JPH0652746A - Cord bushing - Google Patents

Abstract

PURPOSE:To provide enough resistance force against pulling-out force by setting means, pushing a cord clamping body relatively into a bushing main body through fastening a screw, in the bushing main body and the cord clamping body. CONSTITUTION:A bushing main body 12 is pushed into the fitting hole 11 of a panel 10 so that the rib 26 of the bushing main body 12 is fitted to the notch 25 of the fitting hole 11. The edge portion of the fitting hole 11 is fitted between a snap portion 21 and the flange 15 of the main body 12 so that a cord bushing 9 is fixed to the panel 10 temporarily. The snap portion 21 is touched to the edge portion of the fitting hole 11 so as to be deformed inward elastically. After a cord 8 is passed through the cylinder portion 19 of the main body 12 and is inserted through the passing-through hole 29 of a cord clamping body 13, a screw 14 is screwed in. Then the cord clamping body 13 is pushed into the main body 12 relatively. As the cord clamping body 13 is pushed into the main body 12, the divided portion 28 of the cord clamping body 13 is slid along an inside conical face 18 so that the diameter thereof is decreased, and the cord can be fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cord bushing used for pulling a cord to the outside in various electric / electronic devices.

[0002]

2. Description of the Related Art When a power cord connected to the inside of an electric or electronic device is pulled out to the outside, damage to the outer skin of the cord between the cord and a hole provided in a mounting body such as a panel of the device,
A cord bushing is used for the purpose of preventing the cord from moving in the length direction, but the cord bushing shown in FIG. 7 has been invented as one in which a driver is inserted and the cord is fixed by screwing. In the cord bushing 1 shown in FIG. 7, an elastic tongue piece 3 is provided in the inside 2, a screw 7 is arranged in a through hole 6 provided from the outer peripheral portion 4 to the inner peripheral portion 5, and the screw 7 is screwdriver. To the inside 2 by pushing the tongue piece 3 with the screw 7
The cord 8 is pressed against the cord 8 to fix the cord 8 so that the screw tightening work can be performed in a small space.

[0003]

However, since this is one in which the cord 8 is pressed and fixed from one direction, the cord is fixed so as to have sufficient resistance to the pulling force applied from the outside. It was difficult. The present invention is
It was made to solve the above problems,
An object of the present invention is to provide a cord bushing capable of fixing a cord so that a screw tightening operation can be performed in a small space and the cord has a sufficient resistance to a pulling force applied from the outside.

[0004]

The present invention employs the following constitution in order to achieve the object. In other words, the tubular bushing body having a means for attaching to the panel and the collet-shaped cord tightening body that slides the cord in the bushing body in the axial direction and inserts the cord therein are substantially the same as the pull-out direction of the cord. The bushing body and the cord tightening body are provided with means for pushing the cord tightening body relatively into the bushing body by tightening the screw, and the cord tightening body enters the bushing body. The inner conical surface is formed so that the mouth converges along the direction.

Further, it is preferable that the inner conical surface of the cord tightening body is eccentrically formed so as to have a small inclination at a position distant from the screw and to have a large inclination at a position close to the screw. Further, it is preferable that a sliding groove is formed in a cord fastening body insertion port in the bushing body, and a guide fitted to the sliding groove is projected on an outer peripheral portion of the cord fastening body. Further, the means for attaching the bushing body to the panel comprises at least two or more snap parts, the sliding groove is formed so as to be located inside the snap part, and the snap part is attached to the panel before tightening the cord. It is desirable that the guide is elastically deformed inward when temporarily fixed in the mounting hole, and is pushed outward by the guide when the cord fastening body is pushed in.

[0006]

According to the present invention, the cord-shaped cord tightening body is relatively pushed into the bushing body by inserting the cord into the cord tightening body and then inserting the screwdriver to tighten the screw. Since the collet-shaped cord tightening body abuts on the inner conical surface of the bushing body and slides, the diameter of the cord tightening body is reduced to uniformly press the cord from all directions.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a usage state of an embodiment of a cord bushing. 2 and 3 are vertical cross-sectional views showing a usage state of an embodiment of the cord bushing, FIG. 2 showing before the cord is tightened and FIG. 3 showing after the cord is tightened. FIG. 4 is a perspective view showing an embodiment of the bushing body of the cord bushing. FIG. 5 is a partially cutaway plan view of FIG. FIG. 6 is a partially cutaway plan view of FIG.

The cord bushing 9 has a cylindrical bushing body 12 having means for attaching to a mounting hole 11 provided in the panel 10 and an axial slide in the bushing body 12 to insert the cord 8 therein. It comprises a collet-shaped cord tightening body 13 and a screw 14.

The bushing body 12 has a hollow cylindrical shape, and the cord tightening body 1 is provided at one end with the flange 15 as a boundary.
3 has an insertion port 16 and is formed with an insertion tube 17 to be inserted into the mounting hole 11 of the panel 10, and the cord fastening body 1 is provided at the other end.
The cylindrical portion 19 having the inner conical surface 18 with the convergent mouth along the approaching direction of 3 and the screw receiving step portion 20 are in parallel contact with each other. The insertion cylinder 17 is provided with a pair of snap portions 21, and the flange 15 is provided between the snap portions 21 so that the mounting hole 1 of the panel 10 is provided.
One edge can be held. Also, the insertion tube 17
A sliding groove 22 is formed on the inner surface of the above so as to be positioned inside the snap portion 21. Further, the inner conical surface 18 has a small slope 23 farther from the screw receiving step portion 20 and a larger slope 24 near the screw receiving step portion 20. Further, a rib 26 is formed on the outer peripheral portion of the insertion tube 17 to fit the notch 25 for rotation prevention provided in the mounting hole 11 of the panel 10.

The cord tightening body 13 is collet-shaped and has a plurality of slits 28 formed at the tip 27 of the bushing body 12 on the insertion side. A through hole 29 for inserting the cord 8 is formed inside the tip of the slit 28. Screw 1 in the same direction as the pulling out direction of the cord toward the side opposite to 27.
4 forms a projection 31 with a blind hole 30 into which 4 is screwed. Further, a guide 32 that fits in the sliding groove 22 provided on the bushing body 12 is provided on the outer peripheral portion.

Next, a method of using the code bushing 9 of the present invention will be described. As shown in FIG. 2, the cord tightening body 13 is inserted into the cord tightening body insertion opening 16 of the bushing main body 12 so that the guide 32 fits in the sliding groove 22 with the slit 28 at the head. The tip of the screw 14 is pushed until it comes into contact with the inner conical surface 18 in the bushing body 12, and the screw 14 is slightly screwed into the blind hole 30 of the cord tightening body 13 through the screw receiving step portion 20. Then, the bushing body 12 is inserted and pushed into the mounting hole 11 of the panel 10 so that the rib 26 of the bushing body 12 fits into the notch 25 of the mounting hole 11, and eventually the snap portion 2
The edge portion of the mounting hole 11 is fitted between 1 and the flange 15 of the bushing body 12, and the cord bushing 9 is temporarily fixed to the panel. At this time, as shown in FIG. 5, the snap portion 21 comes into contact with the edge portion of the mounting hole 11 and is elastically deformed inward. Then, after inserting the cord 8 through the cylindrical portion 19 of the bushing body 12 into the through hole 29 of the cord tightening body 13 and inserting the screw 14 into the through hole 29 of the cord tightening body 13, the cord tightening body 13 is relatively moved. Is pushed into the bushing body 12 and the slit 28 of the cord tightening body 13 slides along the inner conical surface 18 as it is pushed, so that the diameter is reduced and the cord can be fixed as shown in FIG.

Further, with the above-mentioned pushing, the guide 32 of the cord tightening body 13 is pushed in while sliding in the sliding groove 22 of the bushing body 12, and eventually the guide 32 reaches the inside of the snap portion 21 and is inwardly moved. Since the snap portion 21 that has been elastically deformed toward the outside is pushed out toward the edge of the mounting hole 11 of the panel as shown in FIG. 6, the cord bushing 9 should be firmly fixed to the panel 10. You can

Further, the inner conical surface 18 of the cord tightening body 13 is eccentrically formed so that the inclination 23 at a position far from the screw 14 becomes small and the inclination 24 at a position near the screw becomes large. Since the sliding resistance at the distance from the screw 14 at the time of reducing the diameter becomes small, the guide 32 fits into the sliding groove 22 and slides in parallel with the sliding so that smooth tightening can be performed. There is.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the means for attaching to the panel 10 is the snap portion 21, but the attachment flange is extended and screwed. Alternatively, it may be fixed with an adhesive. Further, in the above-described embodiment, the reduced diameter portion of the cord tightening body 13 is formed by the plurality of slits 28, but it is sufficient if there is at least one slit, and it may be wound into a coil.

[0015]

Since the present invention is configured as described above, it has the following effects. According to the invention of claim 1, by tightening the screws arranged in substantially the same direction as the pulling-out direction of the cord, the screw tightening work can be performed in a small space and the cord tightening body is reduced in diameter to be uniform in all directions. Since the cord can be fixed by pressing to, it is possible to fix the cord so that it has sufficient resistance to the pulling force applied from the outside.

According to the second aspect of the present invention, since the inner conical surface of the cord tightening body is eccentrically formed so that the inclination of the inner conical surface of the cord constricting portion is small and the inclination of the inner conical surface of the cord constricting portion is large, Since it is possible to make the sliding resistance near and far from the screw when screwing in and reducing the diameter almost even, it is possible to perform smooth tightening. According to the invention of claim 3, the cord tightening body slides in parallel with the inside of the bushing body by the guide of the cord tightening body fitted into the sliding groove of the bushing body and sliding. It can be carried out. According to the invention of claim 4, when the bushing body is inserted into the mounting hole of the panel and temporarily fixed by the snap portion before tightening the cord, the bushing body is elastically deformed inward, and when the cord is tightened, the inside of the snap portion is tightened. When the guide of the cord tightening body reaches, the snap portion is pushed outward by the guide and it is pushed into the edge of the mounting hole of the panel, so even if a strong pulling force is applied to the cord from the outside, the cord pushing will be done from the panel. There is no worry of coming off.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a usage state of an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a usage state of an embodiment of the present invention before tightening the cord.

FIG. 3 is a vertical cross-sectional view showing a usage state of an embodiment of the present invention after tightening a cord.

FIG. 4 is a perspective view showing an embodiment of the present invention.

FIG. 5 is a partially cutaway plan view of FIG.

FIG. 6 is a partially cutaway plan view of FIG.

FIG. 7 is a vertical cross-sectional view showing a usage state of a conventional example.

[Explanation of symbols]

 9 cord bushing 10 panel 12 bushing body 13 cord tightening body 14 screw 15 flange 16 cord tightening body insertion opening 18 inner conical surface 21 snap portion 22 sliding groove 28 slit 29 through hole 30 blind hole 32 guide

Claims (4)

[Claims] 1. A tubular bushing body having a mounting means for mounting on a panel, and an axially slidable inside of the bushing body,
Collet-shaped cord tightening body that inserts the cord inside,
The bushing body and the cord tightening body are provided with means for relatively pushing the cord tightening body into the bushing body by tightening the screw. A cord bushing that has an inner conical surface with a convergent mouth along the approach direction of the cord tightening body. 2. The inner conical surface of the cord tightening body is formed so as to be eccentric so as to have a small inclination at a position distant from the screw and a large inclination at a position near the screw. Code bushing. 3. A sliding groove is formed on the cord fastening body insertion port side in the bushing main body, and a guide fitted to the sliding groove is projectingly provided on an outer peripheral portion of the cord fastening body. Claim 1,
The code bushing of claim 2. 4. The means for attaching the bushing body to the panel comprises at least two snap parts, the sliding groove is formed so as to be located inside the snap part, and the snap part is formed before tightening the cord. The cord bushing according to claim 3, wherein the cord bushing is elastically deformed inward when temporarily fixed in the mounting hole of the panel, and is pushed outward by the guide when the cord tightening body is pushed in.