JPS6137150Y2 - - Google Patents

Description

[Detailed Description of the Invention] The object of the present invention is to improve the contact of a switch contact piece in a switch used in a lighting equipment.

Conventionally, pull switches, push button switches, etc. used in lighting equipment, which have a rotating contact piece structure, have a rotating contact piece inserted into a conductive shaft provided on the switch base, and this rotating contact piece is provided around the conductive shaft body. The contacts are brought into contact one after another, and current is passed between the conductive shaft and the contacts via the rotating contact piece. In the case of this switch structure, the rotary contact piece must be able to rotate smoothly around the conductive shaft, so the rotary contact piece is inserted relatively loosely into the conductive shaft. Therefore, the contact between the conductive shaft and the rotating contact piece tends to be unstable, and there are many cases where arcing or burnout accidents occur due to unnecessary contact.

The present invention solves these conventional drawbacks by inserting a rotary contact piece into a conductive shaft provided on a switch base, rotating the rotary contact piece, and providing the rotary contact piece around the conductive shaft body. The switch is adapted to be brought into contact with the contacts one after another, and is characterized in that a spring wire is provided at both ends of the rotary contact piece and whose central part contacts the conductive shaft.

Examples thereof will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a box-shaped insulating switch base with one end open. A conductive shaft 2 is provided at the bottom of the base. Around the conductive shaft 2 are partition walls 3...
A contact point 4... is provided across the. Reference numeral 5 denotes a rotating contact piece, to which a spring wire 7 is attached, both ends of which are fitted into notches 6, as shown separately. 8 is a rotating handle, 9 is a coil spring, and 10 is a shaft support. The rotary contact piece 5 is provided with a pawl 11, and on the other hand,
The rotary handle 8 is provided with a feed pawl 12. Reference numeral 13 denotes an annular recess, around which a groove 14 is provided. Further, 15 is a handle.

Note that the switch base 1 is provided with mounting recesses 16 for the shaft supports 10, respectively.

Next, the assembly of the switch of the present invention will be explained.
First, the rotating contact piece 5 is inserted through the conductive shaft 2, and the spring wire 7 is brought into contact with the side surface of the conductive shaft 2 so that it is on the side that is stretched in the notch 6. Next, the rotary handle 8 is inserted, and then the coil spring 9 is inserted so that one end thereof is fitted into the annular recess 13 and the cut groove 14. And the shaft support 1
0 and positioned so that both ends thereof are fitted into the mounting recesses 16, and then the ends of the conductive shaft body 2 are caulked and fixed. The other end of the coil spring 9 is assembled by being hooked onto the side surface of the shaft support 10 to apply an urging force to the coil spring. The resultant assembly is shown in FIG. 2.

Next, the operation of the switch of the present invention will be explained.
When the pull handle 15 is pulled, the feed pawl 12 of the rotating handle 8
Since the rotary contact piece 5 catches the claw 11, the rotary contact piece 5 climbs over the partition wall 3 and comes into contact with the adjacent contact point 4. Next, when the puller 15 is released, the rotating handle 8 is returned to its original position by the biasing force of the coil spring 9.
Here, the features of the present invention will be described. Since the rotating contact piece 5 needs to be inserted relatively loosely into the conductive shaft 2, the contact state is unstable, so the spring wire 7 allows the inserted part of the rotating contact piece 5 to stably contact the conductive shaft 2. Become something. In FIG. 2, the insertion portion of the rotary contact piece 5 is in stable contact with the back side of the conductive shaft body 2. Further, the use of the spring wire 7 has the advantage that the rotation of the rotary contact piece 5 is not hindered much. In addition, the spring wire 7
It also has the advantage that a conductive path between the rotary contact piece 5 and the conductive shaft body 2 is secured through the rotary contact piece 5.

In FIG. 3, the portion of the conductive shaft 2 with which the spring wire 7 comes into contact is formed into an annular groove shape 17.

As is clear from the above, the present invention solves poor contact in a switch in which a rotary contact is inserted through a conductive shaft by bringing the center part of a spring wire attached to the rotary contact into contact with the conductive shaft. This problem is solved by making sure that the insertion part comes into contact with the conductive shaft, thereby preventing arcing or burnout accidents caused by poor contact, and providing a highly reliable switch with reliable operation.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a switch according to an embodiment of the present invention, FIG. 2 is a side sectional view of the same when assembled, and FIG. 3 is a side sectional view of a main part of a switch according to another embodiment of the present invention. 1... Switch base, 2... Conductive shaft, 3...
Partition wall portion, 4... Contact, 5... Rotating contact piece, 6... Notch, 7... Spring wire, 8... Rotating handle, 9...
... Coil spring, 10 ... Shaft support, 11
...Claw, 12...Feed claw, 13...Annular recess, 1
4... Cut groove, 15... Pull, 16... Mounting recess, 17... Annular groove.

Claims (1)

[Claims for Utility Model Registration] (1) A rotary contact piece is inserted into a conductive shaft provided on the switch base, and the rotary contact piece is rotated and sent to sequentially contact the contacts provided around the conductive shaft. The switch is characterized in that a spring wire is provided at both ends of the rotary contact piece and whose central part contacts the conductive shaft. (2) The switch according to claim 1 of the utility model registration, wherein the portion of the conductive shaft with which the spring wire comes into contact is formed into an annular groove shape.