JPH09153688A - Plug cord fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing structure allowing a plug cord to be easily inserted and fast holding it without damaging ribs if the cord is pulled. SOLUTION: A plug cord 1 is connected to the bottom face 3A of a recess 3 of a case 6. The recess 3 has a first and second side faces 3B and 3C round the face 3A, the faces 3B and 3C being mutually perpendicularly adjacent. A rotation stop rib protruding from the face 3A of the recess 3 is integratedly formed with the case 6. A drop-preventing rib 8 is fixed parallel to the side face 3C. The cord 1 inserted into a connector 9 and coupled therewith is inserted between the side face 3B and rib 7, bent along the face 3C from the face 3A and settled between the face 3C and rib 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug cord connecting structure for connecting a cord such as a power cord or a keyboard to an electric device.

[0002]

2. Description of the Related Art A plug cord connected to a case of an electric device should not be easily pulled out even if the cord is pulled.
Also, it is necessary to connect the plug so that excessive force does not act on the local part of the plug when pulled. In order to realize this, as shown in FIG. 1, a fixing structure in which a claw 2 for hooking the cord 1A is integrally formed in the vicinity of a portion connecting the plug cord 1 is adopted. Plug code 1 in this figure
In the fixing structure, the plug cord 1 is connected to the bottom surface 3A of the recess 3 provided in the case 6. An L-shaped claw 2 is integrally formed on the first side surface 3B, which is the side surface above the recess 3.
The plug cord 1 is connected to an outlet on the bottom surface 3A, and the cord 1A is hooked on the claw 2 and pulled out from the recess 3.

[0003]

In the plug cord fixing structure shown in FIG. 1, it is difficult to mold the claw 2. It is necessary to integrally mold the claw 2 when molding the plastic case 6 using a mold having a complicated structure. This is because the claw 2 is formed into an L-shape, so that the die cannot be easily removed. Further, as shown in FIG. 1, when the die for molding the L-shaped claw 2 is punched out, there is a drawback that a through hole 4 is formed in the first side surface 3B of the recess 3.

Further, in the fixing structure of this structure, since the plug cord 1 is put on the back side of the L-shaped claw 2 and hooked,
There is also a drawback that it takes a lot of time to hook the plug cord 1 on the nail 2, and there is also a drawback that if the plug cord 1 hooked on the nail 2 is strongly pulled, the nail 2 is easily damaged.

Further, a fixing structure shown in FIG. 2 has been developed as a structure for connecting the middle of the plug cord 1 to the case. The case 6 in this figure is provided with a groove-shaped recess 3, and ribs 5 are integrally formed on the opposite surfaces of the opening of the recess 3.
The fixed structure of this structure also has a drawback that it is difficult to insert the cord 1A of the plug cord 1 easily and it takes time to insert the plug cord 1. Further, there is a drawback that a through hole 4 is formed at the bottom of the recess 3 in order to remove the die for molding the rib 5.

The present invention was developed for the purpose of solving such a conventional drawback. An important object of the present invention is to provide a plug cord that can be mass-produced efficiently and inexpensively with a mold having a simple structure, can easily insert the plug cord, and can surely hold the plug cord, and can make the rib into a shape that is not easily damaged. To provide a fixed structure.

[0007]

In the structure for fixing a plug cord of the present invention, a recess 6 is provided in a case 6, and the plug cord 1 is connected to a bottom surface 3A of the recess 3. Further, the fixing structure of the plug cord of the present invention is characterized by having all the following structures. (A) The concave portion 3 of the case 6 has a first portion around the bottom surface 3A.
It has a side surface 3B and a second side surface 3C. (B) The bottom surface 3A, the first side surface 3B, and the second side surface 3C are adjacent surfaces that are orthogonal to each other. In the case of FIG. 3 showing a preferred embodiment of the present invention, in the figure, the upper surface of the recess 3 is the first side surface 3B and the left side surface of the recess 3 is the second side surface 3C. (C) A connector 9 for connecting the plug cord 1 is provided on the bottom surface 3A of the recess 3. (D) The rotation stopping rib 7 is protruded from the bottom surface 3A to form the case 6
It is integrally molded into. Further, the retaining rib 8 protruding from the first side surface 3B is integrally formed with the case 6. (E) The retaining rib 8 has a second portion so that the plug cord 1 pulled out along the bottom surface 3A can be bent and held at a right angle.
It is fixed parallel to the side surface 3C. (F) The plug cord 1 inserted into and connected to the outlet on the bottom surface 3A is inserted between the first side surface 3B and the rotation stop rib 7, and is bent along the second side surface 3C from the bottom surface 3A, It is configured to be inserted between the two side surfaces 3C and the retaining rib 8.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below exemplifies a plug cord fixing structure for embodying the technical idea of the present invention, and the present invention does not specify the plug cord fixing structure to the following.

Further, in this specification, for easier understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims column" and "to solve the problems." It is added to the members shown in the column of "means". However, the members described in the claims are not limited to the members of the embodiments.

In the structure for fixing the plug cord shown in FIGS. 3 to 5, the recess 3 is provided at the corner portion of the bottom surface of the case 6 of the charger or the like. The case 6 is made of plastic, and the recess 3 is formed by a mold for molding the case 6. The case 6 shown in FIG. 3 has openings on the lower side and the back side of the recess 3. The recess 3 is surrounded by a bottom surface 3A that connects the plug cord 1, a first side surface 3B located on the top surface of the recess 3, and a second side surface 3C that is the left surface of the recess 3 in FIG. Recess 3
The bottom surface 3A that surrounds the first side surface 3B and the second side surface 3C are adjacent surfaces that are orthogonal to each other.

As shown in FIG. 5, a connector 9 for connecting the plug cord 1 is fixed to the bottom surface 3A of the recess 3. The connector 9 is provided with a through hole for connecting the plug 1B of the plug cord 1. On the bottom surface 3A of the recess 3, a rotation stopping rib 7 is integrally formed with the case 6 so as to project horizontally from the surface.

The rotation stop rib 7 is formed in a shape having a wide width in the horizontal direction in order to hold the plug cord 1 in a posture of mounting it. The rotation stopping rib 7 puts the plug cord 1 on the upper surface thereof and prevents the rotation of the plug 1B connected to the connector 9. Plug the cord 1A of the plug cord 1 into the rotation stop rib 7
And the first side surface 3B to prevent rotation of the plug 1B. Therefore, the gap between the rotation stopping rib 7 and the first side surface 3B is made wider than the thickness of the plug cord 1 so that the plug cord 1 can be easily inserted therein. However, the distance between the rotation stopping rib 7 and the first side surface 3B may be substantially the same as the thickness of the plug cord 1. The rotation stopping ribs 7 having an interval substantially equal to the thickness of the plug cord 1 can reliably support the plug cord 1.

The first side surface 3B of the recess 3 has a retaining rib 8 formed integrally with the case 6 so as to project downward from the surface. The retaining rib 8 is provided in a posture parallel to the second side surface 3C, in other words, extending in the pulling direction of the plug cord 1 shown by the arrow A in FIG. The retaining rib 8 has this shape in order to provide sufficient strength against the tensile force of the plug cord 1.

The distance between the retaining rib 8 and the second side surface 3C is substantially equal to the thickness of the cord 1A of the plug cord 1. This is to prevent displacement of the plug cord 1 inserted here. However, even if the distance between the retaining rib 8 and the second side surface 3C is made slightly larger than the thickness of the plug cord 1, the plug cord 1 bent at a right angle at the boundary between the bottom surface 3A and the second side surface 3C.
Is prevented from being displaced by its restoring force and by being mounted on the rotation stopping rib 7. Therefore, in the present specification, the phrase "the distance between the retaining rib 8 and the second side surface 3C is substantially equal to the thickness of the plug cord 1" means that the rib is bent at a right angle and is disposed between the rotation stopping rib 7 and the first side surface 3B. Installed plug cord 1
Means an interval at which the retaining rib 8 does not come off.

The narrower the distance between the retaining rib 8 and the second side surface 3C, the more the retaining rib 8 can hold the plug cord 1 so as not to be displaced. However, it becomes more difficult to insert the plug cord 1 as this interval is narrowed. Therefore,
The gap between the retaining rib 8 and the second side surface 3C is designed to have a width that can prevent displacement of the plug cord 1 and can be easily inserted. Since this interval changes depending on the thickness and flexibility of the plug cord 1, it is designed to have an optimum value in consideration of the type of the plug cord 1.

The height of the retaining rib 8 is higher than the thickness of the plug cord 1, for example, the thickness of the plug cord 1 so that the plug cord 1 can be sandwiched and held between the second rib 3C and the second side face 3C. It is designed to be higher than 1.5 times and not to protrude from the bottom surface 3A of the case 6. Further, the height of the retaining rib 8 is designed to be higher than the distance between the rotation preventing rib 7 and the first side surface 3B. The height of the rotation stop rib 7 is designed so that the plug 1B does not rotate when the plug cord 1 is placed on it.

In the structure for fixing the plug cord shown in the drawing, the plug 1B is inserted into the connector 9 provided on the bottom surface 3A of the recess 3, and the cord 1A is inserted between the first side face 3B and the rotation stopping rib 7.
It is inserted between the retaining rib 8 and the second side surface 3C. The plug cord 1 inserted here is bent at a right angle at the boundary between the bottom surface 3A and the second side surface 3C, and the rotation stopping rib 7 and the first side surface 3B are formed.
The retaining rib 8 and the second side surface 3C hold the rib in place. Particularly, the plug cord 1 is prevented from coming out between the rotation stopping rib 7 and the first side face 3B by the retaining rib 8, and the plug cord 1 is prevented from coming out between the retaining rib 8 and the second side face 3C by the rotation preventing rib 7. Therefore, the plug cord 1 can be held at a fixed position so as not to come off.

In the plug cord fixing structure shown in the figure, a recess 3 is provided on the bottom surface of the case 6. However, in the plug cord fixing structure of the present invention, the recess 3 does not necessarily have to be provided on the bottom surface of the case 6. For example, as shown in FIG.
It can also be provided on the side surface of the case 6.

[0019]

The plug cord fixing structure of the present invention has the following excellent features. Using a die with a simple structure, it is possible to mass-produce inexpensively and efficiently. This is because the fixing structure of the present invention holds the plug cord by hooking it on the L-shaped claw as in the conventional case or by inserting the plug cord between the ribs provided on the opposite surfaces of the recess. Not the bottom of the recess and the first
This is because the rib is formed on the side surface and the plug cord is held by the two ribs. For example, in the fixing structure of the present invention, the retaining rib is formed by a die that demolds the recess in the direction indicated by arrow B in FIG. 4, and the rotation stopping rib is formed by a die that demolds in the direction indicated by arrow C in FIG. Can be easily molded. The mold for forming the retaining rib and the rotation preventing rib can be divided at the position shown by the chain line in the figure.

The plug cord can be easily inserted. In the fixing structure of the plug cord of the present invention, the rotation preventing rib and the retaining rib prevent the displacement of the plug cord from each other, so that the interval for inserting the plug cord does not need to be so narrow, and the rotation preventing rib is not necessary. This is because it is not necessary to form the retaining ribs into an L-shape or the like in which it is difficult to insert the plug cord. The plug cord connected to the outlet is inserted between the rotation stop rib and the first side surface, bent at a right angle and inserted between the removal prevention rib and the second side surface so as not to be displaced. The plug cord supported in this position is prevented from coming off from the stopper rib by the rotation stop rib,
The stopper rib prevents the stopper rib from coming off the rotation stopper rib. Therefore, there is a feature that the plug cord can be inserted easily without being pulled out.

The rib is unlikely to be damaged when the plug cord is pulled. This is because there is no through hole in the vicinity of the rib and the retaining rib can be formed by extending in the pulling direction of the plug cord.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a conventional plug cord fixing structure.

FIG. 2 is a perspective view showing another conventional fixing structure of a plug cord.

FIG. 3 is a perspective view showing an embodiment of a plug cord fixing structure of the present invention.

FIG. 4 is a rear view of the plug cord fixing structure shown in FIG.

FIG. 5 is a bottom view of the plug cord fixing structure shown in FIG. 3;

FIG. 6 is a perspective view of a plug cord fixing structure according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plug cord 1A ... Cord 1B ... Plug 2 ... Claw 3 ... Recess 3A ... Bottom surface 3B ... 1st side surface 3C ... 2nd side surface 4 ... Through hole 5 ... Rib 6 ... Case 7 ... Rotation stop rib 8 ... Stop rib 9 ... connector

Claims (1)

[Claims] 1. A case (6) is provided with a recess (3), and a plug cord (1) is connected to a bottom surface (3A) of the recess (3),
Further, a plug cord fixing structure characterized by having all of the following structures. (A) The recess (3) of the case (6) has a first side surface (3B) and a second side surface (3C) around the bottom surface (3A). (B) The bottom surface (3A), the first side surface (3B) and the second side surface (3C) are adjacent surfaces that are orthogonal to each other. (C) A connector (9) for connecting the plug cord (1) is provided on the bottom surface (3A) of the recess (3). (D) Rotation stop rib (7) protruding from the bottom surface (3A) of the recess (3)
Is integrally formed with the case (6), and the retaining rib (8) is integrally formed with the case (6) by protruding from the first side face (3B). (E) The retaining rib (8) is fixed parallel to the second side face (3C). (F) The plug cord (1) inserted into and connected to the outlet on the bottom surface (3A) is inserted between the first side surface (3B) and the rotation stop rib (7), and the bottom surface (3A) to the second side surface. It is configured to be bent along (3C) and to be inserted between the second side face (3C) and the retaining rib (8).