JPS5852773Y2 - telescope microphone - Google Patents

Description

[Detailed description of the invention] This invention relates to a telescope microphone configured such that a microphone head is attached to the tip of a telescoping support rod, and the base of the support rod is attached to a video camera, 8 mm camera, etc. This microphone was devised for the purpose of obtaining a microphone that can be manufactured easily and at low cost.

A conventional telescope microphone was constructed as shown in FIG. 4.

That is, a small metal tube 4 and a metal rod 5 are placed inside a support rod a in which a small metal tube 1 and a large metal tube 2 are slidably fitted in a sliding portion 3 and are electrically connected. The fitted part is inserted in the sliding part 6 so as to be slidable and electrically conductive, and the tip of the thin tube 4 is supported by the tip of the small tube 1 via the insulator 7, and the base of the metal rod 5 is inserted. The large pipe 2 through the insulator 8
It was configured to be supported at the base of the

A microphone head (not shown) is attached to the tip of the small tube 1, and the base of the large tube 20 is attached to an 8 mm camera or the like.

The support rod a made up of the small tube 1 and the large tube 2 telescopically supports the microphone head and forms one of the microphone output circuits, and the thin tube 4 and the metal rod 5 form the other one of the microphone output circuits. It is something.

The structure of such a conventional telescope microphone is
It is complicated, and it is difficult to create a structure that can be expanded and contracted in three or more stages, and it is also difficult to select materials and structures in order to make good electrical contact and prevent noise generation at the two sliding parts 3 and 6.

Furthermore, in order to create a stereo system, it is necessary to add more sets of thin tubes 4 and metal rods 5, which also increases the difficulty of machining.

The present invention provides a telescope microphone that can be manufactured easily and inexpensively by eliminating the drawbacks of the conventional structure.

The present invention will be explained below with reference to embodiments shown in FIGS. 1 to 3.

In this embodiment, a small tube 9 and a large tube 10 are slidably fitted to form a support rod, and an example is shown in which the small tube 9 and the large tube 10 are square tubes.

The small tube 9 is made of metal or synthetic resin, and the large tube 10 is made of synthetic resin, and both tubes are slidably fitted together.

A microphone head 11 is attached to the tip of the small tube 9, and the microphone output end is connected to a curled cord 12 which is spirally wound with two cores and can be freely retracted.
2 is taken out of the tube from the base of the large tube 100.

A long groove 13 is transparently provided on the upper surface of the large tube 10, and a small tube 9
The head of a machine screw 14 screwed into is engaged with the long groove 13.

As a result, the movement of the small tube 90 into and out of the large tube 10 is limited to the range in which the head of the machine screw 14 can move within the long groove 13.
It also prevents the entire small tube 9 from being accidentally pulled out from the large tube 10.

A stepped portion 15 is formed on both sides of the large tube 100, and a hole 16 is provided in the lower surface at this position as shown in FIG.

A synthetic resin spring body 17 is attached to this portion.

The spring body 11 has a cross-sectional shape similar to that of a U-shape turned sideways.
A projection 21 with a flat end surface is formed at the center of the bottom side 20.

This protrusion 21 fits into the hole 16 of the large tube and brings its flat end surface into contact with the flat bottom surface of the small tube 9. The spring body 1γ pushes the protrusion 21 inward into the hole 16 and pushes the end surface of the protrusion 21 into contact with the flat bottom surface of the small tube 9. Small tube 9
By making elastic contact with the small tube 9, it exerts an appropriate frictional effect on the sliding movement of the small tube 9.

At the base of the large tube 10, a seven-lunge-shaped fixing portion 22 is provided for attachment to an 8 mm camera or the like.

Since it is configured as described above, when the fixing part 22 is wrapped in a cushioning material and attached to an 8 mm camera, etc., as in the conventional case, the micro-microphone head 11 is held in a state protruding in front of the camera by the support rod. be done.

To adjust the amount of protrusion of the microphone head 11, by pushing the small tube 9 into or pulling it out from the large tube 10, the amount of protrusion can be adjusted within the range in which the machine screw 14 can move within the long groove 13.

During this adjustment, the protrusion 21 of the spring body 11 comes into elastic contact with the lower surface of the small tube 9 and exerts an appropriate frictional action, so that the sliding movement is neither too hard nor too loose.

Since the telescope microphone of the present invention is constructed as described above, (a) All or part of the support rod is made of synthetic resin molding, so the manufacturing cost is reduced to about half of the conventional one.

(b) The output of the microphone head 11 is taken out by the curl cord 12, and there is no sliding conductor part like the conventional small tube 1, large tube 2, thin tube 4, and metal rod 5, so noise is not generated. There is no need to worry about this, and there is no need to take this into account during manufacturing.

That is, the electrical contact portion can use a stable connection structure such as soldering or a crimp terminal.

(c) The conventional telescope mechanism has two concentric sets as shown in Fig. 4, and it is extremely difficult to insert two or more sets of telescopic conductors into the small tube 1 and the large tube 2. However, according to the structure of the present invention, it is easy to increase the number of conductors to three or more simply by increasing the number of cores of the curl cord 12, and it is also easy to create a stereo system using two microphone heads.

(a) In the illustrated embodiment, the small tube 9 and the large tube 10 are square tubes, but the present invention can be easily applied to circular tubes or other tubes with only slight deformation.

It has the following functions and effects, and is practically effective.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the present invention with the spring body removed, Fig. 2 is a bottom perspective view of the sliding part, and Fig. 3 is at the A-A position in Fig. 1. A cross-sectional view of the support rod in
FIG. 4 is a longitudinal sectional view showing a support rod a of a conventional telescope microphone. 9: Small tube, 10; Large tube, 11: Microphone head, 1
2: Curl cord, 13: Long groove, 14: Machine screw, 15:
Stepped part, 1γ: Spring body, 18: Upright side, 19: Key, 20
: bottom side, 21: protrusion, 22: fixed part, b: support rod.

Claims (1)

[Scope of utility model registration request] A small tube 9 having a microphone head 11 attached to its tip and a large tube 10 having a fixing part 22 at its base are slidably fitted,
The large pipe 10 is provided with a long groove 13 that engages the head of a small screw 14 screwed into the small pipe 9 to restrict the sliding range of both pipes 9 and 10, and a stepped portion formed on the side surface of the large pipe 10. 15 is attached with a spring body 17 which inserts a protrusion 21 formed in the center into the hole 16 of the large tube 10 and brings its end surface into elastic contact with the side surface of the small tube 9, and is connected to the terminal of the microphone head 11. A telescope microphone characterized in that a spiral multicore curl cord 12 is led out through a small tube 9 and a canine tube 10.