JPH0329809Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a tape cassette that is equipped with a lid that opens and closes the front side from which the magnetic tape wound inside the cassette body is pulled out, and is used to play the tape cassette from the cassette insertion position. A magnetic recording and reproducing device is provided, in which the tape cassette mounted at the performance position is positioned and supported with respect to a positioning member, by lifting and lowering between positions, opening and closing the lid in connection with the lifting and lowering operations. The present invention relates to the cassette device used.

<Prior Art> Conventionally, in a magnetic recording/reproducing apparatus that uses a tape cassette as a recording medium, which opens and closes the front side from which a magnetic tape wound inside the cassette body is pulled out, a tape cassette is inserted that protrudes outward from the apparatus body. The tape cassette is transferred between the playing position of the tape cassette via a cassette holder that is supported so as to be movable up and down, and in connection with the transfer operation of the tape cassette, the lid opening operation member is used to open the tape cassette. When the lid is opened and the tape cassette is installed in a playing position, the tape cassette is supported by a pressing spring on a positioning member provided on the main body of the device, so that the tape cassette can be positioned and installed. is provided.

Conventionally, the pressing spring in this type of cassette device is formed of a long leaf spring, and the central portion is fixed so that the pressing portions that are elastically displaced on both sides are biased inwardly into the cassette holder. Elastically displaceable pressing pieces attached to the top surface of the holder and formed on both sides of the cassette holder are biased to press, and both sides of the top side of the tape cassette inserted into the cassette holder are pressed via these pressing pieces. . The tape cassette at the performance position is pressed and supported by the positioning member for positioning. The left and right springs of the pressing spring are equal, so that both sides of the tape cassette are pressed and supported with equal force.

By the way, the lid opening operation member for opening the lid of the tape cassette is provided so that the magnetic tape wound inside the tape cassette is located slightly inward from both sides of the front side of the cassette body. Since the magnetic tape loading mechanism advances into the opening provided at the center of the bottom side of the cassette body, the tape is fed out from the tape draw-out hole located at the front side of the tape cassette. It is located in a position offset to the side. The lid opening operation member is attached to the main body of the apparatus by being urged to rotate toward the tape cassette side by the elastic means, and is opened under the lid as the tape cassette inserted into the cassette holder is lowered. The lid comes into contact with the edge and is opened against a spring that biases it in the opening direction, and the lid rotates in a direction away from below the tape against the bias of the elastic means. Be manipulated.

<Problems to be solved by the invention> In the cassette device configured as described above,
A force in the opposite direction to the transport direction is applied by the lid opening operation member to the tape cassette inserted and held in the cassette holder and transported to the performance position. Since the lid opening operation member is provided at a position offset to one side of the tape cassette, a force in the opposite direction to the transport direction is applied only to one side of the tape cassette. As a result, the side of the tape cassette that is associated with the lid-opening operation member is lifted up, and the tape cassette is tilted in the left-right direction within the cassette holder. As a result, the positioning hole drilled on the bottom surface of the tape cassette cannot be smoothly inserted into the positioning member, and the tape type discrimination pin cannot be smoothly inserted into the tape type discrimination hole also drilled on the bottom surface of the tape cassette. This not only makes it impossible to smoothly attach the tape cassette to the performance position, but also prevents the tape cassette from being positioned and attached horizontally on the positioning member. As a result, the loading of the magnetic tape by the loading mechanism becomes unstable, making it impossible to run the magnetic tape on a predetermined tape running path, leading to deterioration of recording and reproducing characteristics, and further causing damage to the magnetic tape.

Therefore, the spring pressure of the pressing parts on both the left and right sides of the pressing spring is increased while remaining equal, and the upper surface sides under the tape are pressed against the spring pressure of the elastic means that biases the rotation of the lid opening operation member. , the tape is configured to be tilted left and right as described above to prevent the bottom of the tape from lifting up.

However, since the lid opening operation member opens the lid under the tape against the spring that biases the lid to open, a resilient means for rotationally biasing the lid opening operation member is required. has a spring pressure that is sufficiently larger than that of the spring described above, and the spring pressure of the pressing parts on both sides of the pressing spring that tries to press and support the bottom of the tape horizontally against the spring pressure of this elastic means becomes extremely large. Put it away.
When lowering the lower holder so as to position and attach the lower portion of the tape to the positioning member, the pressing force becomes extremely large when the lower holder is pressed to a position where it can be locked into the lock portion provided in the attachment main body. That is, the lower holder is lowered, the tape lower part comes into contact with the positioning member and is pressed, the gap between the lower holder and the tape lower is absorbed, the pressing force of the pressing spring is applied, and then the tape can be further locked into the lock part. The pressing force when pressing the cassette holder becomes extremely large, and the pressing operability of the cassette holder becomes extremely poor.

Furthermore, since the lower holder, which is locked by the locking portion and is in the performance position, is raised to the lower insertion position, the force required to release the lock increases. In other words, since the cassette holder is locked in the lock section by the reaction force of the pressure spring, releasing the lock requires a force that resists the spring pressure of the pressure spring, making the unlocking operation difficult. Become. If the lock release operation is performed by a motor, the motor becomes larger and power consumption inevitably increases.

Therefore, the present invention reduces the force required when pressing the cassette holder as described above when positioning and mounting the tape cassette on the positioning member, improves operability, and further improves the locking part of the cassette holder. The present invention provides a cassette device that facilitates the unlocking operation.

<Means for Solving the Problems> In the present invention, a tape cassette having a lid provided on the front side and a spring biasing the lid in the closing direction is inserted, and the tape cassette is inserted into the tape cassette insertion position. A cassette holder is supported so as to be movable up and down between the tape cassette and the playing position, and when the cassette holder reaches the playing position, it comes into contact with the bottom surface of the tape cassette inserted into the cassette holder to position the tape cassette. a pressing spring provided on the cassette holder for pressing the tape cassette against the positioning member at the playing position; and a lid opening operation member for opening the lid of the tape cassette. In the cassette device, the spring pressure of the pressing spring on the side where the lid opening operation member is provided is greater than that on the side where the lid opening operation member is not provided.

<Function> The present invention makes it easier to open the lid by making the spring pressure of the pressing spring on the side where the lid opening operation member is greater than on the side where the lid opening operation member is not installed. The reaction force applied to the tape cassette from the lid operating member is received by the side of the pressure spring with the higher spring pressure and is canceled out, thereby maintaining the balance with the side of the pressure spring with the weaker spring pressure. It is held horizontally without being devised, and is horizontally pressed and supported on the positioning member without being displaced.

Then, the balance between the force pressing the tape cassette by the pressing spring on the side that receives the force of the lid opening operation member and the side that does not receive the force of the lid opening operation member is determined by the pressing force on both sides of the pressing spring. Since the pressure is adjusted by varying the pressure, the total force of the pressing springs pressing both sides of the tape cassette is smaller than the sum of the pressing forces of the pressing springs that press both sides of the tape cassette equally as in the conventional system. Become.

<Embodiments> Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

Tape cassette inserted and held in the cassette device of the present invention First, a tape cassette 1 that is inserted and held in the cassette device of the present invention and installed in a magnetic recording and reproducing apparatus having a rotating magnetic head device provided with this cassette device will be explained. Then, as shown in FIG. 2, this tape cassette 1 has a pair of tape reels 5, 5 rotatably mounted in a cassette main body 4, which is constructed by butting and joining a pair of upper half 2 and lower half 3. A magnetic tape 6 is wound between these tape reels 5, 5. As shown in FIG. 3, this magnetic tape 6 is inserted into tape draw-out holes 6a and 6b provided on both sides of the front side of the cassette body 4.
It is pulled out from the cassette body 4 and runs along the front side of the cassette body 4 in the left-right direction. The magnetic tape 6 is pulled out from the bottom of the center of the front side of the cassette main body 4 where the magnetic tape 6 runs, is guided to a tape running path in the magnetic recording/reproducing device, and is wound around a drum device of a rotating magnetic head device. A recess 7 is formed into which a loading mechanism to be operated enters. Further, on the front side of the cassette body 4, a lid body 8 for protecting the magnetic tape 6 drawn out to the outside of the cassette body 4 is pivoted on both sides of the cassette body 4 on arm portions on both sides. It can be installed freely. This lid body 8 is biased in the lid opening direction by a spring 9 attached to a pivot shaft 8a to the cassette main body 4.
The front side of the cassette main body 4 is opened to protect the magnetic tape 6 except when it is installed in a magnetic recording/reproducing device. Furthermore, as shown in FIG. 3, reel shaft insertion holes 10, 10 into which the reel shafts of the magnetic recording/reproducing device are inserted are bored at positions corresponding to the tape reels 5, 5 of the cassette body 4. Positioning pin engagement holes 11, 11 are formed on both sides of the bottom surface on the front side surface side, and the positioning pin engagement holes 11, 11, into which a pair of positioning pins constituting the positioning member for positioning the tape cassette 1 engage, are bored, and on the bottom surface of both sides on the rear side side, positioning pin engagement holes 11, 11 are formed to engage with a pair of positioning pins constituting the positioning member that positions the tape cassette 1. A plurality of tape type identification holes 12 are formed in which detection probes for detecting the type and length of the wound magnetic tape 6 are engaged.

A cover plate 13 is slidably attached to the bottom surface of the cassette body 4 to cover the recess 7 where the magnetic tape 6 faces outward. This cover plate 13
is slidably attached by engaging guide projections 14 provided on the inner surfaces of the rising walls provided on both sides with guide grooves 15 provided on both sides of the cassette body 4. The cover plate 13 is always biased by a torsion coil spring 16 attached to the cassette body 4 so that the recess 7 of the cassette body 4 can be opened except when it is inserted into the cassette holder. A pair of lock pins 1 are formed on the bottom plate of the cassette body 4 to prevent the cassette from sliding easily against the biasing force of the torsion coil spring 16.
7 is engaged with the lock hole 18 and locked, as shown in FIG.

The lock pin 17 is provided protruding from the tip of an elastic deflection arm 20 formed by drilling a slot 19 in the bottom plate of the cassette body 4.

Further, a slide groove 21 is provided in the portion extending from the front side surface of the cover plate 13 to the lock hole 18, in which a protrusion for unlocking the cover plate provided on the cassette holder engages and slides. ,
As shown in FIG. 3, an opening 22 opens corresponding to the reel shaft insertion holes 10, 10 when slid.
22 is drilled.

Tape cassette 1 configured as described above
When the cassette holder is inserted into the magnetic recording/reproducing device and the player is operated to place it in the playing position, the lid 8 is opened, the cover plate 13 is slid rearward, and the front side is opened. , loading of the magnetic tape 6 becomes possible, and the reel shaft engages with the tape reels 5, 5, allowing the magnetic tape 6 to travel.

A cassette device according to the present invention will be described in which the tape cassette 1 described above is inserted, the lid 8 of the tape cassette 1 is opened, the cover plate 13 is slid, and the tape cassette 1 is positioned and held at a playing position.

Structure of the cassette device according to the present invention The cassette device according to the present invention has the configuration shown in FIGS. 1 and 5.
As shown in the figure, the tape cassette 1 is inserted, and the cassette is supported so as to be movable up and down between the tape cassette insertion position protruding outward from the main body of the magnetic recording and reproducing apparatus and the playing position of the tape cassette 1. It has a holder 23. The cassette holder 23 includes a substantially U-shaped upper holder 24 formed by molding synthetic resin;
The upper holder 24 and the lower holder 25 are connected by screws 25.
They are connected by a to form a box shape. The cassette holder 23 is formed so as to have a clearance between it and the tape cassette 1 inserted therein in the height direction, and has a size approximately corresponding to the width of the tape cassette 1 in the width direction. The tape cassette 1 is formed horizontally so that the tape cassette 1 can be inserted therein without rotating.

The cassette holder 23 is rotatably mounted via its base end to a support shaft 27 which is mounted across a pair of mounting boards 26, 26, each of which is fixed on both sides to the main body of the magnetic recording/reproducing device. A pair of rotating arms 28, 28, and a pair of auxiliary arms 29, 29, which are arranged parallel to these rotating arms 28, 28 and whose base ends are rotatably supported on the mounting boards 26, 26, are used. Supported.
That is, the cassette holder 23 is rotatably mounted on support pins 30, 31 bored on both sides of the ends of the rotary arms 28, 28 and the auxiliary arms 29, 29, so that the cassette holder 23 is rotatably supported. It is rotatably attached to the support shaft 27 via arms 28, 28 and auxiliary arms 29, 29. The locking pieces 28a, 28a hanging down and protruding from the proximal ends of the respective rotating arms 28, 28 and the support pins 30, 31 that pivotally support the auxiliary arms 29, 29 to the cassette holder 23
Tension springs 32, 32 are tensioned between them, respectively, and the rotating arms 28, 28 and the auxiliary arm 2
9 and 29 are rotated in the direction of arrow A in FIG. 5, and the cassette holder 23 is urged to float to the cassette insertion position shown in FIG. A positioning pin 3 is attached to one of the mounting boards 26 and is in contact with an auxiliary arm 29 located on the mounting board 26 to determine the cassette insertion position of the cassette holder 23.
3 is provided.

Cassette holder 2 installed as described above
3 is rotated in the direction of arrow A in FIG. 5 against the urging force of the tension springs 32, 32 by pressing the upper surface thereof, and is lowered to the playing position of the tape cassette 1. When lowered to this playing position,
The cassette holder 23 is provided at the tip of a lock arm 37 which is rotatably biased by a spring 36 provided on the main body of the apparatus, in an engagement recess 35 formed in a lock piece 34 that is projecting downward from one side of the lower holder 25. The lock pin 38 is engaged and locked.

Mechanical chassis 3 constituting the main body of the magnetic recording and reproducing device in which the cassette holder 23 is disposed.
A reel shaft 9 engages with the tape reels 5, 5 of the tape cassette 1 inserted into the cassette holder 23 to rotate these tape reels 5, 5 when the cassette holder 23 reaches the performance position. 40, 40 are provided in a protruding manner, and further abut on the bottom surface of the tape cassette 1, so that the tape cassette 1
Positioning pins 41, 41 and height positioning pins 42, 42, which are positioning members for positioning, are provided. The above positioning pins 41, 41
has narrow diameter portions 41a, 41a at the tip, and when it comes into contact with the bottom surface of the tape cassette 1, the narrow diameter portion 41
a, 41a engage with the positioning pin engagement holes 11, 11, and the locking steps 41b, 41b position the tape cassette 1 in the height and horizontal direction. Further, the height positioning pins 42, 42 abut and support the bottom rear end side of the tape cassette 1 to determine the height position.

Further, a tape cassette 1 is mounted on the mechanical chassis 39 where the positioning pins 41, 41, etc. are provided.
A detection probe 43 is provided on the side from which the height positioning pins 42, 42 protrude, and which engages with the tape type discrimination hole 12 provided on the bottom of the tape to discriminate the tape type.

Further, on the mechanical chassis 39, there is a lid opening operation member for opening the lid 8 of the tape cassette 1 inserted into the cassette holder 23 in conjunction with the lowering operation of the cassette holder 23 toward the performance position. 45 are provided. This lid opening operation member 45 is located opposite to the front side surface of the tape cassette 1 inserted into the cassette holder 23, on which the lid 8 is provided, and locks the cover plate 13 provided on the tape cassette 1. It is provided at a position offset to one side where the lock pin 17 is not provided.
The lid opening operation member 45 has an L-shaped mounting plate 46 mounted on the mechanical chassis 39.
A cylindrical pivot 49 protruding from the side wall is fitted onto a support shaft 48 protruding from the inner surface of the rising piece 47 of the tape cassette 1, so that the tape cassette 1 can be rotated in the direction in which the tape cassette 1 enters.
The surface of the tape cassette 1 facing the lid 8 has a surface that engages with the lower end surface 44 of the lid 8 to form the lid 8.
A lid opening operation section 50 is provided for rotating the lid. Further, a torsion coil spring 51 is wound around the pivot portion 49 of the lid opening operation member 45. This torsion coil spring 51 has one end locked to the lid opening operation member 45 and the other end locked to the mounting plate 46 to connect the lid opening operation member 45 to the tape cassette 1.
is biased to rotate toward the front side. At this time, the lid opening operation member 45 is locked by the locking piece 52 of the mounting plate 46, and its rotational position is regulated.

By the way, the lower holder 25 of the cassette holder 23 constituting the cassette device according to the present invention has a front edge on the tape cassette insertion side inclined downward, and serves as a relief part when inserting the tape cassette 1 and also as a slide guide part. A surface portion 55 is provided. On the rear side of the lower holder 25, a pair of slide operation pieces 56 are formed which are raised and engage with the front edge of the cover plate 13 of the inserted tape cassette 1 to slide the cover plate 13. Furthermore, a protrusion for unlocking the cover plate is formed by half-cutting the lower holder 25 at a position corresponding to the lock pin 17 for locking the cover plate 13 of the tape cassette 1 inserted on one side of the bottom surface of the lower holder 25. A portion 57 is formed.

Composition of Pressure Spring On the other hand, a pressure spring 58 formed of a long plate spring is attached to the upper surface of the upper holder 24 constituting the cassette holder 23. This pressing spring 58 is arranged so as to fit into a fitting recess 59 formed on the upper surface of the upper holder 24, and a center hole 60 is inserted into the fitting recess 59 as shown in FIG. The upper holder 24 is fitted into the protruding fitting protrusion 61, and both sides of the wide center part are fitted into the upper holder 24.
It is attached by being locked by locking pieces 62 and 63 that protrude horizontally into the fitting recess 59 from the upper surface.

Slit grooves 66 and 67 are provided at both sides of the upper holder 24 to which the pressure spring 58 is attached, corresponding to the first and second pressing portions 64 and 65 formed by bending both ends of the pressure spring 58. First and second tape cassette pressing pieces are provided which are perforated and formed integrally with the upper holder 24 and which are elastically deflectable. These tape cassette pressing pieces 6
8 and 69 are formed as connecting parts to the upper holder 24 on the insertion side of the tape cassette 1, and are provided with bulges 70 and 70 on the lower end surface of the distal end side to press the upper surface of the tape cassette 1, and the upper surface of the distal end side The protruding portion 7 that comes into contact with each of the pressing portions 64 and 65 of the pressing spring 58
1,71 are provided. The first and second tape cassette pressing pieces 68, 69 are urged inwardly by the pressing spring 68 to press the tape cassette 1 in the playing position against the positioning pins 41, 41 and height positioning. pin 42,
It acts to press and support on 42.

By the way, the spring pressure with which the pressing spring 58 presses the first and second tape cassette pressing pieces 68 and 69 is different between the first and second tape cassette pressing pieces 68 and 69, respectively. That is, the spring pressure that presses the first tape cassette pressing piece 68 located on the side where the lid opening operation member 54 is disposed is different from the spring pressure that presses the first tape cassette pressing piece 68 located on the side where the lid opening operation member 45 is disposed. The spring pressure is set to be larger than the spring pressure that presses the second tape cassette pressing piece 69.

In this way, the spring pressure is applied to the first and second pressing parts 6.
4 and 65, the pressure spring 58 is the first
The bending angle on the pressing part 64 side is made larger than the bending angle on the second pressing part 65 side. Then, the side of the first pressing part 64 with a larger bending angle is floated and supported by the support protrusion 73 protruding from the upper surface of the upper holder 24, as shown in FIG. It is made to enter inside the holder 23.

Therefore, the first tape cassette pressing piece 68 is
Even when the cassette holder 23 is in the tape cassette insertion position, it is pressed by the first pressing part 64 as shown in FIG. 9, and the second tape cassette pressing piece 69 is pressed as shown in FIG. Either they are separated and not pressed by the second pressing part 65, or they are placed in a state where they are in contact with the second pressing part 65. By attaching the pressing spring 58 in this manner, the cassette holder 23 is lowered to the playing position, and the tape cassette 1 comes into contact with the positioning pins 41, 41.
When a reaction force is applied to the first and second tape cassette pressing pieces 68 and 69 that press this tape cassette 1 and the first and second pressing parts 64 and 65 are pressed upward, the first pressing As shown in FIG. 12, the bending displacement point of the portion 64 is located closer to the center hole 60 serving as the fixed portion than the bending displacement point of the second pressing portion 65, and the bending displacement length becomes larger. The spring pressure for pressing the first tape cassette pressing piece 68 of the first pressing part 64 is greater than the spring pressure for pressing the second tape cassette pressing piece 69 of the second pressing part 65.

Note that the first and second tape cassette pressing pieces 6
8 and 69 to vary the pressing force on both sides of the tape cassette 1. In the above embodiment, the bending displacement points on the left and right sides of the integral pressing spring 58 are varied, but separate springs are used. The pressure may be varied by using pressure springs with different pressures.

Mounting operation of tape cassette To explain the state in which the tape cassette 1 is mounted in the performance position using the cassette device constructed as described above, first, the lock piece 34 of the cassette holder 23 is unlocked from the lock pin 38, and as shown in FIG. Float the tape cassette at the insertion position as shown. When the tape cassette 1 is inserted from the front side of the cassette holder 23, the cover plate lock release protrusion 57 engages with the slide groove 21 on the bottom surface of the tape cassette 1, as shown in FIG. When the tape cassette 1 is further inserted into the cassette holder 23, the cover plate lock release protrusion 57 pushes up the lock pin 17 to release the lock on the cover plate 13, and the slide operation piece 56 engages with the cover plate 13. , the cover plate 13 is moved to the rear of the cassette main body 4. Here, cassette body 2
3 toward the playing position against the tension springs 32, 32, the lower end surface 44 of the lid 13 provided on the front side of the tape cassette 1 comes into contact with the lid opening operation part 50 of the lid opening operation member 45. . And the lid body 11
3, while rotating the lid opening operation member 45 against the torsion coil spring 51, the lid opening operation member 45 is rotated against the spring 9 by the biasing force of the torsion coil spring 51 as shown in FIG. The lid is opened as shown. When the lid body 13 is opened and the cassette body 23 is lowered to the playing position in this manner, the tape cassette 1 inserted into the cassette body 23 is engaged with the positioning pins 41, 41. The holes 11, 11 are engaged, and the bottom surfaces are brought into contact with the height positioning pins 42, 42 for positioning, and the reel shafts 40, 40 are engaged with the tape reels 5, 5. At this time, the cassette holder 23 is further lowered and the lock pin 3
At 8, the locking piece 34 is locked, and the instrument is slightly raised again to the playing position.

When the cassette holder 23 is positioned at the playing position as described above, the tape cassette 1 is pressed against the pressing spring 5.
As shown in FIG. 7, the positioning pins 41, 41 and height positioning pins 42,
42 for positioning and mounting.

<Effects of the invention> The present invention makes the spring pressure of the pressing spring on the side where the lid opening operation member is greater than that on the side where the lid opening operation member is not installed. The reaction force applied to the tape cassette from the body opening operation member is received and canceled by the side of the pressure spring with the higher spring pressure, and the balance with the side of the pressure spring with the weaker spring pressure is maintained, so the tape cassette is It is held horizontally without a cassette holder, and can be horizontally pressed and supported on the positioning member without being displaced.

Then, the balance between the force pressing the tape cassette by the pressing spring on the side that receives the force of the lid opening operation member and the side that does not receive the force of the lid opening operation member is determined by the pressing force on both sides of the pressing spring. Since the pressure is adjusted by varying the pressure, the total force of the pressing springs pressing both sides of the tape cassette is smaller than the sum of the pressing forces of the pressing springs that press both sides of the tape cassette equally as in the conventional system. Therefore, it is possible to provide a cassette device with good operability and a good feeling of operation. In other words, by considering the reaction force received from the lid opening operation member and increasing only the spring pressure on the side where this reaction force is applied, the total pressing force of the pressing springs is reduced, and the cassette holder is moved to the playing position. Since the reaction force of the pressing spring when the cassette holder is lowered and locked is reduced, the force for pressing the cassette holder can be reduced and good operability can be obtained.

In addition, in the above embodiment, the protrusion for releasing the cover plate lock is provided on the side of the pressure spring where the spring pressure is smaller, so that when the tape cassette is inserted into the cassette holder, it is not lifted up by the load from the protrusion. Even if the tape cassette comes into contact with the pressure spring, the load generated therefrom is small, and the load upon insertion of the tape cassette can be reduced and operability will not deteriorate.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view of a tape cassette installed in the device of the present invention, and FIG. 3 is a perspective view of the tape cassette with its lid opened. FIG.
The figure is a bottom view showing the bottom side of the tape cassette. Fig. 5 is a side view of the cassette device according to the present invention, with the cassette holder in the tape insertion position, Fig. 6 is a side view with the cassette holder in the playing position, and Fig. 7 is a plan view thereof. be. FIG. 8 is a cross-sectional view showing how the pressure spring is attached at the center, and FIG. 9 is a sectional view showing the pressure spring and the first
FIG. 10 is a sectional view showing the relationship between the pressing spring and the second tape cassette pressing piece, and FIG. 11 shows the cassette holder in the tape cassette insertion position. FIG. 12 is a vertical cross-sectional view showing the state of the pressure spring when the cassette holder is in the playing position.
FIG. 13 is a sectional view showing the tape cassette cover plate opened, and FIG. 14 is a sectional view showing the tape cassette cover plate opened. DESCRIPTION OF SYMBOLS 1...Tape cassette, 7...Recess, 8...Lid, 8a...Pivot shaft, 9...Spring, 11, 11...
...Positioning pin engagement hole, 17...Lock pin, 1
8... Lock hole, 28, 28... Rotating arm, 2
9, 29... Auxiliary arm, 32, 32... Tension spring, 34... Lock piece, 38... Lock pin,
41, 41... Positioning pin, 42, 42... Height positioning pin, 45... Lid opening operation member, 5
0... Lid opening operation part, 57... Cover plate lock release protrusion, 58... Pressing spring, 64, 65... Pressing part, 68, 69... Tape cassette pressing piece.

Claims (1)

[Scope of Claim for Utility Model Registration] A tape cassette having a lid provided on the front side and a spring biasing the lid in the closing direction is inserted, and the tape cassette insertion position and the playing position of the tape cassette are a cassette holder supported so as to be movable up and down between the cassette holders; a positioning member that comes into contact with the bottom surface of the tape cassette inserted into the cassette holder to position the tape cassette when the cassette holder reaches the playing position; A cassette device comprising a pressing spring provided on the cassette holder that presses the tape cassette against the positioning member at the performance position, and a lid opening operation member that opens the lid of the tape cassette, wherein the lid A cassette device characterized in that the spring pressure of the pressing spring on the side where the body opening operation member is provided is greater than the spring pressure on the side where the lid opening operation member is not provided.