JP2008300318A - Connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a through-hole with a lumping rubber stopper from causing a deviation from a cavity. <P>SOLUTION: In a lumping rubber stopper 20, there is formed a plurality of guide cylinders 24 in such a form that a plurality of through-holes 21 are individually extended frontward, the cylinders being individually inserted into a plurality of cavities 11 from their rears. In the step of terminal fittings 40 being inserted into the plurality of through-holes 21 in sequence, even if alignment of a back-end side portion of a through-hole 21 subjected to no insertion is deviated with respect to the cavities 11, the guide cylinders 24 extended frontward from the through-hole 21 are fitted into the back-end portions of the cavities 11. Accordingly, the terminal fitting 40 are inserted into the cavities 11 smoothly without obstruction of an opening edge of an inlet of the cavities 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a connector.

Patent Document 1 discloses a connector in which a batch rubber plug is attached to the back surface of a housing in which a plurality of cavities are formed. The batch rubber plug has a plurality of through holes corresponding to the number of cavities of the hood mask, and each through hole is penetrated by a terminal fitting and a wire connected to the rear end thereof. In the state where it is attached, the inner periphery of the through hole is in close contact with the outer periphery of the electric wire, so that waterproofing is achieved.
JP 2001-85104 A

In the conventional connector described above, since the terminal fittings are sequentially passed through the plurality of through-holes one by one, the meat around the through-hole that has already been penetrated is an unpenetrated through-hole adjacent to the through-hole. The hole is pressed, and the alignment of the non-through hole is shifted with respect to the cavity. This positional deviation of the through hole with respect to the cavity is not corrected even after the terminal fitting and the electric wire have been passed through the through hole, so there is a concern that the terminal fitting that has passed through the through hole is caught on the mouth edge of the inlet of the cavity. .
The present invention has been completed based on the above-described circumstances, and an object thereof is to prevent the through-holes of the batch rubber plug from being displaced with respect to the cavity.

  As a means for achieving the above object, the invention of claim 1 is a housing in which a plurality of cavities are formed, and is assembled to cover the rear end surface of the housing, and corresponds to the plurality of cavities. A lump rubber stopper in which a plurality of through holes are formed, a terminal fitting inserted through the through hole from the rear and inserted into the cavity, and a rear end of the terminal fitting are connected to the through hole. In the connector provided with the densely pierced electric wires, the collective rubber plug has a form in which the plurality of through holes are individually extended forward, and individually from the rear with respect to the plurality of cavities. It has a feature in that a plurality of guide tube portions to be fitted into is formed.

The invention of claim 2 is characterized in that, in the invention of claim 1, the outer periphery of the guide tube portion is in a form of surface contact with the inner periphery of the cavity.
A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the inner periphery of the guide tube portion is in a liquid-tight contact with the outer periphery of the electric wire. Have

<Invention of Claim 1>
In the process of sequentially inserting the terminal fittings into the plurality of through holes, even if the alignment of the rear end side portion of the non-inserted through hole is displaced with respect to the cavity, the guide tube portion extending forward from the through hole is not Since it is inserted into the rear end of the cavity, the terminal fitting is smoothly inserted into the cavity without being caught by the opening edge of the entrance of the cavity.

<Invention of Claim 2>
When a small rib-like protrusion that is relatively easily deformed elastically is formed on the outer periphery of the guide tube portion, the guide tube portion is displaced with respect to the cavity along with the elastic deformation of the protrusion. In the present invention, since the outer periphery of the guide tube portion is in surface contact with the inner periphery of the cavity, there is no portion that is easily elastically deformed locally. Therefore, there is no possibility that the guide tube portion is displaced from the normal position with respect to the cavity.

<Invention of Claim 3>
The electric wire is penetrated through the through hole and the inner periphery of the guide tube portion, but not only the inner periphery of the through hole but also the inner periphery of the guide tube portion is liquid-tightly adhered to the outer periphery of the electric wire, Sealing performance is improved.

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The connector A according to the first embodiment includes a housing 10, a collective rubber plug 20, and a holder 30.
The housing 10 is made of a synthetic resin and has a flat block shape as a whole. A plurality of cavities 11 for inserting the terminal fittings 40 from the rear are formed in the housing 10 so as to be aligned vertically and horizontally. In the rear end portion of the cavity 11, that is, the region serving as the insertion opening for the terminal fitting 40, the cross-sectional shape perpendicular to the insertion direction of the terminal fitting 40 forms a vertically long square.

  The collective rubber plug 20 has a horizontally long oval shape, and is assembled to the housing 10 so as to cover the entire formation range of the cavity 11 on the rear end surface and in close contact with the rear end surface of the housing 10. The collective rubber plug 20 is formed with a plurality of through holes 21 individually corresponding to the plurality of cavities 11 aligned vertically and horizontally. Each through hole 21 has a circular cross-sectional shape perpendicular to the through direction (front-rear direction), and a plurality of lip portions 22 extending in the circumferential direction are spaced in the through direction on the inner periphery of the through hole 21. It is formed with a gap. Further, on the outer periphery of the collective rubber plug 20, a lip portion 23 is formed that adheres in a liquid-tight manner to the inner periphery of the hood portion of a mating connector (not shown).

  The collective rubber plug 20 is integrally formed with a plurality of guide tube portions 24 protruding forward. Each guide cylinder part 24 is a form in which the through hole 21 is extended forward, and is arranged to correspond to each cavity 11 individually. The outer periphery of each guide cylinder portion 24 is composed of upper, lower, left, and right flat surfaces, and the cross-sectional shape is a vertically long rectangle, and is fitted to the rear end portion of the cavity 11 without backlash. The hollow inside of the guide cylinder portion 24 is a circular guide hole 25 that is concentric with the through hole 21 and has the same diameter as the through hole 21. Lip portions 26 are formed at intervals in the penetrating direction.

  Further, the batch rubber plug 20 is integrally formed with a plurality of positioning cylinder portions 27 protruding rearward. Each positioning cylinder part 27 is a form in which the through-hole 21 is extended rearward, and is arranged to correspond to each cavity 11 individually. The outer periphery of each positioning cylinder part 27 is composed of upper, lower, left and right flat surfaces like the guide cylinder part 24, and the cross-sectional shape is a vertically long square. The hollow inside of the positioning cylinder portion 27 is a circular insertion hole 28 that is concentric with the through-hole 21 and has the same diameter as the through-hole 21. Lip portions 29 are formed at intervals in the penetrating direction.

  The holder 30 is made of a synthetic resin and has a horizontally long oval shape like the batch rubber plug 20. A plurality of positioning holes 31 corresponding to the through holes 21 are formed in the holder 30 so as to be aligned vertically and horizontally, and each positioning hole 31 has a vertically long rectangular cross section perpendicular to the through direction. It has become. The holder 30 is assembled from the rear of the collective rubber plug 20 and is assembled to the housing 10 by engaging the elastic locking pieces 32 at both left and right ends with the locking portions 12 of the housing 10. In the assembled state, the collective rubber plug 20 is held in the assembled state by being sandwiched between the rear end surface of the housing 10 and the front surface of the holder 30. In addition, the positioning cylinder portion 27 is inserted into each positioning hole 31 from the front side without any backlash.

  A terminal fitting 40 is attached in the housing 10 from the rear. The terminal fitting 40 is of a well-known shape that has a male shape in which a tab 41 is formed at a front end portion that is elongated in the front-rear direction as a whole. The electric wire 42 having a circular cross section is connected to the rear end portion of the terminal fitting 40 so as to be conductive, and the connected electric wire 42 extends backward from the terminal fitting 40.

  The terminal fitting 40 is inserted into the cavity 11 from the rear after the batch rubber plug 20 and the holder 30 are assembled to the housing 10. At the time of insertion, the terminal fitting 40 is inserted into the insertion hole 28 of the positioning cylinder portion 27 fitted in the holder 30, inserted through the through hole 21 and the guide hole 25, and accommodated in the cavity 11. In the process in which the terminal fitting 40 passes, the through hole 21 of the batch rubber plug 20 is elastically expanded vertically and horizontally, so that the center of the through hole 21 adjacent thereto is eccentric vertically or horizontally with respect to the cavity 11. There is a concern that the position may be shifted.

However, in the present embodiment, the guide tube portion 24 in a form in which the through hole 21 is extended forward is fitted into the rear end portion of the cavity 11 without rattling in the vertical and horizontal directions, and the through hole 21 is moved backward. Since the positioning cylinder portion 27 in the extended form is fitted into the positioning hole 31 of the holder 30 without any vertical or horizontal play, there is no possibility that the through hole 21 is displaced in the vertical and horizontal directions.
Even if the through hole 21 is displaced, the guide hole 25 continues to the through hole 21, and the guide cylinder portion 24 in which the guide hole 25 is formed is fitted into the rear end portion of the cavity 11. Therefore, there is no possibility that the terminal fitting 40 that has passed through the eccentric through-hole 21 hits or gets caught by the opening edge on the rear end side of the cavity 11 (opening edge of the inlet of the cavity 11). In addition, since the guide tube portion 24 is fitted so as not to be displaced with respect to the cavity 11, the guide hole 25 is also maintained in a state where it is not displaced with respect to the cavity 11. Therefore, the terminal fitting 40 that has passed through the eccentric through-hole 21 is corrected in positional deviation when passing through the guide hole 25, and there is no possibility of being caught on the inner wall of the cavity 11.

  As described above, in the present embodiment, a plurality of guides that are individually extended from the rear to the plurality of cavities 11 are configured such that the plurality of through holes 21 are individually extended forward in the batch rubber plug 20. A cylindrical portion 24 is formed. Thereby, in the process of sequentially inserting the terminal fittings 40 into the plurality of through holes 21, even if the alignment of the rear end side portion of the non-inserted through holes 21 is deviated from the cavity 11, the terminal fittings 40 are It can be smoothly inserted into the cavity 11 without being caught on the opening edge of the entrance of the cavity 11.

  In addition, when a small rib-like protrusion that is relatively elastically deformable, such as a lip part, is formed on the outer periphery of the guide cylinder part 24, the guide cylinder part 24 moves into the cavity 11 along with the elastic deformation of the protrusion. However, in this embodiment, since the outer periphery of the guide tube portion 24 is in surface contact with the inner periphery of the cavity 11, there is a portion that is easily elastically deformed locally. do not do. Therefore, there is no possibility that the guide tube portion 24 is displaced from the normal position with respect to the cavity 11.

  In addition, the electric wire 42 penetrates through the through hole 21 and the inner periphery of the guide tube portion 24, but the inner periphery of the guide tube portion 24 is formed with respect to the outer periphery of the electric wire 42 by forming a lip portion 26. Therefore, not only the inner periphery of the through-hole 21 but also the inner periphery of the guide cylinder portion 24 comes into close contact with the outer periphery of the electric wire 42 in a liquid-tight manner. Thereby, the sealing performance is improved. Furthermore, a lip portion 29 is also formed in the insertion hole 28 of the positioning cylinder portion 27, and this lip portion 29 also adheres to the electric wire 42 in a liquid-tight manner, so that the sealing performance is further improved.

  Moreover, since the guide cylinder part 24 and the cavity 11 which are mutually fitted have a square cross section, there is no possibility that the guide cylinder part 24 rotates or twists in the circumferential direction with respect to the cavity 11. Similarly, since the positioning cylinder part 27 and the positioning hole 31 that are fitted to each other are both rectangular in cross section, there is no possibility that the positioning cylinder part 27 rotates or twists in the circumferential direction with respect to the holder 30.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIG. The collective rubber plug 50 of the connector B of the second embodiment is different from the connector A of the first embodiment in that a lip portion is not formed on the inner periphery of the guide hole 51 and the insertion hole 52. Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals, and descriptions of structures, operations, and effects are omitted.

<Embodiment 3>
Next, a third embodiment of the present invention will be described with reference to FIG. The connector C of the third embodiment is different from the connector A of the first embodiment in that the positioning cylinder portion 27 is not formed in the batch rubber stopper 60 and the positioning hole 31 of the holder is not formed. Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals, and descriptions of structures, operations, and effects are omitted.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The cross-sectional shape of the outer periphery of the guide tube portion is not limited to a square, and may be a circle, an ellipse, an oval, or the like.
(2) A waterproof lip portion extending in the circumferential direction may be formed on the outer periphery of the guide tube portion.
(3) In the third embodiment, the inner periphery of the guide cylindrical member may be in a non-contact or non-waterproof state with respect to the outer periphery of the electric wire.

Longitudinal sectional view of Embodiment 1 Horizontal section Rear view of housing Front view of batch rubber stopper Rear view of batch rubber stopper Longitudinal cross section of a lump rubber stopper Horizontal cross section of the lump rubber stopper Longitudinal sectional view of the batch rubber stopper of the second embodiment Longitudinal sectional view of a batch rubber stopper of Embodiment 3

Explanation of symbols

A ... Connector 10 ... Housing 11 ... Cavity 20 ... Batch rubber plug 21 ... Through hole 24 ... Guide cylinder B, C ... Connector 50, 60 ... Batch rubber plug

Claims (3)

A housing having a plurality of cavities formed therein;
A batch rubber plug assembled to cover the rear end surface with respect to the housing and formed with a plurality of through holes corresponding to the plurality of cavities;
A terminal fitting inserted into the cavity through the through-hole from behind,
In the connector that is connected to the rear end of the terminal fitting and includes an electric wire penetrating the through hole in a liquid-tight manner,
The collective rubber plug is formed with the plurality of through-holes individually extended forward, and has a plurality of guide tube portions that are individually inserted into the plurality of cavities from the rear. Features a connector.   2. The connector according to claim 1, wherein an outer periphery of the guide tube portion is configured to be in surface contact with an inner periphery of the cavity.   The connector according to claim 1 or 2, wherein an inner periphery of the guide tube portion is in a liquid-tight contact with an outer periphery of the electric wire.

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