JPH0228575Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention relates to a push button switch that is mainly used for switching on and off the power supply current of television receivers, audio equipment, etc., and is particularly suitable for combination with variable resistors, etc. It is something.

BACKGROUND TECHNOLOGY As shown in FIG. 4, a conventional push button switch has fixed contacts 3 and 3' connected to terminals 2 and 2' fixed to a case 1, respectively, fixed to the inner wall of the case 1. The insulating actuator 7, which is engaged and housed in the case so as to be able to move up and down in the direction of the opening, holds a movable shorting piece 5 that short-circuits and opens the fixed contacts 3 and 3'. A pair of elliptical inversion springs 9 are provided between the wall 7' and the engagement groove 8a of the operating shaft 8.
9' is rotatably bridged, and the operating shaft 8 is connected to the contact point 3,
When pushed in the direction 3', the reversing springs 9, 9' are reversed upward in a figure eight shape, the actuator 7 is moved downward, the fixed contacts 3, 3' are opened, and the operating shaft 8 is When pulled in the opposite direction, the reversing springs 9, 9' are reversed downward in an inverted V shape, the actuator 7 moves upward, and the fixed contacts 3, 3' are closed by the movable contact 5. It is becoming.

Problems to be Solved by the Invention However, in order to assemble the conventional push button switch mentioned above, first the external terminals 2, 2' and the fixed contacts 3,
3' are respectively connected and fixed across the upper wall of the case 1, and the actuator 7 holds the shorting piece 5,
The actuator assembly 10 is formed by rotatably attaching the reversing springs 9, 9' to the hanging wall 7', and then this is fitted into the case 1 to form the switch part assembly A shown in FIG. On the other hand, the operating shaft 8 is slidably held on the mounting plate 13 of the operating section assembly B formed separately, and the reversing springs 9, 9 of the switch section A are inserted into the engagement grooves 8a of the operating shaft 8. ', and at the same time press the mounting plate 13 in the direction of the case 1 to engage the engaging parts 14, 14' with the case 1, and swage the operation part assembly B to the switch part assembly. The reversing springs 9 and 9' are fixed to the solid body A to complete the assembly, but at this time, since the reversing springs 9 and 9' are in a rotatable state in the actuator 7 and are easy to move, it is difficult to engage them with the engagement groove 8a of the operating shaft 8 during assembly. It is not easy to assemble, resulting in poor work efficiency and the drawbacks are that it requires a skilled person to assemble.

Means for solving the problem In order to solve the above problems, the present invention
As shown in the figure and FIG. 2, a pair of chevron-shaped guide parts 143 for positioning the reversing springs 9, 9' are provided in the center hole of the mounting plate 13, and the switch part assembly A' is made by fixing the mounting plate to the switch in advance. In this figure, the operating unit assembly is obtained by removing the mounting plate 13 from the conventional operating unit assembly B.
The operation shaft 8 of B' is attached, and the tip of the operation shaft has a tapered circumference.

Function In the present invention configured as described above, when the operating shaft 8 is attached to the switch part assembly A' during assembly, the reversing springs 9 and 9' are compressed and form an inverted V-shaped chevron guide on the mounting plate. Since it abuts against the shoulders on both sides of the section 143, it is urged inward and does not move, and the tip of the operating shaft is provided with a tapered section, so that the operating shaft can be easily moved between the parallel reversing springs. can be inserted into and engaged with it.

Embodiment Figure 1 is a front vertical cross-sectional view of an embodiment in which the pushbutton switch of the present invention is attached to a variable resistor. Shows the switch in an open state. Figure 2 is a partially exploded perspective view of the same, where A is the switch case, B is the actuator, C is the switch section, D is the mounting plate-variable resistor case assembly, E is the switch assembly A', and F is the operating section. Assembly B' is shown. FIGS. 3A and 3B are diagrams showing the state in which the operating shaft is inserted during assembly. In FIGS. 1 to 3B showing the present embodiment and FIGS. 4 and 5 showing the conventional example, the same parts are given the same reference numerals.

In each figure, case 1 has a pair of terminals 2, 2'
and contacts 3, 3' are connected and fixed to each other by sandwiching the upper wall, and the actuator 7 is guided by grooves 22, 22' recessed inside the opposing side walls 21, 21' to move up and down. It is freely accommodated. The actuator 7
has a substantially horizontal base 71, from which a frame 72 extends perpendicularly upward and downwardly extends a pair of hanging walls 73, 73', from which the case further extends. A pair of ears 74, 74' that engage the grooves 22, 22' depend at right angles, respectively.
A square hole 75 is formed between the frame part 72 and the base part 71, and a shorting piece with movable contacts 4 and 4' fixed to both ends is inserted into the square hole in the right angle direction and is moved up and down via the coil spring 6. Possibly held.

In addition, small holes 76 and 76' pass through the ears 74 and 74', respectively, and reversing springs 9 and 76' are respectively inserted therein.
9' is folded back from the intermediate straight portions 91, 91', and each pair of crossed free ends are inserted from opposite directions, so that the straight portions 91, 91' form the ear portions 74,
74', and the small holes 76, 7
They are each supported rotatably about 6' as a fulcrum.

Case engagement frames 14 and 14' extend upward from a pair of opposing sides of the approximately rectangular mounting plate 13 at approximately right angles, and a square hole 142 is bored in the center. A set of two opposite square holes are provided.
A chevron-shaped guide portion 143 projects upward from the side, and the guide portion includes an arc-shaped protrusion 144 and wide widths formed at the bases on both sides, as shown in FIG. A shoulder portion 145 is provided.
A case 15 of a variable resistor having a central hole in the bottom plate is fixed to the lower surface of the mounting plate 13 configured in this way.

When assembling the case 1 and the mounting plate 13, insert the actuator assembly 10 to which the shorting piece 5 and reversing springs 9, 9' are attached in advance into the case 1, and then insert the straight parts of the reversing springs 9, 9'. When placed close to each other, both reversing springs take on an inverted V-shape when viewed from the front, and their straight portions protrude outward from the case. , and press the mounting plate 13 in the direction of the case 1 against the elasticity of the reversing springs 9 and 9' to cover the opening of the case and at the same time engage the engagement frame 14 on the side of the case. A switch assembly A' is constructed by engaging and fixing the protrusions 1a and 1a'. At this time, since the reversing springs 9 and 9' face the mounting plate 13 in an inverted V shape, a force is generated to clamp the guide portion 143 of the mounting plate and press against the shoulder portion 145 thereof.

As shown in FIG. 2C, B' is an operating unit assembly including a known variable resistor 16 excluding the case, and is rotatably and slidably held by a base plate 162 to which a bearing 161 is attached, and the bearing 161. an operating shaft 8 and a slidable slider support 163 co-rotating with the operating shaft;
The slider support 163 limits the sliding range in the axial direction of the operating shaft 8 and the rotational direction on the substrate 162, and the slider for the resistor on the substrate is attached.

As shown in FIG. 3, a ring-shaped groove 81 is provided on the outer periphery near the upper end of the operating shaft 8, and the outer periphery of the tip is tapered 82. Therefore, when connecting the operating part assembly B' and the switch part assembly A', the tip of the operating shaft 8 is pressed against the guide part 143 of the mounting plate at a constant interval. When inserted between the straight portions 91 and 91' of the reversal spring and pushed in, the space between the two reversal springs is initially compressed and opens slightly due to the tapered portion 82, but the tapered portion 91', the reversing spring easily engages with the ring-shaped groove 81 of the operating shaft, and moves the operating part assembly B' to the switch part assembly.
Since it is connected to A', it is fixed by the legs 151 of the variable resistor case 15 to complete the mutual connection.

Effects of the Invention As described above, the present invention consists of a switch case that slidably accommodates an actuator each having a pair of contacts and an approximately elliptical reversing spring, and a mounting plate that combines a variable resistor case, etc. The switch part assembly is assembled in advance by attaching the operation shaft to the switch part assembly in advance. In addition, since a tapered portion is provided at the tip of the operating shaft, in the switch assembly, the reversing spring is held in pressure contact with the guide portion of the mounting plate at a constant interval, and the tapered tip of the operating shaft is provided in between. can be easily inserted and combined with the operating section. As described above, according to the present invention, a push button switch using an elliptical reversing spring can be assembled without requiring any skill, which has a great effect on work efficiency.

[Brief explanation of the drawing]

Figure 1 is a front vertical cross-sectional view of an embodiment in which the pushbutton switch of the present invention is attached to a variable resistor. The left half shows the switch closed by pulling the operating shaft, and the right half shows the switch closed by pushing the operating shaft. Shows open state. Figure 2 is a partially exploded perspective view of the same, where A is the switch case, B is the actuator, C is the switch part, D is the mounting plate-variable resistor case assembly, E is the switch part assembly, and F is the operating part assembly. shows. FIGS. 3A and 3B are diagrams showing the state in which the operating shaft is inserted during assembly. FIG. 4 is a vertical sectional view of the main part of a conventional push button switch, and FIG. 5 is an assembled view thereof. 1: Case, 2: Terminal, 3, 3': Fixed contact,
4, 4': Movable contact, 5: Movable shorting piece, 6: Coil spring, 7: Actuator, 7': Hanging wall, 8:
Operating shaft, 9, 9': Reversing spring, 10: Operator assembly, 11: Switch part, 13: Mounting plate, 14, 1
4': Engagement frame, 15: Variable resistor case, 16:
Variable resistor section, 21, 21': Side wall, 22, 2
2': groove, 71: actuator base, 72: frame, 73,
73': hanging wall, 74, 74': ear part, 75: square hole, 76, 76': small hole, 81: ring-shaped engagement groove,
82: Tapered part, 91, 91': Straight part, 14
2: Square hole, 143: Guide portion, 144: Projection, 1
45: Shoulder part, A, A': Switch part assembly, B,
B′: Operation unit assembly.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A nearly circular inversion device that has a movable contact that faces a fixed contact that is fixed to the inner wall of the case, and has a pair of straight parts on a mover that can slide in the direction of the opening of the case. The springs are rotatably mounted facing each other, and the opposing linear parts of the pair of reversing springs are compressed and engaged with the engagement groove around the tip of the operating shaft, and the contact is made by reversing the reversing spring each time the operating shaft is pushed. In a push button switch that closes and opens, a square hole for inserting the operating shaft is drilled in the center of the mounting plate that covers the opening of the switch case, and a square hole for inserting the operating shaft is provided on both sides adjacent to the opposite sides of the mounting plate. A push-button switch with an upright chevron-shaped guide section that is compressed by a straight section, and a tapered shape around the tip of the operating shaft. (2) The push button switch according to claim 1 of the utility model registration, wherein wide shoulders are formed at the bases on both sides following the central protrusion of the guide portion of the mounting plate.