JPS5827447Y2 - Lighting equipment arm fixing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure of a fixed part between a base and an arm that holds a lamp in a lighting equipment such as a jump rear.

As shown in FIG. 1a, a chanterlier in which a plurality of arms 2 are fixed to a base 1 and a lamp 3 is attached to the arms 2 has been conventionally used.
As shown in a partially enlarged view in the same figure, a beading process 4 is applied near the tip of the pipe-shaped arm 2, a thread is cut at the tip, and this threaded portion is inserted into a hole made in the base 1. , the arm 2 is fixed to the base 1 by tightening a nut 6 through a washer 5 on the opposite side of the base 1.

Therefore, a large moment is applied to the attachment part at the base of the arm 2, and if the arm 2 is thin or made of a material with low strength such as aluminum, the arm may break from the base.

The present invention aims to improve such drawbacks and provide a fixing device that does not easily break even when the pipe of the arm 2 is thin or made of weak material.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is an exploded perspective view of an embodiment of the present invention.

In the figure, 1 is a base, 2 is a pipe-like arm, and 8 is a short reinforcing pipe with an inner diameter that fits outside the pipe-like arm 2, and has greater strength than the arm 2.
A bulging beading process 9 is applied to the center part.

On the other hand, the base 1 is provided with a hole 10 into which the reinforcing pipe 8 is fitted.

FIG. 3 shows the assembly process.

First, as shown in FIG.
Insert one end of the pipe-shaped arm 2 into the arm 2, insert a jig inside the arm 2, push it outward, and as shown in the same figure, attach the arm 2 to the reinforcing pipe 8, and bead it. It is bulged inside part 9 and fixed.

Thereafter, as shown in FIG. 1, a lead wire 7 is passed through the pipe-like arm 2, and a lamp 3 is attached to the other end of the arm 2 to construct a jump rear.

In the present invention configured as described above, the base of the arm 2 is fixed to the base 1 in close contact with the strong reinforcing pipe 8, so even if a large moment is applied to the base of the arm 2, The force is dispersed by the reinforcing pipe 8, and a large force is not applied to one part, which prevents the arm 2 from breaking.
, a thin pipe or a pipe made of a weak material such as aluminum can be used for the arm 2.

Additionally, a relatively large amount of force is required to swage the arm 2 onto the base 1, and due to the mechanical equipment involved, it is not possible to swage the arm directly onto the pedestal during the jump rear assembly process. Either cut a thread on the arm and tighten it to the base with a nut as described above to secure it, or fit another mounting bracket to the end of the arm, provide a thread in this bracket, and attach it to the base with a nut. However, in the present invention, as shown in FIG. 4, by caulking a plurality of reinforcing pipes 8 in advance during the manufacturing process of the base 1, the assembling process of the jump rear is improved. Now, the arm can be fixed to the base simply by inserting the arm into the reinforcing pipe and pushing the arm apart with a jig, and there is no need to cut threads in the arm or reinforcing pipe, making manufacturing easy. can get.

[Brief explanation of the drawing]

Fig. 1 is a side view (a) of a conventional jump rear and an enlarged sectional view (b) of a part thereof, Fig. 2 is an exploded perspective view of an embodiment of the present invention;
FIG. 3 is a diagram illustrating the assembly process of an embodiment of the present invention, and FIG. 4 is a perspective view of the main parts of the present invention. 1...Base, 2...Arm, 3...
...Lighting equipment, 7...Lead wire, 8...
Reinforcement pipe, 9...Beading processing section.

Claims (1)

[Scope of utility model registration request] A plurality of short reinforcing pipes with a beaded center part are caulked and fixed to the base of the lighting fixture, and one end of each of the plurality of pipe-shaped arms to which the lighting fixture is attached is inserted into the reinforcing pipes, The inserted part of the pipe-like arm was pushed outward from the inside to the outside, deforming it so that it bulged inside the beaded part, and fixing each pipe-like arm in close contact with each of the plurality of reinforcing pipes. Features a lighting equipment arm fixing device.