JPS58122650A - Disc size discriminating method - Google Patents

Abstract

PURPOSE:To discriminate the size, by setting addresses while searching intermusic with an output of an address sensor and an intermusic sensor provided at a pickup arm, registering the intermusic, and comparing the address with an address set in response to a disc size. CONSTITUTION:In starting a pickup arm 5 at a rest position A with an operation panel (not shown), the arm is turned to a position C with a motor 9 and a mechanism driving system 7. The system is switched to an electromagnetic drive DD system (not shown), high-speed lead-in is performed an address sensor provided at the arm 5 starts the count, and every time an intermusic sensor provided at the tip of the arm 5 detects the intermusic, the address is registered from the innermost circumference. The address of the intermusic at the outermost circumference registered and a size discriminating address set in response to each disc size are compared to discriminate the size of a disc. Thus, the size is discriminated surely at the lead-in.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc size determination method, and is particularly directed to a disc size determination method for a record player capable of performing nolograms.

The object of the present invention is to provide a disc size determination method that can automatically and reliably determine the disc size during a lead-in operation.

In the disc size determination method according to the present invention, during lead-in operation of a pickup arm equipped with an address sensor for detecting arm position and a song interval sensor, the song number is searched based on the output of the -1 sensor, and the address sensor is activated. The disc size is determined by setting an address based on the beginning and registering the song interval, and comparing the registered anchor point between the outermost songs with the size determination address set corresponding to each disc size. It is supposed to be done.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic oblique W4 diagram showing the record player 11 according to the present invention, in which (a) shows the closed state and (b) shows the open state. As shown in FIG. 1, the record player 1 according to the present invention has a so-called front loading configuration in which a disc (not shown) can be set from the front of the main body.

In other words, the 0 (113
n/(by pressing the jlO88 key 28, the slide base 4 on which the turntable 3 is mounted moves forward and protrudes to the front of the main body), after placing the disc on the turntable 3 in this operating state. open again
By pressing en/close 4-28, the slide base 4 is moved back to the closed state and the disc is set. In addition, the closed state (a
), full automatic performance is possible by program selection, and in OWN state (b), manual performance is possible. Although the door to be provided on the front side of the main body is not shown, the door also performs the opening/closing movement f1 in conjunction with the slide base 4.

The pickup arm 5 is located at the vIN part of the slide base 4 in order to reduce the width of the sphere base 4 and to facilitate the pitting of the disc onto the turntable 3, and this position is used as a rest position. This pickup arm 5 has an area X shown in FIG. 2 as a performance area,
By rotating the upper part of the J iscro from the rest position A in the direction opposite to the trace direction 1 during playing, After reaching the outer position B, there is a lever that rotates in the C1 direction toward the pre-specified song interval.
The rotation range from the rest position 1'fA to the A device B is controlled by the first drive system (hereinafter referred to as "first drive system") that mechanically drives the gear 5). The pickup arm 5 is selectively driven by a second drive system (hereinafter referred to as DD1 system) which directly drives the pickup arm 5 by electromagnetic force.

An arm stopper 18 is provided on the player housing side, and an arm stopper 4a is provided on the slide base 4 side.
At this time, when the pickup arm 5 is in contact with the arm stopper 1a (rest-in), the big horn plate 27 and the magnets 1-
Since the spring 30 is interposed between the spring 30 and the hole 5r-2ξ, the bottle member 12 fixed to the big up solate 27 and driven by the mechanical drive system 7 is connected to the spring 30.
Resisting the urging force of 0, it waits in a disabled state.

When the slide base 4 moves forward, the arm stopper 18 and the pickup arm 5 are separated, so that the bottle member 12 is no longer pressed, and the pickup arm 5 rotates backward until it comes into contact with the arm stopper 4a. By doing this, the pickup arm 5 does not get in the way when the disc is attached or removed, and the space factor when storing the disc is improved.

3 and 4 are a schematic plan view showing the drive mechanism of the pickup arm and a perspective view of each part before assembly. In FIGS. 3 and 4, the mechanical drive system 7 includes a rotary member 8 that has gears on its outer periphery and is rotatable coaxially or concentrically with the rotation center axis of the pickup arm 5, and a drive source. a rotary motor 9; a power transmission section 10 that includes a combination of gears and transmits the driving force of the rotary motor 9 to the rotating member 8;
The latch mechanism 11 is provided with a latch mechanism 11 provided on the rotating member 8, and the latch mechanism 11 selectively engages with the bin member 12 which is interlocked with the pickup arm 5 in accordance with the rotation of the rotating member 8. -Rest position 1i for M5! From tA to the digit 1 near the center of the disk! To'
(Driving in the first rotation range up to C. Shoes-1
The mechanism 11 includes a swinging arm 14 that is pivotably supported by a bin 13 implanted in the rotating member 8, and a rotating member 14 for guiding a guide bin 15 that is integrally provided with the swinging arm 14. 8 and the guide hole 16 formed in the swing arm 1
A spring member 17 engages with the swinging arm 14 in order to position the swinging arm 14 in the engagement position P or non-engagement position Q in which the swinging arm 4 can be engaged with the bottle member 12, and the swinging arm 4 is in the engagement position. P, the pickup arm 5 is rotated in accordance with the rotation of the rotation member 8 by gripping the bottle member 12 in cooperation with the grip member 18 provided on the rotation member 8, and the pickup arm 53 is When reaching lfC, the pickup arm 5 is reversed to the non-engaging position Q and disengaged from the bin member 12, thereby stopping the drive of the pickup arm 5.

17'j, DD drive system 19 includes, for example, a movable magnet installed on the big 71 tube arm side and a fixed coil installed on the arm stand side, and is approximately 30 cm from the disk center @D from the outer edge of the LP disc. The pickup arm 5 is driven in the second rotation range to a slightly outer position B. The movable magnet 20 is fixed to a rotating shaft (not shown) of a pickup arm 5 rotatably held by a bearing 22 of an arm stand 21 so as to face a yoke 23 at a predetermined distance from each other.
Different magnetic poles in the circumferential direction are arranged alternately in the thickness direction so as to correspond to drive coils and speed detection coils, which will be described later. On the other hand, a board 24 is attached to the arm stand 21 so as to be located between the magnet 20 and the yoke 23, and this board 24 has a pair of parts that work together with the magnet 20 to rotate the pickup arm 5 by electromagnetic force. Drive coils 2.5a, 25b and a speed detection coil 26 for detecting the rotational speed of the pickup arm 5 are fixedly attached. The pair of drive coils 25a and 25b rotate approximately 180° around the central axis of rotation of the pickup arm 5.
The speed detection coil 26 is disposed in a positional relationship of about 90 degrees with the drive coils 25a and 25b. A drive current is supplied to the drive coil 258.25b from a horizontal drive circuit, which will be described later, when the pickup arm 5 reaches the position [ ) (shown in the third figure), and when the pickup arm 5 reaches the position C, the drive system changes to the mechanical drive system 7. to one DD drive system, and in the second rotation range (position D to position B)
Driving is performed by the D drive system 19, and at the same time, the output of the speed detection coil 26 is fed back to the horizontal drive circuit to control the speed 11 #II of the pickup 7-5. In order to ensure the switching from the mechanical drive system 7 to the DD drive system 19, an overlap portion (position D to 0) is provided in the first and second rotation ranges.

For example, below the magnet 20 (is the pickup arm 5
A pickup plate 27 is provided rotatably with respect to the rotation axis of the pickup arm 5. The pickup arm 5 is attached to the magnetic holder 28 so that its position can be adjusted in the horizontal direction.
It rotates as one. A spring 30 is interposed between the pickup plate 27 and the magnet holder 28,
The pickup plate 27 also has the above-mentioned bottle member 12.
is fixed.

As shown in FIG. 5, the pickup plate 27 is provided with a slit portion 31 consisting of a large number of slits to enable address setting corresponding to the rotational position of the pickup arm 5.
is formed. And the pickup arm 5 is the second
An address A sensor 32a and an address B sensor 32b are provided so as to be located in the slit portion 31 of the pickup plate 27 when the rotation range is at position 11D-8) in FIG. Are A and B sensors 32a and 32b constantly monitoring the tip position of the pickup arm 5 according to the address? The address B sensor V- is 90 degrees ahead of the address A sensor in phase. Furthermore, the area sensor 4f-34 is located on the rotation locus of the shutter portion 33 of the pickup plate 27 and detects the D9-D area (positions MD to B in FIG. 3) of the pickup arm 5. and detect the end area
- An area sensor 35 is provided. 1) The output of the D area sensor 34 is used to switch from the J drive system 7 to the DD drive system 19 during lead-in operation. By the output of the end area sensor 35, [1 gram performance 9
Normal full auto performance.

To enable end detection based on each output of an address A2 address B sensor during manual performance. These sensors 328, 321), 34 and 35 consist of light-emitting and light-receiving elements placed opposite to each other with the tongue plate 27 in between, and are mounted on the arm stand 21 as shown in FIG. It is housed in a holder 36.

In FIGS. 3 and 4, the rotating member 8 of the mechanical drive system 7
Above is the elevation cam 37 of the pickup arm 5.
is provided. ■One end of an elevation shaft 38 held by an arm stand 21 so as to be movable up and down is in contact with the elevation cam 37, and the other end of the elevation shaft 38 is in contact with an elevation shaft 38 that supports the pickup arm 5. It is fixed to the plate 39. Arm stand 21 and ■
A spring 50 is interposed between one end of the elevation shaft 38 and urges the elevation shaft 38 downward. On the mechanical chassis 41 on which the mechanical drive system 7 is mounted, switches 42 and 43 are used to detect the completion of raising and lowering the pickup arm 5 due to the elevation operation.
A switch 44 is provided for detecting the rest position W (position A in FIG. 3) of the pickup arm 5.

These switches are activated by being pressed by a cam portion 8a provided on the outer periphery of the rotating member 38.The ascent completion detection switch 42 detects when the pickup arm 5 starts to descend by the elevation operation during the lead-in operation. It is also used to detect the immediately preceding position.In other words, during lead-in operation, the rotation of the pickup arm 5 precedes the rotation of the pickup arm 5 by the DD drive system 19 in the second rotation range after the drive operation of the pickup arm 5 is completed. The mechanical drive system 7 that
In response to the output of the ascent completion detection switch 42, the robot is placed on standby before the final stroke of the nilevage 3-in operation. The rotating part @8 of the mechanical drive system 7 starts rotating again in order to lower the pickup arm 5 in response to a lowering command issued when the pickup arm 5 reaches the desired song interval -F.

FIG. 6 shows a schematic perspective view of the pickup arm assembly including the aforementioned DD drive system 19 and big door arm plate 27. A song interval sensor 46 is provided at its tip for distinguishing between songs and sound grooves by utilizing the difference in reflectance between sound grooves and songs. As shown in FIG. 7, the song interval sensor 46 uses a single light emitting element 49 such as a light emitting diode positioned in a vertical plane including the tip 48 of the cartridge 47 as a common light source.
This light emitting element 49 and two light receiving elements 50a and 50b such as phototransistors are arranged along the rotating direction of the pickup arm 5 so as to be symmetrical with respect to the vertical plane. It is preferable that they be arranged in the vicinity of . As shown in FIG. 8, the light-receiving element 50a precedes the light-receiving element 50b when the pickup arm 5 rotates toward the outer circumference of the disk, and receives reflected light from the disk 6 based on the light emitted from the light-emitting element 49. It generates an output according to the amount of light received. On the other hand, the light-receiving element 50b precedes the light-receiving element 50a when the pickup arm 5 rotates toward the inner circumference of the disk, and similarly generates an output corresponding to the amount of light reflected from the disk 6 based on the light irradiated from the light-emitting element 49. do. The light receiving elements 50a and 50b are respectively shown in FIG.
When outputs as shown in a) and (b) are generated and the stylus tip 48 of the cartridge 47 is located on the center of the song, the outputs (a) and (b) will be as shown in Fig. 9 with respect to the center of the west gate. The relationship is as shown.

FIG. 10 is a block diagram showing an example of the control section, and FIG. 11 is a circuit diagram showing a specific example of a portion of FIG. 10th
In the figures and FIG. 11, numeral 51 is a system controller 13 which centrally controls all of the blocks, and is composed of, for example, a four-hit neurocomputer. This system controller 51 receives command signals from the operation section 2, signals indicating the operating state of the system from the switch section 52, address signals from the address sensor part 53, and inter-track sensor part 5.
Inter-song signals etc. from 4 are applied. In response to these signals, the system controller 51 sends control signals to the DD drive system 19, dexynchronizer circuit 58, and the like.

The operation section 2 is provided with all the operation keys for program selection, commands 1- for instructing various operations, and light emitting diodes for displaying the operations of these keys. The arm drive unit 56 is a system control J.
The arm drive motor of the mechanical drive system 7 (
This is an interface that drives the @rotation motor) 9. [
] The ding drive unit 57 is an interface that drives the ding mode 14 for moving the slide base 4 (FIG. 1) in response to a control signal from the system controller 51. The digital synchro circuit 58 is an interface circuit for sending a recording synchro signal to a tape deck (not shown) that is selectively connected in response to a control signal from the system controller 51 when the synchro switch 61 is turned on. Here, the synchro output terminal 62 of this system is connected to the remote pause terminal of the tape deck, and when the synchro output terminal 62 of this system is put in the recording pause state and the synchro switch 61 is turned on, the deck goes into the recording state while the player is playing. This is a function in which the deck enters a pause state when the player is in the rubation-up state or while the arm is moving, and the deck repeats pause-recording (pause release) every time one pulse is input to the pause terminal. There is.

The switch section 52 includes switches 42 and 44 for detecting the completion of raising the pickup arm 5 and the rest position.
Also provided are switches 63 and 64 for detecting the closed and open states of the player body.

FIG. 12 is a circuit diagram showing a specific example of the inter-song sensor part 54 shown in FIG. In this figure, between songs +:
As explained in FIG. 7, the J-46 consists of a single light emitting element 49 and two light receiving elements 50a and 50b, each of which receives reflected light from the disk 6 and receives the light. Generates output according to silver. The two sensor outputs are connected to operational amplifier OP1. After being amplified by an amplifier circuit 65 including OP2, it is supplied to a differential amplifier circuit 66, and the output from one sensor is also supplied to an AC amplifier circuit 67.

The two sensor outputs obtained at the output end of the amplifier circuit 65 have waveforms as shown in FIG. 13<a>. Figure 13 (a
), (a) shows the song interval, (b) shows the lead-in groove, and (c) shows the lead-out groove.

Differential amplifier circuit 66 inverts the two sensor outputs.

It has an operational amplifier OP3 having a non-inverting input, and differentially amplifies the two sensor outputs to obtain an output waveform as shown in FIG. 13(b). It is clear from FIG. 13(b) that the differential signal between songs has a substantially S-shaped curve.

The differential signal becomes each non-inverting input of an operational amplifier OPa constituting an inter-song comparator 68 and an operational amplifier OP5 constituting a zero-cross comparator 69. Operational amplifier O
A reference level VT)4 is applied to the inverting input terminal of P a, and the reference level VTH changes according to the sensitivity selection by the sensitivity selector switch 70. Furthermore, even if the sensitivity is the same, the pickup arm 5 is raised, It also changes depending on the down movement.

This is done so that even if the amount of light received by the light-receiving elements 50a and 50b of the song-interval sensor 46 changes between when the song is up and when the song is down, it is possible to reliably distinguish between song gaps and tone grooves by changing the reference level VTH. , the reference level VTH is switched by turning the switch means 71 on and off in accordance with the ruby operation of the pickup arm 5. The output of the operational amplifier OP4 is inputted as an inter-musical signal to the system controller 51 (terminal 15 in FIG. 11).

The AC amplifier circuit 67 cuts the direct current from one sensor output of the amplifier circuit 65 using a capacitor CO.
After performing AC amplification, the signal is supplied to the non-inverting input terminal of the operational amplifier OF]7 constituting the search comparator 17-lator 90. In the zero cross comparator 69,
The operational amplifier OPs has the identification reference voltage FL B 2 as an inverting input, detects the zero point of the differential signal from the differential amplifier circuit 66, and outputs a zero cross signal. On the other hand, the operational amplifier OP y of the search comparator 90 has the same reference level VTH as the operational amplifier OP 4 as its inverting input, and receives the signal from the AC amplifier circuit 67.
A signal below the C reference level V1H is output as an inter-track registration permission signal. The zero-crossing signal and the inter-track registration permission signal are input to the gate circuit 72, and the zero-crossing signal is input when the pickup arm 5 is down based on the mute signal output from the system controller 51 (end A2 in FIG. 11). When the signal is up, a song Ill registration permission signal is input to the system controller 51 (terminal 14 in FIG. 11). In the system controller 51, the zero cross signal and the song f! Detection of the center between songs during performance is performed based on No. 8.

In addition, the on/off operation of the switch means 71 mentioned above-18
= The operation is performed based on the above Micoat signal.

FIG. 14 is a circuit diagram showing a specific example of the DD drive system 19 in FIG. 10. The DD drive system 19 includes drive coils 25a and 25b connected in series, a horizontal drive circuit 73 that supplies drive current to the drive coils, and a speed detection coil 2.
6, and an amplifier circuit 74 that amplifies the minute detection voltage of this detection coil. The horizontal drive circuit 73 includes a differential amplifier 75 made up of an operational amplifier OPa, and an inverter 76 made up of an operational amplifier OP's with a gain of 1. The band servo signal is applied to the non-inverting input terminal, and the speed servo signal from the speed detection coil 26 amplified by the amplifier circuit 74 is applied, and the difference between the two with respect to the reference voltage is amplified and current is supplied to the drive coils 25a and 25b. By doing so, the pickup arm 5 is driven while controlling the speed. The band servo signal and the speed servo signal are each sent from the system controller 51. On/off depending on l
The signal is supplied to the differential amplifier 75 as required by switch means 77 and 78 which are turned off. It has an amplifier circuit 741J and an amplifier OP +o, which amplifies the minute amount of power generated by the speed detection coil 26 according to the rotational speed of the amplifier arm b, and outputs it to the horizontal drive circuit 73 as a speed servo signal. In the amplifier circuit 74, VR+ is a volume for offset adjustment.

Here, the band servo operation will be explained.

As explained based on FIG. 13(b), the differential output of the differential amplifier circuit 66 in the inter-song sensor part 54 exhibits a figure-eight curve characteristic as shown in FIG. 15 for the inter-song period. The differential output becomes the band servo signal. If the needle tip 48 is now moved to the x (am) outer circumference with respect to the center of the song, a band servo signal of V (v) is generated. In response to this signal, current is supplied from the horizontal drive circuit 73 to the drive coils 25a and 25b, and the needle tip 48 moves in the inner circumferential direction until it comes to the center F between the tracks. Controlling the sub-light 48 in this way so that it is always positioned at the center 1 between songs is called band servo.

The band servo operation is controlled so that it starts when the pickup arm 5 reaches the top of the song interval during program play and ends when the down is completed.

When the pickup arm 5 is operated by the system controller 51 based on commands such as start and stop from the operation unit 2 and other program play, the drive voltage generated by the drive voltage generation circuit 79 (FIG. 11) is calculated. A reference voltage is applied to the inverting input terminal of the amplifier OPa, and the drive voltage generation circuit 79 generates a reference voltage based on a control signal indicating high-speed, inner circumferential direction and outer circumferential direction drive output from terminals 26, 27 and 28 of the system controller 51. The moving speed and direction of the pickup arm 5 can be controlled by changing the value and polarity of the driving voltage.

In FIG. 14, a cancellation coil 80 is integrally provided with the drive coil 25b and is connected in series with the speed detection coil 26. This canceling coil 80 is intended to increase the S/N of the output of the speed detection coil 26 by canceling noise components generated by the drive coils 25a and 25b, and to improve the stability of the 21-speed 14-no-vo. It is.

In other words, when current is applied to drive coils 25a and 25b to drive pickup arm 5, magnetic flux is generated by this current, and alternating current flows to speed detection coil 26, creating a noise component, but canceling coil 80 is used to detect speed. coil 26
By placing it in series with the AC component, the alternating current component can be canceled.

A variable resistor VR2 is connected in parallel to the canceling coil 80, and the amount of canceling is variable by this variable resistor VR2.

FIG. 16 is a circuit diagram showing a specific example of the address sensor part 53 in FIG. 10, which includes a light emitting section 53A having four light emitting diodes and a light receiving section 53A having four phototransistors arranged opposite to these light emitting diodes. Section 53B
According to address A, B sensor 32a, 32b, DO
An area sensor 34 and a semiconductor area sensor 35 are configured, and a pickup play 1 that interlocks with the pickup arm 5 controls the gap between the light emitting part 53Δ and the light receiving part 53B.
・27 rotates. Each output from the light receiving section 53B is a wave 22.
- The waveform is shaped by the inverters 82 to 85 constituting the shaping circuit 81, and during the lead-in operation of the pickup arm 5,
The data is output to the disk 6 at the timing shown in FIG. The end area signal (a) is sent to terminal 10 of the system controller 51, the address A signal (b) is sent to terminal 12,
The address B signal (c) is connected to terminal 13, and the DDI rear signal (d
) are applied to terminal 11, respectively. The role of each sensor is as explained in FIG.

Next, the operation of the above-described configuration will be explained.

First, the operation at the time of program performance by specifying the third song → first song of the 30 cm LP II will be explained based on the timing charts of FIGS. 18A and 18B.

It is assumed that the disc 6 has already been set, the player body is in the closed state, and the pickup arm 5 is in the rest position. When setting 70 grams, after turning on the power at time [i], turn on the music selection key r31 of the operation section 2, and a light emitting diode (hereinafter abbreviated as LED) r3J
(u) appears to be lit but actually blinks once and then lights up)
, indicating that the third song has been programmed. Next, the song selection key “
When 14 is turned on, LEDrlJ('V) lights up in the same way. If you make a mistake in setting the program, the program will be cleared by turning on the stop key, so all you have to do is set the varus again. After completing the program set, the time point [
When the start key is turned on at step 2, terminal 8 (h) of the system controller 51 becomes L level, and the mechanical drive system 7
The rotary motor 9 (J) starts rotating in the arm lead-in direction, and 71-1- starts the lead-in. This time ED
At the same time as "R START" (W) lights up to indicate the start of auto lead-in, the rest position detection switch 44(a) is reversed.

Pickup arm 5 continues lead-in and needle tip 48
At the time t3 when the signal reaches the center spindle (near the center of the disk), the output (0) of the DD Area Sensor V-34 is input at H level to the terminal 11 of the system controller 51. and 28 (
a+) becomes the respective level, the DD drive system 19 is operated, and the Do drive range is entered from here. After entering the DD drive range, the latch of the mechanical drive system 7 is released, and at this point the drive system of the pickup arm 5 moves from the mechanical drive system 7 to D.
It switches to the D drive system 19. Even after the wrap is released, the mechanical drive system 7 continues to operate in the lead-in direction ahead of the DO drive system 19, and the cam portion 8a of the rotating member 8 turns off the ascent completion detection switch 42, and the output of this switch 42 < f ) is input to terminal 39 at H level, and in response, terminal 8 (h
) is H level.

Terminal 9 (J) transitions to L level, rotating motor 9 (j
) is reversed in the lead-out direction, and when the ascent completion detection switch 42 is turned on again, terminals 8 (h) and 9 (J)
becomes H level, the rotation motor (j>) is stopped, and the special machine is operated with the 1st rotation completion detection switch 42 turned on.

While the high-speed lead-in operation by the DD & dynamic system 19 continues, the system controller 51
Address A sensor 3 input from 3 to terminals 12 and 13
Address counting is started based on the pulse signals from 2a(p) and B sensor 32b(q), and when the predetermined address is reached, t4 is 25-, and v-chi is started to register between songs. When the pickup arm 5 rises (when searching), the part 5 of the sensor between songs
4 to the terminal 14 and receives the song interval %@(S) input to the terminal 15 in response to the song interval Ω recording enable signal (r>), and sequentially registers the address from the song interval on the innermost circumference of the disc.Pickup At a time point 15 when the arm 5 reaches the search end address outside the outer edge of the 3Qcml-p disc, a final disc size determination is performed.

Size determination is 17cIIl, 25cm and 30cm in advance.
The value obtained by adding, for example, 3 to the address indicating the drop position corresponding to the disc size of cm, and the last registered song (I
This is done by sequentially comparing the addresses of songs on the outer circumference of I as shown in the flowchart of FIG. The actual disk size is determined from the unloading position. In addition, the voice position of the famous song near the last registered song registered between songs at the time of the 4th hit is compared with the value of the falling address -5 (5th address before the falling position) determined by size judgment, and the value of the falling address -5 (5th address before the falling position) is compared. If the relationship of each address in the vicinity of a song ≧ descending address - 5 is established, the registered song is also modified such that the song is not considered as a song and is deleted.

After the size determination is completed, terminal 2 of the system controller 51
7 (+> becomes L level, terminal 28 (m) becomes H level (terminal 26 remains L level), and D D drive system 19
As a result, the pickup arm 5 moves at high speed toward the third song, which is the first program song, and enters an operation for detecting the third song. At this time (time t5
), at the same time, the terminal 4 (d> becomes L level, starts the phono motor 55, and rotates the turntable 3 (e). Also, the LED r3J (u
) repeats blinking from time t5 until the performance of the third song ends. To explain the song interval detection operation according to the flowchart of FIG. 20, the needle tip 48 of the pickup arm 5, which moves at high speed toward the inner circumference of the disk, comes off at a location before, for example, address 4 (registered address + 4) of the registered address of the third song. Then (time t
6) The terminal (k) becomes H level, and the moving speed of the arm becomes low. Then, in the low-speed driving state, the detection of the song interval is performed from the beginning before the third song, and when the song interval signal (S) from the song interval sensor part 54 is input to the terminal 15, the system controller 51 detects the pulse of the song. At the rising edge (time t7), the terminal 27 (+> is set to L level) and the DD drive system 19 is turned on.
At the same time, the LED r that had been lit until then
Turn off the start J (W> and “up” (V)).

At the same time, the terminal 8(h) is set to the 1-level, and the rotary motor 9(j) of the mechanical drive system 7, which has been in a standby state, is operated to start the elevation down operation. At this time, if the terminal 3 (C) becomes level, the collector of the transistor Q2 (shown in Figure 11) is set to level ``'', thereby making the switch means 77 (shown in Figure 10.14) conductive and turning on the band servo. The pickup arm 5 is driven in the horizontal plane by the drive system 19 in response to a band servo signal (differential signal of outputs of two inter-track sensors) from the inter-track sensor part 54. With this band servo, even if there is eccentricity on the disc, the needle tip 4 of the pickup arm 5 can follow the deviation between songs as the disc rotates.
8 can be lowered and positioned at the center of the song.

The elevation down operation continues, and at time t8, the cam portion 8a (shown in the third figure) of the rotating member 8 turns on the descent completion detection switch 43, and when the output (a) of the motor becomes the L level, the terminal 9<i> Then, the rotary motor 9(j) of the mechanical drive system 7 stops, the down operation is completed, and the performance of the third song begins. At the same time, the terminal 3 (C) transitions to H level, turning on the transistor Q2, thereby turning on the switch means 77.
becomes non-conductive and turns off the band servo. In addition, the mute signal (b) output from terminal 2 disappears and becomes low level) The output of buffer 86 also becomes low level, and transistor Q3 forming muting circuit 87
By turning off the muting relay 88, a performance state is entered.

Due to the transition of the mute signal (b) to the L level, the transistor Q4 in the inter-song sensor part 54 (see FIG. 12) is turned off, so that the switch means 71 becomes conductive, and the operational amplifier OP4. By switching the reference level VTH of OP7, the up/down range of the sensor part 54 between songs is set to town. Historically, due to the transition of the mute signal (d) to the L level, the output of the buffer 89 also becomes the L level, and the switch means 78 (No. 10.14)
(shown in the figure) is brought into a non-conductive state to cut off the speed servo signal from the speed detection coil 26 in the DD drive system 19 to the horizontal drive circuit 73, thereby turning off the speed servo. At the same time, the outputs of the eight buffers become L level, causing the resistance R+ in the drive voltage generation circuit 79 (shown in FIG. 11) to rise.

DD drive system 19 through R2, R3 and diode D+
The voltage balance between the inverting input terminal and the non-inverting input terminal of the differential amplifier 75 (shown in FIG. 14) is slightly disturbed to provide an anti-skating amount during performance.

If one song interval is not found in the song interval detection, for example, 1 other day further back than the registered address of the third song (registered address - 1
), and when an interval between songs is detected, the pickup arm 5 is stopped and controlled 30- to shift to the one-step elevation down operation as described above. 1. If you cannot find the gap between songs even if you V-chip the back, move the pickup arm 5 at high speed toward the outer periphery.
When the pickup arm 5 reaches the registered address +4>, the moving direction of the pickup arm 5 is reversed, and the pickup arm 5 is moved toward the inner circumference at a low speed, and the same song interval detection operation as described in #J is repeated. If a song interval cannot be detected even after performing the song interval detection operation a predetermined number of times, for example, four times, the program moves to the song selection operation for the next program song.

The third song was played, and just before the end of the performance,
For example, at address 2 before the registered address of the fourth song, the system controller 51 enters a special state where the zero cross signal (r) and inter-song signal (S) are input at terminals 14 and 15. In this state, an H level zero cross signal (r> is input to the terminal 14 of the system controller 51, and furthermore, the terminal 15
The system controller 51 detects that the needle tip has arrived between the third and fourth songs at the timing of the rise of the zero cross signal jJ(r) after the positive one pulse that is the inter-song signal (S> is applied). (time rs). At time t9 when the end of the performance of the third song is detected, a mute signal (b) of level 1 is output from terminal 2, and muting relay 88 is turned on by turning on transistor Q3. to cut off the audio signal system.At the same time, switch the sensor part 54 between songs to up, and turn on the speed servo of the DD drive system 19.At this time, "EDr up" (y) lights up. The LED DrIJ (v) that was on will blink until the end of the first song.Furthermore, by setting the terminal 8 (h) to the H level and rotating the rotary motor 9 (, i) of the mechanical drive system 7 in the upward direction, the elevation will be increased. The operation is started.At this time, the rotating member 8 rotates and the completion detection switch 43 (o> is turned off).

The rotating member 8 continues to rotate, and the ascent completion detection switch 42 (
f) is turned on (time tIQ), the terminal 9(i) becomes 1 level, the rotary motor 9(j) stops, and the elevation-up operation is completed.At the same time, the terminals 26 and 2
8 becomes the L level, the mechanical drive system 7 operates, and the pickup arm 5 moves at high speed toward the outer circumference toward the first song. Pickup arm 5 plays the first song all (30c
m descending position) and reaches a point (outside the outer edge of the disc) 4 addresses from the registered address of the first song (time T n ), the terminal 26 of the system controller 51
is at H level, terminal 27 is at L level, and terminal 28 is at H level, and DD drive system 19 reverses the drive direction and moves pickup arm 5 toward the first song at low speed.

Then, from time t12 when the set address of the first song is reached, the performance of the first song begins through the same process as the performance of the third song. However, for the first song, the band servo is not performed at the registered address, but it is vertically lowered without band servo at a preset lowering position address corresponding to each disc size.

Similarly to the case of the third song, when the end of the performance of the first song is detected, the elevation up operation is completed at time t13). Since all the programs have been completed, at the time tM when the upper 4 completion detection switch 42 is turned on, the terminal 8 of the system controller 51 is at H level.

The terminal 9 is kept at L level, and the rotation 33-mo 99 of the mechanical drive system 7 continues to rotate in the lead-out direction.Using this as a driving source, the pickup arm 5 moves at high speed toward the rest (auto return). 〉.Turntable 3 at the same time
rotation also stops. When the big lub arm 5 reaches the rest position and the rest position detection switch 44 is turned on [15], the terminal 9 of the system controller 51 becomes H level, the rotary motor 9 of the mechanical drive system 7 stops, and the pickup arm 5 enters a special state at the rest position and ends the program performance.

Next, the operation during performance by manual operation will be explained based on the timing charts of FIGS. 21A and 21B. It is assumed that the loading section is initially in the closed state, and when the "open/close" key is turned on at time t1, the terminal 6 of the system controller 51 goes to the L level, the loading motor 60 begins to rotate in the open direction, and the slide base 4 protrudes toward the front as shown in Figure 1(b). When the open operation continues and the slide base 4 turns on the open detection switch 6434-(e) at time 2, the terminal 6 of the system controller 51 transitions to H level, the loading motor 60 is stopped, and the open operation is completed. do. If the open detection switch 6
If 4 is not turned on, the motor automatically stops and waits at position A ()1-LE SAFE).

Place the disc on the turntable 3, and at time t3,
When the "Arm Manual Set" key is turned on, the terminal 19(t) of the system controller 51 goes to L level.
In response to this, the terminal 8(j) becomes a level, the rotary motor 9(1) of the mechanical drive system 7 starts rotating in the lead-in direction, and the pickup arm 5 starts lead-in. At this time, the terminal 4(c) of the system controller 0-51 also becomes L level, causing the phono motor 55 to rotate. After that, the pickup arm 5 continues the lead-in in the same way as the automatic lead-in during program play, and the DDDi sensor 34
When the output (Q) is generated [at 4, the terminals 26 (+a) and 28 (o) of the system controller 51 each become L level and 1] E) The drive system 19 is operated,
The drive system is switched from the mechanical drive system 7 to the DD drive system 19.

The mechanical drive system 7 precedes the Di) drive system 19 and stands by just before the elevation down operation. Pickup arm 5 continues lead-in at high speed, and address A sensor 32
At time t5 when the rising edge of, for example, the 103rd pulse of the output (r) of a, is input to the terminal 12 of the system controller 51, the terminal 26 (m) becomes the t] level, and the moving speed of the pickup arm 5 becomes low.

The pickup arm 5 continues the lead-in at a low speed, and the address Δ sensor 32 corresponding to the 30 CIll lowering position is detected.
For example, at time t6 of the rising edge of the 105th pulse of a,
The terminal 28 (0'') of the system controller 51 becomes H level, the DD drive system 19 stops, and the pickup arm 5 stops in an elevated state, entering the standby state for manual performance.Next, press the "elevation" button. When you turn on
Terminal 8(j) of system controller 51 becomes L level, rotary motor 9(1) of mechanical drive system 7 rotates in the down direction, and starts an elevation down operation. At this time, the LED that had been lit until then turned up.'' (W)
goes out. When the cam portion 8a of the rotating member 8 of the mechanical drive system 7 turns on the descent completion detection switch 43 (i>) and completes the down operation (time t8), the system controller 51
Terminal 9(k) becomes L level, and mechanical drive system 7 stops. At this time, the mute signal (b) which had been output from the terminal 2 at the same time disappears and becomes L level), the muting relay 88 is turned off, and a performance state is entered.

During the performance, if the "start" key is held down at time t9, the position will shift to the locate-in operation. First, at time point 19, terminal 8 (j) of the system controller 51 becomes the [] level,
The rotary motor 9(1) of the mechanical drive system 7 rotates in the upward direction and enters an elevation up operation. LED at the same time
``R START'' (V) and ``UP'' (W) are lit, and an H level mute signal (b) is output from terminal 2, turning on the muting relay 88 and interrupting the performance.

37- When the ascent completion detection switch 42 (h) is turned on (at time t
+o) N End of system controller 51 f9(k
) reaches the ['' level, and the rotation motor 9 of the mechanical drive system 7 (
1) to stop and reach the rising completion state, then terminal 27 (
n) goes to the L level, the DD drive system 19 is operated, and the pickup arm 5 is moved in the inner circumferential direction at low speed to perform a locate operation.

The LED ``Start'' (V) flashes while the ``Start'' key is held down from the time t+o when the locate operation begins. Press and hold the "Start" key.
At time tIi (time t11), the terminal 27 (n) of the system input terminal [1-RA 51 becomes H level and the DD drive system 19
Since the pickup arm 5 stops, the pickup arm 5 stops in the raised state, and at the same time, the LED r stars 1 to 1 stop blinking. Then, when you turn on the "elevation" key (point j
+2>, the performance state is entered at time point [13] through an elevation down operation in the same manner as in the case of manual lead-in.

When performing a locate operation, press and hold the Stop 1 key to start the elevation up operation.
) becomes L level, and the pickup arm 5 moves toward the outer circumference at low speed (locate out). In addition, regardless of whether the pickup arm 5 is in the up or down state, if the pickup arm 5 exceeds the DD drive range, the mechanical drive system 7 operates to automatically return the pickup arm 5 to the rest position (
forced return). This forced return is not limited to the case where the DD drive range is exceeded, but the range can be arbitrarily set and it can be performed when the range is exceeded.

When the performance continues and the needle tip 48 reaches the vicinity of the lead-out groove, the output (p) of the end area sensor 35 is input to the terminal 10 of the system controller 51 at the level, and the output (r) of the address A2 address sensor 2a, 32b is ), (s), end detection is performed when the needle tip 48 enters the lead-out groove and the feeding speed increases. At the point when the end is detected, the terminal 8 (j) of the system controller 51 becomes H level, while the terminal 9 remains at L level, and the elevation up operation is started. At this time, the LED "r UP" (W) lights up, and the mute signal (b) is output, turning on the muting relay 88 and cutting off the audio signal system. At the time t when the ascent completion r detection switch 42 (h) is turned on
+s), even if the up operation is completed, the logic at terminals 8 and 9 of the system controller 51 is maintained, and the mechanical drive system 7
As a result, the pickup arm 5 starts auto-returning in the rest direction. Bic) 7 At the time t16 when the knob arm 5 returns to the rest position, the rest position detection switch 44 is activated.
(a> is turned on and a predetermined time has elapsed from midwifery t16 [at 17, the terminal 9(k) of the system controller 51 becomes H level, stopping the mechanical drive system 7 and completing the auto-return.At this time, at the same time System controller 51
The terminal 4<C) becomes H level and the phono motor 55 is stopped.

When the [Open/Close] key is turned on at time t18, the terminal 7 (g) of the system controller 51 becomes L level, and in response, the rope ink motor 60 rotates in the closing direction, causing the slide base 4 to move. It is driven to be stored inside the main body. When the storage is completed and the slide base turns on the close detection switch 63 (d) (at the time j + s >), the system controller 51 responds by setting the terminal 7 (g) to the I'' level and turning the O-ding motor 60 on. It is stopped, the closing is completed, and all operations are in a standby state.

When performing so-called de-syncing, which automatically records the playback sound on a tape deck (not shown) during program play and manual play, first connect the remote pause terminal of the tape deck to the synchro output terminal 62 (11th (shown in the figure), put the deck in recording pause, and turn on the synchronization switch 61 of the system.

From the terminal 25 of the system controller 51, when one gram is played, as shown in FIG.
And at t14, an L level synchronized output (1> is generated. Since the deck repeats pause-recording every time one pulse is input to the pause input, the pause is released only during performance, and only the playback sound can be automatically recorded. - At the center of the Nicol performance, the time points ty, t+o, L12 and t
A synchro output (U) is generated at +s, and the recording state is automatically entered only during performance.

In the above embodiment, a case where the present invention is applied to A, L, J-, and T-arms has been described, but the present invention can also be applied to a linear tracking arm.

As described in detail above, in the present invention, when a pickup arm equipped with an address sensor and a song interval sensor that detect the arm position performs a lead-in operation, the address sensor searches for an interval based on the output of the song interval sensor. The addresses are set based on the output of the disc and the track intervals are registered, and the registered addresses between the outermost tracks are compared with the reset date set for each disc size. The disk size is determined automatically and reliably during lead-in operation.
Become.

[Brief explanation of drawings]

42- Fig. 1 is a schematic perspective view showing the record player according to the present invention, (a) shows the closed state, (b) shows the oven state, and Fig. 2 is a plan view showing the operating area of the pickup arm. 3 and 4 are a schematic plan view showing the drive mechanism of the pickup arm and a perspective view of each part before assembly, FIG. 5 is a plan view showing the positional relationship between the pickup plate and a part of the address sensor, and FIG. 6 7 is a schematic perspective view showing the pickup arm assembly, FIG. 7 is a schematic perspective view showing the head shell part, FIG. 8 is a diagram showing the positional relationship between the song gap sensor and the song gap, and FIG. 9 is the song gap between songs. A diagram showing the output characteristics of the sensor, FIG. 10 is a block diagram showing an example of a control section, FIG. 11 is a circuit diagram showing a specific example of a part of FIG. 10,
Figure 12 is a circuit diagram showing a specific example of a part of the inter-song sensor;
Figure 3 is a waveform diagram of each part in Figure 12, Figure 14 is the DO
FIG. 15 is a circuit diagram showing a specific example of the drive system 19, FIG. 15 is a diagram showing the relationship between songs and band servo signals in band servo, FIG. 16 is a circuit diagram showing a specific example of a part of the address sensor, and FIG. The figure is a timing chart diagram showing the output of each sensor in Figure 16, Figures 18A and E3 are timing chart diagrams for explaining the operation during program performance, and Figure 19 is a timing chart diagram showing the output of each sensor in Figure 16.
The figure is a flowchart for explaining the operation of υ size determination, and FIG. 20 is a flow chart for explaining the operation of detecting between songs.
- Chart diagrams, Figures 21A and 8 are timing chart diagrams for explaining the operation of the manual performance 14. 7...Mechanical drive system 8...Rotating part 9...Rotating motor 11...Latch mechanism 19...DD
Drive system 20...7 magnets 25a, 25b...drive coil 26...
・Speed detection coil 27...Pickup plate 32a, b...
... Address A, B sensor 34 ... DD area sensor 35 ... End area sensor 42 ...
・Ascent completion detection switch 43...Descent completion detection switch 46...Song interval sensor 51...System controller 53...
・Address sensor part 60... Loading motor 70... Sensitivity changeover switch 71, 77, 78... Seven switch means...
... Drive voltage generation circuit 80 ... Cancellation coil 87 ... Muting circuit Applicant Pioneer Corporation Agent Patent attorney Motohiko Fujimura 45-

Claims (1)

[Claims] During the lead-in operation of a pickup arm equipped with an address center for detecting the arm position and a song spacing sensor, the pickup arm reaches between songs based on the output of the song spacing sensor and reads the address based on the output of the address sensor. A disc characterized in that the disc size is determined by setting and registering the track spacing, and comparing the registered address between the outermost discs and a size determination address set corresponding to each disc size. How to determine size.