JPS5938972A - Controller of record player - Google Patents

Abstract

PURPOSE:To simplify the constitution of a controller of a record player and to stop accurately a pickup at a regular rest position, by revolving a record disk instantaneously with a number of revolutions of a target position by the control signal given from a target position setting means. CONSTITUTION:A counter circuit 151 is reset at the reference position of a pickup 1 and delivers a control signal in response to its count value. Then a stepping motor driving signal of a phase corresponding to the count value of the circuit 151 is generated from a counter circuit 152. At the same time, the target count value corresponding to the target position of a record disk 2 is set by a targe value setting circuit 19, and the control signal corresponding to the target count value is transmitted. A comparison 20 is carried out between the target count value and the count value sent from the circuit 151 and corresponding to the present reproduction position. Then a rotation speed control signal is generated 13 in response to the target position with the control signal corresponding to the target count value. Thus the disk 2 can be revolved by the above-mentioned control signal with the number of revolutions corresponding to the target position of the pickup 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a radar blade 7, which drives a stepping motor 3 with a drive signal having a phase corresponding to the number of channels 1 to 3. Pickup position information corresponding to numbers 1 to 19 can be used to detect the playback position of the C pickup with a simple configuration, and can control the rotation of the Rennie 1-do board at a rotation speed corresponding to the pickup target position,
To provide a control device for a blade brayer which can perform a high-speed 7-clasp operation and can also reliably stop the pickup at the die position even if the dividing means is reset. 1] Hit the mark.

FIG. 1 shows a block system diagram of an example of a conventional record brake control device. In the same figure, is 1 a record? l
For example, use an optical pickup to play back the pitches 1 to 1 on the back of the 2. System supplied with output, etc. = J-1~Low small circuit 3, output of drive circuit 4 t times! /, one C to be -95 to J
, Rele 1-1~! The cliff of 1'A 2 is displaced in the shape of a white line in the direction of II. The signal reproduced by 1 bit 7/to 1 is sent to demodulation circuit 0 by J, 1 (modulated by -1
1 to 3 are supplied to the call circuit 3 (A-i').

In addition, this type of Brake\7 can be used to play A3 and C at any playback position of Picktsu7tsuzo1! i! In order to keep the speed constant, the 1) position of the pickup 1 is detected and as it moves to the inner playback position.
It is configured to control the speed of rotation of the board.

A C shielding plate E3 is attached to the 7-terminal 5 via a gear 77, and the pulses from the 7-interceptor 9 that are output in accordance with the rotation of the 7-terminal correspond to the number of books. A base 1 (position detector 11) is installed at the innermost position (M position) of the board 2 (A3), and the pickup 1 is located at the innermost position of the board 2. The reset frequency fJ outputted from the detector 11 when the position is reached is supplied to the i1 number circuit 10 (this is referred to as a relet.
As shown in FIG.
Two sets of light-emitting/light-receiving elements 9a and 911 are provided at an interval of 1>11. Luminescence/
The rotation direction of the motor 5 is detected by a combination U of the output of the light receiving element 9a and the output of the light emitting/light receiving element 9b shown in FIG.

The pulses from the foot interrupter 9 are converted to 1 in the counting circuit 10, and then supplied to the rotation speed setting circuit 12, which generates a speed control signal Vi corresponding to the 1 to 1 count.
and is supplied to the rotational speed control circuit 13. The rotational speed control circuit 13 is supplied with a signal VO corresponding to the rotational speed of the board 2, and a speed control signal Vi.
The rotational speed Vo of the board 2 is compared with the rotational speed signal VO of the board 2, and a comparison error signal is taken out. Based on this signal, the rotational speed Vo of the board 2 is controlled to be equal to 4 equal to the speed control No. 15 Vi.
, that is, record 12 is playback 11 of picker f1.
It is controlled to rotate at a rotation speed corresponding to the position of -C.

At this time, the number of pulses/Jun1 that enters the δl number circuit 10 is M, and the change of picks 7 and 1 per pulse ◇ψ is △
e, set the innermost circumferential position of the pick 7 and the pick 1 at the position a month and a half ([ma 0, pick up 1 again at the 11'! position (J). If the radius is R1 and the function is [, Vi=f(Ri)=−f
(1<o (M △ 1'-), and the rotation speed of the culm-1-board board 2, which is the outer periphery, is configured to be low.

However, this conventional pickup moving device requires a deceleration mechanism such as A-mugisef, a pickup position detector such as a shielding plate 8, an ΔI-interrupter 9, etc.
Therefore, the device 6 is complicated, and each part must be ordered and adjusted, which has the disadvantage that it is inexpensive to construct.

In addition, in such a play 17, generally, due to the influence of the inertia of the turntable, etc., the speed control (F, even if No. Vi is output, the seed board 1-2 cannot immediately follow it. For this reason, This J corresponds to the playback position of Pickup 1. With the record brake After the configuration in which the pickup is displaced by <L L, the displacement of the pickup 1 is 1-dore lr? with respect to the speed control signal Vi. The response of Acres depends on the followability of i2's rotational speed! 1 had a bad flaw.

The present invention eliminates the above-mentioned drawbacks, and is shown in Figs.
An example of this will be described below.

FIG. 4 shows a block system diagram of an embodiment of a control device for a J-type player according to the present invention. In the figure, the same components as in FIG. , 14 is a stepping motor, Fig. 5 (Δ).

(B) has a rotation angle of 90° with a different phase.
The corresponding figure 6 (△) shows I leading phase and the same figure ([3)
It is configured to be driven by two sine wave signals a'+b with a one-lag phase shown in FIG.

The iij number circuits 151 and 'O'152 are inputted with, for example, two inputs I/I from the system circuits 1 to 11-1G.
'Additional GI E-F, reduced stop drive instruction ticket 1
11. 'l k-, let's start the f'i group. M number circuit 1
51 is 4. Ln1' is placed on the signal J from the detector 11 to the retrieval 1. It is configured to output (I-1
], the argument circuit 152 is configured to output the switching motor driving signals 8a and 8b of the IJ phase shown in FIGS. 6(A) and (r3) in accordance with this number.

In other words, as shown in FIG. 7, from the product circuit 152, if the time corresponding to the peak-to-peak period of the driving signals a and b is expressed as , then the period I is determined according to the count number to, to. ,
At t 1..., b pulses of 1-level (r ``1'
4. Integrating circuit 1 shown in FIG. ,l (integrate, !!1lto, to.

11. Drive b (ti) bells of the size according to...
No. a.

b is taken out.

The target value setting circuit 19 is supplied with a control signal corresponding to the ``1 standard address'' output from the address I+, 'l, system tsum-''n l ~ [1- small circuit 1G, and outputs a control signal corresponding to the target address. The comparator circuit 20 outputs a control signal to avoid rotating the C-lend board 2 below j rotational speed.
The control signal corresponding to the current address from the Kj number circuit 151 is compared with the control signal 11 corresponding to the target address from the target value setting circuit 10, and a -C comparison error signal is extracted.

First, control during normal performance will be explained. At this time, the operation mode switching signal from the small circuit 1G is applied to the argument circuits 151 and 1.
52 respectively inputs ■ and ■' to the rotation speed setting circuit 18.
are respectively switched to accept input 1).

For example, when displacing the pickup 1 in the normal direction (outward direction), the signals a and b taken out from the counting circuit 152 are amplified by the drive circuit 17 and supplied to the motor 14, and the motor 14 receives the drive signals a, b rotates in the forward direction to displace the pickup 1 in the outer circumferential direction. In this case, the phases of the drive signals a and b are determined by the count number (J
Accordingly, J3 is changed to C by the drive signal (71j raw position of pickup 1 which is 17 is 81 number circuit 151)
It corresponds to the number of evening. Corresponding to the position of pick-up 1 h+ et al., the blasphemy bow is packed into the system 1-1 point 1-le circuit 16, and the pick-up 1 is ilj /l: t- The displacement speed of the rack (S follower J, sea urchin servo) is set.The displacement speed of the pick abutment 1 can be varied by selecting the speed as appropriate. .

In this case, C in the argument circuits 15+ and 157 is shown in FIG. 6 (△) and (B). Since it is possible to obtain a small rotation angle i, it is possible to control the phase change fi5 between the intermediate positions 114 and 114.
The pickup 1 can be displaced in a wide range from a stopped state to an extremely high speed.

On the other hand, control signals corresponding to the 81 number circuit 151J and Rikarun 1 to number are taken out and supplied to the rotation speed setting circuit 18,
A speed control signal Vi having a magnitude corresponding to this control signal is taken out from the rotation speed setting circuit 18. Counting circuit 151
The control signal from is a signal that corresponds to the number of clicks made with the base ring 1 position of pickup 1 as a reference, so the speed 1 control number ■i corresponds to the playback position of pick knob 1. ing.

The speed control signal ■i is completely supplied to the rotational speed control circuit 13,
Record here! ! The rotational speed of the board 2 is compared with 0 and a comparison error signal is taken out, and the speed of the board 2 is adjusted according to the position of the board 1. It is controlled so that it rotates at a certain rotation speed.

In this case, if the M number circuit 152 is simply set to the reference position of the pickup 1 (for example, the rest position), then the counter circuit 152 is reset to the phase when the pickup 1 is moved from the normal rest position. It may be displaced to the zero position and may deviate from the response 1 position. However, in this embodiment, since the ti number open circuit 152 is not reset to 1, the pickup 1 remains stopped at the normal rest position, and there is no possibility that it will deviate from the rest position.

Next, the Acres It,'l lJJ IJ control IL (explanation cJ). At this time, the system system i ~ [j
J, S, i1 number circuits 151 and 152 receive a large amount of human power ■ and ■' in response to the operator-de-cutting signal from the 9th circuit 16, and rotation speed setting circuit 1B receives input ■ (; J t, + [
A control signal corresponding to the address [1°] is taken out from the 1° [1° target stage setting circuit 1° C.] which is switched, and is supplied to the rotation speed setting circuit 18 and the comparison circuit 20. This control signal is sent to the 51 number circuit 151 to avoid rotating the Renicord board 2 at the number of rotations that occur when the re-pickup 1 is displaced to the target address.
It corresponds to the control signal output from 51. In the comparison circuit 20, the target +1i:] from the i setting circuit 19
1 mark and the current box from 81 number circuit 151 are compared,
Through this comparison, a comparison error signal is extracted and C81 number circuit 1
! l l , 1 'i 2 and system control circuit 16.

Counting circuits 151 and 152 apply this comparison error signal to
+i,, + until the comparison result matches, the count is reduced by adding or misaki, and from the 4 number circuit 152, the regular counter 1
A drive signal of /j phase is output according to the number. As a result, the sussing motor 14 is rotated to the target address reproduction position based on this drive signal, and the pickup 1 is forcibly displaced to the reproduction position of the target address.

At the same time of 0.1, a speed control signal V1 corresponding to the target address is taken out from the rotation speed setting circuit 18 by a control signal from the target value setting circuit 19.11 Rotation speed control circuit 13
, the current rotational speed from record 2 is 1 garden low number V
The speed control No. 111 Vi corresponding to the target address of the rotation speed setting circuit 18) is compared, and the J, S, etc.
The rotational speed of the record disc 2 is forcibly varied so that it rotates at a rotational speed corresponding to the target address reproduction position of the big horn 1. Therefore, while reproducing the address recorded on the record, the big horn is displaced and the number of revolutions corresponding to the position of the displacement is changed to reach the target address in a shorter time compared to the conventional device that rotates the record. It is possible to obtain the rotation speed according to the

When the number sent to Callan 1 of Sl number circuit 1 matches the count/number of the target address, the signal from the comparator circuit 20 causes i
1 number circuit 1: Moon, 152 is Karan (J when floated)
At step 4, the system control circuit 16 detects the completion of the access.

Here, set the radius J3 to the innermost circumference position of pickup 1, and set the radius J3 to the current playback position of pickup 1.
Rib ¥ to the target address position of pickup 1 (J
R: 2, counting circuit 151.1! i2 to a3
The amount of phase change (radian) of the drive signal a, [1] is △φ, and the amount of phase change of the drive signals a and b at the current right position is φ1, the amount of phase change of the drive signals a and b at the current right position, which is λj at the innermost circumferential position. Drive signal a of target number position 16 relative to circumferential position.

The amount of phase change in 1) is φ2, the radius of the heald winding shaft of -E-1/1 is 1゛, it corresponds to one period of the drive voltage signals a and b, and the rotation angle (radian) of -914 is α , the number of words is 1111, and the number is 1, which is the current position of 151.
Target address in vote 11i′i setting circuit 19<l ii
If you spell i's number 1 to N2, φ1-N1△φ φ2-N2△φ Ri + -Ro +((NI x△φxαxr), /
2π) Ri 2 = Ro −1−((N2 X△φ×α
×1゛)/2π). Also, the speed control signal Vi is
C1■i = f (Ri
+ ) Or, it can be expressed as Vi −=f (Ri 2 ).

It should be noted that the suspension motor 14 -C can be similarly applied to either a J-tally type or a linear type.

Further, the signal for driving the speed shifting 14 is not limited to a sine wave, but may be an NL wave, a triangular wave, etc., selected as appropriate depending on the feeding accuracy of the speed shifting 3 to be used. good.

As described above, the control device for the pickup 7 according to the present invention performs the step-3, which linearly displaces δμ in the radial direction of the pickup, and the counter i at the reference position of the pickup. - Reset l-1, and output the control signal according to the count number several thousand times, and this)J run 1 to 1J (1'/phase) depending on the number of steps and overnight driving. 1) Set the number to []1 mark no known 1 corresponding to the [1 mark] corner of the -1-do board and set the number to this target mark] / according to the number The target position setting means outputs control number 61, and compares the run number 1 corresponding to the existing playback position from the '1st four number means with the target run number 1 from the target position setting means. [count of the first h1 number means] ~ comparison means to make the number into a target number 1'' non-l- number, etc.
71, 2 rotation speeds corresponding to the target position by control signals according to the 1° 1 mark count 1 to number! The S1 control signal is set to 15I, and this rotational speed control signal is set to J, and the number of revolutions corresponding to the target position of the pickup is set to 1F (IL11). Detection of the playback position (3-Conventional) It is not necessary to use a seat cover plate or an interrupter, etc. Also, in order to use stepping Tanabata, it is necessary to use the first and second four number means. shadow 1
It is easy to obtain the specified rotation speed corresponding to several speed marks,
There is no need to use a conventional speed reduction mechanism, and J.
m) the device can be simply configured compared to the previous one from t+1;
In addition, it is not necessary to take and adjust the above-mentioned parts, and the configuration can be made at low cost. When the address is reached, the pickup can be displaced to the target position 1, and the address recorded on the record board is then moved again from 11 to 11, and the pickup is moved to the target position 1 according to this displacement position. Compared to the conventional device that avoids rotating the disk by increasing the number of revolutions, it is possible to reach a higher speed than the conventional device, and since the second stage of several tens of stages is not re-retted by the quasi (Q/iFj) after being picked up, , Bic) '2/'s reference position reset [・J, sea urchin pick j' knob of the configuration to be displaced from the regular response 1 position to the position of phase 0 that was set It has features such as being able to reliably stop the pick j' at the proper rest position.

[Brief explanation of the drawing]

Figure 1 is a block diagram of an example of a conventional device, and Figures 2 and 3 (Δ) and (B) are diagrams showing the positional relationship between the shielding plate and the photointerrupter used in the conventional device, and the output waveform of the photointerrupter. Figure 4 is an example of one embodiment of the present defense device [1 system IA diagram, Figure 5 (△), ([3] is S)
- Diagram showing the rotation angle of the topping L-ta, Figure 6 (△), (
+3) is the waveform diagram of the driving signal, No. 7.
The figure is a pulse signal waveform diagram of the A phase corresponding to the count number in the 81 number circuit L:d5, and FIG. 8 is a circuit diagram of the integrating circuit in the 81 number circuit. 1... Picker - 1, 2... TII -t? I
8, 11... It quasi-position detector, 13... Rotation speed control circuit, 14... Suaping Tanabata, 151.1
57... Re 1 failure circuit, 16... System 11 control I-ru lpl k'8.18... Rotation speed setting circuit,
1<)・Scream] Standard setting circuit, 20... Comparison circuit. 3

Claims (1)

[Claims] Pick 7 Tsuzo] - Do? ! The 1st 51 outputs a control signal according to the number of the heavy wall position of the pick 7 in the radial direction of H, and then the heavy wall position of the pick 7 is outputted. Several steps and the click 1
- a second counting means for outputting the stepper drive signal of the IC phase according to the number; and a second counting means for outputting the stepper drive signal of the IC phase according to the number; a target position setting means for outputting a control number 211 in accordance with the number of steps; a comparison means for comparing the count number of the first four number means with the target count number to bring the count number of the first four number means to the target count number; and the target b run 1;
J to the control signal corresponding to the number of targets (corresponding to f/defense!), two rotational speed control signals to the rotational speed control signal, J to the rotational speed control signal
, and a control means for controlling the record to rotate at a rotational speed corresponding to the target position of the pickup.