JPS6037771Y2 - conductive telescopic strut - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a conductive telescoping pole that is used as a support for a tabletop microphone, a desk lamp, etc., has a built-in power supply cord, and is adjustable in height.

[Conventional technology]

As this type of conductive telescoping pole, there is one in which a cord such as a flexible vinyl cord is simply inserted into the telescoping multi-stage pole of the support pillar, and when the pole is extended or contracted, the cord is stretched or slackened as appropriate.

[Problem that the invention attempts to solve]

According to this, the slack cord tends to get caught between the outer pole and the base end of the inner pole, especially when it is contracted, and this causes problems such as the inability to expand and contract, and the soft vinyl cord coating being torn, resulting in an inability to conduct. there were.

[Means to solve the problem]

In view of these circumstances, the present invention utilizes a thin steel plate that has the characteristic of bending and deforming from a straightly stretched state into a beveled shape by applying force to both ends. It is installed in the longitudinal direction inside the pole, a hole is made in the thin steel plate, the cord is passed through it and it is attached integrally, and when the pole expands and contracts, the cord is folded so that it does not stretch or slack due to the deformation of the thin steel plate. To provide a conductive telescoping column that prevents a cord from getting caught in a pole.

【Example】

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, reference numeral 1 denotes, for example, a two-stage telescoping pole as a telescoping support column. The small-diameter inner pole 1b is configured to be expandable and retractable by fitting into the inserted dog. These poles la and lb are formed with a polygonal cross section and are prevented from rotating, and are made to have strong strength because they are repeatedly expanded and contracted, and a heavy object such as a microphone is attached to the upper end of the inner pole 1b. It is made of metal. The upper end of the outer pole 1a is connected to the inner pole 1b by the aperture 3.
A hollow proximal metal fitting 4 is fixed to the proximal end by caulking, and a screw 5 is formed directly on this metal fitting 4 to be screwed onto a pedestal or the like. A sliding spring 6 is attached to the outside of the base end of the inner pole 1b, and by sandwiching the sliding spring 6 between the inner pole 1b and the outer pole 1a, the inner pole 1b smoothly slides during expansion and contraction, and can be in any expansion or contraction state. A hollow end fitting 7 is simultaneously fixed to the tip by caulking, and a screw 8 for directly screwing a microphone or the like is formed on this fitting 7. These metal fittings 4, 7 are provided with a fixed member 9, which is made of stepped hard resin or the like and has a larger diameter on the inside than on the outside.
10 are respectively fitted and closed, and in this case, the step portions 4a, ? of the metal fittings 4, 7 on opposite sides of each other The thin steel plate 11 is attached to the poles la and lb with both ends hooked on the poles a and lb.
The tension of the thin steel plate 11 is reliably applied to the poles la and lb via the metal fittings 4 and 7. The thin steel plate 11 is made of ribbon steel used for convexes, for example, and is formed into a flat plate or curved band shape in cross section, and has the flexibility to easily bend and deform the middle into a L-shape when force is applied to both ends. . As shown in Fig. 1, such a thin steel plate 11 is installed so that there is a slight slope in the middle even when the pole is fully extended, so that the tension of the thin steel plate 11 is always applied to the pole side. , at the same time, when reducing, the inclined part 11a is always
It is bent into two at certain positions of bent portions 11b and 11c at both ends. Therefore, in order to follow the deformation of the thin steel plate 11, a two-core power supply cord 12 is attached along the thin steel plate 11 by bonding with an adhesive or the like, and both ends of the cord 12 are connected to metal fittings 4 and 7, respectively.
It is led out through the process. Code 12 is a core wire with painted lines covered with vinyl etc. glued and arranged in parallel.There are two types of core wires: stranded wires and solid wires, but in the case of solid wires, it is better to use a meandering core instead of a straight core. It is preferable because it has flexibility. By the way, if the cord 12 is attached only to one side of the thin steel plate 11, the lengths of both will change when the thin steel plate 11 is bent and deformed, causing tension in the cord 12. To prevent such a problem, the length of the thin steel plate 11 is A hole 13 is drilled in the middle, and through this hole 13, the cord 12 is attached in half on both sides of the thin steel plate 11, so that the cord 12 is always on the inside of the thin steel plate 11 when the thin steel plate 11 is bent. . Since the present invention has such a configuration, when the inner pole 1b is extended as shown in FIG. The inner pole 1b can be freely extended. Next, when the inner pole 1b is reduced as shown in FIG.
The thin steel plate 11 has two predetermined bent portions 1 due to its flexibility.
1b and 11c are bent in opposite directions and deformed into an L-shape, so that the cord 12 which is integral with the thin steel plate 11 is also meandered together and folded without sagging. At this time, the expanding inner pole 1b of the thin steel plate 11
etc., an action is generated in the thin steel plate 11 itself to maintain this state, which destroys the restoring force of the thin steel plate 11, and it is maintained in the bow-shaped deformed state as described above. It is. Note that the tension of the thin steel plate 11 is always acting on the pole side,
During the extension of the pole, the tension acts in the direction of extension of the pole, making the extension operation particularly easy.
This is very advantageous considering that a heavy object such as a microphone is attached to the upper end of the inner pole 1b. Further, in the embodiment, the outer and inner poles 1a and 1b are formed to have a polygonal cross section so as to be able to prevent rotation, but the thin steel plate 11
Since the shaft itself has a relatively high resilience against twisting, rotation can be prevented using this characteristic. Furthermore, it goes without saying that the present invention is not limited to two-stage poles.

[Effect of the idea]

As described above, according to the present invention, by utilizing the characteristics of the thin steel plate 11, the cord 12 can be stretched without sagging when expanded or contracted to the pole.
Moreover, since it is folded and stored, various problems caused by the cord 12 getting caught in the pole side are eliminated. Furthermore, the presence of the thin steel plate 11 increases the strength of the pole, and its tension improves operability during expansion and contraction. Furthermore, since the cord 12 is always located inside the thin steel plate 11 during deformation and no tensile force is applied to it, breakage, damage, etc. will not occur.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the conductive telescoping column according to the present invention, FIG. 2 is a cross-sectional view showing the same in a reduced state, and FIG. 3 is a side view showing the relationship between the thin steel plate and the cord. 1...2-tier telescopic pole, 1a...outer pole, 1b...inner pole, 3...
・Aperture, 4... Base end fitting, 5, 8...
Screw, 6...Sliding spring, 7...Tip fitting, 9, 10...Fixing member, 11...
Thin steel plate, 11a... Inclined portion, 11b. 11c...bent portion, 12...cord, 13...hole.

Claims (1)

[Scope of utility model registration request] A thin steel plate is installed between the outer pole base end metal fitting and the inner pole tip metal fitting in the telescopic multi-stage pole so that the middle part is slightly inclined even when the pole is fully extended, and a hole is installed near the middle of the thin steel plate. A cord is attached to both sides of the thin steel plate through this hole, so that the cord is always on the inside of the thin steel plate when the thin steel plate is bent, and both ends of the cord are connected to the base end fitting and the tip. A conductive telescoping column which is led out of a metal fitting, and when the pole is expanded or contracted, the thin steel plate is made into a substantially straight line to extend the cord, or bent and deformed into a cross-shaped shape to fold the cord.