JPH0624136Y2 - Connecting terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a connection terminal for connecting a small printed circuit board and a mother printed wiring board which can be used in an electronic circuit device or the like for which high-density mounting is desired.

2. Description of the Related Art In recent years, there has been an increasing demand for smaller, thinner, lighter, and more sophisticated electronic devices, and along with this, it is extremely important to increase the density of circuits in these electronic devices to improve their reliability. It is becoming an important issue.

Under such circumstances, various mounting technologies have been studied in recent years in order to increase the density and reliability of electronic circuits. A circuit block body is created by dividing the electronic circuit to be divided into several functional circuits and integrating the circuit elements forming each functional circuit block, and this circuit block body is mounted on a mother printed wiring board. There are some that make up electronic circuits.

A device incorporating such a concept of functional block is used in many electronic devices because it has excellent effects not only in miniaturization and high density of electronic circuits but also in high reliability.

Hereinafter, a conventional example will be described with reference to the drawings.

FIG. 3 shows a state in which a small printed circuit board 2 having small electronic components mounted thereon is mounted on a mother printed wiring board 1 through a plurality of connection terminals 3. As shown in FIG. 4, the connecting terminals 3 connected to the mother printed wiring board 1 and the small-sized circuit board 2 are generally formed by connecting a group of connecting terminals 3 at the connecting portion on the mother side. The connection terminal 3 has a holding portion 3a at its tip.
After sandwiching the conductor portion for external connection provided on the small circuit board 2 and connecting it by soldering, etc., the conductor portion for external connection is cut by the broken line portion AA 'in FIG. The leg portion 3b of the terminal 3 is inserted into a mounting hole provided in the mother printed wiring board 1 and soldered to form an electronic circuit device as shown in FIG.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described configuration, when the number of connection terminals 3 is large, or when the connection terminals 3 are long, any of the connection terminals is slightly deformed, the mother printed wiring board There is a problem that it is extremely difficult to attach the leg portion 3a of the connection terminal 3 to the mounting hole of No. 1. Also, mother printed wiring board 1
When the leg portion 3a of the connection terminal 3 is inserted into the mounting hole of and mounted, the minimum pitch of mounting the connection terminal of the small circuit board 2 is determined by the minimum designable pitch of the mounting holes provided in the mother printed wiring board 1. It That is, the designable minimum pitch of the mounting holes is determined by the material and thickness of the mother printed wiring board 1. Therefore, the small circuit board 2
If the number of connection terminals 3 mounted on the small circuit board is large, the size and shape of the small circuit board is governed by the number of mounted connection terminals 3, which is extremely disadvantageous in terms of the component mounting density of the small circuit board itself. There was a problem. Further, with this configuration, there is a problem that stress due to warpage or twist of the mother printed wiring board 1 is easily applied to the small circuit board 2, and cracks may occur depending on the material of the small circuit board 2.

The present invention solves such a problem, and an object thereof is to provide a connection terminal that realizes high-density mounting and can easily mount a small circuit board on a mother printed wiring board. is there.

Means for Solving the Problems In order to solve this problem, the present invention provides a connection terminal for electrically and mechanically coupling a small circuit board to a mother printed wiring board, which is suitable for a longitudinal direction of a prismatic insulating member. A large number of terminal members are wound around and mounted at intervals, the terminal member located on the bottom surface of the insulating member is connected to the mother printed wiring board side, and the terminal member protruding from the upper end of the insulating member is parallel to the bottom surface. The unit is configured to be connected to a small circuit board.

With this configuration, it is possible to place the bottom surface of the prismatic insulating member on the mother printed wiring board and position the bottom surface of the mother printed wiring board without providing the mounting holes for inserting the connection terminal legs in the mother printed wiring board, unlike the conventional case. It is possible to easily connect the connection terminals to the mother printed wiring board by the surface mounting method using a member. Moreover, as described above, the mother printed wiring board does not need a mounting hole, so the material of the mother printed wiring board The terminal pitch can be determined regardless of the thickness, and high-density mounting can be realized. Also, the stress of warping and twisting of the mother printed wiring board can be absorbed and relieved by the springiness of the protruding portion of the terminal member, and there is no cracking of the small printed circuit board. The substrates can be easily connected.

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

In FIG. 1 and FIG. 2, reference numeral 11 denotes a connection terminal for mounting a small circuit board 13 having a small electronic component 12 and a conductor for external connection on a mother printed wiring board 14.
As shown in FIG. 2, 11 is a triangular columnar insulating member 15 made of resin or the like, and a large number of terminal members 16 at appropriate intervals in the longitudinal direction.
It is configured by winding and mounting. More specifically, each terminal member 16 has one end located slightly below the upper end of one slope 15a of the insulating member 15, and the slope 15a to the bottom surface 15b,
It is wound around the other slope 15c, and the other end protrudes from the upper end of the other slope 15c toward the one slope 15a side so as to be parallel to the bottom surface 15b, and the protruding portion 16a thereof is the small circuit board 1
It is connected to 3 by soldering. To connect the connection terminal 11 to the mother printed wiring board 14, the bottom surface 15b of the insulating member 15 is placed on the mother printed wiring board 14, and the terminal member 16 located on the bottom surface 15b is mounted on the mother printed wiring board 14 by the surface mounting method. Connected and performed. As a result, the small circuit board 13 is electrically and mechanically coupled to the mother printed wiring board 14 via the connection terminal 11.

As described above, according to the present invention, it is not necessary to provide a mounting hole for inserting a connecting terminal leg portion in a mother printed wiring board as in the conventional case, and the bottom surface of a prismatic insulating member such as a triangular prism is mounted on the mother printed wiring board. The connection terminal can be easily connected to the mother printed wiring board by the surface mounting method by using the terminal member placed on the board and located on the bottom surface, and as described above, the mounting hole is formed in the mother printed wiring board. Since it is not necessary, the terminal pitch can be determined regardless of the material and thickness of the mother printed wiring board, and high-density mounting can be realized. Also, the stress of warping and twisting of the mother printed wiring board can be absorbed and relieved by the springiness of the protruding portion of the terminal member, and there is no cracking of the small printed circuit board. The substrates can be easily connected.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a sectional view showing a mounting state, FIG. 2 is a perspective view of a connecting terminal,
3 and 4 show a conventional example, FIG. 3 is a sectional view showing a mounted state, and FIGS. 4 (a) and 4 (b) are a front view and a side view of a connection terminal. 11 ... Connection terminal, 12 ... Small electronic component, 13 ... Small circuit board,
14 ... Mother printed wiring board, 15 ... Insulation member, 16 ... Terminal member,
16a ... projection.

Claims (1)

[Scope of utility model registration request] 1. A connection terminal for electrically and mechanically coupling a small circuit board to a mother printed wiring board, wherein a large number of terminal members are wound and mounted at appropriate intervals in the longitudinal direction of a prismatic insulating member, A connection configured such that the terminal member located on the bottom surface of the insulating member is connected to the mother printed wiring board side, and the protruding portion of the terminal member protruding from the upper end of the insulating member in parallel with the bottom surface is connected to the small circuit board. Terminal.