JPS5832216Y2 - Switch cord connection terminal board device - Google Patents

Description

[Detailed description of the invention] This invention is to insert the leg of a contact stud that passes through the insulator of an electric switch on the back side of the insulator, spread the end face of the leg of the contact stud, and swage it, and fix it at the same time. The terminal board has an insertion hole through which the leg of the contact stud passed through the insulator is inserted on the back side of the insulator, and a slight bulge at the edge of the hole of the reading tag. A contact connecting part A that forms a seat with a handle, a main caulking piece that stands up from an edge slightly away from the connecting part A, and a cut-and-raised piece with an interval for passing the core wire of the cord between the main caulking piece and the main caulking piece. A caulking part C is provided which is made of a sub caulking piece that stands upright and opposes the main caulking piece, and the end face of the leg of the contact stud is spread out and crimped onto the seat of the terminal board, and the seat is It is characterized by being crimped onto the back surface of the insulator.

A caulking protrusion or a through hole is formed on a conductive flat plate that holds and connects the cord, and the conductive flat plate is stacked with a board such as an electric circuit board or a lead board, and the caulking protrusion is inserted into the through hole of the plate. A coupling device in which screws are fixed by caulking through the conductive plate or through screw holes in the conductive plate and screw holes in the plate body is disclosed in Japanese Utility Model Application Publication No. 48-72481 and Japanese Utility Model Application Publication No. 48-48- It is disclosed in Japanese Patent No. 38390 and the like and is publicly known.

However, in conventional switches that use contact studs, the legs of the contact studs are arbitrarily placed through the insulator, and the legs are caulked and fixed on the back side, and the core wire of the cord (lead wire) is connected to the caulked part. However, it has the disadvantage of poor workability, and furthermore, there is no thought of inserting the through hole of each of the known conductive plates into the leg of the contact stud, and even if it were inserted, it would not work well with the leg of the contact stud. Since the crimping of the conductive plate to the back surface of the insulator may become defective, it is necessary to perform crimping work to maintain a constant degree of crimping due to the widening of the end face of the leg of the contact stud.

However, such strict caulking work is not only difficult in practice, but also the caulking may loosen during long-term use of the switch, or the insulator may shrink in the thickness direction due to aging, and the conductive plate may The soldering described above is still carried out, although the work is cumbersome because there is a high risk of Joule heat being generated between the caulked parts of the legs of the contact studs.

The present invention aims to eliminate the above-mentioned drawbacks.

Figures 1 to 4 show a first embodiment of the present invention, in which a terminal plate 1 has a contact stud insertion hole 3 in the center of a slightly swollen seat 2 which has a spherical shape with a very gentle angle from the inner surface. A contact connecting part A is provided, a rotation stop part B is provided with an engaging tongue piece 4 protruding inwardly from an appropriate edge, and a rotation stopping part B is provided with an engaging tongue piece 4 protruding inwardly from an appropriate edge, and a rotation stopper B is provided, and stands upright outward from an appropriate edge at a position slightly away from the connecting part A. A main caulking piece 5' is provided with several protruding pieces 6 and recesses 7 between the protruding pieces 6 at the upper end, and a gap 9 is provided between the main caulking piece 5 for passing the core wire of the cord. A caulking part C constituted by a low-height sub-caulking piece 8 which is cut and raised upright from the terminal board 1 is provided in opposition to the recessed part 7 of the caulking piece 5.

In the terminal board 1 of this embodiment, a contact 13 having a rivet head is engaged with the surface of an insulator 11, and a contact connecting portion A is attached to a leg of a contact rivet 12 that is passed through a through hole provided in the insulator to the back surface.
pass through the insertion hole 3 with the bulge of the seat 2 facing outward, insert the retaining tongue piece 4 of the rotation stopper B into the rotation prevention hole (blind hole) 14 of the insulator 11, and insert the insertion hole of the contact stud 12 leg. The end surface protruding from 3 is spread out and caulked as shown in Figure 3.

Pass the core wire 16 exposed at the end of the twisted cord 15 through the gap 9 between the main caulking piece 5 and the secondary caulking piece 8 of the caulking part C of the terminal board 1, and bend the main caulking piece 5 as shown in Figs. Otherwise, the caulking pieces 5 and 8 are bent and the core wire 16 is strongly wound and caulked.

When the core wire 16 is thin, the sub-caulking piece 8 enters the recess 7 between the projecting pieces 6, 6 of the main caulking piece 5.

FIG. 5 shows a second embodiment, in which the bottom of the protruding piece 6 of the first embodiment is extended flat to form a contact connecting part A1 consisting of a seat 2a and an insertion hole 3a, and the other parts are This is the same as the first embodiment.

Therefore, the interval between the insertion holes 3 and 3a of A1 of the contact connecting part A is as follows:
The distance between the two contact studs that pass through the insulator to create electrical continuity is matched.

Since the terminal plate of this embodiment passes through two contact rivets, no rotation stopper is required.

As is clear from the description of the embodiments described above, the present invention has a leg that penetrates the insulator 11 of the switch, and on the back side of the insulator 11, the leg of the contact stud 12 is expanded and caulked. Insert the insertion holes 3, 3a provided in the terminal board 1 into the terminal plate 1, and press the caulking of the legs of the contact stud 12 to the slightly bulging seats 2, 2a on the edge of the hole of the reading card. The connecting portion A of the terminal plate 1 is pressed against the back surface of the insulator 11 by pressurizing the bulge of the seat 2゜2a as described above, and the contact stud 1
Even if there is some error in the caulking of the legs 2 and 2, since the seats 2 and 2a themselves have elasticity, the pressure welding of the connecting part A becomes elastic and maintains the installation, which prevents deterioration over time. Therefore, even if the thickness of the insulator 11 shrinks or some loosening occurs in the caulking of the contact studs 12, the crimping of the connection part A of the terminal board 1 to the back surface of the insulator 11 and the connection with the contact studs 12 will be permanent. There is no generation of Joule heat caused by loosening of the joint, and there is no risk of deformation even if the insulator 11 is a thermoplastic resin plate, making the service life of the switch longer than when the lead wires are soldered. Produces a unique effect.

Also, a cord 15 consisting of a main caulking piece 5 and a sub-caulking piece 8
The caulking portion C allows the core wire 16 of the cord 15 to be elastically wound and caulked even after the terminal board 1 is attached as described above, so that the power source or load cord can be attached to the contact stud 12 required after the switch is assembled. can be connected, and the assembly work including the terminal board 1 of the switch can be facilitated, and many benefits can be provided to the switch assembly and durability.

[Brief explanation of drawings]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view, FIG. 2 is a partially cutaway side view of the state in use, and FIG.
The figure is a plan view of the same, and FIG. 4 is a sectional view taken along line a-a in FIG. 3. FIG. 5 is a partially cutaway perspective view of the second embodiment. 1... Terminal board, 2, 2a... Seating, 3, 3a...
Insertion hole, 5...Main caulking piece, 8...Sub-caulking piece, 9
... Spacing, 11... Insulator, 12... Contact stud.

Claims (1)

[Scope of utility model registration request] an insertion hole in the terminal board that is inserted through the leg of the contact stud passed through the insulator on the back surface of the insulator;
A cord is attached between the contact connecting part A, which forms a slightly bulging seat provided at the edge of the hole of the reading card, and the main caulking piece that stands up from the edge slightly away from the connecting part A, and the main caulking piece. A caulking part C is provided, which consists of a sub caulking piece C, which is made upright by cutting and raising at intervals through which the core wires are passed, and is opposed to the main caulking piece. and the seat is crimped to the back surface of the insulator, and the cord core wire is sandwiched and fixed by bending the main caulking piece or the main caulking piece and the sub caulking piece of the caulking portion C. Terminal board device.