JPH046779A - Connecting tool - Google Patents

Abstract

PURPOSE:To suppress a warp generated in the longitudinal direction of a frame and mount the frame on a printed board with no trouble by providing grooves between adjacent pin insertion ports of the frame. CONSTITUTION:Grooves 1f with a square cross section over the width direction are provided at the outsides of the center between adjacent pin insertion ports 1b of a frame 1. The grooves 1f are provided to prevent the lateral direction of the frame 1 from becoming the one-sided state because the pin insertion ports 1b are smaller than opening sections 1c. The size and shape of the grooves 1f are determined so as to correct the difference in size between the pin insertion ports 1b and the opening sections 1c and to balance the volume of the molded portion in the lateral direction. The volume of the molded portion in the lateral direction is balanced, a warp 1e generated in the longitudinal direction of the frame 1 can be suppressed when the frame 1 is molded and terminal metals 2 are connected to the frame 1 by ultrasonic deposition, and the frame 1 can be mounted on a printed board with no trouble.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to connectors such as sockets and connectors.

[Conventional technology]

Conventionally, as this type of connector, there is an IC socket shown below, which will be explained based on FIGS. 6 to 10.

This IC socket is composed of a frame 1 and a terminal fitting 2.

The frame 1 has a substantially rectangular outer shape by molding synthetic resin, and inside the frame 1, substantially cylindrical terminal insertion holes 1a are arranged in rows at the same pitch P (usually 0.1 inch). For example, a plurality of cores (this number is referred to as the number of cores), such as 32 cores, are arranged in the longitudinal direction. This terminal insertion hole 1a
has a rectangular pin insertion opening 1b into which an IC pin is inserted on one side in the transverse direction of the frame l, and a circular opening 1c on the other side, and the size of the opening area is teeth,
Compared to the cross-sectional area of the cylinder of the terminal insertion hole 1a, the pin insertion hole 1
b is small and opening 1c is large. A 7-shaped groove 1cl is provided along the lateral direction at the center position of the terminal insertion holes 1a adjacent to each other on both sides in the longitudinal direction, and this V-shaped groove 1cl is provided at both ends in the longitudinal direction. It has a tapered shape that matches the shape of Id.

The terminal fitting 2 has a pin receiving part 2a made of prepared alloy and a terminal part 2b, and a fitting part 2c having a circular cross section made of synthetic resin.
is integrally molded in the center.

When the frame 1 and the terminal fittings 2 are connected, the terminal fittings 2 are inserted through the opening IC of each terminal insertion hole 1a of the frame l, and the pin receiving portion 2a is inserted into the pin insertion hole! b, and the fitting portion 2C is fitted into the opening IC. The fitting portion 2C is fixed to the opening 1c by ultrasonic welding, and the terminal insertion hole 1a is sealed so that flux does not enter into the terminal insertion hole 1a when this IC socket is soldered to a printed circuit board.

[Problem to be solved by the invention]

In the above-mentioned conventional connector, the frame 1 has a substantially rectangular outer shape by molding synthetic resin, and the substantially cylindrical terminal insertion holes 1a are formed inside the frame 1 at the same pitch P. Since a plurality of, for example 32, are arranged in a row in the longitudinal direction, the longitudinal direction is considerably longer than the transverse direction. Further, the terminal insertion hole 1a is formed with a pin insertion hole 1b on one side in the transverse direction of the frame 1 and an opening 1c on the other side, and the opening area is larger than that of the opening 1c. Since it is larger than the pin insertion opening 1b, the volume of the molded portion is larger on one side where the pin insertion opening 1b is located than on the other side where the opening 1c is located. That is, the frame 1 has a so-called half-walled shape in the width direction and is considerably long in the length direction.

Therefore, when the frame 1 is molded, a warp le occurs in the longitudinal direction as shown in FIG. 10 due to the internal stress due to the above-mentioned shape. Moreover, this warpage 1e becomes even larger when the fitting portion 2c of the terminal fitting 2 is ultrasonically welded to the opening 1c of the frame 1.

If the pitch P of the terminal fitting 2 does not fall within the prescribed dimensions due to this warp 1e, it may become difficult to insert the connecting fitting into the hole of the printed circuit board when mounting it on a printed circuit board, or the length of the terminal part 2b may may become substantially short and problems such as poor soldering may occur.

The present invention has been made in view of the above reasons, and its purpose is to prevent warping in the longitudinal direction of the frame during frame molding and ultrasonic welding of frame terminal fittings. The purpose of the present invention is to provide a connecting tool that can be mounted on a printed circuit board without any trouble.

[Means for Solving the Problems] In order to solve the above problems, the connecting tool of the present invention has the following features:
A frame made of synthetic resin in which a plurality of terminal insertion holes are arranged in a row in the longitudinal direction at the same pitch, each having a pin insertion hole on the blade side and an opening with a larger opening area than the pin insertion hole on the other side; A terminal fitting has a pin receiving part and a terminal part, and a fitting part made of synthetic resin is integrally molded in the center part, and the terminal fitting is inserted into each terminal insertion hole, and the pin receiving part is inserted into the pin insertion hole. In a connecting device which faces an insertion port and has a fitting portion fitted into an opening and fixed by ultrasonic welding, a groove is provided between mutually adjacent pin insertion ports of the frame.

[Function] According to the connector of the present invention, by providing grooves between adjacent pin insertion holes of the frame, the volume of the molded portion in the transverse direction is balanced, so that the molding process of the frame and the frame It is possible to suppress warpage that occurs in the longitudinal direction of the frame when ultrasonically welding terminal fittings to the frame.

[Example] An example of the present invention will be described below based on FIGS. 1 to 5. Note that the same reference numerals are given to the members that are substantially the same as those in the conventional example, and only the differences from the conventional example will be explained.

That is, a section 11f having a square cross section is provided in the width direction on the outside of the center between the mutually adjacent pin insertion holes lb of the frame l. This groove 1 [is, as described in the conventional example,
This is to eliminate the situation where the pin insertion opening 1b is smaller than the opening 1c, so that the short side of the frame 1 is left blank. Therefore, its size and shape are limited to those of this embodiment. First, it is determined so as to correct the difference in size between the pin insertion hole 1b and the opening 1c and balance the volume of the molded portion in the short length direction.

In such a connecting tool, a groove 1f is provided on the outside of the center between the mutually adjacent pin insertion holes lb of the frame 1, and the volume of the molded part in the short hair direction is balanced, so that the molding process of the frame 1 is easy. Furthermore, when the terminal fitting 2 is ultrasonically welded to the frame 1, the warp 1e that occurs in the longitudinal direction of the frame 1 can be suppressed, and the connecting fitting can be mounted on a printed circuit board without any trouble.

For example, when comparing the extent to which warpage 1e can be suppressed by providing grooves If for a 32-core product, although it varies depending on the material used and molding conditions, warpage 1e can be suppressed to about half. Its effectiveness has been proven.

Note that if this connector has more cores than the number of pins of the IC to be installed, it may be cut off at the V-shaped groove 1d provided in the frame 1 to obtain the required number of cores. In this case, if there is a groove 1f as in the present invention, separation can be performed more easily, and furthermore, the cutting burr at that time is in the groove I.
Since it does not come out from F, the divided burr will not hit the rC to be installed.

In addition, when ultrasonically welding the terminal fitting 2 to the frame L, if the thickness is increased by providing ears at both ends of the frame L to prevent the crank from starting at both ends where the frame L is thin, it is also possible to If a groove If is provided between the pin insertion port 1b and the ear, when the ear is removed after ultrasonic welding, the resection will be easy as described above, and the resection burr will be attached to the groove I.
It will no longer hit C.

[Effects of the Invention] Since the connector of the present invention is constructed as described above, the volume of the molded portion in the transverse direction is balanced by providing grooves between the mutually adjacent pin insertion holes of the frame. Therefore, when forming the frame and ultrasonically welding the terminal fittings to the frame, it is possible to suppress warping that occurs in the longitudinal direction of the frame, and therefore, it is possible to mount it on a printed circuit board without any problems. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing an embodiment of the present invention.
FIG. 3 is a top view of the same frame; FIG. 4 is a bottom view of the same frame; FIG. 5 is a front view showing the warped state of the above frame; 7 is a partial front sectional view of the same as the above, FIG. 8 is a top view of the same as the above frame, FIG. 9 is a bottom view of the above frame, and FIG. 10 is a perspective view showing the conventional example. FIG. 2 is a front view showing a warped state of the frame of the same as above. 1-Frame, 1a-terminal insertion hole, lb-pin insertion hole, 1c-opening
1 d - V-shaped groove, 1 e - warpage, 1 f - groove provided between pin insertion openings, 2 - terminal fitting, 2 a - pin receiving part, 2tr - terminal part, 2 cm fitting part. Agent: Patent attorney Toshimaru Takemoto (and 2 others) Figure 1 Flute) Illusion number 1

Claims (1)

[Claims] (1) Made of synthetic resin with a pin insertion hole on one side and an opening with a larger opening area than the pin insertion hole on the other side, with multiple terminal insertion holes arranged at the same pitch in a row in the longitudinal direction. It consists of a frame, a terminal fitting having a pin receiving part and a terminal part, and a fitting part made of synthetic resin integrally molded in the center, and the terminal fitting is inserted into each terminal insertion hole, and the pin receiving part is inserted into each terminal insertion hole. In a connecting device in which a portion faces a pin insertion hole and a fitting portion fits into an opening and is fixed by ultrasonic welding, a groove is provided between mutually adjacent pin insertion holes of the frame. Featured connectors.