JP2570904B2 - connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a connector in which a contact is inserted into a contact insertion hole of a housing, with the object of providing a connector having an improved fixing force between the contact and the housing. A notch for locking formed by projecting part of both sides of an intermediate part extending from the plug part at one end in the width direction of the plate and a part of the surface of the metal plate at a position shifted forward from the notch. A contact including a cut-and-raised locking projection; one or more cylindrical holes for loosely fitting a plug portion of the contact; and a contact insertion hole communicating with the cylindrical hole and inserting the contact. A contact portion formed by notching a part of a hole wall of the contact insertion hole to lock the protrusion, and a contact when the protrusion of the contact passes through the contact insertion hole just before an entrance of the contact insertion hole. A housing made of an insulating resin having a space for releasing its own bending and guiding the insertion, and a groove for loosely fitting the cut portion of the contact and forcibly engaging and locking the position where the projection is locked to the paragraph. And

[Industrial applications]

The present invention relates to a connector, and more particularly to a connector having an improved fixing force between a contact and a housing.

In general, a tensile force and a pressing force are alternately and repeatedly applied to a contact of a connector used for electrically connecting between printed circuit boards and devices such as electronic devices.

Therefore, in order to improve the durability and reliability of the connector, it is indispensable to prevent the contact from easily coming out of the contact insertion hole of the housing.

[Conventional technology]

Next, a conventional connector will be described with reference to FIG. 2 (a) is a perspective view of the connector, FIG. 2 (b) is a sectional view taken along line AA of the connector, and FIG. 2 (c) is a view for explaining the conventional connector. FIG. 4D is a top view sectional view schematically showing a state where the contact and the housing are fixed, FIG. 4D is a perspective view showing a state where the contact is inserted into the housing, and FIG. 4E is a state where the contact is inserted into the housing. It is a top view sectional view showing a state.
In this specification, the same parts, the same materials, and the like are denoted by the same reference numerals throughout the drawings.

In the conventional connector shown in FIG. 1A, a metal plate, for example, a phosphor bronze plate having elasticity is press-cut and molded to form the other end of the contact 21 into a sheath. After press-fitting into a contact insertion hole 22a of a housing 22 formed by molding PBT (polybutylene terephthalate) having elasticity, an intermediate portion is bent into an L-shape (FIGS. 2B and 2B). c)).

Contact 2 to contact insertion hole 22a of housing 22
When the contact 21 is pressed into the contact insertion hole 22a in the direction indicated by the arrow B in FIGS. 4D and 4E, the contact 21 and the inner wall of the contact insertion hole 22a of the housing 22 are elastically deformed. As shown in FIG. 4C, a concave cut-out portion provided by partially cutting both sides of the contact 21 is provided.
While the inner wall of the contact insertion hole 22a enters the 21a,
Both sides of the cut portion 21a of the contact 21 are cut into the inner wall of the contact insertion hole 22a.

The width W of the contact 21 at the portion to be inserted into the contact insertion hole 22a of the housing 22, as shown in FIG.
c is configured to be slightly wider than the width Wh of the contact insertion hole 22a.

[Problems to be Solved by the Invention] As described above, the contact 21 is fixed to the housing 22 by the inner wall of the contact insertion hole 22a elastically deformed at the cut portion 21a of the contact 21 as shown in FIG. 2C. , And both sides of the cut portion 21a of the contact 21 cut into the inner wall of the contact insertion hole 22a.

In this state, the fixing force of the contact 21 to the contact insertion hole 22a of the housing 22 is substantially proportional to the thickness of the contact 21.

Therefore, in the conventional connector, the connector 21
There is a problem that as the thick plate becomes thinner, the fixing force between the connector 21 and the housing 22 necessarily decreases.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a connector having an improved fixing force between a contact and a housing.

[Means for solving the problem]

The above-mentioned object is, as shown in FIG. 1, a locking notch 21a formed of a pin-shaped metal plate, and formed by projecting portions on both sides of an intermediate portion extending from a plug portion at one end in a plate width direction, A contact 11 having a locking projection 11a formed by cutting and raising a part of the surface of the metal plate at a position displaced forward from the cut portion 21a, and a plurality of loosely fitting plug portions of the contact 11. A cylindrical hole and a contact insertion hole 12a which communicates with the cylindrical hole to insert the contact 11, and a step 1 for locking the projection 11a by cutting out a part of a hole wall of the contact insertion hole 12a;
2b and before the entrance of the contact insertion hole 12a, the space 11 that guides the insertion while releasing the bending of the contact intermediate portion when the protrusion 11a of the contact 11 passes through the contact insertion hole 12a and the cut portion 21a of the contact 11 This is achieved by a connector comprising an insulating resin housing 12 having a groove for press-fitting a position where the loosely fitting projection 11a is locked to the paragraph section 12b to engage and lock.

(Operation)

As shown in FIG. 1, the connector according to the present invention has a rigidity that hardly elastically deforms by forming a shape of a lowering tooth by cutting and raising a part of the surface of the contact middle part in addition to the conventional locking notch 21a. By adding the high protrusion 11a, the protrusion 11a hardly undergoes elastic deformation when passing through the contact insertion hole 12a, and the contact intermediate portion bends as shown by the broken line in FIG. 1 (c). A space (gap) for releasing this elastic bending and guiding the insertion is provided in the contact insertion hole.
Providing just before the entrance of 12a, and providing a paragraph portion 12b in which a part of the contact insertion hole 12a is cut out and the projection 11a is locked, the projection 11a can be easily inserted right up to the paragraph portion 12b, Only the part immediately before the part 12b is momentarily press-fitted and passed therethrough, and the protrusion 11a that has passed can be locked to the paragraph part 12b, and the bending of the contact middle part at the time of press-fitting can be released to the space part, so that the press-in resistance can be reduced. .

〔Example〕

Hereinafter, a connector according to an embodiment of the present invention will be described with reference to the drawings.

1A and 1B are views for explaining a connector according to an embodiment of the present invention. FIG. 1A is a perspective view of the connector, FIG. 1B is a cross-sectional view taken along line AA, and FIG. It is a principal part expanded side sectional view which shows the state which cut-and-raised latches on a paragraph part typically.

FIG. 1A shows the appearance of a connector according to an embodiment of the present invention.
As shown in FIG. 2, this is the same as the conventional connector shown in FIG. 2 (a).

As shown in FIGS. 1 (a) and 1 (b), the connector according to one embodiment of the present invention has a contact 11 fixed to a contact insertion hole 12a of a housing 12 made of an insulating resin. The contact 11 is a pin-shaped metal plate, and a notch 21a for locking formed by extending a part of an intermediate portion extending from the plug portion at one end in the width direction of the plate (see FIG. 2 of the related art).
And a locking projection 11a formed by cutting and raising a part of the surface of the metal plate at a position displaced forward from the cut portion.

The housing 12 has a plurality of cylindrical holes into which the contact plugs are loosely fitted, as in the conventional housing 22, and, as shown in FIGS. A contact insertion hole 12a for inserting the contact insertion hole 12a, a paragraph portion 12a for locking a projection 11a formed by cutting out a part of a hole wall of the contact insertion hole 12a, and a contact insertion hole
Cut-and-raise (projection) 11a of contact 11 just before entrance of 12a
The space for guiding the insertion and the bending of the contact intermediate portion (indicated by the broken line in FIG. 9C) when the contact 11 passes through the contact insertion hole 12a, and the cut portion 21a of the contact 11
And a groove for press-fitting the position where the protrusion 11a is locked to the paragraph section 12b to engage and lock. Further, as shown in FIG. 2C, the cut-and-raised portion 11a is press-fitted in the direction of arrow B with the inclined surface 11b of the cut-and-raised portion 11a pressed into the direction of arrow B, and the cut-and-raised portion 11a of the contact 11 is engaged with the paragraph portion 12b of the housing 12. It is.

When the contact 11 passes through the contact insertion hole 12a of the housing 12, the cut-and-raised contact 11a of the contact 11 is elastically deformed and bent as shown by a broken line in FIG. Then, the deflection is released to the space, and only the portion immediately before the paragraph 12b is momentarily press-fitted and finally passed. When the cut-and-raised (projection) 11a reaches the paragraph 12b of the housing 12, the original portion is returned. This is done by returning to the state.

As described above, the contact includes the conventional notch and the rigid projection, the housing includes the conventional contact insertion hole communicating with the cylindrical hole into which the plug portion is loosely fitted, and includes the contact insertion hole. A notch formed paragraph portion and a space portion for guiding the insertion while releasing the bending of the contact middle portion and a groove for engaging the notch portion at the position where the projection is locked to the paragraph portion as in the conventional case, and locking. Therefore, even if the contact is made of a metal plate which is thinner and more flexible than the conventional one, the fixing force (locking force) with the housing can be improved, and the projection itself can be formed relatively small, so that the connector itself can be downsized. . Further, when assembling the multi-connector, the press-fit resistance when the plurality of contacts 11 are inserted all at once is reduced, so that the assembling can be facilitated.

〔The invention's effect〕

As is clear from the above description, according to the present invention, it is possible to provide a connector having an improved fixing force between the contact and the housing.

Therefore, an electronic device or the like employing the connector of the present invention can operate stably for a long period of time and maintain high reliability.

[Brief description of the drawings]

FIG. 1 is a view for explaining a connector according to an embodiment of the present invention, and FIG. 2 is a view for explaining a conventional connector. In the figure, 11 is a contact, 11a is a locking projection (cut and raised), 11b is a cut and raised slope, 12 is a housing, 12a is a contact insertion hole, and 12b is a paragraph section.

Claims (1)

(57) [Claims] 1. A locking notch made of a pin-shaped metal plate and formed by projecting portions of both sides of an intermediate portion extending from a plug portion at one end in the width direction of the plate, and displacing forward from the notching portion. With a locking projection formed by cutting and raising a part of the surface of the metal plate at one of the positions, one or more cylindrical holes for loosely fitting the plugs of the contacts, and A contact insertion hole that communicates with the contact, a step portion that cuts a part of a hole wall of the contact insertion hole and locks the protrusion, and a protrusion of the contact is provided in front of an entrance of the contact insertion hole. A space for guiding the insertion while releasing the bending of the contact middle portion when passing through the contact insertion hole, and a position where the cut portion of the contact is loosely fitted and the projection is locked to the paragraph portion by press-fitting to engage and lock. With a groove to A connector comprising: a housing made of an insulating resin;