JPH0287430A - Small-sized switch for printed circuit board - Google Patents

Abstract

PURPOSE:To form a small switch for printed circuit board without dispersion of contacting and operating force by furnishing a thin groove aslant at the undersurface of a converter piece with respect to a guide hole in a guide plate, and allowing a slide equipped in this thin groove to move tracing the guide hole in the guide plate. CONSTITUTION:When a grip 20 is tilted to the left, a converter piece 17 moves to the right, and a slide 18 slides in a thin groove 17a in the converter piece under guidance of a guide plate 16 along its guide hole 16a, and the tip slides outward moving apart from the center of a movable contact piece 14 to put a switch into OFF. If the grip 20 is tilted further to the right, the converter piece 17 moves to the left, while the slide 18 slides on the thin groove 17a and movable contact piece 14 along the guide hole 16a from outside toward the center, and the tip depresses the center of the movable contact piece 14. This causes the movable contact piece 14 to deform to come in contact with a stationary contact piece, and switch is turned into ON.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a small switch for printed circuit boards, and in particular,
This invention relates to a small switch for a printed circuit board that opens and closes an electric circuit by moving a slider based on the relationship between an elongated groove provided on the lower surface of a converter and a guide hole provided with a guide plate.

2. Description of the Related Art A conventional small switch for a printed circuit board was constructed as shown in FIG. In FIG.

A fixed contact piece and a common contact piece (terminal) bent into an L-shape are provided on the bottom surface of the main body, and a movable contact piece is placed there. The opening at the top of the 0 body, which allows the handle to be tilted freely, is covered with a cover formed integrally with the sleeve, and a spring is placed in the hole in the bottom of the 0 handle, which allows the handle to tilt freely, to prevent it from slipping upwards inside the sleeve. A slider is provided through the slider, and as the slider slides on the actuating plate, the actuating plate is tilted to press the movable contact piece bent into an arc shape and contact the fixed contact piece. It was something.

Problems to be Solved by the Invention In the conventional switch described above, the movable contact piece and the actuating plate are arranged side by side as shown in Fig. 8, which hinders miniaturization and makes it light and thin. There was an issue with making it shorter.

The present invention has been made in order to solve the above-mentioned problems inherent in the conventional technology, and therefore, an object of the present invention is to provide a novel compact printed circuit board that is simple in structure and has a long service life while reducing the size of equipment. The purpose is to provide a switch.

Means for Solving the Problems In order to achieve the above object; the small switch for printed circuit boards according to the present invention presses a movable contact piece formed by bending an elastic plate into an arc shape by operating a handle. In the switch that opens and closes the switch, a horizontally long groove is provided on the lower surface of the converter connected to the handle, and a slider is slidably disposed in the horizontally long groove, and the slider The movable contact piece is configured to be guided by a guide hole in a guide plate provided below and slidable from the outside toward the center of the movable contact piece.

According to the present invention, when the handle is operated, the slider is guided from the periphery of the movable contact piece to the center by the elongated groove formed on the lower surface of the converter and the guide hole provided in the guide plate, and is bent into a circular shape. By pressing the central part of the movable contact piece and opening and closing between the movable contact piece and the fixed contact piece, the electric circuit is opened and closed.

EXAMPLES Hereinafter, preferred embodiments of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a front sectional view showing a first embodiment of the present invention;
FIG. 2 is an exploded perspective view of the first embodiment of the present invention;
Figures (a) and (b) are diagrams for explaining the operating state of Figure 1.

Referring to FIGS. 1 to 3(a) and (b), a fixed contact piece 12 is provided at the center of the inner bottom surface of the box-shaped main body 11, and a common contact piece 12 is provided outwardly from the center. 13 are arranged respectively, and a movable contact piece 14 which is bent into a circular shape and is in constant contact with the common contact piece 13 on the outside thereof is provided.

A stepped portion 15 is provided on the inner wall of the main body 11, and the step portion 15 includes:
A guide plate 16 in which a guide hole 16a is formed is mounted. On the guide plate 16, there is a guide hole 16a of the guide plate 16 on the bottom surface.
A converter 17 is mounted on which a long and narrow groove 17a is provided obliquely to the converter 17 and a recess 17b is formed in the center of the upper surface, and a slider 18 is inserted into the guide hole 16a and the long and narrow groove 17a, and the tip thereof is It is placed in contact with the movable contact piece 14. The upper opening of the main body is bent into a U-shape and a square hole 19a is provided on the upper surface.A handle 20 is pivotally supported by a shaft 19c on a cover 19 formed with a pair of raised parts 19b, and can be tilted left and right. It is freely deployed.

The lower protrusion 20a of the handle 20 and the recess 17b of the converter 17
engages with the concave and convex portions, allowing the converter 17 to slide left and right, thereby moving the slider 18 in the horizontal direction (Fig. 3 (a), (b)).
(in the vertical direction) to press the movable contact piece 14.

Next, the operation of the first embodiment will be explained in detail with reference to FIG. 1 and FIGS. 3(a) and (b). FIG. 3(a) shows that when the handle 20 is tilted to the right, That is, this is a plan view showing position 3 of the converter 17 and slider 18 when the switch is in the "ON" state B) shown in FIG. 1. In the case of the state shown in FIG. 3(a). When the handle 20 is tilted to the left, the converter 17 moves in the direction of the arrow in FIG.
) (“OFF” state of the switch), the slider 18 is guided along the guide hole 16a of the guide plate 16 and slides in the elongated groove 17a of the converter 17, and the third It stops at the position shown in FIG.
The switch is turned OFF, and when the handle 20 is further tilted to the right, the converter 17 moves in the direction of the arrow in Fig. 3(b) and stops at the position shown in Fig. 3(a), and slides. The child 18 slides on the elongated groove 17a and the movable contact piece 14 from the outside to the center along the guide hole 16a, and its tip presses the center of the movable contact piece 14 downward. As a result, the movable contact piece 14 is deformed and comes into contact with the fixed contact piece, and the switch is turned to 'O'.
N'' (shape R in FIGS. 1 and 3 (&)).

FIG. 4 and FIGS. 5(a) and 5(b) show the second embodiment according to the present invention.
FIG. 2 is a cross-sectional view of main parts and an explanatory diagram of operation showing an embodiment of the present invention. This second embodiment is a case where the present invention is applied to a rotary switch.

In FIG. 4, FIG. 5(a), and (b), similarly to the first embodiment, the converter 27 is provided with an elongated groove 27a on the lower surface, and by rotating the handle 30, the elongated groove 27a is The slider 18 inserted into the guide plate 26 slides into the center of the guide hole 26a, presses the movable contact piece 14, and functions to short-circuit between the fixed contact pieces 12. This guide plate 26 is formed in a circular shape, and a protruding locking piece 26b is provided around the circumference of the guide plate 26. This locking piece 26b has the function of stopping the rotation of the guide plate 26. An O-ring 31 for waterproofing and dustproofing is fitted into the portion where the base and the cover 29 come into contact.

Figure 4 shows the switch in the "'OFF" state, and the fifth
Figure (a) shows the converter 27 and the slider 18 in position 1 with the handle 30 turned to the left as much as possible, which is the ``OFF'' state of the switch corresponding to Figure 4.

On the other hand, FIG. 5(b) shows the positions of the converter 27 and the slider 18 when the handle 30 is turned to the right as much as possible,
In this position, the slider 18a has moved to the upper center of the movable contact piece 14, and by pressing the movable contact piece 14 from above and deforming it, the movable contact piece 14 and the fixed contact piece 12 are separated. The switch is turned on.

FIG. 6 is a perspective view showing the state in which the present invention is used, and shows the state in which it is attached to a printed circuit board 32. 40 is the switch according to the first embodiment explained in FIGS. 1 to 3, and 50 is a The switches according to the second embodiment described in FIGS. 4 and 5 are shown respectively.

FIG. 7 shows a modified embodiment of the first embodiment shown in FIGS. 1 to 3, in which a printed circuit board 3 on which a circuit pattern is formed is shown.
A spacer 33 provided with a circular hole is stacked on the spacer 2, a movable contact piece 14 bent in an arc shape is inserted into the circular hole, and a top sheet 34 is stacked on the spacer 33 to form a contact mechanism section. Then, similarly to FIG. 1, the U-shaped cover 19 with the handle 20 pivotably supported in a tiltable manner is inserted and fixed into the switch mechanism section through a hole 32a. A converter, a guide plate, and a slider are arranged in the same manner as in FIG. 1, and the top sheet 34 is pressed by tilting the handle 20 to open and close the electric circuit. A projection 19d provided on the side surface of the cover clamps and fixes the guide plate 16.

A pressure spring may be provided between the converter and slider described above.

As described in detail, according to the present invention, an elongated groove is provided in the lower surface of the converter in a diagonal direction relative to the guide hole of the guide plate, and the slider disposed in the elongated groove guides the guide plate. Since it is made to move following the hole, various effects as shown below occur.

(1) In response to the movement of the handle, the slider moves within the necessary range from the outside of the movable contact piece toward the center, and has a rational structure that stabilizes the pressing position of the movable contact piece. It is possible to provide a small switch for printed circuit boards with no variation in temperature.

f2) Compared to the conventional switch using a movable contact piece bent into an arc shape as shown in Fig. 8, the bottom area of the switch can be made smaller by about 172 mm, and the printed circuit board can therefore be used more effectively. It can contribute to downsizing of equipment.

(3) We provide a small switch for printed circuit boards that uses a movable contact piece bent in an arc shape, which is thin and has a lifespan more than 10 times longer than conventional switches with a general structure. can.

(b) The structure is relatively simple, making it suitable for mass production.

Can be produced at low cost.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing a first embodiment of the present invention;
FIG. 2 is an exploded perspective view of the same, FIGS. 3(a) and 3(b) are views showing the operating state of FIG. 1, FIG. 4 is a front sectional view showing a second embodiment of the present invention, and FIG. Figure 5 explains its operation.
FIG. 6 is a perspective view showing a state in which the present invention is used, FIG. 7 is a perspective view showing a modification of the first embodiment of the present invention, and FIG. 8 is a sectional view showing a conventional switch. DESCRIPTION OF SYMBOLS 11... Main body, 12... Fixed contact piece, 13... Common contact piece, 14... Movable contact piece, 15... Step part, 16.2
6... Information board, 16a. 26a... Guide hole, 17.27... Converter, 17a
, 27a-! Long groove, 18...Slider, 19.29
...cover, 20.30...handle, 31...0 ring, 32...printed circuit board, 33...spacer, 3
4...Top sheet, 40゜50...Switch diagram agent

Claims (4)

[Claims] (1) In a switch that opens and closes by pressing a movable contact piece formed by bending an elastic plate into an arc shape by operating a handle, a long and narrow groove is provided on the lower surface of the converter connected to the handle. , a slider is slidably disposed in the elongated groove, and is slidable on the movable contact piece from the outside toward the center following the guide hole of the guide plate provided below the converter. A small switch for printed circuit boards, characterized in that it is formed so as to. (2) The small switch for a printed circuit board according to claim (1), wherein the elongated groove provided on the lower surface of the converter and the horizontally elongated guide hole provided in the guide plate are arranged in different directions. (3) The small switch for a printed circuit board according to claim 1 or 2, wherein the switch is opened and closed by tilting the handle left and right. (4) The small switch for a printed circuit board according to claim (1) or (2), wherein the switch is opened and closed by turning the handle.