KR102243190B1 - Receiver for wireless microphone - Google Patents

Abstract

Disclosed is a receiver for a wireless microphone, which is configured such that a plug is rotatably installed with respect to a receiver housing so that an angle can be freely changed, and thus the wireless microphone is configured to easily insert/separate the plug of the receiver into/from a sound device, and is configured to receive a voice signal generated from a plurality of wireless microphones through one receiver and output the voice signal.

Description

Receiver for wireless microphone {RECEIVER FOR WIRELESS MICROPHONE}

The present invention relates to a receiver for a wireless microphone, and the plug is rotatably installed with respect to the receiver housing and is configured to freely change the angle, so that the plug of the receiver can be easily inserted into or removed from an audio device, and a plurality of The present invention relates to a receiver for a wireless microphone configured to receive voice signals generated from wireless microphones by a single receiver and output the same.

The wireless microphone system is a system composed of a wireless microphone and a wireless receiver that wirelessly receives voice from the wireless microphone.

Wireless microphones are used for various purposes, such as portable wireless microphones used in performances or event venues, to store audio signals in combination with camcorders at a shooting site, or to stage, lecture, and presentation halls.

Depending on the method of wireless communication, the recent wireless microphone system mainly consists of a digital method using a 24 GHz band and an analog method using a 200 MHz, 700 MHz, 900 MHz band.

An example of such a transmission/reception device for a wireless microphone is disclosed in Utility Model Registration No. 401352.

As shown in Fig. 1, the conventional wireless microphone transmission/reception device forms a rod-shaped plug 21 in which a wireless receiver 20 is integrally formed on one side, and is inserted into an input port (input socket) of an audio device to provide an audio signal. In addition, wireless signals are being transmitted to audio equipment.

However, the conventional technology has a problem in that it is difficult to insert the plug 21 into the input port of the sound device when the sound device is located in a location that is difficult to access due to a narrow space in front of the sound device. That is, since the wireless receiver and the plug are integrally horizontally connected, the installation direction of the wireless receiver is limited according to the arrangement of the input ports of the audio device. Therefore, there is a problem in that there is a limitation in freely arranging the audio device and the wireless receiver as desired by the user.

In addition, a wireless receiver that receives a signal from a wireless microphone usually filters a frequency band of a wireless RF signal received through an antenna, amplifies the filtered RF signal, mixes the RF signal and the oscillation frequency, and mixes the mixed intermediate frequency. The process of filtering and amplifying is repeated, and the received RF signal is output as a voice signal through a process such as removing distortion or noise of the signal and sending it to the audio output side.

However, when such wireless receivers are used in equipment using a plurality of wireless microphones, it is common to use individual wireless receivers with as many as the number of wireless microphones. This is acting as a cause of an increase in cost and an increase in volume.

Accordingly, in the case of using a plurality of wireless microphones, there is a need for a wireless receiver for comprehensively managing by simultaneously or sequentially receiving signals received from the plurality of wireless microphones.

The present invention was conceived to solve the above problem, and an object of the present invention is to insert or remove the plug of the receiver into the sound device by being configured to be able to freely change the angle by installing the plug rotatably with respect to the receiver housing. It is to provide a receiver for a wireless microphone that is easily configured.

In addition, an object of the present invention is a receiver for a wireless microphone configured to be able to use a plurality of wireless microphones through a single receiver by receiving the voice signal generated from a plurality of wireless microphones by a single receiver and outputting the same. It is about.

The above-described object is a receiver housing in which a circuit board is installed inside and a battery mounting groove in which a battery electrically connected to the circuit board is mounted is formed on a bottom surface, and an input of an audio device is provided on a bottom surface of one end of the receiver housing. A plug inserted into and coupled to the port and electrically connected to the circuit board; a receiving antenna electrically connected to the circuit board and discharged from the circuit board to the other side of the receiver housing to wirelessly receive a signal from a microphone; and the receiver An angle adjusting means installed on the bottom of one end of the housing and coupled to the other end of the plug, so that the plug can be angled downward and fixed at a position at which the angle is adjusted with respect to the receiver housing, and an end portion of the receiver housing. One end is hinged so as to be rotatably coupled to the receiver housing to selectively open and close the battery mounting groove, wherein the plug is discharged at one end, and a cover is formed with a guide hole for guiding the rotation of the plug. This can be achieved by a receiver for a wireless microphone.

Here, the angle adjusting means is formed in a cylindrical shape, angle adjusting grooves are formed at equal intervals along the circumferential direction on both sides, and a rotating body in which a wire entry hole is formed at the other end, and protruding from one end of the rotating body to one side. A rotating member comprising a cylindrical coupling portion having a hollow inside and fixed by inserting the other end of the plug into one end and communicating the other end with the wire entry hole; A support member comprising a pair of supports protruding downward from the bottom of one end of the receiver housing, and having a rotational support groove formed at a lower end of the upper end of the rotating body to be rotatably received and supported; Consisting of being in close contact with and supporting the side of the rotating body and the side of the support, a fixing part protruding laterally at the top and fixed to the bottom of the receiver housing through a screw is formed, and the angle at equal intervals along the circumferential direction on the inner surface of the lower part A pair of support plates on which an angle adjustment protrusion is selectively inserted into the adjustment groove is formed, and a support cover part protruding inward from the lower end of the support plate and provided in a concave semi-arc shape to be rotatably accommodated and supported by the lower end of the rotating body, and the It is configured to connect the rear ends of the pair of support plates, it is preferable to be configured to include a support cover member consisting of a connecting plate in which the wire entry groove into which the wire is inserted is formed at the center upper part.

In addition, an upper stopper support protrusion for supporting the upper surface of the cylindrical coupling part is protruded on the bottom surface of one end of the receiver housing when the receiver housing and the plug are horizontally angled between one end of the pair of supports, and the cover A lower stopper support jaw is formed at the other end of the guide hole to support the bottom of the cylindrical coupling part when the plug is vertically angled from the receiver housing, and between the other ends of the pair of supports on the bottom of one end of the receiver housing. It is preferable that a guide plate for guiding the electric wire introduced into the cylindrical coupling part is formed, and a through hole through which the electric wire connected to the circuit board passes through the upper side of the guide plate is formed in the lower surface of the receiver housing.

In addition, the circuit board has four receiving channels, an RF receiving module for receiving and outputting a voice signal wirelessly transmitted from four wireless microphones through the receiving antenna, and at least one output from the RF receiving module. An audio signal processing unit that converts and outputs an audio signal into a signal suitable for output to a speaker, and controls the operation of the RF receiving module and the audio signal processing unit, and stores an identification code for identifying the four wireless microphones. A main CPU for identifying the voice signals output from the four wireless microphones is installed, the voice signal processing unit low-noise amplifier for low-noise amplification of high-frequency signals transmitted and received from the RF receiving module, and amplified by the low-noise amplifier. An audio processing unit for separating an audio signal from a high-frequency signal, a codec for demodulating an audio signal output from the audio processing unit into an audio signal, a mixer for mixing the audio signals for each of the plurality of transmitters output from the codec, and in the mixer It comprises a filter for removing noise from the output voice signal, and an amplifier for amplifying and outputting the voice signal output from the filter, and is connected to the main CPU on the upper surface of the receiver housing to display the status of each microphone channel and It is preferable that a display unit that displays the remaining amount of power is provided.

In addition, when molding the receiver housing and cover, based on 100 parts by weight of ABS resin, 15 parts by weight of amine polyglycol condensate, 2.5 parts by weight of titanium dioxide powder, 5 parts by weight of Vinyl Oximeino Silane, It is preferable to form by mixing 2.5 parts by weight of zeolite fine powder, 4 parts by weight of benzoguanamine, and 10 parts by weight of allantoin.

In the receiver for a wireless microphone according to the present invention, since the plug is rotatably installed with respect to the receiver housing through an angle adjusting means so that the angle can be freely changed, the plug of the receiver can be easily inserted into or removed from the audio device. There is.

In addition, since the receiver for a wireless microphone according to the present invention is configured to receive and output voice signals generated from a plurality of wireless microphones by a single receiver, it is possible to use a plurality of wireless microphones through one receiver. It works.

1 is a diagram showing an example of a conventional wireless receiver;
2 is a perspective view showing a receiver for a wireless microphone according to the present invention,
3 is a bottom perspective view showing a state in which the cover is opened in the receiver for a wireless microphone according to the present invention;
4 is a plan view showing a receiver for a wireless microphone according to the present invention;
5 is a side view showing a receiver for a wireless microphone according to the present invention;
6 and 7 are views for explaining the structure of the angle adjusting means in the receiver for a wireless microphone according to the present invention,
8 to 10 are views for explaining the operation of the angle adjustment means in the receiver for a wireless microphone according to the present invention,
11 to 13 are configuration diagrams or circuit diagrams for explaining an RF receiving module, a voice signal processing unit, and a main CPU installed on a circuit board in the present invention;
14 is a view for explaining the operation of the display in the present invention.

Hereinafter, a receiver for a wireless microphone according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing a receiver for a wireless microphone according to the present invention, Figure 3 is a bottom perspective view showing a state in which the cover is opened in the receiver for the wireless microphone according to the present invention, Figure 4 is for the wireless microphone according to the present invention A plan view showing a receiver, and FIG. 5 is a side view showing a receiver for a wireless microphone according to the present invention.

Referring to the accompanying drawings, the receiver for a wireless microphone according to the present invention is configured so that the plug is rotatably installed with respect to the receiver housing so that the angle can be freely changed, so that the plug of the receiver can be easily inserted into or removed from the audio device. As characterized in that, it is configured to include a receiver housing 100, a plug 200, a receiving antenna 300, an angle adjusting means 400, and a cover 500.

The receiver housing 100 has a circuit board 110 installed therein, and a battery mounting groove 120 in which a battery B electrically connected to the circuit board 110 is mounted on a bottom surface thereof.

Here, a fixing protrusion 130 is formed on the side end of the receiver housing 100 to catch and fix the inner surface of the cover when the cover 500 to be described later is closed, and the battery mounting groove 120 is formed at both ends of the inner surface. It is preferable that a negative electrode tab and a positive electrode tab 121 electrically connecting B) to the circuit board 110 are provided.

Further, on the side of the receiver housing 100, an ON/OFF switch 140 for turning on and off the battery power is installed, and a charging terminal unit 150 for charging the battery B It is preferable that is formed.

The receiving antenna 300 is electrically connected to the circuit board 110 and discharged from the circuit board 110 to the other side of the receiver housing 100 to receive a signal from the microphone wirelessly.

The angle adjusting means 400 is installed on the bottom of one end of the receiver housing 100 and the other end of the plug 200 is coupled, so that the plug 200 is angled downward with respect to the receiver housing 100 And it is configured to enable fixation in the angle-adjusted position. The angle adjustment means 400 will be described later in more detail.

The cover 500 is configured to be hinged (H) to be rotatably coupled to an end portion of the receiver housing 100 to selectively open and close the battery mounting groove 120 of the receiver housing 100, one end The plug 200 is discharged and a guide hole 510 for guiding the rotation of the plug 200 is formed.

According to the present invention, it is characterized in that the plug 200 is installed so that the angle can be adjusted in the vertical direction with respect to the receiver housing 100 through the angle adjusting means 400, more specifically, 6 and 7, the angle adjusting means 400 is configured to include a rotating member 410, a support member 420, and a support cover member 430.

First, the rotating member 410 is formed in a cylindrical shape, angle adjustment grooves 411a are formed at equal intervals along the circumferential direction on both sides, and a rotating body 411 in which a wire entry hole 411b is formed at the other end, and the It is formed to protrude from one end of the rotating body 411 to one side, and the inside is formed in a hollow so that the other end of the plug 200 is inserted and fixed at one end, and the other end is configured to communicate with the wire entry hole 411b. It is composed of a cylindrical coupling portion 412.

In addition, the support member 420 is formed protruding downward from the bottom of one end of the receiver housing 100, and a rotational support groove 421a is formed at the lower end of which the upper end of the rotating body 411 is rotatably accommodated and supported. It consists of a pair of supports (421).

And the support cover member 430 is configured to be in close contact with and support the side of the rotating body 411 and the side of the support 421, but protrudes laterally to the upper end of the receiver housing 100 through a screw (S). A pair of support plates 431 in which a fixing part 431a fixed to the bottom is formed, and an angle adjusting protrusion 431b selectively inserted into the angle adjusting groove 411a at equal intervals along the circumferential direction on the inner surface of the lower end is formed And, the support cover part 432 which protrudes inward from the lower end of the support plate 431 and is provided in a concave half-arc shape and is rotatably accommodated and supported by the lower end of the rotating body 411, and the pair of support plates 431 It is configured to connect the rear end, and the central upper portion is composed of a connection plate 433 in which a wire input groove 433a into which an electric wire is inserted is formed.

With this configuration, the rotating body 411 of the rotating member 410 is accommodated in the support member 420 and supported by the support cover member 430, and the plug ( When the angle adjustment protrusion 431b is selectively coupled to the angle adjustment groove 411a while 100 is rotated downward, the angle of the plug 200 with respect to the receiver housing 100 is adjusted stepwise.

Here, the angle adjustment groove (411a) may be formed at various angles, but is preferably formed to form a 45 degree angle as shown, and the angle adjustment protrusion (431b) is 45 so as to correspond to the angle adjustment groove (411a). It is preferable that it is formed while forming a degree angle. That is, as shown in Figs. 8 to 10, while the plug 200 is rotated with respect to the receiver housing 100, the angle adjusting protrusion 431b is selectively coupled to the angle adjusting groove 411a formed at an angle of 45 degrees. Then, the plug 200 can be installed at an angle of 0 degrees, 45 degrees, and 90 degrees with respect to the receiver housing 100.

In addition, when the receiver housing 100 and the plug 200 are horizontally angle-adjusted between one end of the pair of supports 421 on the bottom of one end of the receiver housing 100, the cylindrical coupling part 412 It is preferable that the upper stopper support protrusion 160 supporting the upper surface of the) protrudes. That is, as shown in FIG. 8, when the plug 200 is horizontally installed at 0 degrees with respect to the receiver housing 100, the upper surface of the cylindrical coupling part 412 is the upper stopper support protrusion 160 It is supported by and can be firmly fixed in a horizontal state.

Further, in the guide hole 510 of the cover 500, a lower stopper support jaw supporting the bottom surface of the cylindrical coupling part 412 when the plug 200 is vertically angled in the receiver housing 100 at the other end ( 520) is preferably formed. That is, as shown in FIG. 10, when the plug 200 is installed vertically at 90 degrees with respect to the receiver housing 100, the lower surface of the cylindrical coupling part 412 is the lower stopper support jaw 520 It is supported by and can be firmly fixed in a vertical state.

Furthermore, a guide plate 170 for guiding an electric wire introduced into the cylindrical coupling part 412 is formed between the other ends of the pair of supports 421 on the bottom surface of one end of the receiver housing 100, and the It is preferable that a through hole 180 through which the wire W connected to the circuit board 110 passes through the upper side of the guide plate 170 is formed on the bottom of the receiver housing 100. That is, when the plug 200 rotates with respect to the receiver housing 100 while adjusting the angle in the vertical direction, the circuit board 110 is connected to the plug 200 through the through hole 180 of the housing. Since the electric wire W is protected while being guided and supported in the guide plate 170, the electric wire W is prevented from being twisted or damaged.

Meanwhile, according to the present invention, a plurality of wireless microphones are configured to receive and output voice signals generated from a plurality of wireless microphones by a single receiver, so that a plurality of wireless microphones can be used through one receiver. do.

To this end, as shown in FIGS. 11 and 12, an RF receiving module 111, an audio signal processing unit 112, and a main CPU 113 are installed on the circuit board 110.

The RF receiving module 111 has four receiving channels (CHA, CHB, CHC, CHD), and receives and outputs voice signals wirelessly transmitted from four wireless microphones (MICs) through the receiving antenna 300. Is configured to do. That is, the RF receiving module 111 has four receiving channels, and transmits voice signals (MIC_1, MIC_2, MIC_3, MIC_4) wirelessly transmitted from four wireless microphones (MIC) through the receiving antenna 300. Receive and print.

Here, the RF receiving module 111 may have four different receiving channels (CHA, CHB, CHC, CHD) for each connection to four wireless microphones (MIC). Specifically, it is preferable that the four receiving channels (CHA, CHB, CHC, CHD) are in 901 to 945 MHz, and are formed with channels in units of approximately 3 MHz. That is, in the present invention, instead of the digital method of the 24 GHz band with a short reception distance, the analog method is implemented in the 901 to 945 MHz band, and the possibility of collision between devices due to a frequency similar to a short-range communication device such as a mobile phone or a wireless LAN is minimized. It is desirable to be.

Here, a binary CDMA method may be used as the wireless transmission/reception method of the wireless microphone (MIC) and the RF receiving module 111. The binary CDMA method is known to be effective in transmitting and receiving a multi-level signal into a binary waveform, thus making the structure of a transmission/reception system remarkably simple and effective for multimedia transmission such as voice, audio, and video.

The audio signal processing unit 112 is configured to convert and output at least one audio signal MIC_1, MIC_2, MIC_3, and MIC_4 output from the RF receiving module 111 into a signal suitable for output to a speaker.

More specifically, as shown in FIG. 13, the audio signal processing unit includes a low noise amplifier 112a, an audio processing unit 121b, a codec 121c, a mixer 121d, a filter 121e, and an amplifier 121f. Including.

The low-noise amplifier 112a amplifies a weak high-frequency signal of the transmitter wirelessly received by the antenna of the receiver, thereby lowering the noise figure of the entire receiver.

The audio processing unit 121b separates the high frequency signal amplified through the low noise amplifier 112a into a carrier wave and an audio signal. In other words, the high frequency signal including the carrier wave used by the microphone for wireless communication with the receiver and the audio signal loaded on the carrier wave by modulating the user's voice input to the microphone (MIC) is separated into a carrier wave and an audio signal.

The codec 121c demodulates an audio signal separated from the audio processing unit 121b into an audio signal. In addition, the codec 121c demodulates header information included in the high-frequency signal received from the microphone MIC and analyzes which microphone from among the plurality of microphones MIC.

The mixer 121d balances the voice signals input from the codec 121c and gives sound effects, and mixes them when several voice signals are input at the same time.

When multiple audio signals are input at the same time, the mixer 121d mixes the audio signals according to a set program so that the audio signals are output together, only the audio signals set as the priority are output, or the audio signal with a high priority is The volume can be increased and the audio signal with a low priority can be output by lowering the volume.

The filter 121e filters the voice signal output from the mixer 121d to block and remove the voice signal out of the audible frequency band, and remove noise included in the voice signal in the audible frequency band to improve sound quality. .

The amplifier 121f amplifies the audio signal (more specifically, the audio signal filtered by the filter 121e) output from the mixer 121d.

In general, a plurality of the filters 121e and the amplifier 121f are provided, and the audio signal output from the mixer 121d is repeatedly filtered and amplified several times to improve sound quality. As shown, two filters 121e are provided, and the amplifier 121f is provided between the two filters 121e.

The voice signal filtered and amplified through the filter 121e and the amplifier 121f is input to an amplifier (not shown), amplified, and then input to an audio device through the plug 200 and output as sound.

The main CPU 113 is in charge of controlling the operation of the RF receiving module 111 and the voice signal processing unit 112, and stores an identification code for identifying the four wireless microphones (MICs) and stores four wireless microphones. It is installed to identify the voice signals MIC_1, MIC_2, MIC_3, and MIC_4 output from the MICs.

Meanwhile, according to the present invention, it is preferable that a display unit 190 connected to the main CPU 113 is provided on the upper surface of the receiver housing 100 to display the status of each microphone channel and the remaining power. That is, as shown in FIG. 14, each microphone channel status display (current frequency display, pairing display, etc.) and power remaining amount may be displayed on the display unit 190.

As described above, the receiver for a wireless microphone according to the present invention is configured by integrating an RF receiving module having a plurality of receiving channels in one receiver, so that a receiver is not individually provided and handled for each wireless microphone as in the prior art. It is possible to cope with this even if the number increases, and there is an advantage in that a plurality of wireless microphones can be used through a single receiver to achieve cost reduction and volume reduction.

On the other hand, in the present invention, amine polyglycol condensate (Aminepolyglycol condensate) for 100 parts by weight of ABS resin when molding the receiver housing 100 and the cover 500 in order to enhance the efficacy of the release of useful components to the human body while having antibacterial properties. 15 parts by weight, titanium dioxide powder 2.5 parts by weight, vinyl oxymosilane (Vinyl Oximeino Silane) 5 parts by weight, zeolite fine powder 2.5 parts by weight, benzoguanamine 4 parts by weight, allantoin 10 parts by weight may be further added.

That is, the receiver housing 100 and the cover 500 are portions that are gripped and used by the user, and are preferably configured to have antimicrobial properties while having an effect of releasing useful components to the human body.

At this time, the reason for the addition of amine polyglycol condensate is that in the case of amine polyglycol condensate, it maintains a surface-active function that is harmless to the human body so that resins and other substances are very well mixed, and the most important function is to induce micronization of bound particles. It is added to rapidly increase the smoothness of the molded surface.

In addition, titanium dioxide decomposes and removes formaldehyde, a variety of volatile organic compounds that cause sick house syndrome and second house syndrome. As such, photocatalytic reactions are actively used in the energy environment field. It is actively used to decompose and remove organic matter and air pollutants because it can decompose and remove pollutants that are scattered everywhere.

In addition, vinyl oxymosilane (Vinyl Oximeino Silane) is added because it promotes gelation and provides uniform dispersibility and molding stability of inorganic matter.

In addition, zeolite fine powder is a kind of aluminum silicate mineral, also known as zeolite, and is a representative far-infrared radiation material and a material having ion exchange properties. Therefore, it has excellent deodorization and purification properties.

In addition, benzoguanamine is added to maintain adhesion stabilization while maintaining antistatic properties.

In addition, Allantoin is a natural substance extracted from places such as comfrey roots, sugar beets, and wheat sprouts, and acts on mental and physical stability through skin soothing and breathing promotion.

As a result of testing the antimicrobial properties of the receiver housing and cover having such a structure, it was confirmed that it had an antimicrobial activity of 99.99% against fungi (Gliocladium virens ATCC 9645) and Staphylococcus aureus. In addition, as a result of testing the antistatic properties, it was confirmed that it has an antistatic function.

In addition, far-infrared emission characteristics were also confirmed, and as a result of conducting a far-infrared radiation test according to KFIA-F1-1005 using an FT-IR spectrometer, the far-infrared emissivity (effective far-infrared wavelength band: 5-20㎛) at 30℃ was confirmed to be 0.889. And the radiation energy (W/㎡) was also 2.99×10 ² .

As described above, although the present invention has been illustrated and described in connection with specific embodiments, it is known in the art that various modifications and changes are possible without departing from the spirit and scope of the invention indicated by the claims. Anyone who grows up will be easily aware of it.

100: receiver housing 200: plug
300: receiving antenna 400: angle adjustment means
500: cover

Claims (5)

A receiver housing in which a circuit board is installed inside and a battery mounting groove in which a battery electrically connected to the circuit board is mounted is formed on a bottom surface, and is provided at the bottom of one end of the receiver housing and inserted into an input port of an audio device to be coupled , A plug electrically connected to the circuit board, a receiving antenna electrically connected to the circuit board and discharged from the circuit board to the other side of the receiver housing to wirelessly receive a signal from a microphone, and a bottom surface of one end of the receiver housing And an angle adjusting means installed in and coupled to the other end of the plug to enable the plug to be angled downward with respect to the receiver housing and fixed at an angled position, and one end of the receiver housing can be rotated. It is hingedly coupled to selectively open and close the battery mounting groove of the receiver housing, and comprises a cover in which the plug is discharged at one end and a guide hole for guiding the rotation of the plug is formed,
The angle adjusting means is formed in a cylindrical shape, angle adjusting grooves are formed at equal intervals along the circumferential direction on both sides, and a rotating body in which a wire entry hole is formed at the other end, and is formed protruding from one end of the rotating body to one side, A rotating member including a cylindrical coupling portion having a hollow inside and fixed by inserting and fixing the other end of the plug at one end and communicating with the wire entry hole; A support member comprising a pair of supports protruding downward from the bottom of one end of the receiver housing, and having a rotational support groove formed at a lower end of the upper end of the rotating body to be rotatably received and supported; Consisting of being in close contact with and supporting the side of the rotating body and the side of the support, a fixing part protruding laterally at the top and fixed to the bottom of the receiver housing through a screw is formed, and the angle at equal intervals along the circumferential direction on the inner surface of the lower part A pair of support plates on which an angle adjustment protrusion is selectively inserted into the adjustment groove is formed, and a support cover part protruding inward from the lower end of the support plate and provided in a concave half-arc shape to be rotatably accommodated and supported by the lower end of the rotating body, and the It is configured to connect the rear ends of a pair of support plates, and it is composed of a connection plate in which a wire entry groove into which wires are inserted is formed at the upper center of the center.
An upper stopper support protrusion supporting the upper surface of the cylindrical coupling part is protruded on the bottom surface of one end of the receiver housing when the receiver housing and the plug are horizontally angled between one end of the pair of supports,
In the guide hole of the cover, a lower stopper support jaw is formed at the other end to support the bottom surface of the cylindrical coupling portion when the plug is vertically angled in the receiver housing,
A guide plate is formed on the bottom of one end of the receiver housing to guide the electric wire introduced into the cylindrical coupling part between the other ends of the pair of supports,
A through hole through which an electric wire connected to the circuit board passes is formed on the lower surface of the receiver housing,
The circuit board has four reception channels, an RF receiving module receiving and outputting a voice signal wirelessly transmitted from four wireless microphones through the receiving antenna, and at least one voice signal output from the RF receiving module. A voice signal processing unit that converts and outputs a signal suitable for output to a speaker, and controls the operation of the RF receiving module and the voice signal processing unit, and stores an identification code for identifying the four wireless microphones. A main CPU for identifying the voice signals output from wireless microphones is installed, the voice signal processing unit low-noise amplifier for low-noise amplification of a high-frequency signal transmitted and received from the RF receiving module, and a high-frequency signal amplified by the low-noise amplifier. An audio processing unit for separating an audio signal from, a codec for demodulating the audio signal output from the audio processing unit into an audio signal, a mixer for mixing the audio signal output from the codec, and noise from the audio signal output from the mixer It comprises a filter to remove, and an amplifier for amplifying and outputting the voice signal output from the filter,
And a display unit connected to the main CPU to display a status of each microphone channel and an amount of power remaining on the upper surface of the receiver housing.
delete delete delete The method of claim 1,
When molding the receiver housing and cover, based on 100 parts by weight of the ABS resin, 15 parts by weight of aminepolyglycol condensate, 2.5 parts by weight of titanium dioxide powder, 5 parts by weight of vinyl oxymosilane (Vinyl Oximeino Silane) 5 parts by weight, zeolite fine powder 2.5 parts by weight, 4 parts by weight of benzoguanamine, and 10 parts by weight of allantoin are mixed and molded.

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