JPH0377283A - Socket for substrate - Google Patents

Abstract

PURPOSE:To obtain a socket allowing simple and proper insertion into a substrate by connecting external sleeves for forming sockets containing a notch part and a conical surface to each other at the same pitches as electronic part legs via the predetermined heat resistant, insulating and highly elastic thin film. CONSTITUTION:Sockets A formed with an external sleeve 1 having a conical surface 1a and containing an internal connector 2 fitted with a notch part 2b and the like, are connected at the same pitch as the legs of an electronic part with a heat resistant, insulating and highly elastic thin film such as a silicon rubber 4. According to this construction, the sockets A can be easily and properly inserted into a substrate. Also, it is possible to obtain a socket for a substrate allowing quick connection of a plurality of electronic part legs, and easy insertion into the substrate and easy fabrication.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a board for removably connecting the feet of an electronic component such as an IC or a microcomputer, which has feet serving as a plurality of terminals, to a printed circuit board. Regarding sockets for

[Conventional technology]

Conventionally, when connecting an IC, a microcomputer, etc. to a printed circuit board, a socket is used, except when the legs are soldered directly to the circuit board.

The most common type of socket is a socket made of synthetic resin that contacts the legs of the electronic component with elasticity, and a contact that is inserted into a hole in the board and soldered to the circuit pattern. It was implanted at the same pitch as the foot of the patient.

This socket has the disadvantage that the mounting height of the electronic component is increased by the height of the synthetic resin socket, and the process of embedding the contacts is required, making it very expensive.

Therefore, a board socket as shown in FIG. 5 has become commercially available.

In the figure, reference numeral 1 denotes an external sleeve, the upper end of which is a conical surface 1a, and the lower end a small diameter portion 1b.

Reference numeral 2 denotes an internal contact inserted into the external sleeve 1. Its upper end has a conical surface 2a that closely contacts the conical surface 1a, its lower surface is made elastic by a vertical notch 2b, and its tip is a narrow contact portion 2C. It becomes.

Then, on the upper part of the conical surface 2a, a silicone rubber iH
*3 is inserted.

In this board socket, the small diameter portion 1b of the outer sleeve 1 or its upper part is inserted into the foot insertion position of the electronic component of the printed board, and is soldered to the pattern of the printed board.

In this board socket, the legs of the electronic component break through the thin film 3 and are then guided by the conical surface 2a of the internal contact 2 and inserted into the contact portion 2C, and due to the elasticity of the contact portion 2C, This is to maintain contact between the electronic parts and the feet.

The silicone rubber thin film 3 prevents the inner surface of the internal contact 2 from becoming dirty due to flying flux and other substances during soldering, thereby preventing poor contact with the legs of the electronic component.

[Problem to be solved by the invention] Such a board socket has a number of parts equal to the number of legs of the electronic component.
Since each IC must be inserted into a hole in the board, the insertion process for ICs with a large number of legs is sometimes time-consuming.

In addition, in devices that require cooling, the small diameter portion 1b at the lower end of the external sleeve 1 is inserted into a hole in the board and soldered, but if it is tilted during insertion or soldering, the pitch of the socket for the board will be distorted. There were also problems, such as the feet of electronic components not being able to be inserted.

[Purpose of the invention]

The present invention is intended to solve the above-mentioned problems of the conventional board socket.It simplifies the effort of inserting the socket into the board, and prevents the pinch from going out of order due to tilting with respect to the board. An object of the present invention is to provide a board socket that is easy to manufacture and also has the following advantages.

(Means for Solving the Problems) The present invention relates to means for a board socket for achieving the above-mentioned object, which has a conical insertion opening and an internal contact that is divided into a plurality of parts and has a narrow contact part. , a socket consisting of an external sleeve with a small diameter at the bottom, and a heat-resistant, insulating, high-elastic material such as silicone rubber, etc., including the inside of the conical insertion hole, at the pitch of the legs of an electronic component with multiple legs such as an IC. They are connected by a thin film of material.

[Embodiments of the invention]

Next, one embodiment of the present invention will be described with reference to FIG.

1 is an external sleeve having a conical surface 1a at the upper end and a small diameter portion 1b at the lower end; 2 is inserted into the external sleeve l, and has a conical surface 2a at the upper end and a narrow contact portion 2C at the lower end with a vertical cut 2b. These internal contacts are the same as those of the conventional board socket described above.

In the conical surfaces 1a and 2a at the upper end of this board socket, the distance between each socket A is such that the distance between each socket A is such that the electronic component hardly goes below the end surface, and in other parts it goes below the end surface. They are connected with silicone rubber 4 so that the pitch is the same as that of the feet.

In place of the silicone rubber 4, any material that can be heat-resistant, insulating, and meltable to give it an appropriate viscosity, and that can be made to have high elasticity by solidifying later, can be used.
You can use this.

This board socket is made by inserting the small diameter portion 1b or the upper part of the external sleeve l into the hole of the board as in the conventional case, and
Soldering this to the circuit board pattern is the same as before, and the silicone rubber 4 prevents flux etc. from scattering and entering the internal contact 2 during soldering, preventing poor contact with the legs of the electronic component. is the same as before.

Furthermore, since the silicone rubber 4 is thin on the upper side of the conical surface 2a, it can be easily torn by the feet of electronic components.

However, each socket A is connected by a silicone rubber 4 that is thicker than the upper side of the conical surface 2a, and has the same pitch as the legs of the electronic component, so even if the external sleeve 1 is soldered to the board at an angle, the conical surface 2a The pitch never changes.

Therefore, the feet of the electronic component inserted into the conical surface 2a by tearing the silicone rubber 4 are guided by this and introduced into the contact portion 2C, making it easy to insert the feet of the electronic component.

Furthermore, since each socket A is connected with silicone rubber 4, there is no need to insert each socket into the hole of the board separately.
The required number of sockets A can be inserted at a time, and the effort required for insertion is greatly simplified.

In addition, since a large number of sockets A are connected by silicone rubber 4, it is necessary to manufacture many types of board sockets by cutting and using only the required number of sockets from silicone rubber 4. It disappears. Therefore, it is possible to reduce costs.

Next, a method of manufacturing this board socket using the mold shown in FIGS. 3 and 4 will be described.

This mold B is provided with a large number of holes C having an inner diameter equal to the diameter of the lower end of the conical surface 1a at the same intervals as the pitch of the legs of the electronic component.

An earthen embankment is formed outside one or more rows of holes C to be slightly higher than the upper end to the socket.

Silicone rubber 4 adjusted to an appropriate viscosity is poured into the earthen embankment of this type B to the same height as the earthen embankment.

Then, the part on the conical surface la does not enter into the conical surface 2a due to surface tension, and becomes at the same height as the upper end of the conical surface 2a, and the thin film of silicone rubber 4 corresponding to the difference between the height of the earth embankment and the height of the socket A. is formed.

On the other hand, since the distance between the sockets A is wide, the strong surface tension as described above does not work, and the thickness reaches the mold surface to maintain the pitch between the sockets A.

Thereafter, the silicone rubber 4 is left to stand for 12 hours to cure, and the cured silicone rubber 4 is peeled off from the mold B together with the socket A to complete the mold.

〔Effect of the invention〕

The present invention is like a ridge, each socket is the same pitch as the foot of the electronic component, and is made of heat resistant material such as silicone rubber! Since they are connected by a thin, highly elastic thin film, the required number of pieces can be cut out as a set and inserted into a hole in a printed circuit board in one go, so the insertion time can be significantly shortened.

In addition, even if the soldering to the printed circuit board is tilted, the pitch of the conical surface that serves as the insertion guide for the electronic component's feet is ensured to be the same pitch as the electronic component's feet, making it easy to insert the electronic component's feet. I can do it.

In addition, a board socket with many other features that also has the advantages of conventional board sockets can be obtained.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a sectional view showing the inserted state of the legs of the electronic component, Fig. 3 is a perspective view of the mold for manufacturing this, and Fig. 4 is its sectional view. , FIG. 5 is a partially cutaway oblique view of a conventional board socket. A...Socket, B...Type, 1...External sleeve, la...Conical surface, 2b...Notch, 2c...
Contact part, 4... silicone rubber. Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A socket consisting of an internal contact that has a conical insertion opening, is divided into a plurality of parts and has a narrow contact part, and an external sleeve with a small diameter bottom is used to adjust the pitch of the legs of an electronic component such as an IC that has multiple legs. , including the inside of the conical insertion port,
A board socket characterized by being connected by a thin film of heat-resistant, insulating, and highly elastic material such as silicone rubber.