JPS6023901Y2 - Connection structure between electrical components and circuit board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection structure for connecting electrical components to a circuit board in electronic equipment.

For example, in an electronic cash register, an electrical component having a terminal provided in the device case, such as a terminal of a push button switch unit, is connected to an electrode formed on a circuit board provided inside the device case. Electrical connection between the circuit board and the circuit board is being carried out.

Conventionally, the structure for connecting the terminals of electrical components installed in equipment cases to the electrodes of circuit boards has been to fix the terminals to the electrodes by soldering, or to provide elasticity to the terminals and use this elasticity to connect the terminals to the electrodes. A contact structure is adopted.

However, in the former structure, soldering is required when connecting the terminal to the electrode, which requires a lot of work.
Furthermore, when replacing electrical parts, it is necessary to melt the solder and remove the terminals from the electrodes, which is a time-consuming problem.

In the latter structure, it is necessary to form the terminal of the electrical component into a shape that has elasticity, which can result in a complicated terminal shape, and the process of forming the terminal is time-consuming. There are problems with reliability, such as failure to contact the terminal or poor contact due to a decrease in the elastic force of the terminal.

The present invention was developed in view of the above circumstances, and by pressing the contact made of conductive rubber attached to the terminal of the electrode component against the electrode of the circuit board, the terminal can be reliably connected to the electrode with a simple operation. It provides a connection structure between electrical components and a circuit board.

An embodiment of the present invention will be described below with reference to drawings.

The drawing shows an embodiment in which the present invention is applied to a unit type push button switch as an electrical component.

In the figure, 1 is a unit type push button switch, which has a switch mechanism (not shown) inside a rectangular parallelepiped case 2 and has a vertically movable push button 3 protruding from the top of the case 2 to operate the switch mechanism. A pair of leg-shaped terminals 4, 4 are provided at both ends of the lower part of the case 2 to protrude downward in a straight line.

A rectangular mounting plate 5 is fixed to the upper part of the case 2 by means such as screws, and a pair of mounting holes 6 are formed at both ends of the mounting plate 5.

Note that the push button 3 is inserted into a through hole 5a formed in the center of the mounting plate 5.

Rubber contacts 7, 7 are attached to the lower ends (tips) of the terminals 4, 4 in this push button switch 1, respectively.

The rubber contacts 7, 7 are made of a conductive rubber material, for example, a rubber material mixed with conductive metal powder to make it conductive.

The rubber contacts 7, 7 are cap-shaped and are connected to the terminal 4.
．． An insertion hole that forms a blind hole for inserting 4? a.

7a extends vertically from the upper end surface, and the lower end portion, which contacts electrodes 15, 15 of the circuit board 11, which will be described later, has a hemispherical shape.

Note that the diameter of the rubber contacts 7, 7 is such that the lower end is the electrode 15.
It has a size that allows it to contact 15 in a sufficiently stable manner.

And are the rubber contacts 7 and 7 insertion holes? Terminal 4 to av7a
, 4 is attached to the terminal 4°4.

In this case, for example, the terminals 4, 4 are inserted into the insertion holes 7a, ?, including the effect of the elasticity of the rubber contacts 7, 7. The rubber contacts 7, 7 are firmly attached to the terminals 4, 4 so that they can be inserted and fixed tightly into the terminals 4, 4.

Reference numeral 8 in the figure is an equipment case for an electronic device such as an electronic cash register, which is made of synthetic resin, and has a mounting hole 9 that penetrates inside and outside, that is, in the vertical direction, and is used to mount the push button switch 1. It is.

The upper part 9a of this mounting hole 9 is a rectangular hole having a rectangular shape corresponding to the case 2 of the push button switch 1 and has a depth corresponding to the height of the case 2, and the lower part 9b is a rectangular hole having a larger rectangular shape than the upper part 9a. It becomes.

On the outer surface (top surface) of the device case 1, position mounting screw holes 10, 10 are provided at both ends of the upper part 9a of the mounting hole 9.

In the figure, reference numeral 11 denotes a circuit board that is superimposed on the inside (bottom side) of the equipment case 8, and the mounting screws 12.12 are inserted from below into the mounting holes 13.13 formed on the plate surface. By screwing the mounting screws 12, 12 into the mounting screw holes 14.14 formed on the inner surface (lower surface) of the equipment case 8,
The mounting is fixed inside the device case 8.

A predetermined circuit pattern is formed on the upper surface of the circuit board 11, and a pair of electrodes 15.1 are provided on the part facing the mounting hole 9 of the device case 8, located at both ends of the lower part 9b of the mounting hole 9.
5 is a formality.

This electrode 15.15 is in contact with the rubber contactor 7.7 attached to the terminals 4, 4 of the push button switch 1.
It has a larger size and a spacing corresponding to the terminals 4, 4.

Note that the electrodes 15 and 15 are connected to other parts of the circuit pattern on the circuit board 8 via beams 16 and 16.

Thus, the push button switch 1 is fitted into the mounting hole 9 from the outside (upper side) of the device case 8 to be attached to the device case 1.

The case 2 of the pushbutton switch 1 is located in the upper part 9a of the mounting hole 9, the terminals 4, 4 are located in the lower part 9b, and the mounting plate 5
is polymerized on the outer surface of the equipment case 8.

Then, attach the mounting screws 17, 17 to the mounting holes 6, 6 of the mounting plate 5.
The push button switch 1 is fixed to the equipment case 8 by passing the mounting screws 17, 17 into the mounting screw holes 10, 10 of the equipment case 8 from above.

Also, the terminals 4, 4 in the push button switch 1 and this terminal 4
, 4 are located in the lower part 9a of the mounting hole 9 of the equipment case 8 and are connected to the electrodes 15.1 of the circuit board 11.
The lower end surfaces of the rubber contacts 7.7 are in contact with the electrodes 15.15, respectively.

Since the rubber contacts 7, 7 are made of elastic material, the entire lower end surface is pressed against the electrode 15.15 by elastic force.

The lengths and mounting positions of the rubber contacts 7, 7 to the terminals 4, 4 are set so that they are in sufficient pressure contact with the electrodes 15, 15, respectively.

The push button switch 1 is fixed to a device case 8, a circuit board 11 is fixed to the device case 8, and rubber contacts 7, 7
Since a pressing force is applied to the electrodes 15 and 15, the rubber contacts 7, 7 are reliably and stably pressed against the electrodes 15 and 15 due to the elastic force, and the electrodes 1
5 and 15 can be maintained stably.

That is, the contact reliability between the rubber contacts 7, 7 and the electrodes 15, 15 is high.

In this way, the terminal 4 of the pushbutton switch 1 is connected to the electrode 1 of the circuit board 11 via the conductive rubber contacts 7, 7.
5. Connect electrically to 15.

In addition, when replacing the pushbutton switch 1, use the mounting screw 1
7.17 from the mounting screw hole 10.10 of the device case 1, take out the push button switch 1 from the mounting hole 9 to the outside, and then fit the new push button switch 1 into the mounting hole 9 and install it. can be done easily.

Note that the electrical component is not limited to a push button switch, and may be any other electrical component provided with a terminal.

The rubber contactor is not limited to the configuration of the embodiment, but any rubber contactor may be used as long as it is attached to a terminal of an electric component and comes into contact with an electrode of a circuit board.

The circuit board is not limited to a configuration in which it is attached to an equipment case.

The present invention can be widely applied to structures for connecting electrical components to circuit boards in electronic devices.

As explained above, the connection structure of the present invention between an electrical component and a circuit board is such that a conductive rubber contact is attached to the terminal of the electrical component and the rubber contact is pressed into contact with the electrode of the circuit board. There is no need for troublesome soldering when connecting to the electrodes, improving work efficiency and making it easy to replace electrical parts.

Further, since there is no need to provide elasticity to the terminals of the battery component, there is no need to specially process the terminals into a shape that provides elasticity.

Then, the rubber contacts attached to the terminals of the electrical components are securely pressed against the electrodes of the circuit board, resulting in good contact reliability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view. 1...Push button switch (electrical parts), 4...
...Terminal, 7...Rubber contact, 8...
Equipment case, 9...Mounting hole, 11...
Circuit board, 15... Electrode.

Claims (1)

[Scope of utility model registration request] An electrical component having a protruding terminal and a rubber contact made of conductive rubber attached to the tip of the terminal is inserted into a mounting hole formed by penetrating inside and outside of the device case of an electronic device, with the terminal inside. The electrical component and the circuit board are positioned and inserted and fixed to the equipment case, and the rubber contactor attached to the terminal is brought into contact with an electrode formed on a circuit board provided inside the equipment case. connection structure.