JPH0441482Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a DAT cassette ejection mechanism, and in particular, in a DAT in which the cassette is manually slotted in, when the cassette is inserted for a predetermined distance or more into the DAT, the ejection mechanism This invention relates to a DAT cassette ejection mechanism in which a lever is released from a cassette, and after the cassette is carried to a predetermined position by a transport holder when ejecting the cassette, the ejection lever smoothly pushes the lid part of the cassette to eject the cassette.

In recent years, digital audio technology, which converts the recording and playback of music and other signals into digital signals, has been developed to improve the S/N ratio, frequency characteristics, distortion rate, dubbing characteristics, and random access of recorded contents. Tape recorders (hereinafter referred to as DAT) are becoming popular. DAT first became popular with home recording and playback devices, and then became popular with in-vehicle DAT.
is in the practical stage. Since this in-vehicle DAT must be operated by the driver while driving, a slot-in method is used to attach the cassette to the DAT, in which the vehicle occupant manually pushes the cassette into the DAT. In this type of DAT, it is desired that the cassette be ejected with the cassette protruding to some extent from the DAT when the cassette is ejected.

[Conventional technology]

FIG. 10 shows a cassette 1 of a conventional rotating head type DAT.

The DAT cassette 1 has a lid 2 as a front cover that can be opened and closed on the front of the cassette, as shown in Figure 10a.
A slider 3 is provided on the bottom of the cassette as a bottom cover that is movable in the front and back direction of the cassette. The lid 2 and the slider 3 are biased by a spring (not shown) in a direction to close the opening when no external force is applied.

The slider 3 has two holes 3a, 3b and two locking grooves 3g, 3h, and two locking holes 3c, 3h in each of the locking grooves 3g, 3h.
There are 3d, 3e, and 3f. When the cassette 1 is outside the apparatus, the slider 3 has lock holes 3c and 3e locked with the lock pawl 1a provided on the body of the cassette 1, so that it cannot be opened. The provided hub holes 1b, 1
c is covered by the slider 3. and,
The lid 2 is not opened when the slider 3 is closed. 1d is the bottom surface of the cassette 1 inside the slider 3.

The DAT cassette 1 configured as described above is
When inserted into the DAT, the lock pawl 1a and the lock holes 3c and 3e are first disengaged, and as shown in FIG. And the guide roller insertion hole 1e is exposed. When the slider 3 is completely opened, the lock holes 3d and 3f lock into the lock pawl 1.
a, so it cannot be closed, and in this state, the holes 3a and 3b are connected to the hub holes 1b and 1b of the cassette 1.
Overlaps 1c. Subsequently, the lid 2 of the cassette 1 is opened as shown in FIG. It is pulled out and contacts a rotating head (not shown).

Furthermore, when ejecting cassette 1 from inside the DAT, the lid 2 is closed by the spring force when the cassette 1 is moved upward, and when the cassette 1 is taken out from inside the DAT, the lock holes 3d and 3f and the lock claw 1 are closed.
When the engagement with a is released, the slider 3 is automatically closed by the spring force.

For this reason, the DAT 10 into which the cassette 1 is manually inserted is generally constructed as shown in FIG. That is, the DAT 10 has a main chassis 11 for recording and playing back the cassette 1, and a cassette 1.
The main chassis 11 is equipped with a hub 13 for running the tape inside the cassette 1, a rotating head (not shown), etc., and the cassette 1 is fitted into the sub-chassis 12 to attach the DAT 10. The transport holder 14 that moves inside the side plate 121 of the sub-chassis 12
A transport mechanism 16 including a motor 15 and a reduction gear is provided for moving the transport holder 14. This transport mechanism 16 is engaged with the transport holder 14 by a link or the like (not shown).

In this embodiment, the transport holder 14 is supported on the side plate 121 by three pins 141 protruding from the side, and the transport mechanism 16 allows the DAT 10 to be
It's starting to move around inside. Also, holder 1
A spring 143 for pressing the cassette 1 against the bottom plate 144 is provided at a predetermined location on the ceiling plate 142 of 4, and a holder 14 is provided at the front end of the bottom plate 144.
A claw 145 is provided for opening the slider 3 of the cassette 1 inserted therein. Furthermore, protrusions 146 are provided on the bottom plate 144 of the holder 14 at positions corresponding to the two lock grooves 3g and 3h provided in the slider 3 of the cassette 1, so that the cassette 1 can be inserted into the holder 14. The slider 3 is unlocked when the

FIG. 12 shows how the cassette 1 is guided within the DAT 10 by the transport holder 14 to the recording/reproducing position. When the cassette 1 is manually inserted into the DAT 10 from the state shown in FIG.
can be opened. According to DAT standards, cassette 1
The standard stroke of slider 3 is 10.3mm,
In a slot-in type DAT 10, the cassette 1 is manually inserted at least this distance.
After the slider 3 is completely opened, when the cassette 1 is further pushed into the DAT 10, the motor 1
Switch 5 is turned on and cassette 1 is transferred to transport mechanism 1.
It is carried horizontally by 6.

FIG. 12b shows the state in which the cassette 1 has completed its horizontal movement within the DAT. A protrusion 5 for opening the lid 2 is provided in the DAT 10 below the horizontal movement path of the cassette 1 at a location where there is no problem when pulling out the tape from the cassette 1. It is located inside 2.

When the cassette 1 moves downward from the state shown in FIG.
is opened by the protrusion 5. Lid 2 is DAT1
The state in which the recording/reproducing position within 0 has been reached is shown in FIG. 5c. In this state, the lid 2 is opened by the protrusion 5 until the tape 4 can be pulled out.
The tape 4 is pulled out so as to come into contact with the rotary head 17 by a guide roller (not shown).

[Problem that the invention attempts to solve]

However, cassette 1 configured as above
DAT 1 that opens slider 3 manually.
0, the transport holder 14 that is moved inside the DAT 10 by the transport mechanism 16 does not move until the slider 3 of the cassette 1 is completely opened manually. Even when the cassette 14 is returned to the position at which the cassette 1 is inserted, the slider 3 of the cassette 1 remains in the open state. Therefore, even if the transport holder 14 carries the cassette 1 to the insertion position when the cassette 1 is ejected, the DAT
The protruding length of the rear end of cassette 1 from slider 3 is longer than when inserting cassette 1.
The stroke is shortened by the stroke, and cassette 1 is
There is a problem that it is difficult to take out from the DAT10.

Therefore, we have proposed a device that attempts to increase the length of the cassette 1 that protrudes from the DAT 10 by pushing out the slider 3 of the cassette 1 with a predetermined member after the transport holder 14 carries the cassette 1 to the initial position during ejection. However, in such a device, a new problem arises in that the spring force of the slider 3 is added to the pushing force, causing the cassette 1 to pop out too much.

This invention is based on the conventional slot-in type DAT.
This was done to solve the problem when ejecting a cassette, and when the cassette is being ejected, a predetermined lever smoothly pushes the lid of the cassette while the cassette is being carried to the initial position by the transport holder. By pushing the cassette out of the transport holder during the process of returning to the position, the ejection length from the DAT of the cassette at the time of ejection is secured, and furthermore,
The purpose of the lever is to relieve the cassette from being loaded during the cassette insertion operation.

[Means for solving problems]

The DAT cassette ejecting mechanism of the present invention that achieves the above object includes a transport holder into which a manually slotted cassette is fitted and moves together with the cassette in the cassette insertion passage of the DAT, and a ceiling portion of the cassette insertion passage. It is an ejection lever that is rotatably attached to the side, and has a groove concentric with the rotation axis on the free end side, a groove continuous to this groove in the longitudinal direction, and a groove on the lower surface that is connected to the lid of the cassette. An ejection lever provided with an engaging pin is spanned between a predetermined location on the ejection lever and a predetermined location on the ceiling, and when the cassette is inserted within a predetermined distance, the ejection lever is moved in the cassette ejection direction. A DAT cassette ejection mechanism comprising a spring biasing the DAT cassette ejecting mechanism,
A pin having a free end located in the groove is provided on the upper surface of the holder, and a cam portion is provided in a predetermined portion of the groove on the rotation axis side, and when the moving distance of the holder exceeds a predetermined value, This cam part contacts the pin of the holder in an inclined state, and the distance between the contact point and the rotation axis is shorter than the distance between the pin of the ejection lever and the rotation axis, and becomes further shorter as the holder moves. The inner concentric part of the concentric groove has a
The present invention is characterized in that a braking portion is provided that slopes from the groove side in the longitudinal direction toward the outer concentric portion.

[Effect]

According to the DAT cassette ejection mechanism of the present invention,
When a cassette is inserted into the DAT, if the transport holder enters the DAT by a predetermined distance or more, the ejection lever, which is rotatably attached to the ceiling of the sub-chassis of the cassette ejection mechanism, will move so that the cam in the groove of the ejection lever moves into the transport holder. It is rotated by being pushed by a pin provided on the top surface, and the shape of the cam portion prevents the pin protruding from the ejection lever from coming into contact with the lid of the cassette. In the process of transporting the cassette to the initial position by the transport holder during the ejection operation, just before the transport mechanism finishes moving the transport holder,
The ejection lever comes into contact with the lid of the cassette again, and thereafter a biasing force from the ejection lever biased by the spring in the direction of ejecting the cassette is applied to the cassette. At this time, the ejection lever rotates smoothly with the inside of the groove in contact with the pin of the transport holder, and as a result, the cassette is smoothly pushed outward from the initial position of the transport holder, and the DAT is placed in the state of being protruded from the holder. It is discharged outside.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1a is an assembled perspective view of the sub-chassis 12 of the DAT 10, showing the structure of an embodiment of the DAT cassette ejection mechanism of the present invention. Sub chassis 12
A transport holder 14 is installed inside the DAT 10, into which the cassette 1 is inserted and moved within the DAT 10. In this embodiment, the transport holder 14 has three pins 141 protruding from each side surface, and these pins 141 are attached to the side plate 121 of the sub-chassis 12.
The guide grooves 122 are respectively fitted into three guide grooves 122 provided therein. This transport holder 14 is
It is adapted to move along the guide groove 122 by a transport mechanism (not shown) provided between the side plates 120 and 121 in the figure.

The transport holder 14 is a hollow box slightly larger than the outer shape of the DAT cassette 1.
There are openings at the front and back for insertion. The bottom plate 144 of the transport holder 14 is provided with two protrusions 146 at positions corresponding to the two lock grooves 2g and 2h provided in the slider 3 of the cassette 1. There are two notches 3 provided on the front of the lid 2 of the cassette 1.
Two claws 145 are provided at positions corresponding to i and 3j (shown in FIG. 10a). These protrusions 146 and claws 145 are arranged so that when the cassette 1 is inserted into the transport holder 14, the protrusions 146 are attached to the slider 3.
The claw 145 functions to unlock the slider 3 and open the slider 3.

Further, the top plate 142 of the transport holder 14 has three parts for pressing the cassette 1 against the bottom plate 144 of the transport holder 14 and holding it in that state (grip) when the cassette 1 is inserted into the transport holder 14. Two springs 143 are provided to protrude inside the transport holder 14, and a pin 147 for interlockingly operating the transport holder 14 and the ejection lever 20 is provided on the upper surface of the upper plate 142. 148
When cassette 1 is transported to the recording/playback position,
This is a recess for passing the hub 13 provided in the main chassis 11 shown in FIG. 11.

On the other hand, the ceiling plate 123 of the sub-chassis 12 is provided with a guide hole 124 along the moving direction of the cassette 1, and the upper plate 14 of the transport holder 14 is provided with a guide hole 124.
The pin 147 protruding from 2 is inserted into this guide hole 124.
It is becoming embedded in the In addition, a shaft hole 12 is provided at a predetermined location on the ceiling plate 123 of the sub-seat 12.
5 is bored, and a discharge lever 20 is rotatably attached to this shaft hole 125 by a pin (rotation shaft) 18. The shaft hole 125 is the ceiling plate 1
It is located near the side plate 121 of 23, and the ejection lever 20
is wide, so the side plate 121 of the sub-seat 12
and the side plate 121 provided at the boundary between the ceiling plate 123 and the ceiling plate 123.
A slit 126 extending in the longitudinal direction allows the ejection lever 20 to protrude outside the side plate 121 and rotate.

The ejection lever 20 extends from the rotating shaft 18 toward the insertion hole of the cassette 1 of the sub-chassis 12, and has a downwardly extending pin 21 protruding from the vicinity of the distal end of the ejection lever 20. This pin 21 has a length sufficient to abut against the lid 2 of the cassette 1 inserted into the sub-chassis 12. Further, a protrusion 22 is provided between the pin 21 and the rotation shaft 18 in the same direction as the pin 21, and this protrusion 22
A spring 19 is stretched between the slit 126 provided on the side plate 121 and a protrusion 127 protruding from the ceiling plate 123 near the slit 126 provided on the side plate 121.

Furthermore, the free end side of the ejection lever 20 is provided with a
As shown in FIG.
A substantially C-shaped groove 23 consisting of a longitudinal groove 234 extending in the longitudinal direction of the lever 20 is provided continuously from the concentric groove 232 . The concentric groove 232 on the free end side of the ejection lever 20 is formed to be exactly concentric with the rotating shaft 18, but the inside of the concentric groove 232 is not concentric with the rotating shaft 18, but is formed to be concentric with the rotating shaft 18. On the other hand, the braking portion 233 is formed by protruding into the groove 23 by a portion shown by diagonal lines beyond the concentric line (shown by a broken line). This braking part 233 has a concentric groove 232
Concentric groove 232 from the direction of connection with longitudinal groove 234
In this embodiment, the braking portion 233 is inclined in two steps from the middle.

When the conveyance holder 14 is supported by the side plate 121 with the ejection lever 20 being pivotally supported by the rotation shaft 18 on the ceiling plate 123 of the sub-chassis 12, the ejection lever 20 projects from the upper plate 142 of the conveyance holder 14. The pin 147 is inserted into the groove 23 of the ejection lever 20 and then fitted into the guide hole 124 of the ceiling plate 123. Also, on the side of the ejection lever 20 on the rotation shaft 18 side, there is also a rotation shaft 1.
8 is provided with a concentric arm 24, and the protrusion 127 is inserted into a recess 25 between this arm 24 and the rotation shaft 18.

FIG. 2 is a bottom view of the sub-chassis 12 with the ejection lever 20 and the transport holder 14 attached as shown in FIG. , 127, pin 14 of transport holder 14
7. Groove 23 and guide hole 124 of ceiling plate 123
This shows the positional relationship between the two.

The rotation shaft 18 of the ejection lever 20 is located on the outside of the protrusion 22 and the protrusion 127 on which the tension coil spring 19 is stretched.
The suction force due to 9 is acting. Therefore, a force acting on the ejection lever 20 to rotate it in a counterclockwise direction (in the direction of arrow A) about the rotation shaft 18 is applied.
The ejection lever 20 has a recess 25 provided on the rotation shaft 18 side thereof, and a pin 127 protruding from the ceiling plate 123.
Because it is locked in place, it cannot rotate to the left beyond the position shown in this figure.

In the state of the ejection lever 20, the end of the groove 23 of the ejection lever 20 overlaps with the guide hole 124 provided in the ceiling plate 123, and a guide hole 124 provided in the upper plate 142 of the transport holder 14 is provided protrudingly in this overlapped portion. Contains pin 147. In this state, the pin 21 protruding from the ejection lever 20 is inserted into the conveyance holder 1.
4, and the eject lever 20
The arm 24 provided on the side of the rotation shaft 18 passes through the slit 126 in the side plate 121 and connects to the side plate 12.
It protrudes outside of 1.

A conveyance mechanism (not shown) for the conveyance holder 14 is provided in the space between the side plates 120 and 121, and this conveyance mechanism will be described later.
The switch 30 that is inserted into the DAT 10 and turns on when the ejection lever 20 rotates by more than a predetermined angle starts the transport of the transport holder 14 and removes the cassette 1.
A loading completion switch (not shown) that is turned on when loading the recording and playback cassette 1 stops the transport of the transport holder 14, and when the cassette 1 is ejected, the transport holder 14 is reversed and moved in the ejection direction. The conveyance is completed by a discharge completion switch 40 which is turned on when the conveyance holder 14 returns to the initial position.

The conveyance start switch 30 may be attached, for example, to the side plate 121 of the discharge lever 20 on the side closer to the rotating shaft 18, and an auxiliary member 241 for turning on the switch 30 may be provided on the arm 24. Further, the installation completion switch may be installed on the main chassis 11, and the ejection completion switch 40 may be installed on the sub-chassis 12 so as to be turned on at the initial position of the transport holder 14.

Next, using Figures 2 to 9, we will explain the present invention.
The operation of the DAT cassette ejection mechanism will be explained.

DAT10 equipped with the cassette ejection mechanism of this invention
2, the cassette 1 is manually inserted from the left side of the figure as shown in FIG. The cassette 1 inserted into the DAT 10 enters while being fitted into the transport holder 14 as shown in FIG. Until this state, none of the members inside the DAT 10 move.

From the state shown in Figure 3, cassette 1 is now DAT10.
When the ejection lever 20 is inserted into the cassette 1, the pin 21 of the ejection lever 20 is pushed by the lid 2 of the cassette 1.
As the cassette 1 enters, the ejection lever 20 begins to rotate in the direction of arrow B about the rotation shaft 18, and at the same time, the slider of the cassette 1 is opened by the claw 145 of the transport holder 14. Further, since the pin 147 protruding from the upper plate of the transport holder 14 is located in the groove 23 concentric with the rotating shaft 18 provided on the ejection lever 20, the ejection lever 20
It is not affected by 0 rotation.

FIG. 4 shows the state when the slider of the cassette 1 is completely opened by the claw 145 of the transport holder 14. Between the state shown in Fig. 3 and the state shown in Fig. 4, the cassette 1 has a slider stroke.
It enters the DAT 10 by 10.3 mm, and during this time, the transport holder 14 does not move due to the movement of the cassette 1. Even in this state, the pin 21 of the ejection lever 20 is in contact with the lid 2 of the cassette 1, and since the ejection lever 20 is given a rotational force in the direction of arrow A by the spring 19, the lid 2 is moved from the pin 21 in the insertion direction. is subjected to a force C opposite to that of

The cassette 1 is removed from the state shown in FIG.
is further inserted into the DAT 10, the cassette 1 and the transport holder 14 move as one, and the pin 147 protruding from the upper plate of the transport holder 14 also touches the ceiling plate of the sub-chassis 12. It moves toward the back inside the guide hole 124 provided in 123. When the cassette 1 and the transport holder 14 begin to move together, the pin 147 protruding from the upper plate of the transport holder 14 will eventually move inside the groove 23 of the ejection lever 20, as shown in FIG. The cassette 1 comes into contact with the cam part 231 provided in the
By inserting the pin 147, the pin 147 moves inside the guide hole 124 while pushing the cam portion 231.

The cam portion 231 is provided with a two-step inclination as shown in FIG. 1b, and when the pin 147 comes into contact with the cam portion 231 as shown in FIG. The cam portion 231 is always tilted. Therefore, the pin 147 pushes the ejection lever 20 so as to approach the rotating shaft 18 while sliding on the slope of the cam portion 231 when moving to the back. As a result, the pin 21 has a longer distance L2 from the rotation axis 18 than the distance L1 between the pin 147 and the rotation axis 18.
The rotational distance of the pin 21 increases, and the distance y of the movement of the pin 21 in the same direction becomes larger than the distance x of the movement of the pin 147 in the direction in which the cassette 1 enters. Therefore, after the pin 147 contacts the cam portion 231,
The ejection lever 20 rotates as the pin 147 moves, and the pin 21 gradually moves away from the lid 2.
The rotational force of the ejection lever 20 in the direction A, that is, the force C of the pin 21 in the ejection direction no longer acts on the cassette 1.

After the rotational force of the ejection lever 20 in the direction A ceases to act on the cassette 1, the rotation of the ejection lever 20 causes the auxiliary member 241 attached to the arm 24 to start the transfer start switch installed on the side plate 121. Turn on 30. When the switch 30 is turned on, the transport holder 1 is moved by a transport mechanism (not shown) provided between the side plates 120 and 121.
4 can now be moved, and after switch 30 is turned on, cassette 1 can be moved manually to DAT10.
There is no need to insert it inside.

Thereafter, when the cassette 1 and the transport holder 14 are integrated and further inserted into the DAT 10 by the transport mechanism, the ejection lever 20 rotated by the pin 147 of the transport holder 14 is placed in the state shown in FIG. That is, the projection 22 on the ejection lever 20 that locks both ends of the spring 19 and the ceiling plate 12 of the sub-chassis 12.
The rotation shaft 18 is positioned on a line connecting the protrusion 127 on the upper part of the rotating shaft 18. This state is a dead point of the biasing force of the spring 19 against the ejection lever 20,
In this state, the rotational force of the spring 19 is not acting on the ejection lever 20. When the cassette 1 and the transport holder 14 move further back beyond the dead point shown in FIG.
0 in the direction of arrow B, and even if the pin 147 is not pressed, the ejection lever 20 rotates and reaches the final rotational position shown in FIG.

FIG. 7 shows the state in which the cassette 1 has been moved by the transport mechanism and has reached a position directly above the recording and reproducing position within the DAT 10. As shown in FIG. At the position shown in FIG. 7, the transport holder 14 is lowered by the transport mechanism (toward the top of the paper in FIG. 7), and is mounted on the main chassis 11 shown in FIG. 11 for recording and reproduction.

Recording and playback are completed, and cassette 1 is transferred to DAT10.
When an operation for discharging is performed, the conveyance mechanism is reversed to raise the conveyance holder 14 from the position shown in FIG. 7, and thereafter moves the conveyance holder 14 in the discharge direction. Conveyance holder 14 when ejecting cassette 1
When the pin 147 is lifted from above the main chassis 11 by the transport mechanism, the pin 147 passes through the groove 23 of the ejection lever 20 again and enters the guide hole 12 of the sub chassis 12.
Enter into 4. Thereafter, as the transport holder 14 moves in the ejection direction, the pin 147 contacts the outside of the groove 23 as shown in FIG. 8, pushes the ejection lever 20, and moves in the ejection direction while rotating in the direction of arrow A. When the ejection lever 20 rotates and the spring 19 exceeds the dead point, the spring 19 biases the ejection lever 20 again in the direction of arrow A, so that the cam portion 231 of the ejection lever 20 comes into contact with the pin 147 again. become.

Thereafter, at the position shown in FIG. 9, the pin 21 of the ejection lever 20 biases the lid 2 of the cassette 1 in the ejection direction. In this state, the aforementioned transport start switch 30 is turned off, but the transport mechanism does not hold the transport holder 14 until the discharge completion switch 40 is turned off.
Continue transporting. When the transport holder 14 is further moved in the ejection direction from the state shown in FIG.
It comes off from the cam part 231 of No. 3, and the concentric groove 23 of the groove 23
Enter 2. Then, the ejection lever 20 becomes rotatable and attempts to rapidly rotate in the direction of arrow A due to the suction force of the spring 19. However, as described above, the inner side of the concentric groove 232 is not concentric with the rotating shaft 18, and the braking portion 2 is smoothly tapered outward.
34.

Therefore, the ejection lever 20 is braked by the rotational force by the pin 147 sliding on the tapered surface of the braking part 234 of the concentric groove 232, and smoothly rotates in the direction of arrow A to move the lid 2 of the cassette 1 in the ejection direction. Press gently. As a result, the cassette 1 is moved to the ejection lever 20.
Due to the biasing force, the pin 21 is strongly and gently pushed in the ejection direction by a distance until it comes into contact with the front edge of the transport holder 14, that is, the stroke of the slider of the cassette 1. Therefore, when the transport holder 14 is returned to the initial position by the transport mechanism and the discharge completion switch 40 is turned on at this point and the transport mechanism stops transport, the cassette 1 is returned to the transport holder 14.
Ejection is completed in the state shown in FIG. 3, where the lid 2 is located at the front edge of the container.

Due to the above-described operation of the discharge mechanism of the present invention,
When the transport holder 14 returns to the initial position during ejection, the cassette 1 is gently ejected without jumping out from the transport holder 14 by the stroke of the slider, and the amount of protrusion from the DAT 10 increases. Therefore, in the DAT 10 equipped with the cassette ejection mechanism of the present invention, the slider 3 of the cassette 1 closes during the ejection operation, and the cassette 1 protrudes a large amount from the DAT 10, making it easy to take out.

[Effect of idea]

As explained above, according to the DAT cassette ejection mechanism of the present invention, a slot-in type DAT can be ejected.
In the process of returning the transport holder to the initial position during the ejection operation, the biasing force of the ejection lever that pushes out of the transport holder by the stroke of the slider of the cassette that was manually opened during insertion is gently transmitted to the cassette. Therefore, the cassette is slowly ejected from the transport holder during ejection, and the amount of protrusion of the cassette from the DAT after the ejection operation is large, making it easy to take out the cassette from the DAT.
Further, since the biasing force of the ejection lever stops acting on the cassette from the time when the cassette enters the DAT for a predetermined distance or more when the cassette is inserted, there is an effect that the ejection lever does not become a load for transporting the cassette.

[Brief explanation of the drawing]

Fig. 1a is an assembled perspective view showing the configuration of the cassette ejection mechanism of the DAT of the present invention, Fig. 1b is a plan view of the ejection lever showing the shape of the groove of the ejection lever in detail in a, and Fig. 1c is a Fig. 2 is a bottom view of the ejection mechanism of the present invention assembled from the state shown in Fig. 1a, viewed from below the sub-chassis, and Figs. Figure 2 shows the operation of the DAT cassette ejection mechanism; Figures 10a, b, and c are perspective views showing the process of pulling out the tape from the DAT cassette; Figure 11 shows the schematic configuration of a conventional DAT. FIGS. 12a, 12b and 12c are front views showing the movement of a conventional DAT cassette within the DAT. 1...DAT cassette, 2...lid, 3...
...Slider, 4...Tape, 5...Protrusion, 10...
...DAT, 11...Main chassis, 12...Sub chassis, 14...Transportation holder, 16...Transportation mechanism, 18...Rotation shaft, 19...Spring, 20...Ejection lever, 21...Pin, 22 ...Protrusion, 23...
...Groove, 24...Arm, 25...Recess, 30...
Conveyance start switch, 40...Discharge completion switch,
120, 121...Side plate, 123...Ceiling plate, 1
24...Guide groove, 126...Slit, 127
...Protrusion, 145...Claw, 147...Pin, 23
1...Cam part, 232...Concentric groove, 233...Brake part, 234...Longitudinal groove.

Claims (1)

[Scope of Claim for Utility Model Registration] A transport holder into which a manually slotted cassette is fitted and moves together with the cassette in a DAT cassette insertion passage; An attached ejection lever, which has a groove concentric with the rotation axis on the free end side, a groove continuous with this groove in the longitudinal direction, and a pin on the lower surface that engages with the lid of the cassette. an ejection lever; and a spring that is stretched between a predetermined location of the ejection lever and a predetermined location of the ceiling plate and biases the ejection lever in the cassette ejection direction when the cassette is inserted within a predetermined distance. A cassette ejecting mechanism for a DAT equipped with a pin having a free end located in the groove on the upper surface of the holder, and a cam portion provided at a predetermined portion of the longitudinal groove on the rotation axis side. , when the moving distance of the holder exceeds a predetermined value, this cam part contacts the pin of the holder in an inclined state, and the distance between the contact point and the rotation axis is determined by the distance between the pin of the ejection lever and the rotation axis. and further shorten as the holder moves, and a braking portion is provided at an inner concentric portion of the concentric groove, and the braking portion is inclined from the groove side in the longitudinal direction toward the outer concentric portion. The DAT cassette ejection mechanism is characterized by: