JPH03222144A - Automatic cassette changing device for tape player - Google Patents

Abstract

PURPOSE:To prevent a fault caused by the deviation of the stopping position of a conveying means by stopping the conveying means within a position display means after the position display means corresponding to a desired tape cassette holding means is allowed to pass, to be inverted, to pass and to be inverted again by using a sensor by means of a control circuit. CONSTITUTION:A carrier 1 being a holding means holds a 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 so as to select the desired carrier 1 and convey it to a tape driving mechanism provided on a main chassis 25. A slit plate 32 where a slit 32a is provided corresponding to the guide groove 8a of the compartment 8 is erectly provided on the main chassis 25, and the sensor 32b for reading the slit 32a is provided on the main base 11. In the case of selecting the carrier 1, the control circuit stops the main base 11 within the width of the slit 32a after the slit 32a is allowed to pass once and pass again in an opposite direction.

Description

[Detailed Description of the Invention] Industrial Application Field] The present invention is designed to provide a tape cassette that is loaded with a plurality of tape cassettes, selects one of them, sets it in a tape drive mechanism, and performs recording and playback of the tape cassette. The present invention relates to an improvement in an automatic cassette change device for a tape player that can return this tape cassette to its old position and set another tape cassette in a tape drive mechanism.

[Conventional technology]

In the conventional cassette automatic change device 1 of this type of tape player, a plurality of tape cassettes are loaded in a row, and when a conveying means moves from one direction to another, the stop position changes. Select a tape cassette, carry it and set it in the tape drive mechanism.

When the recording and playback of the tape cassette is completed, the conveying means moves, stops at the position where the tape cassette was, and returns it to the loading position.

A motor is used as the driving force for the movement of the conveyance means, and an interlocking mechanism of gears and levers; thus, the conveyance means is moved.

And specific? The structure has multiple slits corresponding to the loading positions of multiple tape cassettes.
This was read by a sensor such as a photocoupler, and the rotation of the motor was controlled through a control circuit.

Next, FIG. 22 shows a flowchart of a control circuit for stopping the conveying means that moves upward (5).

In this flowchart, when an upward movement command is issued to the conveyance means in the first step S21, the motor is rotated so as to move the conveyance means upward in step S2□.

In step S23, the rise of the voltage is detected by reading the lower side of the slit using the photocoupler, and step S23 is repeated until the input is received, and if the reading is received, the process advances to step S24. It is determined whether the slit is at the desired N-th slit, and if the N-th slit is not reached, the process returns to step S23 and repeats this process.

When it is determined in step S24 (5) that the target slit is the Nth slit, the rotational direction of the motor is reversed and the rotational speed is reduced in step S2S.

Then, in step S2G, the fall of the voltage is detected by passing through the lower side of the slit of the photocoupler, and this step 526 is repeated until there is enough human power.

When this input is received, the process proceeds to step 327, where the motor is rotated again at a low speed in reverse, and at step 528, the photocoupler repeatedly detects the rise of the voltage due to the lower side of the socket.

When this rise is detected, the motor is stopped in step Szs, and the conveying means is stopped and the process proceeds to step S3o.
, this operation ends.

[Problem to be solved by the invention]

The movement of the photocoupler with respect to the slit due to the above-mentioned operation is predicted as shown in FIG. In such a case, as shown in FIG. 24, the photocoupler must pass through the desired slit position and stop at the upper slit position, and the conveying means can be stopped at the desired position. Sometimes.

That is, after the photocoupler detects the rise of the voltage due to the voltage passing through the lower side of the slit in step S24 described above, the transport Before the means is reversed, a fall in the voltage due to passing the upper side of the slit is detected (step 526), and the motor is reversed again and the conveying means continues to move upward until reaching the upper slit, and the step The slit detected at 328 ends up being the lower side of the slit of the superior player. Therefore, the transfer means may stop at the upper slit position. Therefore, there are disadvantages in that it is not possible to increase the number of cassettes by increasing the number of stages, and it is not possible to increase the speed of the conveyance means to exchange cassettes as quickly as possible.

[Purpose of the invention 2 This invention solves the above-mentioned problem with the conventional cassette automatic change device, and stops the conveying means within the display area of the correct position display means even if there is a delay due to inertia, speed, time difference, etc. The purpose is to prevent any kind of trouble caused by the incorrect stopping position.

[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, and the present invention relates to a means for an automatic cassette change device for a tape player, which corresponds to the position of the holding means supported in a vertical line on the support means. The conveyance means for conveying the tape cassette of the holding means to the tape drive mechanism is provided with a sensor for reading the position display means, and a control circuit causes the sensor to pass through the position display means, reverse, pass through the position display means again, and after reversal, display the position display means. By stopping within, the purpose is achieved.

Second Embodiment 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 dental audio tape player shown in FIGS. 1 to 19.

FIG. 4 shows the carrier 1 of the tape casseno hA, which is a holding means, and the second carrier 1 consists of a bottom plate 2, a side body 3, and a top plate 4.
, is formed into a picture shape with openings at the front and back by the presser plate 5).

The bottom plate 2 is formed with a projecting piece 2a and a raised part 2b, and when the tape cassette A is inserted through the front opening of the carrier 1, the raised part 2a unlocks the slider AI of the tape cassette A.

Next, the front end of the slider A1 hits the projection 2a and is pushed backward, and the slider A moves to unlock the lid of the tape cassette A and expose the reel hole of the tape cassette A. .

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 wound around the pin 5b.
The tip of the presser plate 5 is urged downward.

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 carrier 1 is loaded with a tape cassette, the presser plate 5 hangs down due to the biasing force of the spring 3c.

When the tape cassette (A) is loaded into the key 1 from the state shown in FIG. 5 as 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 holding the tape cassette by the carrier l. to ensure that.

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. .

The outer surface of the side 1$3 is formed with an upper protrusion 3C and a lower step 3d. bottle 7
C protrudes from the lower stage 1ff13d.

As shown in FIGS. 2 and 7, the compartment 8, which is a support means, is erected on both left and right sides, and has a plurality of horizontal guide grooves 8a, for example, five, arranged in a row in the vertical direction. It has been established 5).

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

The lower bin 7C protruding from the lower part 3d is:
The carrier l is locked in the compartment 8 by being inserted into the hole 8b below the guide groove 8a of the compartment 8.

In this compartment 8, a slide piece 9 that can be slid in the front and back direction and a switch 10 are installed on the sides of each guide groove 8a. The slide piece 9 is provided with a spring 9a that urges the slide piece 9 backward, and the upper protrusion 3C of the rear 1
is accommodated in the guide groove 8a and the lower pin 7C is engaged in the hole 8b (5), the slide piece 9 is pushed by the carrier 1 against the spring 9a, and the slide piece 9 is separated from the switch lO. There is.

However, the lower bottle 7C was pulled out from the hole 8b and the rear bottle 1
When the slider slides backward through the guide groove 8a, the slide piece 9
is pushed by spring 9a and slides backward, switch 10
Press.

The second pressed switch 10; = Therefore, 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 2 is fixed to the main base 11, which is the base of the extracting means, and the second slide tube 12 and the guide hole 11a move vertically on the guide bar 13, respectively. Slidable: Since the main base 11 is fitted in this way, it can be moved up and down.

As shown in FIG. 9, this main base 11 is formed with three longitudinal guides i'jtllb, into which the pins 14a of the slide plate 14 are inserted, so that the slide plate 14 It is slidable in the front and rear directions with respect to the main base 11.

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

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 ■8 coaxial with this final gear 17.
A torsion spring 17a is installed between the gear 18 and the rack 15, and the gear 18 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 guides 114b and 14c in a direction perpendicular to the guide groove 11b, into which the pins 19a and 20a of the two holders i19.20 are slidably inserted, and the holder plate 19.20 rack 1
9b and 20b are gears 2 pivotally supported by the slide plate 14
It meshes with 1.

A spring 20c is installed between the holder plates 19 and 20, and when the holder plate 19 tries 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 1f19.20 approaches or moves away.

Further, a support shaft 14e is erected on the slide plate 14, and a lock lever 23 is rotatably inserted into the support shaft 14e.
When the lock lever 23 is inserted into the lock lever 23, the other protrusion 23
b can slide along one side of a guide plate 24 fixed to the main base 11.

Therefore, when the rack 15 moves, since the protrusion 23a of the lock lever 23 is fitted into the cam a15C of the rack plate 15, the slide plate 14 and the rack 15 move in conjunction with each other. Then, the slide plate 14 moves and the lock lever 2
When the protrusion 23b of No. 3 separates from the guide plate 24, the protrusion 23a of the lock lever 23 and the cam groove 15c of the lock plate 15
Since the engagement with the slide plate 14 is released, the movement of the slide plate 14 is stopped. Further, only the rack plate 15 is moved until the switch 40 is operated and the motor 16 is stopped.

Is the motor 16 redundant after the rear end of the guide groove 15a of the rack 15 hits the slide plate 14 and is prevented from moving? Two rotations: Damage to the guide groove 15 is prevented by winding the torsion spring 17a.

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, and a torsion spring 28a is installed between the one belt gear 29a and the final gear 27.
The rotation of the belt gear 2 is performed via the torsion spring 28a.
9a and 29b will be rotated.

Belt gears 30 are provided above the belt gears 29a and 29b in correspondence with each other;
This full-length belt 31 is constructed, and the main base 11's support 111d is attached to the second full-length belt 31.
Ru.

Therefore, when the motor 26 rotates, the belt gear 29a,
29b is rotated to drive the cog belt 31, and the main base 11 attached to the cog belt 31 moves up and down along the guide bar 13.

Further, a slit plate 32 in which slits 32a are provided for each guide groove 8a of the compartment 8 is provided in the main shear 25, and the main base 11!
:jt, this slit 32aG4: is provided with a sensor 32b which controls the rotation of the motor 26 thereby.

Further, on the main shear 25, a tape is wound onto a tape cassette, and while it rotates, a magnetic head provided on this drum records and reproduces signals. The tape drive mechanism is provided with a tape drive mechanism such as an illustrated guide post which is wound around the head drum 33, a capstan, a pinch roller, a reel stand, and an opener for the lid A2 of the tape cassette A.

Then, tape cassette A loaded in carrier L,
carrier 1 by a certain distance from compartment 8,
A light emitting diode 34a for detecting the presence of the tape cassette A when the tape cassette A 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.

Each carrier 1 has a slider A,
With the lint A2 unlocked, load the tape cassette A from the front side.

At this time, the cover plate 35, which is pivotally supported above each guide groove 8a of the compartment 8, is pushed upward.

As shown in FIGS. 11 and 12, the holder 1f19.20 is in a separated state, and the holder parts 19d and 20d at the tips have been pulled out of the recessed part 3e of the carrier 1 and separated. .

In this state, for the second device, what number, for example, upper 3
When a command is given to play the tape cassette A in the row,
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 holders fi19d, 20d are at the same height as the recess 3e of the third carrier 1.

Following the second stop, motor ■6 starts rotating and rack 1
5 toward the top of FIG.

At this time, the protrusion 23b of the lock lever 23 is rested at the end of the guide plate 24, so the slide plate 14 cannot move together with the rack 15, and the rack 15 moves relative to the slide plate 14. Will have to move.

Therefore, the pin 22a of the rocking plate 22 is kited by the cam hole 15C, the rocking plate 22 rotates, and the pin 22b moves the Holter plates 19, 20 closer to each other.
The holder parts 19d and 20d are recessed +1 from both sides of the kitchen rear l.
Inserted in 3e.

By this insertion, the upper pin 7b protruding into the recess 3e is pushed, and the lower bottle 7C is pushed into the hole 8 of the compartment 8.
Remove carrier 1 from compartment 8 from compartment b.
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 5 relative to the slide plate 14, the protrusion B23a engages in the cam groove 15c under the bias of the spring 23C. , 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 23H 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, and the rotation of the lock lever 23 is prevented, and the holder part 1
The carrier holding by 9d and 20d continues, and this progress is shown in FIGS. 13 to 16.

In this way, the carrier 1 held by the holder plate 19.20 is moved so that the upper protrusion i3c is moved from the guide groove 8a of the compartment 8 to the rear side j by the movement of the slide plate 14.
This is taken out.

By removing this carrier (2), the cover plate 35 that was not pushed up by the carrier 1 hangs down in the removed guide groove 8a, and another tape force set A) is applied to the part corresponding to this guide 1I8a. It prevents it from being inserted.

Furthermore, when the carrier 1 is removed, the pressure of the carrier l against the slide piece 9 is no longer i, so the slide piece 9 is pushed by the spring 9a, and the switch lO is pressed to turn it on and the carrier l of the compartment 8 is It is possible to remember whether or not it has been removed.

When this switch 10 is turned on and a certain period of time has elapsed, the carrier 1 is loaded and the holder plates 19, 20 are loaded.
The tape cassette A held by the light emitting diode 3
4a and the phototransistor 34b.

At this time, if the phototransistor 34b receives the light from the light emitting diode 34a, it means that the tape cassette A is not loaded in the carrier 1! evening.

The light received by the phototransistor 34b is controlled by the control circuit 36.
The control circuit 36 operates according to the flowchart shown in FIG.

That is, since the holder parts 19d and 20d hold the carrier 1, they are separated from the switch 40, which will be described later, and the switch 40 is turned off.
The half-loading that becomes FF is referred to as step S1.

Then, the state where the switch 10 is set to ○X is set as step S2, and the elapse of a certain period of time is set as step S3.
Judging as.

In this step S3, when it is determined that a certain period of time has elapsed, the phototransistor 34b switches the light emitting diode 3
In step S4, it is determined whether or not the light 4a is being received.

In step S, when the phototransistor 34b has not received light, it is assumed that the tape force set) A is not loaded on the carrier 1, and in step S5, the motor 1
6 is operated, the motor 16 is reversely rotated, and the carrier 1 is returned to the compartment 8.

Therefore, as shown in the operating line (■) in Figure 19, compared to the conventional operating line H, which determines when the tape cassette is set in the tape drive mechanism, the distance and time required to return the tape are greatly shortened. can.

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,
As step S6, set the tape force on the carrier 1)A
It is determined that the tape cassette A is loaded, and the control circuit 36 causes the motor drive circuit 37 to continue rotating the motor 16 and move the carrier 1 as it is, and as described later, the tape cassette A is pressed onto the tape drive mechanism, and the cycle ends at step S7 by turning on a switch 39, which will be described later.

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.

In response to the ○X of this switch 38, the control circuit 36 causes its drive circuit 41 to stop the motor 16, and the motor 26 rotates to drive the cog bell (31) to lower the main base 11. As a result, the tape cassette A of the carrier 1 held on the holder plate 19.20 is lowered and reaches the top of the main chassis 25, and the lid A2 is opened by the lid opener, and the tape cassette A is set in the tape drive mechanism. It is.

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

After the 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 wokoku belt 31, pushing the tape force A to the tape drive mechanism ( As you do, that cent is what you complete.

In this way, when the recording and playback of the sent tape cassette A is finished, or the recording and playback of another tape cassette 7) A is commanded, the motor 26 rotates and the switch 10 is turned on. Guide groove 8a of compartment 8
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 a position where the heights of the upper protruding portions 3C of the carrier 1 being held are equally variable.

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

Since the slide plate 14 also moves in conjunction with this movement of the rack 15, the upper protrusion 3c of the knife 1 held by the holder plate 19.20 is returned into the guide groove 8a.

Then, the carrier t pushes the slide piece 9 against the spring 9a, so the slide piece 9 moves away from the switch 1° and turns it off, so 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 moved as shown in FIG.
It hits the girder lower 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 lock 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, remove the long lever 23.
and rotate the bin 22a of the swing plate 22 into the cam hole 15.
c to guide and rotate the swing plate 22.

At that time, the rotation of the movable plate 22: by the pin 2H), the Holter plate 1
9.Move 20 in the direction to separate them, and then move the holder part 19d,
20d 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 I has been completed.

The carrier part 19d is released from the upper bottle 7b by the holders 11oa and 2oa.

21] The pressure on d is removed, and the lower bin 7 of the lock bin 7
C is inserted into the hole 8b by the urging of the spring 7a,
Kimaria ■ is in compartment 8; this is locked, and another tape cassette A is connected to the tape drive mechanism)
If necessary, the main base 11 is raised and lowered by the rotation of the motor 26 until the sensor 32b detects the slit 32a corresponding to the carrier 1 loaded with tape force set A).

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

This Cassent automatic chain system is configured as described above.
The slit 3 of the slit plate 32
A sensor 32b for reading 2a is formed by a photocoupler sandwiching the slit plate 32.

Then, the main base ■1 is driven by the motor 16,
Required Su! When stopping at position 32a, the motor 26 and its reduction gear, the cog belt 31 and the belt gear 2
In order to prevent the stop position from changing depending on the direction of movement due to the lash of engagement with 9a and 29b,
The control circuit 36 always moves the main base 11 upward and then stops.

When the main base 11 is moved upward, the control circuit operates according to the flowchart in FIG. 20.

In this flowchart, the main base 11 is connected to the motor 26.
Step S1 begins with instructing rotation in a direction to move the image upward.

With this command, the motor 26 starts rotating twice in that direction as step S2, and the sensor 3
2b passes through the slit 32a, and the detection of the rise in voltage is started.

While there is no detection (well, step S3 is repeated, but if there is detection, it is determined in step S4 whether or not it is the target N-th slit 32a, and the previous In the case of slit 32a, this is the steering knob,
1) Repeat 3 pS<.

In step S4, when it is determined that the target slit is the I will do it.

After the detection is made in step S5, step S6
As a result, the motor 26 is reversely reversed and decelerated.

Thereafter, in step S7, the rise of the voltage due to the sensor 32b passing through the slit 32a in the opposite direction is detected, and if this is detected by repeating this process, the fall of the voltage due to the end of the passage is detected in step S8. Start detection as .

When this is detected, the motor 26 is slowed down and reversed in step S9, and detection of the rising edge of the sensor 32b entering the slit 32a is started in step 310, and this process is repeated.

When this is detected, the motor 26 is stopped and this flowchart ends.

The operation of the sensor 32b with respect to the slit 32a according to this flowchart is shown in FIG. 21, and the step positions corresponding to the movement are marked.

〔Effect of the invention〕

As described above, when the conveying means approaches the position of the holding means loaded with the desired tape cassette from a predetermined side and stops, after passing the position display means, The tape cassette decelerates, reverses itself, passes through it again, reverses, and stops, so even if the number of tape cassettes is increased and the slit spacing becomes narrower, or even if the transport speed is fast, the transport means will not stop. The position is accurate, and therefore, there is no possibility of selecting the wrong tape cassette due to a shift in the stop position of the conveying means, or of failures such as the tape cassette being returned colliding with the tape cassette at the loading position and causing the conveying means to be in a clinch state. It is.

[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. 10 is a plan view of the slide plate when it is at its maximum movement, 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 the circuit of the control circuit. , Fig. 18 is a flowchart of the control circuit, Fig. 19 is an explanatory diagram of its operation, Fig. 20 is a flowchart of slit detection, Fig. 21 is an operation diagram of the sensor for the slit according to this flowchart, and Fig. 22 is a conventional diagram. FIG. 23 is a diagram of the expected operation of the sensor with respect to the slit due to this, and FIG. 24 is a diagram of malfunction due to an error in the reversal position. A...Tape cassette, 1...Carrier, 3...Side body, 3c...Upper projection, 3e...Recess, 7...Lock pin, 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, 1
5-... Rank, 15c... Cam hole, 15d... Cam groove, ↓6, 26... Motor, 19, 20... Holder plate, 19d, 20d... Holder part, 21... gear,
22... Rocking plate, 23... Ronkureha-31...
Kokuheld, 32...slit 1.32a...slit, 32b...sensor, 33...to, todrum, 3
6...Control circuit.

Claims (1)

[Claims] holding means for holding the inserted tape cassette; supporting means for supporting a plurality of holding means arranged in a vertical direction;
a conveying means for conveying the tape cassette to the tape drive mechanism by moving up and down to select the holding means from the supporting means; a position display means provided in correspondence with the vertical position of the holding means; and a position display means provided on the conveying means. and a sensor that reads the position display means at least when the transport means is raised or lowered to select the position of the holding means, reads the start and end points of the position display means at the selected position, A cassette automatic change device for a tape player, comprising a control circuit for once passing the cassette, passing it again in the opposite direction, and then stopping the transport means within the width of the position display means.