JPS5847573Y2 - Record player arm horizontal position detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an arm horizontal position detection device using optical means, which is used, for example, in an electronically controlled fully automatic record player.

A fully automatic record player equipped with an electronically controlled automatic mechanism has already been developed by the same applicant.

This record player employs an arm horizontal position detection device using optical means.

It is conceivable that this horizontal position detecting device could be improved as described below by adding improvements to the device developed above.

In this method, a slit plate is attached to the horizontal axis of the arm, and a photocoupler is used to detect the slit on the plate, thereby detecting the horizontal position of the arm.

More specifically, a play hole whose starting end corresponds to the play start position of the record and whose end corresponds to the play end position of the record, and a rest hole corresponding to the rest position are formed on the slit plate.

Furthermore, photocouplers are provided to detect the play hole and the rest hole, respectively.

Then, by detecting the start and end of the play hole with a Play Co. photocoupler and detecting the rest hole with a rest milk photocoupler, the arm is This is to detect when the arm reaches the end position of the record and when the arm returns to the rest position.

In such a device, the play hole on the slit plate is
When the slit plate is reversed (when the arm is returned from the record playing end position to the rest position, for example, the slit plate is reversed), the ending end is detected as the starting end, and the starting end is detected as the ending end by the photocoupler.

Therefore, a detection hole is further formed on the slit plate, and a photocoupler is provided to detect this detection hole.

That is, the detection hole detects when the end of the play hole is detected.
Detected by a photocoupler.

In other words, the end of the play hole is detected while the detection hole is being detected by the photocoupler.

Therefore, if the end of the play hole is detected while the detection hole is being detected by the photocoupler, that end is determined to be the terminal end.

On the other hand, the starting end of the play hole is detected in a state where the detection hole is not detected by the photocoupler.

Therefore, when the end of the play hole is detected in a state where the detection hole is not detected by the photocoupler, that end is determined to be the starting end.

Now, in the arm horizontal position detection device as described above,
It is conceivable to hold the photocoupler on a movable adjustment arm, but if the photocoupler that detects the rest hole and the photocoupler that detects the detection hole are held on each movable adjustment arm, the number of parts will be reduced. increases, and the configuration becomes complex.

This idea was created in view of the above points, and by holding the photocoupler that detects the rest hole and the photocoupler that detects the detection hole on the same movable adjustment arm, the number of parts is reduced and the configuration is simplified. An object of the present invention is to provide an arm horizontal position detection device for a record player.

Examples of this invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an arm horizontal position detecting device according to an embodiment of the present invention, and FIG. 2 is a side view of the same device taken along line nn in FIG. 1 and showing the arm together.

In these figures, 1 is an arm, 2 is an arm horizontal axis, and this arm horizontal axis 2 is rotatably held in a housing 3 by an arm horizontal bearing 4.

A slit plate 5 is attached to the arm horizontal shaft 2 held in this manner.

This slit plate 5 is formed into a fan shape, and on its plane there are rest holes 6.30crrL play holes 7.17 for record discs.
(M record play hole 8, and play holes 1 and 8
A termination detection hole 9 is formed.

Here, the rest hole 6 corresponds to the rest position.

In addition, the play hole 7 for a 30α record has a starting end 7 and a 3
0cIrL Corresponds to the start position of the record, and the ending position is 7.
□ corresponds to the play end position of the record, and similarly, the play hole 8 for the 17α record has the starting end 81 at the 17
The performance start position and end 82 of the CrrL record correspond to the performance end position of the record.

10 is a first movable adjustment arm located parallel to the slit plate 5, and 11 is a second movable adjustment arm located similarly.

These movable adjustment arms 10°11 are connected to the slit plate 5.
It is attached to the horizontal bearing 4 so that it is held concentrically with the horizontal bearing 4.

Furthermore, the movable adjustment arms 10 and 11 are rotatable relative to the horizontal bearing 4 during adjustment.

A photocoupler 12 for detecting the rest hole 6 and a photocoupler 13 for detecting the end detection hole 9 are held on the first movable adjustment arm 10.

Further, on the second movable adjustment arm 11, photocouplers 14.15 for detecting each of the play holes 7.8 are held.

In this case, photocoupler holders 16, 17 are mounted on the movable adjustment arm 10.11, and this holder 1
Photocouplers 12, 13, 14, and 15 are mounted on the photocouplers 6 and 17.

Further, each of the photocouplers 12, 13, 14.15 is composed of a lamp 18 and a light receiving element 19.

Next, the operation of the device configured in this way will be explained.

First, when the arm 1 is at the rest position, the slit plate 5 is in a state where the rest hole 6 is aligned with the photocoupler 12.

That is, the rest hole 6 is detected by the photocoupler 12, and it is thereby detected that the arm 1 is at the rest position.

Next, when the arm 1 is horizontally driven in the direction of the record from the rest position, the slit plate 5 is rotated forward clockwise in FIG. , 30cIrL starting end 7 of play hole 7 for record disc. matches the photocoupler 14.

That is, in the photocoupler 14, the light receiving element 19 changes from a non-light receiving state to a light receiving state.
The starting end 71 of the rfL record play hole T is detected.

Furthermore, it is thereby detected that the arm 1 has reached the performance start position of the 30cIfL record.

30CrfL Once the arm 1 has reached the playing start position of the record, it then descends to the above position and starts playing the record. During this playing, the arm 1 follows the grooves on the record. and sent horizontally.

Therefore, the slit plate 5 also rotates further clockwise.

When the arm 1 reaches the playing end position of the 30 record disc, the slit plate 5 is in the state immediately after the terminal end 7° of the 3.0 crfL record play hole 7 has passed the photocoupler 14.

That is, in the photocoupler 14, the light-receiving element 19 changes from a light-receiving state to a non-light-receiving state.
The terminal end γ2 of the IrL record play hole 7 is detected.

Further, it is thereby detected that the arm 1 has reached the performance end position l of the 30cfrL record.

After the arm 1 has reached the end position of the 30cII record and finished playing, it is raised and then basically driven horizontally to return to the rest position, and further lowered onto a rest stand (not shown).

When the arm 1 returns to the horizontal position, the slit plate 5 is reversed counterclockwise in FIG.

Then, when the arm 1 returns to the rest position, the rest hole 6 is detected again by the photocoupler 12.

Furthermore, it is thereby detected that the arm 1 has returned to the rest position.

Now, as mentioned above, the slit plate 5 is rotated forward and reverse together with the arm 1, but when it is reversed, in this case, the terminal end 72 of the play hole 7 for a 30cm record is the starting end, and the starting end is 7 is detected as the termination by the photocoupler 14.

Therefore, regardless of whether the slit plate 5 rotates forward or backward,
It is necessary to determine the starting end γ1 as the starting end and the ending end 7□ as the ending end.

Therefore, a termination detection hole 9 is formed on the slit plate 5, and a photocoupler 13 for detecting the termination detection hole 9 is formed on the slit plate 5.
is provided.

That is, the end detection hole 9 is detected by the photocoupler 13 before and after the end 7□ of the play hole 7 for the 30α record is detected by the photocoupler 14.

In other words, the end 7□ of the play hole 1 for a 30CrrL record is detected when the end detection hole 9 is detected by the photocoupler 13.

Therefore, when the end (terminal end 12) of the play hole 7 for the 30 (1177 le
2.

On the other hand, the starting end 7 of the play hole 7 for the 30cI'fL record
1 is detected by the photocoupler 14 when the end detection hole 9 is not detected by the photocoupler 13.

Therefore, when the end detection hole 9 is not detected by the photocoupler 13, the play hole 7 for the 30 crn record is
If the end of (starting end 7□) is detected, that end is starting end 71
It is determined that

Note that the above operation explanation was made using the play hole 7 for a 30crrL record and its photocoupler 14, but the 17
cIrL record play hole 8 and its photocoupler 1
The same applies to 5.

That is, when the arm 1 reaches above the play start position of the 17CrrL record, the start end 81 of the play hole 8 for the 17CrIL record is detected by the photocoupler 15, and thereby the arm 1 reaches the play start position of the 17CrrL record. is detected.

Furthermore, when the arm 1 reaches the playing end position of the 17CIn record, it is detected by the 77 record coupler 15 at 17, and this also causes the arm 1 to
7 (It is detected that the performance end position of the m record has been reached.

Also, the starting end 81 of the play hole 8 for the 17crrL record.
and the terminal end 8□ are determined by the terminal end detection hole 9 and the photocoupler 13.

Further, in the above-mentioned device, the first movable adjustment arm 10
A photocoupler 12 for detecting the rest hole 6 and a photocoupler 13 for detecting the end detection hole 9 are held on the top, and a photocoupler 14 for detecting each play hole 7, 8 is held on the second movable adjustment arm 11. 15 is retained.

Therefore, the timing at which the rest hole 6 is detected by the photocoupler 12 and the actual position of the arm 1 are adjusted by rotating the first movable adjustment arm 10.

Furthermore, the timing at which the play holes 7 and 8 are detected by the photocouplers 14 and 15 and the actual position of the arm 1 are different from each other in the second
Adjustment is made by rotating the movable adjustment arm 11.

Note that the rotation adjustment arms 10 and 11 are held concentrically with the slit plate 5.

Therefore, even if the movable adjustment arm 10.11 is rotated,
Photocouplers 12, 13, 14.

The locus 15 is on the center line of the rest hole 6, play holes 7 and 8, and end detection hole 9, and does not deviate.

Furthermore, if the timing at which the rest hole 6 is detected by the photocoupler 12 is adjusted by rotating the first movable adjustment arm 10, the timing at which the termination detection hole 9 is detected by the photocoupler 13 is shifted; On the other hand, there is a certain range of detection timing, and the deviation is absorbed within this range, so there is no problem.

Furthermore, this allows adjustment of the detection timing of the photocoupler 12.

The embodiments have been described in detail above, and in this invention, a photocoupler for detecting a rest hole and a photocoupler for detecting a detection hole are held on the same movable adjustment arm.

Therefore, there is only one movable adjustment arm for this photocoupler, and the number of parts can be reduced and the configuration can be simplified.

Furthermore, as is clear from the above embodiment, the play hole detection photocoupler is also held on a similar movable adjustment arm.

Therefore, in this case, the same parts (movable adjustment arm) as those on the play hole detection side can be used, and adjustment can be performed in the same manner.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the arm horizontal position detecting device for a record player according to this invention, and FIG. 2 is a side view of the same device taken along the line T in FIG. 1 and shown together with the arm. . 2...Arm horizontal axis, 5...Slit plate, 6...Rust hole, 7...30 (M record play hole, 71... ...starting point, 72...
...End, 8...Play hole for 17cm record, 81...Start, 82...End, 9...End detection hole, 12 ~15...
Photocoupler, 10...First movable adjustment arm. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A play hole whose start end corresponds to the play start position of the record and whose end corresponds to the play end position of the record, a detection hole for determining the start and end of this play hole, and a rest hole corresponding to the rest position. In a record player arm horizontal position detection device comprising a slit plate formed and attached to the arm horizontal shaft, and a photocoupler for detecting the above-mentioned companies, a photocoupler for detecting a rest hole and a photocoupler for detecting a detection hole are used. An arm horizontal position detection device for a record player, characterized in that a coupler and a coupler are held on the same movable adjustment arm.