JPS6251170A - Plug for electric connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a receptacle having a plug receiving opening;
The present invention relates to an electrical connector of the type having a plug that is received within the opening.

(Prior Art) As the above-mentioned type of electrical connector, one for telephone lines is well known, and the present applicant has already proposed this type of electrical connector (Japanese Patent Laid-Open No. 78481/1983). An example of this proposed electrical connector is shown in FIGS. 5 and 6. In a receptacle 1 having a plug receiving opening 2, a plug 3 to which a plurality of covered wires 4 are connected is inserted into the opening 2. The plug contact 6 and the receptacle contact 2a are brought into contact with each other. In the plug 3, the plug contacts 6 are press-fitted into the plurality of contact insertion grooves 5a formed on the lower surface of the housing 5 with respect to the plurality of covered wires 4 inserted into the insulating housing 5. The upper end passes through the sheath of the electric wire 4 and is connected to the core wire. The details of this part are shown in FIG. 7, and as can be seen from this figure, the upper end 6a of the plug contact 6, which is press-fitted from below, breaks through the sheath of the electric wire 4 due to this pressing force and comes into contact with the core wire 4a. Figure 8 shows a cross-section of the plug 3 along the arrow ■-■ in this figure.The pressing force of the plug contact 6 must be large to some extent in order to break through the sheathing of the electric wire 4. There is a problem in that the upper wall 5a of the housing 5 that holds the receiver is warped upward as shown by the broken line. This tendency becomes more noticeable as the number of electric wires increases and the width of the housing 5 increases, making it difficult to ensure a sufficient pressing force of the plug contacts 6 and causing poor contact between the electric wires 4 and the plug contacts 6. For this purpose, the upper wall 5a of the housing 6 could be made thicker to increase its rigidity, but this would make the plug larger, which is not very preferable.

For this reason, the present applicant proposed a plug composed of a plurality of plug contacts 11, a base housing 12, and a cover housing 13 as shown in FIGS. 9 and 10 (Japanese Patent Application No. 59-252773). . In this proposal, the plug contact 11 has a contact part 11a that comes into contact with the electric wire 4 so that its tip bites into the sheath and makes contact with the core wire 4a, and a pair of contacts that are press-fitted and locked into the press-fit locking hole 12a of the cover housing 13. The protrusions 11b, 11
b, and the plug contact 1 is attached to the base housing 13.
1 is held, the base housing 13 and the cover housing 12 sandwich the end of the wire 4, and the abutting portion 11
a is inserted into the sheath of the electric wire 4, and the press-fitting force to the abutment portion 11a is maintained by the engagement between the protrusion 11b and the press-fit locking hole 12a. In this way, the warping of the upper wall of the housing as shown in FIG. 8 can be prevented, but
The contact part 11a is shifted laterally, and the protrusion part 11b is connected to the electric wire 4.
It is necessary to avoid contact with the contact part 1.
1. When the wire a is press-fitted into the sheath of the electric wire 4, there is a risk that it will be press-fitted at an angle due to a torsional moment. Moreover,
When the abutment part 11a is press-fitted with an inclination in this way, the core wire 4a
There is a problem that this may lead to poor contact with the

(Object of the Invention) In view of these problems, the present invention has been developed to cover the wire by preventing twisting moment from being generated in the contact portion when the contact portion of the plug contact comes into contact with the wire and is press-fitted into the sheath. Another object of the present invention is to provide a plug for an electrical connector which can be properly press-fitted into the plug.

(Structure of the Invention) The electrical connector plug of the present invention includes a plurality of plug contacts, a base housing that holds the plug contacts, an electric wire between the base housing and the base that holds the wire with the end pressed against the plug contacts. The plug contact is comprised of a cover housing that engages with the housing, and each plug contact has an abutting part that comes into contact with the electric wire and is press-fitted into the sheath for electrical connection, and a locking part that is press-fitted and locked into the press-fitting locking hole of the cover housing. This locking part consists of a pair of protrusions located at the front and rear of the abutting part, and is arranged on the left and right opposite sides of the abutting part so as to be point symmetrical when viewed from above. When the cover housing is engaged with the base housing, the electric wire pushed by the cover housing is pressed by the abutting part and bites into the wire sheathing, electrically connecting the electric wire and the plug contact, and the protrusion is press-fitted into the press-fit locking hole. The press-fitting locking force of the cover housing maintains the pressing force against the abutting portion.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an example of a plug according to the present invention, showing each component before the plug is assembled.

This plug has contact 50. It consists of a base housing 20 and a cover housing 30. The contact 50 is formed by punching and molding a conductive metal plate, and has a bifurcated connecting portion 51 at the front end for electrical connection with the receptacle contact of the receptacle into which this plug fits, and a cover at the center. It has a projection 52 for press-fitting and fixing it to the housing 30, and a locking projection 53 protruding from both front and rear ends at the rear part.
Press-fit locking protrusions 53 having 53a and 53a are formed at two locations, and these press-fit locking protrusions 53.5
A contact portion 54 for penetrating the covering of 1!8114 and contacting the core wire 4a is formed between the portions 3 and 3. This contact 50 is shown in detail in FIGS. 2A to 2C, and as can be seen from these figures, press-fitting locking protrusions 53, 53 are located before and after the abutting part 54, and this The press-fitting locking protrusion 53°53 is disposed on the opposite side in the left-right direction to the abutting portion 54, and is positioned point-symmetrically with respect to the abutting portion 54 when viewed from above (FIG. 2A). Further, a wire holding projection 55 is formed at the rear of the rear press-fitting locking projection 53, and the wire holding projection 55 is engaged with the upper and lower locking grooves 23a of the base housing 20 at the lower part of the wire holding projection 55. A movement regulating protrusion 15 is formed to regulate the vertical movement of the end.

The base housing 20 is made of an insulating material and holds the plurality of contacts 50 side by side in the width direction (in the direction of the arrow), and has a plurality of connection part receiving holes 21 into which the connection parts 51 of the contacts 50 are inserted. and contact 5 above
It has a plurality of contact receiving grooves 22 into which the rear part of the contact receiving groove 22 is received. At the rear end of the partition wall 23 forming the contact receiving groove 22, a vertical locking groove 23a that engages with the movement regulating projection 56 of the contact 50 is provided. At both ends of the base housing 20 (in this figure, only one end is shown because the base housing 20 is cut away), there are mounting grooves 24 for engaging and holding the cover housing 30, and these grooves 24.
4 is formed with a mounting engagement step 25 located within the same position. Note that this base housing 20 is vertically symmetrical,
The contacts 10 can also be arranged side by side on the lower surface side, and another cover housing 30 can be attached from the lower surface side.

The cover housing 30 has engagement protrusions 31a on both ends (in this figure, only one end is shown like the base housing 20) that engages with the mounting engagement stepped portion 25 of the base housing 20. An arm 31 is formed, and a plurality of Nm receiving grooves 32S for receiving the ends of the electric wires 4 are arranged in parallel between the engaging arms 31 on both sides of the engaging arms 31. Each of the partition walls 33 is cut out at two places, and press-fit locking holes 34 are formed in these parts.Furthermore, a rib 35 is formed at the base of the rear end of this partition wall 33, and is received in the wire receiving groove 32. The end portion of the electric wire 4 is held between the ends.

Next, the process of connecting the electric wire 4 to the plug using the above components will be explained with reference to FIGS. 3 to 4.

First, the contacts 50 are attached to the base housing 20. To do this, the contact 50 is inserted into the connection part receiving hole 21 of the base housing 20 from the rear side, and the rear half of the contact 50 is positioned in the contact receiving groove 22. At this time, the press-fit fixing protrusion 52 of the contact 50
is press-fitted into the connection portion receiving hole 21, the movement regulating protrusion 56 engages with the upper and lower locking grooves 23a, and the contact 50 is fixed.

Next, the end of the wire 4 is pushed into the wire receiving groove 32 of the cover housing 30. At this time, as described above, the electric wire 4 is held between the ribs 35 formed on the partition wall 33, and the electric wire 4
It is designed to withstand axial tension.

After that, the cover housing 30 is pressed so as to cover the rear half of the contact 50 on the base housing 20, and the engagement arms 31 at both ends of the cover housing 30 are engaged with the mounting engagement steps 25 of the base housing 20, A cover housing 30 is attached to the base housing 20.

At this time, as shown in the perspective view of FIG.
The press-fitting locking protrusion 53 is press-fitted into the press-fitting locking hole 34 of the cover housing 30, and the abutting portion 54 contacts the electric wire 4 received in the wire receiving groove 32 to secure the electric wire 4 into the wire receiving groove 32. Press it against the bottom surface 32a of the. For this reason, the contact portion 54
breaks the sheath of the electric wire 4 and comes into contact with the core wire 4a.

FIG. 4 is a cross-sectional view of the present plug in the front-rear direction with the electric wire 4 connected in this way. As can be seen from these figures, the press-fitting locking protrusion 53 is inserted into the press-fitting locking hole 34. When press-fitted inside, the locking protrusions 53 at both ends of the press-fit locking protrusions 53
a, 53a bites into the press-fit locking hole 34 to ensure engagement between the two. With this engagement, each contact 50
In each case, the contact portion 54 of the contact 50 can penetrate the sheath of the electric wire 4 and maintain a state in which it is in contact with the core wire 4a.

At this time, the contact portion 54 of the contact 50 is located at the center, and the press-fit locking protrusion 53 is located at the contact portion 54 when viewed from above.
Since it is located on the opposite side in the left-right direction and is point symmetrical, the pressing force applied to the lower surface 57 of the contact 50 when attaching the cover housing 30 to the base housing 20 acts to push up the contact portion 54 as it is. , no torsional moment acts on the contact portion 54. Moreover, since the forces acting on the press-fit locking protrusion 53 on the left and right sides are balanced, no torsion moment is applied to the abutment portion 54. Therefore, the contact portion 54 cuts straight into the sheathing of the electric wire 4 and reliably contacts the core wire 4a.

Further, as shown in FIG. 4, when the cover housing 30 is attached to the base housing 20 while holding the electric wire 4, the electric wire holding protrusion 55 at the rear end of the contact 50 will hold the electric wire 4 between it and the cover housing 30. , part of the tip slightly digs into the coating. The wire is held by the wire holding protrusion 55 to prevent the wire from coming off when the wire 4 is pulled.

(Effects of the Invention) As described above, according to the present invention, each of the plurality of plug contacts held side by side in the base housing has an abutment portion and a pair of press-fit locks located before and after the abutment portion. In both cases, the pair of press-fitting and locking protrusions are arranged on opposite sides in the left-right direction with respect to the abutting part, and the abutting part is attached to the electric wire received in the receiving groove of the cover housing. The pressing force to force this abutting part to penetrate the wire sheath and contact the core wire is maintained by the press-fit locking force between the press-fit locking protrusion and the press-fit locking hole of the cover housing. Because of this structure, the above-mentioned pressing force acts directly on the abutting part, without giving any twisting moment to the abutting part, and the abutting part bites straight into the center of the wire sheathing, ensuring secure contact with the core wire. Since the cover is applied with pressure to each plug contact, the pressing force of each plug contact can be reliably maintained.

Furthermore, the wire holding protrusion formed at the rear end of the plug contact holds the wire between the cover housing and the wire, thereby preventing the wire from coming off even if an outward pulling force is applied to the wire. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the plug according to the present invention broken down into its components, and FIGS. 2A to 2C are a plan view, a front view, and a side view showing the plug according to the present invention, respectively. , FIG. 3 is a perspective view showing the contacts and cover housing of the plug according to the present invention, FIG. 4 is a cross-sectional view showing the plug according to the present invention cut along the front-rear direction, and FIGS. 5 and 6 are A perspective view and a cross-sectional view showing one example of a conventional electrical connector, and FIGS. 7 and 8 are one example of a conventional electrical connector plug.
Exemplary cross-sectional perspective and cross-sectional views, FIGS. 9 and 10
The figures are a perspective view and a sectional view showing another example of a conventional electrical connector plug. 4... Electric wire 4a... Core wire 20.
... Base housing 21 ... Connection part receiving hole 30 ... Cover housing 32 ... Wire receiving groove 34 ... Press-fit locking hole 5
0... Contact 53... Press fit locking protrusion 54... Contact part 55... Amount of wire holding protrusion 1 Figure η Figure 2A Figure 4 Figure 3 (voluntary) procedure manual Dear Commissioner of the Patent Office, November 5, 1985 Plug for Electrical Connector 3, Relationship with the Amended Person's Case Patent Applicant Address 1710, Pennsylvania, United States of America
5 Harrisburg Eisenhower Pulbird (no address) Name Amp Incorporated 4, Agent Address: 106 7th floor, Hauraiya Building, 5-2-1 Roppongi, Minato-ku, Tokyo Exit (479) 2367 (7318)
Patent Attorney Yanagi 1) Seishi (one idiot) 5. Date of amendment order: None 8. Contents of amendment 1) The scope of the patent claims will be amended as shown in the attached sheet. 2) Page 3 of the specification, lines 14.18 to 19.19, page 4
Pages 2-3.6-7.12.13.19, page 5, lines 2.7.14, page 6, lines 3-4.10-11.11
．． 13. Line 16, same page 7, No. 5-6. Same page 13, No. 6~
7. Lines 79-20. On page 14, line 1.3, ``Plug contact'' is corrected to ``First contact.'' 3) Specification, page 3, 14-15. 7th page 18-1
Line 9 "Receptacle contact" is "Second contact"
I am corrected. Claims 1) A plug having a plurality of 11 contacts each electrically connected to a plurality of electric wire ends inserted from the outside;
and a receptacle having a plurality of arm contacts that fit with the plug and abut the plurality of 11 contacts, respectively, wherein the plug includes a base housing holding the plurality of 11 contacts, and the base housing. a cover housing that engages the base housing with the wire end portion held between the wire end portion and the wire end portion pressed against the first contact, and each of the two contacts:
It has a contact portion that contacts and electrically connects the electric wire, and a locking portion that is press-fitted into a press-fit locking hole formed in the cover housing, and the locking portion is located at the front and rear of the contact portion. It consists of a pair of front and rear protrusions that are located, and the pair of protrusions are arranged to be located on the opposite side in the left-right direction with respect to the abutment part, and when the base housing and the cover housing are engaged, , the electric wire is pressed by the cover housing and pressed by the abutment portion and bites into the sheath of the electric wire, electrically joining the core wire of the electric wire and the 11 contacts, and the locking portion is pressed into the press-fit locking position. 1. A plug for an electrical connector, characterized in that the plug is press-fitted into a hole, and the force of this press-fitting locking force maintains the pressing force of the cover housing against the abutting portion. 2) The LL contact has an electric wire holding protrusion on the rear side of the rear protrusion, and the electric wire holding protrusion holds the electric wire between the base housing and the cover housing when the base housing and the cover housing are engaged. The electrical connector plug according to claim 1, characterized in that the electrical connector plug is configured to:

Claims (1)

[Claims] 1) A plug having a plurality of plug contacts each electrically connected to a plurality of electric wire ends inserted from the outside;
An electrical connector comprising a receptacle having a plurality of receptacle contacts that fit with the plug and abut each of the plurality of plug contacts, wherein the plug includes a base housing holding the plurality of plug contacts; a cover housing that engages with the base housing in a state in which the end portion of the electric wire is held between the cover housing and the end portion of the electric wire is pressed against the plug contact, and each of the plug contacts is in contact with the electric wire to form an electrical connection. and a locking portion that is press-fitted into a press-fit locking hole formed in the cover housing, and the locking portion includes a pair of front and rear protrusions located before and after the abutment portion. and the pair of protrusions are arranged to be located on opposite sides in the left-right direction with respect to the contact portion, and are pushed by the cover housing when the base housing and the cover housing are engaged. The electric wire is pressed by the abutting portion and bites into the sheath of the electric wire, electrically joining the core wire of the electric wire and the plug contact, and the locking portion is press-fitted and locked in the press-fit locking hole. A plug for an electrical connector, characterized in that the pressing force of the cover housing against the abutting portion is maintained by a locking force. 2) The plug contact has an electric wire holding protrusion on the rear side of the rear protrusion, and the electric wire holding protrusion holds the electric wire between the base housing and the cover housing when the base housing and the cover housing are engaged. The electrical connector plug according to claim 1, characterized in that the electrical connector plug is configured to: