JPH03176918A - Operating switch with screwed terminal - Google Patents

Abstract

PURPOSE:To simplify wiring work and prevent the generation of a failure and an accident caused by short circuit at the time of providing terminal blocks collectively, by forming the terminal blocks into multiple stages in the upper and the lower so that a central stage thereof projects to the back direction, and exposing screwed parts only in the upper and the lower direction of the back. CONSTITUTION:Terminal blocks 8a-8c are separated from each other with barriers 7, and the terminal blocks 8a, 8b are separated into an upper stage, a central stage and a lower stage by projecting the terminal block in the central stage the back direction. The barriers 7 are formed only in the vertical direction of the terminal blocks 8a, 8b. With this structure, each terminal blocks 8a-8c is exposed in the vertical direction of the back, and wiring is performed to the upper stage and the lower stage of the terminal blocks 8a-8c so as to extend to the upper and the lower respectively, and thereafter, wiring to the central stage can be performed so as to extend to the upper and the lower. The wiring work can be thereby facilitated, and while the generation of a failure and an accident caused by short circuit in the case of fitting multiple operating switch collectively can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (AL Industrial Field of Application) This invention relates to an operation switch that is attached to a control panel and that switches a microswitch housed inside by operating an operation member such as a push button or lever provided on the front side. In particular, the present invention relates to an operation switch with a screw terminal for wiring to a microswitch using screws.

(b) Conventional Technology A small operation switch attached to a control panel has a single or multiple microswitches inside, and the microswitches are switched by operating a push button exposed on the front side of the control panel. Microswitches housed in operation switches generally have normally closed contacts (NC) and normally open contacts (N
It has three contacts: o), and a common contact (C), and three terminals are exposed so that wiring to each contact can be done by soldering. Therefore, in conventional operation switches, the three terminals of the microswitch are exposed from the back, and wiring is done by soldering to these terminals. However, the wiring by soldering inside the control panel is
Soldering was complicated as it required a power source for the device.

Therefore, as shown in FIGS. 5(A) and 5(B), terminal blocks 54 are individually isolated by barriers 57 on the back side of the housing 50.
．． 56, and wiring work was performed via screws 55 at each terminal block. Among these, the terminal block 56 is a terminal block for a lamp built into the housing 5o.

In order to configure such a screw terminal block in a small operation switch, a screw insertion hole is drilled at the tip.
By separately manufacturing a microswitch 51 equipped with a terminal 52 having a bent screw fixing portion 53 and storing this microswitch 51 in the housing 50, the housing 5
A terminal block 54 for a microswitch was formed having a screw fixing part 53 exposed on the back surface of the microswitch.

(C1 Problem to be Solved by the Invention) However, in the conventional operation switch with a screw terminal, as shown in FIG. 5(A), wiring extends in four directions from the terminal block on the back of the operation switch. ,
There was a problem that the screw fastening work was complicated. In addition, -i, in many cases, a plurality of operation switches are arranged horizontally, and in such a case, when the wiring 58 is extended horizontally, another operation switch located on the side of the switch is connected. It interferes with the wiring for the terminal block, making the wiring work even more complicated, and since the screw-fastening portion 53 is exposed laterally, there is a problem that it may cause failures or accidents due to short circuits, etc.

Furthermore, since a microswitch with a terminal having a screw terminal at its tip is used, there is a problem in that a dedicated microswitch must be prepared for the operation switch with a screw terminal, which complicates parts management. In addition, in the manufacturing process of microswitches, terminals with screw fixing parts are
Since the hoop material is molded straight, there is a problem in that the size of the hoop material increases and the manufacturing loss I. of the microswitch increases.

The first object of this invention is to allow the wiring to extend only in the vertical direction from the terminal block, thereby simplifying the wiring work and preventing interference with the wiring of other operation switches when the operation switches are assembled. A second object of the present invention is to provide an operation switch with screw terminals that can prevent malfunctions and accidents caused by short circuits. An object of the present invention is to provide an operation switch with a screw terminal that can simplify parts management and reduce costs by using the switch.

(d) Means for Solving the Problem The operation switch with a screw terminal according to the invention described in claim (1) includes a single or plural microswitches that can be switched by operating an operating member, and each terminal of the microswitch. A terminal block having a screw-fastening part to which is connected, the terminal block having three stages, top and bottom, with the center stage protruding toward the back, and the terminal block having the screw-fastening part exposed only in the back and top and bottom directions; The operation switch with a screw terminal according to the invention described in claim (2) is characterized in that, in the configuration described in claim (1), each terminal of the microswitch is formed into a flat plate shape, and The connecting fitting is characterized in that one end has a slit into which the terminal of the microswitch is press-fitted, and the other end has a screw insertion hole exposed to the terminal block.

te1 effect In the invention described in claim (1), the wiring connected to each terminal of the microswitch extends in the vertical direction on the back surface of the switch. In addition, among the terminal blocks configured in three upper and lower stages, the center stage protrudes more toward the back than the others.
Even if you wire to the center stage after wiring to the top or bottom terminal block, it will not interfere with the murder wiring. Therefore, all the wiring extends in the vertical direction, and even when a plurality of operation switches are arranged laterally, there is no interference with the wiring for the terminal blocks of other operation switches located laterally.

Furthermore, in the invention described in claim (2), a general microswitch having a flat terminal is used as the microswitch housed in the operation switch, and a connection having a slit into which the terminal of the microswitch is press-fitted is used. The terminals of the microswitch and the terminal block are connected through the metal fittings. Therefore, there is no need to separately manufacture a microswitch having a special terminal shape, and component management is facilitated.

(flEmbodiment FIG. 1 is an external perspective view of an operation switch with a screw terminal, which is an embodiment of the present invention, in the rear direction.
is constructed by fitting the shaft portion 4 of the operating portion 3 into the main body 2. A male threaded portion (not shown) is formed on the shaft portion 4 of the operating portion 3, and a set screw 5 is screwed into the male threaded portion. The operating section 3 is fitted into a mounting hole formed in a control panel (not shown) from the front of the control panel, and is fixed by sandwiching a panel constituting the control panel between the mounting surface 3a and the setscrews 5. Inside the main body 2, two microswitches are housed along with a lamp (not shown). Terminal blocks 8a to 8c are formed on the back surface of the main body 2, and a cover 6 having a barrier 7 is fitted onto the main body 2 from the back surface. The terminal blocks 8a to 8C are separated from each other by the barrier 7 that the cover 6 has, and each of the terminal blocks 8a to 8c is also separated into an upper stage, a middle stage, and a lower stage. The terminal blocks 3a and 3b are both connected to the terminals of the microswitch, and the terminal block 8c is connected to a terminal inside the main body 2 that contacts the lamp. The microswitch housed in the main body 2 is the operating part 3.
It is a microswitch that has three contacts, NC, No, and C, which can be switched by operating an operating member such as an operating button or lever (not shown) provided inside, and the terminals of each contact are located on the upper and middle stages of terminal blocks 8a and 8b and the lower tier, respectively. In the terminal blocks 8a and 8b, the middle stage protrudes more toward the rear than the upper and lower stages. Note that since two terminals are sufficient as power supply terminals for the lamp, the middle stage is omitted in the terminal block 8c. Each terminal block 8a-8
The connection fitting 11 is exposed at c.
A screw 9 is screwed into the screw 1 through a stopper 10.

FIGS. 2 and 3M are a bottom sectional view and a side sectional view, respectively, of the main body forming a part of the operation switch.

A lamp holder 28 is attached to the operating section 3 side inside the main body 2, which is formed into a hollow shape by resin molding. The lamp holder 28 is formed by pressing a conductive metal flat plate into a cylindrical shape, and accommodates a lamp (not shown) inside. A coil spring 29 is provided on the inner bottom surface of the lamp holder 28. The lamp holder 28 and the spring 29 are connected to the aforementioned terminal block 8C via a contact fitting (not shown). Further, a boulder 24 is attached to the main body 2 from the back side. This boulder 24 accommodates two microswitches 21. Terminals 238 to 23C protruding from the back surface of the microswitch 21 are press-fitted into slots lla formed at one end of the connection fitting 11.

The other end of this connection fitting 11 is exposed to the terminal blocks 8a and 8b.

The connecting fitting 11 is held by the lamp 22.

A screw fitting 26 is fitted into the lamp 22 from the rear side, and the other end of the connecting fitting 11 is located outside of the screw fitting 26. The screw 9 is fitted into the fitting hole 11b formed at the other end of the connecting fitting 11 via the stopper fitting 10, and further screwed into the threaded fitting 26. In this way, attach the screw fitting 2 to the back of the lamp 22.
6 and the connection fittings 11 constitute terminal blocks 8a to 8C.

In this terminal block, wiring is performed by sandwiching a fork terminal or a twill wire between the connection fitting 11 and the stopper fitting 10.

Three terminals 238 to 23 that the microswitch 21 has
C terminal 23 facing the upper and lower tiers of the terminal block
a and the NC terminal 23C are cut in accordance with the amount of protrusion of the terminal block toward the rear surface. This cut terminal 23
Similarly to the center stage terminal 23b, the terminals a and 23C are press-fitted into the slit 11a formed at one end of the connection fitting 11. Therefore, as the microswitch 21, a general plate-shaped microswitch equipped with terminals for soldering can be used, and the three terminals are assembled as post-processing of the microswitch 21 before assembling the operation switch l. Two of them will be severed.

FIG. 4(A) is a rear view of the operation switch. Moreover, the same figure (B) is a schematic diagram of the arrow sectional view of the arrow XX direction in the same figure (A).

As explained in FIG. 1, the terminal blocks 8a to 8c are separated from each other by the barrier 7, and the terminal blocks 8a, 8
In each case b, the middle terminal block protrudes toward the rear surface, so that the upper, middle, and lower terminal blocks are separated from each other. Further, the barrier 7 is formed only in the vertical direction on the terminal blocks 8a and 8b. From the above,
Each terminal block is exposed only in the back direction and the top and bottom directions. As a result, as shown in FIG. 4(A), the terminal blocks 8a~
After wiring is applied to the upper and lower stages of 8c so as to extend upward and downward, respectively, wiring for the middle stage can be performed so as to extend upward or downward. In this way, the wiring can only extend in two directions, upward and downward, so even when other operation switches are installed in a horizontally concentrated manner, there is no possibility of interference with the wiring for the terminal blocks of other operation switches. This prevents malfunctions and accidents from occurring due to short circuits.

In addition, although wiring is generally performed by short-circuiting and connecting the C terminals of multiple microswitches, in the operation switch of the above embodiment, the terminal blocks corresponding to two microswitches are configured to be adjacent to each other. Therefore, the above-mentioned wiring process can be easily performed.

In this embodiment, a microswitch having three contacts, NC, NO, and C, was explained. However, using the same cover 6 and runzer 22, etc.
Even when storing a micro switch with only two contacts,
The invention can be similarly implemented.

(Effect of the g1 invention) According to the invention described in claim (1), wiring can be done so as to extend only in the vertical direction with respect to the terminal block, and wiring work can be easily performed, and multiple Even when multiple operation switches are installed together, the wiring for the terminal blocks of adjacent operation switches will not interfere with each other, making wiring work easier and preventing failures due to short circuits. This has the advantage of being able to prevent accidents from occurring.

According to the invention described in claim (2), it is possible to use a general plate-shaped soldering terminal as a microswitch to be housed in an operation switch, and a terminal having a screw-fastening member can be used. There is no need to prepare a separate microswitch, which simplifies parts management and reduces costs.

They are a rear view and a side view of Sui Nochi, respectively.

1-operation switch, 8a-8C one terminal block, 11-connection fittings, 1la-slit, 11b-fitting hole, 21-micro switch, 23 one terminal.

Claims (2)

[Claims] (1) A terminal block with a single or multiple microswitches that can be switched by operating an operating member, and a screw-fastened part to which each terminal of the microswitch is connected, with three upper and lower stages with the center stage protruding toward the back. An operation switch with a screw terminal, comprising: a terminal block having a screw terminal exposed only in the rear direction and the vertical direction; (2) Each terminal of the microswitch is formed into a flat plate shape, and a connection fitting is provided at one end with a slit into which the terminal of the microswitch is press-fitted, and at the other end with a screw insertion hole exposed to the terminal block. An operation switch with a screw terminal according to claim (1).