JPS5927046B2 - How to fix wire tensioning bushings in lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for fixing a wire tensioning bush used when pulling out a power supply connection socket from an electrical appliance.

Generally, electrical appliances have a switch on the appliance body.
A socket pull-out hole is formed in the wall surface of the device body, and a socket for connecting a power source connected to the switch via a cord is pulled out, and a wire tension-stopping bush is fitted into the socket pull-out hole to hold the cord. This prevents the tensile force applied to the cord from acting directly on the connection between the cord and the switch.

The most common structure is shown in FIG. In the figure, 1
is the main body of the electrical appliance, 2 is a switch fixed to the main body 1,
3 is a socket for connecting a power source; 54 is a cord for connecting the socket 3 to the switch 2; and 5 is a bush inserted into the cord 4, which is fitted into a cord extraction hole provided on the wall of the main body 1. The bush 5 in an electric appliance having such a configuration is such that the tensile force applied to the cord 4 is applied to the switch 2.
In order to prevent tension from being applied to the electrical connection portion 21 of the cord 4, a knot 41 is often formed on the cord 4 inside the bush 5 to prevent tension. Of course, depending on the material of the bush 5 and the holding power of the cord 4, the knot 4
1 may not be necessary. However, the assembly work for such a structure involves inserting the bushing 5 into the cord 4, inserting one end of the cord 4 into the cord pull-out hole from the outside of the main body 1, fitting the bush 5 into the cord pull-out hole, and doing the necessary work. After forming a knot 41 in the cord 4, it is connected to the electrical connection part 21 of the switch 2. On the other hand, the switch 2 is fixed to the main body 1 with a screw or the like either before or after the cord 4 is connected. Such assembly work requires work from both the inside and outside of the main body 1, so the main body 1 must be
There is a problem in that work efficiency is poor because it requires reversal.
In particular, there is a problem in that the fitting work of fitting the bush 5 into the cord pull-out hole becomes difficult as the holding force of the bush 5 for the cord 4 increases. Note that this type of bush 5 generally has a groove on its outer periphery that fits into the edge of the cord pull-out hole, so originally this fitting operation was extremely troublesome and inefficient. SUMMARY OF THE INVENTION In view of these circumstances, the present invention provides a method for easily attaching and fixing a wire tensioning bushing to a socket pull-out hole provided in the wall of an electrical appliance body.

FIG. z and FIG. 3 show embodiments of the present invention, and the content of the present invention will be explained using a ring-shaped fluorescent lamp as an electric appliance.

In the figure, 6 is a backbone, and 7 is a reflector, both of which constitute the main body of the instrument. Reference numeral 8 denotes a switch, which has a pull switch integrated with a lighting tube socket 81, a mounting leg 82 for attaching to the back bone 6, and a contact portion 83 for contacting the back surface of the reflector plate 7.

That is, this switch 8 is made by inserting and locking the engaging part provided on the mounting leg 82 into the mounting hole 61 provided on the backbone 6, and then covering it with the reflector plate 7 and fixing it to the backbone 6. The structure is such that the portion 83 is fixed to the backbone 6 by pressing it with the back surface of the reflecting plate 7. The lighting tube socket 81 provided in the switch 8 has its insulating cover protruding from the through hole 71 formed in the reflector plate 7, and the lighting tube 72
The cap prevents short-circuiting between the lighting tube socket 81 and the reflector plate 7, and is also used for positioning the switch 8 at the same time. Incidentally, the reflection plate 7 is attached to the backbone 6 by, for example, being fixed with screws 72 using the flanges of both. At this time, the lamp holder 73 holding the annular fluorescent lamp is often fixed at the same time. 84 is a cord connecting the switch 8 and the socket 85 for power connection; 86
is a bushing integrally fused to the cord 84.

This bush 86 has a flat plate shape and has a dimension larger than the dimension of the socket extraction hole 62 into which the socket 85 formed in the back bone 6 is inserted. In addition, Bushiyu 86
A convex portion 87 provided on the switch 8 is configured to engage with a notch 88 formed in the mounting leg 82 of the switch 8 as a bushing holding portion. 63 is a ballast, and 74 is a lamp socket, which is connected to the switch 8 as required, and the lamp socket 74 is pulled out from a notch 75 provided in the reflector plate 7.

Regarding the method of assembling a fluorescent lamp device having such a configuration, the socket 85 for power connection, which is previously connected to the switch 8 via the cord 84, is inserted into the socket pull-out hole 62 provided in the back bone 6. The socket pull-out hole 6 is opened with a bush 86 held in advance by the cord 84.
2, place the switch 8 on top of it, and then close the switch 8.
The mounting legs 82 of the backbone 6 are fitted into the mounting holes 61 of the backbone 6 and temporarily fixed.

By fixing the reflector 7 to the back bone 6, the switch 8 is fixed and the bush 86 is also fixed at the same time. Incidentally, if the socket 85 is inserted into the notch 88 of the switch 8 with the protrusion 87 of the bush 86 engaged in advance, and the switch 8 is attached to the backbone 6, the bush 86 can be fixed at the same time. Work becomes even easier.

In this way, the socket pull-out hole 62 is formed to have a larger size than the socket 85 so that the socket 85 can be inserted easily, and the bush 86 is formed to have a larger size than the socket draw-out hole 62 so that the bush 86 can be brought into contact with the socket draw-out hole 62. Touch 86 with backbone 6 and switch 8.
Since the bushing 86 is clamped and fixed, the installation work of the bush 86 can be done from one direction, which has the effect of making it easier to assemble the instrument body and improving work efficiency. This advantage is particularly effective when attempting to automate work, and is extremely effective in streamlining assembly work. The bush 9 shown in FIG. 4 has a protrusion 91 that fits into a socket pull-out hole 62 provided in the back bone 6.
By providing a taper on the side surface of the protrusion 91
By pushing the protrusion 9 into the socket extraction hole 62,
This has the effect of strengthening the force that holds the cord passing through the cord. In the embodiment described above, the bush 86 is integrally fused and molded with the cord 84, but it does not necessarily have to be integrally molded, but may be held by the cord 84 in advance.

As explained in detail above, the present invention provides a method for pulling out a cord connecting a switch provided in the main body of an electric appliance and a socket for connecting a power source through the socket draw-out hole formed in the backbone of the main body. A bushing that closes and holds the cord and acts as a tension stopper for the cord is easily attached to the back bone.

That is, the size of the bush is made larger than the cord extraction hole, and the bush is held in advance by the cord. This button is placed inside the back bone, and the switch is placed so that the button is held between the back bone and the switch.
The contact portion of the switch with the reflector is pressed by fixing the reflector to the back bone, and the work of fixing the reflector fixes the switch and further fixes the bush. Therefore, there is no need for the conventional troublesome work of fitting the groove on the periphery of the bush into the cord pull-out hole when fixing the bush, and it is also extremely easy to fix the bush or switch by attaching it to the backbone of the reflector. This has the effect of greatly improving work efficiency because multiple tasks are performed at the same time.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional cord drawer structure, Fig. 2 to Fig. 4 show an embodiment of the present invention, Fig. 2 is an exploded perspective view of the main body of the instrument, and Fig. 3 is a sectional view of main parts. , FIG. 4 is a cross-sectional view showing the mounting state of a bush showing another embodiment.

Claims (1)

[Scope of Claims] 1. A switch is provided in a lighting equipment main body consisting of a backbone and a reflector, and a power supply connection socket connected to the switch via a cord is pulled out from a socket extraction hole formed in the backbone, and the In the device for fixing a wire tension-stopping bush that supports a cord so as to close the draw-out hole, the switch has a mounting leg to the backbone, a bush holding part, and a contact part to the reflector, and the socket drawer is fixed to the socket. A bush with a size larger than the hole is held on the cord in advance, and the bush is arranged so as to close the socket extraction hole, and the bush holding part of the switch is brought into contact with the bush, and the bush is held between the backbone and the switch. By arranging the switch and fixing a reflector to the backbone, the contact part of the switch is pressed by the back of the reflector, and at the same time the bush closes the pull-out hole, the bush is moved between the switch and the backbone. A method for fixing a wire tension-stopping bush in a lighting equipment, which is characterized by clamping and fixing. 2. When arranging the switch on the backbone, the mounting legs provided on the switch are fitted into the mounting holes provided on the backbone, and at the same time as positioning, temporary fixing is performed prior to pressing the contact portion with the reflector. A method for fixing a wire tension-stopping bush in a lighting fixture according to claim 1. 3. A method for fixing a wire tension stopper bush in a lighting fixture according to claim 1, wherein the bush is provided with a tapered protrusion that fits into a socket extraction hole.