JP2581835Y2 - Rotary support device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary support device, and is used, for example, in an armrest height adjusting device for an automobile.

[0002]

2. Description of the Related Art Conventionally, as this kind of rotation support device,
2. Description of the Related Art There is known a device including a base and a rotating member rotatably supported on the base via a pin. A pin hole through which the pin passes was formed in the base. The pin has a shaft passing through the pin hole of the base, and a head located at one end of the shaft and having a larger diameter than the pin hole.

[0003]

However, in the above-mentioned conventional rotary support device, the pin passed through the pin hole of the base is
There has been a problem that it is easy to slip off in the axial direction from the head side. The invention according to claim 1 has been made in view of the above-mentioned problems of the prior art, and an object of the invention is to provide a rotation support device in which a pin passed through a pin hole of a base is hardly removed. It is intended to provide.

[0004] In addition, according to the invention, when the pin is passed through the pin hole of the base, the elastic locking piece is pushed by the head of the pin and is separated from the head of the pin. This is intended to improve the pin insertion property by configuring the pin to bend. Furthermore, in the invention according to claim 2, in addition to the above-mentioned object, the elastic locking piece bends carelessly,
It is intended to prevent the pin from coming off.

[0005]

SUMMARY OF THE INVENTION The present invention is to achieve the above-mentioned object, and its contents will be described below using embodiments shown in the drawings. The invention according to claim 1 is characterized in that when the shaft (31) of the pin (30) is passed through the pin hole (53, 63) of the base (20), the pin head (32) is elastically attached to the pin head (32). Elastic lock that abuts and prevents the shaft from coming off in the axial direction, and is pushed by the head of the pin when the shaft of the pin is passed through the pin hole of the base, and flexes away from the head of the pin. Piece (7
0 to 90).

[0006] The invention according to claim 2 is based on claim 1 described above.
In addition to the features described, a lock piece (100) that abuts against the elastic locking piece (70-90) and prevents the elastic locking piece from bending in the direction away from the head (32) of the pin (30). ).

[0007]

[Operation] Therefore, according to the invention of claim 1,
The shaft (31) of the pin (30) may be inserted in accordance with the pin holes (53, 63) of the base (20). When the pin is inserted, its head (3
2), the elastic locking pieces (70 to 90) bend in a direction away from the head of the pin.

After that, when the shaft of the pin passes through the pin hole of the base, the elastic locking piece is restored by its elastic force and comes into contact with the head of the pin. Therefore, the elastic locking piece abuts on the head of the pin, thereby preventing the pin from coming off in the axial direction. According to the invention of claim 2, after the pin (30) is inserted, the locking piece is inserted.
By making the (100) abut against the elastic locking pieces (70 to 90), the bending of the elastic locking pieces can be prevented.

[0009]

1 to 4 show a first embodiment of the present invention. FIG. 1 is a perspective view of a main part of a rotary support device, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof. 4 shows the same side view. 2 to 4, reference numeral 10 denotes a rotation support device, and the device 10 is used, for example, in an armrest height adjustment device for an automobile.

[0010] The rotation support device 10 can be roughly classified as shown in FIG.
As shown in FIGS. 4 to 4, a base 20 and a pin 30
And a rotating member 40 rotatably supported via the The base 20 has a plate shape as shown in FIGS.
It is integrally formed of a thermoplastic resin such as ABS having appropriate elasticity and rigidity. On the lower surface of the base 20, as shown in FIGS.
A pair of left and right bearing portions 50 and 60 for stopping the shaft 30 are formed.

As shown in FIGS. 1 to 4, each of the bearing portions 50 and 60 extends in a tongue shape from the lower surface of the base 20, and a pair of left and right bearing pieces 51, 52, 61 and 62 which are separated from each other in the left and right directions. , Respectively. And bearing pieces 51, 52, facing each other
61 and 62 are oppositely penetrated to the left and right, and pin 3
Pin holes 53, 63 each having a circular cross section and having an inner diameter large enough to pass 0 are formed.

The left and right side edges of the base 20 are shown in FIG.
As shown in FIGS. 3 and 4, a pair of right and left sides projecting rearward and rightward to the left and right outer sides, slightly apart from the left and right side edges, and extending substantially in parallel with the left and right side edges in a substantially J-shape. Elastic locking pieces 70 and 80 are formed respectively. The distal ends of the elastic locking pieces 70, 80 extend toward left and right outer bearing pieces 51, 61 located along the left and right side edges of the base 20, respectively.

As shown in FIGS. 1 and 4, on the lower surface of the distal end of each of the elastic locking pieces 70 and 80, a claw projecting in a sawtooth cross section is provided.
71 and 81 are formed respectively. Tapered surfaces 71, 81 that are inclined toward the insertion direction of the pin 30 are formed on the outer surfaces of the tips of the claws 71, 81, respectively. The rotating member 40
Are used two as shown in FIGS.
40 is a long arm, for example, a rigid POM
Molded integrally with a thermoplastic resin. And
The horizontal width of the left and right of each rotating member 40 is, as shown in FIGS.
The two bearing pieces 51, 52, 61, 62 are set to be equal to or less than the facing interval,
The two bearing pieces 51, 52, 61, 62 opposing each other are fitted into the gap. Both ends of each rotating member 40 penetrate left and right, communicate with the pin holes 53, 63 of the bearing pieces 51, 52, 61, 62, respectively, and have an inner diameter that is large enough for the pin 30 to pass, here the base 20. The through holes 41 having the same inner diameter as the pin holes 53, 63 are formed with circular cross sections.

[0014] As shown in FIGS.
Each pin 30 is used in this embodiment. Each pin 30 has a shaft portion 31 having an outer diameter substantially equal to the inner diameter of the pin hole 53, 63 of the base 20, and is located at one end of the shaft portion 31 and is larger than the pin holes 53, 63. And a circular head 32 having a large outer diameter, and is formed of, for example, metal. As shown in FIGS. 3 and 4, the length of the shaft portion 31 is set to be longer than the facing interval between the two bearing pieces 51, 52, 61, and 62 of the base 20 facing each other, and the tip is formed in a tapered shape. Have been.

The thickness of the head 32 of the pin 30 is shown in FIGS.
As shown in FIG. 4, the outer surfaces of the bearing pieces 51, 61 located on the left and right outer sides of the base 20 and the claw portions 71, 81 of the elastic locking pieces 70, 80 facing the outer surfaces, respectively. It is formed so as to be almost equal to the interval facing the vertical surface. Therefore,
With the shaft portion 31 of the pin 30 passed through the two bearing pieces 51, 52, 61, 62, the claw portions 71,
81 almost vertical surfaces abut.

Next, the rotation support device 10 having the above configuration
Will be described. First, one end of each rotating member 40 is inserted into the facing space between the two bearing pieces 51, 52, 61, 62 of the base 20 facing each other, and the through hole 41 of each inserted rotating member 40 and the bearing piece 51 are inserted. , 52, 61, and 62 are aligned with the pin holes 53 and 63. Next, the tapered tip of the shaft portion 31 of the pin 30 is inserted into the pin holes 53, 61 of the bearing pieces 51, 61 located on the left and right outer sides, respectively.
From 63, through the through hole 41 of each rotating member 40, it is inserted toward the pin holes 53, 63 of the bearing pieces 52, 62 located inside.

At the time of insertion, the head 32 of the pin 30 comes into contact with the claw portions 71, 81 of the elastic locking pieces 70, 80, respectively. Here, when the pin 30 is pushed further inward, the claws 71, 81
The respective tapered surfaces 71 and 81 are pressed and bent by the outer peripheral surface of the head 32 of the pin 30. That is, each of the elastic locking pieces 70 and 80 deflects from its base end toward the lower surface of the base 20 against its elastic force.

After that, when the pin 30 is further pushed in, the bearing pieces 51 and 61 and the pawl portions 71 and 81 located on the left and right outer sides of the base 20 are formed.
And get stuck within the interval. For this reason, each of the elastic locking pieces 70, 8
When the “0” is restored by the elastic force of the resin, as shown in FIG. 1, their substantially vertical surfaces come into contact with the end surface of the head 32 of the pin 30. Therefore, as shown in FIG. 2, the two rotating members 40 are pivoted about the shafts 31 of the respective pins 30 to form the base 20.
It is rotatably supported with respect to.

Further, each pin 30 is prevented from coming off by its head 32 abutting on a substantially vertical surface of each elastic locking piece 70, 80. In the present embodiment, the height adjustment device of the armrest for an automobile has been described as an example, but the invention is not limited to this, and it can be widely used as a holder for a pin that requires sliding, such as a cup holder.

On the other hand, FIG. 5 shows a second embodiment of the present invention, and FIG.
The feature of the present embodiment is that, as shown in FIG. 5, a lock piece 100 that abuts against an elastic locking piece 90 and prevents the elastic locking piece 90 from bending in a direction away from the head 32 of the pin 30. It has a point.

First, as shown in FIG. 5, a claw 91 projecting from the upper surface of the elastic locking piece 90 in a mountain shape in cross section is provided at the distal end.
And a projection 92 protruding from the lower surface in a semicircular cross section, respectively. As shown in FIG. 5, the tip of the claw portion 91 has a tapered surface 93 located on the outer surface thereof and inclined upward in the insertion direction of the pin 30, and an inner surface opposed to the tapered surface 93. An inclined contact surface 94 that is located and is inclined downward in the insertion direction of the pin 30 is formed. The inclined contact surface 94 is inclined more steeply than the tapered surface 93.

The lock piece 100 is, as shown in FIG.
It is flat and can be detachably fixed to the lower surface of the base 20. Further, the lock piece 100 is fixed in a state separated from the lower surface of the base 20 by a distance equal to the height of the protrusion 92 of the elastic locking piece 90, and the upper surface of the lock piece 100 is It contacts the part 92. In the present embodiment, the same components as those of the first embodiment described above are denoted by the same reference numerals, and a specific description thereof will be omitted.

According to this embodiment, when the pin 30 is inserted,
By the action of the tapered surface 93 of the claw portion 91 of the elastic locking piece 90, the elastic locking piece 90 bends downward. After that, the elastic locking piece 90
Is restored, the inclined contact surface 94 of the claw portion 91 contacts the outer peripheral surface of the head portion 32 of the pin 30, as shown in FIG. For this reason, on the outer peripheral surface of the head 32 of the pin 30, the inclined contact surface 94 of the claw portion 91 is provided.
Are securely in contact with each other, so that the backlash of the pin 30 can be prevented.

After the pins 30 are inserted, the lock pieces 100 are fixed to the lower surface of the base 20 as shown in FIG. When the lock piece 100 is fixed, as shown in FIG.
Of the projection 92 abuts on the upper surface of the lock piece 100.
For this reason, the protrusion of the elastic locking piece 90 abuts on the upper surface of the lock piece 100, thereby preventing the elastic locking piece 90 from bending.

Therefore, the elastic locking piece 90 is
Since it is not bent by 0, the pin 30 can be prevented from coming off due to the bending of the elastic locking piece 90. The elastic locking piece 90
The protrusion 92 of the lock piece 100
Can surely be brought into contact with the upper surface of the substrate. On the other hand, FIG.
Shows another embodiment of the present invention, which is a sectional view of a main part of a rotation support device.

The feature of this embodiment is that, as shown in FIG. 6, a projection 101 having a semicircular cross section is formed on the upper surface of the lock piece 100 so as to contact the flat lower surface of the elastic locking piece 90. In the present embodiment, the same components as those in the second embodiment described above are denoted by the same reference numerals, and a specific description thereof will be omitted. According to this embodiment, when the lock piece 100 is fixed, the protrusion 101 abuts on the flat lower surface of the elastic locking piece 90, so that the elastic locking piece 90 is prevented from bending.

In this embodiment, the lock piece 100
The protrusion 101 is formed on the upper surface of the elastic locking piece 90 in the second embodiment.
Projections may be formed on both opposing surfaces of the lock piece 100 and the elastic locking piece 90, respectively.

[0028]

[Effects of the Invention] The present invention is configured as described above, and has the following effects. Claim 1
According to the invention described above, it is possible to provide a rotation support device that not only can prevent the removal of the pin, but also can easily and quickly insert the pin.

In addition to the above, according to the invention, since the bending of the elastic locking piece is prevented by the locking piece, not only the pin can be more securely prevented from coming off, but also the pin can be prevented from coming off.
The backlash of the pins can be prevented beforehand.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention and is a perspective view of a main part of a rotation support device.

FIG. 2 is a front view of the rotation support device.

FIG. 3 is a plan view of the rotation support device.

FIG. 4 is a side view of the rotation support device.

FIG. 5 shows a second embodiment of the present invention, which is a cross-sectional view of a main part of the rotation support device.

FIG. 6 shows another embodiment of the present invention, which is a sectional view of a main part of the rotation support device.

[Explanation of symbols]

 10 Rotation support device 20 Base 30 Pin 40 Rotating member 53,63 Pin hole 70 ~ 90 Elastic locking piece 100 Lock piece

Claims (2)

(57) [Scope of request for utility model registration] 1. A base, and a rotating member rotatably supported on the base via a pin, wherein the base is formed with a pin hole through which the pin passes, and wherein the pin is In a rotating support device having a shaft passing through a pin hole and a head located at one end of the shaft and having a larger diameter than the pin hole, the base has a shaft of a pin in the pin hole. When it passes through, it elastically abuts the head of the pin, preventing its removal in the axial direction, and when passing the shaft of the pin through the pin hole of the base, it is pushed by the head of the pin, A rotation support device comprising an elastic locking piece that flexes in a direction away from the head of the pin. 2. The rotation support according to claim 1, further comprising a lock piece that abuts on the elastic locking piece and prevents the elastic locking piece from bending in a direction away from the head of the pin. apparatus.