JPH0312226Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a socket for a connector used, for example, when interconnecting wiring boards.

``Prior Art'' The present applicant previously disclosed in Japanese Patent Application No. 60-289875, under the name ``Connector,'' that a contact consisting of a coil spring is used for the contact on the socket side, and a strip-like contact is used on the plug side. We have proposed a connector in which a contact is inserted between the windings of a contact made of a coil spring to electrically and mechanically connect the contacts of a socket and the contacts of a plug.

The structure of the previously proposed connector will be explained using FIGS. 5 and 6.

In the figure, 100 indicates a socket, and 200 indicates a plug. The socket 100 is a prismatic insulating block 1.
A plurality of holes 12 are formed along the longitudinal direction on one surface of the coil spring 1, and a coil spring 13 serving as a contact is inserted into the hole 12. A protrusion 14 is formed on one side of the surface in which the hole 12 is formed, and a terminal 15 is supported by press-fitting into the slit formed in the protrusion 14. The opposite side of the terminal 15 is projected to a position facing the opening of the hole 12, and its end is bent into a U-shape, and its folded part 16 engages with the end of the coil spring 13. and the terminal 15 are electrically integrated.

A window 17 is formed on the side surface of the insulating block 11, and the winding drum of the coil spring 13 is exposed to the window 17.

The plug 200 is composed of a plurality of contacts 21 embedded in an insulating body 20. The contacts 21 are inserted into the window 17 of the socket 100, and the tips of the contacts 21 push the windings of the coil spring 13 apart. is inserted between the windings of the coil spring 13, and the contacts 21 are sandwiched and contacted between the windings of the coil spring 13, thereby electrically connecting the contacts 21 of the plug 200 and the terminals 15 of the socket 100. do.

In this example, the contacts 21 of the plug 200 are bent at right angles on the back side of the insulating body 20, and their tips protrude from the edges of the insulating body 20 and are led out as the terminals 22 of the plug 200.

A feature of the connector having this structure is that the coil spring 13 is used as a contact on the socket side, so that when the plug 200 is fitted into the socket 100, the contact 21 of the plug 200 is always connected to the coil spring 13 when inserted into the window 17.
The contact state is reached.

In other words, even if the position of the tip of the contact 21 varies somewhat within the opening size of the window 17, as long as the contact 21 enters the window 17, connection between the plug and the socket is always achieved. Therefore, the positioning margin is high, and in this respect, it is possible to provide a connector that is small but easy to connect. In particular, although the figure shows an example of three terminals, there is an advantage that even if the number of terminals increases, the positioning margin is high and the fitting operation between the socket and the plug can be easily performed.

Also, since a coil spring is used as the socket contact, the socket can be made compact. Incidentally, the insulating block 11 constituting the socket 100 can have a thickness of about 3 x 4 mm square, the length can be 7 to 8 mm in a three-terminal type, and the mutual spacing between the terminals 15 can be about 2.5 mm. can.

"Problems to be Solved by the Invention" The socket of the connector proposed earlier has a folded part 16 formed at the end of the terminal 15, and one end of the coil spring 13 is engaged with this folded part 16, thereby connecting the coil spring 13 and the terminal. 15 are electrically integrated.

This structure has the disadvantage that the terminal 15 cannot be press-fitted into the slit of the insulating block 11 by an automatic machine.

In other words, when an automatic machine is used to automatically press-fit multiple terminals, etc. into an insulator, the terminals, etc. are punched out from a conductive plate while maintaining the alignment pitch to be press-fitted and connected by a connecting member. A manufacturing method is adopted in which the connected terminals are press-fitted into an insulator, etc., and after the press-fitting, the connected portions are separated to separate each terminal.

On the other hand, in the socket proposed earlier, terminal 15
Since the folded portion 16 is provided at one end of the terminal, press-fitting must be performed starting from the terminal 15 side.

Therefore, in order to support the terminals 15 in a connected state, they must be connected at the folded portion 16 side. However, since the folded portion 16 exists, it is not possible to provide a connecting portion for connecting other terminals 15 on the folded portion 16 side. This means that it is not possible to connect a plurality of terminals 15 into one body using the connecting portion. Therefore, according to the structure of the terminal 15 shown in FIGS. 5 and 6, the terminal 15
must be manually press-fitted into the insulating block 11 one by one for installation.

In this respect, assembly is time consuming and the structure is unsuitable for mass production.

The object of this invention is to provide a socket having a structure that allows the installation of terminals using an automatic machine.

"Means for solving the problem" In this invention, A. A hole formed on one surface of a prismatic insulating block, and B. A pair of protrusions formed along both sides of the surface where the hole was formed. (C) A contact insertion window for the plug formed on a surface perpendicular to the surface in which the hole was formed; (D) A coil spring housed in the hole; (E) Press-fitted into and supported by a slit formed in a pair of ridges; The opening surface of the hole is closed, the coil spring is compressed and deformed into the hole, the repulsive force of the coil spring is received, it makes electrical contact with the coil spring, and from this contact part it penetrates one of the protrusions and protrudes from the side of the insulating block. A socket for a connector is constructed by a terminal having a portion for connecting the connector and a terminal for connecting the connector to the terminal.

``Function'' According to the structure of this invention, the terminal straddles and penetrates a pair of protrusions and closes the hole at the portion between the protrusions. The portion that closes this hole receives the repulsive force of the coil spring and comes into electrical contact with the coil spring, and the coil spring is compressed and deformed within the hole to maintain the housed state.

Further, the terminal has a portion projecting outward from one of the protrusions, and this projecting portion is connected to a wiring board or the like as an original terminal.

In this way, with this invention, the terminal can be press-fitted across the pair of protrusions. For this purpose, one end of the terminals is made in a connected state while holding the press-fitting pitch, and in this connected state, a plurality of terminals can be press-fitted at once using an automatic machine.

Therefore, according to this invention, it is possible to automate the press-fitting of terminals, which facilitates mass production and is expected to reduce costs.

``Embodiment'' Figure 1 shows a socket according to this invention. In the figure, numeral 11 indicates a prismatic insulating block. In this invention, a hole 12 is formed in one surface of the prismatic insulating block 11, and protrusions 14A and 14B are formed on both sides of the surface in which the hole 12 is formed.

In this embodiment, three holes 12 are formed on one surface of an insulating block 11. A coil spring 13 serving as a contact is inserted into the hole 12 , the opening surface of the hole 12 is closed with a terminal 15 , and the coil spring 13 is compressed and deformed to be housed in the hole 12 .

That is, as shown in FIG. 3, the coil spring 13 is a normally wound coil spring in which the windings are relatively widely spaced apart in a free state. The coil spring 13 is made of a conductive spring material such as phosphor bronze, and is plated with silver in the coil spring state. Therefore, since the windings are open from each other, the wire making up the coil spring can be plated evenly.

The free length L of the coil spring 13 is selected to be longer than the depth of the hole 12, and the coil spring 13 is compressed and deformed to be stored in the hole 12. In the stored state, the windings of the coil spring 13 are connected to the contacts 21 of the plug 200.
The amount of compressive deformation is set so that the gap is smaller than the plate thickness.

The key point of this invention lies in the structure in which protrusions 14A and 14B are formed along both sides of the surface in which the hole 12 is formed. Slits are formed in the two protrusions 14A and 14B, and the terminal 15 is press-fitted into the slit so that the terminal 15 protrudes from the side surface of the insulating block 11 and is supported.

At the same time, the opening of the hole 12 is closed by the portion of the terminal 15 located between the protrusions 14A and 14B, and the coil spring 13 is held down and held in a compressed and deformed state.

For example, as shown in FIG. 4, the terminal 15 is punched out from a conductive plate with one end connected by a connecting member 15A. In this state, the arrangement pitch P of the terminals 15 is selected to be equal to the arrangement pitch of the terminals 15 in the insulating block 11. Plating or the like is performed while the shape is connected by the connecting member 15A, and then it is placed in an automatic mounting machine.

The automatic mounting machine cuts the connecting member 15 at a length corresponding to the number of terminals of the prepared insulating block 11 on the cutting surface A.
(see FIG. 4), and the cut chips are automatically press-fitted into the slits formed in the protrusions 14A and 14B of the insulating block 11.

After being press-fitted into the protrusions 14A and 14B, the terminals 15 are separated by cutting at the cutting surface B.

When press-fitting the terminal 15, use the coil spring 1.
3 is pressed into the hole 12 in a compressed and deformed state using a jig, and in that state, the terminal 15 is slid between the jig and the end of the coil spring 13 to perform press fitting.

Note that the projections 15B (fourth projections) formed on both sides of the terminal 15
Figure 1) shows a protrusion that is press-fitted into the resin of the insulating block 11 and serves to prevent the terminal 15 from coming off.

Further, the coil spring 13 may be wound in a rectangular shape of about 4 to 8 sides instead of a round shape, as specified in the specification and drawings of the previously proposed application. Further, the winding structure of the coil spring 13 may be a normal winding at both ends or only one end, and a close winding near the center. In this case, since the portion of the plug which receives the contact 21 is tightly wound, the force with which the contact 21 of the plug is held between the windings is increased, and there is an advantage that a stable contact state can be obtained.

In this embodiment, a protrusion 18 (FIG. 2) is formed on the surface of the insulating block 11 from which the terminal 15 protrudes. This protrusion 18 engages with a hole formed in the wiring board and is used to define the mounting position of the socket.

"Effects of the Invention" As explained above, in this invention, the terminal 15 can be press-fitted into the slits formed in the protrusions 14A, 14B of the insulating block 11 while being connected by the connecting member 15A. For this reason, the press-fitting can be performed using an automatic machine, making it suitable for mass production.

Furthermore, since no bending or other processing is performed on the terminal 15, a reduction in the cost of parts can be expected in this respect.

[Brief explanation of drawings]

Figure 1 is a perspective view for explaining an embodiment of this invention, Figure 2 is a sectional view for explaining the structure of a socket according to this invention, and Figure 3 is an example of a coil spring used in this invention. Side view, 4th
The figure is a plan view for explaining the manufacturing method of the terminal used in this invention, Figure 5 is a perspective view for explaining the structure of the previously proposed connector, and Figure 6 is for explaining the structure of the previously proposed connector. FIG. 100: Socket, 200: Plug, 11: Insulating block, 12: Hole, 13: Coil spring, 14A, 14B: Projection, 15: Terminal, 17:
Window for inserting the contact of the plug, 18: Protrusion for locating the mounting position on the wiring board, 20: Insulating body of the plug, 21: Contact of the plug.

Claims (1)

[Claims for Utility Model Registration] (1) A: A hole formed on one surface of a prismatic insulating block; B: A pair of protrusions formed along both sides of the surface where the hole is formed; C: The above. a contact insertion window of the plug formed on a surface perpendicular to the surface in which the hole is formed; D a coil spring housed in the hole; The opening surface of the hole is closed, and the coil spring is compressed and deformed into the hole, and receives the repulsive force of the coil spring and comes into electrical contact with the coil spring, and from this contact part passes through one of the protrusions to reach one side of the insulating block. A socket consisting of a terminal having a part protruding from the side;