KR20010047370A - a device for pivoting an arm rest - Google Patents

Abstract

PURPOSE: An armrest rotating device is provided to safely rotate an armrest through a simple structure and less parts without additional devices, so product costs is reduced and working reliance is improved. CONSTITUTION: A rotary can(20), which is fixed on an armrest body(10), has several slits(21) on the circumference part and a hitching projection(23) in one side. A fixing shaft(30), whose one end is fixed on a seat frame, penetrates the rotating can and has a stopper(32), which is projected to be contacted to the hitching projection. A guide ring(40), which is fixed on the one end of the fixing shaft, has a recess portion(42) and a releasing projection(44), which is projected more than the contacting face(41). The recess portion, whose one part forms an incline plane(43), is separated from the rotary can. A coil spring(50), whose one end is fixed on the rotating can and the other end is selectively connected with the slit or the recess portion, is joined between the rotating can and the fixing shaft.

Description

Armrest rotator {a device for pivoting an arm rest}

The present invention relates to a rotating device of an arm rest used for a seat of a vehicle, and more particularly, to an armrest rotating device that is rotatably mounted and supported on a seat so that the armrest can be selectively folded as needed. It is about.

In general, a seat such as a vehicle is provided with an armrest for a more comfortable ride of the occupant, especially during long-distance operation, such an armrest causes a problem to the behavior of the occupant rather than to use. Accordingly, when the armrest is not in use, the armrest is preferably stored in the back of the seat and rotatably mounted to the seat so that it can be selectively taken out and used only when used.

An example of a conventional armrest rotating device is shown in FIG. 1. The rotating cylinder 2 is fixed to the armrest main body 1, and the small diameter part 3a of the fixed shaft 3 comprised in step | paragraphs passes through the rotating cylinder 2, and is fixed to a seat frame F. It is. A coil spring 4 having an inner diameter smaller than these is coupled to an inner surface of the rotating cylinder 2 and an outer circumference of the large diameter portion 3b of the fixed shaft 3 so that one end thereof is fixed to the armrest body 1, and the fixed shaft At the other end of (3), an end plate 5 having a cam portion 5a and a locking projection 5b on the outer circumference at regular angle intervals is integrally fixed by bolts 6. In addition, a bracket 7 is provided on one side of the armrest main body 1, and a lever 8 having a contact pin 8a at the tip end thereof is rotatably mounted by the hinge shaft 8b. This lever 8 is elastically biased in the required direction by the return spring 9.

If the armrest is not used, the armrest body 1 is rotated clockwise to erect and fold in the vertical direction. At this time, the lever 8 has a contact pin 8a of the cam portion 5a of the end plate 5. By contacting the outer circumference, the free end of the coil spring 4 is pushed toward the release direction. Thereby, the restraint force of the coil spring 4 does not act on the rotating cylinder 2, and the armrest main body 1 becomes a rotatable state (refer FIG. 2A). When the armrest is rotated in the horizontal direction as shown in FIG. 2B to use the armrest in this state, the contact pin 8a is released from the cam portion 5a of the end plate 5 and caught by the locking protrusion 5b. Direction, the lever 8 is returned to its initial position by the restoring elasticity of the return spring 9 as shown in FIG. Then, the free end of the coil spring 4 returns to its winding direction by self-elasticity and tightens the large diameter portion 3b of the rotating cylinder 2 and the fixed shaft 3 to the armrest main body 1. Will be fixed. When the armrest body 1 is rotated upward to fold the armrest in this state, the contact pin 8a contacts the cam portion 5a of the end plate 5 as shown in FIG. Direction of rotation, the lever 8 pushes the free end of the coil spring 4 toward the release direction as shown in FIG. 2A. Accordingly, the restraint force of the coil spring 4 does not act on the rotating cylinder 2, so that the armrest body 1 is rotatable and easily folded.

However, the conventional armrest rotating device locks or releases the armrest body 1 by restraining or releasing the coil spring 4 in the release direction by a lever 8 of a separate configuration. That is, a large number of parts not only increases the number of assembly work, but also had a problem that the structure is quite complex. In particular, since the armrest main body 1 is not provided with any other means for fixing the position in the unused state, the armrest main body 1 is rotated almost one clockwise as shown by a virtual line in FIG. 2D. It was possible to turn close to it, and there was a concern that it would interfere with the occupant's safety or comfortable riding. In addition, while the winding portions of the coil springs 4 are set to be in contact with each other, the rotation of the armrest body 1 is restrained or released only by adjusting the tightening force by the winding direction. Since the rest is a free state in which the restraint force of the coil spring 4 does not work, there is no fear that the arm rest may be unnecessarily rotated due to vibration or shaking of the vehicle in operation.

On the other hand, Japanese laboratory No. 63-28926 has a stopper wall on which the free end of the coil spring is caught and a cam face at an angle on the main surface of the end plate, and the groove portion at which the free end of the coil spring is fitted at one end thereof. And an oscillator having a tip guide portion for disengaging the free end of the coil spring from its groove by contacting the cam surface of the end plate, instead of the lever, so that the armrest can be rotated only between its containment position and the lock position. However, the armrest rotating device of such a configuration is also to control the rotation of the armrest by a rocker of a separate configuration, the problem of a complicated configuration with a large number of parts is still not solved.

The present invention has been completed in view of the above-described problems of the conventional armrest rotating device, while having a simple structure consisting of a small number of parts, it is possible to ensure stable rotation of the armrest, as well as its use position and release position. The object is to provide an armrest rotating device that can only be operated between.

Another object of the present invention is to provide an armrest rotating device that can effectively prevent the phenomenon in which the armrest in the release position is inadvertently rotated due to the vibration or shaking of the running vehicle.

1 is an exploded perspective view showing an example of a conventional armrest rotating apparatus,

2a to 2d is a front view of the combined state showing the operating state of Figure 1,

Figure 3 is an exploded perspective view showing the armrest rotating apparatus according to the present invention,

4 is a front view of the combined state of Figure 3,

5 is a cross-sectional view taken along the line VV of FIG. 4;

Figure 6 is an excerpt side view of Figure 4,

7 is a plan view taken along the line of FIG. 6;

8 to 11 are excerpted side views sequentially showing the operation of the armrest rotating apparatus according to the present invention.

<Explanation of symbols for main parts of drawing>

10: armrest body 20: rotary cylinder

21: Slit (of rotary tube) 23: Slump (of rotary tube)

30: fixed shaft 32: stopper

33: engagement hole (fixed shaft) 34: support rod

40: guide ring 41: contact surface (of the guide ring)

42: stepped portion of the guide ring 43: inclined surface of the guide ring

44: release guide (of guide ring) 50: coil spring

52: fixed end (of coil spring) 53: free end (of coil spring)

In order to achieve the above objects, the armrest rotating device according to the present invention includes a rotating cylinder fixed to the armrest body and having a slit formed around one end thereof and a locking protrusion formed radially at regular intervals therefrom; A fixed shaft having one end penetrated through the rotary cylinder and fixed to the seat frame, and having a stopper protruding in a radial direction so that the engaging protrusion can contact the other end; The outer periphery of the fixed shaft is fixedly coupled at intervals with the seat frame, and a stepped portion spaced apart from the rotating cylinder is formed on a part of the contact surface which contacts the other end of the rotating cylinder, and an inclined surface is formed on one side of the stepped portion, and the other side is released. A guide ring having a stepped portion; And a coil spring coupled between the rotary cylinder and the fixed shaft, one end of which is fixed to one end of the rotary cylinder, and the other end of which is selectively positioned on the step portion of the slit or the guide ring of the rotary cylinder.

According to one preferred feature of the present invention, a gap is formed between each winding portion of the coil spring so that the free height of the coil spring is longer than the length of the rotating cylinder.

The present invention having the configuration as described above, the armrest can be stably rotated without a separate coil spring control means as in the prior art as well as the armrest can be accurately operated only between the use and release position of the armrest parts In addition to the reduction in number and the increase in manufacturability, it will be a great effect in improving the reliability of the armrest rotating device.

Such specific features and other advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

3 to 5, the armrest rotating device according to an embodiment of the present invention is a rotary cylinder 20 is fixed to one end of the armrest body 10, and through the rotary cylinder 20 Between the fixed shaft 30 fixed to the seat frame F, the inner circumferential surface of the guide ring 40 and the rotating cylinder 20 fixed to the outer circumference of one end of the fixed shaft 30 and the outer circumferential surface of the fixed shaft 30 It is composed of a coil spring (50) for fixing the position of the fixed shaft (30) as needed.

The rotating cylinder 20 has a substantially C-shaped cross section in which a slit 21 is formed in a portion of the circumference thereof, and the slit 21 is fixed by inserting a free end 53 of the coil spring 50. Since it can be as long as possible, it may be configured as a groove of the appropriate length. On the outer end of the rotating cylinder 20, one fixing hole 22 into which one end of the coil spring 50 is fitted is formed to form an appropriate angle with the slit 21. The fixing hole 22 may be configured alone to penetrate the main surface of the rotating cylinder 20, as shown in the stopper of the fixed shaft 30 to form a groove on the outer end of the rotating cylinder 20 to be described later It can also be configured by having the engaging projection 23 which catches the 32 and restricts the rotation range of the armrest main body 10 blocks the opening of the groove. In addition, a groove is formed at the outer end of the rotating cylinder 20, and a locking protrusion 23 is formed at one side of the groove so that the fixed end 52 of the coil spring 50 is at the stepped portion of the groove and the locking protrusion 23. It can also be configured to be fixed by the position. The locking protrusion 23 may be configured integrally with the rotating cylinder 20, or may be separately configured and fixed by welding as shown.

The fixed shaft 30 has a flange 31 at the outer end thereof in contact with the outer end of the rotary cylinder 20, and contacts the engaging protrusion 23 of the rotary cylinder 20 to a part of the main surface of the flange 31 to arms. A stopper 32 is formed to protrude from the rotation of the rest body 10. The fixed shaft 30 may be fixed directly to the seat frame (F), the inner end of the separate configuration as shown for maintaining the gap with the seat frame (F) for smooth rotation of the rotating cylinder (20) It is preferable to be fixed to the seat frame F by the support rod 34. That is, the hexagonal support rod 34 having the screw holes 35 is fixed to the seat frame F by welding, and the hexagonal coupling holes 33 are arranged in the center of the fixed shaft 30 in the axial direction from the inner end thereof. After forming a suitable depth so as to engage the support rod 34 so that the inner end of the fixed shaft 30 is spaced apart from the seat frame (F), the bolt 36 in the screw hole 35 of the support rod 34 from the outer end side thereof. ) Is to fix the fixed shaft 30 to the seat frame (F).

The guide ring 40 is coupled to the outer circumference of the protruding inner end of the fixed shaft 30 in a state where the fixed shaft 30 is penetrated through the rotary cylinder 20, and then integrally connected to the fixed shaft 30 by welding. It is fixed. Accordingly, the outer end of the guide ring 40 is in contact with the inner end of the rotating cylinder 20, the step portion 42 is formed in a portion of the contact surface 41 to be spaced apart from the inner end of the rotating cylinder 20. One side of the step portion 42 is formed with an inclined surface 43 for inserting the free end 53 of the coil spring 50, which will be described later, into the slit 21 of the rotary cylinder 20, the step of the step 42 The other side is provided with a release protrusion 44 that serves to separate the free end 53 of the coil spring 50 inserted into the slit 21 of the rotary cylinder 20 to the outside. To this end, the release protrusion 44 protrudes outward from the contact surface 41, and one contact surface 45, which is in contact with the free end 53 of the coil spring 50, is inclined downward. The release protrusion 44 may be replaced by forming a step on the other side of the step 42.

The coil spring 50 has a fixed end 52, both ends of which are bent to the outside and fitted into the fixing hole 22 of the rotating cylinder 20, and the slit 21 or the guide ring 40 of the rotating cylinder 20. It has a free end 53, which is selectively positioned in the step 42 of (). A minute gap 54 is formed between the winding portions 51 of the coil spring 50 so that the free height thereof is longer than the length of the rotating cylinder 20. The coil spring 50 should be able to tighten the outer periphery of the fixed shaft 30 so that the armrest body 10, that is, the rotating cylinder 20 to which it is fixed in the free state, does not rotate about the fixed shaft 30. Therefore, the inner diameter thereof is configured to be smaller than the outer diameter of the fixed shaft 30.

Next, the operation of the armrest rotating apparatus according to the present invention configured as described above will be described with reference to FIGS.

FIG. 6 is a side view of a state in which the armrest body 10 is rotated upward and stored in a backrest (not shown) or the like when the armrest is not used (corresponding to position A in FIG. 4). In this state, as shown in FIG. 7, the free end 53 of the coil spring 50 is inserted into the slit 21 of the rotary cylinder 20 to come into contact with the contact surface 41 of the guide ring 40. As a result, the free end 53 of the coil spring 50 is restrained in a state of being elastically deformed toward the release direction by the slit 21 of the rotary cylinder 20, so that the rotary cylinder 20 is connected to the fixed shaft 30. It is placed in a rotatable state with respect to. On the other hand, since the coil spring 50 is in a state in which the winding parts 51 are compressed and closely adhered to each other, the coil spring 50 is a flange of the contact surface 41 and the fixed shaft 30 of the guide ring 40. It will push the 31 elastically. Therefore, while the rotary cylinder 20 is in a rotatable state with respect to the fixed shaft 30, the armrest that has been stored due to vibration or shaking while driving cannot be accidentally rotated.

When using the armrest in this state, the armrest body 10 is rotated to position C of FIG. Then, as shown in FIG. 8, the slit 21 of the rotating cylinder 20 rotates toward the release protrusion 44 of the guide ring 40, wherein the free end 53 of the coil spring 50 is rotated. Since the elastic deformation in the unwinding direction acts on the winding direction by the slit 21 of the tradition 20, the free end 53 is rotated together with the rotary cylinder 20 without being separated from the rotary cylinder 20. The release protrusion 44 of the guide ring 40 comes into contact.

Subsequently, as shown in FIG. 9, when the armrest body 10 is further rotated, the free end 53 of the coil spring 50 is rotated by the inclined contact surface 45 of the release protrusion 44. The compressed state of the coil spring 50 is released while being separated from the slit 21. Then, the coil spring 50 becomes a free state in which no restraining force is applied, and the free end 53 is rotated in the winding direction by its restorative elasticity, thereby tightening the outer circumference of the fixed shaft 30. Therefore, the rotary cylinder 20 is integrally fixed by the fixed shaft 30 and the coil spring 50, and the armrest is set to the required position.

In this state, the armrest main body 10 can be rotated in the B position direction of FIG. 4, but is not rotated in the C position direction. That is, in the C position, since the coil spring 50 is free, when rotating in the B position, the frictional force generated between the coil spring 50 and the fixed shaft 30 acts in the unwinding direction of the coil spring 50 so that the rotary cylinder 20 is rotatable with respect to the fixed shaft 30, but when rotating in the C position direction, the friction force generated between the coil spring 50 and the fixed shaft 30 is the winding direction of the coil spring 50 Since it is acting toward the rotation of the rotating cylinder 20 will be impossible. Therefore, the position of the armrest can be set at any position in the direction of the B position between the section corresponding to the step 42 of the guide ring 40, that is, between the B position and the C position.

On the other hand, when the armrest is to be stored in the C position, the armrest body 10 is rotated in the A position direction. Then, as shown in FIG. 10, the coil spring 50 is rotated together with the rotary cylinder 20 so that the free end 53 is in contact with the inclined surface 43 of the guide ring 40. Corresponds to position C. In this state, even if the armrest body 10 is further rotated in the A position direction, only the rotating cylinder 20 rotates and the coil spring 50 does not rotate. This is because the free end 53 of the coil spring 50 is located at the stepped portion 42 of the guide ring 40 and is constrained by the inclined surface 43 and the inner end of the rotary cylinder 20. 50, the fixed end 52 is rotated in the release direction by the rotary cylinder 20, so that the elastic deformation is appropriately in the release direction. Subsequently, when the slit 21 of the rotating cylinder 20 reaches the position corresponding to the free end 53 of the coil spring 50 by the continuous rotation of the armrest main body 10, as shown in FIG. Similarly, the free end 53 of the coil spring 50 is inserted into the slit 21 of the rotating cylinder 20 by compressing the respective windings 51 by the inclined surface 43 of the guide ring 40 to the release direction. It is constrained in the elastically deformed state.

When the armrest main body 10 is rotated to the A position in this state, as shown by the solid line in FIG. 4, the locking protrusion 23 of the rotating cylinder 20 contacts the stopper 32 of the fixed shaft 30. No longer rotated.

As described above, according to the present invention, the armrest can be stably rotated in a required state without a separate coil spring control means as in the prior art, and the armrest is released at its use position by a stopper provided on the fixed shaft. You can only operate between locations. In addition, since the coil spring elastically pushes the fixed shaft even in the released state, it is possible to effectively prevent the armrest from being unnecessarily rotated due to vibration or shaking while driving.

Therefore, the present invention can reduce the number of parts and assembly labor of the armrest as compared to the prior art, as well as it is possible to reduce the cost. In addition, the structurally simple, easy to manufacture, it is possible to ensure the operation precision and reliability of the armrest.

Claims (8)

A rotating cylinder fixed to the armrest body and having a slit formed around the one end and a locking protrusion formed in a radial direction at regular intervals therefrom; A fixed shaft having one end penetrated through the rotary barrel and fixed to the seat frame and having a stopper protruding in a radial direction such that the engaging protrusion can contact the other end; The outer periphery of the fixed shaft is fixedly coupled to the seat frame at intervals, and a stepped portion spaced apart from the rotary cylinder is formed on a part of the contact surface in contact with the other end of the rotary tube is formed with an inclined surface on one side of the stepped portion, A guide ring having a release step; And Armrest rotation, characterized in that it is coupled between the rotary cylinder and the fixed shaft, one end is fixed to one end of the rotary cylinder, the other end is selectively positioned on the step of the slit or guide ring of the rotary cylinder Device. The armrest rotating apparatus according to claim 1, wherein the slit is formed long in the axial direction so that the rotating cylinder has an approximately C-shaped cross section. The armrest rotating apparatus according to claim 1, wherein the release step of the guide ring in contact with the free end of the coil spring protrudes from the contact surface of the guide ring and is inclined downward. The armrest rotating apparatus according to claim 1, wherein a gap is formed between each of the winding parts of the coil spring, so that a free height of the coil spring is longer than a length of the rotating cylinder. The method according to any one of claims 1 to 4, wherein a rectangular support rod is fixed to the seat frame, and a rectangular engagement hole corresponding to the support rod is formed in the fixed shaft in the axial direction, and is supported through the fixed shaft. Armrest rotating device characterized in that the fixed shaft is integrally fixed to the seat frame by a bolt fastened to the rod. The armrest rotating apparatus according to any one of claims 1 to 4, wherein one end of the coil spring is fixed to a fixing hole drilled in one end of the rotating cylinder. The armrest rotation according to any one of claims 1 to 4, wherein one end of the coil spring is fixed to a fixing hole formed by a groove formed in one end of the rotary tube and the locking projection blocking the opening. Device. The armrest rotating device according to any one of claims 1 to 4, wherein one end of the coil spring is fixed by being caught by a groove formed in one end of the rotary tube and a stepped portion of the locking protrusion.