JPS58222597A - Cord bushing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a cord bushing that protects the cord by inserting it through a hood such as a power supply hood and attaching it to the main body of an electric appliance.Generally, it is used in hand-held electric appliances such as hair dryers. Doing so may cause the power cord to be twisted or bent, causing the core wire to break, especially at the cord outlet of the appliance.
Conventionally, in order to prevent this, the outer periphery of the power cord 1 was covered and protected with a bellows-shaped bushing 2 as shown in Fig. 1, but it was not possible to completely prevent the core wire from breaking. has not yet been reached.

In addition, recent hair dryers tend to have extremely high power consumption in order to improve their drying performance, and as a result, large sparks are generated at the breakage point of the core wire 1, and this spark is caused by the coating of the power cord 1. 1a and the thin walled portion of the bushing 2 and scattered in the direction of arrow A in FIG. 1, which was extremely dangerous.

The present invention was made in view of the above problems, and its purpose is to provide a cord bushing that improves safety by preventing sparks from scattering to the outside even if the cord is broken.

Embodiments of the present invention will be described below based on the drawings.

2 to 4 show a first embodiment, in which a power supply hood 1
The cord bushing 2 through which the cord is inserted is made of an elastic material such as rubber or PVC, and is formed integrally with the cover 1a of the power supply hood 1 by simultaneous molding, and is inserted into the cord outlet 8a of the appliance main body 8.
It comprises a first cylindrical part 4 to be fitted and a second cylindrical part 5 protruding from the electric appliance main body 8, and the first cylindrical part 4 forms a flange 4a at one end thereof and also forms a hanging ring 4b. However, the flange 4a is fitted and locked onto the electrical appliance main body 8.

Further, the second cylindrical portion 5 is formed into a bellows shape by connecting a plurality of first rings 5a with a thin second ring 5b, thereby making it easy to bend. Furthermore, the inner diameter of the second cylindrical portion 5 is made larger than the inner diameter of the first cylindrical portion 4, and a space is created between the inner circumferential surface of the second cylindrical portion 5 and the outer circumferential surface of the power cord 1. It forms part 6.

The elasticity of the cord bushing 2 allows the power cord 1 to
Even if the core wire 1b is twisted or bent, the core wire 1b is prevented from breaking at the cord outlet 0 part, and in the unlikely event that the core wire 1b
Even if the wire breaks and the spark breaks the W i a of the power cord 1 and the spark jumps out of the power cord 1, the inner circumferential surface of the second cylindrical portion 5 of the hood bushing 2 and the outer circumferential surface of the power cord 1 The force of the spark is rapidly weakened in the space 6 formed between the cord bushing 2 and the cord bushing 2.

5 and 6 show a second embodiment, in which the power cord 1
A cord bushing 2 having seven ring portions 7 integrally formed on the outer periphery of the cord bushing 2 and into which the power cord 1 is slidably inserted.
A recess 8 is formed at the end of the first cylindrical portion 4, and the recess 8
The power cord 1 is fixed to the bushing 2 by fitting the 7 ring portion 7 to the bushing 2, thereby preventing the power cord 1 from coming off from the appliance main body 8.

In general, the hood bushing 2 is formed integrally with the power cord 1 by simultaneous molding in order to fix the power cord 1 to the appliance main body 8, but in order to form the space 6, the hood bushing 2 is formed integrally with the power cord 1. In the first embodiment, there is a problem in that the mold structure is complicated and it is difficult to mold the power cord 1 and the hood bushing 2 at the same time. This problem is solved by forming a seven-ring portion 7 that locks onto the second ring.

As described above, the present invention provides a hood bushing that protects the hood by inserting a cord into the main body of the electrical appliance and attaching the hood to the main body of the electrical appliance. a second cylindrical part protruding from the main body, the inner diameter of the second cylindrical part is larger than the inner diameter of the first cylindrical part, and the inner peripheral surface of the second cylindrical part and the outer periphery of the cord Since a space is formed between the second cylinder part and the hood, the spark generated when the hood core wire breaks is weakened by the space formed between the second cylinder part and the hood, and the hood bushing is damaged. This improves safety by preventing sparks from scattering to the outside.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional example, FIG. 2 is a perspective view showing a first embodiment of the present invention, and FIG. 8 is a partially sectional front view showing a state in which the above bushing is attached to the main body of an electric appliance. Fig. 4 is a sectional view taken along line E-B in Fig. 8, Fig. 5 is a perspective view showing a second embodiment of the present invention, and Fig. 6 is a partial view showing the state in which the above bushing is attached to the main body of the electric appliance. It is a cross-sectional front view. 1... Power supply hood, 2 fists/cord bushing, 8... Electrical appliance body, 8a11 @ cord outlet, 4... First cylindrical part, 5... Second cylindrical part, 5a... First ring, 5b・
・Second ring, 6b space, 7... flange, 8 fist/recess. Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Toshimaru Takemoto (and 2 others) Figure 1 Figure 2 Figure 5

Claims (1)

[Claims] 1) A hood bushing through which a cord is inserted and attached to an electric appliance body to protect the cord, the hood bushing comprising a first cylindrical portion that fits into a cord outlet of the electric appliance body; a second cylindrical part protruding from the main body of the electric appliance, the inner diameter of the second cylindrical part is larger than the inner diameter of the first cylindrical part, and the inner circumferential surface of the second cylindrical part and the cord A hood bushing characterized in that a space is formed between the hood bushing and the outer peripheral surface of the hood bushing. 2), characterized in that seven ring portions are formed integrally with the cord on the outer periphery of the cord, and a recess into which the seven ring portions are fitted is formed at the end of the first cylindrical portion of the hood bushing. A hood bushing according to claim 1. 8) The cord bushing according to claim 1, wherein the second cylindrical portion is formed in a bellows shape by connecting a plurality of first rings with a thin second ring.