JP2533098Y2 - Push-fit connector - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention attaches a pin-shaped contact element to an insulative housing of a connector, and a protruding press-fit contact portion of the contact element, that is, a hole engaging portion, extends from a bottom side of the insulated housing. The present invention relates to a fitting connector.

[0002]

2. Description of the Prior Art Multi-contact push-fit connectors are known which are arranged in a matrix in close contact with several rows, for example 48 or 96 contact elements, which are inserted into plated holes in a printed circuit board. A so-called C-press solderless contact is particularly well known as a single push-fit contact element. This C-press solderless contact was first disclosed in U.S. Pat. No. 4,017,143. The C-shaped resiliently flexing hole-engaging portion of the C-press solderless contact ensures good contact with the printed circuit board with uniform support pressure over the entire contact area.

One problem exists when simultaneously inserting all contact elements of a multi-contact push-fit connector into respective holes of a printed circuit board. That is, a strong insertion force must be applied to the insulating housing in which the contact elements are held. Since the insulating housing is usually made of plastic, the insulating housing may be torn or the contact elements may be deformed unless special precautions are taken.

Currently, the tools required for the insertion of such a push-fit connector are inserted into the insulated housing through an opening running in parallel with the contact element, and into the shoulder formed on the contact element in the insulated housing. (See, for example, Japanese Utility Model Laid-Open No. 62-140885). The force applied to the tool via the shoulder is transmitted to the contact element. The tool may simultaneously abut the top surface of the insulating housing. In this way, an insertion force can be applied to the contact element and the insulating housing.

If the insertion force is applied via a flat tool only to the top surface of the insulated housing, the contact elements must be insulated by the insulated housing so that the required force can be transferred.
It is important to engage over a sufficiently large area. Such a large engagement area of the contact elements in the insulating housing is disadvantageous for the demand for a constantly miniaturizing such a push-fit connector. Furthermore, despite the large engagement area of the contact elements in the insulating housing, tearing of the insulating housing may still occur. An engaging recess is formed in the insulating housing so that the protrusion of the contact element mounted on the insulating housing engages with the engaging recess (particularly when a pin connector is fitted into the contact element), and the contact element and the insulating housing are formed. Is disclosed in Japanese Patent Application Laid-Open No. 57-84578. However, the technology related to this connector is based on the idea of inserting the contact element into the plated hole of the printed circuit board according to the present invention.
It does not provide any technical ideas to solve the above problems.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to improve a multi-contact push-fit connector so as to prevent the insulating housing from tearing during the push-fit.

[0007]

SUMMARY OF THE INVENTION A push-fit connector according to the present invention, made with the above object, is a push-fit connector including an insulating housing having a top surface and a bottom surface, the connector being mounted in the insulating housing. Comprising at least one contact element for insertion into a hole in a printed circuit board,
An upper portion of the contact element includes a pair of opposing arms, the contact element including a hole engaging portion extending from a bottom surface of the insulative housing, the arm including a hole engaging portion toward the top surface of the insulative housing. The inner wall of the opening formed from the top surface to the bottom surface of the insulating housing is held in frictional engagement by an interference fit installed between the pair of arms, and the contact element has A push-fit connector characterized in that an upper shoulder facing the top surface in the opening is formed in the middle portion, and the upper end surface of the arm is flush with the top surface of the insulating housing. is there.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The pin-shaped contact element 2 of the present invention shown in the attached FIG. 1 includes an upper part including a pair of parallel arms 6 opposed to each other, connecting these two arms 6, and an upper shoulder 3.
And a lower portion having a C-shaped section 4 ending in a tapered conical section 8. Top 10
Interference fit 5 in an opening 9 formed from the top surface 10 to the bottom surface 11 of the insulating housing 1 having the
Via the contact element 2 engages the insulating housing 1. It should be understood that the insulating housing 1 has a plurality of openings 9 to accommodate a number of contact elements 2.

As in the case of a conventional push-fit connector of this type, the contact element 2 is first inserted into the opening 9 from the top surface 10 by applying an insert (not shown) to the upper shoulder 3. . The contact element 2 is held in the insulating housing 1 by fitting the interference fit 5 between the pair of arms 6 opposed to each other and bringing the inner wall of the opening 9 and the outer wall of the arm 6 into frictional engagement. You. This can prevent the shape of the contact element 2 from becoming complicated,
Further, insertion into the insulating housing 1 can be easily performed. When the contact element 2 enters the insulating housing 1, the C-shaped part exits from the bottom surface 11 of the insulating housing 1. According to the present invention, the length of each arm 6 is determined such that the upper end surface 7 of each arm 6 is flush with the top surface 10 of the insulating housing 1. Top surface 1 of insulating housing 1
When the push-fit connector is inserted into the plated hole of the printed circuit board, a flat insertion tool (not shown) is applied to the top surface 10 so that the push-fit connector is inserted into the hole of the printed circuit board. Contact element 2 can be inserted. With this arrangement, the insertion force exerted by the flat insertion tool is transferred to each contact element 2 via the arm 6 and the contact engagement area where the arm 6 frictionally engages in the opening 9 of the insulating housing 1 Since the insertion tool does not receive the insertion force applied to the insulating housing 1, the insulating housing 1 is prevented from tearing.

[0010]

As described above in detail, according to the present invention, it is possible to provide a multi-contact push-fit type connector which can prevent the insulating housing from being split when it is pushed into a printed circuit board. Also, since the contact part is inserted into the insulated housing and the interference fit is inserted into the opposite part of the arm so that it can be frictionally engaged with the inner wall of the housing, the shape of the contact element can be simplified. And the operation of inserting into the insulating housing can be simplified. Accordingly, there is an effect that it is possible to cope with downsizing. Furthermore, since the connection with the printed circuit board may be a flat insertion tool that abuts on the top surface of the insulating housing, there is an effect that the insertion equipment can be simplified.

[Brief description of the drawings]

FIG. 1 shows a single contact element inserted into an insulating housing adapted to accommodate a plurality of contact elements.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulated housing 2 Contact element 3 Upper shoulder 4 C-shaped section 5 Interference fit 6 Arm 7 Upper surface 8 Conical part 9 Opening 10 Top surface of insulated housing 11 Bottom surface of insulated housing

Claims (2)

(57) [Scope of request for utility model registration] 1. A push-fit connector comprising an insulating housing (1) having a top surface (10) and a bottom surface (11), comprising at least one contact element (2) mounted in the insulating housing (1) and inserted into a hole in a printed circuit board; A pair of arms 6 opposed to each other is provided on the upper part of the contact element 2.
The contact element 2 includes a hole engaging portion extending from the bottom surface 11 of the insulating housing 1 and the arm 6
Extends from the hole engaging portion toward the top surface 10 of the insulating housing 1 and is provided between the pair of arms 6 with respect to the inner wall of the opening 9 formed from the top surface 10 to the bottom surface 11 of the insulating housing 1. The upper shoulder 3 which is held in frictional engagement by the interference fit 5 and which faces the top surface 10 in the opening 9 in the middle of the contact element 2 is formed. A push-fit connector characterized in that the upper end surface (7) is flush with the top surface (10) of the insulating housing (1). 2. The push-fit connector according to claim 1, wherein a cross section of the hole engaging portion is C-shaped.