JPH0136310Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention pushes the terminal array plate portion of a wiring board into a wiring board insertion groove of a connector housing, and inserts the terminal arrangement plate portion of a wiring board between rows of contacts arranged in parallel in the insertion groove. intervene,
The present invention relates to a connector for a wiring board in which contact is achieved by the pinching elasticity of the contacts.

Prior art and its problems Japanese Utility Model Application Publication No. 82994/1983 discloses a connector using a contact having a two-piece spring structure as a connector for the above-mentioned wiring board. The present invention relates to an improvement on the known technology.

In the above-mentioned known technology, each contact has two parallel elastic contact pieces 1 and 2, as shown in FIGS. 8 and 9,
One side passing surface of the parallel elastic contact pieces 1, 2 is used as a contact surface, and the outer surface of the tip of each parallel elastic contact piece 1, 2 is locked to the locking walls 3a, 3a of the connector housing so that the passing surfaces coincide. While the claws 1b and 2b are projected to prevent forward tilting, a pair of protrusions 1a and 2a are provided on the inner surface of the distal end of each parallel elastic contact piece 1 and 2 to abut each other, and both parallel elastic contact pieces 1, The intention is to keep the distance between the two points constant. FIG. 8 shows the normal projection abutting state (space maintained state).

However, in the above-mentioned known technology, the apex of the protrusion 1a and the protrusion 2
Since it is intended to maintain the distance by butting with the apex of a, it is easy to cause slippage, and due to some external factors,
In particular, the pressing force when pushing the wiring board between the rows of contacts easily induces the above-mentioned slippage, causing the protrusions 1a and 2a to alternately fall down and engage, as shown in FIG. It becomes difficult to maintain the distance,
This has the disadvantage of causing a detrimental offset of the parallel elastic contact pieces 1, 2. In addition, in combination with this deviation, the parallel elastic contact pieces 1 and 2 are vertically shifted in opposite directions due to the positional deviation of the protrusions, causing variations in the alignment of the parallel elastic contact pieces and causing the contact surfaces 1c and 2c to be aligned. This causes a mismatch as shown in FIG. 9, resulting in a problem in which uniform contact becomes difficult.

Purpose of the invention The present invention improves the above-mentioned contact defects such as the abutment of protrusions in conventional connectors and the contact problems caused by this, and makes more effective use of the effectiveness of the two-spring structure contacts. The present invention provides a wiring board connector configured as a wiring board connector.

Structure of the invention The present invention has been made to achieve the above object, and is provided with a protrusion for preventing deviation only on one of the parallel elastic contact pieces of the contacts arranged in parallel, and the protrusion is placed in the parallel The head locking piece bent at the tip of the elastic contact piece is placed in front of the tip edge, and in this arrangement, the deviation prevention protrusion is formed on the inner surface of the head locking piece of the other parallel elastic contact piece. A protrusion sliding surface is formed from the opposing part to the tip edge, and even if vertical displacement occurs due to external force applied when pushing the wiring board, etc., the protrusion can still move normally while allowing slight sliding on the sliding surface. It enables self-recovery to a normal posture, effectively prevents slipping off of the tip edge of the elastic contact pieces due to butting of protrusions, and properly maintains the distance between the parallel elastic contact pieces and matches the contact surfaces of the contact surfaces. It is something to do with Mr.

Embodiments of the invention Examples of the invention will be described below with reference to FIGS. 1 to 7.

In FIG. 3, reference numeral 15 denotes a connector housing made of an insulating material, and has an opening at the inner wall surface of the wiring board insertion groove 15d facing the length of the wiring board insertion groove 15d of the connector housing 15, and an opening at the opening surface of the insertion groove. A large number of contact accommodating holes 15a are opened at equal pitches, contacts 11 are implanted in each of the contact accommodating holes 15a and arranged in a facing state, and the terminal array plate portion of the wiring board 14 is pushed into the insertion groove 15d. It intervenes between the rows of the contacts 11 and makes contact using the squeezing elasticity of the contacts 11. FIG. 3 shows a pair of contacts facing each other in the insertion groove 15d in plan view, and the facing state continues from left to right in the figure.

As shown in FIG. 1, the contact 11 has a pair of parallel elastic contact pieces 12 and 13. The parallel elastic contact pieces 12 and 13 are connected to the wiring board insertion groove 1.
5d are connected to each other on the bottom side, and their tips are arranged on the entrance side of the insertion groove 15d, and the wiring board 1
4 extends vertically in the direction of insertion and removal. The intermediate portions of the parallel elastic contact pieces 12 and 13 extending in the insertion groove 15d are bent at the waist in the direction facing the contact, and the top surfaces of the contact facing surfaces protruded by the waist bending form contact surfaces 12c and 13c. forming the contact surfaces 12c, 13
Insertion guide surface 12d of wiring board 14 at the upper end of c.
13d is coupled.

Head locking pieces 12a, 13a which can be bent in a direction opposite to the surface facing the contact are formed at the tips of the parallel elastic contact pieces 12, 13 made as described above. That is,
The head locking pieces 12a, 13a are connected to contact pieces forming the contact surfaces 12c, 13c and the wiring board insertion guide surfaces 12d, 13d.

Each of the head locking pieces 12a, 13a has hook-shaped locking claws 12 that are protruded outward from each other at the ends thereof.
b, 13b. On the other hand, a locking wall 15c facing each of the locking claws 12b and 13b is formed on each partition wall of the contact receiving hole 15a, and the locking claws 12b and 13b are respectively attached to the locking wall 15c on the side facing the contact. This locks the contact surfaces 12c and 13c to prevent them from falling forward and to align the contact surfaces 12c and 13c. The locking surfaces 12e, 13e of the locking claws 12b, 13b are inclined at a biting angle with respect to the locking surface of the locking wall 15c, and are locked into the inner part of the locking wall 15c with the edge of the tip. Locking claws 12b, 13b to the locking wall 15c
The locking is performed with the parallel elastic contact pieces 12 and 13 storing elasticity. That is, each parallel elastic contact piece 12, 13
The locking is performed against the elastic force of the contact, and the locking is maintained by the restoring force in the direction facing the contact.

On the inner surface of the head locking piece 13a of one of the parallel elastic contact pieces 12 and 13, for example, the parallel elastic contact piece 13, an arc-shaped protrusion 13f directed toward the inner surface of the other head locking piece 12a is provided. There is a slight gap 17 between the top surface of the projection 13f and the inner surface of the head locking piece 12a.
exists or is in contact with it. The interval 1
The parallel elastic contact pieces 12 and 13 have a degree of freedom by an amount of 7, making it possible to finely adjust the posture when inserting a wiring board with a constant thickness. The protrusion 13f moves by the allowable distance 17 and comes into contact with the inner surface of the opposing head locking piece 12a, thereby preventing the protrusion from falling to the side, that is, shifting to one side.

As shown in FIG. 3, the protrusions 13f are arranged oppositely between the contacts in one row and the contacts in the other row. That is, the parallel elastic contact pieces 13 of the contacts in one row in which the protrusions 13f are formed and the parallel elastic contact pieces 12 in the contacts in the other row in which the protrusions are not formed.
The two rows of parallel elastic contact pieces 13, 13 on which the protrusions 13f are formed do not correspond to each other.

The offset prevention protrusion 13f (the top surface which is the contact surface of the protrusion 13f) is arranged in front of the tip edge of the head locking piece 13a. That is, it is placed at a position below the jaw of the locking claw 13b.

By arranging the offset prevention projection 13f, a projection sliding surface 12f is formed on the inner surface of the other head locking piece 13a from a portion facing the offset prevention projection 13f to the tip edge. Protrusion 1 for preventing deviation
3f is allowed to slide on the sliding surface 12f.

Figures 6 and 7 show the above-mentioned offset prevention protrusion 13f.
An example is shown in which the composition was prepared by applying pressure.

If the deviation prevention protrusion 13f is formed by ordinary punching, burrs etc. that are harmful to sliding are likely to occur, and the punching die will be damaged early. 6 and 7, the parallel elastic contact piece 13 is punched out without any protrusions like the other parallel elastic contact piece 12, and pressure is applied to the part of the parallel elastic contact piece adjacent to the position where the protrusion 13f is to be formed. (16 is the part where the pressure is applied) to promote the expansion of the base material and produce the above-mentioned protrusion 13f. The protrusions 13f formed by the blowing pressure eliminate the problems of burrs and mold damage caused by punching. As an example, as shown by the dotted line in FIG. 7, the thickness of the protrusion 13f is made thicker than the parallel elastic contact piece 12 opposing it by means of blow pressure to enlarge the contact area.

Effects of the invention As mentioned above, the conventional wiring board connector has a structure in which the bifurcated spring contact maintains the distance between the parallel elastic contact pieces by abutting the protrusions and prevents the wiring board from shifting. There is a risk that the protrusions may slip down due to displacement due to time or other external factors, resulting in a problem in which the intended purpose cannot be achieved. The present invention completely eliminates this drawback.

In addition, the conventional method had a technical and economical disadvantage in that a pair of minute protrusions had to be punched and formed at a small distance between contact pieces, but the present invention has a single protrusion for preventing deviation, so it is more effective. If the protrusions can be made larger, damage to the punching die can be suppressed as much as possible, and the protrusions are formed by blowing pressure, the problems of early damage to the die and poor sliding due to burrs can be completely solved.

Furthermore, since the inner surface of the mating contact piece to be brought into contact with a single protrusion becomes a flat surface, there is no difficulty in matching the abutment points between the protrusions, and there is no problem of poor abutment, and manufacturing is easy.

The effects of the present invention will be explained based on FIGS. 4 and 5, which are illustrated in comparison with FIGS. 8 and 9 of conventional products.

As described above, in the present invention, the deviation prevention protrusion 13f is formed only on one of the parallel elastic contact pieces 13, and this is arranged in front of the tip edge of the head locking piece 13a, and inside the opposing elastic contact piece 12. A sliding surface 12f is formed on the side surface. Therefore, as shown in FIG. 4, the protrusions 13f are allowed to slide on the sliding surface 12f, and the protrusions 13f are allowed to slide on the sliding surface 12f without causing problems such as slippage or engagement due to abutment between the protrusions, and are kept in the normal position while slightly sliding when the wiring board is inserted. It is possible to self-restore. Also, the sliding surface 12f due to the arrangement of protrusions
With this formation, the worst situation in which the protrusion 13f comes off from the edge of the head locking piece 12a of the elastic contact piece 12 can also be avoided.

Further, in the present invention, even when the projection 13f moves, the gap between the parallel elastic contact pieces 12 and 13 does not narrow below a certain limit, and the contact interval with the opposing surface can be maintained constant. Therefore, both parallel elastic contact pieces 12, 13
Even if there is sliding, it always prevents excessive deviation and maintains a proper posture in the direction of insertion of the wiring board. Furthermore, as shown in FIG. 5, even if only one parallel elastic contact piece 13 is deflected to the protrusion abutting position and the other parallel elastic contact piece 12 is deflected, the deflection may occur in the opposite direction to that shown in the figure. Even if this occurs, the locking pawl 13b or 12b for preventing forward tipping will not become unlatched from the locking wall 15c or be twisted, as in the case of the conventional slipping between the protrusions shown in FIG. This ensures that the distance is maintained without any problems. When the locking claw 13b is disengaged, the head locking piece of the parallel elastic contact piece protrudes into the wiring board insertion groove.
This makes it impossible to insert the board, resulting in damage to the contacts.
The present invention reliably prevents such a situation and does not cause disengagement due to the above-mentioned deviation, and therefore prevents the contact surfaces 12c, 1 from becoming disengaged due to the disengagement.
3c can solve the problem of mismatch in the running surface, make the contact of the parallel elastic contact pieces of each contact uniform, smooth the insertion and removal of the wiring board, and make the advantages of the bifurcated spring structure contact more effective. Can be used.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a contact showing an embodiment of the present invention, Fig. 2 is a vertical sectional view of the contact, and Fig. 3 shows a wiring board connector in which the contact is implanted with a pair of opposing contacts. FIGS. 4 and 5 are enlarged plan views showing the functions and effects of the same connector with contacts on one row side, and FIG. FIG. 7 is a cross-sectional view taken along the line A-A in FIG. FIG. 3 is a plan view of the connector. 11... Connector, 12, 13... Parallel elastic contact piece, 12a, 13a... Head locking piece, 12c, 1
3c...contact surface, 312e, 13e...locking surface,
13f... Protrusion for preventing deviation, 14... Wiring board, 15... Connector housing, 15d... Wiring board insertion groove, 16... Place for applying pressure.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A large number of contacts are arranged facing each other along the length of the wiring board insertion groove of the connector housing, and the contacts are connected to each other on the bottom side of the insertion groove. A pair of parallel elastic contact pieces having tips on the entrance side of the groove are provided, and the contact facing surface of the parallel elastic contact pieces is used as a contact surface, and a contact surface is provided at the tip end of the parallel elastic contact pieces opposite to the contact facing surface side. Forming head locking pieces that can be bent in the direction,
In the wiring board connector configured to prevent the double-headed locking piece from falling forward by locking the double-head locking piece to a locking wall of the connector housing formed opposite to the locking piece on the side facing the contact. A projection toward the inner surface of the other head locking piece is provided on the inner surface of one of the head locking pieces of the parallel elastic contact pieces to prevent deviation. The head locking piece is placed in front of the tip edge of the head locking piece, and a protrusion sliding surface is formed on the inner surface of the other head locking piece from a portion facing the deviation prevention protrusion to the tip edge. Characteristic wiring board connector. (2) Utility model registration claim 1, characterized in that the deviation prevention protrusion is formed by applying pressure to one of the parallel elastic contact pieces adjacent to the position where the protrusion is to be formed. The idea described in section.