JPS6120716Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a linear tracking tone arm type record player, and more particularly to an improved mechanism for positioning and raising and lowering the tone arm thereof.

Recently, various so-called linear tracking tone arm type record players have been put into practical use. As is well known, the structure of such a linear tracking tone arm type record player makes it impossible to manually control the positioning or elevation of the tone arm. Therefore, in such a linear tracking tone arm type record player, various means for positioning the tone arm have been proposed and realized. In one conventional example, a slit or the like is formed in a motor for driving a turntable, the slit is detected by a photoelectric detector, and a detection pulse is generated from the photoelectric detector. Then, this detection pulse is counted by, for example, a counter, and the count value of the counter is stored in a memory or the like in correspondence with the position on the record. Information from that memory is used to control the positioning and raising and lowering of the tone arm for playing the record. In this conventional example, since the number of revolutions, that is, the count value of the counter corresponds to the position on the record, the count value and the position on the record do not directly correspond. Moreover, it requires additional circuitry such as a counter and memory, making it complicated and expensive. In addition, other conventional examples have two arms that are close to each other, one arm is a tone arm, and the other arm is a dedicated arm for detecting the position on the record. do. Then, the control circuit receives information from the detection arm and controls the raising and lowering of the tone arm with a certain delay time. This conventional example does not require any memory circuitry or other complex circuitry compared to the previous one, but it does allow the connection between the point detected by one arm and the position at which the tone arm is lowered onto the record. There were errors and it was not always accurate.

Therefore, the main object of this invention is to provide a linear tracking tone arm type record player which has a relatively simple structure and allows accurate positioning of the tone arm.

In summary, this idea is to provide a recording rod for recording and reading parallel to a guide rod extending near the turntable, guide the tone arm and the recording arm by the guide rod, and guide the tone arm and the recording arm by the guide rod. The position on the record detected by is recorded on the recording medium of the recording rod by a recording means provided corresponding to the detection arm and moving integrally with the detection arm,
The positional information recorded on the recording medium of the recording rod is read out by a reading means that is provided corresponding to the tonearm and moves integrally with the tonearm, and the positioning of the tonearm is determined based on the readout information. It is designed so that its elevation and descent can be controlled.

The above objects and other objects and features of the present invention will become more apparent from the following detailed description with reference to the drawings.

FIG. 1 is an illustrative structural diagram showing an embodiment of this invention, and FIG. 2 is a side view taken along the line - in FIG. 1. A turntable 101 has a record 102 placed thereon, and is rotationally driven by a turntable drive motor 103. In the vicinity of this turntable 101, guide rods 105, 105 are provided that extend parallel to this turntable. A movable support stand (hereinafter simply referred to as a "support stand") 104 is provided on the guide rods 105, 105 so as to be slidable by the guide rods 105 and guide rollers 106.
is provided. Further, a lead screw 111 is provided between the guide rods 105, 105 in parallel thereto. This feed screw 111 is screwed into a female thread (not shown) of the support base 104 at the lower part of the support base 104 . This feed screw 11
1 is rotated by a support stand driving motor 107. That is, the pulley 10 of this motor 107
The rotational driving force from 8 is transmitted to a feed screw 111 via a belt 109 and a pulley 110. Therefore, the support stand 104 is driven by the rotation of the support stand drive motor 107. A tone arm 112 for reproducing information on the record disc 102 is mounted on the support stand 104 so as to be rotatable in the horizontal and vertical directions, and a cartridge 113 is attached to the tip of the tone arm 112. is installed. Therefore, as the support stand 104 is moved by the support stand drive motor 107, the cartridge 113 can trace over the record disc 102.

Moreover, on the support stand 104, this support stand 104
A detection arm 114 is attached so as to be movable together with the detection arm 114. At the tip of this detection arm 114,
For example, a detector 115 consisting of a combination of a light emitting element and a light receiving element is attached. That is,
The detector 115 uses a light receiving element to detect the light reflected from the record 102 out of the light emitted from the light emitting element, and can detect the information start position or the information interval position. The information position detected by this detector 115 is then transferred to the recording head 116.
given to. This recording head 116 can write or record various information on a recording medium (not shown) formed on a recording rod 117 disposed parallel to the guide rod 105. In the embodiment, a magnetic medium is used as the recording medium, and the recording head 116
We decided to record the information magnetically. Further, an erasing head 119 for erasing unnecessary information is provided near the recording head 116.
Note that this recording head 116 is mounted on the support base 104 with a detection arm 114 and therefore with a detector 1.
It is provided at a position corresponding to position 15.

Further, the tone arm 11 is mounted on the support stand 104.
A reproducing head 118 is provided at a position corresponding to the two cartridges 113. This reproducing head 118 is for reproducing information recorded on the recording medium of the recording rod 117.
In the embodiment, it was configured as a magnetic head. Reproduction information from the magnetic head or reproduction head 118 is provided to a control circuit (not shown). Note that this control circuit is, for example, disclosed in Japanese Patent Application Laid-open No. 52-141606.
Those described in the No. 1 gazette can be used.

Note that pressure rollers 120, 120, 120, and 120 are further provided on the support stand 104. The pressure rollers 120, 120, . . . sandwich the recording rod 117, thereby causing the recording head 11
The recording surface of 6 and the reproduction surface of the reproduction head 108 are
To enable reliable sliding contact with a recording medium. In addition, as can be seen from FIG. 2 in particular, the support stand 104
A tone arm elevator 121 is mounted on the . Although this tone arm elevator 121 is not shown in detail in the drawings, for example, the tone arm elevator 121 is provided with a lever that extends in the longitudinal direction along a guide rod and moves the tone arm directly up and down by displacing the lever, or with a motor. Install an eccentric cam and use this eccentric cam to connect the tone arm 112.
It is also possible to raise and lower the The tone arm support shaft 122 is provided with, for example, a fan-shaped slit plate 123 that is displaced as the tone arm 112 rotates.
are installed integrally. This slit plate 123 is detected by a tone arm angle detector 124 consisting of a photoelectric sensor, etc.
The angle error detected by 24 is transmitted to the support stand drive motor 107. Then, the support stand driving motor 107 is rotated to drive the support stand 104.
move in the direction that eliminates the inclination.

Next, the operation of automatic performance by the record player of this embodiment will be explained. A record 102 is mounted on the turntable 101, and a start switch (not shown) is turned on. Then, the turntable drive motor 103 and the support stand drive motor 107 start rotating. To this end, the support stand 104 begins to move from point A to point B in FIG. 1 at the tip of the tone arm 112. At this time, of course the detection arm 114 is also moved together. The detector 115 at the tip of this detection arm 114 is connected to the record disc 10.
The information recording start position on 2, that is, point B is detected. The information at point B is recorded by the recording head 116 onto the recording medium of the recording rod 117. Further, the support stand 104 moves, and the tone arm 112
A reproducing head 118 provided at a position corresponding to point B reads out the information at point B from the recording medium of the recording rod 117. Then, the control circuit (not shown) temporarily stops the support stand drive motor 107 and stops feeding the support stand 104. Then, the tone arm elevator 121 operates automatically or manually,
The tone arm 112 is lowered onto the record 102, and the needle (not shown) of the cartridge 113 traces the groove (not shown) on the record 102. When the needle rests on the record 102 and begins to reproduce its information, the tone arm angle detector 124
is activated, and the support stand drive motor 107 is driven so as to eliminate the inclination of the tone arm 112, and the support stand 104 is moved in that direction.

Then, the detector 1 at the tip of the detection arm 114
15 detects the recording end position, that is, point C on the record disc 102. Then, the information at this point C is recorded on the recording rod 117 by the recording head 116. When the support stand 104 further moves and the reproduction head 118 reproduces the information at that point C, this indicates that the tone arm 112 has reached that point C, and the control circuit de-energizes the support stand drive motor 107, And the tone arm is raised by the tone arm elevator 121. Thereafter, while the tone arm 112 remains raised, the control circuit causes the support stand driving motor 107 to rotate in the reverse direction, thereby returning the support stand 104 to its home position, that is, the cartridge position shown at point A.
Thereafter, the turntable drive motor 103 is de-energized and the start switch is turned off, thereby completing the series of automatic regeneration operations.

Furthermore, in the case of an audio record in which music is recorded on the record board 102, there are unrecorded portions between the songs. For example, if it is desired to play the third song from the first song (skipping the second song), the program may be stored in advance in a control circuit (not shown). That is, in that case, the detector 11 is activated while the first song is being played.
At step 5, the position between the first and second songs is detected, and the position information is recorded on the recording rod 117 by the recording head 116. And the playback head 118
When it reaches the recording position, the support stand drive motor 107 is stopped and the tone arm 112 is raised by the tone arm elevator 121. Then, while keeping the tone arm 112 raised, the support stand drive motor 107 is rotated again, and the support stand 104 is moved again. Next, the detector 105 detects the position between the second and third songs, and the detected position is recorded on the recording medium 117. When the reproducing head 118 reproduces the positional information of the inter-track position, the control circuit stops the support drive motor 107 and causes the tone arm elevator 121 to place the needle of the cartridge 113 on the record disc 102 again. In this way,
The third song is played from the first song (skipping the second song).

Although the above-described embodiment shows the case where the tone arm 112 and the detection arm 115 are mounted on one support stand 104, they may be mounted on separate support stands.

Fig. 3 is a structural diagram showing another embodiment of this invention, Fig. 4 is a side view taken from the line - of Fig. 3, and Fig. 5 is a side view taken from the line - of Fig. 3. FIG. In construction, this embodiment is similar to the embodiment shown in FIGS. 1 and 2, except as follows, and corresponding parts have been given like reference numerals and a detailed description thereof. Omitted. In this embodiment, the support stand 2 for the tone arm 212 is
04 and a support stand 20 for the detection arm 214
4' were provided separately. A tone arm 212 is attached to the support stand 204 so as to be freely rotatable in the horizontal and vertical directions, and a detection arm 214 is attached to the support stand 204' so as to be freely rotatable in the horizontal and vertical directions. The tone arm 212 is raised and lowered by a tone arm elevator 221, and the detection arm 214 is raised and lowered by a detection arm elevator 221'. The movement of the support stand 204 is controlled by a support stand drive motor 207. That is, the endless wire 225 is attached to the wire attaching portion 226 of the support base 204 at one point.
This wire 225 is connected to the pulley 210' and 2
10'', and the pulley 210' is connected to the pulley 208' of the drive motor 207 by the belt 209'. Therefore, by rotating the drive motor 207, The rotational force is transmitted to the pulley 210', thereby moving the support base 204 attached to the wire 225. On the support base 204, there is a playback head 218.
In cooperation with this playback head 218, the recording rod 2
17 is provided with a pressing roller 220.

Further, a recording head 216 is provided on the other support base 204' so as to be able to come into sliding contact with a recording rod 217. Note that it is only necessary to provide a recording medium in the recording rod 217 in the shaded area in FIG. 3. Then, the support stand 204' is self-propelled on the guide rod 205. That is, the rotation of the self-propelled motor 231 is controlled by the pulley 232 and the belt 2.
33 and a pulley 234, it is transmitted to a self-propelled roller 235. This self-propelled roller 235 is pressed against the recording rod 217, thereby driving the motor 231 to rotate and moving the support base 204'.

Next, the operation of automatic performance using the record player of this embodiment will be explained. Record disc 202 on turntable 201
, and turn on the start switch (not shown). Then, the control circuit (not shown) rotates the self-propelled motor 231 on the support base 204' for the detection arm 214. Then, this support stand 204' is moved from point E to point B at the position of the detector 215. At this time, the detection arm 21
4 remains raised by the detection arm elevator 221'.

When the detector 215 is moved to point B, the detection arm elevator 221' is automatically or manually operated to lower the detection arm 214 and the detector 2
15 close to the record 202 and fixed. Then, the control circuit subsequently controls the self-propelled motor 231
is reversed, and the support base 204' is moved from point B toward point C. When the detector 215 detects the information start position of the record disc 202, that is, the point C, the recording head 216 records the information about the size of the record disc 202 at this time and the position of the point C on the recording medium of the recording rod 217. do. Thereafter, the detector 215 is further moved in the direction of point D, and the recording head 216 records position information corresponding to the movement on the recording medium of the recording rod 217. Detector 2
15 reaches the information end position of the record 202, that is, point D, the information at that point D is transferred to the recording rod 21.
7 is recorded. Then the control circuit (not shown)
The detection arm elevator 221' raises the detection arm 214, drives the self-propelled motor 231 so as to move the support base 204' from point D to the home position, that is, point E, and stops it. .
In this way, information recording or non-recording positions on the record disc 202 are recorded on the recording medium of the recording rod 217.

Next, the control circuit controls the support platform drive motor 207
is rotated to move this support stand 204 and therefore the tone arm 212 in the direction of the record disc 202. When the tone arm 214, that is, the cartridge 213 reaches point C from point A through point B, the control circuit lowers the tone arm using the tone arm elevator 221 and moves the cartridge 213
Place the needle (not shown) on the sound groove on the record 202. In this manner, the reproduction of the record 202 continues until the cartridge 213 reaches the position D. Then, the control circuit stops the support platform drive motor 207 and stops the tone arm elevator 22.
1 to raise the tone arm 212. Then, the motor 207 is reversed to move the support base 204 to its home position, that is, the position of point A, and stop it.

It should be noted that, for example, in the case of an audio record, it will be easily understood from the description of the previous embodiment that the inter-track position can be detected in advance and playback can be started from any arbitrary track.

As described above, according to this invention, information from the detector of the position detection arm that detects the position on the record is recorded on the recording rod installed almost parallel to the guide rod, and the information is recorded on the tone arm. The information is read out by the reading means provided at the corresponding position, and the positioning of the tone arm and its raising and lowering are controlled thereby, so there is no need for a complicated circuit configuration as in the conventional system. do not have. In addition, since the positions of the tone arm and its reading means correspond, no error occurs between the detected position and the position of the tone arm. Therefore, a linear tracking tone arm type record player having a simpler construction and lower cost can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an illustrative structural diagram showing an embodiment of this invention, and FIG. 2 is a side view taken from the line - in FIG. 1. Fig. 3 is an illustrative configuration diagram showing another embodiment of this invention, Fig. 4 shows a side view taken from the line - of this Fig. 3, and Fig. 5 shows a side view of this third embodiment.
A side view taken from the line - in the figure is shown. In the figure, 101 and 201 are turntables, 102 and 202 are record discs, and 104 and 20
4 and 204' are support stands, 105, 205 are guide rods, 112, 212 are tone arms, 114,
214 is a detection arm, 116, 216 is a recording head, 117, 217 is a recording rod, 118, 21
Reference numeral 8 indicates a reproducing head, and reference numerals 120 and 220 indicate pressure rollers.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A linear tracking tone arm type record player, comprising a turntable for placing a record and rotating it, located near and parallel to the turntable; an extending guide rod; a tone arm that is movably provided so as to be guided by the guide rod, and whose tip extends in the direction of the turntable, and whose tip can be provided with a regeneration needle; a detection arm that is movably provided so as to be guided and whose tip extends in the direction of the turntable; a detection arm that is attached to the tip of the detection arm to detect information recording or non-recording positions on the record disc; means, a recording rod provided substantially parallel to the guide rod and having a recordable recording medium; a recording rod that is movable integrally with the detection arm along the guide rod and at a position corresponding to the detection means; recording means for recording detection information from the detection means on the recording medium of the recording rod; a recording means that is movable along the guide rod integrally with the tone arm and at a position corresponding to the reproduction needle; readout means for reading out the recording on the recording medium of the recording rod recorded by the recording means; and control for controlling movement, elevation, etc. of the tone arm in accordance with the output of the readout means. A record player. (2) The guide rod is provided with one movable support stand along the guide rod, and the tone arm and the detection arm are both supported by the one movable support stand.
A record player according to claim 1 of the utility model registration claim. (3) The guide rod is provided with two movable supports movable along the guide rod, and the tone arm and the detection arm are each supported by separate movable supports. A record player according to claim 1 of the utility model registration claim. (4) Of the two movable support stands, the support stand that supports the tone arm has its home position on one end side of the guide rod, and the support stand that supports the detection arm has its home position on the other end side of the guide rod. 3. A record player according to claim 3, wherein the record player is arranged such that its home position is set as its home position. (5) The record player according to any one of claims 1 to 4, wherein the recording medium is a magnetic recording medium, and both the recording means and the reading means are magnetic heads. (6) The record player according to claim 5, which includes a presser means for cooperating with the magnetic head to ensure that the magnetic recording medium of the recording rod is brought into sliding contact with the magnetic head. . (7) The magnetic head is provided on the recording medium side of the recording rod, and the pressing means is a pressure roller provided on the opposite side of the recording rod to the magnetic head, according to the utility model registration request. The record player described in scope item 6.