JPS6020249Y2 - conductive telescopic strut - Google Patents

Description

[Detailed Description of the Invention] 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 expands and contracts in a height-adjustable manner.

Conventionally, this type of conductive telescoping pole uses a telescoping pole in which a small-diameter inner pole is nested into a large-diameter outside pole as a support pillar, and a telescoping curl in which a power supply cord is spirally wound inside this telescoping pole. There is one that allows you to insert a cord and extend and contract both the telescopic pole and the curl cord.

By the way, considering the ability to follow the expansion and contraction of the retractable pole as a curl cord, if you use a rigid material such as piano wire that has good followability especially when contracting, it will have a strong restoring force. A separate means is required to hold the cord when it is stretched, and the cord itself is too thick to be used with this type of thin pole.

Therefore, if a normal vinyl cord, in which the positive and negative core wires are insulated with vinyl, is used as a curl cord, it can be used even with thin and thin poles, and is advantageous in terms of price, but the followability and It lacks restorability and has large radial deflection, which may cause it to get caught between the outer pole and the opening end of the inner pole of the telescopic pole during expansion and contraction, causing the covering to tear and causing poor continuity.

In addition, since both ends of the curl cord are fixed to the ends of the outer and inner poles of the retractable pole, when these poles rotate relative to each other, the bar cord may twist and lose its resilience, especially in the case of vinyl cords. Tangled and relaxing.

In view of these circumstances, this invention prevents the cord from twisting or tangling by preventing the telescopic pole from rotating, and covers the area between the outer pole and the opening end of the inner pole with a protective pipe to prevent the cord from getting caught. To provide a conductive telescoping column that allows a vinyl cord to be used as a curl cord without any problems.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, reference numeral 1 denotes a telescoping pole as a telescoping support column, and a small-diameter inner pole is placed above the inside of the large-diameter outer pole 1a. The poles 1b are fitted in a telescoping manner so that they can be expanded and contracted, and these poles 1a and 1b have a heavy object such as a microphone attached to their upper ends, and are made of strong metal because they are repeatedly expanded and contracted.

At the upper end of the outer pole 1a, there is a folded part 2 that prevents the inner pole 1b from being pulled out, and at the lower end, a ring-shaped inner protrusion 4 prevents the inner pole 1b from being pulled out and is press-fitted with a cap fitting 3. Also at the upper end, a ring-shaped inner protrusion 5 prevents removal and a tip fitting 6 is press-fitted.

Further, a sliding spring 7 is fixed to the outer side of the lower end of the opening side of the inner pole 1b by engaging the inside of the engagement protrusion with the hole 17 on the inner pole side. l
The telescopic pole 1 is fixedly held in an arbitrary telescopic state by being elastically supported by interposing it in the gap between a and lb.

By the way, the sliding spring 7 is divided into two parts in the circumferential direction as shown in FIG. It is assembled so as to sandwich the ribs 8 of the book from both ends, and these ribs 8 and the sliding spring 7 prevent the telescoping pole 1 from rotating.

Further, a protective pipe 9 and a curl cord 10 are provided inside the outer and inner poles 1a and 1b, and the lower end of the protective pipe 9 is connected to the hole 18 of the end piece 3 with a ring-shaped outer protrusion 19. It is installed by press-fitting without pulling out, and has a length that is almost inscribed in the inner pole 1b and extends to the vicinity of the folded part 2 of the outer pole 1a, and even when the pole is fully extended, the lower end of the inner pole 1b It is designed so that it can be covered.

The curl cord 10 has a core wire 1ea on the positive and negative sides,
A vinyl cord 10b coated with a vinyl insulation coating 10c is spirally wound to make it stretchable, and both ends of the curled cord 10 are connected to metal fittings 3 at the ends of the outer and inner poles la and lb by means 11, respectively. , 6 and coupled for electrical connection to the outside.

That is, to explain the means 11 on the side of the end fitting 6 of the inner pole 1b, a hole 12 penetrating through the center of the fitting 6 is bored, and a negative side terminal 13b of the plug 13 is provided.
are formed to protrude, and the positive terminal 13a of the plug 13 is fixed by caulking through a flanged insulating bushing 14 inside these holes 12 and terminals 13b.

Further, when fixing the terminal 13a, the rough terminal 15b on the negative side that is in contact with the metal fitting 6 inside the metal fitting 6 is attached to the terminal 13a.
Rough terminals 15a on the positive side are respectively attached in contact with the rough terminals 15a, and only the core wire lea on the positive side of the curl cord 10 and the sheath 10c are crimped and connected in two stages to the rough terminals 15a so as to sufficiently withstand the tensile force of expansion and contraction. The rough terminal 15b on the negative side is also crimped and connected in the same manner.

Incidentally, the outer pole 1a is connected in the same manner on the end fitting 3 side, and the positive and negative terminals 13a and 13b of the plug 13 are provided directly on the respective metal fittings 3 and 6 to protrude. Electrical connections to the outside can be easily made with one-touch jack method.

Since the present invention has such a structure, when the inner pole 1b is expanded or contracted, the sliding spring 7 integrated therewith is guided in the axial direction by the rib 8 of the fixed outer pole 1a.
The inner pole 1b moves up and down linearly with respect to the outer pole 1a without rotating, and is fixedly held in an arbitrary expansion/contraction state by the sliding spring 7.

Therefore, the microphone, etc. attached to the upper end of the inner pole 1b may operate improperly, and the curled cord 10 for power supply may
This prevents it from twisting or turning around.

On the other hand, at this time, when the inner pole 1b is extended, the curl cord 10 is extended together with the tensile force applied thereto, and when it is contracted, the tensile force is reduced and the curl cord 10 is automatically folded and contracted by the restoring force of the cord itself.

By the way, the curl cord 10 is suspended and supported vertically,
Because it is soft and lacks resilience, the lower part in particular is unstable and swings relatively widely in the radial direction when expanding and contracting.
A protection pipe 9 is always located between the lower part of the curl cord 10 and the lower end of the opening side of the inner pole 1b to restrict the lower part of the curl cord 10 from moving toward the lower end of the inner pole 1b.

Therefore, the lower part of the curl cord 10 is prevented from swinging only inside the protection pipe 9, moving to the lower end of the inner pole 1b, and being caught there.

As described above, according to the present invention, the outer and inner poles 1a and 1b of the telescopic pole 1 are prevented from rotating, and the lower part of the curl cord 10 is prevented from moving toward the lower end of the opening side of the inner pipe 1b by the protective pipe 9. Since the cord itself is protected from being twisted or caught, it can supply power for a long period of time without any problems even if a vinyl cord that is soft and lacks followability and recovery properties is used for the curl cord 10. 1 itself can also smoothly expand and contract.

Also, both ends of the curl cord 10 are connected to outer and inner poles l.
Since it is designed to be connected and coupled to a plug 13 provided at the a and lb ends, external connections can be easily made using this plug 13.

Although a two-stage pole is illustrated, it is of course possible to use a higher number of stages.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the conductive telescoping column according to the present invention, and FIG. 2 is a cross-sectional view taken along the line -■ in FIG. 1...Telescopic pole, 1a...Outer pole, 1b...Inner pole, 7...Sliding spring, 8...Rib, 9...Protection pipe, 10...Curl cord, 13...Plug.

Claims (1)

[Scope of utility model registration request] An extensible power supply curl cord wound spirally is inserted into the extensible pole, both ends of the curl cord are fixed and electrically connected to the connecting fittings attached to both ends of the extensible pole, and the outer side of the extensible pole is At least one rib is provided protruding in the axial direction of the inside of the pole, a sliding spring is attached to one end of the inside pole of the telescoping pole, and the sliding spring is inserted between the outside and inside poles so as to sandwich the rib from both sides. A conductive telescoping pole is provided to fix and hold the telescoping pole in any telescoping state and prevent it from rotating, and a protective pipe is provided close to the inside of the inner pole so as to always cover one end of the telescoping pole. .