JP2569598B2 - Tape cassette mounting device in cassette type magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A. Industrial application fields B. Summary of the invention C. Conventional technology (FIGS. 16 to 19) D. Problems to be solved by the invention E. Means to solve problems F. Action G Example G-1 Schematic Configuration of a Rotary Magnetic Head Type Audio PCM Tape Recorder (FIGS. 1, 2 and 4) G-2 Cassette Holder (FIGS. 1, 5, 6 and 7) Fig. G-3 Cassette holder lock mechanism (Fig. 1, Fig. 3,
G, G, G, G, G, G, G, G
G-5, Fig. 8, Fig. 9, Fig. 10 and Fig. 11) G-5 Outer lid and opening / closing mechanism of outer lid (Fig. 1, Fig. 2, Fig.
G-6 Eject operation prohibition mechanism (Figs. 1, 8, 9, 10 and 11) G-7 Lock release prohibition of cassette holder lock mechanism Mechanism (FIGS. 3, 4, 13 and 14) G-8 Tape cassette mounting detection mechanism (FIGS. 6 and 7)
G-9 Loading start operation mechanism (Fig. 1, Fig. 10 and Fig. 11) G-10 Mounting operation and loading operation of tape cassette G-11 Others H. Effects of the invention A. INDUSTRIAL APPLICABILITY The present invention relates to a magnetic tape wound around a pair of tape reels rotatably mounted in a cassette body, which is drawn out to the front outside of the cassette body and extends. A tape cassette having a front lid rotatably mounted on the front side of the cassette body so as to cover the magnetic tape and urged in a direction to cover the magnetic tape by urging means is inserted and held, Tape cassette mounting device in a cassette type magnetic recording / reproducing device including a cassette holder rotatably supported between a tape cassette insertion / removal position and a tape cassette mounting position. About.

B. Summary of the Invention According to the present invention, a magnetic tape wound around a pair of tape reels rotatably mounted in a cassette main body is drawn out to the front outside of the cassette main body and extends. A tape cassette having a front cover rotatably mounted on the front side of the cassette main body so as to cover the magnetic tape and urged to rotate in a direction covering the magnetic tape by an urging means is inserted and held. When the cassette holder rotatably supported between the insertable / removable position and the tape cassette mounting position is rotated to the tape cassette mounting position, the front end of the cassette holder opposed to the pivot side of the cassette holder is rotated. By locking the approximate center position, the cassette holder is prevented from being twisted and locked stably, and against the urging means. It is obtained by adapted to be attached stably to the tape cassette attachment position to prevent floating of the tape cassette surface cover is held in the open position.

C. Conventional technology Conventionally, a tape cassette containing a magnetic tape is used as a recording medium, and the magnetic tape stored in the tape cassette is wound around a tape guide drum of a rotary magnetic head device and run. A cassette type magnetic recording / reproducing apparatus such as a rotary magnetic head type audio PCM tape recorder or video tape recorder which records and reproduces an audio signal or a video signal by sliding a head has been proposed and used.

This type of cassette type magnetic recording / reproducing apparatus records an audio signal or the like at an extremely high frequency and at a high density. Therefore, if a magnetic tape as a recording medium is damaged or dust is attached, recording characteristics are significantly deteriorated. It will be.

In order to prevent such scratches and adhesion of dust, the magnetic tape is housed in a sealable tape cassette.

For example, a tape cassette used in a rotary magnetic head type audio PCM tape recorder is configured as shown in FIGS. 16 to 19 so that a magnetic tape can be sealed.

As shown in FIGS. 16 to 19, this tape cassette 201 has a pair of tape reels 205, 2 in a cassette half 204 formed by butt-connecting a pair of upper and lower halves 202, 203.
06 is rotatably supported, and a magnetic tape 207 is wound and stored between these tape reels 205 and 206. The magnetic tape 207 extends outwardly from the front side of the cassette half 204 via tape outlets 208 and 209 formed on both sides on the front side of the cassette half 204, and extends from one tape recorder 205 to the other tape reel 206. It is wound around. Also, on the front side of the cassette half 204,
A front cover 210 is rotatably mounted to protect the magnetic tape 207 extending to the front side of the cassette half 204 when the tape cassette 201 is not mounted on the tape recorder. As shown in FIG. 18, the front cover 201
A torsion coil spring as biasing means wound around the rotating shaft 210a
The rotation is biased in the closing direction to cover the magnetic tape 207 extending to the front side of the cassette half 204 by the 211.

Further, on the bottom side of the cassette half 204, FIG.
As shown in FIG. 18 and FIG.
Cassette half 2 above when not mounted on tape recorder 1
A closing plate 214 having a U-shaped cross section is provided to close the reel shaft insertion holes 212 and 213 formed on the bottom side of the 04 and prevent dust and the like from entering the cassette half 204 and protect the magnetic tape 207. It is slidably mounted in the direction. This closing plate 21
A pair of projecting pieces 215, 215 protrude from the front end of the cassette half 4, and the front of the cassette half 204 in the direction of closing the reel shaft insertion holes 212, 213 by a torsion spring 216 attached to the cassette half 204 side as shown in FIG. When it is urged to the side, it is locked to the front side of the cassette half 204 as shown in FIG. At the lower end edge of the front cover 210 corresponding to the protrusions 215, 215, notch recesses 217, 217 serving as escape portions when the cassette half 204 relatively moves with respect to the closing plate 214 are formed.

Further, a pair of insertion holes 21 is formed in the main surface of the closing plate 214.
When the closing plate 214 is relatively moved to the rear of the cassette half 204, the insertion holes 218 and 218 are formed in the bottom plate of the lower half 203 as shown by a two-dot chain line in FIG. The reel drive shaft provided in the tape recorder, which is aligned with the reel shaft insertion holes 212 and 213, can enter the cassette half 204. Then, the closing plate 214 is moved forward, and as shown in FIG. 18, the magnetic tape 207 formed on the front side of the cassette half 204 is pulled out of the cassette half 204 to the tape recorder side where the loading operation is performed. When the space below the space 219 facing the tape pull-out means of the loading operation mechanism provided is closed, the insertion holes 218 and 2 of the closing plate 214 are closed.
The positions of the reel shaft insertion holes 212 and 213 of the lower half 203 are shifted from each other, and the reel shaft insertion holes 212 and 213 are closed by the main surface of the closing plate 214.

Further, a closing plate formed on a bottom plate of a cassette holder provided in a tape recorder described later is provided on the closing plate 214.
A shallow groove 220 into which a ridge portion serving as an unlocking means for unlocking the locking means 214 is formed is formed. This shallow groove 220
Is formed by opening the front end side of the closing plate 214 in the front-rear direction of the closing plate 214. The shallow groove 220 is closed at the closed position where the closing plate 214 closes the space 219 and the reel shaft insertion holes 212 and 213 of the cassette half 204 and at the open position where the space 219 and the reel shaft insertion holes 212 and 213 are opened. An engagement hole 223 and an engagement notch 224 are formed in the engagement portion 222 of the lock piece 221 provided on the cassette half 204 for locking the plate 214. The lock piece 221 has a rear end connected to the bottom plate of the lower half 203 by forming a U-shaped notch in the bottom plate of the lower half 203, and integrally has a hemispherical engagement projection 222 on the lower surface of the front end. Has formed.

Then, as shown in FIG. 17 and FIG.
Is closed, the engagement holes 2 provided in the closing plate 214 are closed.
Engagement projection 222 at the tip of lock piece 221 is engaged with 23, and the closing plate 214 is locked so as not to move toward the open position.

Furthermore, a tape reel 20 rotatably supported in the cassette half 204 is provided in the cassette half 204.
The reel lock lever 226 prevents the magnetic tape 207 wound therefrom from being loosened and damaged when the tape recorder 5206 is not attached to the tape recorder.
Extending in the width direction on the inner surface of the upper half 202
A pair of slide guide pins 227, 227
Are engaged with the tape reels 205 and 206 so as to be slidable in the front-rear direction, and are urged toward the tape reels 205 and 206 by the torsion coil spring 229 attached to the inner surface of the upper half 202 so as to be attached. I have.
Then, the pressing pieces 230, 230 protruding from one side of the reel lock lever 226 are pressed against the outer peripheral surfaces on the upper ends of the tape reels 205, 206 to lock the tape reels 205, 206 so that they cannot rotate. On both sides of the reel lock lever 226, a moving operation arm 231 that engages with the rotating piece 210b of the front cover 210 when the front cover 210 is opened is extended in the front-rear direction on the side surface of the cassette half 204. It is formed so that it does. When the front cover 210 is rotated to open the front side of the cassette half 204 as shown in FIG. 18, the moving operation arm 231 of the cassette half 204 is moved by the turning piece 210b of the front cover 210. Moved forward, the reel lock lever 226 moves away from the tape reels 205 and 206 against the urging force of the torsion coil spring 229. By the operation of moving the reel lock lever 226, the pressing of the tape reels 205, 206 by the pressing pieces 230, 230 is released, and the tape reels 205, 206 are freely rotatable so that the magnetic tape 207 can be fed out of the cassette half 204.

The tape cassette 201 configured as described above is
The tape cassette is mounted at the tape cassette mounting position in the tape recorder main body via a cassette holder rotatably supported between the tape cassette mounting position and the tape cassette mounting position.

In the tape cassette 201, the relative movement operation of the cassette half 204 and the closing plate 214 is performed by the insertion and holding operation into the cassette holder, and the reel shaft insertion holes 212 and 213 are provided.
When the cassette holder is rotated to the tape cassette mounting position, the front cover 210 is rotated to open the front side of the cassette half 204, and the magnetic tape 207 is exposed and pulled out. Make it possible.

D. Problems to be Solved by the Invention By the way, the tape cassette configured as described above
201 is a closing plate 214 with a torsion spring 216 as described above.
To the closed position and torsion coil spring 211
10 to rotate the reel lock lever 226 with the torsion coil spring 229 to bias the tape reels 205 and 206 to the closed position.
Is locked. When the tape cassette 201 is mounted at the tape cassette mounting position, the torsion spring 216, the torsion coil spring 211, and the reel lock lever are used to engage the reel shaft with the tape reels 205 and 206 so that the magnetic tape 207 can be pulled out. It is necessary to move the closing plate 214 against the urging force of the 226, rotate the front cover 210, and hold the reel lock lever 226 in the moved state. Therefore, a tape cassette as described above
A strong elastic restoring force generated from the above-mentioned many springs acts on the cassette holder that holds 201 at the tape cassette mounting position.

The conventional cassette holder has a configuration in which one side of the front end side facing the pivoting support portion is locked and held at the tape cassette mounting position.
When a large force is applied from the tape cassette as described above, the unlocked side is lifted, and the tape cassette cannot be mounted at an appropriate mounting position.

As a result, a smooth loading operation of the magnetic tape cannot be performed, which causes an accident such as damaging the magnetic tape or damaging the loading operation mechanism.

Therefore, the present invention provides a tape cassette in which elastic restoring force is generated by a large number of springs when the tape cassette is mounted at the tape cassette mounting position. The present invention has been proposed for the purpose of providing a tape cassette mounting apparatus which enables a tape cassette to be stably and accurately mounted at a tape cassette mounting position.

E. Means for Solving the Problems In order to achieve the above object, the present invention provides a magnetic tape wound around a pair of tape reels rotatably mounted in a cassette body. The cassette is drawn out of the front surface of the cassette body and extends, and is rotatably mounted on the front side of the cassette body so as to cover the magnetic tape. A cassette holder having a front cover formed of a tape holder is inserted and held, and is rotatably supported between a position where the tape cassette can be inserted and removed and a position where the tape cassette is mounted. When operated, the front cover of the tape cassette inserted into and held in the cassette holder is positioned on the front side of the cassette body against the urging force of the urging means. Front cover opening support means for supporting the cassette in an open state, and when the cassette holder is rotated to the tape cassette mounting position, engages with a substantially central position on the front end side of the cassette holder opposite to the pivot side, A cassette holder locking means for locking the cassette holder at the tape cassette mounting position is provided.

F. Action The present invention is configured such that when the tape cassette is inserted into and held by the cassette holder and is rotated to the tape cassette mounting position, the front lid of the tape cassette is rotated by the front lid opening support member, and the front side of the tape cassette is rotated. In a state where the state where the magnetic tape is exposed and opened is held,
The cassette holder is locked and held at a substantially central position on the front end side facing the pivot side.

G. Embodiment Hereinafter, a specific embodiment in which the present invention is applied to a rotating magnetic head type audio PCM tape recorder will be described with reference to the drawings.

G-1 Schematic Configuration of Rotary Magnetic Head Type Audio PCM Tape Recorder (FIG. 1, FIG. 2, FIG. 3, and FIG. 4) Rotary magnetic head type audio PCM to which the present invention is applied
The tape recorder uses the tape cassette 201 as described above.
The tape cassette is inserted outside the outer casing 1 through a mechanical chassis 2 housed and arranged in an outer casing 1 constituting a tape recorder main body as shown in FIGS. 1 and 2. A cassette holder 3 rotatably supported between a detachable position and a tape cassette mounting position formed on the mechanical chassis 2, and the cassette holder 3 is rotated when the cassette holder 3 is rotated to the tape cassette mounting position. An outer lid 4 is provided rotatably mounted on the outer casing 1 closed and covering the cassette holder 3. The tape cassette 201 configured as described above is moved to the tape cassette mounting position by rotating the cassette holder 3 in which the tape cassette 201 is inserted and held from the cassette insertion / removal position to the tape cassette mounting position. Be attached. At the tape cassette mounting position formed on the mechanical chassis 2, the tape reels 205 and 206 of the tape cassette 201 engage with the tape reels 205 and 206, respectively.
A pair of reel bases 7 and 8 having reel shafts 5 and 6 for operating the magnetic tape 207 on one of the tape reels 205 and 206 by rotating the 5,206 are provided. These reel stands 7, 8 are driven to rotate by a reel motor (not shown). At the tape cassette mounting position, a height positioning pin 9 for positioning the mounting height position of the tape cassette 201 mounted here is erected.

Further, on the side opposite to the tape cassette mounting position where the reel base or the like on which the tape cassette 201 is mounted is disposed, as shown in FIGS. Magnetic tape 2 pulled out
A rotating magnetic head device 10 around which 07 is wound is provided. Then, between the tape cassette mounting position and the rotating magnetic head device 10, the magnetic tape 2
A pair of moving guide blocks 11 and 12 that constitute a loading operation mechanism that draws 07 and runs around the tape guide drum of the rotary magnetic head device 10 are provided. A magnetic tape 207 is hooked around these moving guide blocks 11 and 12, and the magnetic tape 207 is wound around a tape guide drum of the rotary magnetic head device 10 at a predetermined angle, for example, over an angle range of about 90 °. Guide roller 13
And the inclined guide pin 14 is erected. The moving guide blocks 11 and 12 are guided by slide guide grooves 15 and 16 formed in the mechanical chassis 2 so that the tape guide roller 13 and the inclined guide pin 14 are mounted at the tape cassette mounting position. 201 space 219
3 is moved from the position shown in FIG. 3 which faces the rotary magnetic head device 10 to the position shown in FIG.
The moving operation of the moving guide blocks 11 and 12 is performed by rotating two loading rings 17 and 18 disposed around the outer periphery of the rotary magnetic head device 10. That is,
The moving guide blocks 11, 12 are connected to the loading rings 17, 18 by connecting arms 19, 20, respectively, and are moved by rotating the loading rings 17, 18 by the loading motor 21. It is. In addition, each loading ring 17,18
Is connected to the loading motor 21 so as to receive the transmission of the driving force via the connection gear mechanism 22 and the connection belt 23.

In addition, the tape cassette mounting position and the rotating magnetic head device
Between the 10 spaces, press the capstan shaft 24 against the magnetic tape
A pinch roller support arm 26 having a pinch roller 25 at the tip, a tape guide support arm 28 having a tape guide pin 27 at the tip, and a ten leg guide pin 29 at the tip are provided. A ten leg arm 30 that constitutes a tension regulator is rotatably disposed. The pinch roller support arm 26, the tape guide support arm 28, and the ten leg arm 30 are rotated toward the tape cassette mounting position shown in FIG. 3 by the rotational driving of the loading rings 17, 18 for moving the moving guide blocks 11, 12. The magnetic tape in the tape cassette 201 is rotated by rotating the movable guide blocks 11 and 12 between the pivoted position and the position pivoted toward the rotary magnetic head device 10 shown in FIG. 207 is wound around the rotary magnetic head device 10 to perform a loading operation on a predetermined tape traveling path that can travel.

G-2 Cassette Holder (FIGS. 1, 5, 6, and 7) The cassette holder 3 for mounting the tape cassette 201 to the tape cassette mounting position on the mechanical chassis 2 is shown in FIGS. As shown in FIG. 5, the tape cassette 201 has a pair of rotating arms 32 and 33 extending from both sides of the holder portion 31 in which the tape cassette 201 is inserted and held toward the base end. Mechanical chassis 2
The through holes 37, 37 are inserted into the support shafts 36, 36 erected on the opposite inner surfaces of the pair of chassis frames 34, 35 mounted on the upper side, so that the tape cassette 7 can be moved from the tape cassette insertable / removable position shown in FIG. It is supported so as to be rotatable between the tape cassette mounting positions shown in the figure. The cassette holder 3 is rotationally urged toward the cassette insertable / removable position side by the torsion coil springs 38 wound around the support shafts 36, 36, and unless the cassette holder 3 is locked by cassette holder locking means as described later. The torsional coil springs 38, 38 are turned and biased to the cassette insertable / removable position by the biasing force. The torsion coil springs 38, 38 wound around the support shafts 36, 36 lock the tip of one arm portion 38a in a locking hole 39 formed in the rotating arms 32, 33 of the cassette holder 3. The other end of the arm 38b to the chassis frame 3
The cassette holder 3 is pivotally urged to a cassette insertable / removable position by being attached by being engaged with an engagement hole 40 formed in each of the holes 4 and 35. As shown in FIGS. 6 and 7, a plurality of locking holes 40 for locking the other arm 38b are radially protruded from the chassis frames 34 and 35 to lock the other arm 38b. The position can be made variable, and the biasing force of the torsion coil springs 38, 38 for rotating the cassette holder 3 can be adjusted. Further, a cassette holder rotation restricting plate 41 is attached across the pair of chassis frames 34 and 35 supporting the cassette holder 3. The cassette holder 3 is rotated by the torsional coil springs 38, 38 by contacting the intermediate portions of the rotating arms 32, 33 with the cassette holder rotation restricting plate 31, so that the tape cassette can be inserted and removed. Is determined.

As shown in FIGS. 1 and 5, the holder 31 into which the tape cassette 201 is inserted and held includes a bottom plate 42 on which the tape cassette 201 is mounted and side plates 43 formed on both sides of the bottom plate 42. , 44 and an upper plate 45 disposed opposite to the bottom plate 42 and attached between the side plates 43, 44, and is formed in a substantially box shape. The bottom plate 42 is provided with through holes 46, 46 for inserting the reel shafts 5, 6, which are located apart from each other in the left-right direction. An inverted trapezoidal notch 47 is formed at the center of the rear end edge of the bottom plate 42, and a portion continuous to both side ends of the notch 47 projects slightly rearward. Sliding restricting protruding pieces 48, 48 that abut against the protruding pieces 215 provided on the closing plate 214 to restrict the movement of the closing plate 214 are formed upright. further,
A pair of ridges 49, 49 for pressing a lock piece 221 for locking the closing plate 214 of the tape cassette 201 is provided at a position on the bottom plate 42 closer to the side plates 43, 44. .

On the upper plate 45, a pair of cassette pressing plates 50, 50 formed of a plate spring for pressing and supporting the tape cassette 201 inserted and held in the holder portion 31 and holding the tape cassette 201 at a predetermined position to prevent the tape cassette 201 from coming off are provided. Is provided. These cassette pressing plates 5
Reference numerals 0, 50 are attached to the upper plate 45 with one end fixed on the upper plate 45 with the pressing rollers 51, 51 attached to the front ends facing through the through holes 52, 52 formed in the upper plate 45 into the holder portion 31. I have. In addition,
The cassette pressing plates 50, 50 are symmetrical to the right and left so as to evenly press the vicinity of a position corresponding to the shallow grooves 220, 220 of the tape cassette 201 near the upper surface both sides of the tape cassette 201 inserted and held in the holder portion 31. Must be mounted in position.

Further, on the front end side of the bottom plate 42 constituting the holder 31, there is provided a locked part 53 to which a cassette holder lock lever constituting a cassette holder locking means described later is engaged. The locked portion 53 is configured by attaching a shaft 55 having a roller 54 interposed to a front end edge of a central portion of the bottom plate 42. The locked portion 53 is mounted so that the roller 54 is fitted to the intermediate portion of the shaft 55 and faces the center position of the front edge of the bottom plate 42. It is made to be the front edge of the center position in the direction (axial direction).

In the center of the bottom plate 42 at the front end side, a through hole 56 is formed in which the height positioning pin 9 erected at the tape cassette mounting position enters.

Further, an upper surface protection plate 57 is attached to the upper surface side of the holder portion 31 in order to protect the tape cassette 201 inserted and held in the holder portion 31.

The tape cassette 201 is inserted into the holder section 31 of the cassette holder 3 configured as described above from the front cover 210 side. Here, the tape cassette 201 is
When the insertion is performed along the bottom plate 42, the insertion position in the left and right direction is regulated by the side plates 43 and 44, and the crimping is performed between the bottom plate 42 and the cassette pressing plates 50 and 50. here,
When the tape cassette 201 is further inserted into the holder portion 31, the projections 49, 49 formed on the bottom plate 42 engage with the shallow grooves 220, 220 formed on the closing plate 214 of the tape cassette 201, and the closing plate 214 is Lock piece 22 that locks to half 204
1 to the inside of the cassette holder 204 and
Release the lock at the closed position of 214. Subsequent to the release of the locking of the closing plate 214, the sliding restricting protruding pieces 48, 48 on the rear end side of the bottom plate 42 abut against the protruding pieces 215, 215 formed at the front end of the closing plate 214 to restrict the movement of the closing plate 214. . When the tape cassette 201 is further inserted into the holder portion 31 after the movement of the closing plate 214 is restricted, only the cassette half 204 is moved inward of the holder portion 31. Due to the relative movement of the cassette half 204 and the closing plate 214, the reel shaft insertion holes 212 and 213 of the cassette half 204 correspond to the insertion holes 218 and 218 of the closing plate 214 as shown in FIG. Be released. Thus, the reel shaft insertion hole 21
The position where the cassette half 204 is inserted until the cassette 2,213 is released is the insertion holding position of the tape cassette 201 in the holder unit 31, and the reel shaft insertion holes 212,213 correspond to the through holes 46,46 formed in the bottom plate 42. Then, the reel shafts 5, 6 can be engaged with the tape reels 205, 206.

As described above, the front lid 210 of the tape cassette 201 in which the reel shaft insertion holes 212 and 213 are opened and inserted and held in the holder portion 31, the lid lock is released by the relative movement of the closing plate 214 and the urging force of the torsion coil spring 211 The front half of the cassette half 204, on which the magnetic tape 207 extends, can be opened by being rotated in opposition.

The cassette holder 3 in which the tape cassette 201 is inserted and held in this manner is rotated from the tape cassette insertable position shown in FIG. 6 in the direction of arrow A in FIG. 6 against the urging force of the torsion coil springs 38, 38. Then, it is moved to the tape cassette mounting position. The mounting height position of the tape cassette 201 inserted and held in the holder portion 31 is regulated by the height positioning pins 9 and mounted on the tape reels 205 and 206 by engaging the reel shafts 5 and 6. When the cassette holder 3 is rotated toward the tape cassette mounting position, the lower end edge of the front lid 210 of the tape cassette 201 is abutted against a lid opening member 58 provided on the mechanical chassis 2. Upon receiving the urging force, the cassette half 204 is rotated to open the front side as shown in FIGS. 7 and 18 against the urging force of the torsion coil spring 211, and the reel lock lever 226 is moved. The tape reels 5 and 6 are unlocked by being moved, and the magnetic tape 207 extended to the front side can be pulled out by the loading operation mechanism.

G-3 Cassette holder lock operation mechanism (FIGS. 1, 3, 4, 5, 6, and 7)
Figure) Cassette holder 3 in the state of being moved to the tape cassette mounting position side on the front end side of mechanical chassis 2
A cassette holder lock mechanism 60 as cassette holder locking means for locking the cassette holder 31 at the tape cassette mounting position is provided at a position facing the front end of the cassette holder. This cassette holder lock mechanism 60
A cassette provided on one side with a lock piece 61 for engaging the locked portion 53 provided on the front end side of the cassette holder 3 rotated to the tape cassette mounting position to lock the cassette holder 3 at the tape cassette mounting position. The holder lock lever 62 is rotatably mounted on the front end side of the mechanical chassis 2. As shown in FIG. 5, the lock lever 62 has a lock piece 61 integrally formed on one side of a rectangular rotating plate 62a having a substantially central portion cut out so as to be orthogonal to the rotating plate 62a.
And a spring engaging piece 62b integrally formed at the upper end on the other side facing the lock piece. The rotating plate 62b
On the base end side, pivot portions 62c, 62c pivotally supported by spindles 63, 63 provided below the front end of the mechanical chassis 2 are formed. On one side of the rotating plate 62a where the lock piece 61 is provided, a switch pressing piece 65 for pressing a cassette holder lock detection switch 64 for detecting the locked state of the cassette holder lock lever 62 of the cassette holder 3 is substantially provided. It is bent in a U-shape and protruded.

As shown in FIGS. 1 and 4, the cassette holder lock lever 62 is locked at the center position in the left-right direction on the front end side of the cassette holder 3 in which the lock piece 61 is rotated to the tape cassette mounting position. With the spring engaging piece 62b facing the position where it can engage with the lock portion 53, the mechanical chassis 2
Of the cassette holder 3 by pivotally supporting the pivots 62c, 62c of the rotating plate 62a on the pivots 63, 63 of the mechanical chassis 2.
It is attached so that it can rotate in the direction perpendicular to 53. Furthermore, a spring locking tongue piece 62d provided at the tip of the spring locking piece 62b
The other end of a tension coil spring 66 having one end locked to a spring locking portion 34a formed in the middle of the chassis frame 34 is locked, and the cassette holder lock lever 62 is
6 and 7, it is urged to rotate toward the cassette holder 3 in the direction of arrow B. Accordingly, the lock lever 62 is pivotally operated to the tape cassette mounting position when the lock piece 61 is pressed by the locked portion 53 of the cassette holder 3 and acts against the urging force of the tension coil spring 66. After the rotation, the rotation returns to the locked portion.
The cassette holder 3 is locked while maintaining the engagement state with 53.

G-4 Ejection Operation Mechanism of Cassette Holder (FIGS. 1, 8, 9, 10, and 11) The cassette holder is locked at the tape cassette mounting position by the cassette holder lock mechanism configured as described above. An eject operation mechanism 67 for releasing the lock of the cassette holder 3 is provided via one chassis frame 34. As shown in FIG. 1, FIG. 8, and FIG. 9, the eject operation mechanism 67 includes an eject operation lever 68 that can move forward and backward with respect to the lock lever 62, and an eject operation lever
An operation knob 69 attached to the shutter 68 for moving and operating the eject operation lever 68, and an eject operation lever return spring 70 for urging the eject operation lever 68 in the direction of arrow C in FIG. Consists of

The eject operation lever 68 is provided on the slide guide pin 7 set on the inner side of the chassis frame 34.
The slide guide holes 72, 72 having a longer diameter in the longitudinal direction are engaged with 1, 71, and the front end side is slidably opposed to the spring locking piece 62b of the lock lever 62 extended on the chassis frame 34. It is attached to the chassis frame. The operation knob 69 is attached by a screw 73 to a mounting piece 68a bent at the upper end side of the eject operation lever 68, and the knob 69a at the tip protrudes outward from a through hole 74 formed in the outer casing 1. Let me. Further, the eject operation lever return spring 70 has one end engaged with a spring engagement hole 75 formed in the base end of the eject operation lever 68 and the other end engaged with a spring engagement hole 76 formed in the chassis frame 34. The eject operation lever is moved and biased in a direction away from the lock lever 62.

Eject operation mechanism 67 configured as described above
Operates the operating knob 69 to move the ejecting operation lever 68 to the ninth position against the urging force of the ejecting operation lever return spring 70.
The cassette holder lock lever 62 is moved by moving the cassette holder lock lever 62 in the direction of arrow D in the drawing and pressing the spring locking piece 62b of the lock lever 62 with the tip of the eject operation lever 68 to pull the cassette holder lock lever 62 to extend the coil spring.
Rotating operation in the direction of arrow E in FIG. 9 against the urging force of 66,
The lock of the lock piece 61 to the locked portion 53 of the cassette holder 3 is released, and the eject operation of the cassette holder 3 is performed.

The operation knob 69 is provided at a position covered by the outer lid 4.

G-5 Outer lid and opening / closing mechanism of outer lid (FIGS. 1, 2, 10, 11, and 12) Also, a rotating magnetic head type audio PCM according to the present invention.
The tape recorder is provided with an outer lid 4 that can be opened and closed independently of the cassette holder 3 described above.
As shown in FIG. 2, the outer lid 4 is formed on a square large enough to cover at least the cassette holder 3 locked at the tape cassette mounting position and to cover the operation knob 69 of the eject operation mechanism 67. As shown in FIGS. 10 and 11, the base end is pivotally supported by a rotating shaft 77 attached to the outer casing 1 so as to be opened and closed by being rotated in the same direction as the rotating direction of the cassette holder 3. It is attached so as to cover the cassette holder 3.

The outer lid 4 locks the eject operation lever 68 of the eject operation mechanism 67 in relation to the opening / closing operation of the outer lid 4 to inhibit the eject operation, or releases the lock of the eject operation lever 68 to perform the eject operation. The eject operation lock plate 78 is rotated and the magnetic tape 207 is loaded onto a predetermined tape path.The loading start switch 79 of the loading operation mechanism is operated. Are linked. That is, the outer lid opening / closing arm 81
Is pivotally supported at one end on a support shaft 82 planted in the middle of the rack plate 80, and the other end is mounted on a mounting piece 83 provided near a pivot portion of the outer lid 4 on one side of the rotation shaft. The outer cover 4 and the rack plate 80 are connected to each other by a pivot 84.

The rack plate 80 is provided with a rack 85 engraved on the lower edge from the front end side to a halfway portion, and a rotating operation pin 86 erected on the ejection operation loading plate 78 so as to hang down at the front end of the rack 85. An operation pin engaging piece 87 to be engaged protrudes, and a switch pressing operation piece 88 that presses a loading start switch 79 is provided on an upper end side facing the operation pin engaging piece 87.
Are bent. The rack plate 80 is connected to one of the chassis frames 34 as shown in FIGS.
A slide guide hole 9 having a major axis extending in the longitudinal direction is formed in slide guide pins 91, 91 erected on an inner surface of the mounting plate 90 attached to the outer surface of the mounting plate 90 facing the chassis frame 34.
2, 92 are engaged and supported so as to be slidable in the front-rear direction of the mechanical chassis 2 over the longitudinal direction of the chassis frame 34. Further, the rack plate 80 is a tension coil spring that is stretched between a spring locking piece 93 formed in the middle of the lower edge and a spring locking piece 94 formed on the lower edge on the rear end side of the mounting plate 90.
The lever 95 is urged to move toward the pivot portion of the rotating shaft 77 of the outer lid 4 behind the mechanical chassis 2 in the direction of arrow F in FIG. Further, the rack 85 of the rack plate 80 has a mounting plate
A pinion 97 protruding from the rack plate 80 side is engaged with a through hole formed in the mounting plate 90 of a spring damper 96 mounted on the outer surface of the 90, and the rack plate 80 is This prevents a sharp return when elastically returning after a movement operation against the urging force.

As described above, the rack plate 80 urged by the tension coil spring 95 to move toward the pivot portion of the outer lid 4 toward the pivot shaft 77 is connected to the outer lid 4 via the outer lid opening / closing arm 81, and the outer lid is opened and closed. The outer lid 4 in which the pivot point of the arm 81 is located closer to the pivot portion with respect to the rotating shaft 77 receives the moving urging force of the rack plate 80, and opens in the direction of arrow G as shown in FIG. Is always urged to rotate. When the outer lid 4 is rotated around the pivotal support portion to the rotating shaft 77 so as to cover the cassette holder 3 moved to the tape cassette mounting position, the outer lid 4 moves to the rack plate 80 of the outer lid opening / closing arm 81. 10 is moved in the direction of the arrow H in FIG. 10 to slide the rack plate 80 in the direction of the arrow H in FIGS. 10 and 11 against the urging force of the tension coil spring 95. The spring damper 96 engaged with the pinion 97 is rotationally biased. Since the spring damper 96 is rotationally biased during the closing operation as described above, a biasing force against the tensile force of the tension coil spring 95 is accumulated in the spring damper 96, and the outer lid 4 rotates sharply when the lid is opened. Is prevented and a soft rotation is guaranteed.

When the outer lid 4 covers the cassette holder 3 and is closed, the lid lock piece 100 of the outer lid opening / closing mechanism 99 is engaged with the lid lock piece 98 provided on one side of the outer lid 4 near the front side. Then, the outer lid 4 is locked in the closed position. The outer lid opening / closing mechanism 99 for locking the outer lid 4 in the closed position is shown in FIG.
(B) and (C), as shown in FIG.
98, a lock claw 100a and a rotating operation piece 100b are provided.
A lid lock piece 100 formed in a letter shape, and the lid lock piece 100
And an opening / closing operation knob 101 for unlocking the outer lid 4 by rotating the knob. And lid lock piece 1
00, the rotating operation piece 100b faces the lid locked piece 98 of the outer lid 4 at the closed position, and the pivotal support portion 100c at the base end pivotally supports the support shaft 102 provided on the outer casing 1. 100a is attached by being rotationally biased by a torsion coil spring (not shown) in the direction in which the lid lock piece 98 is engaged. As shown in FIG. 2, the opening operation member 101 has an opening 105 formed in the upper surface of the outer casing 1.
The knob 101a protrudes from the cover lock piece rotating operation piece 101b protruding from the lower surface side.
12B. The compression coil spring 103, which is slidably supported by the outer casing 1 so as to face the outer casing 1 and is fixed to a part of the outer lid 1 as shown in FIG. The lid lock rotation operation piece 101b is a rotation operation piece 1 of the lid lock piece 100.
It moves and biases in the direction of arrow J in FIG. Note that the movement biasing position of the lid opening operation knob 101 is regulated by a position regulating piece 104 protruding from the outer casing 1.

In the outer lid opening and closing mechanism 99 configured as described above,
When the outer lid 4 is rotated to the closed position, the locking claw 100a of the lid locking piece 100 engages with the frame locked piece 98 to lock the outer lid 4. Also, when the cover opening operation knob 101 is moved against the urging force of the compression coil spring 103, the inclined surface portion 101c of the cover locking piece rotating operation piece 101b gradually closes the cover as shown in FIG. 12 (C). By pressing the rotating operation piece 100b of the lock piece 100, the lid locking piece 100 is rotated in a direction in which the lock claw 100a is separated from the lid locked piece 98, and the outer lid 4 is unlocked. As described above, when the lock is released by operating the lid opening operation knob 101, the outer lid 4 is automatically moved to the lid opening position by receiving the urging force of the tension coil spring 95 for moving and urging the rack plate 80 as described above. Rotation is returned.

The mounting plate 90 has an engaged piece 90a protruding from the lower edge.
The engagement hole 89a of the engagement piece 89 protruding from the chassis frame 34
Then, the screw mounting piece 90b protruding from the upper edge is screwed to the screw fixing piece 89b of the chassis frame 34 with a screw 90c to be mounted on the chassis frame 34.

G-6 Eject Operation Prohibition Mechanism (FIGS. 1, 8, 9, 10, and 11) The outer surface of the chassis frame 34 to which the mounting plate 90 to which the rack plate 80 is mounted is attached. In the vicinity where the eject operation lever 68 is provided, an eject operation lock plate 78 constituting an eject operation prohibition mechanism is attached. This eject operation lock plate 78 is provided in FIG.
As shown in FIGS. 8 and 9, an insertion hole 111 is formed in a substantially sector shape, and a base end portion is provided with an insertion hole 111 through which the pivot shaft 110 is inserted. A locking piece 113 that engages with an engaging piece 112 protruding from the lower edge of the front end side of the eject operation lever 68 is formed to be bent, and the other side of the distal end side facing the locking piece 113 A pivoting operation pin 86 that projects in a direction opposite to the bending direction of the locking piece 113 and is engaged with an operation pin engaging piece 87 provided at the front end of the rack plate 80 is planted. Then, the locking plate 78 is inserted into the substantially fan-shaped opening 114 formed in the chassis frame 34 so that the locking plate 78 faces the engaging piece 112 of the ejecting operation lever 68 so as to face. The moving operation pin 86 is engaged with the operation pin engaging piece 87, and is inserted into the insertion hole 111 through the pivot shaft 110 so as to be rotatably attached to the chassis frame 34. Further, in the ejection operation lock plate 78, the other end of the tension coil spring 116 having one end locked to a spring locking piece 115 formed on the front end side of the mechanical chassis 2 is located on the side where the rotation operation pin 86 is set. The locking piece 113 in the direction indicated by the arrow J in FIG. 8 is engaged with the ejection operation lever 68 by being locked by the spring locking piece 117 bent in the direction opposite to the direction in which the rotation operation pin 86 is erected. It is urged to rotate in the direction of engagement with the mating piece 112.

Therefore, in a state where the eject operation lock plate 78 is not rotated against the urging force of the tension coil spring 116,
As shown in FIG. 8, the locking piece 113 is
The movement operation in the direction of arrow D in FIG. 9 against the ejection operation lever return spring 70 of FIG. 9 is prohibited, the rotation operation of the lock lever 62 is disabled, and the ejection of the cassette holder 3 is prohibited.

When the outer cover 4 is opened and the rack plate 80 is moved in the direction of arrow H in FIG. 11 in front of the mechanical chassis 2 against the urging force of the tension spring 95, the operation pin engaging piece 87 As a result, the rotation operation pin 86 is rotated, the ejection operation lock plate 78 is rotated about the pivot shaft 110 in the direction of arrow K in FIG. 9, and the locking piece 113 is engaged with the ejection operation lever 68. The eject operation lever 68 can be slid and released from the piece 112, and the lock lever 62 can be rotated to perform the eject operation of the cassette holder 3.

G-7 Unlock Prohibition Mechanism of Cassette Holder Lock Mechanism (FIGS. 3, 4, 13 and 14) Further, a rotary magnetic head type audio PC according to the present invention
In the case of the M tape recorder, the cassette holder 3 is ejected when the loading operation mechanism is operating, that is, during the loading operation and the unloading operation of the magnetic tape, and when the magnetic tape 207 is loaded on the tape traveling path. Operated tape cassette 201
A lock release prohibition mechanism 118 that prohibits the lock release operation of the cassette holder lock mechanism 60 is provided to prohibit the removal operation of the cassette holder.

As shown in FIG. 13, the lock release mechanism 118 is engaged with one side of a notch hole 119 formed in the rotary piece 62a of the cassette holder lock lever 62 to inhibit the lock lever 62 from rotating. The rotation prohibition lever 120 and the loading operation mechanism including the movement guide blocks 11 and 12 are moved and the loading operation of the magnetic tape 207 is performed by the rotation of the loading rings 17 and 18. A moving operation lever 121 for rotating the lever 120 is provided.

Then, the rotation prohibition lever 120 is provided as shown in FIGS.
As shown in the figure, a lock claw 120a formed in a substantially L-shape and formed at the tip is
A torsion coil spring 123 wound around the support shaft 122 is supported by a support shaft 122 planted on the lower surface side of the mechanical chassis 2 so as to face a notch hole 119 formed in the support shaft 62a. The lock claw 120a is attached by being urged to rotate in a direction indicated by an arrow L in FIG. 13 in a direction in which the lock claw 120a engages with the notch hole 119. In addition, the moving operation lever 121 is formed such that the rotation prohibition lever rotation operation portion 121a at the distal end is opposed to the rotation operation piece 120b protruding from the other end of the rotation prohibition lever 120, and is bent at the base end side. The pressed piece 121b faces the rotation trajectory of the moving operation pin 124 implanted on the loading ring 17, and a slide guide hole 125 having a long diameter in the longitudinal direction is implanted on one side of the lower surface side of the mechanical chassis 2. The chassis frame 34 is slidably mounted in parallel with the extending direction of one of the chassis frames 34 by engaging with the slide guide shaft 126. This moving operation lever 121 is
A tension coil spring 127 having one end locked to the mechanical chassis 2
Accordingly, the tip rotation-prohibiting lever rotation operating portion 121a is urged to move in the direction of the arrow N in FIG. 13 in a direction away from the rotation-operated piece 120b at the other end of the rotation prohibition lever 120. further,
The movement operation pin 124 on the loading ring 17 is moved to the tape cassette mounting position side where the movement guide blocks 11 and 12, the pinch roller support arm 26, the tape guide support arm 28 and the ten leg arm 30 are separated from the rotary magnetic head device 10. When the loading operation of the magnetic tape 207 is not performed, the pressed piece 120b is pressed to move the moving operation lever 121 against the urging force of the tension coil spring 127 to perform the moving operation of the rotation inhibiting lever 120. The lock pawl 120a is erected at a position where the lock claw 120a is turned in a direction of releasing the engagement with the cassette holder lock lever 62.

Lock release prohibition mechanism 118 configured as described above
The loading ring 17 is rotated in the direction of arrow R in FIG. 13 in the direction of moving the moving guide blocks 11, 12 and the like to the rotary magnetic head device 10 side so as to pull out the magnetic tape 207 from the tape cassette 201. Then, move operation pin 12
4 is separated from the pressed piece 121b of the moving operation lever 121. Then, the moving operation lever 121 is moved in the direction of arrow N in FIG. 13 by receiving the urging force of the tension coil spring 127, and the rotation prohibition lever rotation operation portion 121a at the tip is operated by the tension spring rotation operation of the rotation prohibition lever 120. Separated from the piece 120b, and
13 is rotated and urged in the direction of arrow L in FIG. 13 by the urging force of the torsion coil spring 123, and the lock claw 120a engages with the turning piece 62a of the cassette holder lock lever 62 to release the cassette holder lock lever 62. Lock to prohibit rotation operation.

Accordingly, when the magnetic tape 207 in a state in which the loading operation mechanism is activated is in a state of being pulled out from the tape cassette 201 to the tape traveling path, the cassette holder lock lever 62 is locked and the eject operation of the cassette holder 3 is prohibited. You.

G-8 Tape cassette mounting detection mechanism (FIG. 6, FIG.
(FIG. 14, FIG. 14 and FIG. 15) In the rotating magnetic head type audio PCM tape recorder according to the present invention, the loading operation mechanism is operated in a state where the tape cassette 201 is not properly mounted at the tape cassette mounting position. In order to prevent defective loading of the magnetic tape 207 and damage to the mechanical unit including the magnetic tape 207 or the loading operation mechanism, the cassette holder 3 in which the tape cassette 201 is inserted and held is locked at the tape cassette mounting position, and The loading ring 1 is set on condition that it is detected that the tape cassette 201 has been mounted at the tape cassette mounting position.
A tape cassette mounting detection mechanism is provided which enables driving of a loading motor 21 for rotating a 7, 18 to operate a loading operation mechanism.

The tape cassette mounting detection mechanism includes a cassette holder lock detection switch 64 that is operated by the lock lever 62 to detect that the cassette holder 3 is locked when the cassette holder 3 is locked by the cassette holder lock lever 62; When the tape cassette 201 is mounted at the tape cassette mounting position, a pair of tape cassette mounting detection switches 128, which are operated by the tape cassette 201 to detect the mounting of the tape cassette 201,
Consists of 128.

Then, the cassette holder lock detection switch 64
Is a switch pressing piece which is attached to the front end side of the mechanical chassis 2 and has a pair of contact operators 129a and 129b protruding from one side of the cassette holder lock lever 62 as shown in FIG.
It is arranged so as to engage with the inner side surface of the 65. When the cassette holder lock lever 62 is upright with respect to the mechanical chassis 2 in which the cassette holder lock lever 62 is not operated to rotate against the urging force of the tension coil spring 66, as shown in FIG. The pressing operation is performed by the piece 65 to come into contact with the other contact operation element 129b, and the cassette holder lock detection switch 64 is held in the ON state.

Also, a pair of tape cassette mounting detection switches 128, 12
Reference numeral 8 denotes a symmetrical position centered on the height positioning pin 9 on the mechanical chassis 2, which corresponds to the notches 42 a on both sides on the front end side of the bottom plate 42 of the cassette holder 3, and is inserted and held in the cassette holder 3. The tape cassette 201 is disposed at a position where the tape cassette 201 can be pressed by the bottom surface on the back side protruding from the cassette holder 3.

Then, the cassette holder lock detection switch 64
Is in the ON state as shown in FIG. 15 when the cassette holder lock lever 62 is in the inoperative state, the cassette holder 3 is rotated to the tape cassette mounting position side,
When the lock piece 62 is pressed by the locked portion 53 and the cassette holder lock lever 62 is rotated by a predetermined angle against the urging force of the tension coil spring 66 as shown in FIG. The pressing operation of the operating element 129a is released, and the operation is temporarily turned off as shown in FIG.
When the cassette holder 3 is further rotated to the tape cassette mounting position and the locked portion 53 is engaged with the lock piece 62 and the cassette holder 3 is locked, the cassette holder lock lever 62 receives the urging force of the tension coil spring 66. Then, the switch pressing piece 65 again presses the contact operating element 129a, and the cassette holder lock detection switch 64 is turned on as shown in FIG. That is, the cassette holder lock detection switch 64 locks the cassette holder 3 by the cassette holder lock lever 62 when the cassette holder 3 is turned off once by turning the cassette holder 3 toward the tape cassette mounting position and then turned on again. Detect that it has done.

On the other hand, the tape cassette attachment detection switches 128, 128
When the cassette holder 3 is rotated to the tape cassette mounting position side where the cassette holder lock detection switch 64 is temporarily turned OFF, and then slightly rotated as shown in FIG. 14, the cassette holder 3 is inserted and held in the cassette holder 3. The operator 128a is pressed by the tape cassette 201, and the pressing operation by the tape cassette 201 turns on as shown in FIG. 15 to detect the mounting of the tape cassette 201. At this time, a pair of tape cassette mounting detection switches
128 and 128 are both pressed to output a mounting detection output of the tape cassette 201. As described above, when the pair of tape cassette mounting detection switches 128, 128 located at the left and right symmetric positions are pressed together, the mounting detection output of the tape cassette 201 is output, so that the tape cassette 201 to the tape cassette mounting position is output.
It is possible to reliably detect the correct mounting of the camera.

Then, when the detection outputs of both the cassette holder lock detection switch 64 and the pair of tape cassette mounting detection switches 128, 128 are obtained, the operation of the loading motor 21 is enabled.

G-9 Loading start operation mechanism (FIGS. 1, 10 and 11) Further, in the rotary magnetic head type audio PCM tape recorder according to the present invention, the tape cassette 201 is moved to the tape cassette mounting position. The loading motor 21 is rotated by closing the outer lid 4 which can be rotated independently of the cassette holder 3 following the mounting operation.

That is, a loading start switch 79 operated by a rack plate 80 which is moved by opening and closing the outer lid 4 is mounted via the mounting plate 90. The loading start switch 79 is configured such that the operator 79a faces a switch pressing operation piece 88 of the rack plate 80 facing through a through hole 106 formed in the mounting plate 90, and the rack 4 is closed when the outer lid 4 is closed. The switch 80 is attached to the position where the operation member 79a is pressed by the switch pressing operation piece 88 at the position where the plate 80 is moved.

By providing the loading start switch 79 that is operated in connection with the closing of the outer cover 4 that is closed and covers the cassette holder 3 in this manner, the mounting operation of the tape cassette 201 to the tape cassette mounting position can be reliably performed. After the completion, the operation of the loading operation mechanism can be started with a reliable operation.

G-10 Mounting operation and loading operation of tape cassette Next, a rotating magnetic head type audio PCM according to the present invention
A mounting operation of the tape cassette 201 in the tape cassette mounting position in the tape recorder and the tape cassette 20
The loading operation of the magnetic tape 207 stored in 1 will be described.

First, place the tape cassette 201 in the tape cassette mounting position.
In order to attach the outer cover 4, the outer cover 4 is set to the open position as shown in FIGS. 2 and 10 by operating the cover opening operation member 101 of the outer cover opening / closing mechanism 99. When the outer lid 4 is opened, as shown in FIGS. 9 and 10, the rack plate 80 is moved by the tension coil spring 95, and the engagement of the eject operation lock plate 78 with the eject operation lever 68 is released. This eject operation lever
68 movement operations are enabled. Here, the eject operation lever 68 is moved and the cassette holder lock lever 62 is rotated and operated against the urging force of the tension coil spring 66 to return the cassette holder 3 to the eject position as shown in FIG. .

At this time, the loading rings 17 and 18 are in the inoperative position, and the loading operation mechanisms such as the movement guide blocks 11 and 12 have been moved to the tape cassette mounting position side. Motion prohibition lever 1
20 is rotated against the urging force of the torsion coil spring 123,
The engagement with the cassette holder lock lever 62 is released.

After ejecting the cassette holder 3 as described above, the tape cassette 201 is inserted into the cassette holder 3. When the tape cassette 201 is inserted from the front cover 210 side, the closing plate 214 is moved and the reel shaft insertion holes 212 and 213 on the bottom surface of the cassette half 294 are opened as described above, and the front cover 210 becomes rotatable. The tape reels 205 and 206 are unlocked and become rotatable, and are held at the predetermined insertion holding positions.

Then, the cassette holder 3 in which the tape cassette 201 is inserted and held is rotated to the tape cassette mounting position side, and as shown in FIG.
It turns until the locked part 53 is locked to 62. When the cassette holder 3 is rotated to the tape cassette mounting position, the front cover 210 is rotated by the cover opening portion 58 to open the front side of the cassette half 204, and the magnetic tape 207 can be pulled out by the loading operation mechanism. . Also, the reel shafts 5, 6 provided at the tape cassette mounting position
Are engaged with the tape reels 205 and 206 to be in a rotatable state.

At this time, if the cassette holder 3 is locked by the cassette holder lock lever 62 and the tape cassette 201 is correctly mounted by positioning the mounting height position on the height positioning pin 9, the cassette holder lock detection switch 64 And tape cassette mounting switch 218,
The lock of the cassette holder 3 and the mounting of the tape cassette 210 are detected by 218, and the operation of the loading operation mechanism can be started as described above.

When the tape cassette 201 is mounted at the tape cassette mounting position as described above, the outer lid 4 is closed so as to cover the cassette holder 3 as shown in FIG. When the outer lid 4 is closed, the outer lid 4 is moved via the outer lid opening / closing arm 81.
8 is moved against the urging force of the tension coil spring 95, and the eject operation lock plate 78 engages with the eject operation lever 68 as shown in FIG. Is prohibited, and the eject operation of the cassette holder 3 is disabled. Therefore, once the outer lid 4 is rotated to the vicinity of the closed position, the eject operation by the operation of the eject operation lever 68 cannot be performed.

When the outer lid 4 is closed, the lock start switch 79 is operated by the switch pressing operation piece 88 provided on the rack plate 80 as shown in FIG.
21 starts rotating. When the loading motor 21 is driven to rotate, the loading reels 17 and 18 are operated to rotate,
The loading operation mechanism such as the moving guide blocks 11 and 12 starts operating, and the magnetic tape 207 is removed from the tape cassette 201.
Then, as shown in FIG. 4, a loading operation is performed on a predetermined tape traveling path which can be wound around the rotating magnetic head device 10 and run, thereby completing the loading.

By the way, when the loading motor 21 starts rotating and the loading rings 17 and 18 are rotated, the thirteenth
As shown in the figure, the moving operation lever 1 by the moving operation pin 124
The pressing of 21 is released. Then, as shown in FIG. 13, the moving operation lever 121 is moved by the tension coil spring 127 to release the rotation urging of the rotation prohibiting lever 120. Then, the rotation inhibiting lever 120 is connected to the torsion coil spring 1.
Rotated by 23 and cassette holder lock lever 62
And the rotation of the cassette lock lever 62 is prohibited.
This state is continued until the loading rings 17, 18 return the loading operation mechanisms, such as the moving guide blocks 11, 12, to the inoperative position on the tape cassette mounting position side again.

G-11 Others In the embodiment described above, the rotating magnetic head type audio PC
Although described using the example of the M tape recorder, the present invention
A cassette in which a tape cassette is used as a recording medium, and the tape cassette is held and moved from a position where the tape cassette can be inserted and removed to a position where the tape cassette is mounted so that the tape cassette is mounted at a predetermined tape cassette mounting position. The present invention can be widely applied to a cassette type magnetic recording / reproducing apparatus having a tape cassette transfer body such as a holder.

H. Effects of the Invention As described above, in the present invention, the cassette holder rotated to the tape cassette mounting position is locked by the cassette holder lock lever at the substantially center position on the front end side facing the pivot side. Even when a tape cassette that generates a large elastic return force is inserted and held, the tape cassette is stably held at the tape cassette mounting position without causing distortion, etc., and the tape cassette is stably and accurately positioned at the tape cassette mounting position. It can be attached and held.

Therefore, it is possible to reliably prevent the magnetic tape and the loading operation mechanism from being damaged due to a defective loading.

[Brief description of the drawings]

FIG. 1 is a rotating magnetic head type audio PCM according to the present invention.
FIG. 4 is an exploded perspective view showing a main part of the tape recorder,
FIG. 3 is an external perspective view of the tape recorder, FIG. 3 is a plan view showing a state before the operation of the loading operation mechanism, and FIG. 4 is a plan view showing a state after the operation of the loading operation mechanism. FIG. 5 is a perspective view showing the relative relationship between the cassette holder and the cassette holder lock lever. FIG. 6 is a right side view showing a rotating state of the cassette holder to the position where the tape cassette can be inserted and removed, and FIG. 7 is a right side view showing a rotating state of the cassette holder to the tape cassette mounting position. FIG. 8 is a perspective view showing a non-operation state of the eject operation mechanism, and FIG. 9 is a perspective view showing an operation state of the eject operation mechanism. FIG. 10 is a left side view showing the open state of the outer lid, and FIG. 11 is a left side view showing the closed state of the outer lid. FIG. 12 (A) is a schematic plan view showing the outer lid opening / closing mechanism, FIG. 12 (B) is a front view thereof, and FIG. 12 (C) is a side view showing a lid opening operation state.
FIG. 13 is a perspective view showing a lock release mechanism of the cassette holder lock mechanism. FIG. 14 is a schematic side view showing the operation state of the cassette holder lock detection switch, and FIG.
The figure is a time chart showing the operation states of the cassette holder lock detection switch and the tape cassette attachment detection switch. 16 is a perspective view from the top side of the tape cassette used in the present invention, FIG. 17 is a perspective view from the bottom side of the tape cassette, and FIG. 18 is a perspective view showing the open / close state of the front cover. FIG. 19 is a bottom view showing a moving operation state of the closing plate. 3 cassette holder 4 outer lid 10 rotating magnetic head device 11, 12 moving guide block 31 holder 32, 33 rotating arm 36 support shaft 53 locked part 54 ...... Roller 60 ...... Cassette holder lock mechanism 62 ...... Cassette holder lock lever

Claims (1)

(57) [Claims] A magnetic tape wound around a pair of tape reels rotatably mounted in a cassette main body is drawn out to the front outside of the cassette main body and extends and covers the magnetic tape. A tape cassette having a front lid rotatably mounted on the front side of the cassette main body and urged in a direction covering the magnetic tape by an urging means is inserted and held, and the tape cassette can be inserted and removed. And a cassette holder rotatably supported between the tape cassette mounting position and a front cover of the tape cassette inserted and held in the cassette holder when the cassette holder is rotated to the tape cassette mounting position. Front lid opening support means for supporting the cassette body in a state in which the front side of the cassette body is opened against the urging force of the urging means; A cassette holder locking means for engaging the cassette holder at a substantially center position on a front end side opposite to the pivot side of the cassette holder when the rudder is rotated to the tape cassette mounting position and locking the cassette holder at the tape cassette mounting position; A tape cassette mounting device in a cassette type magnetic recording / reproducing device provided with a.