JPH0438473Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an improvement of a printed circuit board connector that electrically connects circuits wired on a printed circuit board.

(Prior Art) As a means of electrically connecting circuits wired on a printed circuit board, a printed circuit board connector that is mounted directly on a circuit board has traditionally been used for ease of removal. There is.

In this printed circuit board connector, the tines of the contacts are soldered to the printed circuit board, and connecting pins attached to another printed circuit board are inserted into the connector and come into contact with the contacts of this connector. Some devices are configured to electrically connect circuits on a printed circuit board via connection pins and contacts.

A conventional example of a printed circuit board connector constructed in this manner is, for example, one described in Japanese Patent Publication No. 10555/1983, and the prior art will be described below with reference to this example.

FIG. 5A is a perspective view showing the inside of the conventional printed circuit board connector, FIG. 5B, and FIG.
FIG. C is a diagram showing the state of the conventional contact shown in FIG. 5A after being bent (the tine portion 13b is before being bent) and before being bent. FIG. 5C shows a state in which a plurality of contacts are arranged.

This printed circuit board connector 11 is composed of a housing 12 and contacts 13 inserted into the housing 12.

This contact 13 is usually, for example, the fifth C.
As shown in the figure, this 5C is made from one sheet of conductive material.
A large number of pieces are cut out side by side in the shape shown in the figure, and after being cut out, they are bent into the shape shown in Fig. 5B. Thereafter, the contacts 13 bent into this shape are inserted into the housing 12, and the tine portions 13b are bent to form the connector 11 shown in FIG. 5A.

When the connecting pin 15 attached to the printed circuit board 14 is inserted through the hole 12a of the housing 12, the contact 13
5, and a tine portion 13b protruding from the housing 12 to the outside. The tine portion 13b is inserted into a hole provided in a printed circuit board (not shown) and soldered. By connecting in this way, the circuit wired on the printed circuit board 14 and the tine section 13 are connected.
A circuit wired to the printed circuit board to which b is soldered is electrically connected via the connecting pin 15, the contact portion 13a, and the tine portion 13b.

When the contact 13 is inserted into the housing 12, the outer edge 1 of the contact portion 13a of the contact 13
When the entirety of 3c comes into contact with the inner wall of the housing 12,
The friction between the outer edge 13c and the inner wall of the housing 12 may reduce the elasticity that clamps the inserted connecting pin 15, resulting in poor contact between the contact portion 13a and the connecting pin 15. Only a portion 13d of the housing 13c is formed so as to be in contact with the inner wall of the housing 12, thereby preventing the above-mentioned poor contact from occurring. For this reason, for example, as shown in FIG. 5C, when a large number of contacts 13 are cut out from a single sheet of conductive material in a row adjacent to each other laterally, gaps 16 are formed between adjacent contacts 13. .

(Problem to be solved by the invention) In the conventional example described above, if the length of the connecting pin 15 attached to the printed circuit board 14 is long, for example, the tip 15a' of the lower connecting pin 15' in FIG. The tine portions 13b' of the contacts contact each other, causing an electrical short circuit between the upper and lower contacts, which should normally be insulated, resulting in malfunction of the circuit,
There is a problem in that there is a risk of circuit damage, etc. Therefore, sufficient attention should be paid to the length of the connecting pin, and the length should be kept within the range where there is no risk of contact as mentioned above while reaching the contact portion 13a. The need arose.

In view of the above-mentioned problems, the present invention has been developed to reliably prevent the above-mentioned contact even if the length of the connecting pin is somewhat long, and to eliminate the risk of circuit malfunction or circuit damage caused by this contact. The purpose is to provide a board connector.

(Means for Solving the Problems) The printed circuit board connector of the present invention includes a housing and a contact inserted and held in an insertion hole of the housing, and the contact has a tine portion connected to the printed circuit board and a mating connection. A connector for a printed circuit board having a contact portion that comes into contact with a pin, wherein the contact has a pair of first and second wall portions rising from each of the front and rear side edges of the base, and the contact portion has a The first wall has a shape extending rearward while approaching each other so as to sandwich the connecting pin, and the first and second walls have free ends that engage with the inner wall of the insertion hole of the housing. The second wall has a substantially wave-shaped engaging portion extending transversely to the axis of the contact to prevent the connecting pin from entering excessively, and the inner wall extends from both side edges of the base. It is characterized by having a protrusion that protrudes so as to be engaged with it.

(Function) As mentioned above, the printed circuit board connector of the present invention is provided with a wall portion behind the contact portion of the contact that prevents insertion of the connecting pin, so even if the length of the connecting pin is long, This wall prevents it from being inserted any further into the contact, thus preventing it from coming into contact with other contacts. Since this wall portion is provided on a contact that originally comes into contact with the inserted connection pin, malfunction of the circuit will not occur even if the tip of the connection pin comes into contact with the wall portion.

In addition, this wall is provided so that the tip of the connecting pin inserted into the hole provided in the housing comes into contact with it, so when assembling this connector, an assembly jig is used to pass the tip of the connecting pin inserted into the hole provided in the housing. By pressing on this wall, the contact can be inserted into a predetermined position within the housing.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a sectional view of an embodiment of the printed circuit board connector of the present invention.

This printed circuit board connector 1 is comprised of a housing 2 and contacts 3 and 3' inserted into the housing 2. This contact 3,
3' are usually arranged in large numbers in a direction perpendicular to the paper plane of this drawing.

The contacts 3, 3' have a pair of first wall parts 3k, 3k' and a pair of second wall parts 3l, 3l' rising from the front and rear of the base parts 3a, 3a', respectively, and the front first wall part 3k, 3k' are the connecting pins 4,
A pair of contact parts 3b, 3 that elastically contact 4'
has b′. Here, the front means the direction facing the mating connection pins 4, 4', and the rear means the direction opposite thereto. The contacts 3, 3' stand up from the bases 3a, 3a' and both side edges of the bases 3a, 3a', and when the connecting pins 4, 4' are inserted from the holes (insertion holes) 2a provided in the housing 2, A pair of contact portions 3b, 3 elastically clamp the connecting pins 4, 4' and contact the connecting pins 4, 4'.
b', contact portion 3b in the insertion direction of the connecting pins 4, 4';
The connection pins 4, 4' are inserted into the walls 3c, 3c' provided on the back side of the board 3b' and are inserted into the holes 5a provided in the printed circuit board 5, and are soldered to the printed circuit board 5. The tine portions 3d and 3d' are formed continuously with the base portions 3a and 3a'. By providing the contacts 3, 3' with the top portions 3c, 3c' in this way, the connecting pins 4,
4' is on the back side of this wall 3c, 3c' (on the right side of the figure)
It is never inserted into . Therefore, the connection pin 4' is reliably prevented from coming into contact with the tine portion 3d, and circuit malfunctions and circuit damage caused by this contact are reliably prevented.

2A and 2B are a plan view and a front view, respectively, of the contact 3 shown in FIG. 1 before it is inserted into the housing 2, and FIG. 3A,
FIG. 3B shows the contact 3' shown in FIG.
FIG. 2 is a plan view and a front view, respectively, showing the state before being inserted into the housing 2. FIG. Components that are the same as those shown in FIG. 1 are designated by the same numbers, and their explanation will be omitted.

In the contact 3 shown in FIGS. 2A and 2B, the tine portion 3d is provided on the opposite side to the insertion direction of the connecting pin 4 shown in FIG. 1, and the contact 3' shown in FIGS. 3A and 3B is Although a tine portion 3d' is provided on the insertion direction side of the connecting pin 4, portions unrelated to this tine portion will be described together with respect to both the contact 3 and the contact 3'.

When assembling the connector 1, the contacts 3 and 3' are inserted into the housing 2 from the right side in FIG. 1 with the left side shown in FIGS. 2A to 3B first, and are arranged at predetermined positions in the housing 2. , and then the tine portions 3d, 3d' are bent. During this insertion, an assembly jig (not shown) pushes the walls 3c, 3c' from the right side in the figure, thereby causing the contacts 3,
3' is inserted into the housing 2. in this way,
When assembling the connector, the walls 3c and 3c'
It also has the role of receiving the force of the assembly jig that pushes the contacts 3, 3' into the housing 2. In the vicinity of the walls 3c, 3c' of this contact, the base 3a,
Protrusions 3e and 3e' are provided that protrude from both sides of 3a', and these protrusions 3e and 3e' bite into the inner wall of the housing 2, and the contact inserted in a predetermined position is fixed in that position. contact pin 4,
4' is inserted and touches the walls 3c, 3c',
The contact never moves from its position.

In addition, in these contacts 3, 3', the outer edges 3f, 3f' of the pair of contact parts 3b, 3b' partially have waveforms 3g, 3g', so that these contacts forming the engaging part Only the protrusions with waveforms 3g and 3g' are housing 2.
The entire outer edges 3f, 3f' are in contact with the inner wall 2b of the housing 2, and the outer edges 3f, 3f' are in contact with the inner wall 2b of the housing 2.
This prevents the friction between f' and the inner wall 2b from reducing the elasticity that clamps the connecting pin 4, thereby preventing contact failure from occurring. Further, in this embodiment, the wall portion 3
Since the corrugated protrusions 3h, 3h' constituting the engaging portions are also formed in c, 3c', the entire outer edges 3f, 3f' of the contact portions 3b, 3b' are connected to the inner wall 2b of the housing 2.
Contact with other people is more reliably prevented.

FIGS. 4A and 4B are diagrams showing the contact 3 and the contact 3', respectively, cut out from a conductive material. This shows the state before it is bent, and the same numbers are given to the parts corresponding to the respective parts of the contacts 3, 3' shown in FIGS. 1 to 3B when the contacts are bent, and the explanation thereof will be omitted.

As shown in the figure, a large number of contacts 3, 3' are cut out from a single sheet of conductive material in a row adjacent to each other laterally. Here, the outer edges 3f of the contact portions 3b, 3b',
Part of the waveforms 3g and 3g' of 3f' complement each other at the boundaries of adjacent contacts, so that contacts 3 and 3' can be cut out without waste. By creating shapes that complement each other in this way, the inventor estimates that the
The same number of contacts can be cut out using 45% the area of conductive material, significantly reducing costs.

The carriers 3i, 3i' connected to the bases 3a, 3a' of each contact are designed to automatically transport a large number of contacts 3, 3' without separating them during cutting, bending, etc. processes. 3', and the holes 3j, 3 are separated from each contact 3, 3' before being inserted into the housing 2, and are provided in the carriers 3i, 3i'.
j' is used to determine the conveyance pitch in the automatic conveyance described above.

(Effects of the Invention) As explained above in detail, the printed circuit board connector of the present invention includes a pair of first and second wall portions on the front and rear side edges of the base of the contact, and the contact portion The free end of each of the first and second walls is provided with a substantially corrugated engaging portion that engages with the inner wall of the insertion hole of the housing, and the second wall is provided with a substantially corrugated engaging portion that engages with the inner wall of the insertion hole of the housing. The structure includes protrusions that protrude from both sides of the wall and base to prevent the connection pin from entering more than necessary.
It has the following effects.

That is, since the engaging portions are provided at the free ends of the front and rear first and second wall portions, the contact can be fixed in the insertion hole extremely stably and reliably. The contact shape only needs to be formed on three sides, and there is no need for a frame shape, so less material is required.

Since the rear of the contact portion is a free end, there is no need to provide an insertion guide for the mating connection pin on the front surface, and the total length of the contact can be shortened and miniaturization is possible. Since no insertion guide is required, materials can also be saved.

Since the engaging portion has a wavy shape, it bites into the inner wall of the insertion hole sharply, ensuring reliable attachment. In the case of material extraction, adjacent contacts can complement each other, so it is possible to obtain a large number of contacts with a small amount of material.

The protrusion protruding from the base has extremely high rigidity and can prevent the contact from moving laterally within the insertion hole, and together with the above-mentioned engaging portion, can reliably fix the contact.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the printed circuit board connector of the present invention, and FIGS. 2A and 2B are
The upper contact shown in the figure is a plan view and a front view, and FIGS. 3A and 3B are a plan view and a front view, respectively, of the lower contact shown in FIG. The figure shows a state in which the upper and lower contacts shown in FIG. 1 are cut out of a conductive material, and FIG. 5A shows the inside of a conventional printed circuit board connector. FIG. 5B and FIG. 5C are diagrams showing the state of the conventional contact shown in FIG. 5A after and before bending, respectively. 1... Printed circuit board connector, 2... Housing, 2a... Insertion hole, 2b... Inner wall, 3, 3'
...Contact, 3a, 3a'...Base, 3b, 3
b'...Contact part, 3c, 3c'...Wall part, 3d, 3
d'...Tine part, 3e, 3e'...Protrusion, 3g, 3
g', 3h, 3h'... Waveform, 3k, 3k'... First wall part, 3l, 3l'... Second wall part, 4, 4'... Connection pin, 5... Printed circuit board.

Claims (1)

[Claims for Utility Model Registration] A utility model for a printed circuit board comprising a housing and a contact inserted and held in an insertion hole of the housing, the contact having a tine portion connected to a printed circuit board and a contact portion contacting a mating connecting pin. In the connector, the contact has a pair of first and second walls rising from both front and rear edges of the base, and the contact portion clamps the connecting pin from the first wall. The first and second wall portions have substantially wave-shaped engaging portions at their free ends that engage with the inner wall of the insertion hole of the housing, and The second wall portion includes a wall portion extending transversely to the axis of the contact to prevent the connecting pin from entering excessively, and a protrusion protruding from both side edges of the base portion so as to engage with the inner wall. Features of printed circuit board connectors.