JPH0543483U - Connector locking mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] The connector locking mechanism allows the connector to be easily removed and the complete insertion of the connector to be confirmed easily. [Structure] When the connector 11 is inserted into the plug 10, the hooking portion 12d of the locking spring 12 is projected outward from the outer surface of the connector 11, and a jig such as a driver is hooked. A notch 10g is provided on the outer surface above the locking projection 10c of the plug 10 to check whether the hooking portion 12d projects outward from the outer surface of the connector 11 while the connector 11 is being inserted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a connector locking mechanism.

[0002]

[Prior Art]

 Conventionally, as shown in FIG. 10, for example, a substantially U-shaped locking spring 3 is fitted on the outer surface of the connector 1, and the middle of the rising portions 3a, 3a of the locking spring 3 is inserted into the opening of the connector 1. Face 1a from the inside. Further, locking projections 2a, 2a are provided on the outer surface of the plug 2. Then, when the connector 1 is inserted into the plug 2, the rising portions 3a, 3a of the locking spring 3 ride on the locking projections 2a, 2a of the plug 2 and are opened outward, and then the locking projections 2a, 2a. A locking mechanism has been proposed that locks the connector 1 to the plug 2 by dropping it in the rear part (see Japanese Utility Model Laid-Open No. 62-152379).

On the other hand, when the connector 1 is pulled out from the plug 2 at the time of maintenance, the locking spring 3 is detached from the connector 1 with a jig such as a screwdriver and unlocked.

[0004]

[Problems to be solved by the device]

 However, when the connector 1 and the plug 2 are for an injector of an automobile engine, the clearance between the connector 1 and the head cover of the engine is very narrow, which makes it difficult to remove the locking spring 3. was there. In addition, when inserting the connector 1 into the plug 2, there is also a problem that it cannot be easily confirmed that the connector 1 is completely inserted up to the lock position.

Therefore, an object of the present invention is to provide a connector locking mechanism capable of easily removing the connector and confirming complete insertion of the connector.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, according to the present invention, a substantially U-shaped locking spring is fitted on the outer surface of a connector, and the middle of the rising portion of the locking spring is made to face the inner surface from the opening of the connector. , A locking mechanism of a connector that is locked by a locking projection on the outer surface of the plug, the locking projection protruding inward inward from the outer surface of the plug in the middle of the rising portion of the locking spring. It is characterized in that a hook portion is provided at the tip of the rising portion of the locking spring so as to project outward in a substantially U-shape. Further, a notch can be provided on the outer surface above the locking projection of the plug.

[0007]

[Action]

 According to the connector locking mechanism of the present invention, when the connector is inserted into the plug, the locking convex portion of the locking spring rides on the outer surface of the plug and is opened outward, and then the locking projection of the plug is further mounted. After opening outward, the connector is locked to the plug by falling into the rear part of the locking projection.

At this time, since the locking convex portion of the locking spring rides on the outer surface of the plug, the hooking portion projects outward from the outer surface of the connector. By hooking the tool, the locking spring can be easily removed from the connector. Further, before the connector is inserted into the plug, the hook portion only slightly protrudes from the outer surface of the connector, so that there is no problem that the locking spring is accidentally disengaged from the connector by being caught by something. Furthermore, if a notch is provided on the outer surface above the locking projection of the plug, the locking projection of the locking spring will not ride on the outer surface of the plug during the insertion of the connector and will not open outward. As a result, the hooking portion also does not project outward from the outer surface of the connector, so that it is possible to easily confirm whether or not the connector is completely inserted into the locked position by looking at the protruding state of the hooking portion.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. As shown in FIGS. 6 and 7, the plug 10 has, for example, a fixing portion (not shown) fixed to an injector of an automobile engine and a square plug portion 10a. The locking projections 10c and 10c are integrally formed on the outer surfaces 10b and 10b, and the positioning projection 10e is integrally formed on one outer surface 10d between the outer surfaces 10b and 10b.

As shown in FIGS. 3 to 5, the connector 11 includes a rectangular tubular connector portion 11a to be inserted into the outer surface of the plug portion 10a of the plug 10 and a cylindrical support portion 11b for supporting the tip portion of the harness. And have. Locking grooves 11d and 11d, into which the locking projections 10c and 10c of the plug 10 are fitted in from the inserting direction, are integrally formed on the inner surfaces 11c and 11c of the connector portion 11a which face each other. A positioning groove 11f into which the positioning protrusion 10e of the plug 10 is inserted from the inserting direction is integrally formed on one inner surface 11e between the two.

On the front sides of the outer surfaces 11g, 11g corresponding to the inner surfaces 11c, 11c of the connector part 11a, slit-shaped openings 11h, 11h are formed to penetrate the inner surfaces 11c, 11c and the locking grooves 11d, 11d. Has been done.

On the other hand, as shown in FIGS. 1 and 2, in the locking spring 12, the base portion 12a is bent in a substantially U shape, and the rising portions 12b, 12b are formed in a substantially L shape from both ends of the base portion 12a. When bent, the base portion 12a and the rising portions 12b and 12b are bent in a substantially U-shape when viewed from the plane of FIG.

Locking protrusions 12c and 12c, which are bent in a substantially V shape and project inward, are provided in the middle of the respective rising portions 12b and 12b of the locking spring 12, and the rising portions 12b described above are provided. Hooking portions 12d, 12d, which are bent in a substantially U shape and project outward, are provided at the tips of the and 12b. It should be noted that the plane of FIG. 1 has the locking spring 12 in a free state, and is deformed as shown by a chain double-dashed line in FIG.

With the above configuration, in order to fit the locking spring 12 into the connector 11, the base 12a is applied to the outer surface 11i of the connector 11a, and the rising portions 12b and 12b are opened outward to lock. The convex portions 12c, 12c are fitted into the openings 11h, 11h of the outer surfaces 11g, 11g, and the tips of the hook portions 12d, 12d are locked to the outer surface 11k.

At the time of this fitting, the locking projections 12c, 12c of the locking spring 12 project from the openings 11h, 11h inwardly of the inner surfaces 11c, 11c. In other words, the plug portion 10a of the plug 10 projects inward from the outer surfaces 10b and 10b. Further, the hooking portions 12d, 12d only slightly project from the outer surfaces 11g, 11g because the locking projections 12c, 12c project inward of the inner surfaces 11c, 11c. Therefore, before the connector 11 is inserted into the plug 10, there is no possibility that the hooking portions 12d, 12d will be caught by something and the locking spring 12 will accidentally fall off from the connector 11.

Next, when the connector 11 is inserted into the plug 10, the locking projections 10c and 10c of the plug 10 are fitted into the locking grooves 11d and 11d of the connector 11, and the positioning projection 10e is fitted into the positioning groove 11f. go.

Then, the locking projections 12c, 12c of the locking spring 12 ride on the outer surfaces 10b, 10b of the plug 10 and are opened outward, and then ride on the locking projections 10c, 10c of the plug 10, After further opening to the outside, the locking projections 10c, 10c fall into the rear portions of the locking projections and are locked, whereby the connector 11 is locked to the plug 10.

At the time of this locking, the locking projections 12c, 12c of the locking spring 12 are in a state of riding on the outer surfaces 10b, 10b of the plug 10, so that the hooking portions 12d, 12d project more than the outer surfaces 11g, 11g. (Refer to the chain double-dashed line in Fig. 3.) Therefore, during maintenance, you can easily remove the locking spring 12 from the connector 11 by hooking a jig such as a screwdriver on the hooks 12d, 12d to unlock it. You can

On the other hand, as shown in FIGS. 8 and 9, when the notches 10g, 10g are provided on the outer surfaces 10b, 10b of the plug 10 above the locking projections 10c, 10c, the connector 11 is plugged into the plug 10. Since the engaging projections 12c, 12c of the engaging spring 12 do not ride on the outer surfaces 10b, 10b of the plug 10 during the insertion into the plug, the engaging springs 12c, 12c do not open outward, and the hooking parts 12d, 12d of the engaging spring 12 also connect to the connector. The outer surfaces 11g and 11g of 11 do not protrude much outward. Therefore, by observing the protruding state of the hook portions 12d, 12d, it is possible to easily confirm whether or not the connector 11 is completely inserted to the lock position.

[0020]

[Effect of the device]

 As is clear from the above description, the connector locking mechanism of the present invention, when the connector is inserted into the plug, the hooking portion projects outward from the outer surface of the connector, so that a jig such as a driver can be hooked. This allows the locking spring to be easily removed from the connector. Further, since the hooking portion does not project from the outer surface of the connector before the connector is inserted into the plug, there is no problem that the locking spring is accidentally detached from the connector. Furthermore, if a notch is provided on the outer surface above the locking projection of the plug, the hook will not protrude outward from the outer surface of the connector while the connector is being inserted. You can easily check whether the is completely inserted into the locked position.

[Brief description of drawings]

FIG. 1 is a plan view of a locking spring of the present invention.

FIG. 2 is a rear view of FIG.

FIG. 3 is a plan view of the connector.

FIG. 4 is a front view of FIG.

FIG. 5 is a bottom view of FIG.

FIG. 6 is a front view of the plug.

FIG. 7 is a front view of FIG.

FIG. 8 is a plan view of a plug of another embodiment.

9 is a front view of FIG.

FIG. 10 is a front view of a lock mechanism of a conventional connector.

[Explanation of symbols]

 10 Plug 10c Locking Protrusion 10g Cutout 11 Connector 11h Opening 12 Locking Spring 12b Rise 12c Locking Convex 12d Hook

Claims (2)

[Scope of utility model registration request] 1. A substantially U-shaped locking spring is fitted on the outer surface of the connector, and the middle of the rising portion of the locking spring is made to face the inner surface from the opening of the connector to lock the outer surface of the plug. A locking mechanism for a connector to be locked by a projection, wherein a locking projection protruding substantially inward from the outer surface of the plug is provided in the middle of the rising portion of the locking spring. A locking mechanism for a connector, wherein a hooking portion that projects outward in a substantially U-shape is provided at the tip of the rising portion of the stop spring. 2. The lock mechanism for a connector according to claim 1, wherein a cutout portion is provided on an outer surface of the plug above the locking projection.