JPS5932796Y2 - conductive telescopic strut - Google Patents

Description

[Detailed Description of the Invention] The present invention is used in tabletop microphones, desk lamps, etc., and is expandable and retractable to adjust the height and maintain that state, and is capable of supplying power from one end to the other. This relates to conductive telescoping struts that can be used.

Conventionally, various forms of this kind of thing are known,
Among them, a telescopic pole that fits a large diameter pipe and a small diameter pipe into a nesting hole is used as a support pillar, and a curl cord in which a power supply cord is spirally wound to make it extendable in the longitudinal direction is placed in this internal space. Some devices are configured so that a curled cord for power supply can respond to the telescoping action of the telescoping pole.

By the way, a telescopic pole has a heavy microphone, etc. fixed to its upper end as a support pillar, and is generally made of metal because it needs to maintain an appropriately expanded state and have the strength to enable repeated use of telescopic movements. In contrast, the curl cord inserted into the telescoping pole consists of ordinary vinyl cord.

Therefore, this vinyl curl cord has low elasticity, or restoring force, and is prone to buckling during long-term use.
When sliding, the telescopic pole may get caught in the lower end of the small-diameter tube and the leaf spring, causing the cord sheathing to tear, resulting in poor continuity.Also, the cord may stretch completely and lose its restoring force, causing problems in the telescopic pole's expansion and contraction. there were.

In this case, it may be possible to use a cord with strong resilience, such as one made of steel material such as piano wire, which is lined along the cord, but the overall diameter of the cord would become thicker, and the thin elastic cord for tabletop use, which is the subject of this case, would be used. It is difficult to fit into the small gap between the poles.

Furthermore, even if it were to enter the pole, the cord would not be able to move smoothly in the axial direction due to the large friction with the inner surface of the pole, and would not be able to keep the telescopic pole extended due to the large restoring force of the cord. The stop structure must be considered separately.

Furthermore, when a curl cord is used, the cord end is held by the fitting on the side of the telescopic pole small diameter pipe and large diameter pipe, so if those small diameter pipes and large diameter pipes were rotatable, these The cord gets twisted and tangled due to the rotation of the telescopic pole, and loses its restoring force.

The present invention was developed in view of the above circumstances.The core pole is arranged to be extendable and retractable at the core of the curl cord inserted into the telescopic pole. In addition, the core pole is positioned eccentrically relative to the telescopic pole to prevent rotation of the telescopic pole, and the curl cord is prevented from expanding and contracting over a long period of time when the telescopic pole is repeatedly extended and contracted. It provides conductive telescoping struts that ensure smooth operation.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, reference numeral 1 is a telescopic pole, and this telescopic pole 1 serves as a telescopic support column, that is, a microphone is placed at the upper end on the small diameter pipe side. It is preferable to use metal because it is required to hold a heavy object such as a metal object in an extended state, to have the strength to allow repeated expansion and contraction operations, and to perform smooth and reliable expansion and contraction operations. The small diameter pipe 1b is fitted into the nesting hole.

At the upper end of the large diameter pipe 1a, there is a folded part 2 which is folded inward, and at the lower end of the small diameter pipe 1b, a plate spring 3 with good sliding properties is used to push the protruding part 3a toward the small diameter pipe 1b. The plate spring 3, which is fixed by hooking or the like, slides into contact with the large diameter pipe 1a to smoothly expand and contract the small diameter pipe 1b with respect to the large diameter pipe 1a, and the plate spring 3 is locked to the folded portion 2 to prevent it from being pulled out. That's what I do.

Furthermore, a base-side fixture 4 is attached to the lower end of the large-diameter pipe 1a, and a fixture 5 for attaching a microphone or the like is similarly attached to the upper end of the small-diameter pipe 1b. A curl cord 6 is inserted inside 1a and 1b, and a core pole 7 is arranged at the core of the curl cord.

The curl cord 6 is an ordinary vinyl cord consisting of conductive core wires 6a6b having the required number of circuits, an inner layer of cedar covering 6c that insulates the periphery of each conductor, and an outer layer 6d that covers the whole, and is wound spirally. It is designed to expand and contract while moving in the axial direction.

That is, each curled portion is in a nearly dense layered state in a non-tensioned state, expands and opens when tension is applied, and returns to its original state due to elasticity when the string force is further released.

Therefore, when the telescopic pole 1 is in a non-tensioned state when the telescopic pole 1 is contracted, the curl cord 6 is inserted into both the telescopic pole 1 and the core pole 7 with a gap, and when the telescopic pole 1 is extended and tension is applied, the curl By making the diameter of the cord 6 slightly smaller, the gap is set so that it is almost in contact with the core pole 7, and the curl cord 6 can freely move in the axial direction and expand and contract in response to the presence or absence of tension. .

Then, the outer layer cover 6 at both ends of the curl cord 6 is
d is peeled off and the inner layer coating 6 of the conductive core wires 6a, 6b is exposed.
c is tightly fitted into the insulating resin member 8 of the fixtures 4 and 5, fixing and holding both ends of the curl cord 6, and guiding the conductive core wires 6a t 6b to the outside.

Like the telescopic pole 1, the core pole 7 is made up of a large diameter pipe 7a and a small diameter pipe 7b that are telescopically fitted into a large diameter pipe 7a using a leaf spring or the like, and these small diameter pipes 7a and 7b are arranged inside the curl cord rod. be done.

By the way, such a core pole 7 serves as a guide for the curl cord 6 and does not require strength, so resin may be used. Furthermore, the small diameter pipe 7b is not designed to have any other parts inside it, so it may be made of solid material. It may be.

Then, the head of the bolt 9 is attached to the lower end of the large diameter pipe 7a, and the threaded portion of the bolt 9 is passed through the hole 10 in the fixture 4 at a position offset by an amount Similarly, the upper end of the small diameter pipe 7b is eccentrically and integrally fastened to the small diameter pipe side fixture 5 of the telescopic pole 1.

Thus, since the present invention is constructed as described above, when the small diameter pipe 1b is extended and contracted with respect to the large diameter pipe 1aFC of the telescopic pole 10, it is integrated with the sides of those pipes 1a and 1b by the fittings 4 and 5. In the core pole 7, the small diameter part 7b expands and contracts together with the large diameter part 7a, so that the core pole 7 is always located in the entire area of the core of the curl cord 6.

Also, at this time, both ends of the curl cord 6 are fixed to the pipes 1a and 1b side of the telescopic pole 1 by the fittings 4°5, so that when the small diameter pipe 1b is extended, tension is applied to the curl cord 6, causing it to pivot. Stretch while moving in one direction, small diameter pipe 1
When b contracts, the tension in the curl cord 6 disappears, and the cord 6 automatically moves in the other direction in the axial direction due to the restoring force and is folded and contracted.

In this case, the core pole 7 is always positioned in the entire area of the core of the curl cord 6 and guides the curl cord 6 to regulate its moving direction, so the curl cord 6 is always straight in the axial direction without meandering. It moves and expands and contracts.

Further, during such expansion and contraction, the core pole 7 is eccentric with respect to the expansion and contraction pole 1 to prevent rotation of the expansion and contraction pole 10, so that the curl cord 6 only expands and contracts without rotating together with each pole 1 and 7. There is no twisting or tangling, and it maintains a specified restoring force over a long period of time.

According to the present invention, the core pole 7 is provided at the core of the curl cord 6 inserted into the telescopic pole 1 to guide the movement of the curl cord 6, and the core pole 7 is used to guide the movement of the telescopic pole 1. Since the curl cord 6 is prevented from rotating, the curl cord 6 can extend and contract smoothly and reliably over a long period of time, and can supply power.

Further, the structure is simple, and the core pole 7 having the same structure as the telescopic pole 1 does not interfere with the operation of the telescopic pole 1.

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment of a conductive telescopic column according to the present invention. 1... Telescopic pole 4, 5... Mounting tool, 6... Curl cord, 7... Core hole.

Claims (1)

[Scope of utility model registration request] A spirally wound, extensible power supply curl cord is inserted into the telescoping pole, and both ends of the curl cord are fixed to the upper and lower ends of the telescoping pole. In the conductive telescoping column that extends and contracts, a core pole is disposed at the core of the curl cord so as to expand and contract together with the telescoping pole, and guides the axial movement of the curl cord during expansion and contraction, and the core pole is connected to the telescoping pole. A conductive telescoping pole characterized in that the telescoping pole is positioned eccentrically to prevent rotation of the telescoping pole.