JP3883306B2 - Expansion coupler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This application relates to a coupler that is formed integrally with a switch case and that can be provided with additional terminals.
[0002]
[Prior art]
A switch case-integrated coupler that includes a coupler terminal protruding from a switch case and a coupling wall that substantially surrounds the coupler terminal is known.
[0003]
[Problems to be solved by the invention]
By the way, in the coupler formed integrally with the switch case as in the above conventional example, since the coupler terminal protrudes from the switch case, if an attempt is made to add the coupler terminal into the coupler, the additional terminal is also switched. Although it must be put in the case, it is difficult to add a coupler terminal that is separate from such a switch case. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an add-on coupler capable of freely adding terminals.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, an additional coupler according to the present invention is a coupler provided with a coupler terminal protruding from a switch case and a coupling wall formed integrally with the switch case so as to surround the coupler terminal in a substantially cylindrical shape. An expansion space that does not have a coupler terminal is provided in the space surrounded by the coupling wall , and a separate expansion member consisting of the expansion terminal and the expansion base that holds the expansion terminal is detachably fitted into the expansion space. In addition, a lead-out portion of the cord connected to the extension terminal is provided on the coupling wall ,
The bottom part of the switch case is a step formed by a lower step part in which the coupler terminal is integrally provided in advance and an upper step part surrounding the upper part of the expansion space at a higher position when the protruding direction of the coupler terminal is downward. Shape
When the extension member is attached, the extension base is positioned so as to be the same height as the lower stage part, and a space for projecting the connection part of the extension terminal connected to the cord is provided between the extension base and the upper stage part. It is characterized by securing .
[0005]
【The invention's effect】
If an additional member configured separately is fitted into an additional space in the coupling wall and detachably attached by engagement, the terminals can be easily added. Moreover, since the lead-out portion of the cord connected to the extension terminal is provided on the coupling wall, even if the coupler is formed integrally with the switch case, it is possible to easily add a coupler terminal of a circuit unrelated to the switch case. it can.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment will be described with reference to FIGS. 1 is a cross-sectional view of the switch case according to the embodiment (cross-sectional view taken along line 1-1 of FIG. 2), FIG. 2 is a bottom view thereof, FIG. 3 is a mounting state diagram of an additional member, and FIG. It is line sectional drawing. In this embodiment, the side on which the coupler is provided is the bottom side of the switch case.
[0007]
In these drawings, the switch case 1 includes a switch mechanism portion 2, and the bottom portion 3 has a stepped shape. The upper step portion 4 is located one step higher below the switch mechanism portion 2, and the side of the switch mechanism portion 2. And a lower step portion 5 that is lowered by one step.
[0008]
The lower stage 5 is integrated with a plurality of coupler terminals 6 protruding downward. The other end of each coupler terminal 6 is connected to one end of the circuit unit of the switch mechanism unit 2. A coupling wall 7 surrounding these coupler terminals 6 in a substantially cylindrical shape protrudes downward from the bottom 3 and is integrally formed.
[0009]
However, the coupling wall 7 surrounds the lower part of the upper stage 4 where the coupler terminal 6 is not provided, and the space below the upper stage 4 surrounded by the coupling wall 7 is an additional space 8.
[0010]
An expansion member 10 is accommodated in the expansion space 8. The extension member 10 includes a plurality of extension terminals 11 and an extension base 12 that supports the extension terminals 11 integrally. The extension base 12 is supported on the inner side of the coupling wall 7 at the same height as the lower portion 5, and the extension terminals 11. The tip of each has the same height as each tip of the coupler terminal 6.
[0011]
The extension base 12 has a substantially quadrilateral shape, and a pair of claws 13 are formed at opposing positions on the long side, and engages with an engagement hole (not shown) formed in the side wall of the coupling wall 7. ing.
[0012]
A claw 14 is also formed on the short side of the coupling wall 7 at the center side, and engages with an engagement hole 16 formed in the standing wall 15 connecting the upper step 4 and the lower step 5. is doing. A guide portion 17 is formed on the remaining short side portion, and is fitted into a vertical slit 18 formed in the coupling wall 7.
[0013]
The extension base 12 is positioned at the push-in position toward the upper stage 4 by a shelf 19 (FIG. 3) provided at the corner in the coupling wall 7, and the extension terminal 11 is interposed between the extension base 12 and the upper stage 4. The space from which the connecting portion 20 protrudes is secured.
[0014]
The connecting portion 20 is connected to one end portion of the cord 21 in this space, and the cord 21 is led out from the slit 18 to the outside.
[0015]
FIG. 2 shows the coupling wall 7 and its internal structure as seen from the bottom side of the switch case 1, and a standard part 22 where the coupler terminal 6 is provided from the beginning, and an additional space where the coupler terminal 6 is not initially provided. It can be seen that 8 is provided separately on the left and right of the figure.
[0016]
In addition, the virtual line in the extension space 8 shows the attachment state of the extension member 10, and the code | symbol 23 is the guide groove of the nail | claw 13, and is formed in the up-down direction in the side wall surface of the coupling wall 7 (refer FIG. 1).
[0017]
FIG. 3 is a view showing the expansion member 10 mounted in the expansion space 8 from below the switch case 1, and the expansion member 10 is fitted into the expansion space 8 of the coupling wall 7 indicated by a virtual line.
[0018]
Next, the operation of this embodiment will be described. First, the coupler 25 is a standard coupler 25 constituted by the bottom 3 of the switch case 1, the coupling wall, and the coupler terminal 6. When the extension member 10 is attached thereto, the coupler 25 is in an expanded state.
[0019]
That is, after the core wire of the cord 21 is connected to the connecting portion 20 in advance by soldering or the like, the cord 21 is put into the slit 18, and then the guide portion 17 is put into the slit 18 and the claw 14 is put into the guide groove 23. Then, the additional member 10 is pushed into the coupling wall 7 toward the upper stage 4.
[0020]
Eventually, when the extension base 12 reaches the same height as the lower step portion 5, it is positioned by the shelf portion 19, and the claw 13 is engaged with the engagement hole 16 formed in the side wall of the coupling wall 7, thereby integrating the engagement The extension terminal 11 becomes a terminal of the coupler 25.
[0021]
In this manner, the extension space 8 is provided in the coupling wall 7 and a separate extension member 10 is detachably attached thereto, whereby the extension terminal 11 can be easily added. Even if the coupler 25 is integrated with the switch case 1, the extension terminal 11 does not have to be taken out from the inside of the switch case 1, so that it is possible to add a coupler terminal of a circuit unrelated to the switch case 1. It is possible to increase the degree of freedom.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a switch case according to an embodiment (cross-sectional view taken along line 1-1 of FIG. 2).
FIG. 2 is a bottom view thereof. FIG. 3 is a mounting state diagram of an additional member. FIG. 4 is a sectional view taken along line 4-4 of FIG.
[Explanation of symbols]
1: switch case, 3: bottom, 4: upper stage, 5: lower stage, 6: coupler terminal, 7: coupling wall, 8: additional space, 10: additional member, 11: additional terminal, 12: additional base, 13 : Nail, 14: Nail

Claims (2)

In a coupler provided with a coupler terminal protruding from the switch case and a coupling wall formed integrally with the switch case so as to surround the coupler terminal in a substantially cylindrical shape, the coupler terminal is not provided in the space surrounded by the coupling wall An extension space is provided, and a separate extension member consisting of an extension terminal and an extension base for holding the extension terminal is detachably fitted in the extension space, and the lead-out portion of the cord connected to the extension terminal is connected to the connecting wall. Provided in
The bottom part of the switch case is a step formed by a lower step part in which the coupler terminal is integrally provided in advance and an upper step part surrounding the upper part of the expansion space at a higher position when the protruding direction of the coupler terminal is downward. Shape
When the extension member is attached, the extension base is positioned so as to be the same height as the lower stage part, and a space for projecting the connection part of the extension terminal connected to the cord is provided between the extension base and the upper stage part. An expansion type coupler characterized by securing . 2. The coupling wall includes a slit for fitting and attaching the additional member, and the lead-out portion of the cord is a portion between the upper portion and the additional base in the slit. Expansion coupler.

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