formed in this way
A shaft hole 27c is bored in the center of the shaft hole 27.
At c, both end portions are fitted into the above-mentioned both convex portions 23 and 25, and a collar 28 whose diameter is slightly longer than the thickness of the support portion 27 and whose diameter is fitted into the grooves 23a and 25a is rotatably inserted. Spacers 31 are fitted into the protruding parts at both ends of this collar 28, and both end parts are connected to the corresponding convex parts 23 and 25 of the base body 21 and cover plate 24.
At the same time, it is fitted into the peripheral grooves 23a and 25a, and the support part 27 of the armrest arm body 26 is held by the vertical surface 22a of the base body 21 and the cover plate 24 so as to be rotatable with the spacer 31 interposed therebetween. and base 2
1 and the cover plate 24 are passed through the hollow part of the collar 28 and tightened with screws 29. Further, the cover plate 24 is fastened and fixed to the lower step part 22b of the base body 21 at the lower edge portion with screws 30, and the armrest arm body 26 is pivoted around a collar 28 which is held in a fixed state between the base body 21 and the cover plate 24. is flipped up and rotated from the horizontal direction to the vertical direction with respect to the base body 21.

The heads of the screws 29 and 30 for tightening and fixing the cover plate 24 to the base body 21 are inserted into the screw holes 32 formed in the screw insertion holes of the cover plate 24.

[Effect of idea]

As described above, according to the present invention, the cover plate that rotatably holds the armrest arm against the base fixed to the side of the seat is tightened and fixed at the center of rotation of the armrest arm. The plate evenly corresponds to the rotational support part of the armrest arm over the entire surface, and the collar, which is the axis of rotation, is securely held without swinging or eccentricity, so that the armrest arm has a stable sense of rotation and is always stable. It can be flipped up and rotated smoothly and reliably, making it possible to leave the seat in an emergency without any trouble.

In addition, by using a collar as the rotating shaft, even if the diameter of the shaft is increased, the required strength can be obtained without wasting material or increasing weight due to the hollow shape, and the load applied to the armrest body. This is caused by a load being applied to the front end of the armrest arm because it is supported by the collar as the rotation axis, the convex part on the board side to which both ends of this collar are fitted, and the convex part on the cover plate side. It can sufficiently withstand even large shearing forces and can reliably support the armrest. In addition, by increasing the shaft diameter of the collar, even if an unnecessary horizontal rotational load is applied to the armrest arm during use, this rotational load can be dispersed, and the screws that tighten and fix the base plate and cover plate are Since the screws are tightened through the hollow portion, no shearing force is applied to the screws themselves, and the cover plate is prevented from separating from the substrate, ensuring sufficient durability for long-term use.

Also, in manufacturing, the protrusions on the substrate side and the protrusions on the cover plate side are provided apart from each other, so there is no need to strictly control the dimensional accuracy of the length of both protrusions, which simplifies the manufacturing process. Become. The present invention is especially effective when applied to the armrests of bus seats.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main parts of an embodiment of the flip-up armrest according to the present invention, Figure 2 is an exploded perspective view of the main parts, Figure 3 is a perspective view of the flip-up armrest, and Figure 4 is the conventional one. FIG. 5 is a side view of the flip-up armrest, and FIG. 5 is a sectional view taken along line A--A in FIG. In the figure, 21 is a base, 22 is a step surface, 22a is a vertical surface, 22b is a lower step, 22c is an upper step, 23,
25 is a convex portion, 24 is a cover plate, 26 is an armrest arm body, 27
28 is a collar, and 29 is a screw.

Claims (1)

[Scope of utility model registration request] In a flip-up armrest in which an armrest arm is rotatably pivoted from a horizontal direction to a vertical direction on a base body fixed to the side of a seat, a cutout stepped surface portion is formed in the upper part of the base body in the lateral direction, A convex portion is provided approximately in the center of the vertical surface of the surface portion, and the cover plate is attached to the lower step of the stepped surface portion and faces the vertical surface at a predetermined distance. a convex portion is provided at the rear of the armrest arm body, and a support portion rotatably held between the vertical surface of the step surface and the cover plate is formed at the rear of the armrest arm body; a horizontal holding part that comes into contact with the upper part of the step surface when the body is positioned horizontally with respect to the base; and a horizontal holding part that comes into contact with the upper part of the step surface when the body is positioned in the horizontal direction with respect to the base; In addition to providing an upright holding part to be abutted, the support part has a hollow part in the center thereof that can fit into both of the convex parts, and a collar having a thickness equal to or slightly longer than the support part is rotatably inserted. , both ends of the collar are fitted into the corresponding convex portions, and the supporting portion of the armrest arm is rotatably held in the vertical plane of the base by the cover plate, and the base and A flip-up armrest for a seat, which is formed by tightening and fixing the cover and the cover through the hollow part of the collar with screws.