JPS58122655A - Intermusic detection method in record player - Google Patents

Abstract

PURPOSE:To detect the intermusic accurately, by restarting the music selection with a pickup arm returned to the outermost circumference, when the intermusic of a registered address is not found out at the music selection and if it is not found out yet at the search of an address apart from a prescribed address. CONSTITUTION:The pickup arm 5 at a rest position A is started by designating a music with a CPU (not shown). The arm 5 is mechanically driven 7 until the position C, and is driven by an electromagnetic force DD from a position D to a B. At the DD drive, a photocoupler at the tip of the arm 5 is operated, and at every time when the intermusic is detected, the address sensor interlocked with the arm 5 is stored in the CPU with an address and the arm 5 is turned to the outermost circumference of a disc. Then, the arm 5 is DD-driven toward the D direction, and if no address is found out regardless of the search of a designated address and if an address apart from a prescibed address is not found out regardless of the 2nd search, the arm is returned to the outermost circumference and the selection of music is restarted. Thus, the intermusic is detected surely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting intervals between songs, and more particularly to a method for detecting intervals between songs in a record player capable of program play.

The purpose of this invention is to provide a method for detecting intervals between songs that can reliably detect specified intervals between songs.

The song interval detection method according to the present invention includes a pickup equipped with an address sensor for detecting the arm position and a song interval sensor, and when the arm is in lead-in operation, the song interval is searched based on the output of the song interval sensor, and the address sensor is activated. The address is set based on the output and the song interval is registered, and during song selection operation, the vicinity of the specified address is detected by an address search based on the output of the address sensor, and from the point of detection, the song interval is determined based on the output of the song interval sensor. If the specified address is not found, it is further searched for an address that is a running address away from the specified address, and if it is still not found, the pickup arm is moved toward the outer circumference and the same song selection operation is repeated at least once. I have to.

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

FIG. 1 is a schematic perspective view showing a record player according to the present invention, in which (a) is a closed state;
(b) shows an 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. That is, the open/
By pressing the close key 2a, the slide base 4 on which the turntable 3 is mounted moves forward and protrudes to the front of the main body (open state).In this open state, after placing the disc on the turntable 3, the slide base 4 is opened again.
By pressing the close key 2a, the slide base 4 is moved back to the closed state and a disc is set. Also closed condition! It(a) allows full automatic performance by program selection, and is open to 11! In (b), performance can be performed manually. Although a door to be provided on the front side of the main body is not shown, the door also performs opening/closing operations in conjunction with the slide base 4 during opening/closing operations.

The pickup arm 5 is located at the rear end of the slide base 4 in order to reduce the width of the slide base 4 and to facilitate setting of the disc on the turntable 3, and this position is used as a rest position. This pickup arm 5 has an area X shown in FIG.
It performs a lead-in operation by rotating in the opposite direction, and after reaching a position slightly outside the outer edge of the 30cm LP disc, it rotates downward toward the pre-specified song interval. . The pickup arm 5 rotates from rest position A to position B using two drive systems: a first drive system (hereinafter referred to as a mechanical drive system) that mechanically drives the pickup arm 5; It is selectively driven by a second drive system (hereinafter referred to as DD drive system) that is directly driven by electromagnetic force.

An arm stopper 18 is provided on the player housing side, and an arm stopper 48 is provided on the slide base 4 side, and when the slide base 4 is stored in the housing, the pickup arm 5 is in contact with the arm stopper 18. (rest in).

At this time, since a spring 30 is interposed between the pickup plate 27 and the magnet holder 28 as will be described later (in FIG. 3), the bottle member is fixed to the pickup plate 27 and driven by the mechanical drive system 7. 12 resists the biasing force of the spring 30 and 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 48. 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 and a perspective view of each part before assembly, showing the drive mechanism of the pickup arm. Third
In the figures and FIG. 4, the mechanical drive system 7 includes a rotary member 8 that has gears on its outer periphery and is rotatable and coaxially or concentrically with the rotation center axis of the pickup arm 5, and a rotary motor that is a drive source. 9, a power transmission section 10 which is a combination of gears and transmits the driving force of the rotary motor 9 to the rotary member 8, and a latch mechanism 11 provided on the rotary member 8,
The latch mechanism 11 selectively engages the bin member 12 that is interlocked with the pickup arm 5 in accordance with the rotation of the rotating member 8, thereby moving the pickup arm 5 from the rest position A to the position 0 near the center of the disc for the first rotation. Drive within the range of motion. The latch mechanism 11 includes a swinging arm "1" that is swingably supported by a pin 13 provided on the rotating member 8.
4, a guide hole 16 formed in the rotating member 8 to guide the guide bin 15 provided integrally with the swinging arm 14, and an engagement that allows the swinging arm 14 to engage with the aforementioned bin member 12. a spring member 17 that engages the swinging arm 14 to position it in the engaged position P or the non-engaged position Q; and a gripping member provided on the rotating member 8 when the swinging arm 14 is in the engaged position P. 18 to grip the bottle member 12, the pickup arm 5 is rotated in accordance with the rotation of the rotating member 8, and the pickup arm 5 is positioned *
When the position C is reached, the pickup arm 5 is reversed to the non-engaging position Q and disengaged from the pin member 12, thereby stopping the drive of the pickup arm 5.

On the other hand, the DD drive system 19 includes, for example, a movable magnet provided on the pickup arm side and a fixed coil provided on the arm stand side.
The pickup arm 5 is driven in the second rotation range to position B slightly outside the outer edge of the 0co+LP disc. The movable magnet 20 is attached to the bearing 2 of the arm stand 21.
It is fixed to a rotating shaft (not shown) of a pickup arm 5 rotatably held by a yoke 23 so as to face a yoke 23 at a predetermined distance from each other, and has different magnetic poles in the circumferential direction. and are magnetized in the thickness direction so as to be arranged alternately in correspondence with the speed detection coils. 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 the board 24 cooperates with the magnet 20 to rotate the pickup arm 5 by electromagnetic force. A pair of drive coils 25a, 25b and a speed detection coil 26 for detecting the rotational speed of the pickup 7-me 5 are fixed. The pair of drive coils 25a and 25b are arranged at approximately 180 degrees around the central axis of rotation of the pickup arm 5, and the speed detection coil 26 is connected to the drive coils 25a and 25b.
5b in a positional relationship of approximately 90 degrees. The pickup arm 5 is attached to the drive coils 25a and 25b at position D (
When the position C is reached, a drive current is supplied from the horizontal drive circuit (described later), and when the position C is reached, the drive system is switched from the mechanical drive system 7 to the DD drive system 19, and the second rotation range is reached. The DD drive system 19 is driven at (position D to position), 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 of the pickup arm 5. In order to ensure the switching from the mechanical drive system 7 to the DD drive system 19, an overlap portion (positions D to C) is provided in the first and second rotation ranges.

For example, a pickup arm 5 is located below the magnet 20.
A pickup plate 27 is provided to be rotatable about the rotation axis of the magnet holder 2 through a long hole 27a formed in the pickup plate 27.
The pickup arm 5 is
It is attached to the magnet holder 28 so that its position can be adjusted in a horizontal plane with respect to the pickup arm 5, and rotates together with the pickup arm 5. A spring 30 is interposed between the pickup plate 27 and the magnet holder 28, and the aforementioned bottle member 12 is fixed to the pickup plate 27.

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 pickup plate is in the rotation range (positions D to B in FIG. 3). The Δ and B sensors 32a and 32b are used to constantly monitor the needle tip position of the pickup arm 5 in accordance with the address, and the address B sensor is 90' ahead of the address A sensor in phase. Furthermore, pickup plate 2
DD1 rear sensor +: located on the rotation locus of the shutter part 33 of 7 and detects the DD area of the pickup arm 5 (place ID-B in Figure 3): end that detects j-34 and 1st rear An area sensor 35 is provided.

The output of the DD area sensor υ-34 is used to switch from the mechanical drive system 7 to the DD drive system 19 during lead-in operation. The output of the end area sensor 35 allows full automatic performance of program performance 1.

To enable end detection based on each output of address A, l, B, and υ- during manual performance. These sensors 32a, 32b, 34, and 35 consist of light-emitting and light-receiving elements buttoned to face each other with the pickup plate 27 in between, and are housed in a holder 36 attached to the arm stand 21 as shown in FIG. .

In FIGS. 3 and 4, the rotating member 8 of the mechanical drive system 7
Above is the elevation shaft 37 of the pickup arm 5.
is provided. One end of an elevation shaft 38 held movably up and down by the arm stand 21 is in contact with the elevation cam 37, and the other end of the elevation shaft 38 is attached to a elvage plate 39 that supports the pickup arm 5. Fixed. A spring 50 is interposed between the arm stand 21 and one end of the elevation shaft 38 to urge the elevation shaft 38 downward. Mechanical chassis 4 equipped with mechanical drive system 7
1, there are switches 42 and 43 for detecting the completion of raising and lowering of the pickup arm 5 due to the elevation operation, and a switch 44 for detecting the rest position of the pickup arm 5 (position A in FIG. 3). is provided. These switches are installed on the outer periphery of the rotating member 38.
It operates by being pressed by the cam portion 8a that is pressed. The upper needle completion detection switch 42 also serves to detect the position immediately before the pickup arm 5 starts descending due to the elevation operation during the lead-in operation.

That is, during the lead-in operation, the pickup arm 5
The mechanical drive system 7, which precedes the rotation of the pickup arm 5 by the DD drive system 19 in the second rotation range after the drive operation of They are placed on standby just before the final step. The rotating member 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 a desired song interval.

FIG. 6 shows a schematic perspective view of a pickup arm assembly including the aforementioned DD drive system 19 and pick door knob plate 27, and the head shell 45 attached to the tip of the pickup arm 5 has a sound groove on a record A song interval sensor 46 is provided at its tip for distinguishing between a song gap and a sound groove by utilizing the difference in reflectivity between songs. As shown in FIG. 7, the song interval sensor 46 uses a single light emitting element 49 such as a light emitting diode located in a vertical plane including the tip 48 of the cartridge 47 as a common light source.
It is composed of this light emitting element 49 and two light receiving elements 50a and 50b, such as phototransistors, which 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 48. 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.
And output as shown in (b) is generated, and the cartridge 47
When the needle tip 48 of is located above the center of the song, the output (a
) and (b) have the relationship shown in FIG. 9 with respect to the center of the song.

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 figure and FIG. 11, 51 is a system controller that centrally controls all of the blocks,
For example, it consists of a 4-bit microcomputer. The system controller 51 receives various command signals from the operation section 2, signals indicating the operating state of the system from the switch section 52, address signals from the 1st address sensor part 53, and inter-song signals from the song-interval sensor part 54. etc. 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 unit 2 is provided with all the operation keys for selecting a program, command keys for instructing various operations, and light emitting diodes for displaying the operations of these keys. The arm drive unit 56 is an interface that drives the arm drive motor (rotary motor) 9 of the mechanical drive system 7 in response to the IIJil signal from the system controller 51 and the output signal of the lowering/incomplete detection switch 43. The loading drive unit 57 responds to a control signal from the system controller 51 and the slide base 4 (first
This is an interface that drives the loading motor 60 for moving the robot. detsuxincro circuit 58
is an interface circuit for sending a recording synchronization signal to a tape deck (not shown) that is selectively connected in response to a control signal from the system controller 51 when the synchronization 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 recording pause state is set and the synchro switch 61 is turned on,
This is a function in which the deck is in a recording state while the player is playing, and the deck is in a pause state when the player is in an elevated state or while the arm is moving.The deck pauses every time one pulse is input to the pause terminal. recording(
(pause release) is repeated. The switch unit 52 includes switches 42 and 44 for detecting the completion of raising the pickup arm 5 and the rest position.
Switches 63 and 64 are also provided for detecting the closed state and oven state of the player body.

FIG. 12 is a circuit diagram showing a specific example of the inter-song sensor part 54 in FIG. 10. In this figure, the inter-track sensor 4
6 consists of a single light emitting element 49 and two light receiving elements 50a and 5ob as explained in FIG.
a and 50b each receive reflected light from the disk 6 and generate an output in accordance with the received light. 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 one sensor output 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) is between songs, (b) is an introductory groove, (c) is
indicate the lead-out grooves, respectively.

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 the operational amplifier OP4 which constitutes the inter-song comparator 68 and the operational amplifier OPs which constitutes the zero-cross comparator 69. operational amplifier OP
A reference level VT is applied to the inverting input terminal of 4, and the reference level VT)-1 changes according to the sensitivity selection by the sensitivity selector switch 70, and even if the sensitivity is the same, the pickup arm 5 is moved up. , also changes depending on the down operation.

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 up and down times, it is possible to reliably distinguish between song intervals and tone grooves by changing the reference level VTH. The reference level VTI-1 is switched by turning the switch means 71 on and off in accordance with the rubation operation of the pickup arm 5. The output J of the operational amplifier OP4 is input to the system controller 51 (terminal 15 in FIG. 11) as an inter-music signal.

The AC amplifier circuit 67 cuts DC from one sensor output of the amplifier circuit 65 with a capacitor CO, and connects the operational amplifier OP.
After being AC amplified in step 6, the signal is supplied to the non-inverting input terminal of operational amplifier OP7 constituting search comparator 90. In the zero cross comparator 69, the operational amplifier OPs has the fixed reference voltage B2 as an inverting input, and the differential amplifier circuit 6
The zero-cross point of the differential signal from 6 is detected and the zero-cross signal is output. On the other hand, the search comparator 90
The operational amplifier OP7 has the same reference level VTH as the operational amplifier OPa as an inverting input, and upon receiving the signal from the AC amplifier circuit 67, outputs a signal which is cut off from the reference level VTHH as an inter-song registration permission signal. The zero-crossing signal and the song interval registration permission signal are input to the gate circuit 72, and based on the Micoat signal output from the system controller 51 (terminal 2 in FIG. 11), the zero-crossing signal is turned up when the pickup arm 5 is down. At this time, the song interval registration permission signal is sent to the system controller 51 (terminal 14 in Figure 11).
is input. In the system controller 51,
The center of a song interval during a performance is detected based on the zero-cross signal and the song signal.

Incidentally, the above-mentioned on/off operation of the switch means 71 is performed based on the above-mentioned mute 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 OPs, and an inverter 76 made up of the operational amplifier OPs with a gain of 1.The inverting input terminal of the operational amplifier OPa is connected to a part of the track sensor 5.
The band servo signal from the speed detecting coil 26 is amplified by the amplifier circuit 74 at the non-inverting input end, and the difference with respect to the reference voltage between the two is amplified to drive the drive coils 25a, 25b. By supplying current to the pickup arm 5, the pickup arm 5 is driven while controlling the speed.

The band-car signal and the speed servo signal are each supplied to the differential amplifier 75 as necessary by switch means 77 and 78 which are turned on and off according to control from the system controller 51. The amplifier circuit 74 is an operational amplifier OP.
+o, which amplifies the minute amount of power generated by the speed detection coil 26 according to the rotational speed of the pickup arm 5 and outputs it to the horizontal drive circuit 73 as a speed servo signal. In the amplifier circuit 74, VR+ is a polygon for offset adjustment.

Here, to explain the band servo operation, the differential output of the differential amplifier circuit 66 in the 1° track interval sensor part 54 is as follows.
As explained based on FIG. 13(b), the figure-8 curve characteristic as shown in FIG. 15 is exhibited between songs, and this differential output becomes a band servo signal. Assuming that the needle tip 48 has now moved to the outer circumference by x [l] 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.
The needle tip 48 moves in the inner circumferential direction until it is located above the center of the song interval. Controlling the needle tip 48 in this way so that it is always positioned above the center of the song 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 the corresponding program play, the drive voltage generated by the drive voltage generation circuit 79 (FIG. 11) is The reference signal is applied to the inverting input terminal of the operational amplifier OPs, and is outputted from the terminals 26, 27 and 28 of the system controller 51 in the drive voltage generation circuit 79, based on the control signal indicating high-speed, inner circumferential direction and outer circumferential direction driving. The moving speed and direction of the pickup arm 5 can be controlled by changing the value and polarity of the drive 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 cancels the noise component generated by the drive coils 25a and 25b, thereby reducing the output S of the speed detection coil 26.
/N to improve the stability of the speed servo. That is, when a 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. By providing it in series with the speed detection coil 26, 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 four phototransistors arranged opposite to these light emitting diodes. Light receiving section 53
B and address A, B sensor 32a, 32b, D
A DI rear sensor 34 and an end area sensor 35 are configured, and a pickup plate 27 interlocked with the pickup arm 5 rotates through the gap between the light emitting section 53A and the light receiving section 53B. Each output from the light receiving section 53B is waveform-shaped by inverters 82 to 85 constituting a waveform shaping circuit 81, and is outputted to the disk 6 at the timing shown in FIG. 17 during the lead-in operation of the pickup arm 5.

The end area signal (a) is applied to the terminal 10 of the system controller 51, the address signal (b) is applied to the terminal 12, the address B signal (c) is applied to the terminal 13, and the DD area signal (d') is applied to the terminal 11. be done. The role of each sensor is as explained in FIG.

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

First, the operation when playing a program by specifying the third song → first song on the 30CILP disc 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 a program, after turning on the power at a certain point, turn on the music selection key "3" on the operation section 2, and the light emitting diode (hereinafter abbreviated as LED) r3J
<u) seems to light up, but it actually flashes once and then lights up)
, indicating that the third song has been programmed. Next, the song selection key “
1", the LED Ml (v) lights up in the same way. If you make a mistake in setting the program, turning on the stop key will clear the program, so you can set it again. After completing the program setting, when the start key is turned on at time point [2], the terminal 8 (h) of the system controller 51 becomes L level, and the rotary motor 9 (j) of the mechanical drive system 7 starts rotating in the arm lead-in direction. , start auto lead-in. At this time the LED
r start" (W) lights up to indicate the start of auto lead-in, and at the same time, the rest position detection switch 44 (a
) is reversed.

Pickup arm 5 continues lead-in, sword tip 48
At the time t3 when the DO area sensor 34 reaches the vicinity of the center spindle (near the center of the disk), the output (0) of the DO area sensor 34 is inputted to the terminal 11 of the system controller 51 at H level, and in response, the output (0) of the DO area sensor 34 is inputted to the terminal 11 of the system controller 51, and in response, the output (0) of the DO area sensor 34 is inputted to the terminal 11 of the system controller 51. (m
) respectively go to L level, operating the DD drive system 19, and entering the DD drive range 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 is switched from the mechanical drive system 7 to the DD drive system 19. Even after the latch is released, the mechanical drive system 7 continues to operate in the lead-in direction ahead of the DD drive system 19,
The cam portion 8a of the rotating member 8 turns the one-row completion detection switch 42 to A, and the output (f) of this switch 42 is inputted to the terminal 39 at the H level, and in response, the terminal 8<h) becomes H.
level.

Terminal 9(j) transitions to L level, rotating motor 9(j
) is reversed in the lead-out direction and terminals 8 (h) and 9 (j) are turned on again when the ascent completion detection switch 42 is turned on again.
becomes H level, the rotary motor (j) is stopped, and the ascent completion detection switch 42 is on standby.

While the high-speed lead-in operation by the DD drive system 19 continues, the system controller 51 receives pulse signals from the address A sensor 32a (p) and B sensor 32b (Q) input to the terminals 12 and 13 from time point 13. Address counting is started based on the number, and when a predetermined address is reached, a search for song interval registration is started from time t4. Then, when the pickup arm 5 is raised (during search), the song interval signal (D) is input to the terminal 14 from the song interval sensor part 54 and is input to the terminal 15 in response to the song registration permission signal D).
S) and register the addresses sequentially from between the songs on the innermost circumference of the disc. At time t5 when the pickup arm 5 reaches the search end address outside the outer edge of the 30CILP disc, a final disc size determination is performed.

The size is determined in advance as 17cm, 25cm and 30cm.
When searching, the value obtained by adding 3, for example, to the address □ indicating the drop position corresponding to the disc size, and the address of the last 0 recording (the outermost song) registered between songs, as shown in the flowchart of Fig. 19. This is done by comparing sequentially the final registration -
If the relationship of address ≦ descending position 1 address + 3 holds true, the actual disk size is determined from the descending position at that time. In addition, the address of the famous song near the last registered song registered between songs during the search is compared with the value of descending address -5 (5th address before the descending position) determined by size judgment, and the address of the famous song near the last registered song is compared. If the relationship ≧falling address -5 is established, then the song is not regarded as a song and is deleted, thereby making a registration correction.

After the size determination is completed, terminal 2 of the system controller 51
7 (+) goes to L level and terminal 28 (m) goes to H level (terminal 26 remains at L level), the driving direction of DD drive system 19 is reversed, and thereby 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) goes to L level, starts the phono motor 55, and rotates the turntable 3(e). Also, the LED r3J (u) that was in the lit state
repeats blinking from time t5 until the performance of the third song ends. To explain the inter-track detection operation according to the flowchart of FIG. 20, when the needle tip 48 of the pickup arm 5, which is moving at high speed in the inward direction of the disc, arrives at, for example, address 4 (registered address + 4) before the registered address of the third track. (Time point [8
), the terminal (k) becomes H level, and the moving speed of the arm becomes low. Then, in the low-speed driving state, when the song interval is detected from before the third song and the song interval signal (S) from the song interval sensor part 54 is input to the terminal 15, the system controller 51 detects the rising edge of the pulse. (At time (7), set the terminal 27 (+) to H level to stop the DD drive system 19, and turn off the LEDs "r start" (W) and "up" (y) that were lit up until then. .

At the same time, the terminal 8(h) is set to the L 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, the terminal 3(c) also goes to the L level, and the collector of the transistor Q2 (shown in Figure 11) goes to the H level, thereby making the switch means 77 (shown in Figure 10.14) conductive and turning on the band servo. The pickup arm 5 is actuated by the DD drive system 19 in response to the band servo signal (differential signal of the outputs of the two inter-track sensors) from the inter-track sensor part 54.
is driven in a horizontal plane. With this band servo, even if there is eccentricity of the disc, it is possible to follow the deviation between tracks as the disc rotates, and lower the needle tip 48 of the pickup arm 5 to position it at the center of the track.

The elevation down operation continues, and at time t8, the cam portion 8a (shown in the third diagram) of the rotating member 8 turns on the descent completion detection switch 43, and when its output (a) becomes L level, terminal 9 (1) also becomes L level. 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. Furthermore, the mute signal (b) output from terminal 2 disappears and becomes L level) The output of buffer 86 also becomes L level, and transistor Q3 forming muting circuit 87
By turning off, the micoating relay 88 is turned off and the playing state is entered.

Due to the transition of the mute signal (b) to the level, the transistor Q4 in the inter-song sensor part 54 (see FIG. 12)
is turned off, the switch means 71 becomes conductive, and the operational amplifier OP4. By switching the reference level VTH of OP7, the sensitivity up/down switching of the inter-song sensor part 54 is turned down. Further, due to the transition of the mute signal (d) to the L level, the outputs of the eight buffers also go to the L level, causing the switch means 78 (shown in Figure 10.14) to become non-conducting, thereby causing the speed detection coil 26 in the DD drive system 19 to go to the horizontal drive circuit. The speed servo signal to 73 is cut off to turn off the speed servo. At the same time, the output of the buffer 89 becomes 1-level, so that the resistance R+ in the drive voltage generation circuit 79 (shown in FIG. 11) increases.

DD drive system 19 through R2, R3 and diode D1
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.

During song interval detection, if the song interval is not found, the search is performed 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 to shift to an elevation down operation as described above. If the song interval is not found even after searching the back of address 1, the pickup arm 5 is moved toward the outer circumference at high speed, and when it reaches the address (registered address + 4), the direction of movement of the pickup arm 5 is reversed. The song interval detection operation similar to that described above is repeated by moving in the inner circumferential direction at a low speed. If a song interval cannot be detected even after performing such a song interval detection operation a fixed 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, when the address 2 comes before the registered address of the fourth song, the system controller 51 enters a special state where the zero cross signal (r) and the signal between two songs (8) 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 a zero cross signal (r) after one positive pulse that is the inter-song signal (S) is input to the terminal 15) At the rising timing of , the system controller 51 detects that the needle tip has arrived between the third and fourth songs (time rs).When the end of the performance of the third song is detected [at 9, the H level signal from terminal 2 is detected. The muting signal (b) is output, and by turning on the transistor Q3, the muting relay 88 is turned on and cuts off the audio signal system.At the same time, the sensitivity of the inter-song sensor part 54 is switched up, and the DD drive system 19 Turn on the speed servo. At this time, the LED "r up" (y) lights up, and the lit LED rlJ (v) blinks until the end of the first song's performance. Further, by setting the terminal 8(h) to H level and rotating the rotary motor 9(j) of the mechanical drive system 7 in the upward direction, an elevation-up operation is started. At this time, the rotating member 8 rotates to turn off the descent completion detection switch 43 (a).

The rotating member 8 continues to rotate, and the ascent completion detection switch 42 (
f) is turned on (time t 10 ), N terminal 9(i)
becomes F level, the rotary motor 9(j) stops and the elevation up operation is completed, and at the same time as the completion, the terminals 26 and 28 become L level, the mechanical drive system 7 operates, and the pickup arm 5 moves towards the first song. Moves toward the outer circumference at high speed. Pickup arm 5 moves between the first song (30c-
When the disc reaches the point where it has passed the fourth address from the registered address of the first song (outside the outer edge of the disc) (time t n ), the terminal 26 of the system controller 51 goes to H level, the terminal 27 goes to L level, When the terminal 28 becomes H level, the DD drive system 19 reverses the drive direction and moves the pickup arm 5 toward the first song at low speed. Then, at the time when the set address of the first song is reached [12], the performance of the first song starts after going through the same process as when playing the third song. However, for the first song, the band servo is not performed at the registered address, but vertically descended without band servo at the preset drop position address corresponding to each disc size.

Similarly to the case of the third song, when the end of the first song is detected, the elevation is increased to 1jlf.
complete. Since all the programs have been completed, the terminal 8 of the system controller 51 is at the H level at time t+4 when the ascent completion detection switch 42 is turned on.

The terminal 9 is kept at the L level, the rotary motor 9 of the mechanical drive system 7 continues to rotate in the lead-out direction, and the pickup arm 5 moves at high speed in the rest direction using this as a driving source (auto return). At the same time, the rotation of the turntable 3 also stops. Time t I5 when the pickup arm 5 reaches the rest position and the rest position detection switch 44 is turned on.
Then, the terminal 9 of the system controller 51 becomes H level, the rotary motor 9 of the mechanical drive system 7 stops, the pickup arm 5 enters a standby state at the rest position, and the program performance ends.

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 D-ding section is initially in a closed state, and when the "open/close" key is turned on at time tl, the terminal 6 of the system controller 51 goes to the L level, and the loading motor 60 begins to rotate in the oven direction. , the slide base 4 protrudes toward the front as shown in FIG. 1(b). Continue the open operation and slide base 4
turns on the oven detection switch 64(e) at time t2, the terminal 6 of the system controller 51 changes to H level, the loading motor 60 is stopped, and the oven operation is completed. If a predetermined period of time e.g. 2
If the open detection switch 64 is not turned on even after 5 seconds have elapsed, the motor automatically stops and stands by on the spot (fail-safe).

Place the disc on turntable 3, and at point [3]
When the "Arm Manual Set" key is turned on, the terminal 19(t) of the system controller 51 goes to L level.
In response, the terminal 8(j) becomes L 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, terminal 4 (C) of the system controller 51 also [-
level and rotates the phono motor 55. Thereafter, the pickup arm 5 continues the lead-in in the same way as the automatic lead-in during program play, and at the time of occurrence of the output (q) of the D'D area sensor 34 [4], the terminals 26 (It) and 28 ( 0) respectively become L level to operate the DD drive system 19 and switch the L1 drive system from the mechanical drive system 7 to the DD drive system 19. The mechanical drive system 7 precedes the DD drive system 19 and stands by just before the elevation down operation. The pickup arm 5 continues the lead-in at high speed, and the output of the address A sensor 32a (r>, for example, the rising edge of the 103rd pulse is input to the terminal 12 of the system controller 51 at time t5.
Then, the terminal 26 (a+) becomes 1 level, and the moving speed of the pickup arm 5 becomes low.

The pickup arm 5 continues lead-in at a low speed, and the address A sensor 32 corresponding to the 30 CIll lowering position
For example, at the rising edge of the 105th pulse of a [6,
The terminal 28 (o) of the system controller 51 becomes H level, the DD drive system 19 stops, the pickup arm 5 stops in the raised state, and enters a standby state for manual performance. Next, turn on the "elevation" key,
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. Cam portion 8a of rotating member 8 of mechanical drive system 7
turns on the descent completion detection switch 43(i) and completes the down operation (at time (8), the terminal 9<k of the system controller 51 becomes L level, and the 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 locate-in operation will begin. First, at time t9, the terminal 8(j) of the system controller 51 becomes H level, the rotary motor 9(1) of the mechanical drive system 7 rotates in the upward direction, and enters the (2) elevation up operation. At the same time LED r
Start'' (V) and 1° up 1 (W) light up, and a 1 level mute signal (b) is output from terminal 2, turning on the micoating relay 88 and interrupting the performance.

When the ascent completion detection switch 42 (h) is turned on (time L
10), terminal 9 (k) of the system controller 51
) becomes H level, and the rotary motor 9 (1) of the mechanical drive system 7
) to complete the rising state, then terminal 27 (n
) becomes 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 time t10 when the locate operation begins. When you press and hold the "Start" key and release it at an arbitrary position, the terminal 27(n) of the system controller 51 becomes H level (tn), and the drive system 19 stops, so the pickup 77-mu 5 stops. It stops in the ascending state, and at the same time the LED "r start" stops blinking.

Then turn on the "elevation" key (point 1
+1>, the performance state is entered at time t13 through an elevation down operation in the same manner as in the case of manual lead-in.

When performing a locate operation, if you keep pressing the "stop" key, the terminal 28 (0) of the system controller 51 will go to L level after the elevation-up operation is completed, and the pickup arm 5 will move toward the outer circumference at low speed. (locate out). Furthermore, regardless of whether the pickup arm 5 is in the up or down state, if the pickup arm 5 exceeds the DO 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 comes near the lead-out groove, the output (p) of the end area sensor 35 is inputted to the terminal 10 of the system controller 51 at L level, and
Address sensor 2a, 32b (7) output (r), (s)
Based on this, when the needle tip 48 enters the lead-out groove and the feeding speed increases, end detection is performed. When the end is detected -
Then, the terminal 8(j) of the system controller 51 becomes H level (terminal 9 remains at L level), and the elevation up operation is started. At this time, LE, DR UP'' (W) lights up, a mute signal (b) is output, and the muting relay 88 is turned on to cut off the audio signal system. When the ascent completion detection switch 42 (h) is turned on at the time t + s >, the logic of the terminals 8 and 9 of the system controller 51 is maintained even when the up operation is completed.
The mechanical drive system 7 causes the pickup arm 5 to start auto-return in the rest direction. When the pickup arm 5 returns to the rest position (at 16, the rest position detection switch 44(a) is turned on, and at time t+7, a predetermined time has elapsed from time t16, the terminal 9(k) of the system controller 51 becomes H level. The mechanical drive system 7 is stopped and the auto return is completed. At this time, the terminal 4 (C) of the system controller 51 becomes H level and the phono motor 55 is stopped.

When the "Open/O-Z" key is turned on at time t18, the terminal 7 (g) of the system controller 51 goes to L level, and in response, the loading 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 storage is completed and the slide base turns on the close detection switch 63 (d) (at time t)
+s), in response to this, the system controller 51 sets the terminal 7(g) to H level, stops the loading motor 60, and the closing is completed, resulting in a special state for all operations.

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 (sync output terminal 62) of this system. 11 (shown in the figure), put the deck in the recording pause state, and turn on the synchronization switch 61 of the system.

From the terminal 25 of the system controller 51, as shown in FIG. 18B, when the program is played, the signals are transmitted at times t y , t 10 , t 12 and [5. An L level synchro output (1) is generated at the smell. Detsuki pauses every time one pulse enters the pause input.
In order to repeat the recording, the pause is released only when playing,
Only the playback sound can be recorded automatically. During manual performance, as shown in FIG. 21B, the time t y ,
Synchro output (U) is generated at j 10 , t 12 and t +5, and the recording state is automatically entered only during performance.

In the above embodiment, the case where the present invention is applied to an offset arm has been described, but the present invention can also be applied to a linear tracking arm.

As described above, in the present invention, during the lead-in operation of the pickup arm equipped with the address sensor and the song interval sensor that detect the arm position, the address sensor υ− is searched based on the output of the song interval sensor. The address is set based on the output of the sensor, and the song questions are registered. During song selection operation, the vicinity of the specified address is detected by an address search based on the output of the address sensor, and from the time of detection, the song interval is determined based on the output of the song interval sensor. If the song interval cannot be found, it further searches for an address a predetermined distance away from the specified address, and if it still cannot be found, move the pickup arm toward the outer circumference and repeat the same song selection operation at least once. Therefore, even if the specified song interval cannot be found in the song selection operation 111 due to eccentricity of the disc, adhesion of dust, etc., the specified song interval can be reliably detected by repeating the song selection operation.

[Brief explanation of drawings]

1 is a schematic perspective view showing a record player according to the present invention, in which (a) shows the closed state and (b) shows the open state, FIG. 2 is a plan view showing the operating area of the pickup arm, and FIG. 4 and 4 are a schematic plan view showing the drive mechanism of the pickup arm and a perspective view of each part before assembly,
5 is a plan view showing the positional relationship between the pickup plate and part of the address sensor; FIG. 6 is a schematic perspective view showing the pickup arm assembly; FIG. 7 is a schematic perspective view showing the head sill; The figure shows the positional relationship between the inter-song sensor and the inter-song interval, Fig. 9 is a diagram showing the output characteristics of the inter-song sensor between songs, Fig. 10 is a block diagram showing an example of the control section, and Fig. 11 is a diagram showing the output characteristics of the inter-song sensor between songs. FIG. 10 is a circuit diagram showing a specific example of a part of the inter-track sensor, FIG. 13 is a waveform diagram of each part in FIG. 12, and FIG. 14 is a D
A circuit diagram showing a specific example of the D drive system 19, FIG. 15 is a diagram showing the relationship between song intervals and band servo signals in band servo, FIG. 16 is a circuit diagram showing a specific example of a part of the address sensor,
FIG. 17 is a timing chart showing the outputs of each sensor in FIG. 16, FIGS. 18A and 8 are timing charts for explaining the operation during program performance, and FIG.
20 is a flowchart for explaining the operation of size determination, FIG. 20 is a flowchart for explaining the operation for detecting between songs, and FIGS. 21A and 21A are timing charts for explaining the operation during manual performance. It is. Explanation of symbols of main parts 2...Operation unit 5...Pickup arm 7...Mechanical drive system 8...Rotating member 9... Rotating motor 11-...Latch mechanism 19...DO
Drive system 20...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...O-ding motor 70...Sensitivity changeover switch 71.77.78...Switch means 79...
... Drive voltage generation circuit 80 ... Cancellation coil 87 ... Muting circuit Applicant Pioneer Co., Ltd. Agent Patent attorney Motohiko Emura

Claims (1)

[Claims] During lead-in operation of a pickup arm equipped with an address sensor for detecting arm position and a song interval sensor, an address is set based on the output of the address sensor while searching for a song interval based on the output of the song interval sensor. registering a song interval, and during a song selection operation, detecting the vicinity of the specified address by an address search based on the output of the address sensor, and searching for a song interval based on the output of the song interval sensor from the time of detection,
If the song interval cannot be found, search for an address further away from the specified address, and if it still cannot be found,
A method for detecting between songs, characterized in that after moving the pickup arm in the outer circumferential direction, the same song selection operation is repeated at least once.