JP2605360B2 - Tape cassette mounting 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 D. Problems to be solved by the invention E. Means to solve the problems F. Function G. Embodiment G-1 Digital audio tape recorder Tape cassette used (FIGS. 20 to 23) G-2 Schematic configuration of digital audio tape recorder (FIGS. 1 and 2) G-3 Cassette holder (FIGS. 1 to 6) G-4 Slide Guide frames (FIGS. 1, 2 and 5)
Fig. G-5 Reciprocating operation mechanism of slide guide frame (Fig. 1,
G-6 Tape cassette insertion holding detection mechanism (FIGS. 1, 2, 6, 8, 13 and 14) G-7 Front cover of tape cassette Opening mechanism (FIGS. 2, 6, 8, 15, 16, and 17) G-8 Tape cassette ejecting mechanism (FIGS. 1, 2, 7, 7, and 9) G-9 Tape cassette mounting operation (FIGS. 1, 5 to 11) G-10 Tape cassette removal operation (FIGS. 1, 5)
FIGS. 11 to 19) H. Effects of the Invention A. Industrial Field of the Invention The present invention relates to the above cassette by moving a cassette holder into which a tape cassette is inserted and held in a horizontal direction and a vertical direction. The present invention relates to a tape cassette mounting apparatus applied to a magnetic recording / reproducing apparatus for a cassette type tape recorder or the like in which a tape cassette inserted and held in a holder is mounted at a predetermined tape cassette mounting position.

B. Summary of the Invention The present invention provides a tape cassette in which a cassette holder in which a cassette is inserted and held is vertically movably reciprocated by a drive motor to move the cassette holder horizontally and vertically. Let
What is claimed is: 1. A tape cassette mounting device for mounting a tape cassette inserted and held in said cassette holder to a predetermined tape cassette mounting position in an apparatus main body, wherein a driving force transmitting mechanism for transmitting a driving force of said driving motor to a slide guide frame. When the slide guide frame is reciprocated by the drive motor, an excessive load is not applied to the slide guide frame, and the tape cassette mounting operation can be performed smoothly. It is like that.

C. Conventional technology Conventionally, a tape cassette is operated to reciprocate by a drive motor a slide guide frame supporting a cassette holder to be inserted and held in a vertically movable manner, thereby moving the cassette holder in a horizontal direction and a vertical direction, A tape cassette mounting device for mounting a tape cassette inserted and held in the cassette holder at a predetermined tape cassette mounting position in the apparatus main body has been proposed and used.

In this type of tape cassette mounting apparatus, the driving force of the driving motor is transmitted to the slide guide frame via a driving force transmission mechanism including a plurality of gears such as a worm gear and a rack gear. And
The slide guide frame is reciprocated via a driving force transmission mechanism when a drive motor is driven, and the cassette holder supported by the slide guide frame is moved horizontally and vertically to operate the cassette. The tape cassette inserted and held in the holder is mounted at a predetermined tape cassette mounting position, or is transferred from the tape cassette mounting position to a removable position.

D. Problems to be Solved by the Invention By the way, in the tape cassette mounting device in which the slide guide frame is reciprocated by the drive motor to move the cassette holder as described above, the tape cassette is securely connected to the tape cassette. In order to mount the tape cassette at the mounting position, it is necessary to surely move the cassette holder into which the tape cassette is inserted and held to the tape cassette mounting position. To reliably move the cassette holder to the position, the slide guide frame for moving the cassette holder must be reliably moved to a predetermined moving position with a predetermined driving force. Therefore, the drive control of the drive motor is performed so as to reliably move the slide guide frame to a predetermined stop position in the reciprocating direction.

However, the inertia driving force acts on the drive motor even if the power is cut off. Therefore, even after the slide guide frame has reached the predetermined stop position, a driving force acts on the slide guide frame and an excessive load is applied. At this time, if the slide guide frame is forcibly stopped by mechanical stopping means, the excessive load may be caused by a plurality of worm gears, rack gears, or the like that transmit the driving force of the drive motor to the slide guide frame. In addition to the driving force transmission mechanism constituted by the gears, a so-called tightening phenomenon occurs due to biting between the gears constituting the driving force transmission mechanism, and the smooth rotation of the driving force transmission mechanism may be hindered. In particular, in the case where the worm gear is used for the driving force transmission mechanism, a biting phenomenon easily occurs between the worm gear and the gear meshing with the worm gear, and the smooth rotation of the driving force transmission mechanism is hindered. .

Accordingly, the present invention enables a smooth reciprocating operation by a drive motor of a slide guide frame for moving and operating a cassette holder into which a tape cassette is inserted and held, thereby enabling a reliable mounting operation of the tape cassette to a tape cassette mounting position. The present invention has been proposed for the purpose of providing a tape cassette mounting device that makes it possible to control the stop position of the slide guide frame and to easily control the drive of the drive motor that moves the slide guide frame.

E. Means for Solving the Problems In order to achieve the above-described object, the present invention provides a cassette holder in which a tape cassette is inserted and held, and a cassette holder in which the cassette holder is vertically movably supported and which is mounted on the apparatus body side. A first position at which the cassette holder can be inserted and removed by the reciprocating operation; a reel drive shaft insertion hole opened at the bottom of the tape cassette; A slide guide frame for moving the cassette holder up and down at the second position with a reel drive shaft disposed between the slide guide frame and a side surface of the slide guide frame. The slide guide frame is supported so as to be slidable in the reciprocating direction of the slide guide frame. A rack support plate slidably biased to the other side and movably supported in the reciprocating direction of the slide guide frame, and urged by a second limiter spring to move in the other direction in the reciprocating direction of the slide guide frame. The rack plate supported by the slide guide frame by locking the end in the biasing direction side to the rack support plate, and a pinion gear meshing with the rack portion of the rack plate are rotated to reciprocate the slide guide frame. It is configured to include a drive motor that operates dynamically.

F. Action The present invention is characterized in that the slide guide frame is moved in one of the reciprocating directions by the drive motor and is stopped at a predetermined stop position, and then the drive force of the drive motor is further applied to the slide guide frame. The first limiter spring extends to move the rack support plate and the rack plate supported by the rack support plate with respect to the slide guide, and the drive motor moves the slide guide frame in one of the reciprocating directions. After being operated and stopped at the predetermined stop position, when the driving force of the drive motor is further applied to the slide guide frame, the second limiter spring is extended and the rack plate is moved with respect to the slide guide frame. .

Then, even if the slide guide frame is moved in any of the reciprocating directions, an excessive load on the slide guide frame is prevented. When the first or second limiter spring is extended, a force in the return direction is applied to the rack plate, so that a rotational force in the return direction is also applied to the pinion gear meshing with the rack portion of the rack plate.

G. Embodiment Hereinafter, an example in which the present invention is applied to a digital audio tape recorder equipped with a rotating magnetic head device will be described.

G-1 Tape Cassette Used in Digital Audio Tape Recorder (FIGS. 20 to 23) Tapes used in the above-mentioned tape recorder to provide a specific description of a digital audio tape recorder to which the present invention is applied. The cassette will be described.

The tape cassette has a structure that can be hermetically closed at the time of non-use such as storage, which is not mounted on the tape recorder, in order to completely protect the magnetic tape housed in the cassette half.

That is, the tape cassette 1 corresponds to FIG.
As shown in the figure, a pair of tape reels 5,
The magnetic tape 6 is rotatably supported, and the magnetic tape 7 is wound and stored between the tape reels 5 and 6. The magnetic tape 7 extends outwardly on the front side of the cassette half 4 through tape outlets 8 and 9 formed on both sides on the front side of the cassette half 4, and extends from one tape reel 5 to the other tape reel. 6 are wound. On the front side of the cassette half 4, a front cover 10 is rotated to protect the magnetic tape 7 extending to the front side of the cassette half 4 when the tape cassette 1 is not mounted on the tape recorder. Mounted freely. This front cover 10
As shown in FIG. 22, the cassette half 4 is rotated by a torsion coil spring 11 which is an urging means wound around a rotating shaft 10a.
Of the magnetic tape 7 extending toward the front side of the cover.

Further, on the bottom side of the cassette half 4, FIG.
As shown in FIGS. 22 and 23, when the tape cassette 1 is not mounted on the tape recorder, the reel drive shaft insertion holes 12, 13 formed on the bottom side of the cassette half 4 are closed to close the cassette half. A closing plate 14 having a U-shaped cross section for preventing invasion of dust and the like into the inside 4 and protecting the magnetic tape 7 is slidably mounted in the front-rear direction. A pair of projecting pieces 15, 15 project from the front edge of the closing plate 14, and a torsion spring 16 is attached to the cassette half 4 as shown in FIG.
When it is urged toward the front side of the cassette half 4 in the direction of closing the reel drive shaft insertion holes 12 and 13 by the
As shown in FIG. 23, the closing position of the closing plate 14 is restricted by being locked on the front side of the cassette half 4. At the lower end edge of the front cover 10 corresponding to the protruding pieces 15, 15, notched concave portions 17, 17 serving as escape portions when the cassette half 4 moves relative to the closing plate 14 are formed. .

Further, a pair of insertion holes 18 and 1 are provided on the main surface of the closing plate 14.
8 is drilled, and this closing plate 14
23, the insertion holes 18, 18 are aligned with the reel drive shaft insertion holes 12, 13 formed in the bottom plate of the lower half 3, as shown by a two-dot chain line in FIG. A reel drive shaft provided on the tape recorder side can enter the cassette half 4. Then, the closing plate 14 is moved forward, and the magnetic tape 7 formed on the front side of the cassette half 4 is pulled out of the cassette half 4 to perform a loading operation. As shown in FIG. 21, the lower surface of the space portion 19 facing the means,
In the closed state, the insertion holes 18 and 18 of the closing plate 14 and the reel drive shaft insertion holes 12 and 13 of the lower half 3 are shifted from each other, and the reel drive shaft insertion holes 12 and 13 are 1 is closed at the main surface.

Further, the closing plate 14 is formed on a bottom plate of a cassette holder provided in a tape recorder described later.
A concave groove 20 is formed in which a projection, which is an unlocking means for unlocking the locking means, enters. This concave groove 20
Is formed by opening the front end side of the closing plate 14 over a middle part in the front-rear direction which is the moving direction of the closing plate 14. In the concave groove 20, the closing position where the closing plate 14 closes the space 19 of the cassette half 4 and the reel drive shaft insertion holes 12, 13 and the space 19 and the reel drive shaft insertion hole 1
An engaging hole 23 and an engaging notch 24 are formed in the cassette half 4 for locking the closing plate 14 at the open position where the closing plates 2 and 13 are opened. . The lock piece 21 has a rear end connected to the bottom plate of the lower half 3 by forming a U-shaped notch in the bottom plate of the lower half 3 and integrally having a hemispherical engagement projection 22 on the lower surface of the front end. Has formed.

Then, as shown in FIGS. 21 and 23, when the closing plate 14 is closed, the locking projection 22 at the tip of the lock piece 21 engages with the engaging hole 23 provided in the closing plate 14, The closing plate 14 is locked so as not to move toward the open position.

Furthermore, in the cassette half 4, the tape reels 5, 6 rotatably supported in the cassette half 4 rotate carelessly when the tape half is not mounted on the tape recorder, and the magnetic tape 7 wound therearound is provided. As shown in FIG. 20, a reel lock lever 26 extending over the inner surface of the upper half 2 in the width direction to prevent the reel half from being loosened and being damaged is provided on the inner surface of the upper half 2. The elongated holes 28, 28 are engaged with the pair of slide guide pins 27, 27 so as to be slidably supported in the front-rear direction with respect to the tape reels 5, 6, and the above-described structure is realized by the torsion coil spring 29 attached to the inner surface of the upper half 2. The tape reels 5 and 6 are attached to the tape reels 5 and 6 while being urged to move. Then, pressing pieces 30, 3 protruding from one side of the reel lock lever 26 are provided.
The tape reels 5 and 6 are non-rotatably locked by pressing 0 on the outer peripheral surfaces of the upper ends of the tape reels 5 and 6. On both sides of the reel lock lever 26, a moving operation arm 31 which engages with the rotating piece 10b of the front cover 10 when the front cover 10 is opened is extended in the front-rear direction on the side surface of the cassette half 4. It is formed so that it does. And
When the front cover 10 is turned to open the front side of the cassette half 4 as shown in FIG. 22, the moving operation arm 31 is moved forward of the cassette half 4 by the turning piece 10b of the front cover 10. Then, the reel lock lever 26 is moved in a direction away from the tape reels 5, 6 against the urging force of the torsion coil spring 29. By the operation of moving the reel lock lever 26, the pressing of the tape reels 5, 6 by the pressing pieces 30, 30 is released, and the tape reels 5, 6 become free to rotate, so that the magnetic tape 7 moves outward of the cassette half 4. Allows for payout.

Further, on the upper surface side of the cassette half 4, the front cover 10
An engagement recess 32 having a square shape is formed at the center in the left-right direction at a position closer to the side. The engaging recess 32 is formed at the tip of the blowing operation lever in the tape cassette mounting device in which the tape cassette 1 is pulled from the tape cassette insertion / removal position to the tape cassette mounting position using the pulling operation lever. It is provided so that the engaging claw can be engaged.

The tape cassette 1 configured as described above is mounted in the tape recorder main body via a cassette holder that is moved and operated in a horizontal direction and a vertical direction between a tape cassette insertion / removal position and a tape cassette mounting position as described later. At the tape cassette mounting position.

Then, the tape cassette 1 is inserted into the cassette holder and held by the cassette half 4 and the closing plate 14.
Relative opening operation of the reel drive shaft insertion holes 12 and 13 is performed, and the front cover 10 is rotated by the rotation operation of the cassette holder to the tape cassette mounting position, so that the front surface of the cassette half 4 is Open the magnetic tape 7
To the outside so that it can be pulled out.

G-2 Schematic Configuration of Digital Audio Tape Recorder (FIGS. 1 and 2) A digital audio tape recorder equipped with a rotary magnetic head device to which the present invention is applied records a tape cassette 1 configured as described above. As shown in FIG. 1, FIG. 2, FIG. 3, and FIG.
A cassette holder 35 in which the tape cassette 1 is inserted and held, and the cassette holder 35 is vertically movably supported and reciprocally supported by a mechanical chassis 36 constituting a tape recorder main body. The cassette holder 35 can be inserted into and removed from the cassette holder 35 by reciprocating operation by the motor 37, and the reel drive shaft insertion holes 12 and 13 opened on the bottom surface of the tape cassette 1. And a slide guide frame 40 for vertically operating the cassette holder 36 at a second position corresponding to the reel drive shafts 38, 39 positioned so as to be set on the mechanical chassis 36. I have.

The reel drive shaft 3 on which the tape cassette 1 is mounted
As shown in FIG. 1, the magnetic tape 7 pulled out from the tape cassette 1 via the mechanical chassis 36 is wound on the side opposite to the tape cassette mounting position where the tape cassettes 8 and 39 are disposed. A magnetic head device 42 is provided. Then, between the tape cassette mounting device and the rotary magnetic head device 42, a pair of loading operation mechanisms constituting a loading operation mechanism that draws out the magnetic tape 7 from the tape cassette 1 and winds and runs around the tape guide drum of the rotary magnetic head device 42. Movement guide blocks 43 and 44 are provided. A magnetic tape 7 is wound around these moving guide blocks 43 and 44, and the magnetic tape 7 is wound around a tape guide drum of the rotary magnetic head device 42 over a predetermined angle, for example, an angle range of about 90 °. A tape guide roller 45 and an inclined guide pin 46 for guiding the tape are provided. The moving guide blocks 43 and 44 are guided by slide guide grooves 47 and 48 formed in the mechanical chassis 36, and the tape cassette in which the tape guide roller 45 and the inclined guide pins 46 are mounted at the tape cassette mounting position. The moving operation is performed between a position facing the space 19 and a position extending to the side of the rotary magnetic head device 42. The moving operation of the moving guide blocks 43, 44 is performed by the rotational driving of two loading rings 49, 49 disposed around the outer periphery of the rotary magnetic head device 42. That is, each of the moving guide blocks 43, 44
Are connected to the loading rings 49, 49 by connecting arms (not shown), and are moved by rotating the loading rings 49, 49 by the loading motor 52. Each of the loading rings 49 is connected to a loading motor 52 so as to receive a driving force via a connection gear mechanism 53 and a connection belt 54.

In addition, the position of the tape cassette device and the rotating magnetic head device
A pinch roller 56 that presses against the capstan shaft 55 to drive the magnetic tape 7 at a constant speed, a tape guide support arm 57, and a ten leg arm that constitutes a tension regulator (not shown) are rotatably disposed between the pins 42. ing. The pinch roller 56, the tape guide support arm 57, and the ten leg arm are moved to the tape cassette mounting position side by the rotation of the loading rings 49, 49 for moving the moving guide blocks 43, 44, and the rotating magnetic head device 42. Pivoted between the pivoted positions,
The magnetic tape 7 in the tape cassette 1 is rotated with the movement of the moving guide blocks 43 and 44, and the magnetic tape 7 is wound around the rotary magnetic head device 42 to perform a loading operation on a predetermined tape traveling path that can travel.

As shown in FIG. 2, tape cassette mounting detection switches 33, 33 for detecting the mounting of the tape cassette 1 are provided at the tape cassette mounting position on the mechanical chassis 36 where the reel drive shafts 38, 39 are disposed. Are arranged.

G-3 Cassette Holder (FIGS. 1 to 6) The cassette holder 35 constituting the tape cassette mounting device 41 described above has a substantially open front and rear side so that the tape cassette 1 can be inserted and held. It is formed in a box shape. That is, the cassette holder 35 is
As shown in FIGS. 1 and 2, a bottom plate 60 on which the tape cassette 1 is placed, side plates 61, 62 formed on both sides of the bottom plate 60, and a pair of side plates 61, 62 disposed opposite to the bottom plate 60. And is formed in a substantially box shape by an upper surface plate 63 attached over the entire surface. In the center of the bottom edge of the bottom plate 60 on the front edge side, the reel drive shaft
A notch 64 for entry of the reel drive shaft into which the tape cassette 8 and 39 enter is formed, and a notch 65 having an inverted trapezoidal shape is formed at the center of the rear end side, and the tape cassette 1 is closed at both ends of the notch 65. Board
Sliding restricting protruding pieces 66, 66 that contact the protruding pieces 15, 15 provided on 14 and restrict the movement of the closing plate 14, are formed to rise.
Further, a lock piece 21 for locking the closing plate 14 of the tape cassette 1 is provided at a position closer to the side plates 61, 62 of the bottom plate 60.
A pair of protruding ridges 67, 67 for pressing the boss is formed to bulge.

A pair of cassette pressing support pieces 68, 68 for elastically pressing and supporting the tape cassette 1 inserted and held in the cassette holder 33, as shown in FIGS. It is provided so as to extend in the insertion direction of the cassette 1. These cassette pressing support pieces 68, 6
8 is formed integrally with a part of the upper surface plate 63 so as to be elastically displaceable by forming U-shaped cuts 69, 69 in the upper surface plate 63. The cassette pressing support plate 68, 68
The tape cassette pressing protruding portions 70, 70 made of synthetic resin are protruded inward of the cassette
Is installed. The cassette pressing plate support piece
68, 68 uniformly press the vicinity of the upper side of the tape cassette 1 inserted and held in the cassette holder 35 and the vicinity of the position corresponding to the concave grooves 20, 20 formed in the closing plate 14 of the tape cassette 1. So that they are mounted in symmetrical positions.

Further, the tape cassette 1 is elastically engaged with the engaging recess 32 formed on the upper surface of the cassette half 4 of the tape cassette 1 inserted into the cassette holder 35 at the central portion on the rear side of the upper plate 63. An engagement pressing support piece 71 is provided so as to press and support it. As shown in FIG. 2, the engagement pressing support piece 71 has a pair of cuts at one rear end side of the upper surface plate 63.
By forming 72, 72, it is formed so as to protrude from one back side of the upper surface plate 63, and can be elastically displaced. An engaging projection 73 made of a synthetic resin that engages with the engaging recess 32 on the upper surface of the cassette half 4 is provided at the tip thereof.
Is installed. The engaging projection 73 is formed by locking the closing plate 14 with the sliding regulating protrusions 66, 66, and moving the cassette half 4 relative to the closing plate 14, so that the reel drive shaft insertion holes 12, 13 are provided.
The tape cassette 1 is in the cassette holder with the
It is attached at a position where it engages with the engaging recess 32 when it is inserted and held in 35.

The tape cassette 1 is inserted into the cassette holder 35 formed as described above from the front cover 10 side as shown in FIG. When the tape cassette 1 is inserted in the direction of arrow A in FIG. 3 along the bottom plate 60 of the cassette holder 35, the tape cassette 1 is inserted into the side plates 61 and 62 of the cassette holder 35 in the left-right direction. The insertion is restricted in position, and as shown in FIG. 3, is sandwiched between the bottom plate 60 of the cassette holder 35 and the cassette pressing support pieces 68, 68. When the tape cassette 1 is further inserted into the cassette holder 35 in the direction of arrow A in FIG. 3, the ridges 67, 67 formed on the bottom plate 60 are recessed on the closing plate 14 of the tape cassette 1. The lock piece 21 that engages with the groove 20 and locks the closing plate 14 to the cassette half 4 is pushed up into the cassette half 4 to close the reel drive shaft insertion holes 12 and 13 of the closing plate 14. Release the lock at the closed position. Subsequent to the release of the locking of the closing plate 14, the sliding restricting protrusions 66, 66 on the rear end side of the bottom plate 60 have the
The movement of the closing plate 14 is restricted by abutting on the members 5 and 15. When the tape cassette 1 is further inserted into the cassette holder 35 in the direction of arrow A in FIG. 3 after the movement of the closing plate 14 is restricted, only the cassette half 4 is inserted into the cassette holder 35 as shown in FIG. Moved to Due to the relative movement between the cassette half 4 and the closing plate 14, the reel drive shaft insertion holes 12, 13 of the cassette half 4 correspond to the insertion holes 18, 18 of the closing plate 14 as shown in FIG. The drive shaft insertion holes 12, 13 are opened. The cassette half 4 until the reel drive shaft insertion holes 12 and 13 are thus opened.
Is the insertion and holding position of the tape cassette 1 in the cassette holder 35, and the reel drive shaft insertion hole
Notch 64 for entering the reel drive shaft formed on 12, 13 and bottom plate 60
Corresponds to the reel drive shaft 38,
The engagement of 39 is possible.

As described above, when the reel drive shaft insertion holes 12 and 13 are opened and the tape cassette 1 is inserted and held,
Reference numeral 71, as shown in FIG. 4, engages the engaging projection 73 at the tip with the engaging recess 32 on the upper surface of the cassette half 4 to press and support the tape cassette 1. Therefore, the tape cassette 1 inserted into the cassette holder 31 is the cassette half 4
Are pressed and supported by a pair of cassette pressing support pieces 68, 68, and the center in the left-right direction is pressed and supported by an engagement pressing support piece 71, and is held by the cassette holder 35. As a result, the tape cassette 1 is prevented from rising near the center, and even if deformed, the deformation is corrected and the tape cassette 1 is stably inserted and held tightly on the bottom plate 60. In particular, the cassette holder 35 holds the tape cassette 1 by relatively engaging the engagement recess 32 on the upper surface of the cassette half 4 with the engagement projection 73 at the tip of the engagement pressing support piece 71. In addition, the insertion / holding position of the tape cassette 1 is accurately regulated, and the tape cassette 1 can be reliably held by preventing the tape cassette 1 from coming off.

As shown in FIGS. 2, 5, and 6, the cassette holder 35 for inserting and holding the tape cassette 1 has a pair of slides protruding from the upper edges of the side plates 61 and 62, respectively. Guide support pins 74, 74 and 75, 75 are inserted into cassette holder slide guide grooves 78, 78 and 79, 79, each of which is drilled in pairs on support side plates 76, 77 mounted so as to be erected on both sides of the mechanical chassis 36, respectively. Mounted to support.

By the way, each cassette holder slide guide groove
78, 78 and 79, 79 are supporting side plates 76, 77 as shown in FIG.
Horizontal guide grooves 78a, 78a and 79a, 79a drilled from the front end side toward the middle part on the inward side, and these horizontal guide grooves
Vertical guide grooves 78b, 78b and 79b, 79b drilled vertically downward from the inward ends of 78a, 78a, 79a, 79a are formed in an L-shape. The cassette holder slide guide grooves 78, 78 and 79, thus formed,
The cassette holder 35, which is supported by inserting the slide guide support pins 74, 74, 75, and 75 through 79, has the slide guide support pins 74, 74, and 75, 75 in the cassette holder slide guide grooves 78, 78, and 79. , 79 horizontal guide grooves 78a,
Vertical guide grooves 78b, 78b and 7 from the front end side of 78a, 79a and 79a
A first position at which the tape cassette 1 can be inserted and removed by being guided to move to the lower end side of 9b and 79b, and a reel drive shaft insertion hole opened at the bottom of the tape cassette 1. The tape reels 5 and 6 are operated to move in the horizontal direction between the corresponding second positions of the reel drive shafts 12 and 13 and the reel drive shafts 34 and 35 and in the vertical direction for engaging and disengaging the tape reels 5 and 6 with the drive shafts 34 and 35.

G-4 Slide guide frame (FIGS. 1, 2 and 5)
Figure) Cassette holder slide guide groove 78,7 as described above
The movement of the cassette holder 35, which is guided in the horizontal and vertical directions by being guided by 8 and 79, 79, is performed by the slide guide frame 40 supported reciprocally in the horizontal direction via the support side plates 76, 77. The reciprocating operation is performed.

As shown in FIGS. 2 and 5, the slide guide frame 40 for moving the cassette holder 35 is provided with a connecting support plate.
A rack gear 81 to which a driving force from the driving motor 37 is transmitted to one side of 80 is attached so that a rack gear mounting side plate 83 to which a rack plate 82 formed on one side is attached is hung down,
On the other side, a slide side plate 84 is bent so as to hang down and is formed in a substantially U-shape. Rack gear mounting side plate
A pair of slide guide grooves 86, 86 respectively engaged with a pair of slide guide pins 85, 85 implanted in one support side plate 76 are formed on the inner side of the inner side opposed to the slide side plate 84 of 83 in the longitudinal direction. A perforated slide guide block 87 made of synthetic resin is attached. The slide side plate 84 also has a pair of slide guide grooves 89, 89 in which a pair of slide guide pins 88, 88 erected on the other support side plate 77 are respectively engaged. I have. The slide guide frame 40 engages slide guide pins 85, 85 with slide guide grooves 86, 86 formed in the slide guide block 87, and slides into slide guide grooves 89, 89 formed in the slide side plate 84. The slide guide pins 85, 8 are attached by engaging the pins 88, 88 so as to be inserted between the pair of support side plates 76, 77.
The slide guide grooves 86, 86 and 89, 89 are guided by 5 and 88, 88 and reciprocate in the horizontal direction with respect to the mechanical chassis 36.

Further, the slide guide frame 40 is maintained in a horizontal state with respect to the mechanical chassis 36, and a pair of opening / closing arms 91, which are pivotally supported by a pivot 90 at a central portion thereof and can be freely opened and closed so that they can be reciprocated in parallel with certainty. As shown in FIG. 2, it is connected to the supporting side plates 76 and 77 via 92. One of the opening / closing arms 91 has a mounting support piece bent at one end on the front end side upper surface of the other support side plate 77 as shown in FIG.
An opening / closing guide shaft 95, which is rotatably supported on a fixed support shaft 94 planted at 93 and is planted so as to hang down at the other end, is bent at the upper edge of the rack gear mounting side plate 83 of the slide guide frame 40. The bent piece 96 is engaged with a long hole 97 having a long diameter in a direction perpendicular to the moving direction of the slide guide frame 40 to connect the slide guide frame 40 and the other support side plate 77 as shown in FIG. The other opening / closing arm 92 has a slide guide frame at one end.
Mounting support piece bent at the upper edge of 40 slide side plates 84
An open / close guide shaft 100, which is rotatably supported on a fixed support shaft 99 planted at 98 and is erected at the other end, is bent at the upper edge of the front end side of one of the support side plates 76. The curved piece 101 is engaged with a long hole 102 having a long diameter in a direction perpendicular to the moving direction of the slide guide frame 40, and connects the slide guide frame 40 and one of the support side plates 76.

As described above, the pair of opening / closing arms 91, 92, each of which is supported by fixing one end thereof to the fixed support shafts 94, 99 and engaging the opening / closing guide shafts 95, 100 of the other end with the elongated holes 97, 102, is mounted on the fixed support shafts 94, 99. Axis 94,
With one end pivotally supported by the 99 as a fixed fulcrum, the opening / closing operation is performed about the pivot 90 while the opening / closing guide shafts 95, 100 are slidably guided by the long holes 97, 102. In this way, one end side is fixed
9 support side plate by a pair of opening and closing arms 91, 92 supported by
The slide guide frame 40 connected to 76, 77
The reciprocating operation is performed in parallel with the mechanical chassis 32 with the 4,99 side as a slide reference.

The slide guide frame 40 supported reciprocally with respect to the mechanical chassis 32 in this manner includes the slide guide frame 40.
The cassette holder 31 is supported so as to be moved in the horizontal and vertical directions following the reciprocation of the cassette holder. That is, the cassette holder 31 is provided with a reel driving shaft opened from the first position shown in FIGS. 1, 5 and 6 which enables the tape cassette 1 to be inserted and removed from the bottom of the tape cassette 1. The seventh corresponding to the insertion holes 12, 13 and the reel drive shafts 38, 39
The tape reels 5 and 6 are attached to the reel drive shafts 38 and 39 in the horizontal direction between the second positions shown in FIGS. 8 and 8 and as shown in FIGS. 8, 9, 10 and 11. It is supported by the slide guide frame 40 so that it can be operated to move in a range extending up and down to be disengaged.

Therefore, a pair of inclined cam grooves 105, 105 and 106, 106 are formed in the slide guide block 87 and the slide side plate 84 of the slide guide frame 40, respectively, as shown in FIG. 2, FIG. 5, and FIG. The cassette holder 35 is provided with a slide guide groove 7 formed in each of the support side plates 76 and 77.
Slide guide support pin 6 inserted through 2,72, and 73,73
8, 68 and 73, 73 the tip of the inclined cam groove 105, 105 and 106,
The slide guide frame 40 supports the slide guide frame 40 so as to be moved in the horizontal direction and the vertical direction as described above by being engaged with the respective 106s.

By the way, the slide guide frame 40 has a pair of open / close arms.
The legs 91 and 92 are opened as shown in FIGS. 7 and 9,
Slide guide pins 85, 85 and 88, 88 are slide guide grooves
During the forward movement in the direction of arrow B in FIGS. 1 and 6 in the range of 86, 86 and 89, 89, insertion and removal of the tape cassette 1 at the position where the cassette holder 31 is advanced with respect to the mechanical chassis 36. The slide guide support pins 74, 74 and 75, 75 are guided in the cassette holder slide guide grooves 78, 78 and 79, 79 from the first position shown in FIGS. The lead drive shaft insertion holes 12, 13 opened in the bottom portion of the inner tape cassette 1 and the reel drive shafts 34, 35 are moved to the corresponding second positions shown in FIGS. 7 and 8, Further, at the second position, the tape reel
An operation is performed to lower the reel drive shafts 5 and 6 so as to engage them with the reel drive shafts 34 and 35. That is, the pair of open / close arms 91 and 92 are closed, and the slide guide pins 85, 85 and 8 are closed.
5 and 8 when the slide guide frame 40 has been moved to a position advanced to the mechanical chassis 36 in which 8,88 are located at the inner ends of the slide guide grooves 86,86 and 89,89. As shown in FIG. 6, the cassette holder 35 has a first slide guide support pin 74, 47 and 75, 75 positioned at the front end side of the cassette holder slide guide groove 78, 78 and 79, 79.
It is supported at the position.

Therefore, the inclined cam grooves 105, 105 and 106, 106 are moved to the first position shown in FIG. 1 and FIG.
When the cassette holder 40 and the cassette holder 35 are located, the slide guide support pins 74, 74 and 75, 75 are engaged with the upper edge, and the cassette holder 35 is moved from the first position to the third position as shown in FIGS. During the operation to move to the position 2, the engagement state is maintained so that the operation can be performed integrally with the slide guide frame 40. That is, the inclined cam groove 10
5, 105 and 106, 106, the slide guide frame 40 further moves in the forward direction in the direction of arrow B in FIGS. 7 and 8 after the cassette holder 35 reaches the second position as shown in FIGS. Then, the slide guide support pins 74, 74 and 75, 75 are connected to the vertical guide groove portions 72 of the slide guide grooves 72, 72 and 73, 73.
b, 72b and 73b, 73b to guide the cassette holder
As shown in FIGS. 5 and 6, a slide guide block is provided over the height range of the vertical guide grooves 72b, 72b and 73b, 73b so as to be able to lower the 35 to the tape cassette mounting position side. The holes 87 and the slide side plates 84 are formed with a predetermined inclination angle from the upper edge side to the lower edge side. The inclination angles of these inclined cam grooves 105, 105 and 106, 106 are as follows:
The vertical guide grooves 72b, 72b and 73b, 73b have an inclination angle corresponding to the hypotenuse of an isosceles triangle having one side as a height, and the slide guide frame 40 is provided with the vertical guide grooves 72b, 72b, and 73.
The cassette holder 35 can be lowered to the tape cassette mounting position side by moving forward by the height of b, 73b.

A lid opening / closing arm 107 for opening and closing a tape cassette insertion / removal lid (not shown) for opening / closing a tape cassette insertion / removal opening formed on the front side of the outer casing (not shown) is provided on the lower edge of the front side of the slide side plate 84 of the switch guide frame 40. A lid opening / closing arm opening / closing operation cam surface 108 that is rotated is formed. Lid opening / closing arm 107
Is a tension spring supported rotatably on the other support side plate 77.
The engaging pin 107a protruding from the base end side is rotationally urged by the 109 so as to press and engage the cam surface. When the slide guide frame 40 reciprocates, the engaging pin 107a moves to the cam surface.
By moving on the 108, it is rotated to open and close the opening / closing lid for opening / closing the tape cassette insertion / removal opening.

G-5 Reciprocating operation mechanism of slide guide frame (Fig. 1,
(FIGS. 5 to 12) The slide guide frame 40 which is reciprocally driven with respect to the mechanical chassis 36 to move the cassette holder 35 as described above.
Is reciprocated by a drive motor 37 attached to the lower edge of one side of the mechanical chassis 36 as shown in FIG.

As shown in FIG. 5, a space between the drive motor 37 and the slide guide frame 40 is provided on the outer surface side of the worm gear 111 mounted on the output shaft 110 of the drive motor 37 and the rack gear mounting side plate 83 of the slide guide frame 40. An intermediate connection gear 112 is meshed and connected between rack gears 81 of the rack plate 82 to be connected. As shown in FIG. 12, the intermediate connecting gear 112 is formed by coaxially and integrally forming a large-diameter bevel gear 113 and a small-diameter pinion gear 114, and meshes the bevel gear 113 with the worm gear 111. The worm gear 111 and the rack gear 81 are connected by meshing the pinion gear 114 with the rack gear 81.

Incidentally, the rack plate 82 is, as shown in FIG.
The rack gear mounting side plate 83 is mounted on the rack gear mounting side plate via a rack support plate 115 supported on the outer surface thereof.

The rack support plate 115 that supports the rack plate 82,
Engagement guide holes 117, 117 having a longer diameter in the longitudinal direction in a pair of support pins 116, 116 erected on the rack gear mounting side plate 83.
The first spring engaging piece 118 cut and raised from the rack gear mounting side plate 83 and the second spring engaging bent at one side of the upper edge side of the rack supporting plate 115 are supported. A first limiter spring 120 formed of a coil spring stretched between the pieces 119 is urged to move in the direction of arrow C in FIGS. It is connected and supported. The movement biasing position of the rack support plate 115 is formed by cutting and raising from the rack gear mounting side plate 83, and one end of a second limiter spring 121 that moves and biases the rack plate 82 is locked as described later. This rack support plate 1
The rear end of a rectangular cutout opening 123 formed by cutting out the main surface of the 15 is locked and regulated. And the rack plate
82 is a support pin 116,1 on which the rack support plate 115 is supported.
Engagement guide holes 124, 12 having a long diameter in the longitudinal direction
4 is inserted and supported on the rack support plate 115 so as to overlap. Further, the rack plate 82 is formed by punching the third spring locking piece 122 and the rack plate 82 projecting through a rectangular cutout opening 82a formed by cutting the main surface of the rack plate 82. The rack support plate 115 is extended by a second limiter spring 121 stretched between the spring engagement holes 125 provided.
5 and 12, which is the forward movement direction of the slide guide frame 40 in the direction opposite to the movement urging direction, the movement urging direction by the second limiter spring 121. The end on the side is brought into contact with a locking piece 127 bent at one end of the rack support plate 115, thereby being connected to the rack gear mounting side plate 83 via the rack support plate 115.

When the drive motor 37 is driven to rotate the slide guide frame 40 in the forward direction in the direction of arrow E in FIG. 11, the driving force is transmitted to the rack support plate via the rack plate 82.
The light is transmitted to the slide guide frame 40 via a first limiter spring 120 that biases the movement of the roller 82. The drive motor
When the slide 37 is rotationally driven to move the slide guide frame 40 in the backward direction in the direction of arrow F in FIG. 5, the driving force is applied to the first limiter spring 121 for urging the rack plate 82 to move.
Through the slide guide frame 40.

By the way, the start and stop of the drive motor 37 for reciprocating the slide guide frame 40 are controlled by the slide guide frame.
A return operation detecting switch 128 and a tape cassette mounting position detecting switch 129 which are mounted on a side surface of the mechanical chassis 32 with a switch operating piece 126 formed on the rear end side of the mechanical chassis 32 as shown in FIGS. 5 and 11 are operated. This is done by:
The return position detection switch 128 is shown in FIGS. 1, 5, and 6 in which the slide guide frame 40 is located on the front end side of the mechanical chassis 36 in which the cassette holder 35 has been moved to the first position. When the switch operating piece 126 is in such a return position, the switch operating piece 126 is attached at a position where the pressing operation element 128a is pressed, and the tape cassette mounting position detecting switch 129
The mechanical chassis 36 in which the slide guide frame 40 lowers the cassette holder 35 to the tape cassette mounting position.
The switch operating piece 126 is mounted at a position where the pressing operation element 129a is pressed by the switch operating piece 126 when it is in the retracted position as shown in FIGS. 9, 10, and 11, which is located inside. When the switch guide frame 40 is at the return position, the operation of inserting and holding the tape cassette 1 into the cassette holder 35 is performed, and the switch guide frame 40 is moved slightly inward as described later, When the pressing operation of the pressing operation element 128a of the return position detecting switch 128 by the 126 is performed, the drive motor 37 is driven by the slide guide frame 40.
Is started so as to move in the forward direction. The drive of the drive motor 37 moves the slide guide frame 40 in the forward movement direction, lowers the cassette holder 35 to the tape cassette mounting position, and moves the tape cassette 1 inserted and held in the cassette holder 35 as shown in FIG. When the tape operating position is set to the tape cassette mounting position, it is detected by the switch operating piece 126 that the pressing operation element 129a of the tape cassette mounting position detecting switch 129 is pressed to reach the retracted position as shown in FIG. The drive of 35 is stopped. At this time, the slide guide frame 40 is moved in such a manner that the slide guide pins 85, 85 and 88, 88 come into contact with the front ends of the slide guide grooves 86, 86 and 89, 89, respectively, as shown in FIG. 10 and FIG. The movement in the movement direction is restricted. Also,
When the slide guide frame 40 is at the retracted position where the cassette holder 35 has been lowered to the tape cassette mounting position, when an eject button (not shown) provided on the apparatus main body side is operated, the drive motor 37 is driven in reverse rotation to drive the slide guide frame. Operate 40 in the direction of the return position. Then, as shown in FIG. 5, it is detected by the switch operating piece 126 that the pressing operation element 128a of the tape cassette mounting position detecting switch 128 is pressed to reach the retracted position, and the driving of the driving motor 37 is stopped. At this time, the slide guide frame 40 has the slide guide pins 85, 85 and 88, 88 with the slide guide grooves 86, 86 as shown in FIGS. 10 and 11, respectively.
And 89, 89, the rear end of which abuts on the rearward movement direction.

Then, as described above, when the slide guide frame 40 reaches the retraction position where the cassette holder 35 has been lowered to the tape cassette mounting position and is restricted from moving, the drive motor 37 is immediately driven without being stopped. Contains
As shown by the phantom line in FIG. 11, the rack plate 82 is
The first limiter spring 121 is moved while being extended with respect to the slide guide frame 40 while being integrated with 5, thereby preventing an excessive load on the slide guide frame 40. Also,
When the slide guide frame 40 reaches the front end side position of the mechanical chassis 36 that has moved the cassette holder 35 to the first position and the movement is regulated, and the drive motor 37 is immediately driven without being stopped. 5, the rack plate 82 is moved with respect to the slide guide frame 40 while extending the second limiter spring 121, as indicated by the imaginary line in FIG. 5, so that an excessive load on the slide guide frame 40 is prevented.
Further, after the slide guide frame 40 is moved to the retracted position or the front end side position of the mechanical chassis 36 as described above, the drive motor 37 is further driven to move the rack plate 82 relative to the slide guide frame 40. Then, when the drive motor 37 is completely stopped, the rack plate 82 is urged toward the return position by the first or second limiter spring 121 or 122. Due to the movement of the rack plate 82 in the return direction, the intermediate connecting gear 112 is also rotated in the return direction, so that the so-called tightening phenomenon caused by the biting of the cog gear 113 into the worm gear 111 is prevented.

G-6 Tape cassette insertion / holding detection mechanism (FIG. 1, FIG. 2, FIG. 6, FIG. 8, FIG. 13, and FIG. 14) Further, the tape cassette 1 is protected and disposed on the tape recorder side. In order to protect the mechanical parts such as the reel drive shafts 38, 39 and the like, and to perform a reliable mounting operation to the tape cassette mounting position, the closing plate 14 is moved and the reel drive shaft insertion holes 12, 13 are opened. After detecting that the tape cassette 1 is inserted and held in the cassette holder 35, a tape cassette insertion holding mechanism is provided which enables the slide guide frame 40 to move.

As shown in FIG. 2, the tape cassette insertion holding detection mechanism is configured by mounting a tape cassette insertion detection plate 131 at a position on the lower surface side of the connection support plate 80 of the slide guide frame 40 and close to the slide side plate 84 side. Have been. This tape cassette insertion detection plate 131 has a cassette holder 3
A press-operated portion 132 which is pressed on the upper surface of the tape cassette 1 inserted into the cassette 5 is formed. On one side, a slide guide frame 40 moves the cassette holder 35 to the first position. A lock portion formed by cutting the upper surface side of the other support side plate 77 into a concave shape when it is at the position of the front end side of
A lock piece 134 that engages with the projection 133 is provided in a protruding manner.
The pressed operation section 132 is configured by attaching a semi-cylindrical member made of synthetic resin to the lower surface on the tip side of the tape cassette insertion detection plate 131. The tape cassette insertion detection plate 131 is fixed to the end of a leaf spring 137 attached to the lower surface side of the connection support plate 80 with the base end side by a fixing screw 136, so that the pressed operation portion at the tip end side The fixing screw 13 so that 132 projects inward of the cassette holder 35
It is urged to rotate around the support point by 6. Therefore,
The tape cassette insertion detection plate 131 is
When the cassette holder 35 is at the front end side of the mechanical chassis 36 in which the cassette holder 35 has been moved to the first position, the lock piece 134 is pressed and urged into engagement with the lock portion 133 as shown in FIG. Thereby, the movement of the slide guide frame 40 is held in a locked state.

By the way, when the slide guide frame 40 is locked and the cassette holder 35 is in the first position, the rear drive operation section 132 of the tape cassette insertion detecting piece 131 has the reel drive shaft insertion holes 12 and 13 in the cassette holder 35. When the tape cassette 1 is inserted and held in an opened state, the tape cassette 1 is pressed. That is, as shown in FIG. 1, the pressed operation portion 132 is in contact with the protruding pieces 15 and 15 formed on the distal end side of the closing plate 14 of the tape cassette 1 to restrict the movement of the closing plate 14. The inner side of the slide restricting projections 66, 66 and the cassette half 4, which is moved relatively to the closing plate 14 and has the reel drive shaft insertion holes 12, 13, opened, faces the position where the cassette half 4 enters. ing.

The detection of the insertion of the tape cassette 1 by the tape cassette insertion holding detection device is performed as follows. That is, with the slide guide frame 40 at the front end side of the mechanical chassis 36 and the cassette holder 35 being moved to the first position as shown in FIG. The cassette holder is inserted from the front cover 10 side so that the concave grooves 20, 20 are engaged with the protrusions 57, 57 of the bottom plate 60 of the bottom plate 60, and the protrusion at the tip of the closing plate 14 is inserted.
When the members 15 and 15 are inserted up to the positions where they contact the slide restricting projections 66 and 66 of the bottom plate 60, as shown in FIG. Touch Here, when the cassette half 4 is further inserted into the cassette holder 4 with respect to the closing plate 14 so as to open the reel drive shaft insertion holes 12 and 13, the pressed operation portion 132 is moved by the upper surface of the cassette half 4. When pressed, the tape cassette insertion detection piece 131 is rotated upward in the direction of arrow G in FIG. 14 against the urging force of the leaf spring 137, and the engagement of the lock piece 134 from the lock portion 133 is released. . Then, the lock of the slide guide frame 40 is released, and the slide guide frame 40 can be moved forward. The forward movement of the slide guide frame 40 allows the operation of moving the cassette holder 35 to the tape cassette mounting position side. That is, when the tape cassette 1 is inserted and held in the cassette holder 35 with the reel drive shaft insertion holes 12 and 13 opened, the slide guide frame 40 can be moved forward.

G-7 Opening mechanism of the front cover of the tape cassette (FIG. 2, FIG. 6, FIG. 8, FIG. 10, FIG. 1, FIG. 16 and FIG. 17) A front cover opening mechanism for opening the front cover 10 of the tape cassette 1 against the urging force of the torsion coil spring 11 is provided in connection with the mounting operation of the tape cassette 1 at the tape cassette mounting position. The front lid opening mechanism is configured such that after the cassette holder 35 is moved from the first position to the second position by the slide guide frame 40, the slide guide frame 40 further moves forward to move the cassette holder 35 to the tape cassette. The tape cassette 1 includes a pair of lid opening members 141 and 142 for rotating the front lid 10 of the tape cassette 1 inserted and held in the cassette holder 35 in the opening direction when descending to the mounting position side. As shown in FIGS. 2 and 6, these lid opening members 141 and 142 are arranged on the mechanical chassis 36 so as to face the cassette holder 35 that is moved to the tape cassette mounting position.

The one lid opening member 141 is provided with a pressing operation portion 144 protruding from the distal end side to the cassette holder 3 in the second position.
The tape cassette 1 is fixedly attached to the mechanical chassis 36 so as to face the lower edge of one side of the front cover 10 of the tape cassette 1 inserted and held therein. When the cassette holder 35 is moved downward to the tape cassette mounting position, the pressing operation portion 144 is brought into contact with the lower edge of the front cover 10, and the front cover 10 is pressed against the urging force of the torsion coil spring 11. To rotate.

Further, as shown in FIG. 15, the other lid opening member 142 has a pressing operation portion 145 that contacts the lower end edge on the other side of the front cover 10 of the tape cassette 1 at the front end side and rotates the front cover 10. The protruding portion is formed as a substantially L-shaped plate, and its base end is pivotally supported by a pivot shaft 146 planted below the mounting plate 140 planted on the mechanical chassis 36. It is movably mounted. The other lid opening member 142 is rotated by an inner slide guide support pin 75 that supports the cassette holder 35 on the mounting plate 140 when the cassette holder 35 is lowered. It is connected to. That is, the other lid opening member 142 is
The rotation operation plate 1 is connected to the rotation guide pin 148 protruding from one side.
The rotary operation plate 147 is connected to the rotary operation plate 147 by being inserted into and engaged with an elongated hole 149 formed in the main surface of the rotary member 47. When the pin 148 is slid and guided, the pin 148 is rotated about the pivot 146. By the way, the rotation operation plate 147 is rotatably mounted by pivotally supporting one side of a base end side on a pivot shaft 150 which is an outer surface of the other support side plate 77 and is erected on the upper end side. Have been. The rotation operation plate 147 is wound around the pivot shaft 150, and the one arm portion 151a is attached to the mounting side plate 1.
A torsion coil spring 151, which is locked to a spring locking portion 152 bent at the upper end side of the 40 and the other arm portion 151b is locked to a spring pin 153 protruding from the rotation operation plate 147, is provided on one side. The rotationally operated portion 154 is rotationally urged in the direction of arrow H in FIG. 15 so as to be positioned on the movement locus of the slide guide support pin 75. As shown in FIG. 15, the other lid opening member 142 connected to the rotating operation plate 147 biased in this way receives the rotating biasing force of the rotating operation plate 147 and presses the distal end side. The operation section 145 extends toward the lowering side of the cassette holder 31 and is rotationally biased so as to face the lower edge of the front cover 10 of the tape cassette 1. Then, when the cassette holder 35 is moved down from the second position shown in FIG. 8 to the tape cassette mounting position side shown in FIG. The turning operation plate 147 is turned in a direction opposite to the arrow H in FIG. 15 against the turning urging force of the torsion coil spring 151.
When the rotation operation plate 147 is rotated, the other lid opening member 142 faces the rotation direction of the front lid 10 of the tape cassette 1 while the rotation guide pin 148 is slid and guided by the elongated hole 149. 15, the front cover 10 is rotated by the pressing operation part 145 against the urging force of the torsion coil spring 11, and the cassette half 4 is rotated as shown in FIGS. 10 and 17. Open the front side of.

In this embodiment, one lid opening member 141 is fixedly disposed on the mechanical chassis 36, but the other lid opening member 14
As in the case of 2, it may be configured to be rotated by the cassette holder 35.

G-8 Tape Cassette Ejection Mechanism (FIGS. 1, 2, 7, 9, 18, and 19) This tape recorder uses a tape holder 35 in which the tape cassette 1 is inserted and held. A tape cassette ejecting mechanism is provided for ejecting the tape cassette 1 from the cassette holder 35 so as to be operable when ejecting the tape cassette 1 moved from the mounting position to the first position.

As shown in FIG. 1, FIG. 2, and FIG. 18, the tape cassette discharging mechanism has a cassette pressing operation portion 156 at a substantially central portion on the rear side opposite to the tape cassette insertion / removal opening 35a on the front side of the cassette holder 35. Slide guide frame 4
Cassette pressing operation lever 157 supported to move freely to 0
The rotation guide groove 159 is engaged with a rotation guide pin 158 rotatably supported by the mechanical chassis 36 and erected on the cassette pressing operation lever 157, and the rotation is connected to the cassette pressing operation lever 157. A moving operation lever 160 and a tip cam follower 161 are pivotally supported and rotatably supported by the rotation operation lever 160, and are rotated in a direction in which the cam follower 161 is pressed against a cam body 162 provided on the slide guide frame 40. And a cam lever 163 which is urged and urged.

The cassette pressing operation lever 157 constituting the above-mentioned tape cassette discharging mechanism is designed so that the front cover 10 of the tape cassette 1 inserted and held in the cassette holder 35 can be pressed stably over a wide area in FIG. FIG. 2 and FIG.
As shown in the figure, a wide cassette pressing operation portion 156 is bent at the front end side and formed in a substantially T-shape. The cassette pressing operation lever 157 includes a pair of slide guide grooves 164, 164 formed in the longitudinal direction such that the cassette pressing operation portion 156 faces a substantially central portion of the cassette holder 35 in the left-right direction. A pair of slide guide pins 165, 16 erected at substantially the center of the lower surface side of the 40 connection support plates 80
The slide guide frame 40 is mounted so as to advance and retreat in the reciprocating direction of the slide guide frame 40. The cassette pressing operation lever 157 includes a spring locking piece 166 bent at one rear end side of the connection support plate 80 and a spring locking piece formed at the front end side of the cassette pressing operation lever 157. The tension spring 168 locked between the holes 167 is urged to move in the direction of the arrow J in FIGS. 1 and 18 in the direction away from the cassette holder 35. At this time, the cassette pressing operation section 156 is held at a position separated by a predetermined distance from the front side of the tape cassette 1 so as not to press the tape cassette 1 inserted and held in the cassette holder 35.

Also, as shown in FIGS. 1 and 18, the rotation operation lever 160 is implanted on a support piece 169 formed on the upper side of the rear end side of one of the support side plates 76 attached to the mechanical chassis 36. A base end is pivotally mounted on an upright support shaft 170 so as to be rotatable. The rotation operation lever 160 receives the urging force of a tension spring 168 that moves and urges the cassette pressing operation lever 157, and moves in the direction of arrow K in FIG. It is biased to rotate. Accordingly, the rotation operation lever 160 engages the rotation guide groove 159 formed as a long hole on the distal end side with the rotation guide pin 158 implanted on one side of the middle part of the cassette pressing operation lever 157. When the cassette pressing operation lever 157 is moved, the rotation guide pin 158 moves in the rotation guide groove 159 in accordance with the movement of the cassette pressing operation lever 157, thereby rotating about the support shaft 170. Is done.

Further, the cam follower 161 is fitted into an arc-shaped guide groove 171 formed in the middle of the rotation operation lever 160.
Are protrudingly engaged, and the base end side is pivotally supported by a support shaft 172 erected in the middle of the rotation operation lever 160, and is rotatably attached to the lower surface side of the rotation operation lever 160. The cam lever 163 is provided with a tension member extending between a spring engagement piece 173 protruding from one end of the rotation operation lever 160 and a spring engagement piece 174 protruding from one halfway of the cam lever 163. Spring 1
75 makes the cam follower 161 slide guide frame 4
In FIG. 1, it is urged to rotate in a direction indicated by an arrow L in FIG.

The cam body 162 with which the cam follower 161 comes into contact is formed as a molded body of a synthetic resin, and as shown in FIG. 18, a support pin is provided on the lower surface side of the connection support plate 80 of the slide guide frame 40. Mounted via 176. The cam body 161 has a slide guide frame 40
When the user moves forward to move the cassette holder 35 from the first position shown in FIG. 1 to the second position shown in FIG.
63 is rotated against the urging force of the tension spring 175, and after the slide guide frame 40 reaches the position where the cassette holder 35 is moved to the second position, the cassette holder 35 is further taped. A first cam surface 177 is formed to release the contact engagement during the forward movement so as to descend to the cassette mounting position. This first cam surface 1
Reference numeral 77 is formed as an inclined cam surface inclined at a predetermined angle in the reciprocating direction of the slide guide frame 40. The cam body 162 has a cassette holder 35 in a state where the slide guide frame 40 has been moved down to the tape cassette mounting position side.
When the cam follower 161 is moved back to the second position, which is a position raised with respect to the tape cassette mounting position, the cam follower 161 is pressed and engaged, and the cassette holder 35 is further moved from the second position to the first position. 19, the cam lever 163 is turned in the turning biasing direction by the tension spring 175 in the process of returning to the position of FIG. 19, and the turning operation lever 160 is moved through the cam lever 163 by an arrow in FIG. A second cam surface 178 for turning operation is formed on the cassette holder 35 side in the K direction. The second cam surface 178 is formed so as to be orthogonal to the reciprocating direction of the slide guide frame 40. After the cam lever 161 is rotated by a predetermined amount, the slide guide frame 40 moves the cassette holder 35 to the first position. In the process of returning to move to the above cam follower 16
1 is formed to have a length for releasing the engagement.

The tape cassette discharging mechanism configured as described above
When the slide guide frame 40 moves forward to move the cassette holder 35 from the first position to the second position, the first cam surface 177 pushes the cam lever 163 to the tension spring 175.
Is rotated against the biasing force of At this time, the cam lever 163 is rotated by guiding the cam follower 161 to the arc-shaped guide groove 171, so that no rotational urging force is applied to the rotational operation lever 160, and the rotational operation lever 160 is in the inoperative position. , And the cassette pressing operation lever 157 is also held at the inoperative position. Therefore, during the mounting of the tape cassette 1 to the tape cassette mounting position, the tape cassette 1 inserted and held in the cassette holder 35 is not pressed in the discharge direction.

In the course of the slide guide frame 40 moving back to move the cassette holder 35 from the second position toward the first position, the cam follower 161 is moved to the first position as shown in FIGS. Since the second cam surface 178 is in press-contact engagement with the second cam surface 178, the cam lever 163 is rotated in the rotation biasing direction by the extension spring 175 by the movement of the slide guide frame 40 in the backward movement direction. When the cam lever 163 is rotated in this way, the cam follower 161 is in pressure contact with the end of the arc-shaped guide groove 171 on the rotation direction side. Then, the rotation operation lever 160
Is the first around the support shaft 170 integrated with the cam lever 163.
19 and FIG. 19, it is rotated toward the cassette holder 35 in the direction of arrow K. When the rotation operation lever 160 is rotated in this manner, the engaging pin 158 is engaged with the rotation guide groove 159, and the cassette pressing operation lever 157 interconnected with the rotation operation lever 160 is pulled. The operation is advanced toward the inside of the cassette holder 35 in the direction of arrow N in FIG. 19 against the urging force of the spring 168. Then, the cassette pressing operation section 156 at the tip end of the cassette pressing operation lever 157 presses the front cover 10 side of the tape cassette 1 inserted and held in the cassette holder 35, and the tape cassette 1 is moved to the tape cassette of the cassette holder 35. It is made to protrude toward the insertion / removal opening 35a so that it can be removed from the cassette holder 35.

When the tape cassette 1 is operated to protrude from the cassette holder 35, the relative movement between the cassette half 4 and the closing plate 14 is achieved, so that the reel drive shaft insertion holes 12, 13 are closed.

G-9 Mounting Operation of Tape Cassette (FIGS. 1, 5 to 11) A state in which the tape cassette 1 is mounted on the digital audio tape recorder configured as described above will be described.

First, in order to mount the tape cassette 1, as shown in FIGS. 1 and 6, the slide guide frame 40 is moved to the front end side of the mechanical chassis 36 so that the cassette holder 35 can be inserted and removed. Is moved to the first position. In this state, the slide guide frame 40
The lock piece 134 of the tape cassette insertion detection plate 131 attached to the second support side plate 77 is engaged with a lock portion 133 formed on the other support side plate 77, and the slide guide frame 40 is in a locked state where movement is prevented. The cassette holder 35 that is moved by the slide guide frame 40 is also held at the first position.

Here, the tape cassette 1 is inserted into the cassette holder 35 from the front cover 10 side through a tape cassette insertion opening formed in an outer casing (not shown) of the tape recorder. The tape cassette 1 inserted in the cassette holder 35 holds the closing plate 14
The projections 67, 67 engage with the concave grooves 20, 20 formed in the
Of the cassette half 4 is released, and the cassette half 4 is pressed and supported by the cassette pressing support pieces 68, 68 and the bottom plate 60. When the tape cassette 1 is further inserted into the cassette holder 35, the projecting piece on the tip side of the closing plate 14 is moved.
The movement of the sliding members 15 and 15 is regulated by contacting the sliding regulating protrusions 66 and 66.
When the tape cassette 1 is further inserted into the cassette holder 35 in a state where the movement of the closing plate 14 is restricted, the cassette half 4 moves further inward with respect to the closing plate 14, and the insertion formed in the closing plate 14 is performed. Hole 18, 18 and cassette half 4
The reel drive shaft insertion holes 12, 13 on the bottom face correspond, and the reel drive shaft insertion holes 12, 13 are opened. At this time, the engagement projection 72 at the tip of the engagement pressing support piece 71 is
It engages with the engagement recess 32 on the upper surface. The tape cassette 1 is pressed and supported on both sides by a pair of cassette pressing and supporting pieces 68, 68 while being pressed and supported at its center by the engaging and pressing supporting piece 71, and the engaging projection 72 and the engaging recess 32. The insertion and holding position with respect to the cassette holder 35 is regulated and held by the relative engagement of. Further, as described above, when the cassette half 4 is inserted so that the engaging protrusion 72 is engaged with the engaging recess 32, the pressed half 132 of the tape cassette insertion detecting piece 131 is operated by the cassette half 4. Push operation is performed. By the pressing operation of the pressed operation portion 132, the tape cassette insertion detecting piece 131 is pushed up and rotated against the urging force of the leaf spring 137, and the engagement of the lock piece 134 from the lock portion 133 is released. Then, the slide guide frame 40 is unlocked and becomes movable. When the unlocking operation of the slide guide frame 40 is performed, the slide guide frame 40 is slightly moved in the forward movement direction, and is provided on the slide guide frame 40 that has pressed the pressing operator 128a of the return position detection switch 128. The slide operation piece 126 is separated, the pressing state of the pressing operation element 128a is released, and a signal for starting the drive motor 37 is output from the return position detection switch 128. Based on this signal, the drive motor 37 starts driving in the normal rotation direction.

When the drive motor 37 starts rotating in the forward direction, the slide guide frame 40 is moved forward in the direction of arrow B in FIG. 1, and the cassette holder 35 supported by the slide guide frame 40 The reel drive shaft insertion holes 12 and 13 are integrated with the frame 40 from the first position, and the reel drive shafts 38 and 39 correspond to the reel drive shafts 38 and 39 in the second position shown in FIGS.
Is moved to the position. When the drive motor 37 is further driven in the forward direction to move the slide guide frame 40 further in the forward movement direction as shown in FIG. 9, the cassette holder 35 is moved to the slide guide support pin as shown in FIG. 74,7
4 and 75, 75 are the inclined cam grooves 105,
While being guided by 105, 106, and 106, it is lowered to the tape cassette mounting position side. Then, the tape cassette 1 inserted and held in the cassette holder 35 is engaged with the tape reels 5 and 6 on the reel drive shafts 38 and 38, and the mounting position is regulated by the tape cassette positioning pins 180 and 180. Attached to.

When the slide guide frame 40 moves forward to a position where the cassette holder 35 is lowered to the tape cassette mounting position, as shown in FIG.
a is pressed, the driving of the drive motor 37 in the normal rotation direction is stopped, and the tape cassette mounting operation is completed.

When the cassette holder 35 is moved down to the tape cassette mounting position side, a pair of lid opening portions 141 and 142 are opened.
Of the front cover 10 of the tape cassette 1
, The front cover 10 is rotated, the front surface of the cassette half 4 is opened, and the magnetic tape 7 extending to the front surface is exposed to the outside. The drawer operation is enabled.

Further, when the tape cassette 1 is mounted, the tape cassette 1 detects a tape cassette mounting detection switch.
33, 33 are pressed, the mounting of the tape cassette 1 is detected, and the driving of the loading motor 52 is started.

When the opening operation of the front cover 10 is performed as described above and the mounting operation of the tape cassette 1 to the tape cassette mounting position is performed, the moving guide blocks 43 and 44 constituting the loading mechanism are moved to the tape cassette mounting position side. Starts moving to the rotating magnetic head device 42 side, and the magnetic tape 7 is wound around the tape guiding drum of the rotating magnetic head device 42,
A loading operation for pulling out the tape so that it can travel on a predetermined tape traveling path is performed. When the loading operation is completed, the tape recorder is in a state where a predetermined information signal can be recorded and / or reproduced.

G-10 Removal operation of tape cassette (Fig. 1, Fig. 5
(FIGS. To 11 and 19) A state in which the tape cassette 1 mounted at a predetermined tape cassette mounting position as described above is removed from the tape recorder will be described.

To perform the operation of removing the tape cassette 1, first, an eject button provided on the apparatus main body side is operated. When the eject button is operated, the loading mechanism is operated, and the magnetic tape 7 pulled out to a predetermined tape running path is used.
Is drawn into the cassette half 4. Following the operation of pulling in the magnetic tape 7, the drive motor 37 is driven to rotate in the reverse direction. Then, the slide guide frame 40 starts moving in the backward movement direction, and the cassette holder 35, which has been lowered to the tape cassette mounting position side, is raised to the second position side shown in FIG. When raising the cassette holder 35,
The front lid 10 of the tape cassette 1 is rotated in the return position direction by the torsion coil spring 11 to close the front side of the cassette half 4.

When the slide guide frame 40 further moves in the backward movement direction after the cassette holder 35 has been raised to the second position, the cam lever 163 engaging the cam follower 161 with the second cam surface 178 of the cam body 162 is moved. By rotating in the biasing direction of the tension spring 175, the rotation operation lever 160 is rotated toward the cassette holder 35 in the direction of arrow K in FIG. And
By the rotation of the rotation operation lever 160, the cassette pressing operation lever 157 is advanced toward the inside of the cassette holder 35 in the direction of arrow N in FIG. 19 against the urging force of the tension spring 168, and the cassette pressing operation portion Cassette holder 3 by 156
The tape cassette 1 inserted and held in 5 is pressed. When the tape cassette 1 is pressed in this manner,
The cassette half 4 has an engagement recess 32 on the upper surface and an engagement pressing support piece.
The cassette holder 35 is moved to the tape cassette insertion / removal opening 35a side while disengaging the front end of the 71 from the engagement projection 72. Then, relative movement between the cassette half 4 and the closing plate 14 is performed, and the reel driving shaft insertion holes 12 and 13 are closed. Here, when the tape cassette 1 is further pressed by the cassette pressing operation section 156, the tape cassette 1 projects from the tape cassette insertion / removal opening 35a, and at least a part of the tape cassette 1 passes through the tape cassette insertion port formed in the outer housing. , And can be removed from the cassette holder 35.

When the slide guide frame 40 moves back to move the cassette holder 35 to the first position shown in FIGS. 1 and 6, the switch operation piece 126 detects the return position as shown in FIG. When the pressing operation member 128a of the switch 128 is pressed, it is detected that the slide guide frame 40 has reached the return position, the driving of the driving motor 37 in the reverse direction is stopped, and the operation of taking out the tape cassette 1 is completed.

After the cassette pressing operation lever 157 is operated to move the tape cassette 1 from the cassette holder 35 to the extent that the slide guide frame 40 is further moved in the backward direction, the second cam surface of the cam follower 161 is moved. The contact engagement with 178 is released. When the engagement of the cam follower 161 is released, the cassette pressing operation lever 157 is released.
Is returned to the initial position shown in FIG. 1 retracted with respect to the cam holder 35 by receiving the urging force of the tension spring 168.

H. Effects of the Invention As described above, according to the present invention, after the slide guide frame is moved in one of the reciprocating directions by the drive motor and stopped at a predetermined stop position, the slide guide frame is further moved to the slide guide frame. When the driving force of the motor is applied, the first limiter spring is extended, and the rack support plate and the rack plate supported by the rack support plate are moved relative to the slide guide, and the slide guide frame is reciprocated by the drive motor. When the driving force of the drive motor is further applied to the slide guide frame after being moved to one of the directions and stopped at the predetermined stop position, the second limiter spring is extended and the rack plate is moved to the slide guide. Even if the slide guide frame is moved in the reciprocating direction of the slide guide frame, Load is prevented, further, the rack plate is first
Or, when the second limiter spring is extended, a force in the return direction is applied, so that a rotational force in the return direction is also applied to the pinion gear meshing with the rack portion of the rack plate.
Smooth reciprocating operation by the drive motor of the slide guide frame that moves and operates the cassette holder in which the tape cassette is inserted and held is enabled, and the mounting operation of the tape cassette to the tape cassette mounting position is not possible. Control of the stop position of the guide frame and drive control of the drive motor for moving the slide guide frame can be facilitated. In particular, in the case where the worm gear is used for the driving force transmission mechanism, it is possible to reliably prevent the bite phenomenon between the walk gear and the gear meshing with the worm gear, and to always guarantee smooth rotation of the driving force transmission mechanism. it can.

[Brief description of the drawings]

FIG. 1 is a plan view of a digital audio tape recorder to which the present invention is applied.
FIG. 2 is an exploded perspective view showing the tape cassette mounting device of the tape recorder. FIG. 3 is a plan view showing a state where the tape cassette is inserted into a cassette holder constituting the tape recorder, and FIG. 4 is a plan view showing a state where the tape cassette is inserted and held in the cassette holder. FIG. 5 is a left side view in a state where the cassette holder is at the first position, and FIG. 6 is a right side view thereof. FIG. 7 is a plan view showing a state where the cassette holder has been moved to the second position, and FIG. 8 is a right side view thereof. FIG. 9 is a plan view showing a state in which the slide guide frame has been moved to the innermost position, and FIG. 10 is a right side view showing a state in which the cassette holder has been moved to the tape cassette mounting position. Is a left side view thereof. FIG. 12 is an exploded perspective view of a reciprocating operation mechanism of the slide guide frame. 13 and 14 are schematic side views showing a tape cassette insertion / holding detection mechanism, FIG. 13 shows a tape cassette insertion operation state and a locked state of a slide guide frame, and FIG. 7 shows a cassette insertion detection state and an unlocked state of the slide guide frame. FIGS. 15, 16 and 17 show a mechanism for opening the front cover of the tape cassette, FIG. 15 is a perspective view showing a state before operation, and FIG. 16 is a rear view thereof. FIG. 17 is a perspective view showing a closed state of the front cover. FIG. 18 is an exploded perspective view of the tape cassette discharging mechanism from the bottom side, and FIG. 19 is a plan view showing a state where the tape cassette is discharged from the cassette holder. FIGS. 20 to 23 show a tape cassette used in a digital audio tape recorder.
20 is a perspective view from the top side when not in use, FIG. 21 is a perspective view from the bottom side when not in use, and FIG. 22 is a perspective view with the front cover opened. FIG. 23 is a bottom view in a state where the closing plate closes the reel drive shaft insertion hole. 1 Tape cassette 12, 13 Reel drive shaft insertion hole 35 Cassette holder 37 Drive motor 40 Slide guide frame 81 Rack gear 82 Rack plate 83 Rack gear mounting side plate 111 Worm gear 112 Intermediate connecting gear 113 Bevel gear 114 Pinion gear 115 Rack support plate 116 Support pin 120 First limiter spring 121 Second limiter spring 126 Switch operating piece 128 … Return position detection switch 129 …… Tape cassette mounting position detection switch

Claims (1)

(57) [Claims] A cassette holder into which a tape cassette is inserted and held; and a cassette holder supported vertically and reciprocally supported by a main body of the apparatus. A first position at which the cassette can be inserted and removed, and a second position corresponding to a reel driving shaft insertion hole opened at the bottom of the tape cassette and a reel driving shaft arranged at the apparatus main body side correspond to each other. A slide guide frame for operating the cassette holder up and down at the second position; and a first side supported by one side of the slide guide frame so as to be slidable in the reciprocating direction of the slide guide frame.
A rack support plate slidably urged in one of the reciprocating directions of the slide guide frame by the limiter spring, and a slidable guide frame supported by the second limiter spring while being movably supported in the reciprocating direction of the slide guide frame. A rack plate supported by the slide guide frame by being urged to move to the other one of the reciprocating directions and having an end in the biasing direction locked to a rack support plate; and a rack portion of the rack plate. A tape cassette mounting device comprising a drive motor for rotating a meshing pinion gear and reciprocating the slide guide frame.