JPH04209405A - Universal fixture - Google Patents

Abstract

PURPOSE:To enable large holding power to be stably obtained, depending upon the tightening amount of a set screw by providing the set screw at a position different from a shaft position. CONSTITUTION:A tightening fixture 2 has a pair of side pieces faced to both axial sides of the bearing hole 5 of a turning section 1, and forms a pair of shaft holes 7 aligned with the bearing hole 5 through a side piece 6. In addition, the fixture 2 has a pair of tightening holes 8 and 9 through the outer side of the turning section at a position away from the shaft hole 7 at the side piece 6. According to the aforesaid construction, the turning section 1 is so supported on a shaft 3 as to be capable of turning. When a set screw 4 is tightened, the side piece 6 comes in frictional contact and secured with both sides of the turning section 1, thereby restricting the turning motion of the aforesaid section 1. In this case, the screw 4 is fitted at a position off the shaft 3 and, therefore, even when the screw 4 is strongly tightened, the side piece 6 always comes in frictional contact and secured with the turning section 1 at a position off the turning center thereof. Consequently, large holding power can be stably obtained, depending upon a tightening amount. Also, even when the turning section 1 rotates, the screw 4 does not turn concurrently. The screw 4 is thereby made free from loosening.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flexible device that is applied to desk lamps and the like.

[Conventional technology]

As shown in FIG. 9, there is a desk lamp in which an arm 52 is rotatably attached to a device body 50 via a swivel 51, and a lamp 53 is attached to the tip of the arm 52 so as to be swingable.

As shown in FIGS. 10 and 11, this flexible device is
The bearing has a rotating part 55 having a hole 54 and a pair of side pieces 56 facing each other on both sides of the rotating part 55.
A pair of shaft holes 57 are formed in the side piece 56, and the shaft holes 57 and the bearing are passed through the hole 54 to rotatably support the rotating part 55. Thumb screws 59 are provided that frictionally lock the side pieces 56 to both sides of the rotating portion 55 by tightening.

[Problem to be solved by the invention]

However, when this flexible device is tightened, as the metal fitting 58 is tightened with the thumbscrew 59, at first friction locking occurs in a wide range of both sides of the rotating portion 55 and the side piece 56, but as it is tightened more strongly, the 11th As shown in the figure, the edge of the shaft hole 57 is deformed and the friction surface moves toward the center, and as the tightening force increases, the rotation center of the rotation portion 55 and the friction surface of the fitting 58 are tightened. Because of this, there was a possibility that the arm 52 would sag due to lack of holding force.

In addition, in order to increase the friction surface, as shown in FIG. 12, when tightening, the metal fitting 58 is greatly expanded outward to form a friction surface at a position far away from the shaft hole 57, thereby preventing friction from occurring near the shaft hole 57. Even if this is prevented, if the thumbscrew 59 is strongly tightened, the side piece 56 will deform as shown in FIG. Due to the warpage of 56, the contact surface moved toward the center and the holding force was reduced, making it impossible to obtain a stable holding force.

Furthermore, there was a concern that the thumbscrew 59 would rotate together with the rotation of the rotating portion 55, causing the thumbscrew 59 to become loose.

Therefore, an object of the present invention is to provide a flexible device that can stably increase the holding force depending on the amount of tightening.

[Failure to solve the problem]

In the flexible device of the present invention, the bearing has a rotating part having a hole, and the bearing of the rotating part has a pair of side pieces facing each other on both sides of the hole in the axial direction, and the bearing has a pair of side pieces that are aligned with the hole. A shaft hole is formed in the side piece, and a pair of fastening holes are formed on the outside of the rotating part at a position remote from the shaft hole of the side piece. The bearing has a shaft that is passed through a hole to rotatably support the rotating part, and the fastener is passed through a hole and is tightened to frictionally lock the side piece to the side surface of the rotating part. It is equipped with a tightening screw.

[Effect]

According to the configuration of the present invention, the rotating part is supported by the shaft and can be rotated, or when the tightening eagle is tightened, the side piece is frictionally engaged with both sides of the rotating part, so that rotation is restricted. In this case, since the tightening screw is installed in a different position from the shaft, even if the tightening screw is tightened strongly, it will always be frictionally locked at a position away from the center of rotation, so the tightening force will be larger depending on the amount of tightening. or stably obtained. Also, even when the rotating part is rotated, the tightening screws do not rotate together, so there is no need to worry about the tightening screws coming loose.

〔Example〕

A first embodiment of the present invention will be described based on FIGS. 1 to 4. That is, this flexible device has a rotating part I, a tightening fitting 2, a shaft 3, and a tightening screw 4.

The rotating part l has a bearing hole 5. Rotating part 1 is arm 10
It has a disk shape provided at one end, and its half circumference has a small radius (to form a pair of stepped portions 11).

To tighten the metal fitting 2, the bearing of the rotating part l has a pair of side pieces 6 facing each other on both sides of the hole 5 in the axial direction, and the bearing has a pair of shaft holes 7 aligned with the hole 5 with the side pieces 6. and the shaft hole 7 of the side piece 6
A pair of tightening holes 8 are provided on the outside of the rotating part l at a position away from the
, 9.

For tightening, the metal fitting 2 is bent into a U-shape. In the case of a desk lamp, the bottom piece 12 of the metal fitting 2 is attached to an angle 13 with screws (not shown), and a pair of substantially semi-cylindrical bodies 14 are attached to both sides of the angle 130 with screws 15. The end of the main body 14 has a 1/4 spherical shape, and the arm 1
A notch 25 is formed in the portion through which 0 passes. Also, attach the bottom plate 16 to the lower end of the angle 13 with screws 17,
The bottom plate 16 is attached to a base 19 placed on the floor by screws 18. Further, the tightening hole 9 is formed as a screw hole. 24 is a tightening adjustment hole formed at a position aligned with the tightening hole 8 of the main body 14; 26 is a through hole of screw 5; 27
28 is a tapped hole for the screw 15, 29 is a through hole for the screw 170, 30 is a tapped hole for the screw 18, and 31 is a through hole for the screw 18.

The shaft 3 is passed through the shaft hole 7 and the bearing is passed through the hole 5 to rotatably support the rotating part 1. The shaft 3 in the example has a head 20,
It has a hole 21 at the tip, and the hole 21 (=pine needle pin 22 for preventing removal) is locked therein.

The tightening screw 4 is passed through the holes 8 and 9 and frictionally locks the side piece 6 to the side surface of the rotating portion 1 by tightening. In the embodiment, the tightening screw 4 is tightened through the use hole 8, and the tightening screw is passed through the use hole 9.
It is attached by screwing into the

In FIG. 4, reference numeral 23 denotes a lamp that is swingably attached to the tip of the arm]0.

According to this embodiment, the rotating part 1 is supported by the shaft 3 and can be rotated, or when the tightening screw 4 is tightened, the side pieces 6 are frictionally engaged with both sides of the rotating part 1, so that the rotating part 1 cannot be rotated. Regulated.

In this case, since the tightening screw 4 is provided at a different position from the shaft 3, even if the tightening screw 4 is strongly tightened, it will always be friction-locked at a position away from the center of rotation, so the tightening will be greater depending on the amount of rotation. Power is obtained stably. In addition, even if the rotating part 1 is rotated, the tightening screw 4 does not rotate together, so the tightening screw 4
No need to worry about it coming loose.

A second embodiment of the invention is shown in FIG. That is, in this flexible device, in the first embodiment, the tightening hole 8.9 is formed so that the position of the tightening screw 4 is within the rotation locus of the stepped portion 11 of the rotating portion l. It is. 23 is a screw for attaching the metal fitting 2 to the angle 13. Therefore, when the rotating portion 1 rotates by a predetermined amount or more, it is stopped by the stepped portion 11 or the tightening screw 4, and the rotation is restricted. That is, since the tightening screw 4 also serves as a stopper, there is no need to provide a separate stopper means, which reduces cost and space.

A third embodiment of the invention is shown in FIGS. 6 and 7.

That is, in the second embodiment, in this flexible device, the circumferential surface of the rotating portion 1 on the smaller radius side is formed into a portion a having a radius R1 and a portion having a radius R2.

>Rt), the circumferential surface of radius R3 is frictionally engaged with the tightening screw 4 at a predetermined rotational position of the rotating portion l, as shown in FIG.

When the arm 10 is tilted forward, the moment due to the weight of the lamp increases, so the holding force of the rotating part l is required to be larger. Frictional locking enhances the holding force and makes it difficult for the arm 10 to fall. The rest is the same as the second embodiment.

A fourth embodiment of the invention is shown in FIG. That is, in the second embodiment, this flexible device has the tightening screws 4 provided at two locations corresponding to the pair of stepped portions II;
It functions as a stopper for the front maximum rotation position and the rear maximum rotation position of the arm 10, and the two-point tightening can further increase the holding force of the arm 10.

〔Effect of the invention〕

According to the adjustable device of this invention, since the tightening screw is provided at a different position from the shaft, even if the tightening screw is strongly tightened, it will always be frictionally locked at a position away from the center of rotation, so the tightening will depend on the amount. A large holding force can be stably obtained. Further, even when the rotating part is rotated, the tightening screws do not rotate together, so there is no need to worry about loosening of the tightening screws.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the first embodiment of the invention, Fig. 2 is a sectional view of the adjustable device, Fig. 3 is a perspective view thereof, Fig. 4 is a perspective view of the desk lamp, and Fig. 5 is a sectional view of the adjustable lamp. 6 is a sectional view of the third embodiment, FIG. 7 is a sectional view of the rotating state, FIG. 8 is a sectional view of the fourth embodiment, and FIG. 9 is a sectional view of the fourth embodiment. A side view of a desk lamp to which the conventional example is applied, Fig. 10 is a cross-sectional view of the flexible device, Fig. 11 is a cross-sectional view showing the deformed state when the fitting is tightened, and Fig. 12 is a cross-sectional view of the lamp when tightened. FIG. 13 is a cross-sectional view of a conventional example in which the metal fitting is greatly expanded, and a cross-sectional view of the state in which the metal fitting is tightened. 1... Rotating part, 2... Tightening metal fittings, 3... Shaft, 4
...Tightening screw, 5...Bearing is hole, 6...Side piece,
7... Shaft hole, 8.9... Tightening hole patent applicant Matsushita Electric Works Co., Ltd. Figure 5 Figure 6 Figure 8 ZJ 11 lJ Figure 7

Claims (1)

[Claims] A rotating part having a bearing hole, a pair of side pieces facing each other on both sides of the bearing hole of the rotating part in the axial direction, and a pair of shaft holes aligned with the bearing hole are formed in the side pieces. and a tightening fitting having a pair of tightening holes formed on the outside of the rotating part at a position away from the shaft hole of the side piece, and a tightening metal fitting that is passed through the shaft hole and the bearing hole to rotate the rotating part. A flexible device comprising a shaft that is freely supported, and a tightening screw that is passed through the tightening hole and frictionally locks the side piece to the side surface of the rotating part by tightening.