JP2000106242A - Electrical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connector which has a secondary locking member, capable of making the position of a contact more stable and sufficiently enhancing the resistance with respect to the tension of wire. SOLUTION: This electrical connector 10 includes a housing body 30 which encloses a contact 50 and a secondary locking member 40 for achieving secondary locking of the contact 50. The secondary locking member 40 is engaged at a recess part 41 with a metal plate piece 52 projecting to a side face of the contact 50. A projection structure 45 behind the recess part 41 is engaged with the second support wall 72 of the housing body 30 at approximately the same height position as the position for engagement with the metal plate piece 52.

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 having a secondary locking member for retaining a contact.

[0002]

2. Description of the Related Art An example of this type of electrical connector is disclosed in Japanese Unexamined Patent Publication No.
No. 95367. The disclosed electrical connector has a contact that is primarily locked in a cavity provided in a body of the housing, and further includes a secondary locking member that prevents the contact from being removed. The secondary locking member has a locking projection protruding from its bottom surface. The locking projection is configured to be engageable with a metal plate protruding from both side surfaces of the contact.

[0003]

According to the electric connector disclosed in the above-mentioned publication, the locking projection engaged behind the engaging portion of each contact projects from the secondary locking member. The rear end of the secondary locking member is configured to engage with the housing at a position away from the engagement portion with the contact. Therefore, when an external pulling force is applied to the wire connected to the contact, the secondary locking member may be raised, and further improvement has been desired.
Accordingly, an object of the present invention is to provide an electric connector including a secondary locking member having sufficiently high resistance to a pulling force applied to a contact via a wire.

[0004]

According to the present invention, there is provided a contact formed such that a metal plate piece linearly protrudes laterally, a housing body for accommodating the contact, and the metal plate piece of the contact. And a secondary locking member for preventing the contact from coming off by the engagement of the engaging wall, wherein the secondary locking member is engaged with the housing main body. The rear surface of the engaging wall engaging with the contact is configured to engage with a part of the housing main body at a position substantially equal to an engaging position with the metal plate piece. I do.

Preferably, the secondary locking member has a concave portion having a complementary shape at an intermediate position in a direction along a length direction of the contact so as to receive the metal plate piece, and the engaging wall is provided with the engaging wall. It is the rear wall of the recess.

Preferably, the secondary locking member is connected to the housing body via a hinge whose rear end side is a rotation shaft side and whose front end side is moved in a rotation direction.

[0007] Preferably, a beam is provided in a cavity of the housing body for accommodating the contact, the beam extending in a longitudinal direction of the cavity so as to be engaged with a side surface of the metal plate piece to maintain a posture of the contact. .

[0008] Preferably, the metal plate piece is formed so as to have an inclined edge on the front side and to have a narrow width at the protruding tip side.

Preferably, an inclined surface is formed at a front bottom corner of the engagement wall.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an electric connector according to a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partial sectional view showing a housing structure used for the electric connector of the present invention. FIG. 2 shows the contacts held in the housing of FIG.
(A) is a plan view, and (b) is a front view.

Referring to FIG. 1, the housing 20 of the electrical connector 10 includes a housing body 30 and a hinge 31 thereon.
And a secondary locking member 40 that is coupled via the The housing body 30 has a contact receiving cavity 34 extending between the mating surface 32 and the contact insertion side surface 33. Contact 5 shown in FIG.
0 is accepted. A lance 35 is provided in the cavity 34 to temporarily lock the received contact 50. The lance 35 includes a convex portion 35a that engages with the concave groove 51 located on the bottom side of the contact 50 shown in FIG. The secondary locking member 40 is rotatable with respect to the housing main body 30 in the direction of arrow A shown in FIG. The secondary locking member 40 includes a concave portion 41 that engages with a pair of metal plate pieces 52 protruding from the top side surface of the contact 50 in a manner described later.

Further referring to FIG. 2, the contact 50 has a substantially box-shaped female contact portion 55, a conductor barrel 56 for crimping and fixing the conductor and the insulating coating of the insulating wire, respectively, and a coating barrel 57. A contact leaf 58 (see FIG. 3A) is provided inside the female contact portion 55. The above-described concave groove 51 is located on the bottom side of the female contact portion 55, and the metal plate piece 52 projects to the top from the rear end position of the female contact portion 55. A slanted edge 52a is formed on the front side edge of the metal plate piece 52 and extends obliquely. A locking edge 52b, which is a rear edge, also extends slightly rearward toward the top. Since the inclined edge 52a has a large inclination, the top edge 52c of the metal plate piece 52 has a relatively short dimension.

FIGS. 3A and 3B are cross-sectional views along the length direction of the cavity showing the state where the contact is locked, wherein FIG. 3A is a cross-section along the center line of the cavity, and FIG. It is a figure which shows the cross section in the position along.

FIG. 3 shows that the secondary locking member 40 is engaged and fixed along the top wall 39 of the housing body 30. The means for engaging and fixing includes, for example, an engaging projection (not shown) provided at both side end positions of the secondary locking member 40 and an engaging claw 61 (see FIG. 1) located at an outer end thereof.
It may be. At this time, as shown in FIG.
It is understood that the concave portion 41 of the next locking member 40 is engaged with the metal plate piece 52 and the contact 50 is prevented from coming off.

[0016] As shown in FIG.
On the top side of the zero cavity 34, a rigid beam 38 extending in the length direction is formed. When the contact 50 is received in the cavity 34, the pair of metal plates 52 of the contact 50 engage with the side surface of the beam 38 to maintain its position. Therefore, it is understood that the concave portion 41 of the secondary locking member 40 is formed in the wall portions 44 formed on both sides of the relatively thin base 43. As described above, since the front side edge of the metal plate 52 includes the inclined edge 52a, the engagement between the metal plate piece 52 and the beam 38 when the contact 50 is inserted is performed smoothly.

A projecting structure (engaging wall) 45 is formed continuously on the rear side of the recess 41 while forming a part thereof. The protruding structure 45 extends through the beam 38 to the bottom side. The projecting structure 45 cooperates with the beam 38 when the secondary locking member 40 is engaged with the housing body 30.
1 acts to position or guide the metal plate piece 52 so that it can be received smoothly and reliably. An inclined surface 46 is formed at the tip of the protruding structure 45 so as to smoothly enter the rear of the contact 50 in the cavity 34. The inclined surface 46 corrects a slight displacement of the contact 50 to the rear side when the secondary locking member 40 is completely mounted on the housing main body 31, and moves the contact 50 to the normal position further forward. They can also be moved.

According to this embodiment, since the metal plate piece 52 of the contact 50 is configured to be received in the concave portion 41, the secondary locking member 40 is made relatively small in the height direction. It can be formed, and the concave portion 41 and the metal plate piece 5 can be formed.
2 and a rigid beam 3 with the metal plate 52
The posture of the contact 50 is stably maintained by engagement with the side surface of the contact 8. Further, the secondary locking member 40 is prevented from moving backward by the first support wall 71 provided outside the cavity 34, and the rear wall of the concave portion 41 engaged with the metal plate piece 52 of the contact 50. Is formed in the cavity 34 of the housing main body 30 at the same height position as the position where the protruding structure 45 is engaged with the metal plate piece 52 on the side facing the pair of metal plate pieces 52, 52. Wall 7
Since the contact 50 is configured to be engaged with the contact 2, the contact 50 has sufficient resistance even when the contact 50 receives a pulling force rearward via a wire (not shown), and the contact 50 is reliably prevented from coming off. Further, when the secondary locking member 40 is completely mounted on the housing body 30, the secondary locking member 40
The projecting structure 45 of the recess 4 is configured to engage with the beam 38 before the metal plate 52 is received in the recess 41,
There is also an advantage that a smooth engagement between the metal plate 1 and the metal plate piece 52 is enabled.

[0019]

According to the electrical connector of the present invention, the secondary locking member has a complementary-shaped recess at an intermediate position along the length direction of the contact so as to receive the metal plate piece.
When the next locking member is engaged with the housing body, the concave portion and the metal plate piece are engaged with each other to prevent the contact from coming off, and the rear surface of the engaging wall forming the rear side wall of the concave portion has the same height as the metal plate piece. Since the contact is configured to engage with a part of the housing body at the position, the contact is held with sufficiently high strength even when a tensile force is applied to the contact via the wire.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing a housing structure used for an electric connector of the present invention.

FIGS. 2A and 2B are diagrams showing a contact held in a housing of FIG. 1, wherein FIG. 2A is a plan view and FIG.

3A and 3B are cross-sectional views along a length direction of a cavity showing a state where a contact is locked, wherein FIG. 3A is a cross-section along a cavity center line, and FIG. 3B is a position along one inner surface of the cavity. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric connector 30 Housing main body 40 Secondary locking member 45 Projection structure (engagement wall) 50 Contact 52 Metal plate piece

Claims (1)

[Claims] 1. A contact formed such that a metal plate piece linearly projects laterally, a housing body for accommodating the contact, and an engaging wall for engaging the metal plate piece of the contact. An electrical connector having a secondary locking member for preventing the contact from coming off by engagement of the engagement wall, wherein the secondary locking member engages with the contact when the secondary locking member is engaged with the housing body. The electrical connector according to claim 1, wherein a rear surface of said engaging wall engages with a part of said housing body at a position substantially equal to an engaging position with said metal plate piece.