JPH0729762U - Waterproof connector - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure waterproofness even if the wire is pulled sideways. [Structure] The waterproof connector is composed of a connector housing 1 and a retainer 3 that prevents a terminal 2 inserted into a terminal accommodating chamber 5 in the housing 1 via a rubber plug 7 for sealing from coming off. A retainer 3 is formed with an insertion groove 14 through which the electric wire 6 is inserted, and an opening edge of the insertion groove 14 is opposed to the insertion groove 14 and holds a part of the electric wire 6 along the outer peripheral edge thereof. The holding portion 15 is projected. on the other hand,
At the rear opening edge of the terminal accommodating chamber 5, a housing-side holding portion 9 that holds a region of the outer peripheral edge of the electric wire 6 to which the retainer-side holding portion 15 does not correspond is projected. As a result, the electric wire 6 is held by the holding portions 9 and 15 on both the housing side and the retainer side over substantially the entire circumference, so that no matter which direction the electric wire 6 is pulled, a pulling force is applied to the sealing rubber plug 7. Does not work, ensuring waterproofness.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a waterproof connector.

[0002]

[Prior art]

 In a general connector, a plurality of terminal accommodating chambers are formed inside the housing, and terminals are inserted from the rear. Among such connectors, particularly in connector housings used in places where waterproofness is required, measures are taken for waterproofing at the rear of the terminals inserted into the terminal accommodating chamber. One of such techniques is disclosed in Japanese Utility Model Laid-Open No. 61-26272. In this product, a cylindrical rubber plug is fitted to the electric wire connected to the terminal, and the entire circumference is closely attached to the hole wall of the terminal accommodating chamber to ensure the sealing property. In addition, a retainer is attached to the rear of the connector housing to prevent the terminals from coming off. The retainer has a locking claw that can be attached and detached by engaging the housing side. In addition, slits that open downward are formed in parallel in the retainer so that they can be inserted in the direction orthogonal to these while avoiding interference with each electric wire. A pair of flexible protrusions are formed on the opening edge of the slit so as to sandwich the slit. This pushes the rear end of the rubber stopper and clamps the wire from both left and right sides for about half the circumference. I am able to do that.

[0003]

[Problems to be solved by the device]

 By the way, an electric wire drawn out from the connector may be drawn out laterally for wiring reasons. Then, the electric wire receives a pulling force to the side, and the influence of the electric wire may reach the rubber plug, thereby creating a gap between the electric wire and the inner wall of the terminal accommodating chamber. In a situation like this, in the case where a flexible projection is provided as in the above publication, the wire is held behind the rubber stopper only for the protruding length, so it is tentatively pulled by the rubber stopper. It can be said that the action of force has been eliminated.

However, although it is effective when the flexible projection is pulled out in the direction in which it is provided, the projection cannot be provided in the direction orthogonal to this, so that depending on the direction in which the wire is pulled out, a rubber stopper may be used. There is a concern that a gap may be created between the terminal receiving chamber and the terminal receiving chamber due to the influence of the pulling force, and the sealing performance cannot be secured.

The present invention has been developed and devised in view of the above problems, and an object thereof is to provide a waterproof connector in which the waterproof property is ensured even when the wire is pulled out.

[0006]

[Means for Solving the Problems]

 To achieve the above object, the structure of the present invention includes a housing having a terminal accommodating chamber for accommodating terminals therein, a detachable mount at a rear portion of the housing, and a seal from the terminal accommodating chamber. In a waterproof connector including a retainer with a wire insertion groove formed by cutting in a direction orthogonal to the drawing direction of the wire drawn through the rubber plug for inserting the wire, the wire insertion groove of the wire insertion groove A retainer-side holding portion that holds a part of the wire protrudes along the outer peripheral edge of the electric wire, while a retainer-side retainer part of the outer peripheral edge of the electric wire is formed on the rear opening edge of the terminal accommodating chamber. It is characterized in that a housing-side holding portion that holds a region that the holding portion does not correspond is formed to project.

[0007]

[Action]

 After inserting the terminal into the terminal accommodating groove of the housing, insert the retainer into the housing with each electric wire pulled out from the housing inserted through the slit of the retainer in a comb shape. Then, the retainer side holding portion surrounds and holds the electric wire in a predetermined range of the outer peripheral edge thereof, and the remaining range is held by the housing side holding portion. Therefore, almost the entire circumference of the wire is held by the cooperation of both the retainer-side and housing-side holding portions.

[0008]

[Effects of the Invention] The effects of the present invention are as follows. Since the electric wire is held by both the retainer side and housing side holding parts and holds almost the entire circumference of the electric wire, these can be held even if the electric wire is pulled out in any angle direction, and the rubber for sealing is used. It is possible to eliminate the situation in which a gap is created between the stopper and the inner wall of the terminal accommodating chamber and the sealing property is deteriorated.

[0009]

【Example】

 Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a state in which the waterproof connector of this example is disassembled. As shown in FIG. 1, the waterproof connector is for preventing the connector housing 1 and the terminals 2 inserted in the connector housing 1 from coming off. It is composed of a retainer 3.

A square tubular hood portion 4 is formed in the front portion of the connector housing 1, and can be fitted to a mating connector housing 1 (not shown). Further, inside the connector housing 1, a plurality of terminal accommodating chambers 5 (three rows in each of the upper and lower stages in the figure) are formed, and the terminals 2 are accommodated in the respective interiors. The terminal 2 is fixed to the tip of the electric wire 6 by caulking, and a rubber plug 7 for sealing is fitted on the electric wire 6 continuously to the rear portion of the terminal 2. The rubber plug 7 is provided with a seal protrusion 8 which is in close contact with the hole wall of the terminal accommodating chamber 5 and which is formed integrally with the front and rear and annularly. The terminal 2 formed in this way is inserted from the rear side (front side in FIG. 1) of the terminal accommodating chamber 5. A housing-side holding portion 9 for holding the pulled-out portion of the electric wire 6 is arranged at the rear opening edge of the terminal accommodating chamber 5.

Each housing-side holding portion 9 is composed of a pair of holding pieces 9 a and 9 b which vertically protrude from the rear opening edge of each terminal accommodating chamber 5. However, in the housing side holding portions 9 corresponding to the upper and lower sides, the upper and lower intermediate holding pieces 9b, which are common to them, are integrated. Further, in each housing-side holding portion 9, a holding surface 9c having an arc shape is formed on the inner peripheral surfaces of both holding pieces 9a so as to follow the outer peripheral surface of the electric wire 6, and in the present example, the outer peripheral surface of the electric wire 6 is formed. It is set so that it can hold an angle range of approximately 90 ° to the plane symmetrically from the top and bottom. A step 16 is formed between the holding surface 9c and the terminal accommodating chamber 5 as shown in FIG. 3, so that the holding surface 9c approaches the electric wire 6 as close as possible.

Next, the retainer 3 will be described. The retainer 3 is formed in the rear portion of the connector housing 1 so that it can be fitted between the projecting edges 10 a and 10 b projecting from both upper and lower edges. However, the lower projecting edge 10b of the projecting edges 10a and 10b is flexibly deformable, and a locking projecting edge 19 is formed there. It can be engaged with a claw edge 21 formed on the edge.

A pair of locking arms 11 which can be flexibly deformed extend from both side edges of the retainer 3, and a window 12 is opened in both locking arms 11 to project to a side surface of the connector housing 1. It can be engaged with and disengaged from the protruding portion 13. Further, the retainer 3 is provided with three electric wire insertion grooves 14 shown in the drawing in a comb-like shape that opens downward, and the above-described two partition pieces 20 are formed in the middle. Then, two electric wires 6 can be inserted into each of the electric wire insertion grooves 14 in the vertical direction. Further, the wire insertion grooves 14 communicate with the upper and lower pairs of the terminal accommodating chambers 5 when the retainer 3 is mounted on the connector housing 1.

Further, two retainer holding portions 15 are arranged above and below, respectively, on the surface of each wire insertion groove 14 facing the connector housing 1. Each retainer holding portion 15 is composed of a pair of left and right holding pieces 15a, and a holding surface 15b is formed on the inner peripheral surface thereof along the outer peripheral surface of the electric wire 6. That is, the retainer holding portion 15 is arranged orthogonal to the housing side holding portion 9, and as shown in FIG. 4, the housing side holding portion 9 can surround almost the entire circumference of the electric wire 6. It is like this. Further, as shown in the figure, the retainer holding portion 15 is arranged closer to the electric wire 6 than the housing side holding portion 9, and its holding surface is in close contact with the outer peripheral surface of the electric wire 6. Further, when the retainer 3 is attached to the connector housing 1, as shown in FIG. 2, the tip ends of both holding pieces 15a of the retainer holding portion 15 project into the terminal accommodating chamber 5, and the tip end surface thereof is located behind the rubber plug 7. A pressing surface 15c for pressing the end is formed.

Next, the function and effect of this example configured as described above will be specifically described. When assembling the waterproof connector of this example, first insert the terminal 2 into each terminal accommodating chamber 5 from the rear side and engage with the elastic locking piece (not shown) provided in the terminal accommodating chamber 5. By doing so, it is temporarily locked. At this time, each rubber plug 7 is brought into close contact with the inside of the terminal accommodating chamber 5, and each electric wire 6 is pulled out from the terminal accommodating chamber 5 rearward. Next, in the rear of the connector housing 1, a pair of upper and lower wires 6 are inserted through the respective wire insertion grooves 14 of the retainer 3. Then, the retainer 3 is slid along the electric wire 6 toward the connector housing 1 and the window portions 12 of both locking arms 11 are engaged with the corresponding convex portions 13, so that the retainer 3 is fixed to the connector housing 1. It Then, as described above, the tip side of the holding piece 15a of the retainer holding portion 15 projects into the terminal accommodating chamber 5 and the pressing surface 15c abuts the rear end surface of the rubber plug 7 to prevent the terminal 2 from coming off (two Next stop state).

As shown in FIG. 4, when the retainer 3 is mounted, the electric wire 6 holds the upper and lower regions of the electric wire 6 by approximately 90 ° by the both holding pieces of the housing side holding portion 9 and the retainer holding portion. Both holding pieces 15a of 15 hold an area of the electric wire 6 on the left and right sides by approximately 90 degrees. Therefore, the holding portions 9 and 15 on the housing / retainer side cooperate to hold almost the entire circumference of the electric wire 6, so that the electric wire 6 can be maintained in a held state even if the electric wire 6 is pulled in any direction of 360 °. . Therefore, the influence of the pulling of the electric wire 6 does not affect the rubber plug 7, and the sealing property with the terminal accommodating chamber 5 is maintained.

By the way, although the holding portions 9 and 15 are arranged on the connector housing 1 side and the retainer 3 side in this example, from the viewpoint of surrounding the outer peripheral surface of the electric wire 6 along the entire circumference, only the housing 1 side is provided. It is also possible to project a cylindrical holding part in the. However, it is easier to insert the terminal 2 into the two members as in this example, as compared with the above case, and the mold structure for molding is simple.

The present invention can be modified in various ways. For example, in the present embodiment, the electric wire 6 is inserted into the electric wire insertion groove 14 of the retainer 3 from above, but the electric wire 6 is formed from the side. However, such a thing is also included in the gist of the present invention.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a waterproof connector.

FIG. 2 is a cross-sectional view showing a holding portion.

FIG. 3 is a vertical sectional view showing a holding portion.

FIG. 4 is a sectional view showing how electric wires are held by both holding portions.

FIG. 5 is a perspective view showing an assembled state of the waterproof connector.

FIG. 6 is a front view of the retainer as seen from the inside.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Connector housing 2 ... Terminal 3 ... Retainer 5 ... Terminal accommodating chamber 7 ... Rubber stopper 9 ... Housing side holding part 14 ... Electric wire insertion groove 15 ... Retainer side holding part

Claims (1)

[Scope of utility model registration request] 1. A housing in which a terminal accommodating chamber for accommodating a terminal is formed, and a housing detachably attached to a rear portion of the housing and pulled out from the terminal accommodating chamber through a rubber stopper for sealing. A waterproof connector comprising a retainer formed by cutting in a direction orthogonal to the direction of pulling out the electric wire and having an electric wire inserting groove into which the electric wire can be inserted, wherein an edge portion of the electric wire inserting groove extends along an outer peripheral edge of the electric wire. While the retainer-side holding portion that holds a part of the electric wire protrudes, the housing-side holding that holds a region of the outer peripheral edge of the electric wire that the retainer-side holding portion does not correspond to at the rear opening edge of the terminal housing chamber A waterproof connector having a protruding portion.