JP3038775U - Hanging microphone lifting device - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To facilitate installation of a hanging microphone in a hall or a studio, to facilitate maintenance of a joint portion of a movable microphone cable and a fixed microphone cable, and to smoothly raise and lower the movable microphone cable. . SOLUTION: A suspension microphone elevating device capable of self-propelled traveling is provided on a traveling rail arranged on a ceiling via a traveling timing belt, and a movable microphone cable is wound around the suspension microphone elevating device so that the movable microphone cable can be raised and lowered. A cable winding drum, a cable feeding mechanism that guides the movable microphone cable to the winding drum, a rotary connector that couples the movable microphone cable end to a fixed microphone cable end that is pulled out to the outside, and a motor of the cable winding drum. An overload prevention circuit for monitoring the current is provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a suspension microphone lifting / lowering device which is installed in a hall / studio or the like and used when collecting sound.

[0002]

[Prior art]

 FIG. 4 shows a conceptual diagram of a suspension microphone lifting device that is generally used in the past. A conventional hanging microphone lifting device 100 is fixedly installed on a grid on the ceiling, and a movable microphone cable 103 wound around a cable winding drum 102 rotated by a motor 101 has a microphone mounting bracket at its tip. 104 was attached and a coupling portion with the fixed microphone cable 105 was provided at the base end thereof, and the coupling portion was formed by the slip ring 107 and the brush 108 provided on the slip ring drum 106.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional hanging microphone device is large and heavy, and it is fixedly installed on the ceiling of a hall or studio. Therefore, it is not possible to move laterally when setting the microphone position in the optimum sound field. However, it is necessary to install a large number of hanging microphone lifting devices on the ceiling, which is very expensive, and a slip ring is used at the joint between the movable microphone cable that winds around the drum and the fixed microphone cable that is pulled out to the outside. The signal transmission due to the contact between the slip ring and the brush is susceptible to changes in contact resistance due to metal wear, metal fatigue, dust, etc., which causes a decrease in the audio signal level and noise generation to maintain performance. Very delicate regular maintenance is required, and the microphone mounting bracket at the end of the movable microphone cable comes into contact with the human body or art set and lifts. In the worst case, the motor may be burnt out.In addition, since the cable is wound around the drum as it is, the cable may sway during winding or become twisted due to the twisting of the cable. There was a risk such as.

The present invention has been made to solve the above problems, and facilitates installation of a hanging microphone lifting device in a studio and facilitates maintenance of a joint between a movable microphone cable and a fixed microphone cable. The purpose is to facilitate the vertical movement of the movable microphone cable.

[0005]

[Means for Solving the Problems]

 The configuration of the present invention to achieve the above object is to provide a suspension microphone elevating device capable of self-propelled traveling via a traveling timing belt on a traveling rail disposed on a ceiling, and the suspension microphone elevating device is provided with: A cable winding drum that winds a movable microphone cable so that it can be raised and lowered, a cable feeding mechanism that guides the movable microphone cable to the winding drum, and a rotary that connects the movable microphone cable end to a fixed microphone cable end that is pulled out to the outside. A connector and an overload prevention circuit for monitoring the motor current of the cable winding drum are provided.

[0006]

[Embodiment of the invention]

 An embodiment of the present invention will be described below with reference to FIG. 1. Reference numeral 1 represents a hanging microphone lifting device, and the lifting microphone lifting device 1 includes a pair of front and rear support plates 3 and 3 on a traveling rail 2 provided on a ceiling. A base 4 is movably supported through the base 4, and a part of the belt 5 is U-shaped so that the base 4 can travel by a traveling timing belt 5 provided along the rail 2. A pair of guide rolls 6 and 6 that are bent and inserted in a letter shape, a drive roll 7 that rotates by contacting the U-shaped curved portion of the belt 5 between the rolls 6 and 6, and drive the roll 7. And a traveling motor 8 that rotates, and the rotation of the motor 8 causes the base 4 to travel along the traveling rail 2.

Further, a cable winding drum 10 is installed on the base 4 via a drum supporting member 9, and a movable microphone cable 11 wound around the cable winding drum 10 is shown at the base end thereof in FIG. As described above, a mercury-containing contact (not shown), which is fixed to the rotary shaft 12 of the drum 10 and fixed to the rotating portion 13a having a protruding conductor (not shown) and the base 4, and into which the protruding conductor is inserted, is provided. It was electrically connected to the fixed microphone cable 14 via the rotary connector 13 including the fixed portion 13b. As shown in FIG. 2, the base 4 has a drum drive motor 15, and a drive pulley 16 attached to the rotation shaft of the motor 15 is provided between the drive pulley 17 attached to the rotation shaft 12 of the drum 10. A belt 18 is suspended, the drum 10 is rotated through the belt 18, and a second driven pulley 19 is attached to the rotary shaft 12 coaxially with the driven pulley 17, and the second driven pulley 19 is suspended. A feed shaft 20 which is rotated via a belt (not shown) is provided outside the drum 10 as shown in FIG. 3, and the feed shaft 20 and a cable guide 21 guided by the shaft 20 are fed. The movable microphone cable 11 was wound around the drum 10 via the mechanism 22. In the figure, 23 is an overload prevention circuit connected to the traveling motor 8 and the drive motor 15, and 24 is a microphone mounting bracket at the tip of the movable microphone cable 11.

Thus, the hanging microphone lifting device 1 can freely move on the running rail 2 by means of the running motor 8 and the timing belt 5 and extremely easily perform microphone setting in the optimum sound field. In addition, even when producing a program in the studio, the microphone mounting bracket can be lowered in the free space to avoid the art set, making it easier to work in the studio, and the movable microphone cable and the fixed microphone cable can be combined with a rotary connector. Since it is carried out via a cable, the characteristics of the joint part of the microphone cable are not deteriorated and maintenance is easy.Furthermore, since the movable microphone cable is sent by a cable feeder mechanism that moves along the drum, it is affected by shaking and twisting during winding. It can be wound along the groove of the drum to prevent irregular winding of the movable microphone cable. Also, excessive current applied to the drive motor is prevented by the overload prevention circuit.

[0009]

[Effect of the invention]

 Since the present invention is constructed as described above, the microphone can be moved freely into the free space of the hall or studio, and efficient setting work can be expected, and the movable microphone cable and the fixed microphone cable are joined by the rotary connector. Therefore, it is easy to maintain the joint, and the movable microphone cable is fed by the cable feeding mechanism to prevent irregular winding of the cable and smooth up and down movement of the microphone. Furthermore, an excessive load is applied to the microphone mounting bracket. When applied, the drive motor of the drum is automatically stopped by the overload prevention circuit, and the device failure can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view showing a part of the winding drum in a cutaway manner.

FIG. 3 is a side view of a winding drum.

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Hanging Microphone Lifting Device 2 Running Rail 4 Base 5 Running Timing Belt 10 Cable Winding Drum 11 Movable Microphone Cable 13 Rotary Connector 14 Fixed Microphone Cable 22 Cable Feed Mechanism 23 Overload Prevention Circuit

Front page continuation (72) Akira Yamazaki, Akira Yamazaki, 2-1-1, Jinnan, Shibuya-ku, Tokyo Broadcasting System Japan Broadcasting Center (72) Kanji Oshima, 2-2-1, Jinnan, Shibuya-ku, Tokyo Association Broadcast Center (72) Creator Toshio Mikami 4-14 Kamiyama-cho, Shibuya-ku, Tokyo N-C Kei-IT Co., Ltd. (72) Inventor Takeshi Oikawa 4-14 Kamiyama-cho, Shibuya-ku, Tokyo N-C-AI Tech Co., Ltd.

Claims (1)

[Utility model registration claims] 1. A suspension microphone elevating device capable of self-propelled traveling via a traveling timing belt is provided on a traveling rail disposed on a ceiling, and a movable microphone cable is wound up and down on the suspension microphone elevating device. A cable winding drum that rotates, a cable feeding mechanism that guides the movable microphone cable to the winding drum, a rotary connector that couples the movable microphone cable end to a fixed microphone cable end that is pulled out to the outside, and the cable winding drum. And an overload prevention circuit for monitoring the motor current of the suspension microphone raising / lowering traveling device.