JPH09219131A - Terminal base board and switch using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal base board whose terminal assembly can be efficiently and stably fixed to an insulating substrate and by which the height of the whole switch can also be reduced and a switch using it in an operation switch to be installed in a cabin or the like of an automobile. SOLUTION: A bending root part of a connecting terminal part 12B of a terminal assembly 12 inserted into a hole 11C of an insulating substrate 11, is pressed down by an insulating washer 13 fitted in a groove 11E of a projection 11D on an upper surface of the insulating substrate 11, and the terminal assembly 12 is fixed to the insulating substrate 11, and a terminal base board is formed. In the case where the terminal base board and an insulating resin- made hanging bell-shaped cover 14 are joined together and are assembled as a switch, when the outer periphery of a plane contact point part 12A of the terminal assembly 12 is pressed down by a step part 14C on the outer peripheral lower end of the cover 14, the terminal base board having a stable quality can be easily formed, and the terminal base board low in height and a switch using it can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal board used mainly for an operation switch mounted in a passenger compartment of an automobile and a switch using the terminal board.

[0002]

2. Description of the Related Art A terminal board used for a conventional operation switch of this type and a switch using the same will be described with reference to FIGS.

FIG. 5A is a plan view of the terminal board, FIG. 5B is a front sectional view of the same, and FIG. 5C is a bottom view of the same. In FIG. It is composed of a contact board portion 1A and a connector housing portion 1B on the bottom surface. On the top surface of the contact board portion 1A, as shown in FIG. Are radially arranged from the inside of the housing portion 1B as shown in FIG.
And as shown in (c), the connection terminal portion 2B of the terminal board 2
Project from the lower surface of the contact substrate portion 1A.

The terminal plate 2 consisting of the flat contact portion 2A and the connecting terminal portion 2B is formed by bending a metal plate into an L-shape as shown in FIG.
As shown in FIG. 5 (b), is inserted from above into the through hole 1C near the center of the circular contact board portion 1A of the insulating board 1 to penetrate the contact board portion 1 in the connector housing portion 1B.
The stepped portion 2C of the connection terminal portion 2B that is exposed on the lower surface of A is fixed by caulking to prevent the terminal portion 2 from being attached to the insulating substrate 1 to form a terminal substrate, which is inserted into the connector housing portion 1B. It is configured to be connected to an external device by coupling a socket portion (not shown) of the mating connector.

FIG. 7 shows a front sectional view of a switch using the terminal board thus formed.

In the figure, reference numeral 3 denotes a bell-shaped cover made of molded resin, which is fitted to a bearing portion 3A at the upper center thereof so that an operating shaft portion 4B integrated with a rotating body 4A can be rotated by a predetermined angle. The terminal board is arranged so as to hold and cover the opening on the lower surface thereof, and the projection 1D on the outer periphery of the contact board portion 1A is fitted by being fitted into the hole 3B at the lower end of the outer periphery of the cover from below.

The protrusion 4C below the central portion of the rotating body 4A is rotatably supported on the upper surface of the central portion of the contact substrate portion 1A, so that a rotation is ensured at a predetermined distance from the upper surface of the contact substrate portion 1A. The movable contact 5 is held on the lower surface of the body 4A, and the elastic contact 5A elastically contacts the flat contact portion 2A on the contact substrate portion 1A of the terminal substrate to form the contact portion of the switch.

Further, the moderation pin 6 held on the top of the cover 3 causes the uneven surface 4 on the upper surface of the rotating body 4A by the pressure of the spring 7.
A moderation mechanism portion is formed by elastically contacting D, and as shown in the cross-sectional view of FIG. 8, it is fitted into one of the recesses 4D1 in a normal state, and the rotation angular position of the rotating body 4A, that is, the elasticity of the movable contact 5 The position of the contact substrate portion 1A with which the contact 5A contacts is kept stable.

The operation of the switch constructed as described above will be described. By rotating the knob 8 mounted on the upper portion of the operating shaft portion 4B, the operating shaft portion 4B, that is, the rotating body 4A is rotated. As a result, the radial concave-convex surface 4D on the upper surface of the rotating body 4A rotates, the position of the concave portion where the moderation pin 6 makes elastic contact moves beyond the convex portion 4D2 to the other concave portion 4D3, and at the same time the movable body held on the lower surface of the rotating body 4A moves. The elastic contact 5A of the contact 5 moves from the planar contact at the position where it has been in contact until then to the adjacent planar contact as indicated by an arrow in FIG. 5A, and the signal is output to the connection terminal portion 2B. It is a thing.

[0010]

However, in the above-described conventional terminal board and the switch configuration using the same, the method of fixing the terminal plate 2 including the flat contact portion 2A and the connection terminal portion 2B to the insulating substrate 1 is an insulation method. This is because the connection terminal portion 2B is inserted and penetrated into the through hole 1C of the contact board portion 1A of the board 1 from above, and the step portion 2C of the connection terminal portion 2B projected on the lower surface of the contact board portion 1A is caulked. The connecting terminal portion 2B also serves as a connecting plug portion of the connector, and the arrangement pitch thereof is also regulated, so that it cannot be increased, and the caulking step portion 2 is also provided.
Since C is at the back of the connector housing 1B, a dedicated caulking jig is required, and if the caulking is too strong, the tip of the planar contact portion 2A rises, and the caulking work is inefficient.

There is also a problem that the height of the connection terminal portion 2B of the terminal board and the connector housing portion 1B, that is, the height of the entire switch is increased by the height of the caulking allowance.

The present invention is intended to solve such a conventional problem, and provides a terminal board capable of efficiently and stably fixing a terminal board to an insulating board and reducing the overall height of the switch, and a switch using the same. It is intended to be provided.

[0013]

In order to solve the above problems, the present invention provides a protrusion having a groove on the outer periphery at the center of the upper surface of an insulating substrate, and an insulating washer fitted in the groove of the protrusion causes Hold the base of the flat contact of the terminal plate inserted in the hole to the bottom of the bend to form a terminal board with the terminal board fixed to the insulating board, and combine the terminal board and the bell-shaped cover made of insulating resin as a switch. At the time of assembling, the outer periphery of the flat contact portion of the terminal plate is pressed by the step portion at the lower end of the outer periphery of the cover.

As a result, a terminal board of stable quality can be easily formed, and a terminal board having a low height and a switch using the terminal board can be provided.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an insulating substrate in which a protrusion having an engaging groove formed on the outer periphery is provided in the center of the upper surface, and the lower surface is a connecting portion to be connected to the outside. And a connecting portion on the same lower surface side as the flat contact portion which is formed by bending a metal plate into an L shape, is inserted and penetrated from a top surface side into a hole provided in the vicinity of the protrusion of the insulating substrate, and which is in close contact with the upper surface of the insulating substrate A terminal plate having a connection terminal part to be inserted into the terminal plate, and an insulating washer fitted in a groove on the outer periphery of the protrusion of the insulating substrate so as to press the bent root part of the flat contact part of the terminal plate. Therefore, the terminal board can be easily and surely fixed to the insulating board, and the height of the terminal board and the entire switch can be reduced.

According to a second aspect of the present invention, in a switch using the terminal board according to the first aspect, a step portion that abuts a tip of a flat contact portion of a terminal plate arranged on an upper surface of the terminal board is provided at a lower end of an outer periphery. A bell-shaped cover made of insulating resin, which is provided and coupled to the upper surface side of the terminal board, and a movable contact elastically contacting with the flat contact portion are held on the lower surface side and are arranged inside the cover, and at the same time, on the upper surface side. The operation shaft provided is a rotary operation type configuration that consists of a rotating body that is rotatably engaged with a bearing provided in the center of the upper part of the cover, and the tip of the flat contact part of the terminal plate is completely lifted. It has the effect that it can be prevented.

According to a third aspect of the present invention, in the invention according to the second aspect, a ring-shaped protrusion is provided on the surface of the rotating body facing the terminal board, the ring-shaped projection surrounding the outer circumference and part of the upper surface of the insulating washer of the terminal board. The connection terminal part of the terminal board is strongly pressed upward, and when the force to remove the insulating washer holding the bent root part of the terminal board acts, the insulation is performed. This has the effect of preventing the elastic washer from being deformed and coming off.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. 1A is a plan view of the terminal board according to the embodiment, FIG. 1B is a front sectional view of the same, and FIG.
1 is a bottom view of the same. In FIG. 1, 11 is an insulating substrate made of molding resin, which is composed of a disk-shaped contact board portion 11A and a connector housing portion 11B on the lower surface.
As shown in FIG. 1A, the flat contact portions 12A of the plurality of terminal plates 12 are arranged radially from the circular center on the upper surface of A, and inside the housing portion 11B, as shown in FIGS. As shown in c), the configuration in which the connection terminal portion 12B of the terminal board 12 projects from the lower surface of the contact board portion 11A is the same as the conventional example.

Then, the flat contact portion 12A and the connection terminal portion 1
As shown in FIG. 2, the terminal plate 12 made of 2B is formed by bending a metal plate into an L-shape, and its connection terminal portion 12B is formed.
As shown in FIG. 1 (b), it is the same configuration as the conventional example to insert and penetrate from above into a through hole 11C near the center of the circular contact substrate portion 11A of the insulating substrate 11. As shown in FIG. 3, the C-shaped insulating washer 13 is laterally fitted into the groove 11E on the outer periphery of the protrusion 11D provided at the center of the upper surface of the contact board portion 11A, and the connecting terminal portion 12B is bent at the lower surface thereof. The connection terminal portion 12B is prevented from coming off and fixed by pressing the root portion of the terminal board, and the terminal board 12 is attached to the insulating board 11 to complete the terminal board.

Next, FIG. 4 is a front sectional view of a switch according to an embodiment of the present invention using the terminal board thus formed.

In the figure, reference numeral 14 is a bell-shaped cover made of molded resin, and a rotor 15 is attached to a bearing portion 14A in the upper center thereof.
The operation shaft portion 15B integrated with A is rotatably fitted and held, and the terminal board is arranged so as to cover the opening of the lower surface thereof. The projection 11F on the outer circumference of the contact board portion 11A covers the lower end of the outer circumference of the cover. Although it is coupled by being fitted into the hole 14B of the above from below,
When the cover 14 and the terminal board are combined, the flat contact portion 12 on the contact board portion 11A is formed by the step portion 14C at the lower end of the outer periphery of the cover.
The tip of A is pressed down to prevent it from rising.

Then, the lower surface of the central portion of the rotating body 15A is rotatably supported by the tip of the protrusion 11D at the center of the upper surface of the contact substrate portion 11A, so that a predetermined space is secured between the upper surface of the contact substrate portion 11A. A movable contact 16 is held on the lower surface of 15A, and the elastic contact 16A is attached to the contact substrate 11
The flat contact portion 12A on A is elastically contacted to form a switch contact.

Further, the moderation pin 17 held on the upper part of the cover 14 is elastically contacted by the pressure of the spring 18 with the concave and convex portion 15C on the upper surface of the rotating body 15A to form a moderation mechanism, as in the conventional example. It is a composition.

Further, the movable contact 16 on the lower surface of the rotating body 15A.
The ring-shaped protrusion 15D provided inside is provided so as to surround the outer peripheral surface and the outer peripheral upper surface of the insulating washer 13 fitted in the groove 11E on the outer peripheral surface of the protrusion 11D on the upper surface of the contact substrate portion 11A facing each other. The insulating washer 13 is prevented from being deformed and coming off the groove 11E.

The operation of the switch of the present embodiment configured as described above is exactly the same as the operation of the switch of the conventional example, and therefore its explanation is omitted.

[0026]

As described above, according to the present invention, the terminal board having the terminal board fixed to the insulating board can be efficiently and stably assembled without using a special jig or the like for fixing the terminal board. It is possible to obtain a switch having a low height and stable quality.

[Brief description of drawings]

FIG. 1A is a plan view of a terminal board according to an embodiment of the present invention, FIG. 1B is a front sectional view of the terminal board, and FIG.

FIG. 2 is a perspective view of the terminal board.

FIG. 3 is a plan view illustrating a method of mounting an insulating washer on the terminal board.

FIG. 4 is a front sectional view of a switch using the terminal board.

5A is a plan view of a conventional terminal board, FIG. 5B is a front sectional view of the same, and FIG. 5C is a bottom view of the same.

FIG. 6 is a perspective view of the terminal board.

FIG. 7 is a front sectional view of a switch using the terminal board.

FIG. 8 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 11 Insulating Substrate 11A Contact Board Part 11B Connector Housing Part 11C Through Hole 11D Protrusion 11E Groove 11F Projection Part 12 Terminal Plate 12A Flat Contact Part 12B Connection Terminal Part 13 Insulating Washer 14 Bell Bell Cover 14A Bearing Part 14B Hole 14C Step Part 15A Rotating body 15B Operation shaft part 15C Uneven part 15D Ring-shaped protruding part 16 Moving contact 16A Elastic contact 17 Moderation pin 18 Spring

Claims (3)

[Claims] 1. An insulating substrate having a protrusion having an engaging groove formed on the outer periphery at the center of the upper surface and a lower surface serving as a connecting portion to be connected to the outside, and a metal plate bent in an L shape, A terminal board having a flat contact portion that is inserted and penetrated from a top surface side into a hole provided in the vicinity of the protrusion of the insulating substrate and that is inserted into a connection portion on the lower surface side that is in close contact with the upper surface of the insulating substrate, and A terminal board comprising an insulating washer fitted in a groove on an outer periphery of a protrusion of the insulating board so as to hold down a bent root of a flat contact portion of the terminal board. 2. A bell-shaped cover made of an insulating resin, which is connected to the upper surface of the terminal board and has a step portion at the lower end of the outer periphery, which is in contact with the tip of the flat contact portion of the terminal plate arranged on the upper surface of the terminal board. , The movable contact elastically contacting the flat contact portion is held on the lower surface side and is disposed inside the cover, and the operation shaft provided on the upper surface side is rotatably engaged with a bearing portion provided at the center of the upper portion of the cover. A rotary operation type switch using the terminal substrate according to claim 1, which is formed of a rotating body. 3. The switch according to claim 2, wherein a ring-shaped protrusion is provided on the surface of the rotating body facing the terminal board so as to surround the outer circumference and part of the upper surface of the insulating washer of the terminal board.