JPS58122656A - Intermusic detection method in record player - Google Patents

Abstract

PURPOSE:To prevent the interruption of playing, by selecting the next music, when an intermusic registered with an address is not found out, and the intermusic is not found out regardless of the search of an address apart from a prescribed address, and further the intermusic is not yet found out regardless of repetitive music selection. CONSTITUTION:A 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 to the position C, and is driven by electromagnetic DD between positions B and D. A photocoupler at the tip of the arm 5 is activated, and at every time when the intermusic is detected, an address sensor interlocked with the arm 5 gives an address and it is stored in the CPU, and the arm 5 is turned to the outermost circumference of a disc. The arm 5 is DD-driven to the D. If the designated address is not found out, and it is not found out yet regardless of the address apart from a prescribed address again, and further if the address is not found out yet regardless of the execution of the music selection again from the outermost circumference, the next music is played. Thus, the interruption of the program playing is prevented.

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 is to provide a method for detecting intervals between songs that enables speedy program performance.

The song interval detection method according to the present invention includes a pickup 7-equipped with an address sensor for detecting the arm position and a song interval sensor.
During the lead-in operation of the program, the song interval is searched based on the output of the song interval sensor and the address is set based on the output of the address sensor to register the song interval, and during the song selection operation, the address is registered based on the output of the address sensor. The search detects the vicinity of the specified address, and if the interval between songs is not found, it further searches for an address a predetermined distance away from the specified address. If it is still not found, move the pickup arm toward the outer circumference and perform the same song selection operation. If the same song selection operation is repeated at least once and a predetermined number of times and no gap between songs is found, the process moves to the next program song selection operation.

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 in a closed state, (a) is in a closed state;
b) shows an open state. As shown in FIG. 1, a 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 open/cl button provided on the operation section 2 on the front of the main body
By pressing the ose key 2a, the turntable 3
The slide base 4 carrying the disc moves forward and protrudes to the front of the main body (in the oven state), and in this oven state, after placing the disc on the turntable 3, open/cl.
By pressing the ose key 2a, the slide base 4
is moved back to the closed state and the disc is set. Further, in the closed state (a), fully automatic performance by program selection is possible, and in the oven state (b), performance by manual operation is possible. Although the door to be provided on the front side of the main body is not shown, the door also opens and closes in conjunction with the slide base 4 during the A-brake/close operation.

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. As shown in FIG. 2, this pickup arm 5 has an area X as its performance area, and performs a lead-in operation by rotating both sides of the disc 6 from the rest position HA in a direction opposite to the tracing direction T during performance. , position B slightly outside the outer edge of the 30cm LP disc
After reaching this point, it rotates in the T direction toward a pre-specified song interval. The rotation range of the pickup arm 5 from the rest position to the position B is controlled by two drive systems: a first drive system (hereinafter referred to as a mechanical drive system) that mechanically drives the pickup arm 5, and a first drive system that mechanically drives the pickup arm 5; It is selectively driven by a second drive system (hereinafter referred to as the DD drive system) which directly drives the DD drive system by electromagnetic force.

An arm stopper 1a 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 1a. (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 pin 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 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 that is interlocked with the pickup arm 5 in accordance with the rotation of the rotating member 8, thereby resting the pickup arm 5. It is driven in a first rotation range from position A to position filIC near the center of the disk. The latch mechanism 11 includes a swing arm 14 that is pivotably supported by a pin 13 implanted in the rotating member 8, and a swing arm 14 that is integrally provided with the swing arm 14 to guide the idle pin 15. A guide hole 16 formed in the rotating member 8 is engaged with the swinging arm 14 in order to position the swinging arm 14 in the engagement position @P or non-engagement position Q where the swinging arm 14 can be engaged with the bottle portion 12 mentioned above. When the swing arm 14 is in the engagement position P, the rotating member 8
By gripping the bottle member 12 in cooperation with the gripping member 18 provided above, the pickup arm 5 is rotated in accordance with the rotation of the rotating member 8, and is disengaged when the pickup arm 5 reaches the position 11c. Flip to alignment position Q and insert bottle member 1
2, the drive of the pickup arm 5 is stopped.

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.
2nd to position B slightly outside the outer edge of the 0cmLP disc
The pickup arm 5 is driven within the rotation range.

The movable magnet 20 is attached to the bearing 22 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 the yoke 23 at a predetermined distance from each other. They are magnetized in the thickness direction so as to be arranged alternately in correspondence with the Daruma detection coils. On the other hand, a board 24 is attached to the 7-foot stand 21 so as to be located between the magnet 20 and the yoke 23, and the board 24 works 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 arm 5 are fixed. The pair of drive coils 25a and 25b are arranged at a positional relationship of approximately 180° around the rotation center axis of the pickup arm 5, and the speed detection coil 26 is connected to the drive coils 25a and 25a.
5b and approximately 90' positional relationship. The pickup arm 5 is located at the position U' of the drive coils 25a and 25b.
) (shown in the third figure), a drive current is supplied from the horizontal drive circuit described later, and at the point when 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 is started. In the movement range (position D to position B) 1] l) Drive system 19
At the same time, the output of the fast penetration detection coil 26 is fed back to the horizontal drive circuit to control the speed of the pickup arm 5. In addition, in order to reliably switch from the mechanical drive system 7 to the DD drive system 19, there is an overlap part (position D) in the first and second rotation ranges.
-C) is provided.

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 in a horizontal plane can be adjusted relative 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 3 consisting of a large number of slits 1 to enable address setting corresponding to the rotational position of the pickup arm 5.
1 is formed. Then, an address A sensor 32a and an address B sensor 3211 are provided so as to be located in the slit portion 31 of the pickup play 1-27 when the pickup arm 5 is in the second rotation range (positions D to B in FIG. 3). ing. 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. In the history, the DD1 rear of the pickup arm 5 is located on the rotation locus of the shutter part 33 of the pickup plate 27 (position D to
A DD area sensor 34 that detects B) and an end area sensor 35 that detects the end area are provided. 1] The output of the D area sensor 34 switches from the mechanical drive @7 during the lead-in operation to one DD drive system. The output of the end area sensor 35 allows full automatic performance of program performance 1.

To enable J-dot detection based on each output of address A2 address B sensor during manual performance. These sen+j
-32a, 32b, 34 and 35 are light-emitting and light-receiving elements disposed to face each other with the pickup plate 27 in between, and the arm stand 21 as shown in FIG.
It is housed in a holder 36 that can be attached to.

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 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 in contact with an elevation 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 Nilevagecon operation, and the rest position If of the pickup arm 5.
A switch 44 is provided for detecting (position A in FIG. 3). These switches are operated by being pressed by a cam portion 8a provided on the outer periphery of the rotating member 38. The ascent completion detection switch 42 is also used to detect the position just before the descent starts due to the elevation operation of the pickup arm 5, especially 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 The rotary member 8 of the mechanical drive system 7 moves the pickup arm 5 in response to a descending command issued when the pickup arm 5 reaches the desired distance l. Start rotating again to lower it.

FIG. 6 shows a schematic perspective view of the pickup arm assembly including the aforementioned DD drive system 19 and pick 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 reflectivity between the 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 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 eel that receives the light. 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 outputs an output according to the reflected light from the disk 6 based on the irradiated light from the light-emitting element 49. Occur. The light receiving elements 50a and 50b are respectively (a) in FIG.
) and (b), and when the stylus tip 48 of the cartridge 47 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 operating section 2, signals indicating the operating state of the system from the switch section 52, address signals from the 1st address sensor section 53, and inter-music signals from the song-interval sensor section 54. A signal etc. is applied. In response to these signals, the system controller 51 sends control signals to the DD drive system 19, deck synchronizer circuit 58, and the like.

The operation section 2 is provided with all the operation keys for program selection, command keys for commanding various operations, and light emitting diodes for displaying the operations of these keys. The arm drive unit 56 operates the arm drive motor (
This is an interface that drives the rotary motor (rotary motor) 9. The loading drive unit 57 is an interface that drives a loading motor 60 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 that puts the deck into a pause state when the player is in the up state or when the arm is moving, and the deck repeats pause-recording (pause release) every time one pulse is input to the pose terminal. There is. The switch section 52 is provided with switches 42 and 44 for detecting the completion of raising the pickup arm 5 and the rest position, as well as switches 63 and 64 for detecting the closed state and the open 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 5Qb as explained in FIG.
a and 50b each receive the reflected light from the disk 6 and generate an output according to the received light φ. 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 0P
A reference level VTH is applied to the inverting input terminal of 40, and the reference level VTH is applied according to the sensitivity selection by the sensitivity selector switch 70, and furthermore, even if the sensitivity is the same, it is applied according to the up and down movements of the pickup arm 5. However, it changes.

This is done so that even if the light-receiving elements 50a and 50b of the song-interval sensor 46 change between up and down times, by changing the reference level VTI-1, it is possible to reliably distinguish between song intervals and tone grooves. The switch means 71 is turned on and off in response to the operation of the pickup arm 5.
By turning it off, the reference level v'[H is switched. The output of the operational amplifier OP4 is sent to the system port 551 (terminal 15 in FIG. 11) as an inter-music signal.

The AC amplification circuit 67 cuts one sensor output of the amplification circuit 65 through a capacitor CoT-DC and connects it to an operational amplifier OP.
After being AC amplified by s, 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 i-[[32 as an inverting input, detects the zero-cross point of the differential signal from the differential amplifier circuit 66, and outputs a zero-cross signal. On the other hand, the operational amplifier OP7 of the search comparator 90 has the same reference level VTH as the inverted input as the operational amplifier OP4, and receives the signal from the A c amplifier circuit 67 and uses the signal which has cut the reference level VTH as an inter-song registration permission signal. The zero cross signal and the inter-song registration permission signal are input to the gate circuit 72, and the zero cross signal is output when the pickup arm 5 is down based on the mute signal output from the system controller 51 (terminal 2 in FIG. 11). When the signal is up, a song interval registration permission signal is input to the system controller 51 (terminal 14 in FIG. 11).The system controller 51 registers the center point between the songs being played based on the zero cross signal and the song signal. Detection is performed.

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 an example of the components 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 band servo from the inter-track sensor part 54. The speed servo signal from the speed detection coil 26 amplified by the amplifier circuit 74 is applied to the non-inverting input terminal, and the difference between the two with respect to the reference voltage is amplified to supply current 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 speed servo signal are each
The signal is supplied to the differential amplifier 75 as necessary by switch means 77 and 78 that turn on and off in accordance with control from the XJ controller 51. The amplifier circuit 74 is an operational amplifier OP.
It has an IQ and 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, r and VR+ are volumes 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. Assuming that the needle tip 48 has now moved to the outer circumference of X (+11111) with respect to the center of the song, V
(v) band servo signal is generated. In response to this signal, the horizontal drive circuit 73 drives the drive coils 25a, 25.
A current is supplied to b, and the needle tip 48 moves in the inner circumferential direction until it is located on the center of the song. Controlling the needle tip 48 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 other program plays, the drive voltage generated by the drive voltage generation circuit 79 (Fig. 1.1) is used. is applied to the inverting input terminal of the operational amplifier OPs, and the drive voltage generation circuit 79 generates a signal based on a control signal indicating high-speed, inner circumferential direction and outer circumferential direction drive output from the terminals f26, 27 and 28 of the system controller 51. By changing the value and polarity of the drive voltage with respect to the reference voltage, the moving speed and direction of the pickup arm 5 can be controlled.

In FIG. 14, a cancellation coil 80 is integrally provided with the C1 drive coil 25b, and the speed detection coil 26
are connected in series. This canceling coil 80 is intended to increase the S/N ratio of the output of the speed detection coil 26 by canceling noise components generated by the drive coils 25a and 25b, thereby improving the stability of the speed servo. That is, 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. By providing it in series with the coil 26, the alternating current component can be canceled.

A variable resistor vR is connected in parallel to the cancel coil 80, and the cancel loop is made 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, DD
An area sensor 34 and an end area sensor 35 are configured, and a pickup plate 2 that interlocks with the pickup arm 5 controls the gap between the light emitting section 53A and the light receiving section 53B.
7 rotates. 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 A signal (b) to the terminal 12, the address B signal (c) to the terminal 13, and the DD area signal (d) to the terminal 11. Ru. The role of each sensor is as explained in the fifth section.

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 30CInLP board will be explained based on the timing charts shown in 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 time t1, turn on music selection 4-"3" on 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 1J is turned on, LED rIJ (v) lights up as well. If you make a mistake in setting Progera 11, the program will be cleared by turning on the stop key, so you can set it again. After completing the program setting, when the start key is turned on at time t2, the terminal 8 (h) of the system controller 51 goes to 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 L
ED 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 time t3 when the DD area sensor 34 reaches the vicinity of the center spindle (near the center of the disk), the output (0) of the DD 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 DD area sensor 34 is inputted to the terminal 11 of the system controller 51, and in response, the (m
) respectively go to the L level, operating the DD drive system 19, and entering the DO 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 D1] drive system 19. Mechanical drive system 7 remains DD even after latch release
The operation continues in the lead-in direction ahead of the drive system 19, and the cam portion 8a of the rotating member 8 reaches the completion detection switch 42.
is turned off, the output (f) of this switch 42 is inputted to the terminal 39 at H level, and in response, the terminal 8 (h) becomes H level.
level.

Terminal 9(j) transitions to L level, rotating motor 9(j
) is reversed in the 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 upper 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 performs the time [
Address A sensor 3 input from 3 to terminals 12 and 13
2a(p) and the pulse signal from the Bt-sensor 32b(q), and when the predetermined address is reached (from 4), the address search is started to register between songs. When the pickup arm 5 is raised (at the time of search), the inter-song signal (S) is input from the inter-song sensor+J part 54 to the terminal 14 and input to the terminal 15 in response to the inter-song registration permission signal (r>). , register addresses sequentially starting from the innermost track on the disc.Pickup arm 5 is 30CIIIL.
Time t5 when reaching the reach end address outside the outer edge of the P board
A final disc number/size determination is performed.

The size is determined in advance as 17cm, 25cm and 30cm.
When searching, the value obtained by adding, for example, 3 to the address indicating the drop position corresponding to the disc size and the address of the last registered song (the outermost song) registered between songs are sequentially searched as shown in the flowchart of Fig. 19. This is done by comparing, and if the relationship of last registered music address ≦ drop position address + 3 is established, then the actual disc size is determined from the drop 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, the registered song is modified so 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 (1) level, the terminal 28 (m) becomes 1 level (the terminal 26 remains at L level), and the driving direction of the DO drive system 19 is reversed, thereby the pickup arm 5
moves at high speed toward the third song, which is the first B-O-gram song, and begins to move between the three songs []. At this time (time t5
), at the same time, the terminal 4(d) goes to L level, activates the phonoter b5, and rotates the turntable 3(e). Also, the LED r3J (u
) repeats blinking from time t5 until the performance of the third song ends. The inter-track detection operation will be explained according to the chart in FIG. +4) (time point [6), the terminal (k > becomes H level and the moving speed of the arm becomes low. Then, in the low-speed driving state, detection between songs is performed from before the third song, and the When the inter-song signal @(S) from the inter-sensor part 54 is connected to the terminal 15, the system controller 51 detects the α rising of the pulse (time t7).
The terminal 27 (+) is set to 1 level to stop the DD drive system 19, and the L
EDr start, turn off + (W) and “up” (V). At the same time, the terminal 8(h) is set to L level, and the rotary motor 9(j) of the mechanical drive system 7, which has been in the timing state, is
to start the elevation down operation.

At this time, terminal 3 (C) also goes to L level and transistor Q2
By setting the collector of (shown in Fig. 11) to H level, the switch means 77 (shown in Fig. 10.14) is brought into conduction state, and the band servo is turned on.
The pickup arm 5 is driven in the horizontal plane by the DD drive system 19 according to the band servo signal (differential signal of the outputs of the two inter-track sensors) from the DD drive system 19. 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 detects the completion of the descent.
When the switch 43 is turned on and its output (a) goes to the L level, the terminal 9) also goes to the L level, and the rotary motor 9 (j) of the mechanical drive system 7 stops, completing the down operation and playing the third song. to go into. At time 111, the terminal 3(c) transitions to the 14 level, turning on the transistor Q2, thereby making the switch means 77 non-conductive and turning off the band servo. The mute signal (b) that was previously output from terminal 2
) disappears and becomes L level) The output of the buffer 86 also becomes L level.
By turning off the transistor QJ constituting the micoating circuit 87, the muting relay 88 is turned off and 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, the switch means 71 becomes conductive, and the operational amplifier OP4. By switching the reference level V 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 output of the buffer 89 also becomes the [level], making the switch means 78 (shown in Figure 10.14) non-conducting, thereby causing the speed detection coil 26 in the DD drive system 19 to be transferred from 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 a torque level, so that the resistance R+ in the drive voltage generation circuit 79 (shown in FIG. 11) increases.

DO 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 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 inputs zero cross signal (r) and inter-song signal (S) at terminals 14 and 15. It becomes machine state.

In this state, the Trubel zero cross signal (r> is input to the terminal 14 of the system controller 51, and the terminal 1
At the timing of the rising edge of the signal (") after one positive pulse that is the inter-song signal (S) is input to 5, the system controller 51 detects that the needle tip is at the third and fourth songs. (time point r9). At the time point t9' when the end of the performance of the third song is detected, the trubel mute signal (b) is output from the c end f2, and by turning on the transistor Q3, the mute relay is turned on. 88 is turned on and cuts off the audio signal system. At the same time, the sensor part 54 between songs is switched to up, and the speed servo of the DD drive system 19 is turned on. At this time, L E D ', r up'. (y) lights up and the LED rlj that was lit
(v) flashes until the end of the first song. Furthermore, the terminal 8 (h) is connected to a torque bell to drive the rotary motor 9 of the mechanical drive system 7.
The elevation up operation is started by rotating (j) in the up direction. At this time, the rotating member 8 rotates to turn off the descent completion detection switch 43(0).

The rotating member 8 continues to rotate, and the ascent completion detection switch 42 (
f) is turned on (at time tTo), terminal 9(i)
becomes a truvel, the rotary motor 9(j) stops, and the elevation up operation is completed. At the same time, the terminals 26 and 28 become a truvel, the mechanical drive system 7 operates, and the pickup arm 5 moves in the outer circumferential direction toward the first song. move at high speed. Pickup arm 5 picks up the first song if (30
cm descending position), and when it arrives at the 4th address (outside the outer edge of the disc) from the registered address of the first song (
At time T o ), terminal 2 of the system controller 51
6 becomes the torubel, terminal 27 becomes the torubel, terminal 28 becomes the torubel, and the DD drive system 19 reverses the driving direction and moves the 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 the preset lowering position address corresponding to each disk quiz.

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). All programs are finished.

At the time t14 when the ascent completion detection switch 42 is turned on,
End of system controller 51:! 8 is Trubel.

The terminal 9 is maintained at torque, the rotary motor 9 of the mechanical drive system 7 continues to rotate in the lead-out direction t-J, and using this as a driving source, the pickup arm 5 moves at high speed in the rest direction (auto return). The rotation of the turntable 3 also stops. Time t when the pickup arm 5 reaches the rest position and the rest position detection switch 44 is turned on
At I5, the terminal 9 of the system controller 51 becomes the torque level, the rotary motor 9 of the mechanical drive system 7 stops, the big-up arm 5 enters the special 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 218. R First Day - The loading section Get is assumed to be in the closed state, and when the [Oven/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 The base 4 protrudes toward the front as shown in FIG. 1(b). When the open operation continues and the slide base 4 turns on the oven detection switch 64(e) at time 2, the terminal 6 of the system controller 51 transitions to H level, the loading motor 60 is stopped, and the oven operation is completed. . If the A-bun detection switch 64 does not turn on even after a predetermined period of time (for example, 25 seconds) has elapsed since then, the motor will automatically stop and stand by at that point. .

Place the disc on the turntable 3, and at time t3 [
When the "Arm Manual Set" key is turned in, terminal 19<t) of the system controller 51 goes to L level.
In response, the terminal 8(J) becomes 1-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 51 becomes level, causing the phono motor 55 to rotate. 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 point 14 when the output (Q) of the DD area sensor 34 is generated, the terminals 261> and 28 (o) of the system controller 51 are respectively set to L.
level, the DD drive system 19 is operated, and the drive system is switched from the mechanical drive system 7 to the DO 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 lead-in at high speed, and the output of the address A sensor 32a (
At time t5 when, for example, the 103rd pulse of r) is input to the terminal 12 of the system controller 51, the terminal 26 (m) becomes H 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 △ sensor 32 corresponding to the lowering position of 30CI11 is detected.
For example, at time t6 of the rising edge of the 105th pulse of a,
The terminal 28 (o) of the system controller 51 goes to H level, the DD drive system 19 stops, the pickup arm 5 stops in the raised state, and manual performance starts.
It becomes l state. Next, when the "elevation" key is turned on, the terminal 8(j) of the system controller 51 becomes L level, the rotary motor 9(1) of the mechanical drive system 7 rotates in the down direction, and the elevation down operation starts. .

At this time, the LED r-up J (W
) goes out. Cam portion 8a of rotating member 8 of mechanical drive system 7
At time t8), the system controller 5 turns on the descent completion detection switch 43(1) to complete the down operation.
1 terminal 9(k) becomes L level, and the mechanical drive system 7 stops. At this time, the mute signal (b) which had been output from terminal 2 at the same time disappears and becomes L level), and the muting relay 88 is turned off and the performance state is entered.

During the performance, if you keep pressing the "Start" key at time t9, you will move to the locate-in operation. First, at time t9, terminal 8 (j) of the system controller 51 becomes H level, and the mechanical drive system 70-rpm motor 9 (1 ) rotates in the up direction and enters the elevation up operation.At the same time, the LED r
“Start” (V) and “Up” (W) will light up,
Also, an H level mute signal (b) is output from terminal 2, turning on muting relay 88 and interrupting the performance.

When the ascent completion detection switch 42 (h) is turned on (time t
ID), terminal 9 (k) of the system controller 51
) becomes level T(), and the rotation motor 9 of the mechanical drive system 7 (
1) is stopped and the ascent is completed.

Next, the terminal 27 (n) becomes L level, the DD drive system 19 is operated, and the pickup arm 5 is moved in the inner circumferential direction at a 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 the "Start" key is pressed and held at any position (time j n ), the terminal 27 (n) of the system controller 51 becomes H level, the DD drive system 19 stops, and the pickup arm 5 goes into the raised state. and stop.
At the same time, the LED "r start" stops blinking. Then, turn on the "elevation" key at time t12
), 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. Move (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 so that it is performed when the range A is exceeded.

When the performance continues and the tip 48 reaches the vicinity of 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 the address A is inputted to the terminal 10 of the system controller 51.
Outputs h(r), (s) of the first position sensors 32a and 32b
Based on this, when the tip 48 enters the lead-out groove and the feed speed increases, end detection is performed. When the end is detected +
At step 4, 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, LED r up”
(W) lights up and a mute signal (+) is output, turning on the muting relay 88 and cutting off the audio signal system. When the soil completion detection switch 42 (h) is turned on and the up operation is completed, the logic of terminals 8 and 9 of the system controller 51 is maintained, and the mechanical drive system 7 causes the pickup arm 5 to rest. Start auto-return in direction. At time 116 when the pickup arm 5 returns to the rest position, the rest position detection switch 44(a) is turned on, and at time t17, after a predetermined period of time has elapsed from time t16, the terminal 9(k) of the system controller 51 becomes H level and the mechanical The drive system 7 is stopped and 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 "oven/close" 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 to move the slide base 4 into the main body. Drive to store. When storage is completed and the slide base turns on the close detection switch 63 (d) (at time t)
+s), the system controller 51 responds to this by setting the terminal 7(g) to H level, stopping the loading motor 60, completing the closing, and entering a standby state for all operations.

When performing so-called digital synchronization, which automatically records the playback sound on a tape deck (not shown) during program performance and manual performance, first connect the sync output terminal of this system to the remote pause terminal of the tape deck. 62 (shown in Figure 11), put the deck in a 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, L level synchronized outputs (1) are generated at times t 7 , t 101 j +2, and t 14 in response to the elevation operation, as shown in FIG. 18B. 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 the manicoal performance, as shown in FIG. 21B, the time j 7 *
At tlG, t+2 and t+s, synchro output (
U) occurs, and automatically enters recording mode 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 in detail above, in the present invention, during lead-in operation of a pickup arm equipped with an address sensor that detects the arm position and a song interval sensor, the address sensor searches for the song interval based on the output of the song interval sensor. The address is set based on the output of the sensor, and the song interval is 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 point of detection, the song interval is registered based on the output of the song interval sensor. If the song interval is not found, it is further searched for an address a predetermined distance away from the specified address, and if it is still not found, the same song selection operation is repeated at least once after moving the pickup arm toward the outer circumference.
If the same song selection operation is repeated a predetermined number of times and the song interval cannot be found, the process moves on to the song selection operation for the next program song in the order. If the song is not found, the program moves to the next song selection operation, allowing speedy program performance.

[Brief explanation of drawings]

1 is a schematic perspective view showing a record player according to the present invention, (a) shows the closed state, (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,
FIG. 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 shell, and FIG. 8 is a schematic perspective view showing the pickup arm assembly. FIG. 9 is a diagram showing the output characteristics of the inter-song sensor located between songs. FIG. 10 is a block diagram showing an example of the control section. The figure is a circuit diagram showing a specific example of a part of FIG. 10, FIG. 12 is a circuit diagram showing a specific example of a part of the inter-song sensor,
13 is a waveform diagram of each part in FIG. 12, FIG. 14 is a circuit diagram showing a specific example of the DD 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 outputs of each sensor in Fig. 16, and Figs. 18A and 8 are timing charts for explaining operations during program play. Figure, 1st
Figure 9 is a flowchart for explaining the operation of size determination, Figure 20 is a flowchart for explaining the operation of detecting between songs, and Figures 21A and B are timing charts for explaining the operation of manual performance poetry. It is a diagram. 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...DD
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...Loading motor 70...Sensitivity changeover switch 71.77.78...Switch means 79...
... Drive voltage generation circuit 80 ... Cancellation coil 87 ... Muting circuit Applicant Pioneer Corporation Agent Patent attorney Motohiko Fujimura

Claims (1)

[Claims] During lead-in operation of a pickup arm equipped with an address sensor for detecting the 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 designated 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,
After moving the pickup arm in the outer circumferential direction, the same song selection operation is repeated at least once, and if no gap between songs is found even after repeating the same song selection operation a predetermined number of times, the process proceeds to the song selection operation for the next program song. A method for detecting intervals between songs.