JPS5830673B2 - Jiyushinouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a signal recording and reproducing device, a first receiving section that receives a received signal of a first band and generates a first audio signal,
a second receiver that receives a second band reception signal and generates a second audio signal; and a third receiver that receives a third band reception signal and generates a third audio signal. an audio signal monitoring means, a first selection means for selectively supplying any one of the first to third audio signals to the audio signal monitoring means, and the first to third audio signals. and a second selection means for selectively supplying any one of the third audio signals to the signal recording and reproducing device, the receiving device comprising: an FM-AM-TV radio; It is most suitable for application to tape recorders with receivers.

In the text, the term "receiving section" refers to the FM radio reception sound 11L AM radio reception section, the VHF television reception section, the UHF television reception section, and the like.

Furthermore, "signal recording/reproducing means" means a tape recorder, sheet recorder, VTR, EVR, etc.

Furthermore, "monitoring means" means speakers, earphones, cathode ray tubes, etc.

In a conventional receiving device of this type, for example, a tape recorder with an FM-AM radio receiver, the reception signal of one band being recorded in the tape recorder section (for example, F
M signal) can be monitored by a monitor means.

However, it has not been possible to monitor a received signal (for example, an AM signal) in a band different from the band of the signal being recorded.

In this text, "monitoring" refers to listening to or viewing input signals being recorded in a recording/playback section such as a tape recorder section, and to listening to or viewing input signals being recorded in a recording/playback section such as a tape recorder section.
, , 1' and listening to or viewing an input signal.

Therefore, in such a tape recorder, if you want to record the received signal of the other band (for example, FM signal),
It is not possible to monitor the received signal of the other band (e.g. AM signal), and the received signal of one band (e.g. F signal) cannot be monitored.
When monitoring the received signal (for example, AM signal) of the other band, it was not possible to monitor or record the received signal (for example, AM signal) of the other band.

Therefore, two broadcast waves (i.e. FM signal and A
In order to listen to both signals (M signal) at the same time even if they are shifted in time, at least one tape recorder with a radio receiver for recording and one radio receiver for monitoring are required. However, it was not possible to perform such operations with a single tape recorder equipped with a radio receiver.

Recently, FM-AM radios have been developed that allow a tape recorder to record the received signal of one band (e.g., FM signal) while monitoring the received signal of another band (e.g., AM signal). A tape recorder with a receiver is being considered.

However, in such tape recorders, FM and A
If you make it possible to receive not only the M signal but also the TV signal, if you record one of the FM signal and the TV signal while monitoring the other, beats will occur, so you will not be able to perform good recording and monitoring. do not have.

The present invention was invented to correct the above-mentioned defects, and it is possible to monitor an audio signal in a band different from the audio signal recorded by the signal recording/reproducing device using a monitoring means, and in this case, This eliminates the possibility of a beat occurring between the audio signal to be recorded and the audio signal to be monitored.

Next, an example in which the present invention is applied to a tape recorder with an FM-AM-TV radio receiver will be described with reference to the drawings.

Note that in this embodiment, TV means VHF television, but it may also be UHF television.

First, the mechanical configuration shown in FIGS. 1 to 11 will be described. As shown in FIG. Each half is equipped with a radio receiver section 8.

The tape recorder section 7 is formed with a cassette storage section 3 in which the tape cassette 2 is removably stored, similar to a normal cassette tape recorder, and this cassette storage section 3 is provided with a lid 4. .

Further, a built-in microphone 5 and a level meter 6 are provided adjacent to the cassette storage section 3, respectively.

The tape recorder section 7 further includes an eject button 10,
Rewind button 11, stop button 12, play button 1
3. Operation buttons consisting of a fast forward button 14 and a record button 15 are arranged in exactly the same way as in a normal cassette tape recorder.

The radio receiver section 8 includes, like a normal radio receiver,
Radio on/off control lever 20, antenna 21, tuning knob 22, volume knob 23, and speaker 2
4 are arranged respectively.

The radio receiver section 8 is further provided with an FM-AM dial display section 25, and an FM pointer 2 is provided on this dial display section.
6 and AM pointer 27 are provided separately from each other.

Further, a TV channel switching knob 28 and a band selection knob 29 are provided adjacent to the dial display section 25, respectively.

This TV channel switching knob may be similar to the TV channel switching knob used in a normal television receiver, and is located adjacent to the TV channel switching knob 28 as in the case of a normal television receiver. A channel display window 30 is provided.

Also, around the band selection knob 29, λM, AM and T
FM display window 31 for displaying which of the V signals is being received and reproduced. An AM display window 32 and a TV display window 33 are provided, and these windows display FM, A
M and TV are labeled respectively.

As shown in FIGS. 2 to 6, the band selection mechanism 40 includes a band selection shaft 41 to which a band selection knob 29 is fixed at one end. It is rotatably supported on the shaft.

A main cam 42 is integrally fixed to the band selection shaft 41, and a driven cam 43 is rotatably supported.

Furthermore, the band selection shaft 41 is inserted into an elongated hole 47 formed in the center of the band display selection board 46.

The band selection display board 46 is provided with a band-shaped covering part 48 at one end thereof, and adjacent to this covering part, an FM display opening 49, an AM display opening 50, and a TV display opening 51 are provided.
are formed respectively.

The other end of the band selection display plate 46 is rotatably supported on one end of an intermediate lever 56 by a lock pin 55.

The lock pins each face a pair of locked protrusions 5758 formed around the outer periphery of the driven cam 43,
A locked groove 59 is formed between these protrusions.

The intermediate lever 56 is rotatably supported at its intermediate portion by a chassis 62 via a fulcrum shaft 61.

An engagement pin portion 63 formed at the other end of this lever is inserted into a cut groove 65 of the recording operation lever 64.

Further, the intermediate lever 56 is formed with a locking arm portion 60, and one end of the intermediate lever is fixed to the locking arm portion by a traction coil spring 66, so that the intermediate lever is rotated clockwise in FIG. is constantly energized.

An intermediate portion of the recording operating lever 64 is pivotally supported by the chassis 62 by a fulcrum pin 67, and a suppressed pin portion 68 is formed at the other end of this lever.

A pressing end 70 constituted by one end of the oscillating plate 69 is arranged opposite to this pressed pin part, and the other end of this plate is rotatably attached to one end of the recording operation plate 11 by a fulcrum pin 72. It is pivoted.

A long hole 73 is formed in the recording operation plate 71, and a guide pin 74 fixed to the chassis 62 is inserted into the long hole, so that this plate can freely reciprocate linearly in the left and right direction in FIG. It has become.

Then, in conjunction with the pressing operation of the recording button 15, it moves forward in the right direction in FIG. 2 against a traction spring (not shown), and when the recording button 15 moves back, it is moved by the traction coil spring as shown in FIG. It is designed to move backward to the left (as shown).

The vicinity of one end of the swing plate 69 is inserted into an opening formed near one end of the radio operating plate 75.

The radio operating plate 75 is arranged to be able to reciprocate in the vertical direction in FIG.

That is, when the radio on/off operating lever 20 is moved from the off side to the on side, the radio operating plate 75 moves downward from the chain line position in FIG. 2 to the solid line position. .

In this case, the swing plate 69 rotates clockwise in FIG. 2 from the chain line position in FIG.
It is designed to reach the position shown by the solid line in the figure.

In addition, when the radio on/off operating lever 20 is moved back from the on side to the off side, contrary to the case described above, the operation is completely opposite to that in the forward movement described above. .

A color plate is attached to the driven cam 43 at a portion 8 facing the band-shaped covering portion 48 provided at one end of the band selection display plate 46.
1 is provided.

That is, a semi-cylindrical rising portion 82 is formed on the driven cam 43, and the color plate mounting portion 81 is provided on an arcuate flat plate portion 83 connected to the upper end of this rising portion.

The color plate mounting portion is lower than the other portions of the arc-shaped flat plate portion 83, and a protrusion 84 is provided at its outer end, and hook-shaped protrusions 85 and 86 are provided at both ends. .

Reference numerals 87 and 88 are openings for cutting out the mold.

A color plate 89 whose surface is colored in a predetermined color, for example yellow, is attached to the color plate attachment portion 81, and in this attachment state, the color plate 89 is elastically pressed by hook-shaped protrusions 85 and 86. ing.

As clearly shown in FIGS. 3 and 6, an endless protruding wall 90 is formed on the inner surface of the driven cam 43, and an arcuate cam groove 91 is formed inside this wall by this protruding wall 90. .

A tracing roller 92 is inserted into this cam groove, and this roller is attached to one end of an L-shaped switch operating lever 95.

The intermediate portion of the switch operating lever 95 is rotatably supported on the chassis 62 by a fulcrum shaft 61, as clearly shown in FIG.

At the other end of this lever, a pair of actuating arms 97, 9B are formed, respectively, similar to the switch actuating plate 96 shown in FIG.

A recording changeover switch 101 is located between these operating arms.
The operation protrusion 102 is held between the two.

As clearly shown in FIG. 3, an engaging pin portion 105 is formed on the inner side of the driven cam 43 adjacent to the locked groove 59, and this engaging pin portion is connected to a circle formed on the outer surface of the main cam 42. It is inserted into the arcuate engagement groove 106.

Further, an arc-shaped engagement hole 107 is formed in the driven cam 43 adjacent to the engagement pin portion 105, and an engagement pin portion 108 formed on the outer surface of the main cam 42 is inserted into this hole. .

As clearly shown in FIGS. 3 and 8, the boss portion 110 of the main cam 42 is inserted into the winding portion 112 of the wire spring 111.
A pair of arm portions 113 and 114 of this spring are elastically pressed against a pair of engagement pin portions 105 and 108, respectively.

As clearly shown in FIG. 5, three positioning engagement grooves 35, 36, and 37 are formed on the circumferential surface of the main cam 42, and an engagement roller attached to one end of the positioning lever 38 is formed in these grooves. 39 is adapted to be engaged selectively.

The positioning lever 38 is connected to the chassis 62 by the fulcrum shaft 61.
The positioning lever is rotatably supported by a shaft, and a locking arm 52 is formed on this positioning lever.

The positioning lever is always urged clockwise in FIG. 5 with the fulcrum shaft 61 as a fulcrum by a traction coil spring 53 to which one end of the latching arm is affixed.

As clearly shown in FIGS. 3 and 5, an endless protruding wall 115 and a non-endless protruding wall 116 are disposed on the inner surface of the main cam 42, facing each other.

These protruding walls form arcuate cam grooves 117 and 118, respectively.

A tracing roller 119 is inserted into the cam groove 117, and this roller is attached to one end of the switch operating plate 96.

A guide pin portion 125 is formed on the inner surface of one end of the switch actuation plate, and this pin portion is inserted into a guide slot 126 formed in the chassis.

Further, the switch operating plate 96 is slidably and elastically supported by the chassis 62 by a pair of hook-shaped support arms 127 and 128 formed on the chassis 62.

The switch operating plate 96 has a pair of operating arms 129°130.
are formed respectively, and an operating protrusion 132 of a monitor changeover switch 131 is sandwiched between these operating arms.

A tracing roller 120 is inserted into the cam groove 118, and this roller is attached to one end of the clutch actuation lever 134.

An intermediate portion of the clutch actuation lever 134 is rotatably supported on the chassis 62 by a fulcrum pin 135, and the clutch actuation lever is rotated counterclockwise in FIG. Always energized in the direction.

An engagement pin portion 136 formed at the other end of the clutch actuation lever 134 is inserted into an engagement hole 138 formed at one end of the clutch actuation plate 137 of the FM-AM tuning mechanism 140 shown in FIG. .

The clutch actuating plate 137 is connected to the chassis 62 and the mounting plate 13 attached to the chassis, as shown in FIG.
9, it is supported so as to be capable of linear reciprocating movement in the left-right direction in FIG.

As clearly shown in FIG. 11, an engagement plate portion 142 having a semicircular recess 141 is formed in the intermediate portion of the clutch actuation plate.

This semicircular recess has a large number of engaging claws 1 on both sides thereof.
Clutch discs 147 having respective numbers 45 and 146 are inserted in their ring-shaped engagement grooves 148.

A clutch mounting portion 150 with a hexagonal cross section is formed in the middle of the tuning shaft 149, and this clutch mounting portion is fitted into a center hole 151 with a hexagonal cross section of the clutch disc 147, so that this clutch disc can be tuned. axis 14
It is integrally attached to 9.

Tuning knobs 22 are attached to the tips of the tuning shafts 149, and drive bevel gears 152, 153 are attached to the tuning shafts on both sides of the clutch mounting portion 150.
are each mounted rotatably.

These bevel gears are connected to both ends of the clutch mounting portion 150 of the tuning shaft 149, the chassis 62, and the mounting plate 13.
9 prevents its movement in the axial direction.

A large number of engagement pawls 1 are provided on the inner surfaces of the drive bevel gears 152 and 153.
55 and 156 are formed respectively, and these engaging claws 1
55 and 156 are opposed to engaging pawls 145 and 146, respectively, formed on the clutch disc 14γ.

Driven bevel gears 159 and 160 are meshed with the driving bevel gears 152 and 153, respectively, and these bevel gears are connected to a mounting plate 163 attached to the chassis 62 with a fulcrum shaft 1.
It is rotatably supported by 61 and 162.

Parts of an AM dial thread and an FM dial thread (both not shown) are fixed to the driven bevel gears 159 and 160, respectively.

The other part of the AM dial thread is fixed to the AM pointer 27 and the AM variable capacitor (not shown), and the other part of the FM dial thread is attached to the FM pointer 26 and the AM variable capacitor (not shown).
They are respectively fixed to M variable capacitors (not shown).

Next, the electrical system of this embodiment will be described with reference to FIG.

FIG. 12 shows a state in which the TV signal is recorded by the tape recorder section 7 and the SAM signal is monitored by the radio receiver section 8.

In FIG. 12, the antenna 21 includes the antenna 21 shown in FIGS.
The movable contact 185 of the monitor first changeover switch 181 of the monitor changeover switch 131 shown in the figure and the movable contact 187 of the recording first changeover switch 183 of the recording changeover switch 101 shown in FIG. 3 are respectively connected. There is.

These changeover switches 181 and 183 are connected to TV side type fixed contacts 189 and 195, which are connected to the input side of the TV tuner 201, respectively, AM side fixed contacts 190 and 196, and connected to the input side of the FM tuner 203, respectively. FM side fixed contacts 191 and 197 are provided, respectively.

Note that in this case, the TV tuner 201 may be substantially the same as the audio signal circuit of the television receiver.

The TV side fixed contacts 192 and 198 of the monitor second changeover switch 182 of the monitor changeover switch 131 and the recording second changeover switch 184 of the recording changeover switch 101 are connected to the output side of the TV tuner 201, respectively. .

The second monitor changeover switch 182 is switched in conjunction with the first monitor changeover switch 181, and these first and second changeover switches 181 and 182 are switched by operating the operation protrusion 132 of the monitor changeover switch 131.
It is possible to switch between them.

Further, the second recording changeover switch 184 is switched in conjunction with the first recording changeover switch 183, and these first and second changeover switches 183 and 184 are respectively switched by switching operation of the operation protrusion 102 of the recording changeover switch 101. It is now possible to

On the output side of the AM tuner 202, the second monitor changeover switch 182 and the second recording changeover switch 184 are connected to the AM tuner 202.
Side fixed contacts 193 and 199 are connected, respectively.

Furthermore, the FM tuner 203 has a monitor second changeover switch 182 and a recording second changeover switch 184.
Side fixed contacts 194 and 200 are connected, respectively.

The movable contact 186 of the second monitor changeover switch 182 is connected to the on-side fixed contact 208 of the monitor radio changeover switch 204 which is operated by the radio on/off operation lever 20 shown in FIG.

Further, the off-side fixed contact 209 of this switch 204 is connected to the connection middle point 2 between the recording amplification circuit 213 and the recording/reproducing head 214.
16.

Also, the movable contact 2 of the monitor radio changeover switch 204
06 is connected to the speaker 24 via a power amplification circuit 212.

The movable contact 188 of the second recording changeover switch 184 is
It is connected to an on-side fixed contact 210 of a recording radio changeover switch 205 that is operated by a radio on/off operating lever 20 shown in the figure.

Further, the microphone 5 is connected to the off-side fixed contact 211 of this switch 205 via a microphone amplifier 215.

Also, the movable contact 20 of the recording radio changeover switch 205
γ is connected to a recording/reproducing head 214 via a recording amplifier 213.

Note that the recording radio changeover switch 205 is switched in conjunction with the monitor radio changeover switch 204, and these changeover switches 204 and 205 are respectively switched by switching the radio on/off operating lever 20.

Next, the operation of this embodiment will be described with reference to FIGS. 1 to 12.

In the initial state, the radio on/off operating lever 20 shown in FIG. 1 is switched to the off side.

Therefore, in FIG. 12, the connection midpoint 216 between the recording amplification circuit 213 and the recording/reproducing head 214 is connected to the input of the power amplification circuit 212 via the off-side fixed contact 209 and movable contact 206 of the monitor radio changeover switch 204, respectively. connected to the side.

The output side of the microphone amplification circuit 215 is connected to the input side of the recording amplification circuit 213 via the off-side fixed contact 211 and the movable contact 207 of the recording radio changeover switch 205, respectively.

Therefore, in this state, by appropriately operating the operation buttons 11 to 15 of the tape recorder section 7 shown in FIG. Normal reproduction in which sound is emitted through the speaker 24 can be performed.

That is, when the tape recorder section 7 is set to the recording mode, the first
As shown in FIG. 2, the output signal of the microphone 5 is amplified by the microphone amplification circuit 215 and then sent to the recording amplification circuit 213 via the off-side fixed contact 211 and the movable contact 207 of the recording radio changeover switch 205, respectively. added to.

For this purpose, the output signal is amplified by this recording amplification circuit, and then recorded on the tape of the tape cassette 2 through the recording/reproducing head 214.

Also, when the tape recorder section 7 is set to playback mode, the 12th
As shown in the figure, the playback signal played back by the recording/playback head 214 from the tape in the tape cassette 2 is transmitted through the connection middle point 216 and the off-side fixed contact 209 and movable contact 206 of the monitor radio changeover switch 204, respectively. The signal is added to the power amplification circuit 212 and amplified by the power amplification circuit 212 before being emitted through the speaker 24.

On the other hand, in the initial state, when the radio on/off operating lever 20 shown in FIG. 1 is switched from the off side to the on side, the power switch (not shown) of the radio receiver section 8 is turned on, and the changeover switch 204
Movable contacts 206 and 201 of 205 and 205 are connected to on-side fixed contacts 208 and 210, respectively, as shown in FIG.

Therefore, in this state, depending on the switching state of the recording and monitoring changeover switches 101 and 131 shown in FIGS. 3 and 4, one signal of FM, AM, and TV is monitored through the speaker 24. .

Further, when the tape recorder section 7 is set to the recording mode, any one of these signals is recorded on the tape of the tape cassette 2 through the recording/reproducing head 214.

For example, in the state shown in FIG. 12, the received signal absorbed by the antenna 21 is recorded by the first changeover switch 183.
The signal is supplied to the TV tuner 201 through the movable contact 187 and the TV side fixed contact 195, respectively.

Further, the AM tuner 202 is supplied with a signal received by an internal antenna 180 such as a Parr antenna.

Therefore, an AM signal is obtained as the output of the AM tuner 202.

This AM signal is transferred to the monitor second changeover switch 182.
AM side fixed contact 193 and movable contact 186, and ON side fixed contact 208 of the monitor radio changeover switch 204.
and the movable contact 206, respectively, to the power amplification circuit 2.
12.

Therefore, the AM signal is amplified by this power amplification circuit and then emitted through the speaker 24.

Also, a TV signal is obtained as the output of the TV tuner 201.

This TV signal is transferred to the recording second changeover switch 184.
The recording amplification circuit 21 is connected via the TV side fixed contact 198 and movable contact 188 and the on-side fixed contact 210 and movable contact 207 of the recording radio changeover switch 205, respectively.
3.

Therefore, this TV signal is amplified by this recording amplification circuit, and then recorded on the tape of the tape cassette 2 through the recording/reproducing head 214.

As mentioned above, in the tape recorder with radio receiver 1 shown in this embodiment, any one of the received signals can be recorded by the tape recorder section 7, but the speaker 24
The received signals that can be monitored by the band selection mechanism 40 are regulated to a certain extent by the band selection mechanism 40, as described below.

When either the FM signal or the TV signal is recorded on the tape recorder section 7, the other cannot be monitored through the speaker 24, earphones, etc.

Next, the operation when selecting a radio band using the band selection mechanism 40 will be described with reference to FIGS. 1 to 8. When selecting a radio band, first turn the band selection knob 29 shown in FIG. , AM, and TV to select the type of signal band to be recorded.

This switching operation is performed by the main cam 42 via the band selection shaft 41.
However, the switching rotation of the main cam is performed against the force of the spring 53, which is transmitted to the main cam 42 via the positioning lever 38 and the engagement roller 39, which are clearly shown in FIG.

At a predetermined switching position of the main cam 42, the engagement roller 39 engages one of the engagement grooves 35 to 37 (in the case shown, the AM platform engagement groove 36) to position the main cam 42. I do.

Along with the above switching rotation of the main cam 42, the driven cam 43
rotates in the same way.

That is, as the main cam rotates, the engagement pin 108 of the main cam presses the arm portions 11B and 114 on either side of the linear spring 111, causing the spring to elastically deform. Therefore, the other arm is connected to the engagement pin 10 of the driven cam 43.
Press 5.

Therefore, the driven cam 43 rotates following the main cam 42.

Due to the above-mentioned rotation of the driven cam 43, the color plate 89 is
Display window 31. It faces above either the AMM display window 32 or the TV display window 33 (the AMM display window 32 in the illustrated case).

Further, the contoured roller 92 is located at a predetermined position in the cam groove 91 (the solid line position is the AM position, the one-dot chain line position is the FM color position, and the two-dot chain line position is the TV position).

). Incidentally, since the farting roller 92 approaches the band selection shaft 41 sequentially in the order of the FM color position AM position and the TV position, the switch actuation lever 95 is moved in accordance with these positions.
rotates about the fulcrum 61 and reaches a predetermined rotational position.

The operating arms 97 and 98 of this lever switch the recording changeover switch 101 to a predetermined switching state among FM, AM, and TV.

By the above-mentioned switching rotation of the main cam 42, the profiling roller 1
19 is a predetermined position of the cam groove 117 (the solid line position is the AM position, the one-dot chain line position is the FM position, and the two-dot chain line position is the TV position).

).

Incidentally, since the flattening roller 119 approaches the band selection shaft 41 one after another in the order of the TV position, AM position, and FM position, the switch operating plate 96 reaches a predetermined reciprocating position according to these positions.

The operating arms 129 and 130 of this plate switch the monitor changeover switch 131 to a predetermined switching state among FM, AM, and TV.

Further, by the above-mentioned switching rotation of the main cam 42, the profile roller 120 is moved to a predetermined position in the cam groove 118 (the solid line position is the AM position, and the two-dot chain line position is the TV position).

) or the position where it is crimped onto the outer periphery of the main cam (this position indicated by the dashed line is the FM position).

) collapse or move to one position.

Furthermore, since the flattening roller 120 approaches the band selection shaft 41 one after another in the order of FM position, TV position, and AM position, the clutch actuating lever 134 rotates about the fulcrum pin 135 according to these positions and rotates for a predetermined number of times. reach the moving position.

Therefore, this lever moves the clutch actuating plate 137 to the one-dot chain line position, the two-dot chain line position, and the solid line position in FIG. 5, respectively, depending on the FM position, TV position, and AM position.

The solid line position in FIG. 9 of the clutch actuating plate 131 is TV
This is the selected state, and in this state, the clutch actuating plate 1
37 is in the neutral position.

Therefore, the ring-shaped retaining groove 1 is formed in the semicircular recess 141 of this plate.
Since the clutch disc 147 that is engaged at 48 is in the neutral position, the engaging claws 145° and 146 at the sides of this disc
Engagement pawls 155°156 of drive bevel gears 152 and 153
not engaged with.

Therefore, even if the tuning knob 22 is rotated, only the tuning shaft 149 and the clutch disk 147 are rotated, and the tilting drive bevel gears 152, 153 are not rotated, so that FM or AM tuning operation is not performed. It won't happen.

The position of the clutch actuating plate 137 shown in dashed lines in FIG. 9 is the AM selection state, and in this state, the clutch actuating plate 137 is moving to the left in FIG.

Therefore, since the clutch disk 147 that is engaged with this plate is in the left position in FIG. 9, the engagement claw 145 of this disk is engaged with the engagement claw 155 of the drive bevel gear 152.

Therefore, when the tuning knob 22 is rotated, this rotation is transmitted to the driven bevel gear 159 via the tuning shaft 149, clutch disk 147, and drive bevel gear 152, respectively.

Therefore, since this driven bevel gear rotates, the AM dial thread fixed to this bevel gear is driven.

For this purpose, the AM variable capacitor rotates to perform predetermined AM tuning, and the AM pointer 21 moves the FM-AM dial display section 25 to display the predetermined tuning state.

The position of the clutch actuating plate 137 shown by the two-dot chain line in FIG. 9 is the FM selection state, and in this state, the clutch actuating plate 137 is moving to the right in FIG.

Therefore, since it is in a state symmetrical to the AM selection state described above,
The rotation of the tuning knob 22 is transmitted to the driven bevel gear 160, thereby performing a tuning operation of the FM variable capacitor and a predetermined movement of the FM pointer 26, respectively.

Therefore, the FM, AM and TV selected by the main cam 42
Any one band can be monitored through the speaker 24.

In addition, when the FM band or AM band is selected, predetermined tuning and tuning can be performed by rotating the common tuning knob 22 in either case, and this tuning state is FM-AM. It is displayed on the dial display section 25.

When TV is selected, a predetermined channel can be selected by operating the TV channel switching knob 28, and the channel selection status is displayed on the channel display window 30.

Which of these bands is selected can be determined by checking the longitudinal knob 44 of the band selection knob 29 on the FM display window 31.
．． It can be recognized by whether it faces the AM display window 32 or the TV display window 33.

In the above-mentioned monitoring state, if it is desired to record the band being monitored on the tape recorder section 7, the user can press the playback button 13 and the record button 15, respectively, in the same way as the normal recording operation of the tape recorder.

In this case, since the radio on/off operation lever 20 is on the on side, the radio operating plate 75 and the swing plate 69 are in the solid line position in FIG.

Therefore, when the recording operation plate 71 moves forward in the right direction in FIG. Press the section 68.

For this reason, this recording operating lever rotates clockwise in FIG. Figure 6 Rotates counterclockwise.

Therefore, the lock pin 55 formed in this intermediate lever is
In accordance with the rotational position of the driven cam 43, the locking groove 59, the locking protrusion 57 moves forward to either the left side in FIG. 6, or the locking protrusion 58 to the right side in FIG.

For this reason, the driven cam 43 is locked in a state in which switching to another band cannot be performed.

When the lock pin 55 moves to the left side of the locking protrusion 57 in FIG. 6, the rotation of the driven cam 43 in the counterclockwise direction in FIG. is prevented by being pressed against the protruding wall 90.

Further, when the lock pin 55 has moved to the right side of the locked protrusion 58 in FIG. 6, the rotation of the driven cam 43 in the clockwise direction in FIG. 92 is crimped onto the protruding wall 90 to prevent this.

As the lock pin 55 moves forward as described above, the band selection display plate 46 connected to this pin moves upward in FIG. A color plate 89 appears on any one of 51.

Therefore, since the color of the color plate 89 appears in any one of the three display windows 31 to 33 shown in FIG. 1, the user can recognize which band of signals is being recorded on the tape recorder section 7. I can do it.

In the tape recorder 1 with a radio receiver of this embodiment, a signal in a band different from the signal in the band currently being recorded can be monitored through the speaker 24, and so-called alternate programs can be recorded.

In this case, perform the operations described above to first start recording the signal of the desired band.

Next, in the same manner as described above, the band selection knob 29 is operated to switch and rotate the main cam 42 to the position of the band desired to be monitored.

In this case, depending on the position of the driven cam 43, it may not be possible to switch and rotate the main cam 42 to a predetermined band position.

That is, when the driven cam 43 is at the <AM position as shown in FIG. Since you can also bring your own equipment, you can also monitor FM, AM, and TV signals.

However, when the driven cam 43 is at the <FM position as shown in FIG. 8B, the main cam 42 can be brought to the AM position, but cannot be brought to the TV position.

This is because when trying to further rotate the main cam 42 from the AM position to the TV position, the main cam 42 is attached to the end of the engagement hole 107 and the engagement pin 105 of the driven cam 43 that is locked at the FM position. Since the ends of the engagement pin 108 and the engagement hole 106 are in contact with each other, the main cam cannot rotate clockwise in FIG. 8B.

Furthermore, when the driven cam 43 is in the <TV position as shown in FIG. 8C, the main cam can be brought to the AM position.
For the same reason as in the case described above, it cannot be brought to the FM position.

Therefore, in this tape recorder 1 with a radio receiver, there is no risk of beats occurring when an FM signal and a TV signal are received simultaneously.

Note that when the main cam 42 is switched and rotated as described above to the position of the predetermined band that is desired to be monitored, the monitor changeover switch 131 is switched to the predetermined band, as in the case of the rotation of the main cam described above. , a predetermined band can be monitored.

At the same time, the clutch disk 147 of the FM-AM tuning mechanism 140 moves to a position corresponding to the band to be monitored, so that the tuning knob 22 or the TV channel switching knob 28 can be used to select the signal to be monitored and adjust the tuning. can be done.

When the band to be monitored is different from the band recorded by the tape recorder section 7, the tuning knob 22
Even if you operate the , you cannot select or adjust the tuning of the band to be recorded.

Therefore, recording is performed in the channel selection and tuning adjustment state at the time the main cam 42 is switched from the position of the band to be recorded (that is, the state at the time the band to be recorded is being monitored), resulting in recording errors. Less afraid.

In the above embodiment, the first input signal processing means was a speaker or an earphone, and the second input signal processing means was a tape recorder section.

However, the first and second input signal processing means may also be tape recorder sections, and these tape recorder sections may simultaneously record two types of received signals.

Since the present invention has the above-described configuration, it is possible to use the monitor means to monitor an audio signal in a band different from the audio signal recorded by the signal recording/reproducing device, and therefore it can be used in a variety of ways. At the same time, it is possible to avoid the possibility of a beat occurring between the audio signal to be recorded and the audio signal to be monitored.

[Brief explanation of the drawing]

The drawings show an example in which the present invention is applied to a tape recorder with an FM-AM-TV radio receiver, and FIG. 1 is a perspective view of the entire tape recorder with a radio receiver, and FIG.
The figure is a front view of the band selection mechanism in the tape recorder with radio receiver shown in Figure 1, Figure 3 is a sectional view taken along line I-1 in Figure 2, and Figure 4 is a sectional view taken along
5 is a sectional view taken along the line V-IV, and FIG. 5 is a front view of the main cam and its related members in the band selection mechanism shown in FIG.
6 is a front view of the driven cam and its related members in the band selection mechanism shown in FIG. 2, FIG. 7 is an exploded perspective view of the band selection mechanism shown in FIG. Front views of the limiter spring and its related components in different modes, FIG. 9 is a cross-sectional view of the FM-AM tuning mechanism, and FIG. 10 is the FM-AM shown in FIG. 9.
FIG. 11 is a rear view of the tuning mechanism, FIG. 11 is a sectional view taken along the line XI--XI in FIG. 9, and FIG. 12 is a block diagram of the electrical system in the tape recorder with radio receiver shown in FIG. In addition, in the symbols used in the drawings, 7 is a tape recorder section, 8 is a radio receiver section, 20 is a radio on/off operation lever, 22 is a tuning knob, 40 is a band selection mechanism, 42 is a main cam, and 43 is a Followed cam, 101 is a recording changeover switch, 131 is a monitor changeover switch, 140 is an FM/AM tuning mechanism, 201 is a TV
202 is an AM tuner, 203 is an FM tuner, and 147 is a clutch disc.

Claims (1)

[Claims] 1 a signal recording and reproducing device; a first receiving unit that receives reception number 4 of the first band and generates a first audio signal;
a second receiving section that receives reception number 4 of the third band and generates a second audio signal; and a third reception section that receives reception number 4 of the third band and generates a third audio signal. and; audio signal monitoring means; first selection means for selectively supplying any one of the first to third audio signals to the audio signal monitoring means; and the first to third audio signals. a second selection means for selectively supplying one of the three audio signals to the signal recording and reproducing device; the third audio signal is supplied to the audio signal monitoring means by the first selecting means; and the second selecting means supplies the third audio signal to the audio signal monitoring means; The first selection means and the first audio signal are configured such that the first selection means only prevents the first audio signal from being supplied to the audio signal monitor means when the first audio signal is being supplied to the recording/reproducing apparatus. 2. A receiving device comprising a mutual association mechanism in which two selection means are mutually related.