JPS6240464Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an attachment device for attaching a spiral tube cord to a housing, and more particularly to a housing attachment device for a spiral tube cord that is effective for connecting a handset and a housing of a public telephone.

Conventionally, a spiral tube cord has been used as one of the connection cords for connecting a handset and a public telephone housing, and the cord is inserted into a stretchable spiral tube formed by spirally winding a thin stainless steel plate. ing. The end of the helical tube cord is attached to the housing by screwing in a cylindrical mounting fitting 2 that engages with the helical groove 1 of the helical tube, as shown in Fig. 1. This was accomplished by inserting the fitting into a hole 5 formed in the casing 4 and tightening a nut 6 from the inside of the casing 4 onto the threaded end of the mounting fitting 2.

However, in such an attachment method, the spiral tube cord 3 protrudes perpendicularly outward from the side wall of the housing 4 and is bent at the portion where it is attached to the housing 4 due to its own weight or the like. In general, the spiral tube cord 2 has elasticity in the length direction, so it is strong against tensile force, but it is brittle against bending and shear forces, so the portion of the spiral tube cord 3 near the mounting bracket 4 is bent and easily damaged. Furthermore, if the spiral tube cord 3 is strongly and suddenly pulled in a direction along the side wall of the housing 4 or a blow is applied to a bent portion, there is a risk that the cord will break at this attachment portion due to shearing force. In addition, since the mounting bracket 2 is exposed to the outside of the housing 4, it is not desirable from the viewpoint of appearance, and the mounting operation is troublesome since it is attached both inside and outside the housing 4.

The object of the present invention is to provide a housing mounting device for a spiral tube cord that overcomes these drawbacks.

Embodiments of the present invention shown in the drawings will be described below.

In FIG. 2, reference numeral 10 represents a housing of a public telephone set, and a spiral tube cord 11 having one end connected to a handset (not shown) is inserted into the side wall of the housing 10. A circular hole 12 is provided for insertion. This hole 12 is the spiral tube cord 11
The outer diameter of the helical tube 13 is sufficiently larger than that of the helical tube 13 so that it can be inserted not perpendicularly to the side wall of the housing 10 but at a sufficient angle as shown in FIG. Note that the hole 12 may have an elliptical shape (see FIG. 4).

The insertion end of the spiral tube cord 11 inserted diagonally into the housing 10 from the hole 12 is attached along the inner wall of the housing 11 by three-point support.

That is, as shown in FIG. 2, a stop angle 20 is fixed to the inner side wall of the housing 10. As shown in FIG. 2, this stop angle 20 has a U-shaped cross section and is fixed by means such as welding at the tip ends 20b, 20b of a pair of opposing leg parts 20a, 20a. A pair of support holes 21, 21, which serve as support members and are large enough to allow the spiral tube cord 11 to be inserted therethrough, are bored in the leg portions 20a, 20a, facing each other. Furthermore, the center portion 20c of the stop angle 20
A screw hole 22 is provided in the screw hole 22, and a set screw 23 as an engaging member that can move back and forth in a direction parallel to the leg portion 20a (that is, in a direction perpendicular to the side wall of the housing 10) is screwed into the screw hole 22. There is.

To attach the spiral tube cord 11, set screw 2
3 is withdrawn to the side opposite to the leg portion 20a, and the spiral tube cord 11 is inserted from the tip end into both support holes 21,
21. Then, the set screw 23 is screwed in toward the leg portion 20a, so that the tip of the set screw 23 is engaged with the helical tube 11, and is pressed toward the side wall of the casing 10. As a result, the spiral tube cord 11 is pressed and supported to the right side (in FIG. 2) by the edges of the support holes 21, 21 on the side wall of the housing 10, and is also supported by the tip of the set screw 23 to the left side (in the left side). (in Figure 2). Therefore, it is fixed by three-point support in a slightly bent state as shown in FIG. 2 in the direction of the force applied at these three support parts. Therefore, even if the helical tube cord 11 is pulled from the outside of the casing 10 and a force is applied to the helical tube cord 11 in the longitudinal direction, and the helical tube cord 11 tries to shift from the stop angle 20 and the set screw 23, it will be stopped by the unevenness of the helical tube 11. Since it is attached, it is almost impossible for it to slip or fall out.

Further, a cylindrical guide body 24 for guiding the spiral tube cord 11 downward is provided outside the hole 12 provided in the side wall of the housing 10. Note that the reference numeral 14 in the figure indicates a handset cord housed within the spiral tube 13.

Figure 3 shows a spiral tube cord 1 instead of the set screw 23.
1 shows another embodiment of the present invention using a retaining ring 30 into which the retaining ring 1 is inserted and a thumbscrew 31 which moves the retaining ring forward and backward. That is, in this embodiment, the end of the spiral tube cord 11 is provided with a hole 12, a retaining ring 30,
If the retaining ring 30 is inserted into the hole 12 and moved toward the central portion 20c by operating the thumbscrew 31, the retaining ring 30 will touch the edges of the central portion 20c side of both support holes 21, 21 and the side wall of the housing 10. The helical tube cord 11 is attached by three-point support with the side edges.

In this device, the helical tube cord 11 is attached to the side wall of the casing 10 with three-point support, so that the attachment is secure and the attachment operation is simple. In addition, the exposed part of the helical tube cord 11 from the casing 10 is not perpendicular to the casing 10 as in the conventional example, but is in a state that is almost along the casing 10, so there is no large bending near the hole 12. Therefore, even if the helical tube cord is pulled strongly, the force is not applied much in the bending direction to the part of the helical tube cord 11 near the hole 12, but is applied in the length direction of the helical tube cord 11, so there is no risk of the helical tube cord 11 being damaged or broken by shear force.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional spiral tube cord attachment device, FIG. 2 is a diagram showing an attachment device according to an embodiment of the present invention, and FIG. 3 is a diagram showing a second embodiment. 10...Housing, 11...Spiral tube cord, 12...
... hole, 13 ... spiral tube, 14 ... handset cord,
20... Stop angle, 21... Support hole, 22...
...Threaded hole, 23... Set screw, 24... Cylindrical guide body, 30... Set ring, 31... Thumb screw.

Claims (1)

[Claims for Utility Model Registration] A housing for a spiral tube cord in which a spiral tube cord is inserted into a housing 10 and the end of the inserted spiral tube cord is attached in a state substantially parallel to the inner wall of the housing 10. The mounting device includes a hole 12 formed in the housing 10 in an elongated shape so that the spiral tube cord can be inserted in an oblique direction, and a screw hole 22 at both ends of the central portion 20c. Support holes 21, 2 for inserting
1, and the two legs 20a, 20a are located at a predetermined distance from the hole 12 such that the two leg portions 20a, 20a are oriented in a direction that substantially coincides with the longitudinal direction of the hole 12. The two legs 20a,
A stop angle 20 to which the tip ends 20b, 20b of the stop angle 20a are fixed, and the stop angle 20 is screwed into the threaded hole 22 in the center part 20c of the stop angle 20, and the tip part is screwed into the two support holes 21, a pressing member that presses an intermediate portion of the spiral tube cord inserted through the hole 12 in the direction of the housing 10 or the opposite direction; is inserted into the two support holes 21, 21 of the stop angle 20, and by pressing the middle part of the end of the helical tube cord with the tip of the pressing member by screwing the pressing member. , the ends of the helical tube cord are fixed by pressing two points in opposite directions from the intermediate portion of the helical tube cord at the edges of the support holes 21, 21 in a direction opposite to the tip of the pressing member. A housing attachment device for a spiral tube cord.