JP4094778B2 - Electrical connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical connector that can be used, for example, in a wire harness of an automobile.
[0002]
[Prior art]
In this type of conventional electrical connector, a plurality of connection terminals connected with electric wires are inserted into the housing from the rear, the connection terminals are locked by a locking lance provided on the housing, and the rear holder engaged with the rear of the housing is engaged. In many cases, the locking force of the locking lance is improved. On the other hand, the rear holder is inserted into the housing approximately halfway between the temporary engagement position and the rear holder is fully pushed into the housing at the final engagement position, and the connection terminal is inserted into the housing at the temporary engagement position. In some cases, the connection terminal is locked at the engagement position.
[0003]
[Problems to be solved by the invention]
However, in the latter case, since the housing and the rear holder are locked by the locking arm extending in the axial direction, the length of the housing and the rear holder in the axial direction is increased, and the backlash between the housing and the rear holder is increased. There is a problem that occurs.
[0004]
An object of the present invention is to provide an electrical connector that can solve the above-described problems, can reduce the size of the housing and the rear holder, and can prevent rattling between them.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an electrical connector according to the present invention includes a housing made of a synthetic resin that accommodates a connection terminal having an electric wire connected to the rear portion, and the housing of the connection terminal engaged with the rear portion of the housing. A rear holder made of a synthetic resin that prevents the rear holder from coming out of the housing, and the housing and the rear holder are positions where the rear holder is inserted approximately halfway into the housing, and the connection terminals are inserted into the housing. An electrical connector that engages at a temporary engagement position that is allowed and a fully-engaged position that is a fully-pressed position and prevents the connection terminal from coming out of the housing. the right and left walls of the main body portion of the rear holder, provided on the left and right portions of the housing in the present engagement position and the provisional engagement position A first locking projection that engages with the first locking portion is provided, and second walls provided on the upper and lower portions of the housing at the temporary engagement position and the main engagement position on the upper and lower walls of the rear holder. A second locking projection and a third locking projection that are engaged with the locking portion are provided at intervals in the front-rear direction, and the front end of the first locking projection is at the first engagement position in the temporary engagement position. And the rear end of the second locking projection is engaged with the front edge of the second locking portion, and the front end of the third locking projection is the first end of the second locking projection. engages the rear edge of the second locking portions, when the transition to the present engagement position from the provisional engagement position, while the first locking projections deflect the lateral wall of the rear holder inwardly the with moving submerged escape to the leading edge from the trailing edge of the first engagement portion, the third locking projection is moved Passing through the front edge from the trailing edge of the second fastening member In the fully engaged position, the first locking protrusion engages the rear end with the front edge of the first locking portion, and the third locking protrusion has the rear end engaged with the second engagement. It is characterized by engaging with the front edge of the stop .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail based on the embodiments shown in the drawings.
FIG. 1 is an exploded side view in which a part of the embodiment is cut away. An electrical connector is a housing 1 that houses a plurality of connection terminals in which electric wires are connected to the rear part, and a rear part of the housing 1 that engages with the housing 1. It is comprised from the rear holder 2 which latches the accommodated connection terminal. The housing 1 and the rear holder 2 are formed substantially vertically symmetrically from a synthetic resin material, and the rear holder 2 is inserted from the rear to the substantially middle to allow a connection terminal to be inserted. The locking is possible at the fully engaged position where the connection terminal is fully pushed into the housing 1 and pushed into the predetermined position.
[0007]
FIG. 2 is a rear view of the housing 1, and the housing 1 has upper and lower outer walls 11 and left and right outer walls 12. A gap 13 and a left and right gap 14 are provided. The left and right gaps 14 are wider than the upper and lower gaps 13, and left and right inner walls 15 are provided inside the left and right gaps 14. The left and right inner walls 15 are partitioned by, for example, one partition wall 16 that partitions the upper and lower sides and a plurality of partition walls 17 that partition the left and right, and a plurality of terminal accommodating chambers 18 are formed.
[0008]
In the rear portion of the upper and lower outer walls 11 of the housing 1, for example, three protrusion engaging holes 19 for engaging the front and rear locking protrusions described later of the rear holder 2 are formed. The left and right outer walls 12 of the housing 1 are strip-like locking portions 20 cut from both front and rear directions. The strip-shaped locking portion 20 has a bridge shape extending in the vertical direction, and the left and right locking projections, which will be described later, of the rear holder 2 can be locked at the front edge and the rear edge.
[0009]
FIG. 3 is a rear view of the rear holder 2. The rear holder 2 has a square cylindrical holder main body 31, and the upper and lower walls 32 and the left and right walls 33 of the holder main body 31 are respectively connected to the upper and lower gaps 13 and 14 of the housing 1. In particular, the left and right walls 33 are easily bent inward. A flexible locking lance 34 that protrudes into the terminal accommodating chamber 18 of the housing 1 and individually locks the connection terminals protrudes from the front edge of the upper and lower walls 32. A front locking projection 35 and a rear locking projection 36 that can be engaged with the projection engaging hole 19 of the housing 1 are formed on the outer surface of the upper and lower walls 32 at a predetermined interval. On the outer surface of the left and right walls 33, left and right locking projections 37 that are larger than the front and rear locking projections 35 and 36 and can be engaged with the strip-shaped locking portion 20 of the housing 1 are provided.
[0010]
As shown in FIG. 4, when the rear holder 2 is engaged with the housing 1 in the temporary engagement position, the locking lance 34 enters approximately the middle before and after the terminal accommodating hole 18, and the holder main body of the rear holder 2. 31 slightly enters the inside of the housing 1. At this time, the locking protrusion 35 on the front of the rear holder 2 engages with the rear end of the protrusion engaging hole 19 of the housing 1 , that is, the front edge of the upper and lower outer walls 11 acting as a locking portion , and at the rear of the rear holder 2. The stop protrusion 36 engages with the rear edge of the upper and lower outer walls 11. At the same time, the front ends of the left and right locking projections 37 of the rear holder 2 engage with the rear edge of the strip-like locking portion 20 of the housing 1. As a result, the rear holder 2 is locked to the temporary engagement position without moving forward and out of the housing 1 and allows the connection terminal to be inserted into the housing 1.
[0011]
When all the connection terminals are inserted into the housing 1 and then the rear holder 2 is pushed into the housing 1, the rear holder 2 moves forward while pushing the connection terminals. At this time, the locking protrusions 36 at the rear of the rear holder 2 slide on the inner surfaces of the upper and lower outer walls 11 of the housing 1, and the left and right locking protrusions 37 of the rear holder 2 are connected to the left and right walls 33 of the rear holder 2 as shown in FIG. Is moved inwardly through the strip-like locking portion 20 of the housing 1 while being bent inward.
[0012]
When the rear holder 2 is sufficiently pushed into the housing 1 as shown in FIG. 6, the locking projection 36 on the rear side of the rear holder 2 engages with the rearmost portion of the projection engaging hole 19 of the housing 1 and the rear holder 2. The rear ends of the left and right locking projections 37 are engaged with the front edge of the strip-like locking portion 20 of the housing 1, and the rear holder 2 is locked to the main engagement position with respect to the housing 1.
[0013]
【The invention's effect】
As described above, the electrical connector according to the present invention eliminates the need for the conventional locking arm extending in the axial direction, so that the axial length of the housing and the rear holder can be shortened, and the backlash between them can be reduced. Can prevent sticking. Further, since the locking projection moves while bending the left and right walls, the locking projection can be enlarged, and the holding force between the housing and the rear holder at the temporary locking position and the main locking position can be improved.
[Brief description of the drawings]
FIG. 1 is an exploded side view in which a part of an embodiment is cut away.
FIG. 2 is a rear view of the housing.
FIG. 3 is a rear view of the rear holder.
FIG. 4 is an operation explanatory diagram.
FIG. 5 is an operation explanatory diagram.
FIG. 6 is an operation explanatory diagram.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 2 Rear holder 19 Projection engagement hole 20 Strip-shaped latching part 31 Holder main body 32 Upper and lower wall 33 Left and right wall 34 Locking lance 35-37 Locking protrusion

Claims (2)

A synthetic resin housing that accommodates a connection terminal connected to the rear part of the electric wire from the rear part, and a synthetic resin rear holder that engages with the rear part of the housing to prevent the connection terminal from coming out of the housing, The housing and the rear holder are a position where the rear holder is inserted almost halfway with respect to the housing, a temporary engagement position that allows the connection terminal to be inserted into the housing, and a position where the rear holder is fully pushed. In the electrical connector to be engaged with the main engagement position for preventing the connection terminal from coming out of the housing,
The left and right walls of the main body portion of the rear holder that can enter the interior of the housing are engaged with first locking portions provided on the left and right portions of the housing at the temporary engagement position and the main engagement position. 1 locking protrusion,
The upper and lower walls of the rear holder are provided with a second locking projection and a third locking engagement with a second locking portion provided on the upper and lower portions of the housing at the temporary engagement position and the main engagement position. Protrusions are provided at intervals in the front-rear direction,
In the temporary engagement position, the front end of the first locking projection engages the rear edge of the first locking portion, and the rear end of the second locking projection is the second locking portion. The front end of the third locking projection engages the rear edge of the second locking portion,
During the transition from the temporary engagement position to the main engagement position, the first locking projections are bent from the rear edge to the front edge of the first locking portion while bending the left and right walls of the rear holder inward. The third locking protrusion moves from the rear edge to the front edge of the second locking portion, and moves while diving through,
In the fully engaged position, the first locking protrusion engages the rear end with the front edge of the first locking portion, and the third locking protrusion has the rear end engaged with the second engagement. An electrical connector that engages with a front edge of a stop . The electrical connector according to claim 1, wherein the connection terminal is prevented from coming out of the housing by a locking lance provided in the rear holder .

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