JP2004006388A - Connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure the stable locking state of a locking lance with a connection terminal. <P>SOLUTION: A connection terminal 71 is not provided with a stabilizer piece but provided with a terminal connection part 72, a core wire fixing part 73, and a wire coating fixing part 74 in this order. The coating of a wire 11 is fixed by the wire coating fixing part 74 having an enlarged outer diameter. A fixing part fitting groove 83 to which the wire coating fixing part 74 having the enlarged outer diameter is fitted is formed at a base of a locking lance 84 of a holder body 82 of a rear holder 81. A terminal locking part 85 for locking the rear end of the terminal connection part 72 is formed in the locking lance 84. In a temporary engagement position and a proper engagement position, the locking lance 84 locks the rear of the terminal connection part 72 to thereby prevent the connection terminal 71 from moving backward, and the front wall of the fixing part fitting groove 83 locks the wire coating fixing part 74 to thereby prevent the connection terminal 71 from moving forward. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
The present invention relates to a connector which is used for electric wiring of, for example, an automobile and has a rear holder for locking a connection terminal housed in a housing.
[0002]
[Prior art]
In this type of conventional connector, a rear holder is engaged with the rear part of the housing so as to be able to move back and forth, and the rear holder is engaged with the housing at a temporary engagement position inserted halfway and a fully engaged position at which the rear holder is fully pushed. There are times when you try to. This is because when the rear holder is attached after housing the connection terminal in the housing, the wires connected to the connection terminal must be individually inserted into the rear holder. This is for passing.
[0003]
Further, a locking lance for locking the connection terminal housed in the housing may not be provided on the housing but may be provided integrally with the rear holder. In this case, the molding of the locking lance becomes easy, and the locking lance that requires relatively expensive and durable material is provided on the rear holder that requires only a small amount of resin, so that the overall cost is low.
[0004]
[Problems to be solved by the invention]
However, in this conventional connector, since the locking lance is formed in a shape that restricts the rearward movement of the connection terminal, the connection terminal inserted into the housing is pushed forward during the temporary engagement of the rear holder. In this case, there is a problem that the locking state between the locking lance and the connection terminal is easily broken.
[0005]
An object of the present invention is to solve such a problem and to provide a connector capable of always ensuring a stable locking state between a locking lance and a connection terminal.
[0006]
[Means for Solving the Problems]
A connector according to the present invention for achieving the above object includes a housing for accommodating a connection terminal to which an electric wire is fixed via a wire coating fixing portion in a terminal accommodating chamber, and a first and a second engagement at a rear portion of the housing. A rear holder engaged in a position, the rear holder includes a locking lance protruding forward, and a groove provided in a base of the locking lance, and the rearward movement of the connection terminal by the locking lance. , And the forward movement of the connection terminal is restricted by locking the wire covering fixing portion by the groove.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a sectional view of a reference example prior to the present invention, in which a connection terminal 12 connected to an electric wire 11 at a rear portion is housed in a housing 13, and the connection terminal 12 is locked by a rear holder 14 engaged with the rear portion of the housing 13. The state is shown.
[0008]
The connection terminal 12 is formed of a conductive metal plate, and has a rectangular tube-shaped terminal connection portion 21 for connecting a mating terminal (not shown), and two left and right stabilizer pieces 22 for stabilizing the posture of the connection terminal 12. 23 (23 is not shown), a core fixing part 24 for fixing the core of the electric wire 11, and a coating fixing part 25 for fixing the coating of the electric wire 11 are sequentially provided from the front.
[0009]
The housing 13 and the rear holder 14 are formed of an electrically insulating synthetic resin material. As shown in the perspective view of FIG. 2, the housing 13 has an upper wall 13a, upper and lower partitions 13b, a lower wall 13c and left and right partition plates. A plurality of terminal accommodating chambers 32 partitioned by 31 are provided in two rows and two rows. In the rear portion of the housing 13, slits 33, 34, and 35 are provided in which the upper wall, upper and lower partition walls, and lower wall of the rear holder 14 are fitted, respectively, and gaps 32a and 32b in which the side walls of the rear holder 14 are fitted are outermost partition plates. 31 and between the side walls 13d and 13e.
[0010]
At the front end of the terminal accommodating chamber 32, a front regulation portion 36 for regulating the forward movement of the connection terminal 12 is formed. A terminal support 37a for supporting the terminal connection portion 21 of the connection terminal 12 is provided at a front portion of the terminal accommodating chamber 32. A lance support for supporting a locking lance described later is provided at a rear end of the terminal support 37a. 37b is provided. Guide windows 38 and 39 are formed in the side walls 13d and 13e of the housing 13 so as to open rearward. The inner surfaces of the side walls 13d and 13e in front of the guide windows 38 and 39 have two locking grooves (not shown) on each side. Are formed respectively.
[0011]
On the other hand, the rear holder 14 is provided with a holder main body 51 which is fitted to the rear part of the housing 13 so as to be able to move back and forth. The holder main body 51 is provided with upper walls 51 a which fit into the slits 33, 34 and 35 of the housing 13, respectively. It has upper and lower partitions 51b, a lower wall 51c, and side walls 51d and 51e that fit into the left and right gaps 32a and 32b of the housing, respectively. Guide grooves 52 for guiding the bottom of the partition plate 31 of the housing 13 are respectively formed on the upper surfaces of the upper and lower partition walls 51b and the lower wall 51c, and guides guided to the guide windows 38 and 39 of the housing 13 are formed on the side walls 51d and 51e. Protrusions 53 and 54 are provided, and two locking protrusions 55 and 56 (56 are not shown) on one side, which are locked in the locking grooves of the housing 13, respectively.
[0012]
Locking projections 57 for locking the cover fixing portion 25 of the connection terminal 12 are provided on the upper wall 51a of the holder body 51 and the lower surfaces of the upper and lower partitions 51b, respectively. Further, a locking lance 58 for locking the terminal connection portion 21 of the connection terminal 12 and the stabilizer pieces 22 and 23 is provided at the front end of the holder main body 51 obliquely forward and upward from the upper and lower partition walls 51b and the lower wall 51c. It is projected toward.
[0013]
As shown in a partially enlarged perspective view of FIG. 3, the locking lance 58 has a width in contact with the partition plate 31 of the housing, that is, substantially the same width as the terminal accommodating chamber 32. A terminal pressing portion 61 press-fitted between the bases 37b and a terminal locking portion 62 for locking the rear end of the terminal connecting portion 21 are provided, and a stabilizer guide groove 63 for guiding the stabilizer pieces 22 and 23 is provided. 64 are formed on both side surfaces of the locking lance 58, respectively. The depths of the stabilizer guide grooves 63 and 64 are substantially equal to the thickness of the stabilizer pieces 22 and 23. With the stabilizer pieces 22 and 23 fitted in the stabilizer guide grooves 63 and 64, both sides of the locking lance 58 are provided. The surface comes into contact with both partition plates 31 of the terminal accommodating chamber 32. When the terminal locking portion 62 locks the rear portion of the terminal connection portion 21, the front walls of the stabilizer guide grooves 63 and 64 lock the front edges of the stabilizer pieces 22 and 23.
[0014]
The housing 13 and the rear holder 14 formed in this manner are, as shown in the perspective view of FIG. 4, a temporary engagement position where the rear holder 14 is inserted into the rear part of the housing 13 to the middle, and in the perspective view of FIG. As described above, the rear holder 14 is engaged with the housing 13 at the full engagement position where the rear holder 14 is sufficiently pushed.
[0015]
That is, at the temporary engagement position of the rear holder 14, the upper wall 51a, the upper and lower partition walls 51b, the lower wall 51c and the side walls 51d, 51e of the rear holder 14 fit into the slits 33, 34, 35 and the gaps 32a, 32b of the housing 13, respectively. The lower part of the partition plate 31 of the housing 13 fits into the guide groove 52 of the rear holder 14, and the guide projections 53 and 54 of the rear holder 14 fit into the guide windows 38 and 39 of the housing 13, respectively. Then, at the full engagement position of the rear holder 14, the locking projections 55 and 56 are respectively fitted into the locking grooves of the housing 13.
[0016]
The connection terminal 12 with the electric wire 11 is inserted into the terminal accommodating chamber 32 when the rear holder 14 is at the temporary engagement position. At this time, as shown in the upper part of FIG. 6, the terminal connection part 21 of the connection terminal 12 presses the upper surface of the terminal locking part 61 of the locking lance 58, and the stabilizer pieces 22, 23 are formed in the stabilizer guide grooves of the locking lance 58. It fits in the upper part of 63,64. Further, the terminal pressing portion 62 of the locking lance 58 bent outward contacts the rear surface of the lance support 37b, and the advance of the rear holder 14 is restricted.
[0017]
When the connection terminal 12 is further pushed in, the locking lance 58 is restored when the terminal connecting portion 21 exceeds the terminal locking portion 61 of the locking lance 58, and as shown in the lower part of FIG. While locking the rear end of the terminal connection portion 21, the stabilizer pieces 22, 23 are completely fitted into the guide grooves 63, 64, and the front edges of the stabilizer pieces 22, 23 are the front walls of the guide grooves 63, 64. It contacts the rear part of the terminal locking part 61. At the same time, the terminal pressing portion 61 of the locking lance 58 moves to a position where it can enter the upper surface of the lance support base 37b, and the rear part of the coating fixing portion 25 of the connection terminal 12 is located in front of the locking projection 57 of the rear holder 14. .
[0018]
When the rear holder 14 is pushed toward the housing 13 from such a state, the engagement state is established, and the terminal locking portion 61 of the locking lance 58 and the locking projection 57 of the lance main body 61 are connected to the terminal connecting portion 21 and the coating fixing portion. 25, the terminal pressing portion 61 of the locking lance 58 enters between the lower surface of the terminal connecting portion 21 and the lance support 37b, and the terminal pressing portion 61 presses the terminal connecting portion 21. Then, when the terminal connection portion 21 of the connection terminal 12 comes into contact with the front regulation portion 56, the advance of the connection terminal 12 is stopped. At this time, the guide projections 53 and 54 of the rear holder 14 abut against the front walls of the guide windows 38 and 39 of the housing, and the locking projections 55 and 56 respectively fit into the locking grooves of the housing 13. Engage with the engagement position.
[0019]
As described above, in the reference example, at both the temporary engagement position and the full engagement position of the rear holder 14, the side surface of the locking lance 58 comes into contact with the partition plate 31 via the stabilizer pieces 22 and 23. The lateral movement of the locking lance 58 can be restricted. In addition, the terminal locking portion 61 of the locking lance 58 locks the rear end of the terminal connection portion 21 and the front edges of the stabilizer pieces 22 and 23 lock the front walls of the guide grooves 63 and 64. The longitudinal movement of the connection terminal 12 can be restricted not only at the full engagement position but also at the temporary engagement position.
[0020]
FIG. 7 is a cross-sectional view of the embodiment, in which the connection terminal 71 is not provided with a stabilizer piece, but is provided with a terminal connection portion 72, a core wire fixing portion 73, and an electric wire coating fixing portion 74 in this order. In addition, the coating of the electric wire 11 is fixed by an electric wire coating fixing portion 74 having an increased outer diameter. On the other hand, at the base of the locking lance 84 of the holder main body 82 of the rear holder 81, a fixing portion fitting groove 83 into which the wire coating fixing portion 74 having a larger outer diameter is formed is formed. A terminal locking portion 85 for locking the rear end of the portion 72 is formed.
[0021]
In this embodiment, at the temporary engagement position and the full engagement position of the rear holder 81, the locking lance 84 locks the rear portion of the terminal connection portion 72 to restrict the rearward movement of the connection terminal 71, and The front wall of the fitting groove 83 locks the wire coating fixing portion 74 and regulates the forward movement of the connection terminal 71.
[0022]
【The invention's effect】
As described above, the connector according to the present invention can lock the terminal connection portion of the connection terminal by the locking lance provided on the rear holder, thereby restricting the rearward movement of the connection terminal. The forward movement of the connection terminal can be restricted by locking the wire coating fixing portion of the connection terminal by the provided groove portion, and in particular, a stable locking state of the connection terminal during the temporary engagement of the rear holder can be ensured. Becomes possible.
[Brief description of the drawings]
FIG. 1 is a sectional view of a reference example.
FIG. 2 is an exploded perspective view of a housing and a rear holder according to a reference example.
FIG. 3 is a partially enlarged perspective view of a locking lance of a reference example.
FIG. 4 is a perspective view of a temporary engagement position between a housing and a rear holder according to a reference example.
FIG. 5 is a perspective view of a full engagement position between a housing and a rear holder according to a reference example.
FIG. 6 is an operation explanatory view of the reference example.
FIG. 7 is a sectional view of the embodiment.
[Explanation of symbols]
12, 71 Connection terminal 13 Housing 14, 81 Rear holder 21, 72 Terminal connection part 25, 74 Wire coating fixing part 31 Partition plate 32 Terminal accommodating chamber 57 Locking projection 58, 84 Locking lance 62, 85 Terminal locking part 83 Fixed Part fitting groove

Claims (2)

The housing comprises a housing for accommodating a connection terminal to which an electric wire is fixed via an electric wire coating fixing portion in a terminal accommodating chamber, and a rear holder which is engaged with a rear portion of the housing at first and second engagement positions. A locking lance protruding toward the connecting lance, and a groove provided at a base of the locking lance. The locking lance restricts backward movement of the connection terminal, and the groove controls the wire coating fixing portion. A connector that stops and restricts forward movement of the connection terminal. The connector according to claim 1, wherein the locking lance has substantially the same width as the terminal receiving chamber.

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