JPS6125141Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a switch device used for, for example, leakage or disconnection.

Generally, a test switch device is attached to an earth leakage or disconnection switch, and first, a conventional switch device of this type will be explained with reference to FIGS. 1 to 3.

The switch button 1 has a leg portion 2 made of a substantially Z-shaped rod, and a return spring 3 made of a coil spring is wound around the leg portion 2. The switch button 1 is inserted into a hole 5 formed in a cover 4 for leakage and disconnection. Note that the leg portion 2 is bent when the switch button 1 is bent, which is determined by electrical leakage and the external configuration of the disconnector.
This is to absorb the deviation between the position of the switch 50 and the mounting position of the switch 50, which is determined by electrical leakage and the internal configuration of the disconnector.

Next, in order to insert the switch button into the hole 5 of the cover 4, as shown in FIG.
The arcuate protrusions 9 and 10 on the periphery of the hole 5 and the radial grooves 7 and 8 that partition them are utilized. That is, the third
As shown in FIG.
When the switch button 1 is released when it reaches the radial groove 8, the switch button 1 is inserted into the cover 4 by the action of the return spring 3.

Note that although FIG. 1 shows the switch 50 being activated by pressing the switch button 1 by hand, the switch button 1 does not press the lever 51 of the switch 50 even when it is pushed in to the maximum extent. In order to prevent the leg 2 of the switch button 1 from being rotated in the direction of the radial groove 7.
and the protrusion 10 of the cover 4 are arranged so that there is an overlapping part of Z in the vertical direction even if the leg 2 is lowered to the maximum extent.

In the conventional switch device configured as described above, when connecting the lead wire to the resistor attached to the switch 50, the lead wire is fixed to the linearly extending leg of the resistor by soldering or the like. It was being done.

By the way, in this case, the lead wire must be fixed to the free end of the leg, so
Workability is poor, and when the contact area between the legs and the lead wires is increased and the two have to be entangled and fixed, the workability becomes even worse.

The purpose of this invention is to eliminate the above-mentioned problems and to provide a switch device that improves the workability of lead wires connected to circuit components such as resistors.

In order to achieve the above object, this invention attaches the leg at one end of the circuit component to one of the leaf springs, and forms the leg at the other end of the circuit component into a U-shape. The leg portion is elastically inserted into an elongated hole provided in the switch case, and a lead wire is connected to the portion of the leg portion at the other end that protrudes from the elongated hole.

The present invention will be explained below with reference to embodiments shown in FIGS. 4 to 16.

As shown in FIG. 4A, a switch button 1 made of a molded insulator is provided with a leg portion 2 made of a substantially Z-shaped rod, and a return spring 3 made of a coil spring is attached to this leg portion 2. It is wrapped. On the other hand, the cover 4 into which the switch button 1 is inserted is made of a molded insulator, and has a large diameter hole 5 into which the switch button 1 is inserted, as shown in FIGS. Further, a small-diameter hole 6, which communicates with the large-diameter hole 5 and into which the leg portion 2 of the switch button 1 is inserted, is connected to the cover 4 concentrically with the hole 5;
The circumferential edge of this small diameter hole 6 consists of arcuate protrusions 9, 10 of different heights, and these protrusions 9, 10 are separated by radial grooves 7, 8. Note that a slope 11 is formed on the lower surface 15 of the protrusion 10 on the groove 8 side.

The dimensions of the switch button 1 and the cover 4 are selected as follows. That is, when the leg portion 2 of the switch button 1 is inserted into the groove 7 and pushed in as far as it will go, the lower surface 12 of the switch button 1 will fit into the hole 5.
However, at this time, the shoulder 14 of the leg 2
faces the lower surface 15 of the protrusion 10 with a gap therebetween, and overlaps with the lower surface 16 of the protrusion 9 in the vertical direction.

In order to insert the switch button 1 into the cover 4, insert the leg part 2 of the switch button 1 into the groove 7 and push it in as much as possible, then turn the switch button 1 counterclockwise as shown in Fig. 4C. switch button 1 when the shoulder 14 of the leg 2 aligns with the groove 8.
Let go of your hand. Then, the switch button 1 is urged upward by the action of the return spring 3 and is inserted into the cover 4.

On the other hand, the switch that the leg portion 2 comes into contact with is the fifth switch.
The configuration is shown in the figure. That is, a V-shaped opening 18 is formed at one end of the leaf spring 17 made of a good conductor, and a circular groove 19 for connecting a lead wire is bored inside this opening 18. A protrusion 20 is formed in the middle part of the leaf spring 17 which is bent with respect to one end provided with the circular hole 19. Therefore, this leaf spring 17 is used as a terminal. Next, a leaf spring 21, which is a terminal paired with this leaf spring 17, is made of a good conductor and has an L-shape, and is provided with a tongue piece 22 cut out at one end. A circular hole 23 for connecting a lead wire is bored.

The leaf springs 17, 21 are housed in a switch case 24 made of a molded insulator. This switch case 24 has a recess 25,
This recess 25 is formed along both side walls 26 and 27. The end of the switch case 24 opposite to the recess 25 is used as a mounting part for a resistor 29, which is a circuit component, and a long hole 28 is bored in the lower end thereof. The resistor 29 has a pair of legs 30 and 31 at both ends, of which the lower leg 31 is formed into a U-shape. In addition, in FIG. 5, the reference numeral 37 is a mounting plate for the switch case 24.

The aforementioned leaf springs 17, 21 and resistor 29
is installed in the switch case 24 as shown in FIGS. 6 to 11.

That is, the leaf spring 21 is held in place by its tongue 22 engaging with a step 32 provided on the switch case 24. Further, the leaf spring 17 is held in place by having its protrusion 20 engaged with a stepped part 33 provided on the switch case 24, and the flat parts 34 and 35 of both leaf springs 21 and 17 are opposed to each other. It looks like this (Figure 6). Further, the width H of the U-shape of the leg portion 31 of the resistor 29 is determined by the length of the long hole 28 of the switch case 24, as shown in FIG.
This elongated hole 28
The leg portion 31 is press-fitted into the switch case 24 to attach it to the switch case 24. Note that the leg portion 31 protrudes below the elongated hole 28, and a lead wire 38 is connected in the space 36 thereof. On the other hand, the other leg portion 30 of the resistor 29 is connected to the leaf spring 1 as shown in FIG.
7, and its tip is inserted through a circular hole 19 and fixed to the switch case 24.
(FIG. 10) Next, the related structure between the switch button 1 and the switch case 24 will be explained. When the switch button 1 is pressed by hand, the leaf spring 17 is bent into a cantilever shape using the protrusion 39 in the switch case 24 as a fulcrum, as shown in FIG. However,
The elastic force of the bent leaf spring 17 against the leg 2 of the switch button 1 is at least equal to the shoulder 14 of the leg 2.
The tip of the leg 2 acts to press the tip of the leg 2 toward the protrusion 9 until it overlaps with the protrusion 10 . In addition, the leg 2
until the shoulder 14 of the leg 2 overlaps the protrusion 10.
The tip faces into the recess 25 of the switch case 24. Furthermore, as shown in FIG. 11, even if the leg part 2 of the switch button 1 is rotated to the position X where it abuts the side wall 26 of the switch case 24 and the hand is released from the switch button 1, the shoulder part of the leg part 2 14 is located within the slope 11 formed on the protrusion 10, and is adapted to rotate counterclockwise in FIG. 11 along the slope 11 by the action of the return spring 3.

Next, the balance of forces in the free state of the switch button 1 will be explained with reference to FIG. Due to the action of the return spring 3, the switch button 1 tends to swing in the direction of the arrow as shown in FIG. 7B. However, since the elastic force of the leaf spring 17 acts to swing the switch button 1 in the direction opposite to the arrow, the switch button 1 is maintained in a substantially horizontal position.

FIG. 12 shows another embodiment of the attachment of the resistor 29 to the leaf spring 17, in which the opening 18 of the leaf spring 17 is formed into a U-shape, and the end of the leaf spring 17 is formed when the leaf spring 17 is not restrained. As shown by the dashed line in Figure 12 (b), the part should be oriented slightly upward. Thus, the leg portion 30 of the resistor 29 whose lower end is supported may be fitted into the opening 18, and the leg portion 30 may be bent and fixed so that the end portion of the leaf spring 17 is in a horizontal state. Note that the leg portions 30 may be bent in advance.

Next, the structure of the switch button 1 and the cover 4 may be as shown in FIG. That is, the lower surface 16 of the protrusion 9 is made to be substantially the same horizontal plane as the lower surface of the protrusion 10, and slopes 11 and 11a are provided on the groove 8 side of the protrusion 9 and 10, respectively. According to such a configuration, the recess 25 of the switch case 24
Even if the leg 2 of the switch button 1 facing inward rotates so as to come into contact with the side walls 26, 27 of the switch case 24, the shoulder 14 of the leg 2 will not touch the slope 11 or 11a.
Since the switch button 1 is in contact with the cover 4, the switch button 1 will not come off the cover 4. Note that, contrary to this example, the first
As shown in FIG. 4, even if slopes 11b and 11c are formed on both sides of the shoulder 14 of the leg portion 2, the effect remains the same. Further, the embodiments shown in FIGS. 11, 13, and 14 may be combined, and each slope 11, 1
1a, 11b, and 11c may be not only flat but also curved.

FIG. 15 shows still another example, in which the leg portion 2 of the switch button 1 is L-shaped and faces into the switch case 24 from a recess 25 formed in a side wall 27 of the switch case 24. It is something.

FIG. 16 also shows another example, in which the leaf spring 1
7 springs the leg portion 2 of the switch button 1, so that the leg portion 2 moves in the direction of the groove 8 and is held within the groove 8. According to such a configuration, it becomes easier to maintain the switch button 1 in the free state in a horizontal state.

In each of the embodiments described above, when the switch button 1 is pressed manually to lower the leg 2, the leaf spring 17 comes into contact with the leaf spring 21, and the electric circuit including the resistor 29 becomes conductive.

As mentioned above, in the switch device according to the present invention, one end of the circuit component is formed into a U-shape and inserted into a long hole bored in the switch case, and the lead wire is connected at the part protruding from the long hole. So,
When connecting the lead wire to the circuit component, the legs of the circuit component are temporarily fixed in elastic contact with the elongated hole, so that the connection work is simplified and the workability is improved. Another advantage is that the contact area between the circuit components and the lead wires can be increased with a simple operation, and a highly reliable connection state can be obtained.

[Brief explanation of the drawing]

1 to 3 show a conventional switch device, in which FIG. 1 is a vertical cross-sectional side view showing the operating state, FIG. 2 is a vertical cross-sectional side view showing the free state, and FIG. Figure A is a plan view showing the inserted state of the switch button, Figure 3B is a sectional view taken along line A-A in Figure 3A, and Figures 4 to 11 are a first embodiment of the switch device according to the present invention. 4A is a perspective view of the switch button, FIG. 4B is a perspective view of the cover, FIG. 4C is a plan view of the cover, and FIG. 5 is a perspective view of the switch in an exploded state. FIG. 6A is a bottom view of the protrusion, FIG. A is a diagram similar to FIG. 6B showing the switch button in a free state, FIG. 7B is a vertical cross-sectional explanatory diagram showing the influence of the leaf spring in FIG. Partial longitudinal sectional view showing the state before the device is attached to the switch case, No. 8
Figure B is a diagram similar to Figure 8 A showing the state after installation;
Figure 9A is a vertical cross-sectional explanatory diagram showing the relationship between the leaf spring and the resistor, Figure 9B is a perspective view showing the main parts of Figure 9A, and Figure 10A is the attachment of the resistor to the leaf spring. 10B is a perspective view showing the main part of FIG. 10A, FIG. 11A is a plan view showing the relationship between the leg of the switch button and the leaf spring, and FIG. 11A is a side view of the main part of FIG. 11A, FIG. 12 shows another example of attaching a resistor to a leaf spring, FIG. 12A is a plan view, and FIG. 12B is a side view. , FIG. 13 is a side view showing another example of the cover, FIG. 14 is a side view showing another example of the leg of the switch button, FIG. 15 is a perspective view showing another example of the switch case, and FIG. 16 is a side view showing another example of the switch case. The figure is a vertical cross-sectional side view showing another example of the leg portion of the switch button and the cover. In addition, the same reference numerals in the drawings indicate the same or equivalent parts, and the reference numeral 1 in the drawings is the switch button, 2 is the leg of the switch button, 4 is the cover, 5 is the large diameter hole, 6 is the small diameter hole, and 7 and 8 are the small diameter holes. groove, 9 and 10 are protrusions, 17 is a leaf spring, 21 is a leaf spring, 24 is a switch case, 25
is a recess, 28 is a long hole, 29 is a resistor, 30, 31
is a leg, 38 is a lead wire, 50 is a switch, 51
is a lever.

Claims (1)

[Scope of utility model registration request] A switch device comprising a cover for mounting a switch button, and a switch case for mounting a terminal consisting of a pair of leaf springs that are opened and closed by raising and lowering the legs of the switch button. While attaching it to one leaf spring, the leg at the other end of the circuit component is formed into a U-shape, and the U-shaped leg is elastically inserted into a long hole provided in the switch case. A switch device characterized in that a lead wire is connected to a leg portion at the other end protruding from the elongated hole.