JP2552743Y2 - Electrical connector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector, and more particularly to an electrical connector in which a housing lance for holding a contact (terminal) inserted into a contact receiving cavity of an insulating housing is formed integrally with the insulating housing.

[0002]

2. Description of the Prior Art Receptacle type connectors which generally use receptacle (female) type contacts have a plurality of contact receiving cavities formed in an insulating housing. A plurality of contacts are inserted into the contact receiving cavity from the rear surface (opposite the mating surface) of the insulating housing to the front surface (mating surface).

[0003] The contact inserted in this manner is:
A lance (piercing) formed in the contact itself or a housing lance formed in each contact receiving cavity of the housing is stably secured within each contact receiving cavity. That is, the contact is prevented from being pulled out in the direction opposite to the direction in which the contact is inserted.

One example of an electrical connector using a housing lance will be described in some detail. FIG.
It is principal part sectional drawing which shows an example of the conventional electrical connector disclosed by No. 72. FIG. 3B shows a part of the housing body 10 of the electrical connector together with the receptacle type contacts 12 inserted. FIG. 3A shows a part of the double lock member 15 inserted from the fitting surface of the connector housing body 10.

Although the housing body 10 may have a plurality of contact receiving cavities, one contact receiving cavity 11 is shown in FIG. The contact receiving cavity 11 is substantially rectangular and has a receptacle type contact 12 therein.
Is inserted from the rear surface of the housing body 10. An elastic housing lance 13 formed on the upper surface of the contact receiving cavity 11 engages with the shoulder of the contact 12 to hold the contact 12 so that it does not come off in the right direction in the drawing. An air gap 14 is formed between the housing lance 13 and the upper wall of the contact receiving cavity 11.

A double lock member 15 shown in FIG. 3A is mounted on the front surface of the connector housing body 10. The double lock member 15 is a plate-like body 17 having the same number of protrusions 16 as the contact receiving cavities 11 of the connector housing body 10. When mounted, each projection 16 is inserted into the space 14 above the contact receiving cavity 11 and presses the housing lance 13 toward the contact 12, so that the contact 12 can be securely held in the cavity 11.
The contact 1 is attached to the plate 17 of the double lock member 15.
2 has a tapered opening 18 at a position corresponding to the front end thereof, through which another tab (male) type contact (plug type contact) is inserted. By mounting the double lock member 15 on the connector housing body 10, the receptacle type connector is completed.

[0007]

However, as is apparent from the cross-sectional view of FIG. 3B, when the contact 12 is held in the contact receiving cavity 11, the projection of the housing lance 13 is formed by cutting out the upper surface of the receptacle type contact 12. It is only performed at one location in contact with the edge. Therefore, the holding of the contact 12 is not sufficiently stable.
When a large external force (tensile force) acts on the wire connected to the contact, the projection of the housing lance 13 may be sheared by the edge and the contact 12 may be pulled out. In particular, when the contact 12 is small and has multiple poles, instability of holding and insufficient strength may cause problems.

Accordingly, it is an object of the present invention to provide an electrical connector having a housing lance that can hold a contact in a contact receiving cavity of a housing body with sufficient stability and strength.

[0009]

SUMMARY OF THE INVENTION An electrical connector according to the present invention has a housing lance formed integrally with an insulating housing in a contact receiving cavity of an insulating housing, and a receptacle type contact inserted into the contact receiving cavity. It is to be engaged and held. The electrical connector has a main tapered surface formed at the center of the free end of the housing lance, and a pair of contact surfaces formed on both sides of the main tapered surface and in contact with both shoulders of the receptacle type contact. It is characterized by the following.

According to the electrical connector of the present invention, the contact is inserted into the contact receiving cavity from the rear surface of the insulating housing. When the contact is inserted, the cantilever-shaped housing lance is elastically bent upward, and when completely inserted, the housing lance returns to a normal state, and the main tapered surface of the housing lance and a pair of abutting surfaces are of a receptacle type. Make extensive contact with the contact shoulders. As a result, it comes into contact with a wider portion of the contact, so that high stability and high holding strength can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a sectional view of a main part of a preferred embodiment of an electrical connector according to the present invention. FIG. 1A is a part of a connector housing body (insulating housing) 20, and FIG. 1B is a cross-sectional view of a double lock member 30 inserted from a front surface (fitting surface) of the connector housing body 20. (C) is a sectional view showing a state where the housing main body 20 and the double lock member 30 of FIGS. 1 (A) and 1 (B) are combined and integrated.

Referring first to FIG. 1A, a housing body 20 has a plurality of contact receiving cavities, one of which is shown as a cavity 21. When viewed from the front (left) end, the cavity 21 has a substantially rectangular shape as shown in FIG. 2 (A), and has ridges 26 extending inward from both left and right side walls. A receptacle type contact 22, a part of which is indicated by a broken line, is inserted into a lower portion of the cavity 21. The ridge 26 serves as a guide (guide member) for the front end of the contact 22 having a substantially rectangular cross section to be inserted, and also has a function of preventing floating. The housing lance 24 projects downward from the upper wall surface of the cavity 21 with a gap 25, and engages with the shoulder 23 when the contact 22 is inserted.

On the other hand, the double lock member 30 is moved from the front plate 31 to the contact receiving cavity 21 of the housing body 20.
And a pressing member 33 that presses the front end upper wall portion of the contact 22 that is shorter and extends below the rod portion 32 and that is inserted into the space 25 between the housing lance 24 and the upper portion of the housing lance 24.

With the above structure, when the double lock member 30 is mounted after the contact 22 is inserted into a predetermined position in the contact receiving cavity 21 of the housing body 20, the housing lance 24 engages with the shoulder 23 of the contact 22 and the pressing member 33. Is inserted between the ridges 26 and the contact 2
2. Press the top wall of 2. As a result, the bottom surface of the contact 22 is completely pressed against the bottom surface 21a of the contact receiving cavity 21, and the contact 22 is held in a predetermined state. The plate-like portion 31 of the double lock member 30 has a tapered opening 34 at a position corresponding to the front end of the contact 22, so that a tab-type contact of a male connector can be inserted.

Next, FIG. 2B shows the freedom (front) of the housing lance 24 integrally formed with the insulating housing 20 in the contact receiving cavity 21 of the insulating housing 20 of the electrical connector of the present invention shown in FIG. It is a perspective view which shows an end part. An engagement portion with the contact 22 is formed at a free end of the housing lance 24. That is, it has a central main tapered surface 24a and a pair of relatively narrow contact surfaces 24b formed on both sides thereof. When the contact 22 is completely inserted into the contact receiving cavity 11, the contact surface 24b abuts on the shoulder of the contact 22 together with the main tapered surface 24a, so that the contact 22 can be held with a stable and sufficient strength. Is possible.

FIG. 2A is a front view of the contact receiving cavity 21 of the housing body 20 as viewed from the fitting surface side.
In the figure, the contact 22 is schematically shown by a broken line. Since the contact 22 is not pressed and held at a predetermined position by the double lock member 30, the contact 22 is displaced with respect to the contact receiving cavity 21. However, when pressed by the pressing member 33 of the double lock member 30, the bottom surface 2 of the cavity 21
The bottom surface of the contact 22 is pressed against 1a to be correctly positioned.

Although the preferred embodiment of the electrical connector of the present invention has been described above, the present invention should not be limited to such a specific embodiment. It will be understood that various modifications can be made in accordance with the particular application without departing from the spirit of the invention. The electrical connector of the present invention does not necessarily need to be a double lock type connector.

[0018]

As will be understood from the above description, according to the electrical connector of the present invention, the free end of the housing lance integrally formed with the insulating housing in the contact receiving cavity has a central main tapered surface and one side. A pair of contact surfaces are formed to contact the shoulder of the contact. Therefore, it is possible to stably hold the contact in the contact receiving cavity with sufficient tensile strength. Therefore, the electrical connector of the present invention is very suitable for a multi-pole connector using a relatively small number of contacts.

[Brief description of the drawings]

FIG. 1 shows a preferred embodiment of an electrical connector according to the present invention, wherein (A) is a longitudinal sectional view of a housing, (B) is a sectional view of a double lock member inserted into a fitting surface of the housing,
(C) is a sectional view of a combined state of the housing and the double lock member.

2A is a plan view of a contact receiving cavity as viewed from a mating surface side of the housing of FIG. 1, and FIG. 2B is a perspective view of a free end portion of a housing lance of the electrical connector of the present invention.

3A and 3B show a part of a conventional electrical connector, wherein FIG. 3A is a sectional view of a double lock member, and FIG. 3B is a sectional view of a contact inserted into a housing and a contact receiving cavity.

[Explanation of symbols]

 Reference Signs List 20 Insulated housing 21 Contact receiving cavity 22 Contact (receptacle type contact) 24 Housing lance 24a Main tapered surface 24b Contact surface

Claims (1)

(57) [Scope of request for utility model registration] 1. An electrical connector having a housing lance formed integrally with the insulating housing in a contact receiving cavity of the insulating housing and engaged with and held by a receptacle-type contact inserted into the contact receiving cavity. The free end of the lance has a main tapered surface formed at the center and a pair of contact surfaces formed on both sides of the main tapered surface and abutting on both shoulders of the receptacle type contact. Electrical connector.