JPH0446793U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the electric circuit of the microphone sensitivity switching device of this invention; Fig. 2 is a handy type audio equipment having a built-in microphone sensitivity switching device according to the first embodiment of this invention. A schematic perspective view showing the external appearance of a cassette tape recorder in a horizontal position placed on a desk in a conference room when the cassette tape recorder is used to record comments made by an unspecified number of people during a meeting; Figure 3 is a schematic diagram showing the electrical cut-off state of the microphone sensitivity changeover switch of the microphone sensitivity changeover device built into the cassette tape recorder shown in Figure 2; A tape recorder used to record the user's dictation or record some comments of a specific person or a very limited number of people in an interview, held in a vertical position by the user's hand. FIG. 5 is a schematic diagram showing the electrical conduction state of the microphone sensitivity switching switch of the microphone sensitivity switching device built in the cassette tape recorder of FIG. 2; FIG. A schematic perspective view showing the external appearance of a handy-type cassette tape recorder, which is an audio device with a built-in microphone sensitivity switching device according to the second embodiment of the invention; FIG. 7 shows the third embodiment of the invention. A schematic perspective view showing the external appearance of a handy type cassette tape recorder, which is an audio device with a built-in microphone sensitivity switching device according to
7 is a schematic sectional view taken along the section A--A in FIG. 7, showing a microphone sensitivity changeover switch in an electric circuit of a microphone sensitivity changeover device built into the cassette tape recorder shown in FIG. 10...Cassette tape recorder, 28...Microphone opening, 36...Microphone, 38...
... Microphone amplifier, 44 ... Changeover switch, 48 ... Mercury switch, 60 ... Cassette tape recorder, 62 ... Press operation gripping member (switching switch), 70 ... Cassette tape recorder,
72...Press button (changeover switch).

Claims (1)

[Claim for Utility Model Registration] Microphone sensitivity can be switched, and the usage situation when the first microphone usage sensitivity is required is different from the usage situation when the second microphone usage sensitivity is required. It is used in audio equipment, and is equipped with a microphone sensitivity switch that detects the difference between the two usage situations and sets the microphone to the microphone sensitivity required for each of the two usage situations. Features a microphone sensitivity switching device.