JPH0656778B2 - Structure of cord connector - Google Patents

Description

The present invention relates to a structure of a cord connector such as a retaining cord connector.

[Prior Art] As shown in FIG. 5, in a cord connector, a body 2a made of thermosetting resin and a cover 2b made of thermosetting resin are placed on top of each other to clamp and fix a blade receiving spring 5 in the body 2b. To form a core 1 and cover the surface of the core 1 with a shell made of a thermoplastic resin such as soft vinyl chloride. A socket 8 for inserting a plug blade to be inserted into the blade receiving spring 5 is provided. Since the receptacle cover 9 is formed by butting the half-split covers integrally formed on the body 2a and the cover 2b, the line L of the butted portion is exposed to the outside, and the body 2a and the cover 2b are misaligned. There is a problem that the line L is displaced and becomes ugly as shown in FIG. 6 depending on variations in dimensional accuracy. Therefore, the body 2a and the cover 2b
Although various jigs were made in the assembling process in order to prevent the deviation of the work, it took many man-hours, but the cost was increased accordingly.

Therefore, as shown in FIG. 7, a block in which the left and right blade receiving springs 5 are sandwiched between a body 2a and a cover 2b having a common shape,
Assembly screw 1 inserted into the bottomed tubular receptacle cover 9
There is provided one in which 6 is inserted through an insertion hole 17 provided in the body 2a and the cover 2b and fixed to the receptacle cover 9.

As shown in FIG. 8, the left and right blade receiving springs 5 are arranged on the body 2a, and the body 2a is fitted with the receiving port cover 9 in the fitting recess 15 provided at the front end of the body 2a.
There is also provided a cover (not shown) having a common shape and fixing the body 2a and the cover with a stud or the like.

[Problems to be Solved by the Invention] However, in the conventional example shown in FIG. 7, a gap is apt to occur between the body 2a and the cover, and the dimensional accuracy between the body 2a and the cover and the receptacle cover 9 is further improved. Is the cover 9
It is difficult to obtain the fitting accuracy due to the draft of the side, and the block including the body 2a and the cover and the receiving port cover 9
There is a problem that it is difficult to fit with and the secondary molding material flows into the interior through the gap when molding the shell.

FIG. 8 shows a conventional example in which the body 2a and the fitting recess 1 of the cover are
5 and the fitting cover 1 when fitting the receptacle cover 9
If there is no allowance between 5 and the receptacle cover 9 and there is variation in dimensional accuracy, it becomes difficult to fit them, and when viewed from the front of the receptacle cover 9, the front end of the body 2a (cover) and the receptacle cover 9 are It is necessary to mold so as to see the butting line of the body 2a and to cover the front end surface X of the body 2a (cover) when forming the shell 13, so that the injection pressure is applied to the front end surface X of these bodies 2a (cover). The body 2a (cover) is pushed in the direction of the arrow to increase the gap in the Y portion of the fitting recess 15. Also body 2a (cover)
Since the burrs are formed on the end surface Z of the resin, burrs are generated on the end surface Z. As a result, it is extremely difficult to prevent the secondary molding resin from flowing into the core 1 due to the burrs and the quality is unstable. Met.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a structure of a cord nectar having an improved appearance design and an improved quality performance of a receptacle. There is.

In addition to the above object, an object of the invention of claim 2 is to provide a structure of a cord connector which prevents the secondary molding material from flowing into the core during shell molding.

[Means for Solving the Problems] In order to achieve the above object, the invention according to claim 1 is
By mounting the cover on the body, the fitting spring stored in the body is clamped and fixed between the body and the cover, and the receiving port cover is fitted and fixed to the opening formed at the front end of the body and the cover. The surface of the body and the cover is covered with a shell formed by secondary molding so that the front surface of the receptacle cover is exposed.

According to a second aspect of the present invention, in the first aspect of the invention, the front end face of the body and the cover is covered with a brim formed over the entire circumference at the peripheral portion of the receptacle cover exposed to the front outside from the opening. In addition, the fitting of the receiving port cover with the body and the cover is uneven fitting, and the uneven fitting surface is an inclined surface.

[Operation] According to the first aspect of the present invention, the blade receiving spring housed in the body is clamped and fixed between the body and the cover by wearing the cover on the body. The receiving end cover is fitted and fixed to the opening formed at the front end, and the front end surface of the body and the cover is covered with the brim formed over the entire circumference at the peripheral portion of the receiving end cover exposed to the front outside from the opening. Since the body and the surface of the cover are covered with a shell formed by secondary molding so that the front surface of the cover is exposed, the gap between the cover and the body and the gap may affect the cover of the cover. Therefore, there is no variation in quality between different electrodes, and the level of appearance is improved. Moreover, the user can feel a sense of security because the shift is not visible at the receiving port.

Further, since the receiving cover is formed separately from the body and the cover, dimensional accuracy is not strictly required for the body and the cover, and the die cost and the assembly cost can be reduced.

According to the second aspect of the present invention, it is possible to absorb variations in the fitting accuracy of the fitting portions of the body and the cover and the receiving port cover with the inclined surface of the concave-convex fitting, and when the shell is secondarily molded, the receiving port. The front surface of the collar of the cover can receive the secondary molding injection pressure to reduce the gap between the fitting surfaces of the concave and convex fittings. Therefore, the dimensional accuracy of the parts is not strictly required, and the mold accuracy is particularly high. Also, stable quality can be obtained without having to increase the assembly accuracy.

[Examples] The present invention will be described below with reference to Examples.

FIG. 1 shows an embodiment of a cord connector having a retaining function, and the core 1 has a body 2a made of a thermosetting resin molded product and a cover 2b having the same shape as the body 2a as shown in FIG. It is constructed by fixing with studs 4 that are abutted against each other and can be inserted into a through hole 3 provided in the center of the both, and the blade receiving springs 5 with stoppers are provided in the left and right storage recesses 14 provided on the bottom surface of the body 2. The blade receiving spring 5 is housed and the blade receiving spring 5 is sandwiched between the bodies 2a and 2b.

The blade receiving spring 5 is U-shaped and is formed by curving both side pieces 5a and 5b in an arc shape, and the tip is slightly opened, and a plug plug blade of a power plug such as a U plug inserted from the opened portion ( (Not shown) is elastically sandwiched between both side pieces 5a and 5b, and when the plug blade is moved along the arcuate surface of both side pieces 5a and 5b, the side piece 5a is inserted into the hole provided in the plug blade. A protrusion-like retainer 6 formed on the inner surface is engaged with the retainer in a detachable manner to prevent the plug plug blade from coming off, and has the same structure as a blade receiving spring of a conventional retainer outlet.

Here, a terminal plate 7 for connecting an electric wire as a cord connector is fixed to the rear surface of the central piece of the blade receiving spring 5 by tacking. Electric wire connecting portion 7 formed at the rear end of the terminal board 7
a is exposed to the outside through a groove 19 formed in an end portion of one end wall of the body 2a and the cover 2b.
It is clamped and fixed by b.

Further, the receiving port cover 9 having the receiving port 8 for inserting the plug stopper blade corresponding to the blade receiving spring 5 is fitted at the front end opening portion of the body 2a (cover 2b) at the rear end portion by concave and convex fitting,
It is sandwiched and fixed by the body 2a and the cover 2b.

Here, the body 2a into which the rear portion of the receptacle cover 9 is fitted
As shown in FIG. 3, a fitting convex portion 11a is provided on the inner peripheral portion of the front end opening of the (cover 2b), and the joint convex portion 11a is fitted on the outer periphery of the receptacle cover 9 over the entire circumference. The fitting concave portion 11b for forming the fitting concave portion 11b is formed so that both inner surfaces of the fitting concave portion 11b are inclined with the same slope, and both side surfaces of the fitting convex portion 11a are inclined so as to come into contact with the inclined surface of the fitting concave portion 11b. It's a face. Further, the collar 12 is integrally projected on the outer peripheral surface of the receptacle cover 9 on the front side of the fitting recess 11b, and when the receptacle cover 9 is clamped and fixed to the body 2a and the cover 2b as described above, the collar 12 is fixed to the body 2a. The front end surface of the cover 2b is positioned so as to be covered when viewed from the front. The bottom surface and the opening edge of the fitting recess 11b are straight portions on the upper, lower, left and right sides of the receptacle cover 9 as shown in FIG. It is possible to easily improve the precision when manufacturing the mold.

Then, the core 1 in which the electric wire 20 is fixed to the electric wire connecting portion 7a of the terminal board 7 is put into the secondary molding die, and the secondary molding made of a thermoplastic resin such as soft vinyl chloride is coated so as to cover the surface of the core 1. When the shell 13 is secondarily molded with the material, the retaining cord connector is completed. During this secondary molding, the secondary molded material is the collar 12 of the receiving port cover 9 and the body 2a.
Also, a peeling prevention hole 21 formed at an appropriate position on the boundary with the front end portion of the cover 2b is filled to connect the core 1 and the shell 13 to prevent peeling.

[Effect of the invention] According to the invention of claim 1, the blade receiving spring housed in the body is clamped and fixed between the body and the cover by wearing the cover on the body, and is formed at the front end portion of the body and the cover. The receiving end cover is fitted and fixed to the opening, and the front end surface of the body and the cover is covered with the brim formed over the entire circumference at the peripheral part of the receiving end cover exposed to the front outside from the opening, and the receiving end is covered. Since the body and the surface of the cover are covered with the shell for secondary molding so that the front surface of the cover is exposed, the gap between the cover and the body and the gap do not affect the receptacle of the receptacle cover. This has the effect of eliminating the variation in quality between different poles and further improving the level of appearance and design. In addition, the fact that no deviation is visible at the receptacle will give the user a sense of security. There is an effect. Further, since the receiving cover is formed separately from the body and the cover, dimensional accuracy is not strictly required for the body and the cover, and the die cost and the assembly cost can be reduced.

According to the second aspect of the present invention, the variation in fitting accuracy of the joint portion between the body and the cover and the receptacle cover can be absorbed by the inclined surface of the concave-convex fitting, and the collar of the receptacle cover is formed when the shell is secondarily molded. The front surface of the mold can receive the secondary molding injection pressure to reduce the gap between the fitting surfaces of the concave and convex fittings, so that the dimensional accuracy of the parts is not strictly required, and the mold accuracy is particularly high, You do n’t have to be precise
The effect that stable quality is obtained is exhibited.

[Brief description of drawings]

FIG. 1 (a) is a front view of an embodiment of the present invention, FIG. 1 (b) is a partially cutaway and omissible bottom view of the same, and FIG. 1 (c) is partially cutaway and omissible of the same. A bottom view, FIG. 1 (d) is a rear view of the same, which can be partially broken, and FIG.
Is a front view of the same core, FIG. 2 (b) is a side sectional view of the same, FIG. 2 (c) is a side view of the same core, and FIG. 2 (d).
Is a bottom view of the same core, FIG. 2 (e) is a rear view of the same core, FIG. 3 (a) is a top view of the body (cover), and FIG. 3 (b) is FIG. a) AA sectional view, 4th
Figure (a) is a side view of the above-mentioned receptacle cover that can be partially broken,
FIG. 4 (b) is a front sectional view of the same as above, FIG. 5 (a) is a front view of a core of a conventional example, and FIG. 5 (b) is a partially cutaway and partially omitted bottom view of the same. c) is a side view of the above, FIG. 6 is an explanatory view of the receiving part of the same, FIG. 7 (a) is a front view of another conventional receiving cover, and FIG. Fig. 7 (c) is a side view of the body part of the above,
FIG. 7 (d) is a rear view for explaining the attachment, and FIG. 8 is a side sectional view of another conventional example. . Reference numeral 1 is a core, 2a is a body, 2b is a cover, 5 is a blade receiving spring, 9 is a receiving opening, 9 is a receiving opening cover, 11a is a fitting convex portion, 11b is a fitting concave portion, 12 is a collar, and 13 is a shell.

Claims (2)

[Claims] 1. A cover is attached to a body to clamp and fix a blade receiving spring housed in the body between the body and the cover, and an opening formed at a front end of the body and the cover. The structure of the cord connector is characterized in that the surface of the body and the cover are covered with a shell formed by secondary molding so that the front surface of the receiving port cover is exposed. 2. A body and a front end surface of the cover are covered with a brim formed over the entire circumference at a peripheral portion of the receptacle cover exposed to the outside from the opening, and the receptacle cover is fitted to the body and the cover. The structure of the cord connector according to claim 1, wherein the fitting is a concave-convex fitting and the concave-convex fitting surface is an inclined surface.