JPH03222143A - Automatic cassette changing device for tape player - Google Patents

Abstract

PURPOSE:To rapidly allow a tape cassette to get away from a clinched state by providing a light shield detection means on the back side of the tape cassette loaded in a holding means and actuating a countermeasure means in the case of detecting that it takes longer time than the light shield time at the time of loading. CONSTITUTION:A carrier 1 being a holding means holds the tape cassette A inserted in a horizontal direction. A compartment 8 arranges and supports, for example, five carriers 1 in a vertical direction. A main base 11 being the base of a pulling means is allowed to ascend and descend. By allowing the main base 11 to ascend and descend and moving to the position of the specified carrier 1, the carrier 1 is held by holder plates 19 and 20 to be pulled out. Then, the main base 11 is allowed to descend so as to load the tape cassette in a tape driving mechanism provided on a main chassis 25. A light emitting diode 34a and a phototransistor 34b are provided on the back side of the carrier 1 supported by the compartment 8. In the case of detecting that it takes longer time than the light shield time at the time of loading, the countermeasure means is actuated and the tape cassette is allowed to get away from the clinched state.

Description

DETAILED DESCRIPTION OF THE INVENTION Second Industrial Application Field The present invention is a method in which a plurality of tape cassettes are loaded, one of them is selected and set in a tape drive mechanism, and the tape is recorded.
This invention relates to an improvement in a cassette automatic change device for a tape player that can return this tape cassette to its old position after playback and set another tape cassette on a tape drive mechanism.

2. Prior Art] In the conventional automatic cassette change device of this type of tape player, a plurality of tape cassettes are loaded in the tape player, and one of them is selected and set in the tape drive mechanism using rope ink means. Then, the recording
Perform playback.

When the recording and playback are completed, the loading means performs an eject operation to return the tape cassette from the tape drive mechanism to the tape cassette loading position.

At this time, the tape cassette being ejected may be returned to the position where another tape cassette is loaded due to malfunction of the loading means, erroneous memory of the position of the rope-inked tape cassette, etc. .

Then, the loaded tape cassette (or 'J) is prevented from operating during the ejection operation by its holding means, overcurrent flows to the motor and the motor overheats, or (5) is caused by the clinching. , the tape player becomes malfunctioning and requires repair.

In order to prevent this, it is necessary to take measures such as determining this condition, re-detecting the position of the loaded tape cassette, and retrying the eject operation based on this detection. .

Conventionally, detection means for determining such a lynching state include an overcurrent detection circuit of the motor that drives the loading means, detection of the start of ejection, and detection of the end of ejection for a certain period of time. was.

An example of a flowchart up to countermeasures based on these detections is shown in FIG.

When an eject instruction is issued to the tape cassette set in the tape drive mechanism as step S2□, the rope ink means starts ejecting, and the start is detected as step S22.

Then, in step 523, it is determined whether or not the end of ejection is detected, and if it is detected, the process proceeds to step S2.
G to end the cycle.

However, the detection of its end! If good, step 5
At step 24, it is determined whether a predetermined time has elapsed, and if the predetermined time has not elapsed, it is determined at step 525 whether an abnormal current has been detected.

If there is no such detection, the process returns to step 523, but if there is such detection, and if time has elapsed in step 324 (well, in step S27, the position of the loaded tape cassette is detected again). It instructs countermeasure actions such as:

[Problem to be Solved by the Invention] In the conventional cassette automatic change device, the above-mentioned clinch state of the loading means is caused by overcurrent of the motor,
This is done by detecting the start of loading as time passes.

However, in this case, the time from the start to the end of ejection is long, and there are many fluctuation factors in that time.
This results in a delay in detecting the clinch.

Also, if the overcurrent is caused by the motor, the motor current will fluctuate due to a decrease in rotational speed due to frictional resistance from dirt or other objects during the eject operation, so the overcurrent should be set too high. There is a risk that the motor may burn out, etc. Therefore, if the length of time until countermeasures are taken is inaccurate, the escape from the clinch state may be too quick;
Moreover, there are also disadvantages such as an increase in the load on the circuit.

OBJECT OF THE INVENTION: The present invention is intended to solve the above-mentioned problems of the conventional cassette automatic change device. Detecting clinch caused by: Second, the purpose is to eliminate the delay in taking countermeasures and quickly escape from the clinch state.

2. Summary of the Invention: The present invention relates to means for an automatic cassette change device for a tape player to achieve the above-mentioned object. This objective is achieved by providing a pair of light detection means above and below the tape cassette, and by providing a control circuit that operates the countermeasure means when the light-blocking time of the light detection means is longer than the passage of the tape cassette.

[Embodiment 2 of the Invention Next, an example of the implementation of the present invention will be described with respect to a cassette auto change of a digital audio tape player shown in FIGS. 1 to 19.

FIG. 4 shows the carrier 1 of the tape cassette 7) A, which is a holding means. It is formed in the shape of ', haru.

On the bottom plate 2: a protruding piece 2a and a raised part 2b are formed,
When the tape cassette 1 is inserted through the front opening of the tape cassette A1, the raised portion 2b unlocks the slider A1 of the tape cassette A.

Next: The front end of the slider A1 hits the protrusion 2a and is pushed backward, causing the slider A1 to move and release the lock on the tape cassette 7)A glue/door A2.
expose the reel hole.

A support hole 3a is bored in the side body 3, and the hole 5a of the holding plate 5 is supported by a pin 5b inserted into the support hole 3a, and a spring 5C is wound around the pin 5b.
Pressing plate 5: The tip of the masonry is urged downward 5).

A spring plate 6 is riveted to this presser plate 5, and a presser piece 6a is fixed to this spring plate 6.

Therefore, when the tape cassette A is not loaded in the carrier l, the presser plate 5 hangs down due to the biasing force of the spring 5C.

When the tape cassette A is loaded into the carrier 1 as shown in FIG. 6 from the state shown in FIG.
At the same time, the holding piece 6a presses down the tape cassette A due to the urging force of the spring plate 6, thereby ensuring the sliding of the slider A1 and also preventing the carrier 1 from holding the tape cassette A. Make it certain.

A guide pin 3b is provided upright within the side body 3, and a spring 7a is installed between the guide pin 3b and the lock pin 7 fitted thereto to urge the lock pin 7 outward. There is.

The outer surface of the side body 3 is formed with an upper protrusion 3C and a lower step 3d, and the upper pin 7b of the lock pin 7 protrudes into a recess 3e formed in the upper protrusion 3C, and the lower pin 7c protrudes from the lower part 3d.

As shown in FIGS. 2 and 7, the compartment 8, which is a support means, stands up on both the left and right sides, and this has a number of orders, for example, five horizontal guide grooves 8a or one row in the vertical direction! This is provided.

By inserting the upper protrusion 3C of the carriers 1 into the guide groove 8a, the five carriers 1 are accommodated in a vertical line in a horizontal state.

The carrier (2) is locked in the compartment 8 by being inserted into the lower bin 7C protruding from the lower stage i3d or into R8b below the guide groove 3a of the compartment 8.

In this compartment 8, a switch 10 and a slide piece 9, which can be slid in the front and back direction, are provided in each guide groove 8a and on the sides thereof.

The second slide piece 9 is provided with a spring 9a that urges the slide piece 9 backward, and the upper protrusion 3C of the carrier 1
is accommodated in the guide groove 8a, and the lower pin? When C is engaged in the hole 8b, the slide piece 9 is pushed by the carrier 1 against the spring 9a, and the slide piece 9 is separated from the switch 10.

However, the lower pin 7C came out through the hole 8b and the carrier 1
When the slider slides backward through the guide groove 8a, the slide piece 9:
The switch 10 is pushed by the spring 9a and slides backward.
Press.

Depending on the pressed switch 10, it is possible to determine which carrier 1 in the compartment 8 has been removed.

As shown in FIGS. 1 and 2, a slide tube 12 is fixed to the main base 11, which is the base of the extractor, and the slide tube 12 and the guide hole 11a slide vertically on a guide bar 13, respectively. The main base 11 can be moved up and down since they are fitted together.

As shown in FIG. 9, this main base 11 is formed with three guide grooves 11b in the front and back direction, into which the bins 14a of the slide plate 14 are inserted, so that the slide plate 14 is connected to the main base 11. However, it can be slid forward and backward.

A groove 15 of the rack 15 is provided on one side of the slide plate 14.
a) is slidably inserted, and between the slide plate 14 and the rack 5, a hole 15b is installed.

The slide plate 14 has a motor 1 as shown in FIG.
6 is mounted, a final gear 17 of several stages of reduction gears driven by this motor 16, and a gear 18 coaxial with this final gear 17.
A torsion spring 17a is installed between the gear 1 and the gear 1.
8 meshes with the rack 15.

Therefore, when the motor 16 rotates, the final gear 17 rotates,
The rotation is transmitted to the gear 18 by the torsion spring 17a, and the gear 18 moves the rack 15 forward.

The slide plate 14 is formed with three guide grooves 14 b and l 4 C in a direction perpendicular to the guide groove 11b, into which the pins 19a and 2Qa of the two holder plates 19.20 are slidably inserted. The racks 19b, 20b of the holder plate 19.20 mesh with a gear 21 pivotally supported by the slide plate 14.

A spring 20c is installed between the holder plates 19 and 20, and when the holder plate 19 attempts to move in one direction by sliding the pin 19a in the guide groove 14b, the movement is reversed by the gear 21. is transmitted to the holder plate 20 as a movement.

Therefore, due to the relative movement of the holder plates 19, 20,
They can be close together or far apart.

A support shaft 14d is provided upright on the slide plate 14, and a swing plate 22 having pins 22a and 22b is rotatably fitted onto the support shaft 14d.

The pin 22a is inserted into the cam hole 15C of the rack 15, and the pin 22b is inserted into the long hole 19c of the holder plate 19.

Therefore, the rack 15 moves relative to the slide plate 14,
When the swing plate 22 is rotated by the cam hole 15C, the holder plates 19, 20 move closer to each other or move away from each other.

Further, a support shaft 14e is erected on the slide 1ffl14, into which a lock lever 23 is rotatably inserted, and when the protrusion 23a of the lock lever 23 is fitted into the cam groove 15d of the rack 15. The protrusion 23b of the lock lever 23 is connected to the guide plate 2 fixed to the main base 11.
It can be slid along one side of 4.

Therefore, when the rack 15 moves, the lock reno)-23
Since the protrusion 23a is fitted into the cam groove 15C of the rack plate 15, the sliding plate 14 and the hook 15 move in conjunction with each other. Then, when the slide plate 14 moves and the protrusion 23b of the lock lever 23 separates from the guide plate 24, the protrusion 23a of the lock lever 23 and the cam groove 1 of the lock plate 15
Since the engagement with 5c is released, the movement of the slide ff14 is stopped. Furthermore, only the rack board 15 has a switch 40.
is operated and the motor 16 advances until it stops.

The excess rotation of the motor 16 after the rear end of the guide groove 15a of the rack 15 hits the slide plate 14 and is prevented from moving is prevented by winding the torsion screw 17a of the guide groove 15. Preventing damage.

A spring 23C is installed on the lock lever 23 in a direction in which the protrusion 23a fits into the cam groove 15d.

Main chassis 2 with the compartment 8 attached
5 is attached with a motor 26, and the rotation of this motor 26 is transmitted to the final gear 27 via several stages of reduction gears.

This terminal gear 27 is loosely fitted on the shaft 28, and this shaft 28
Two belt gears 29a and 29b are fixed to the.

A torsion spring 28a is installed between one belt gear 29a and the final gear 27.
The rotation of the belt gear 2 is performed via the torsion spring 28a.
t depends on rotating 9a and 29b.

Belt gears 30 are provided above the belt gears 29a and 29b in correspondence with each other, and a cog bell 31 is installed vertically between them, and the gripping portion lid of the main base 11 is attached to the cog belt 31.

Therefore, when the motor 26 rotates, the belt gear 29a,
29b is rotated to drive the full-length belt 31, and the main base 1 attached to the full-length belt 31 moves up and down along the guide bar 13.

In addition, a slit plate 32 is provided on the main shear 25 and is provided with slits 32a for each guide groove 8a of the compartment 8. A sensor 32b is provided to control the rotation of the motor 26.

Furthermore, the tape of the tape cassette A is wound on the main ear 725, and the tape of the tape cassette A is pulled out by the hent drum 33, which records and reproduces signals using a magnetic head provided on the main ear 725 while rotating. The tape drive mechanism includes a guide post, a capstan, a pinch roller, a reel stand, an opener for the lid A2 of the tape cassette A, and the like.

Then, tape cassette 8 loaded in carrier l,
carrier l by a certain distance from compartment 8,
A light emitting diode 34a for detecting the presence of the tape in the cassette when the tape is pulled out, and a phototransistor 34b for receiving this light are located above and below the main shear 25.
They can be attached as a pair.

Next, the operation of this device will be explained.

Slide the slider A1 onto each carrier l as described above, and with the lid A2 unlocked,
When the tape cassette A is loaded from the front side, the cover plate 35, which is pivotally supported above each guide 18a of the compartment 8, is pushed up by the carrier 1.

As shown in FIGS. 11 and 12, the holder plates 19 and 20 are separated from each other, and the holder portion 19 at the tip thereof is
d and 20d are separated by the recessed portion 3e of the carrier 1.

In this state, what number, for example, 3rd from the top, for this device?
When a command is given to play tape cassette A),
When the sensor 32b reads the slit 32a, the main base 11 is raised and lowered by the rotation of the motor 26.
The motor 26 stops when the holder parts 19d and 20d are at the same height as the recessed part 3e of the third key r')a1.

Following this stop, the motor 16 starts rotating and ranks 1.
5 toward the top of the first ↓ diagram.

At this time, since the protrusion 23b of the lock lever 23 is rested at the end of the guide plate 24, the slide plate 14 cannot move together with the rack 15, and the rack 15:
It will move relative to the slide plate 14.

Therefore, the pin 22a of the rocking plate 22 is guided by the cam hole 15C, the rocking plate 22 rotates, and the pin 22b moves the holder plates 19, 20 closer to each other.
The holder parts 19d and 20d are connected to the recessed part 3 from both sides of the key holder 1.
inserted into e.

Due to this insertion, the upper bottle 7 that had been protruding into the recess 3e
b is pressed, and the lower pin 7c is inserted into the hole 8b of the compartment 8.
Remove it from compartment 8 and move it to compartment 8.
will be unlocked.

When the cam groove 15d reaches the position of the protrusion 23a of the lock lever 23 due to the movement of the rack 15 with respect to the slide plate 14, the protrusion 23a engages in the cam groove 15C by the bias of the lock lever 223C, and the rack 15 and the slide plate 14 are in a state of interlocking movement.

In addition, the lock lever 23 is rotated by the engagement of the protrusion 23a into the cam groove 15d, and the protrusion 23b is disengaged from the end of the guide plate 24, so that the slide plate 14 and the rack 1
5 will now move together.

Moreover, during the movement, the protrusion 23b comes into contact with the guide plate 24, preventing the lock lever 23 from rotating, and the holder 11
The carrier holding by 9d and 20d continues, and this progress is shown in FIGS. 13 to 16.

In this manner, the upper protrusion 3c of the carrier 1 held by the holder plates 19, 20 is pulled out from the guide groove 8a of the compartment 8 toward the rear side by the movement of the slide plate 14.

By removing the carrier 1, the lid plate 35 that had been pushed up by the carrier 1 hangs down from the removed portion i of the guide groove 8a, and the portion corresponding to the guide groove 8a is
This prevents you from inserting another tape cassette (A).

Also, when the carrier 1 is removed, the pressure of the carrier 1 against the slide piece 9 is removed, so the slide piece 9 is pushed by the spring 9a, and the switch 10 is pressed to turn it on and the number of carrier i in the compartment 8 is removed. It is possible to memorize something.

Then, after a certain period of time has passed after this switch 10 turns ○X, the carrier 1 is loaded and the holder plate 19.20 is loaded.
The tape cassette A held by the light emitting diode 3
1a and phototransistor 34. It is transported during the period b.

At this time, if the phototransistor 34b receives the light from the light emitting diode 34a, the tape cassette A can be loaded into the carrier 1.

The light received by the phototransistor 34b is controlled by the control circuit 36.
The control circuit 36 determines that the tape cassette A is not loaded in the kitchen rear l, and returns the kitchen rear l to the compartment 8.

This returning operation is performed in the same manner as returning the tape from the tape drive mechanism to the compartment 8, which will be described later.

If the phototransistor 34b does not receive light,
It is determined that carrier 1 is loaded with tape force set A), and 1. ! ! The control circuit 36 is the motor drive circuit 3
7, the motor 16 continues to rotate, the carrier I continues to move, the tape cassette A is pressed onto the tape drive mechanism as described later, and the switch 39 described later is turned on.

When this movement of carrier l reaches a predetermined position,
The switch 38 is pressed by the slide plate 14 as shown in FIG. 10, and the switch 38 is turned on.

When the switch 38 is turned on, the control circuit 36 causes the drive circuit 41 to stop the motor I6, and the motor 26 rotates to drive the full-body belt 3I and lower the main base 11.

This lowering of the main base 11 causes the holder plate 19.2 to
The tape cassette A of the carrier 1 held at 0 is lowered to reach the top of the main chassis 25, the lid A2 is opened by a lid opener, and the tape cassette A is set in the tape drive mechanism.

When the carrier 1 is lowered to such a position, the carrier 1 presses the switch 39 shown in FIG. 2 to turn it on.

After this switch 39 is turned on, the motor 26 rotates for a certain period of time, and then the motor 26 is stopped.

Due to this extra rotation of the motor 26, the torsion spring 28a is wound, and the biasing force due to the winding is transmitted to the main base 11 via the cog belt 31 to press the tape cassette A against the tape drive mechanism. This completes the set.

In this way, when the recording or playback of the set tape cassette A is finished, or the recording or playback to another tape cassette is commanded, the motor 26 rotates and the switch IO is turned ON. 8 guide groove 8a
The main base 11 is raised to a height at which the sensor 32b detects the slit 32a corresponding to the main base 11.

This height is the same as that of the guide groove 8a of the compartment 8.
This is the position where the heights of the upper protrusions B3C of the carrier l being held are equal.

Upon detection by the sensor 32b, the motor 26 is stopped, and after the height of the main base 11 is fixed, the motor 1 is stopped.
6 rotates to move the rack 15 towards the compartment 8.

Since the slide plate 14 is also linked to this movement of the rack 15, the carrier l held by the holder plate 19.20 is
Moreover, the protrusion 3C is returned into the guide groove 8a.

Then, the carrier 1 pushes the slide piece 9 against the spring 9a, so the slide piece 9 moves away from the switch 10, turning it OFF, so that the carrier 1 moves into the compartment 8.
It can be determined that it has been returned to

At this point, the slide plate 14 is as shown in FIG.
It hits the folded part 11c of the main base 11 and becomes unable to move any further, and the protrusion 23b of the lock lever 23 reaches the end of the guide plate 24, and the long lever 2
3 is in a rotatable state.

Therefore, the rack 15 is attached to the protrusion 23 of the lock lever 23.
While removing a from the cam groove 15d,
and rotate the bin 22a of the swing plate 22 into the cam hole 15.
c to rotate the swing plate 22'.

The rotation of the swing plate 22 is controlled by the holder plate 19 by the pin 22b.
．． 20 in a direction that separates them, and the holder parts 19d, 2
0d comes out from the recessed part 3e.

As a result of this removal, the back side of the holder portion 20d presses the switch 40, turning it on and determining that the return of the carrier (2) has been completed.

The release of the carrier 1 by the holder parts 19d and 20 (l) causes the holder part 19d to release from the upper pin 7b.

20d is no longer pressed, the lower pin 7C of the lock bin 7 is inserted into the hole 8b by the bias of the spring 7a, and the carrier 1 is locked in the compartment 8.

Furthermore, if it is necessary to set another tape cassette A in the tape drive mechanism, the motor 26 rotates until the sensor 33 detects the slit 32a corresponding to the carrier l in which the tape cassette A is loaded. , the main base 11 is raised and lowered.

Thereafter, the tape force set A is set in the tape drive mechanism in the same manner as described above.

This cassette auto change device has the above-mentioned configuration,
When the carrier 1 holding the tape cassette A is about to return from the tape drive mechanism to its original position in the compartment 8, it passes between the light emitting diode 34a and the phototransistor 34b; - Sometimes the phototransistor 34b is shielded from light.

To explain this using the time chart of FIG. 18, in case of ■, ejection is started and the switch 39 is turned OFF+:! : When the start of ejection is detected, the phototransistor 34b is shielded from light by the tape cassette A, and when this is detected, the release of the light shielding is detected when the tape cassette A passes. 2 indicates the time when the ejection is completed and the completion of the ejection is detected by the switch 40 (○X).

In this time chart, the time T between ■ and ■ is
[The time T between ~■, is a very small time compared to the time T between I~■.

On the other hand, the phototransistor 34b may continue to be shielded from light, and the time T may become extremely long.

That is, the slide piece 9 is pushed by the spring 9a and the switch 10
If the switch 10 is not turned ON, the position of the loaded carrier 1 may become unknown or the slit 32a may become clogged, causing the sensor 3
2b cannot be detected, the stopping position of the main base 11 by the cog bell 31 may change.

Then, at that position in the compartment 8, there is another carrier 1, a tape cassette loaded in this carrier 1,
Because of this, the carrier 1 and its tape cassette A that are being ejected hit this, and the slide plate 14 becomes unable to move toward the compartment 8.

At this time, the phototransistor 34b is shielded from light by the tape cassette A that is being ejected, and the slide plate 14 is in a clinch state.

To release this, the control circuit 36 connected to the phototransistor 34b operates according to the flowchart of FIG. 19.

As step S, when an eject instruction is given,
The motor 26 rotates, the carrier l rises, and the switch 3
9 is turned off, the start of ejection is detected in step S2.

Next, it is determined in step S3 that the time elapsed by adding the margin time α to the time T shown in FIG. .

When no abnormal current is detected, the phototransistor 34
b determines that light is blocked in step S, and returns to step S if light is not blocked.

When this operation is repeated and light shielding is detected in step S5, the process proceeds to step S6, where it is determined whether the time obtained by adding the margin time α to the above T has elapsed, and if the time has not elapsed, the process proceeds to step S7. Detection of abnormal current in motors 26 and 16 is determined.

If no abnormal current is detected, the process returns to step S6 and repeats step 5s=St.

Then, in step S6, when it is determined that the time T, ↓α has passed, in step S8, the phototransistor 34
If the light is not blocked, that is, the tape cassette A has finished passing, it is determined that the eject operation by ○X of the switch 40 is completed as step S, and the operation of this flowchart is ended as step S12. .

However, in this step S9, the switch 10 is
If the eject operation is not completed and the eject operation is not completed, the first
It is determined in step 510 that the time elapsed by adding the margin α to the time Te shown in FIG.

If this is not detected, the process returns to step Ss and repeats steps 39 to SI+.

In step S3, the time T, +α has elapsed, or in step S4. 5? , motor 2 in S++
6 and 16, or the phototransistor 34b does not turn on in step S8 and continues to be blocked from light.
Alternatively, when the time Tc÷α has elapsed in step 510, a countermeasure operation against the clinch, such as redetection of the position to which the carrier 1 should return, is commanded.

〔Effect of the invention〕

As described above, in the present invention, since the detection means for detecting light blocking when the tape cassette returns to the loading position is set based on the light blocking time at that time, the light blocking time is short.

The light-shielding time fluctuates less because the speed at which the tape cassette passes through the detection means fluctuates less due to external conditions, and therefore, the extra time added to the light-shielding time can be reduced.

Therefore, the time required for judgment by the detection means can be extremely shortened, and abnormalities such as clinch can be quickly detected and countermeasures can be taken quickly.

Further, since it is sufficient to provide one pair of the detection means for the plurality of holding means, and the determination can be made only by the program of the control circuit, the configuration can be simplified, such as eliminating the need for a special circuit.

Furthermore, since detection is performed by blocking light from the detection means, it is possible to identify the location where an abnormality occurs.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an overall plan view, FIG. 2 is a side view thereof, FIG. 3 is a front view thereof, FIG. 4 is an exploded perspective view of the carrier, and FIG. 5 , Figure 6 is a side view of the process of loading the tape cassette into the carrier, Figure 7 is a front view of the compartment holding the carrier, Figure 8 is the opposite side view showing the installation of the main base, and Figure 9 is the main base. Fig. 1O is a plan view of the slide plate when it is in its most moved position, Fig. 11 is a plan view of the holder plate in its standby state, Fig. 12 is its front view, Fig. 13 is its side view, Fig. 14 is a plan view of the holder plate starting to hold the carrier and partway through release; Fig. 15 is a side view thereof; Fig. 16 is a plan view of the holder plate holding the carrier; Fig. 17 is a circuit diagram of the control circuit. , FIG. 18 is a time chart of the eject operation, FIG. 19 is a flow chart of the control circuit according to this, and FIG. 20 is a conventional flow chart. A Tape cassent, 1 Carrier, 3 Side body, 3C Upper protrusion, 3e Recess, 7 Lock bin, 7a, Upper pin, 7c... Lower bottle, 8...
- Compartment, 8a... Guide groove, 8b... Hole, 9... Slide piece, 10.38, 39, 40...
Switch, 11...Main base, 14...Slide plate, 15...Rack, Engineering 5C...Cam hole, 15d...
...Cam groove, 16,26...Motor, 19,20...
・Holder plate, 1ga, H)a...Holder part, 21.Gear, 22..Swing plate, 23..Lock lever-31.
...Cog belt, 32...Slit plate, 32a...
Slit, 32b...Sensor, 33...Head drum, 36...Control circuit.

Claims (1)

[Claims] A holding means for holding a tape cassette inserted in a horizontal direction, a supporting means for supporting a plurality of the holding means arranged in a vertical direction, and the holding means is extracted from the supporting means and the tape cassette is conveyed to a tape drive mechanism. a loading means for detecting light blocking, a detecting means for detecting light blocking provided as a pair above and below the supporting means on the back side of the tape cassette loaded in the holding means supported by the supporting means, and a light blocking time for the detecting means. 1. A cassette automatic change device for a tape player, comprising: control means for operating a countermeasure means when the light shielding time is longer than the light blocking time during loading.