JPS5850580Y2 - Terminal device for insulation box switch - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a terminal device for an insulating box switch, and is particularly intended to provide an economical terminal device that is capable of back-side connection and front-side connection, and has high contact reliability.

Conventionally, the end hole device of an insulating box switch has a terminal mounting hardware that has a regular hexagonal head, a cylindrical body extending downward from the head, and a slotted hole in the center, and is installed on the terminal shelf of the insulating box. The terminal conductor forming a part of the main electric circuit and the crimp terminal of the electric wire are placed on top of each other and tightened with screws.

However, conventional terminal devices for insulated box switches are expensive because the terminal mounting hardware is special and manufactured by sawing. Also, when connecting electric wires to the terminal conductor, external force acts on the terminal mounting hardware and the terminal There were drawbacks such as lifting the mounting hardware and damaging the insulation box.

Therefore, the object of this invention is to eliminate the above-mentioned drawbacks and to provide an economical terminal device that ensures rotation and removal prevention.

Other objects and features of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 shows an embodiment of a switch equipped with the terminal device of this invention and a stud terminal attached thereto.The insulating box switch 1 is made of an insulating material and has a built-in well-known switching contact mechanism. It consists of a mold cover 2 and a mold base 3, and an operation knob 4 that penetrates through the mold cover 2 and projects is provided.

A horizontal terminal shelf 5 is provided at both ends of the mold base 30, and as shown in detail in FIGS. 2 to 4, the terminal shelf 5 has a through hole 6 and a rectangular counterbore hole 7 substantially coaxial. Terminal conductive plate insertion holes 8 and 8' are formed continuously, and further extend on both sides of the diameter of the through hole 6.

As can be clearly understood from FIG. 2, the rectangular, highly conductive terminal mounting metal piece 9 is provided with a screw hole 10 in the center.

The L-shaped terminal conductive plate 11 forming a part of the main electrical circuit led by the switching contact has a round hole 12 at a position corresponding to the perforation hole 10 of the terminal mounting metal piece 9. Insertion projection legs 13 and 13' are formed by cutting and bending a portion of the thin terminal conductive plate 11 at right angles to correspond to the terminal conductive plate insertion holes 8 and 8' of the terminal shelf 5.

As shown in FIGS. 5 and 6, the terminal mounting metal piece 9 is fitted into the counterbore hole 7 of the terminal shelf 5 and is supported so as not to rotate. 11 protruding legs 13.13' into the terminal conductive plate insertion holes 8, 8.
', and overlap the terminal mounting metal piece 9 and the terminal conductive plate 11, and as shown in FIGS. 1 and 7, attach the protruding legs 13.
The tip of 13' is bent on the back side of the terminal shelf 5 and crimped to the terminal shelf 5.

In the terminal device of this invention constructed as described above, as shown in FIG. By inserting the stud 14 through the hole 12 and tightening the stud 14 and the terminal conductive plate 11 with the nut 15, the stud terminal can be connected to the back surface.

Further, 16 is a mounting plate, and 17 is an external connection conductor.

Furthermore, as shown in FIG. 7, the crimp terminal 19 attached to the external electric wire 18 is stacked on the terminal conductive plate 11, and the screw hole 10 of the terminal mounting metal piece 9 is inserted from the top of the crimp terminal 19 using the tightening screw 20.
A surface connection can be made by fastening them together.

In this invention, as described above, a through hole 6 and a counterbore hole 7 are continuously formed on the same axis on a terminal shelf 5 provided horizontally at the end of an insulating box, and terminals are provided on both sides of the through hole 6. Conductive plate insertion hole 8
. A pair of projections 13.13 bent at right angles
' is inserted into the terminal conductive plate insertion holes 8, 8' and the tip is caulked to the terminal shelf 5 to fix the terminal conductive plate 11. Therefore, the terminal mounting metal piece 9 is prevented from rotating by the counterbore hole 7. The opening side is held down by the terminal conductive plate 11, and the terminal conductive plate 11 is firmly fixed to the terminal shelf 5 by caulking, ensuring that it does not rotate or pull out, and is protected against external force when connecting the wire. It is possible to obtain a terminal device that is free from deformation or breakage even when exposed to contact, and has reliable contact and is capable of back-side connection as well as front-side connection.

In addition, the terminal mounting metal piece 9 does not need to be embedded in the insulating box and can be simply fitted during assembly.Compared to conventional special-shaped turned pieces, it can be manufactured easily by press processing rather than material, making it less expensive, and the surface When the purpose is only for connection, an inexpensive material such as a steel plate may be used instead of a highly conductive material.

Furthermore, since the terminal conductive plate 11 does not require a punched hole, it has various economical effects such as being able to select a thin plate regardless of the thickness of the terminal tightening screw.

[Brief explanation of drawings]

FIG. 1 is a partial side sectional view of an insulating box switch equipped with a terminal device according to this invention, showing a state equipped with a stud terminal.
Figure 2 is an exploded perspective view showing the main parts of this invention, Figures 3 and 4 are a plan view and side sectional view of the main parts showing the mounting holes of the terminal shelf, and Figures 5 and 6 are the terminal device. A plan view and a side sectional view of the main part showing the assembly process, and FIG. 7 is a side sectional view of the main part including a terminal device, showing the state in which surface connection is performed. In the diagram, 1... Switch, 5... Terminal shelf,
6...Through hole, 7...Counterbore hole, 8,
8'...Terminal conductive plate insertion hole, 9...Terminal mounting metal piece, 10...Screw hole, 11...
...Terminal conductive plate, 13.13'...Protrusion, 14
...Stud, 16...Mounting plate, 17
...External connection conductor, 19...Crimp terminal.

Claims (1)

[Scope of utility model registration request] 1. A terminal shelf installed horizontally at the end of the insulation box has a through hole and a counterbore hole continuously formed on the same axis, and a terminal conductive plate insertion hole is provided around the through hole. A terminal mounting metal piece with a screw hole is fitted into the dust hole so as not to rotate, and a pair of protruding legs bent at right angles of the terminal conductive plate are inserted from the opening side so as to overlap and confine the terminal mounting metal piece. A terminal device for an insulating box switch, characterized in that the terminal conductive plate is fixed by being inserted into the terminal conductive plate insertion hole and caulking the tip to the terminal shelf. 2. The terminal device for an insulated box switch as claimed in claim 1, wherein the terminal mounting metal piece is a member pressed from a plate material. 3. The terminal device for an insulating box switch according to claim 1 or 2, wherein the terminal mounting metal piece is made of a steel plate.