JPH08148241A - Connector for board - Google Patents

Abstract

PURPOSE: To provide a connector for a board which can be easily mounted on a circuit board and by which stress caused by a temperature change is hardly applied to a lead soldering part after it is mounted. CONSTITUTION: A diametrically contractible elastic installing leg 7 is arranged on a housing 1, and first and second projections 4 and 5 are attached to its leg, and in a position where a positioning member 9 is temporarily locked on the first projection 4, a lead part of a terminal 8 is shallowly entered into a positioning hole 11, and the lead tip is held in a fixed position. The positioning member 9 is formed of the same material with a circuit board, and when a connector C is mounted on the board, it is locked on the second projection 5. By being constituted in this way, positional dislocation by a temperature change in the positioning hole 11 and a through hole of the board is not caused, and stress is hardly applied to a lead soldering part to the circuit board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board connector mounted on a circuit board such as a printed board.

[0002]

2. Description of the Related Art A lead portion of a terminal is pulled out from a housing and bent halfway, and the lead portion is passed through a through hole of a board when the housing is attached to a circuit board.
After that, in the board connector that is soldered to the circuit on the board by the flow soldering process, the lead portion is likely to be deformed, and the lead is often misaligned to make it difficult to insert the lead into the through hole.

For this reason, Japanese Patent Laid-Open No. 4-179078 provides a positioning member for locking the housing at two positions, a first position and a second position, and temporarily locks this member at the first position. In this state, the leading end of the lead portion is shallowly inserted into the positioning hole provided in the positioning member to position the tip, and when the lead is inserted into the through hole, the positioning member is permanently locked at the second position that does not hinder the work. Is proposed.

Further, one of the applications of the present application proposes an improved structure in Japanese Patent Application No. 6-248670.

[0005]

It is desired that the positioning member described above be formed of the same material as the circuit board. If the same material is used, there will be no difference in the coefficient of thermal expansion, so even if the environmental temperature changes, the positioning hole provided in the positioning member and the through hole of the board will not be misaligned, and no excessive force will be applied to the lead. This is because the lead soldered portion is protected.

However, with glass epoxy or the like as the substrate material, it is difficult to form the positioning member having the upright guided portion as described in the above-mentioned publication because it is difficult to form it.

Further, if the positioning member is a simple flat plate, the function of selectively locking the member at two positions is lost, and the leading end of the lead portion before being inserted into the through hole cannot be positioned.

According to the present invention, it is possible to obtain the two effects of protecting the lead soldering portion from thermal stress and positioning the lead tip for surely and smoothly inserting the lead into the through hole. It is an issue.

[0009]

A board connector of the present invention provided as a solution to the above problems is a housing having mounting feet to a circuit board, held by the housing, and a lead portion is pulled out to the outside to mount the board. It is composed of a plurality of terminals bent in a direction parallel to the foot and a plate-shaped positioning member having a positioning hole for the lead portion, and each of the plurality of mounting feet has a foot insertion hole provided corresponding to the positioning member. First and second non-returns that are passed through and locked to the outlet side edge of the hole
The protrusion and the split groove that allows elastic reduction of the foot are provided, the positioning member is formed of the same material as the circuit board or a material having a thermal expansion coefficient equivalent to that of the circuit board, and the positioning member is temporarily locked to the first protrusion. The tip of the lead part is shallowly inserted into the positioning hole, and the second side is located closer to the base of the mounting foot than the first protrusion.
The first projection is passed through the foot insertion hole of the circuit board at the position where it is locked to the projection to be locked to the edge portion on the outlet side of the hole, and the tip of the lead portion is inserted into the through hole of the board. .

[0010]

According to the present invention, the housing is provided with elastically deformable mounting feet, which are passed through the foot insertion holes formed in the positioning member, and the positioning member is lead by the first and second protrusions provided in the mounting foot. Since the temporary locking position where the tip is positioned and the main locking position where the lead tip protrudes the required length are held, the accurate positioning of the lead tip at the temporary locking position is performed using a flat plate-shaped positioning member. Also, by making the positioning member a flat plate, this member is made of the same material as the circuit board or a material having a similar coefficient of thermal expansion to protect the lead soldering part from thermal stress. You can

Further, the mounting foot and the first protrusion provided on the mounting foot also serve as a mounting tool for the housing, and the mounting is completed simply by positioning the housing with the mounting foot and press-fitting it into the hole of the board. Excellent workability.

[0012]

FIG. 1 shows an example of the connector of the present invention. FIG. 1 shows a resin housing having an insertion port 2 for a mating connector, a recess 3 which is open to the rear surface of the housing is provided on the mounting surface side of the housing, and the recess 3 has 1 (c) and 1 (d), a plurality of mounting feet 7 having a first non-return projection 4 and a second projection 5 and a split groove 6 for elastic diameter reduction are integrally formed with the housing 1. ing.

Reference numeral 8 denotes a terminal held by the housing 1. The lead portion of this terminal is drawn out of the housing and bent at a right angle toward the mounting surface side of the housing as shown in FIG. 1 (b). There is.

Reference numeral 9 is a flat plate-shaped positioning member having a foot insertion hole 10 and a positioning hole 11 for the terminal lead portion. The positioning member 9 is made of the same material as the printed circuit board 12 shown in FIG.

FIG. 1 shows a state in which the mounting foot 7 is press-fitted into the foot insertion hole 10 and the positioning member 9 is temporarily locked to the first protrusion 4. In this state, the tip of the lead portion of the terminal 8 is positioned. The positioning hole 11 prevents the positioning hole 11 from entering the hole 11 shallowly (in a state of slightly protruding from the hole 11) and laterally shifting the tip thereof.

FIG. 2 shows a state in which the positioning member 9 is fully engaged with the second protrusion 5. When the connector C is mounted on the printed circuit board 12, the positioning member 9 is lifted up and locked to the second protrusion 5, so that the mounting foot 7 is inserted into the foot insertion hole 13 provided on the printed circuit board 12 and the through hole of the circuit board. Insertion of the lead tip into 14 is allowed.

Therefore, as shown in FIG. 3, the mounting foot 7 is press-fitted into the foot insertion hole 13 so that the first projection 4 is locked to the outlet side edge of the hole 13, and at the same time, the lead end of the terminal 8 is passed through. Pass through hall 14. In the state of FIG. 3, the housing 1 is fixed to the printed circuit board 12, and the terminal lead portions can be stably soldered to the circuit board by the subsequent flow soldering process.

The positioning member 9 is attached to the printed circuit board 12
This connector made of the same material as
Positional deviation of the through hole 14 due to temperature change does not occur, and stress generation at the tip of the lead due to deviation of the supporting point is suppressed, and it is also possible to prevent excessive force from being applied to the lead soldering portion.

The positioning member may be made of a material having a thermal expansion coefficient similar to that of the substrate material.

[0020]

As described above, according to the present invention, the housing is provided with the mounting foot having the first and second projections for non-returning, and the locking position of the positioning member with respect to the mounting foot can be changed. Since the positioning member is temporarily locked to the first protrusion and the lead tip can be kept in a fixed position by the positioning hole formed in the first protrusion, the positioning member can be made flat and made of the same material as the circuit board or It can be made of materials that have similar coefficients of thermal expansion. In addition, the positioning effect of the housing can be obtained by the mounting feet, and it is easy to handle and has high reliability because it has both smooth and accurate mounting on the circuit board and protection of the lead soldering part in the environment where the temperature changes greatly. It becomes possible to provide a connector.

[Brief description of drawings]

1A is a rear view showing an example of a connector of the present invention, FIG. 1B is a partially cutaway side view of the above connector, and FIG. 1C is a perspective view of a mounting foot. Enlarged view of chain line frame

2 (a): a rear view of the connector of FIG. 1 in a state where the positioning member is fully locked (b): a partially cutaway side view of the same as above (c): a chain line frame portion of FIG. 2 (a) Enlarged view

[FIG. 3] (a): Rear view in a state of being mounted on a printed circuit board (b): Partially cutaway side view of the same

[Explanation of symbols]

 1 Housing 2 Insert Port 3 Recess 4 First Protrusion 5 Second Protrusion 6 Split Groove 7 Mounting Foot 8 Terminal 9 Positioning Member 10, 13 Foot Insertion Hole 11 Positioning Hole 12 Printed Circuit Board 14 Through Hole C Connector

Front page continued (72) Inventor Mitsuru Ito 1-14 Nishisuehiro-cho, Yokkaichi-shi In Sumitomo Wiring Systems Co., Ltd. (72) Inventor Hitoshi Okumura 1-14 Nishi-suehiro-cho, Yokkaichi-shi In-company (72) Inventions Person Suzuki Shoji 1-14 Nishisuehiro-cho, Yokkaichi-shi Sumitomo Wiring Systems Co., Ltd.

Claims (1)

[Claims] 1. A housing having a mounting leg to a circuit board, a plurality of terminals held by the housing and having lead portions drawn out to bend in a direction parallel to the mounting legs, and positioning holes for the lead portions. A first non-return member, which is made of a plate-shaped positioning member having a plurality of mounting legs, is passed through a foot insertion hole provided corresponding to the positioning member, and is locked at an outlet side edge of the hole. The second protrusion and the split groove that enables elastic diameter reduction of the foot are provided, the positioning member is formed of the same material as the circuit board or a material having the same coefficient of thermal expansion, and the positioning member is temporarily locked to the first protrusion. At the position where the lead end is shallowly inserted into the positioning hole, and the first projection is passed through the foot insertion hole of the circuit board at a position where it is locked by the second projection on the base side of the mounting foot with respect to the first projection. Lock at the outlet edge of the hole Connector board have to insert the lead tip into the through hole of the substrate together.