JPH0210558A - Tape cassette loading device - Google Patents

Abstract

PURPOSE:To smoothly execute the loading operation of a tape cassette by interposing a limiter mechanism to the part of a driving force transmission mechanism to transmit the driving force of a driving motor to a slide guide frame. CONSTITUTION:A slide guide frame 40 is movement-operated in one of a reciprocating movement direction by a driving motor 37, after it is stopped at a prescribed stopping position, when the driving force of the driving motor 37 is applied to the slide guide frame 40, a first limiter spring 120 is extended, a rack supporting plate 115 and a rack plate 82 supported by the rack supporting plate 115 are moved for the slide guide 40. On the contrary, after the slide guide frame 40 is movement-operated in the other one of the reciprocating movement direction and stopped at the prescribed position, and further, when the driving force of the driving motor 37 is applied to the slide guide frame 40, a second limiter spring 121 is extended, and the rack plate 82 is movement- operated for the slide guide frame 40. Thus, the excessive load to the slide guide frame 40 can be prevented, and the tape cassette can be surely loaded on the tape cassette loading position.

Description

[Detailed description of the invention] The invention will be described in the following order.

A. Industrial field of application B8 Summary of the invention C1 Prior art 1 Problems to be solved by the invention 88 Means for solving the problems F0 Effect G. Example G-1 Tape cassette used in a digital audio tape recorder (Figures 20 to 23) Schematic configuration of G-2 digital audio tape recorder (Figures 1 and 2) G-3 Cassette holder (Figures 1 to 6) G-4 Slide guide frame (Figures 1 to 6) 1, 2, and 5) G-5 Slide guide frame reciprocating operation mechanism (Fig. 1, 5 to 12) G-6 Tape cassette insertion/holding detection mechanism (Fig. 1, 2
, Fig. 6, Fig. 8, Fig. 13, and Fig. 14) Front cover opening mechanism of G-7 tape cassette (Fig. 2, Fig. 6)
, Fig. 8, Fig. 15, Fig. 16, and Fig. 17) G-8 tape cassette ejection mechanism (Fig. 1, Fig. 2, Fig. 7)
(Fig. 9, Fig. 18, and Fig. 19) G-9 tape cassette installation operation (first time).

(Figures 5 to 11) G-10 tape cassette removal operation (Figures 1 and 5)
(Figures 11 and 19) H6 Effect A of the Invention, Industrial Field of Application The present invention provides a method for moving the cassette holder into which a tape cassette is inserted and held in the horizontal and vertical directions. The present invention relates to a tape cassette mounting device that is applied to a magnetic recording/reproducing device such as a cassette type tape recorder, in which a tape cassette inserted and held in a tape cassette is mounted at a predetermined tape cassette mounting position.

B1 Summary of the Invention The present invention provides a tape cassette in which the cassette holder inserted and held is moved in the horizontal and vertical directions by reciprocating a slide guide frame that supports the cassette holder in a vertically movable manner using a drive motor. , 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 main body of the device, and a driving force transmission for transmitting the driving force of the drive motor to the slide guide frame. By interposing a limiter mechanism in the mechanism part, when the slide guide frame is reciprocated by the drive motor, excessive load is not applied to the slide guide frame, and smooth tape cassette operation is ensured. It is designed to allow mounting operations.

C0 PRIOR TECHNOLOGY Conventionally, a tape cassette is operated by moving the cassette holder horizontally and vertically by reciprocating a slide guide frame that supports a cassette holder to be inserted and held in a vertically movable manner using a drive motor. 2. Description of the Related Art A tape cassette mounting device has been proposed and used, in which a tape cassette inserted and held in a cassette holder is mounted at a predetermined tape cassette mounting position within an apparatus main body.

This type of tape cassette mounting device is configured such that the driving force of the drive motor is transmitted to the slide guide frame via a driving force transmission mechanism that includes a plurality of gears such as a worm gear and a rack gear. The slide guide frame is reciprocated through the drive force transmission mechanism by driving the drive motor, and the cassette holder supported by the slide guide frame is moved horizontally and vertically. The tape cassette inserted and held in the cassette holder is mounted to a predetermined tape cassette mounting position, or transferred from the tape cassette mounting position to a position where it can be inserted and removed.

B6 Problem to be Solved by the Invention By the way, in the tape cassette mounting device in which the cassette holder is moved by reciprocating the slide guide frame using the drive motor as described above, it is possible to securely mount the tape cassette into the tape cassette. In order to attach the tape cassette to the tape cassette mounting position, it is necessary to reliably move the cassette holder into which the tape cassette is inserted and held to the tape cassette mounting position. In order to reliably move the cassette holder to the above position, the slide guide frame for moving the cassette holder needs to be reliably moved to a predetermined movement position with a predetermined driving force. Therefore, the drive motor is controlled so as to reliably move the slide guide frame until it reaches a predetermined stop position in the reciprocating direction.

However, inertial 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.
When the slide guide frame is forcibly stopped by a mechanical stopping means, the excessive load is handled by a plurality of gears such as a worm gear and a rack gear that transmit the driving force of the drive motor to the slide guide frame. In addition, there is a possibility that a so-called tightening phenomenon occurs due to biting between the gears constituting the driving force transmitting mechanism, and smooth rotation of the driving force transmitting mechanism may be inhibited. In particular, for those that use a worm gear for the driving force transmission mechanism,
A phenomenon of biting between the worm gear and the gear meshing with the worm gear tends to occur, and smooth rotation of the driving force transmission mechanism is hindered.

Therefore, the present invention enables smooth reciprocating operation by a drive motor of the slide guide frame that moves the cassette holder into which the tape cassette is inserted and held, thereby ensuring the reliable mounting operation of the tape cassette at the tape cassette mounting position. The present invention has been proposed for the purpose of providing a tape cassette loading device that facilitates control of the stop position of the slide guide frame and drive control of the drive motor for moving the slide guide frame.

89 Means for Solving the Problems In order to achieve the above-mentioned objects, the present invention provides a cassette holder into which a tape cassette is inserted and held; The cassette holder is movably supported, and this reciprocating operation moves the cassette holder to a first position where the tape cassette can be inserted and removed, and a reel drive shaft insertion hole opened in the bottom of the tape cassette to the apparatus main body side. A slide guide frame for moving the disposed reel drive shaft between corresponding second positions and vertically moving the cassette holder at the second position; A rack support plate that is slidably supported in the reciprocating direction of the slide guide frame and is biased to slide in either direction of the reciprocating force of the slide guide frame by a first limiter spring; The slide guide frame is supported so as to be movable in the direction of movement, and is urged by a second limiter spring to move in the other direction of the reciprocating movement of the slide guide frame, and the end on the side in the direction of the urging force is locked to the rack support plate. The slide guide frame includes a rack plate supported by the slide guide frame, and a drive motor that rotates a pinion gear meshing with the rack portion of the rack plate and reciprocates the slide guide frame.

F9 Effect The present invention provides that, after the slide guide frame is moved in one of the reciprocating directions by the drive motor and stopped at a predetermined stop position, when the driving force of the drive motor is further applied to the slide guide frame, The first limiter spring is expanded, and the rack support plate and the rack plate supported by the rank support plate are moved relative to the slide guide, and the drive motor moves the slide guide frame in the other direction of reciprocation. After being operated and stopped at a predetermined stop position, when the driving force of the drive motor is further applied to the slide guide frame, the second limiter spring is expanded and the rank plate is moved relative to the slide guide frame. Ru.

Further, no matter in which direction the slide guide frame is reciprocally moved, excessive load on the slide guide frame is prevented. Further, when the first or second limiter spring is extended, a force in the return direction is applied to the rack plate, and therefore a rotational force in the return direction is also applied to the pinion gear meshing with the rack portion of the rank plate.

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

G-1 Tape cassette used in digital audio tape recorder (FIGS. 20 to 23) In order to explain a specific embodiment of the digital audio tape recorder to which the present invention is applied, the tape cassette used in the above-mentioned tape recorder is shown below. Explain the cassette.

In order to completely protect the magnetic tape stored in the cassette half, the tape cassette has a structure that can be sealed when not in use, such as during storage when not attached to a tape recorder.

That is, as shown in FIGS. 20[1 to 23], the tape cassette 1 has a pair of tape reels 5 and 6 rotatably placed inside a cassette half 4 formed by butting and joining a pair of upper and lower halves 2. Support these tape reels 5
, 6, and a magnetic tape 7 is wound and stored therein.

The magnetic tape 7 is extended outward from the front side of the cassette half 4 through tape draw-out ports 8 and 9 formed on both sides of the front side of the cassette half 4, and is reeled from one tape reel 5 to the other tape reel. It is wrapped in 6 pieces. Further, on the front side of the cassette half 4, a front cover 1o is rotatable in order to protect the magnetic tape 7 extending on the front side of the cassette half 4 when the tape cassette 1 is not installed in a tape recorder. Can be installed freely.

This front cover 1o has a rotating shaft 10 as shown in FIG.
A torsion coil spring 11, which is a biasing means, wound around the cassette half 4 is biased to rotate in the direction of closing the lid covering the magnetic tape 7 extending on the front side of the cassette half 4.

Furthermore, as shown in FIGS. 21, 22, and 23, holes are provided on the bottom side of the cassette half 4 when the tape cassette l is not installed in the tape recorder. Reel drive shaft insertion hole 12.13
A closing plate 1 having a U-shaped cross section prevents dust from entering the cassette half 4 and protects the magnetic tape 7 by closing the lid.
4 is attached so as to be slidable in the front-back direction. A pair of projecting pieces 15, 15 are provided on the front edge of the blocking plate 14,
As shown in FIG. 22, when the cassette half 4 is biased toward the front side in a direction that closes the reel drive shaft insertion holes 12 and 13 by the torsion spring 16 attached to the cassette half 4 side, as shown in FIG. As shown, it is locked to the front side of the cassette half 4 to restrict the movement position of the closing plate 14. Note that a notch recess 17.17 is formed at the lower edge of the front cover 10 corresponding to the protruding pieces 15, 15, which serves as a relief when the cassette half 4 moves relative to the closing plate 14. .

In addition, a pair of insertion holes 1B are provided on the main surface of the closure plate 14.
, 18 are bored, and when this blocking Fi 14 is relatively moved to the rear of the cassette half 4, the insertion holes 1B and 18 are inserted into the bottom plate of the lower half 3, as shown by the two-dot chain line in FIG. Reel drive shaft insertion holes 12, 13 formed in
, so that the reel drive shaft provided on the tape recorder side can enter into the cassette half 4. Then, the closing plate 14 is moved forward,
The lower surface of the space 19 faces the tape pull-out means of the loading operation mechanism provided on the tape recorder side that pulls out the magnetic tape 7 formed on the front side of the cassette half 4 to the outside of the cassette half 4 and performs the loading operation.
As shown in FIG. 21, when the state is closed, the insertion holes 1B, 18 of the closing plate 14 and the reel drive shaft insertion holes 12, 13 of the lower half 3 are shifted in position from each other, and the reel drive shaft insertion The holes 12.13 are closed by the main surface of the closing plate 14.

Further, the closing plate 14 includes a closing plate 1 formed on the bottom plate of a cassette holder provided in a tape recorder, which will be described later.
A concave groove 20 is formed into which a protrusion serving as a lock releasing means for releasing the lock of the locking means 4 enters. This concave groove 20 is formed by opening the front edge side of the closing plate 14 over a midway portion in the front-rear direction, which is the moving direction of the closing plate 14.

In the concave groove 20, a closing plate 14 is inserted into the space 19 of the cassette half 4 and the reel drive shaft insertion hole 12,1.
The lock piece 2 provided on the cassette half 4 locks the closing plate 14 in the closed position where the space 19 and the reel drive shaft insertion holes 12 and 13 are opened.
An engagement hole 23 and an engagement notch 2 into which the first locking protrusion 22 engages
4 is drilled. The lock piece 21 is attached to the lower half 3
By forming a U-shaped cut groove in the bottom plate, the rear end portion is connected to the bottom plate of the lower half 3, and a hemispherical retaining protrusion 22 is integrally formed on the lower surface of the front end portion.

Then, as shown in FIGS. 21 and 23, the closing plate 1
4 is in the closed state, the locking protrusion 22 at the tip of the lock piece 21 engages with the engagement hole 23 provided in the closing plate 14, and the closing plate 14 is locked so that it does not move toward the open position. has been done.

Furthermore, inside the cassette half 4, the tape reel 5.6, which is rotatably supported within the cassette half 4, rotates inadvertently when it is not attached to the tape recorder, and the magnetic tape 7 wound thereon rotates inadvertently. As shown in FIG. 20, a reel lock lever 26 for preventing the reel from being loosened and damaged is extended in the width direction on the inner surface of the upper half 2.
The elongated holes 2B, 2B are engaged with a pair of slide guide pins 27, 27 set on the inner surface of the upper half 2, so that the upper half 2 is slidably supported in the front and rear directions relative to the tape reels 5, 6. It is attached and urged to move toward the tape reel 56 by a torsion coil spring 29 attached to the inner surface. Then, by pressing the pressing piece 3030 protruding from one side of the reel lock lever 26 onto the outer peripheral surface of the upper end side of the tape reels 5, 6, the tape reels 5, 6 are
is locked so that it cannot be rotated. Also, reel lock lever 2
On both sides of the front cover 6, there are movable operation arms 3 that relatively engage with the rotating piece 10b of the front cover 10 when the front cover IO is opened.
1 is formed on the side surface of the cassette half 4 so as to extend in the front-rear direction. When the front cover 10 is rotated to open the front side of the cassette half 4 as shown in FIG.
0b, the moving operation arm 31 is moved forward of the cassette half 4, and the reel lock lever 26 is moved in a direction away from the tape reels 5, 6 against the biasing force of the torsion coil spring 29. By this movement operation of the reel lock lever 26, the pressure on the tape reels 5.6 by the pressing pieces 30.30 is released, and these tape reels 5.6 are free to rotate and move the magnetic tape 7 outward of the cassette half 4. It is possible to extend the

Furthermore, on the upper surface side of the cassette half 4, the front cover 10
A rectangular engagement recess 32 is formed in the center in the left-right direction at a position closer to the side. This engagement recess 32 is
In a tape cassette loading device that uses a pull-in operation lever to pull the tape cassette 1 from a tape cassette insertable/removable position to a tape cassette mountable position, an engagement claw formed at the tip of the blow-in operation lever engages. It is designed to make it possible to do so.

The tape cassette 1 configured as described above is inserted into the tape recorder main body via a cassette holder that is operated to move horizontally and vertically between a tape cassette insertion/removal position and a tape cassette mounting position, as will be described later. The tape cassette is installed at the above-mentioned tape cassette installation position.

By inserting and holding the tape cassette 1 into the cassette holder, the tape cassette 1 is inserted into the cassette half 4 and the closing plate 14.
The reel drive shaft insertion holes 12 and 13 allow for relative movement operation.
The opening operation is performed, and the front surface 1110 is rotated by rotating the cassette holder to the tape cassette mounting position, thereby opening the front side of the cassette half 4 and exposing the magnetic tape 7 to the outside and pulling it out. Make it possible.

G-2 Schematic configuration of digital audio tape recorder (FIGS. 1 and 2) A digital audio tape recorder equipped with a rotating magnetic head device to which the present invention is applied records the tape cassette 1 configured as described above. As shown in FIG. 1, FIG. 2, FIG. 3, and FIG. The cassette holder 35 is supported in a reciprocating manner by a mechanical chassis 36 that constitutes the tape recorder main body, and is reciprocated by a drive motor 37 as described later to allow the cassette holder 35 to be inserted into and removed from the tape cassette 1. the reel drive shaft insertion holes 12 and 13 opened at the bottom of the tape cassette 1, and the reel drive shaft 3 positioned so as to stand up on the mechanical chassis 36.
8.39 is provided with a tape cassette mounting device comprising a slide guide frame 4o for vertically moving the cassette holder 36 at a corresponding second position.

Also, a reel drive shaft 38 to which the tape cassette 1 is attached
．． As shown in FIG. 1, the magnetic tape 7 pulled out from the tape cassette 1 via the mechanical chassis 36 is placed on the side opposite to the tape cassette mounting position where the tape cassette 39 is disposed.
A rotary magnetic head device 42 around which a magnetic head is wound is disposed. Between the tape cassette loading device and the rotating magnetic head device 42, magnetic tapes 7 from the tape cassette 1 are provided.
A pair of movable guide blocks 43 and 44 constituting a loading operation mechanism for pulling out the tape and winding it around the tape guide drum of the rotary magnetic head device 42 are provided. The magnetic tape 7 is hooked onto these moving guide blocks 43 and 44, and the magnetic tape 7 is placed on the tape guide drum of the rotating magnetic head device 42 at a predetermined angle, for example, about 90 degrees.
A tape guide roller 45 and an inclined guide pin 46 are installed to guide the tape to be wound over an angle range of 0°. The moving guide blocks 43 and 44 are connected to slide guide grooves 47 formed in the mechanical chassis 36.
．． 48, the tape guide roller 45 and the inclined guide pin 46 extend from a position facing the space 19 of the tape cassette 1 mounted at the tape cassette mounting position to a position to the side of the rotating magnetic head device 42. movement operation is performed. The moving operation of the moving guide blocks 43 and 44 is performed by rotationally driving two loading rings 49 and 49 disposed around the outer periphery of the rotary magnetic head device 42. That is, each of the moving guide blocks 43
．． 44 is connected to each loading ring 49, 49 by a connecting arm (not shown), and is moved by rotation of these loading rings 49, 49 by a loading motor 52. Note that each loading ring 49 , 49 is connected to the loading motor 52 through a connecting gear mechanism 53 and a connecting belt 54 to receive driving force.

In addition, the tape cassette device position and the rotating magnetic head device 4
A magnetic tape 7 is inserted between the capstan shaft 55 and the capstan shaft 55.
The pinch roller 56, tape guide support arm 57, and a tension gear arm constituting a tension regulator (not shown) are rotatably arranged. is the moving guide block 43
The loading ring 49 is rotated between the position rotated to the tape cassette loading position side and the position rotated to the rotating magnetic head device 42 side by the rotational drive of the loading ring 49. Guide block 43.
44, the magnetic tape 7 in the tape cassette 1 is wound around the rotary magnetic head device 42, and a loading operation is performed on a predetermined tape running path on which the tape can run.

In addition, as shown in FIG. 2, at the tape cassette mounting position portion where the reel drive shafts 38 and 39 are disposed on the mechanical chassis 36, there are tape cassette mounting detection switches 33 and 33 for detecting the mounting of the tape cassette 1. is installed.

G-3 Cassette Holder (Figs. 1 to 6) The cassette holder 35 constituting the tape cassette mounting device 41 described above is a cassette holder with open front and back sides so that the tape cassette 1 can be inserted and held therein. It is formed into a box shape. That is, the cassette holder 35
As shown in FIGS. 1 and 2, there is a bottom plate 60 on which the tape cassette 1 is placed, side plates 61.62 formed upright on both sides of the bottom plate 60, and side plates 61.62 arranged opposite to the bottom plate 60. Top plate 63 installed across 62
It is formed into a substantially box shape. A reel drive shaft entry notch 64 into which the reel drive shafts 38 and 39, which are spaced apart from each other in the left-right direction, enter is formed in the center of the front edge of the bottom plate 60, and in the center of the rear edge. An inverted trapezoidal notch 65 is formed at both ends of the notch 65, and the protrusions 1 provided on the closing plate 14 of the tape cassette 1 are provided at both ends of the notch 65.
A sliding regulating protrusion 66.66 is formed in an upright manner to abut against the occluding plate 5.15 and restrict the movement of the closing plate 14.

Further, a pair of protrusions 67, 67 for pressing the lock piece 21 that locks the closing plate 14 of the tape cassette 1 is formed in a bulging position on both sides of the bottom plate 60 near the Fi 61, 62 side. There is.

Further, on the top plate 63, there are a pair of cassette pressing support pieces 68 and 68 that elastically press and support the tape cassette l inserted and held in the cassette holder 33, as shown in FIGS.
As shown in the figure, it is provided so as to extend in the insertion direction of the tape cassette 1. These cassette pressing support pieces 68.68 have U-shaped notches 69.6 in the top plate 63.
9 is formed integrally with a portion of the upper surface vi, 63 so as to be elastically displaceable. A tape cassette pressing projection 70.degree. 70 made of synthetic resin is attached to the tip of the cassette pressing support plate 68, 68 so as to project inward of the cassette holder 35. Note that the cassette pressing plate support pieces 68, 68 are used to hold the tape cassette 1 inserted and held in the cassette holder 35.
The tape cassette 1 is attached at symmetrical positions near both sides of the upper surface of the tape cassette 1 so as to press evenly near the positions corresponding to the grooves 20, 20 formed in the closing plate 14 of the tape cassette 1.

Furthermore, the central part of the back side of the upper surface plate 63 engages with an engagement recess 32 formed on the upper surface of the cassette half 4 of the tape cassette 1 inserted into the cassette holder 35 to elastically hold the tape cassette 1. An engaging press support piece 71 is provided to project and support the press. This engagement pressing support piece 7
1 is formed to protrude from the rear side of the upper plate 63 by forming a pair of notches 72 and 72 on the rear end side of the upper plate 63, as shown in FIG. It is considered possible. An engaging protrusion 73 made of synthetic resin that engages with the engaging recess 32 on the upper surface of the cassette half 4 is attached to its tip. Through this engagement protrusion 73, the closing plate 14 was engaged with the sliding regulating protrusion 66.66, and the cassette half 4 was moved relative to the closing plate 14 to open the reel drive shaft insertion hole 12.13. When the tape cassette 1 is inserted and held in the cassette holder 35 in this state, the tape cassette 1 is attached at a position where it engages with the engagement recess 32.

The tape force set 1-1 is inserted into the cassette holder 35 formed as described above from the front lid 10 side as shown in FIG. Then, when the tape cassette 1 is inserted along the bottom plate 60 of the cassette holder 35 in the direction indicated by the arrow in FIG. The cassette is inserted with its position regulated, and is sandwiched between the bottom plate 60 of the cassette holder 35 and the cassette pressing support pieces 68, 68, as shown in FIG. Here, when the tape cassette 1 is further inserted into the cassette holder 35 in the direction of arrow A in FIG. The lock piece 21 that engages with the groove 20° 20 and locks the closing plate 14 to the cassette half 4 is pushed up inward of the cassette half 4 to close the reel drive shaft insertion hole 12, 13 of the closing plate 14. Release the lock at the closed position. Following the unlocking of the closing plate 14, the sliding regulating protrusions 66, 66 on the rear end side of the bottom plate 60 come into contact with the protrusions 15, 15 formed at the tip of the closing plate 14, thereby preventing the closing plate 14 from moving. regulate. When the tape cassette 1 is further inserted into the cassette holder 35 in the direction indicated by the arrow in FIG. will be moved to. This relative movement between the cassette half 4 and the closing plate 14 causes the reel drive shaft insertion hole 12, 13 of the cassette half 4 and the closing plate 14 to
The reel drive shaft insertion holes 12 and 13 correspond to the insertion holes 18 and 18, and the reel drive shaft insertion holes 12 and 13 are opened. In this way, until the reel drive shaft insertion hole 12.13 is opened, the position where the cassette half 4 is inserted is the cassette holder 35 of the tape cassette 1.
into the reel drive shaft insertion hole 12.
, 13 correspond to the reel drive shaft entry notch 64 formed in the bottom plate 60, and the reel drive shaft 38, 39 can be engaged with the tape reel 5.6.

When the reel drive shaft insertion holes 12 and 13 are opened and the tape cassette 1 is inserted and held as described above, the engagement pressing support piece 71 pushes the engagement protrusion 73 at the tip as shown in FIG. The tape cassette 1 is pressed and supported by engaging with the engagement recess 32 on the upper surface of the cassette half 4. Therefore, the tape cassette 1 inserted into the cassette holder 31 is supported on both sides of the cassette half 4 by a pair of cassette pressing support pieces 68.6.
8, and the cassette holder 35 holds the cassette holder 35 with the center portion in the left and right direction pressed and supported by the engagement pressing support piece 71. As a result, the tape cassette 1 is prevented from lifting up near the center, and even if it is deformed, the deformation is corrected and the tape cassette 1 is inserted and held in a stable state so that it is brought into close contact with the bottom plate 60. In particular, this cassette holder 35 has an engagement recess 32 on the upper surface of the cassette half 4 and an engagement protrusion 73 at the tip of the engagement pressing support piece 71.
Since the tape cassette 1 is held by relative engagement with the tape cassette 1, the insertion/holding position of the tape cassette 1 is accurately regulated, and the tape cassette 1 is prevented from being removed for secure retention. It can be performed.

As shown in FIGS. 2, 5, and 6, the cassette holder 35 for inserting and holding the tape cassette 1 as described above has a pair of slides protruding from the upper edge of each side plate 61, 62. Guide support pin 74.74 and 7
The cassette holder slide guide grooves 78, 78 and 79, 79 are inserted into and supported by a pair of cassette holder slide guide grooves 78, 78 and 79, 79, which are formed in a pair of supporting side plates 76, 77, which are respectively installed on both sides of the mechanical chassis 36 so as to stand upright.

By the way, each of the above-mentioned cassette holder slide guide grooves 7
8.78 and 79.79 are horizontal guide grooves 78a, 78a and 79a, 79 bored from the front end side of the support side plate 76.77 toward the middle part on the inner side, as shown in FIG.
a, and these horizontal guide grooves 78a, 78a and 79a.
, 79a, vertical guide grooves 78b, 78b and 79b, 79b are perforated vertically downward from the inner ends of the grooves 79a.
It is formed into an L-shape. Cassette holder slide guide groove 78.7 formed in this way
8 and 79.79 slide guide support pin 74.74
and 75. - The cassette holder 35 supported by inserting the slide guide support pin 74.7
4 and 75.75 are the horizontal guide grooves 78a of the cassette holder slide guide grooves 78 and 79.79.
, 78a, 79a, 79a, a first position where the tape cassette 1 can be inserted and removed by being guided in movement over a range from the front end side of the vertical guide grooves 78b, 78b and 79b, 79b. and a reel drive shaft insertion hole 12,1 opened at the bottom of the tape cassette 1.
3 and the reel drive shaft 34° 35 in the horizontal direction between the corresponding second positions, and the tape reels 5 and 6 are connected to the drive shaft 3.
4. It is operated to move in the vertical direction to engage and disengage from 35.

G-4 slide guide frame (Figures 1, 2, and 5) Cassette holder slide guide fi78 as described above
．． The movement of the cassette holder 35, which is guided by the support plates 78 and 79, 79 in the horizontal and vertical directions, is carried out by the slide guide frame 40, which is supported reciprocably in the horizontal direction via the support side plates 76, 77. This is done by reciprocating operation.

As shown in FIGS. 2 and 5, the slide guide frame 40 for moving the cassette holder 35 is connected to a rack gear 81 to which the driving force from the drive motor 37 is transmitted to one side of the connecting support plate 80. Temporary rack 82 formed on the side
In the rack gear mounting, the side plate 83 is attached so as to hang down, and the slide side plate 84 is bent so as to hang down on the other side, forming a substantially U-shape. For mounting the rack gear, a pair of slide guide grooves 86, 86 are provided on the inner side of the side plate 83 facing the slide side plate 84, in which a pair of slide guide pins 85, 85 installed on one support side plate 76 are respectively engaged. A slide guide block 87 made of synthetic resin and perforated in the longitudinal direction is attached. Further, the slide side plate 84 also has a pair of slide guide pins 88 planted on the other support side plate 77,
A pair of slide guide grooves 89.88 are engaged with each other.
89 are perforated horizontally and horizontally in the longitudinal direction. Then, the slide guide frame 40 engages the slide guide pins 85, 85 with slide guide grooves 86.86 drilled in the slide guide block 87, and slide guides into the slide guide grooves 89.89 drilled in the slide side plate 84. By engaging the pins 88, 88, the pair of supporting side plates 76.
77, the slide guide grooves 86.86 and 89.89 are guided by the slide guide pins 85.85 and 88.88, and reciprocated horizontally with respect to the mechanical chassis 36. .

Further, the slide guide frame 40 has a pair of opening/closing arms 91. which are pivoted at the center by a pivot shaft 90 and can be opened and closed so that the slide guide frame 40 can maintain a horizontal state with respect to the mechanical chassis 36 and reciprocate reciprocatingly in parallel. 92 to the supporting side plates 76, 77, as shown in FIG. The opening/closing arm 91 on the negative side is attached by bending one end to the upper surface of the front end side of the other supporting side plate 77 as shown in FIG. To attach the rack gear of the slide guide frame 40, the opening/closing guide shaft 95, which is movably supported and suspended from the other end, is attached to the bent piece 96 formed by bending the upper edge of the side plate 83. As shown in FIG.
0 and the other support side plate 77, and the other opening/closing arm 92 has one end bent to the upper edge of the slide side plate 84 of the slide guide frame 40. One supporting side plate 7 has an opening/closing guide shaft 100 rotatably supported on a support shaft 99 and suspended from the other end.
A bent piece 101 formed by bending on the upper edge of the front end side of G is engaged with a long hole 102 whose long diameter is perpendicular to the direction of movement of the slide guide frame 40 to support the slide guide frame 40 and one side. The side plates 76 are connected.

As described above, each one end side is supported on the fixed support shaft 94.99,
Opening/closing guide I [1I95, 100 on the other end side]
A pair of opening/closing arms 91 engaged with and attached to 102
．． 92 has one end pivoted on the fixed support shaft 94.99 as a fixed support, and the opening/closing guide shaft 95,1 is inserted into the elongated hole 97102.
The opening/closing operation is performed centering on the pivot 90 while sliding and guiding 00.

In this way, the support side Fi, 76.
77, the slide guide frame 40 is reciprocated parallel to the mechanical chassis 32 with the fixed support shaft 94, 99 as a sliding reference.

The slide guide frame 40, which is supported in a reciprocating manner with respect to the mechanical chassis 32 in this manner, has a holder 31 which is moved horizontally and vertically following the reciprocating movement of the slide guide frame 40. is supported. That is, the cassette holder 31 has a first cassette holder 31 that allows the tape cassette 1 shown in FIGS. 1, 5, and 6 to be inserted and removed.
The reel drive shaft insertion holes 12 and 13 opened at the bottom of the tape cassette 1 from the position , and the reel drive shaft 38.3.
8 and 9 in the horizontal direction between the second positions shown in FIGS. 7 and 8 to which 9 corresponds.

Tape reel 5.6 as shown in Figures 10 and 11
It is supported by the slide guide frame 40 so that it can be moved in a vertical range to engage and disengage from the reel drive shaft 38, 39.

Therefore, as shown in FIGS. 2, 5, and 6, the slide guide block 87 and slide side plate 84 of the slide guide frame 40 are each provided with a pair of inclined cam grooves 105.
．． 105 and 1,06,106 are formed. The cassette holder 35 has slide guide grooves 72, 72, . and 73.73
Slide guide support pins 68, 68 and 7 inserted into
The tip of 3°73 is inserted into the inclined cam grooves 105, 105 and 1.
06 and 106, it is supported by the slide guide frame 40 so that it can be moved in the horizontal and vertical directions as described above.

By the way, in the slide guide frame 40, the pair of opening/closing arms 91.92 are operated to open as shown in FIGS. 7 and 9, and the slide guide pins 85, 85 and 88. 1st in the range of 89.89
1 and 6, the cassette holder 31 is in the advanced position relative to the mechanical chassis 36, and the tape cassette 1 can be inserted and removed while the cassette holder 31 is moved forward in the direction of the arrow B in FIGS. 1 and 6. From the first position shown, the slide guide support pins 74, 74 and 75, 75 are guided to the cassette holder slide guide grooves 78, 78 and 79° 79, and are opened at the bottom of the tape cassette 1 inside the mechanical chassis 36. The reel drive shaft insertion hole 12.13 and the reel drive shaft 34.35 are moved to the corresponding second position shown in FIGS. The reel drive shaft 34. 35 so as to lower it into engagement.

That is, the pair of opening/closing arms 91.92 are closed and moved forward relative to the mechanical chassis 36 with the slide guide pins 85.85, 88, 88 positioned at the inner ends of the slide guide grooves 86.86 and 89.89. When the slide guide frame 40 is in the moved position, as shown in FIGS. 5 and 6, the cassette holder 35 has slide guide support pins 74.47 and 75.75 aligned with the cassette holder slide guide grooves 78.78. and 79.79 in a first position located on the front end side.

Therefore, the above-mentioned inclined cam grooves 105, 105 and 106 1
06, when the slide guide frame 40 and the cassette holder 35 are located in the first position shown in FIGS. 1 and 6, the slide guide support pins 74.74 and 75.75 engage with the upper edge, The cassette holder 35 is
While being moved from this position to the second position as shown in FIGS. 7 and 8, the engagement state is maintained so that the slide guide frame 40 can be moved integrally with the slide guide frame 40. That is, the inclined cam grooves 105, 105 and 10
6.106, the cassette holder 35 is
As shown in the figure, after reaching the second position, the slide guide frame 40 further moves in the forward direction of arrow B in FIGS. 7 and 8, and the slide guide support pins 74, 74, 75.
75 into the slide guide grooves 72.72 and 73.73.
The height range of the vertical guide grooves 72b, 72b and 73b, 73b is set so that the cassette holder 35 can be lowered to the tape cassette mounting position by being guided by the vertical guide grooves 72b, 72b and 73b, 73b. As shown in FIGS. 5 and 6, the slide guide block 87 and the slide side plate 84 are bored at a predetermined inclination angle from the upper edge to the lower edge.

The inclination angles of these inclined cam grooves 105, 105 and 106, 106 are the same as those of the vertical guide grooves 72b, 72b and 73.
The inclination angle corresponds to the hypotenuse of an isosceles triangle whose sides are the heights of the vertical guide grooves 72b and 73b, and the cassette holder 35 It is formed so that it can be lowered to the tape cassette mounting position side.

Note that the lower lj on the front end side of the slide side plate 84 of the switch guide frame 40! Although not shown, a cam surface 108 for opening and closing the lid opening/closing arm that rotates the lid opening/closing arm 107 that opens and closes the opening/closing lid that opens and closes the tape cassette insertion/ejection opening formed on the front side of the outer casing is formed on the lJ edge. has been done. The lid opening/closing arm 107 is rotatably supported by the other supporting side plate 77 and rotated by a tension spring 109 so that a retaining pin 107a protruding toward the proximal end is pressed into engagement with the cam surface 108. Forced. And this lid opening/closing arm 1
07, as the slide guide frame 40 reciprocates, the engagement pin 107a moves above the cam surface and is rotated, opening and closing the opening/closing lid that opens and closes the tape cassette insertion/ejection opening.

(Hereinafter, blank spaces) Structure a for reciprocating operation of the G-5 slide guide frame (Figs. 1, 5 to 12) As described above, the above-mentioned mechanism for moving the cassette holder 35 by being reciprocated with respect to the mechanical chassis 36 The slide guide frame 40 is reciprocated by a drive motor 37 attached to the lower edge of the mechanical chassis 36 as shown in FIG.

Between this drive motor 37 and the slide guide frame 40, the fifth
As shown in the figure, a worm gear 111 attached to the output shaft 110 of the drive motor 37 and the slide guide frame 40
The rack gears 81 of the rack plate 82 disposed on the outer side of the side plate 83 are connected by meshing with the intermediate connecting gear 112. As shown in FIG. 12, this intermediate connecting gear 112 is formed by integrally coaxially forming a large-diameter constant-tooth gear 113 and a small-diameter pinion gear 114, and meshes the constant-tooth gear 113 with the worm gear 111. The pinion gear 114 is meshed with the rack gear 81 to connect the worm gear 111 and the rack gear 81.

By the way, as shown in FIG. 12, the rack plate 82 is attached to the side plate through a rack support film 15 supported on the outer surface of the side plate 83.

The rack gear is attached to the rank support plate 115 that supports the rack plate 82 by inserting a pair of support pins 116 , 116 erected in the side plate 83 through engagement guide holes 117 , 117 whose major diameter is in the longitudinal direction. The rack gear is mounted between a first spring locking piece 118 cut and formed from the side plate 83 and a second spring locking piece 119 bent on one side of the upper edge of the rack support plate 115. 5 and 1 which are the backward movement directions of the slide guide frame 40 by the first limiter spring 120 made of a coil spring tensioned in the
The rack gear mounting is connected and supported by the side plate 83 while being urged to move in the direction of arrow C in FIG. The movement biasing position of the rack support plate 115 is such that one end of a second limiter spring 121, which is cut and raised from the side plate 83 to which the rack gear is attached and biases the rack plate 82 to move, is locked. This rack support plate 11 is attached to the third spring locking piece 122.
A rectangular cutout opening 123 formed in the main surface of 5
It is regulated by locking the rear edge.

The rack plate 82 is stacked on the rack support plate 115 by inserting engagement guide holes 124, 124 whose major diameters are in the longitudinal direction into the distal ends of the support pins 116/5116 on which the rack support plate 115 is supported. It is supported by. Furthermore, the rack plate 82 is
A rectangular cutout opening 82 formed in the main surface of the
The rack support plate 115 is held in tension by the second limiter spring 121 stretched between the third spring locking piece 122 protruding through the spring locking hole 125 formed in the rack plate 82. The slide guide frame 40 is urged to move in the direction indicated by the arrow in FIGS. The rack type mounting is connected to the side plate 83 via the rack support plate 115 by bringing the end of the rack support plate 115 into contact with a locking piece 127 bent at one end of the rack support plate 115.

Then, the drive motor 37 moves the slide guide frame 40 to the first position.
When the first limiter spring 120 is rotated so as to move in the forward direction of the arrow E in FIG.
It is transmitted to the slide guide frame 40 via. Further, when the drive motor 37 rotates the slide guide frame 40 so as to move it in the backward direction of the arrow F in FIG. 121 and the slide guide frame 4
0.

By the way, starting and stopping of the drive motor 37 for reciprocating the slide guide frame 40 is carried out by using a switch operating piece 126 formed on the rear end side of the slide guide frame 40 on one side of the mechanical chassis 32 as shown in FIGS. This is performed by operating a return position detection switch 128 and a tape cassette installation position detection switch 129, which are installed as shown in FIG. Note that the return position detection switch 128
When the slide guide frame 40 is in the return position as shown in FIGS. 1, 5, and 6, which is located on the front end side of the mechanical chassis 36 that has moved the cassette holder 35 to the first position, Push operation element 1 with switch operation piece 126
28.a is pressed, and the tape cassette mounting position detection switch 129 is located on the inner side of the mechanical chassis 36 where the slide guide frame 40 lowers the cassette holder 35 to the tape cassette mounting position. When the switch is in the retracted position as shown in FIGS. 9, 7, 10 and 11, the push operation element 129a is pressed by the switch operation piece 126. Then, when the switch guide frame 40 is in the return position, the insertion and holding operation of the tape cassette l into the holder 35 is performed, and as will be described later, the switch guide frame 40 is moved slightly inward, and the switch Press operation element 128a of return position detection switch 128 by operation piece 126
When the pressure is released, the drive motor 37 starts normal rotation driving to move the slide guide frame 40 in the forward direction. The drive motor 37 moves the slide guide frame 40 in the forward direction, lowers the cassette holder 35 to the tape cassette mounting position, and the tape cassette 1 is inserted and held in the cassette holder 35.
When the tape cassette is installed in the tape cassette installation position as shown in FIG.
Tape cassette mounting position detection switch 1 as shown in the figure.
It is detected that the pressing operator 129a of No. 29 has been pressed and reached the retracted position, and the driving of the drive motor 35 is stopped. At this time, the slide guide frame 40 is such that the slide guide bins 85.85 and 88.88 are
As shown in Figure 1, slide guide grooves 86, 86, respectively.
and 89.89 and comes into contact with the front end portion of 89 to restrict movement in the forward direction. Further, when the slide guide frame 40 is in the retracted position where the cassette holder 35 is lowered to the tape cassette mounting position, when an eject button (not shown) provided on the main body of the apparatus is operated, the drive motor 37 is driven in reverse to guide the slide guide. The frame 40 is operated back in the direction of the return position.

Then, as shown in FIG. 5, it is detected by the switch operation piece 126 that the push operation element 128a of the tape cassette mounting position detection switch 128 has been pressed and reached the retracted position, and the driving of the drive motor 37 is stopped.

At this time, the slide guide frame 40 has slide guide bins 85.85 and 88.88 in the slide guide grooves 86.86 and 88.88, respectively, as shown in FIGS. 10 and 11.
989, and movement in the backward direction is restricted.

Then, as described above, after the slide guide frame 40 reaches the retracted position where the cassette holder 35 is lowered to the tape cassette mounting position and its movement is restricted, the drive motor 37 is immediately driven without being stopped. 11, the rack plate 82 is integrated with the rack support plate 115 to support the first limiter spring 12.
1 is moved relative to the slide guide frame 40 while being extended, and an excessive load on the slide guide frame 40 is prevented. Furthermore, after the slide guide frame 40 reaches the front end position of the mechanical chassis 3G that moved the cassette holder 35 to the first position and its movement is restricted, the drive motor 37 is immediately driven without being stopped. In this case, the rack plate 82 is moved relative to the slide guide frame 40 while stretching the second limiter spring 121, as shown by the imaginary line in FIG. 5, to prevent excessive load on the slide guide frame 40. be done. Further, after the slide guide frame 40 is moved to the retracted position or the front end position of the mechanical chassis 36 as described above, the drive motor 37 is further driven, and the rack plate 82 is moved relative to the slide guide frame 40. When the drive motor 37 is completely stopped, the rank plate 82 is urged toward the return position by the first or second limiter spring 121 or 122. As the rack Fi82 moves in the return direction, the intermediate connecting gear 112 is also rotated in the return direction, thereby preventing the occurrence of a so-called tightening phenomenon due to the equitoothed gear 113 biting into the worm gear 111.

G-6 Tape cassette insertion/holding detection mechanism (Figures 1 and 2)
Figures 6 and 8.

(Figures 13 and 14) In addition, the tape cassette 1 is protected, and mechanical parts such as the reel drive shaft 38° 39 installed on the tape recorder side are protected, and the tape cassette is securely placed in the mounting position. To perform the mounting operation, the tape cassette 1 is opened with the closing plate 14 moved and the reel drive shaft insertion holes 12 and 33 opened.
A tape cassette insertion and holding mechanism is provided that allows the slide guide frame 40 to move after it is detected that the tape cassette is inserted and held in the cassette holder 35.

As shown in FIG. 2, this tape cassette insertion/holding detection mechanism is constructed by attaching a tape cassette insertion detection plate 131 to a position on the lower surface side of the connecting support Fi 80 of the slide guide frame 40 and closer to the slide side plate 84 side. ing. This tape cassette 7) insertion detection plate 131 forms a pressed operation part 132 on the top side of the tape cassette 1 inserted into the cassette holder 35 on the tip side, and a slide guide frame 40 is placed on the side of the cassette. Holder 35 first
When the mechanical chassis 36 is in the front end position of the mechanical chassis 36 which has been moved to the position shown in FIG.
It is constructed by protruding 4. The pressed operation section 132
is constructed by attaching a semi-cylindrical member made of synthetic resin to the lower surface of the tip side of the tape cassette insertion detection plate 131. Then, the tape cassette insertion detection plate 131
By fixing the proximal end to the end of the temporary spring 137 attached to the lower surface side of the connection support plate 80 with a fixing screw 136, the pressed operation part 132 on the distal end side is moved inside the cassette holder 35. The fixing screw 136 is inserted so that it protrudes.
It is urged to rotate around the support point. Therefore, the tape cassette insertion detection plate 131
0 is at the front end position of the mechanical chassis 36 where the cassette holder 35 has been moved to the first position, the lock piece 134 is pressed and biased as shown in FIG.
33, the slide guide frame 40
movement is kept locked.

By the way, when the slide guide frame 40 is locked and the cassette holder 35 is in the first position, the pressed operation part 132 of the tape force detection piece 131 is inserted into the reel drive shaft insertion hole 12 in the cassette holder 35. .13
The tape cassette (1) is opened and placed in a position where it can be pressed by the inserted and held tape cassette (1). That is, the pressed operation part 132 is a protrusion 1 formed on the distal end side of the closing plate 14 of the tape force setting 1 as shown in FIG.
5, 15 to restrict the movement of the closing plate I4, the reel drive shaft is inserted into the reel drive shaft by being moved relative to the closing plate 14 and inwardly of the sliding regulating protrusion 66, 66 of the cassette holder 35 which restricts the movement of the closing plate I4. The cassette half 4 with the hole 1213 opened faces the position where it enters.

The insertion detection of the tape cassette 1 by the tape cassette insertion/holding detection device is performed as follows. That is, the slide guide frame 40 is connected to the mechanical chassis 36.
The front end of the cassette holder 35 is in the position shown in the example.
As shown in the figure, when the tape cassette 1 is moved to the first position, the grooves 20° 20 are engaged with the protrusions 57' and 57 of the bottom plate 60 of the cassette holder 35. Insert it from the front lid 10 side so that the protruding piece 15.15 at the tip of the closing plate
When the cassette half 4 is inserted to a position where it abuts against the slide regulating protrusions 66 and 66, the pressed operation portion 132 abuts against the front end side of the upper surface of the cassette half 4, as shown in FIG. Here, the closing plate 1 is moved so as to open the reel drive shaft insertion hole 12°13.
For 4, add cassette half 4 to cassette holder 4.
When the tape cassette insertion detection piece 131 is inserted into the inside of the cassette half 4, the pressed operation part 132 is pressed by the upper surface of the cassette half 4, and the tape cassette insertion detection piece 131 moves upward in the direction of arrow G in FIG. The lock piece 1 is rotated to
34 is released from the lock portion 133. Then, the slide guide frame 40 is unlocked and becomes ready for forward movement, and the forward movement of the slide guide frame 40 allows the cassette holder 35 to be moved toward the tape cassette mounting position. 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 open, the slide guide frame 40 is allowed to move forward.

Front cover opening mechanism of G-7 tape cassette (Figures 2 and 6)
(Fig. 8, Fig. 10, Fig. 1, Fig. 16, and Fig. 17)) and a tape cassette 1 on the tape recorder main body side.
A front cover opening mechanism is provided which opens the front cover 10 of the tape cassette 1 against the biasing force of a torsion coil spring 11 in connection with the mounting operation of the tape cassette 1 at the tape cassette mounting position. This front lid opening mechanism is the cassette holder 35
is moved from the first position to the second position by the slide guide frame 40, and when the slide guide frame 40 further moves forward to lower the cassette holder 35 to the tape cassette mounting position, the Front cover 10 of tape cassette 1 inserted and held in power center holder 35
A pair of lid openings for rotating the lid in the lid opening direction are composed of members 141 and 142. These lid openings are member 14
1 and 142, as shown in FIGS. 2 and 6, are arranged on the mechanical chassis 36 side so as to face the cassette holder 35 which is moved to the tape cassette mounting position side.

The one lid-opening member 141 has a pressing operation part 144 protruding from the front end of the front lid 10 of the tape cassette 1 held by inserting it into the cassette holder 35 in the second position.
It is fixedly attached to the mechanical chassis 36 so as to face the lower end edge of one side. When the cassette holder 35 is lowered toward the tape cassette mounting position, the pressing operation portion 144 is brought into contact with the lower edge of the front cover lO, and the front surface M10 is pushed against the biasing force of the dust coil spring 11. to operate the rotation.

As shown in FIG. 15, the other lid opening member 142 is a pressing operation portion that contacts the lower edge on the other side of the front cover 10 of the tape cassette 1 and rotates the front cover 10, as shown in FIG. 145 is protruded to form an abbreviated plate-like body, and the proximal end is mounted on the mechanical chassis 36 by pivoting on a pivot shaft 146 planted at a lower position of the plate 140. It is rotatably mounted. This other lid is opened by member 142.
The cassette holder 35 is connected to a rotation operation plate 147 that is rotated by an inner slide guide support pin 75 that supports the mounting plate 140 when the cassette holder 35 is lowered. . That is, to open the other lid, the member 142 performs the rotation operation by inserting and engaging a rotation guide pin 148 protruding from the − side into a long hole 149 bored in the main surface of the rotation operation plate 147. It is connected to a plate 147, and when the rotation operation plate 147 is rotated, the rotation guide pin 148 is slid and guided into the elongated hole 149, thereby being rotated about the pivot shaft 146. . By the way, the rotation operation plate 147 is rotatably mounted with one side of the base end being pivoted on a pivot shaft 150 that is installed on the outer surface of the other support side plate 77 and on the upper edge side. It is being The rotation operation plate 147 is
One arm portion 151a wrapped around the pivot shaft 150 is engaged with a spring locking portion 152 bent at the upper edge of the side plate 140, and the other arm portion 151b is attached to the rotation operation plate 147. A torsion coil spring 151 engaged with a protruding spring pin 153 rotates in the direction of arrow H in FIG. It is dynamically energized. The rotation operation plate 147 that is rotationally biased in this way
As shown in FIG. 15, the other lid opening member 142 connected to the cassette holder 31 receives the rotational biasing force of the rotational operation plate 147 so that the pressing operation portion 145 on the tip side moves toward the lowering direction of the cassette holder 31. The front cover 10 of the tape cassette 1 extends toward the front cover 10 of the tape cassette 1.
It is biased to rotate so that it faces the lower edge of the. Then, the cassette holder 35 moves from the second position shown in FIG.
When the downward operation is performed toward the tape cassette mounting position shown in the figure, the rotated operation section 1 is moved by the slide guide support pin 75.
54 is pressed, and the rotation operation plate 147 is rotated in the opposite direction of arrow H in FIG. 15 against the rotation biasing force of the tear coil spring 151. When this rotation operation plate 147 is rotated, the other lid is opened using the rotation guide pin 14.
8 is slid and guided by the elongated hole 149 and is rotated in the direction of the arrow {circle around (2)} in FIG. 11 to open the front side of the cassette half 4 as shown in FIGS. 10 and 17.

In this embodiment, one lid opening member 141 is fixedly arranged on the mechanical chassis 36, but the other lid opening member 141 is configured to be rotated by the cassette holder 35 like the member 142. There may be.

G-8 tape cassette ejection mechanism (Fig. 1, Fig. 2, Fig. 7, Fig. 9.

(FIGS. 18 and 19) In this tape recorder, when the tape cassette 1 is ejected, the cassette holder 35 into which the tape cassette 1 is inserted and held is moved from the tape cassette mounting position side to the first position side. A tape cassette ejecting mechanism is provided that protrudes the tape cassette 1 so that it can be removed from the cassette holder 35.

As shown in FIGS. 1, 2, and 18, this tape cassette ejecting mechanism includes a cassette pressing operation section 156 located approximately at the center of the back side of the cassette holder 35 that faces the tape cassette insertion/ejection opening 35a on the front side. The cassette pressing operation lever 157 is supported by the slide guide frame 40 so as to be freely movable and retractable, and the rotation guide pin 158 is rotatably supported by the mechanical chassis 36 and is mounted on the cassette pressing operation lever 157. A rotary operation lever 160 is connected to the cassette pressing operation lever 157 by engaging the movable guide groove 159, and a cam follower 161 is pivotally supported at the tip of the cam rotatably supported by the rotation operation lever 160. The cam lever 163 is rotatably biased in a direction to bring the follower 161 into pressure contact with a cam body 162 provided on the slide guide frame 40.

The cassette pressing operation lever 157 constituting the tape cassette ejection mechanism is configured to stably press the front cover 10 portion of the tape cassette 1 inserted and held in the cassette holder 35 over a wide area. As shown in FIGS. 2 and 18, a wide cassette pressing operation portion 156 is bent toward the front end to form a substantially T-shape. The cassette pressing operation lever 157 slides through a pair of slide guide grooves 164, 164 bored in the longitudinal direction so that the cassette pressing operation part 15G faces the substantially central portion of the cassette holder 35 in the left-right direction. Guide frame 4
It is engaged with a pair of slide guide pins 165 and 165 set up in the center of the lower surface of the connecting support plate 80 of No.

The cassette pressing operation lever 157 includes a spring locking piece 166 bent on the rear end side of the connection support plate 80 and a spring locking piece 166 formed on the front end side of the cassette pressing operation lever 157. It is biased to move away from the cassette holder 35 in the direction of arrow J in FIGS. 1 and 18 by a tension spring 168 that is engaged between the holes 167. At this time, the cassette pressing operation unit 156 is held at a position spaced 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.

Further, as shown in FIGS. 1 and 18, the rotation operation lever 160 includes a support piece 1 bent at the upper side of the rear end side of one of the support side plates 76 attached to the mechanical chassis 36.
The proximal end portion is pivotally supported on a support shaft 170 erected at 69 so as to be rotatable. And this rotation operation lever 1
60 receives the urging force of a tension spring 168 that urges the cassette pressing operation lever 157 to move, and the support shaft 170
The cassette holder 35 side is biased to rotate in the direction of the arrow in FIG. 1 about the center. Therefore, the rotation operation lever 160 connects the rotation guide groove 159, which is formed as a long hole at the tip end, to the middle part of the cassette pressing operation lever 157.
It is connected to the cassette pressing operation lever 157 by engaging with the rotation guide bin 158 planted on the side, and as the cassette pressing operation lever 157 moves, the rotation guide bin 158 moves into the rotation guide groove 159. By moving the support shaft 170, the support shaft 170 is rotated.

Further, the cam lever 163 has a cam follower 161 protrudingly engaged with an arcuate guide groove 171 bored in the middle part of the rotary operating lever 160, and its base end is planted in the middle part of the rotating operating lever 160. It is pivotally supported on a support shaft 172 and rotatably attached to the lower surface side of the rotation operation lever 160. This cam lever 163 has a tension tensioning mechanism that is stretched between a spring locking piece 173 protruding from the tip side of the rotary operating lever 160 and a spring locking piece 174 protruding from the midway side of the cam lever 163. A spring 175 urges the cam follower 161 to rotate in the direction indicated by the arrow in FIG.

By the way, the cam body 162 with which the cam follower 161 abuts and engages is formed as a molded body of synthetic resin, and as shown in FIG. 176. The cam body 161 includes the cam follower when the slide guide frame 40 moves forward to move the cassette holder 35 from the first position shown in FIG. 1 to the second position shown in FIG. 161 is pressed and only the cam lever 163 is rotated against the biasing 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. Furthermore, the cassette holder 35
A first cam surface 177 is formed that releases the abutting engagement in the process of forward movement to lower the tape cassette to the tape cassette mounting position. This first cam surface 177 is inclined at a predetermined angle of about 1 in the reciprocating direction of the slide guide frame 40.
A slanted cam surface is formed. In addition, the cam body 16
2 shows the cassette holder 35 in which the slide guide frame 40 has been lowered toward the tape cassette mounting position.
The cam follower 161 is pressed into engagement when the cam follower 161 is moved upwardly to the second position which is higher than the tape cassette mounting position, and the cassette holder 35 is moved from the second position to the first position. In the process of backward movement toward the position shown in FIG. A second cam surface 178 is formed to rotate the cassette holder 35 toward the cassette holder 35 side. This second
The cam surface 178 is formed to be orthogonal to the reciprocating direction of the slide guide frame 40, and 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. The cam follower 161 is formed in such a length that it releases the cam follower 161 in the process of backward movement.

In the tape cassette ejecting 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 engages with the cam lever. 163 is rotated against the biasing force of the tension spring 175. At this time,
Since the cam lever 163 is rotated by guiding the cam follower 161 to the arcuate guide groove 171, no rotation biasing force is applied to the rotation operation lever 160, and the rotation operation lever 160 is held in an inoperative position. , the cassette pressing operation lever 157 is also held in the inoperative position. Therefore, during the installation of the tape cassette 1 into the tape cassette installation position, the tape cassette 1 inserted and held in the cassette holder 35 is not pressed in the ejection direction.

In addition, in the process of the slide guide frame 40 returning to move the cassette holder 35 from the second position toward the first position, as shown in FIGS. 7 and 19, the cam follower 16H1 ( 2, the cam lever 163 is pressed against the cam surface 178 of the tension spring 175 due to the movement of the slide guide frame 40 in the backward movement direction.
is rotated in the direction of rotation bias. 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. The rotation operating lever 160 is rotated integrally with the cam lever 163 about the support shaft 170 toward the cassette holder 35 in the direction of the arrow in FIGS. 1 and 19.

When the rotation operation lever 160 is rotated in this way,
The cassette pressing operation lever 157, which is connected to the rotation operation lever 160 by engaging the engagement pin 158 with the rotation guide groove 159, moves in the direction of arrow N in FIG. 19 against the biasing force of the tension spring 168. The cassette holder 35 is advanced to the side. Then, the cassette pressing operation lever 15
7. The cassette pressing operation unit 156 on the tip side presses the front cover 1'0 side of the tape cassette 1 inserted and held in the cassette holder 35, and the tape cassette l is moved to the tape cassette insertion/ejection opening 35a side of the cassette holder 35. The cassette holder 35 is made to protrude so that it can be removed from the cassette holder 35.

Note that when the tape cassette 1 is operated to protrude from the cassette holder 35, the cassette half 4 and the closing plate 14 are moved relative to each other, and the reel drive shaft insertion holes 12 and 13Φ are closed.

G-9 Mounting operation of tape cassette (FIGS. 1, 5 to 11) The operation of mounting the tape cassette 1 to the digital audio tape recorder configured as described above will be explained.

First, in order to install 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, and the cassette holder 35 allows the tape cassette 1 to be inserted and removed. Move it to the first position. In this state, the tape cassette insertion detection plate 131 attached to the slide guide frame 40
The lock piece 134 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 in which movement is prevented. The cassette holder 35, which is moved by the slide guide frame 40, is also held at the first position.

Here, the tape cassette 1 is inserted into the force center holder 35 from the front lid 10 side through a tape cassette insertion slot formed in the outer casing (not shown) of the tape recorder. The tape cassette 1 inserted into the cassette holder 35 has protrusions 67 and 67 in the concave grooves 20 and 20 formed on the closing plate 14.
is engaged, and the locking of the closing plate 14 to the cassette half 4 is released, and the cassette 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 protrusion 15.degree. 15 on the distal end side of the closing plate 14 comes into contact with the slide regulating protrusion 66, 66, thereby restricting its movement. When the tape cassette 1 is further inserted into the cassette holder 35 while the movement of the closing plate I4 is restricted, the cassette half 4
moves further inward with respect to the closing plate 14, and the insertion holes 18 and 18 formed in the closing plate 14 correspond to the reel drive shaft insertion holes 12 and 13 on the bottom surface of the cassette half 4, and these reel drive shaft insertion holes 12 , 13 are opened. At this time, the engagement protrusion 72 at the tip of the engagement pressing support piece 71 engages with the engagement recess 32 on the upper surface of the cassette half 4. The tape cassette 1 has a pair of cassette pressing support pieces 6 on both sides.
8.68, the center portion is pressed and supported by the engagement pressing support piece 71, and the insertion and holding position with respect to the cassette holder 35 is regulated by the relative engagement between the engagement protrusion 72 and the engagement recess 32. is retained. moreover,
When the cassette half 4 is inserted so that the engagement protrusion 72 engages with the engagement recess 32 as described above, the tape cassette insertion detection piece 131 is inserted by the cassette half 4.
The pressed operation section 132 is pressed. By this pressing operation of the pressed operation part 132, the tape cassette insertion detection piece 131 is pushed up and rotated against the urging force of the temporary spring 137, and the locking piece 134 is disengaged from the locking part 133. be exposed. Then, the slide guide frame 40 is unlocked and becomes movable. When the lock release operation of the slide guide frame 40 is performed, the slide guide frame 40 is slightly moved in the forward movement direction, and the slide guide frame 40 is moved slightly in the forward movement direction, and the slide guide frame 40 that was provided in the slide guide frame 40 that was pressing the press operator 128a of the return position detection switch 128 is Slide operation piece 126
is separated, the pressing state of the pressing operator 128a is released, and the driving motor 3 is released from the returning position detection switch 128.
7 is output.

Based on this signal, the drive motor 37 starts to be driven in the forward rotation direction.

When the drive motor 37 starts rotating in the forward rotation 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 is Integrally with the frame 40, the reel drive shaft insertion hole 12.1 is inserted from the tenth position.
3 and the reel drive shaft 38, 39 are moved to the corresponding second position shown in FIGS. 7 and 8. From here, the drive motor 37 further drives in the normal rotation direction, and the slide guide frame 40
When the cassette holder 35 is further moved in the forward movement direction as shown in FIG. 105, 105 and 1
06. While being guided by 106, the tape cassette is lowered to the mounting position side. Then, the tape cassette 1 inserted and held in the cassette holder 35 is engaged with the reel drive shaft 38, 38 of the tape reels 5, 6, and the mounting position is regulated by the tape cassette positioning bins 180, 180, so that the tape cassette 1 is placed in a predetermined tape cassette position. It is installed in the installation position.

Then, the slide guide frame 40 is attached to the cassette holder 35.
When the tape cassette mounting position is lowered to the tape cassette mounting position, as shown in FIG. The drive in the rotation direction is stopped and the tape cassette loading operation is completed.

Note that when the cassette holder 35 is lowered toward the tape cassette mounting position, the pair of lid opening parts 141 and 142 press operating parts 144 and 145 come into contact with both sides of the lower edge side of the front surface M10 of the tape cassette 1. When the front cover 10 is rotated, the front side of the cassette half 4 is opened, and the magnetic tape 7 extending on the front side is pushed outward, so that it can be pulled out using the loading operation mechanism. It will be done.

Further, when the tape cassette 1 is installed, the tape cassette installation detection switch 3 is activated by the tape cassette 1.
3.33 is pressed, the attachment of the tape cassette 1 is detected, and the loading motor 52 is started to be driven.

As described above, when the front cover 10 is opened and the tape cassette l is loaded into the tape cassette mounting position, the moving guide blocks 43, 44, etc. that constitute the loading mechanism move toward the tape cassette mounting position. The magnetic tape 7 starts moving toward the rotating magnetic RAD device 42 side.
A loading operation is performed in which the tape is wound around the tape guide drum of the rotary magnetic head device 42 and pulled out so that the tape can travel along a predetermined tape running path. When this loading operation is completed, the tape recorder becomes ready to record and/or reproduce a predetermined information signal.

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

To take out the tape cassette 1, first, an eject button provided on the main body of the apparatus is operated. When this eject button is operated, the loading mechanism is operated, and the magnetic tape 7 that has been pulled out to a predetermined tape running path is pulled into the cassette half 4. Following this pulling-in operation of the magnetic tape 7, the drive motor 37 is driven in the reverse direction. Then, the slide guide frame 40 starts to move in the backward movement direction, and the cassette holder 35, which had been lowered to the tape cassette mounting position, is raised to the second position shown in FIG. When the cassette holder 35 is raised, the front cover 10 of the tape cassette 1 is rotated toward the return position by the tear recoil spring 11, thereby closing 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 follower 1 is attached to the second cam surface 178 of the cam body 162.
The cam lever 163 that engages the tension spring 1
75, the rotation operation lever 160 is rotated toward the cassette holder 35 in the direction of the arrow in FIG. As the rotation operation lever 160 rotates, the cassette pressing operation lever 157 is advanced inwardly in the cassette holder 35 in the direction of arrow N in FIG. 19 against the biasing force of the tension spring 168, thereby pressing the cassette. The tape cassette 1 inserted and held in the cassette holder 35 is pressed by the operating section 156 . When the tape cassette 1 is pressed in this way, the cassette half 4 disengages the engagement recess 32 on the top surface and the engagement protrusion 72 at the tip of the engagement pressing support piece 71, while the cassette holder 35 is moved. The tape cassette is moved to the side of the tape cassette insertion/ejection opening 35a. Then, the cassette half 4 and the closing plate 14 are moved relative to each other, and the reel drive shaft insertion holes 12 and 13 are in an initial state where they are closed. Here, the tape cassette 1 is further pressed and operated by the cassette pressing operation unit 156, so that it is protruded from the tape cassette insertion/ejection opening 35a, and at least a part thereof passes through the tape cassette insertion opening formed in the outer casing to the outside of the outer casing. The cassette holder 35 is in a protruding state and can be removed from the cassette holder 35.

Then, the slide guide frame 40 is attached to the cassette holder 35.
When the switch is moved back to the first position shown in FIGS. 1 and 6, the switch operation piece 126 presses the push operation element 1/28a of the return position detection switch 128 as shown in FIG. When the slide guide frame 40 is pressed and it is detected that the slide guide frame 40 has reached the backward movement position, the driving of the drive motor 37 in the reverse direction is stopped, and the operation for taking out the tape cassette 1 is completed.

Note that when the slide guide frame 40 further moves in the backward movement direction after the cassette pressing operation lever 157 has been moved enough to project the tape cassette 1 from the cassette holder 35, the second cam surface of the cam follower 161 The abutting engagement with 178 is released. When the engagement of the cam follower 161 is released, the cassette pressing operation lever 157 is returned to the initial position shown in FIG.

H0 Effects of the Invention As described above, in 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 by the drive motor. When a driving force of After being moved in one of the two directions and stopped at a predetermined stop position, when the driving force of the drive motor is further applied to the slide guide frame, the second limiter spring expands and the rack plate slides. Even when the guide frame is moved and the slide guide frame is moved in either direction of reciprocation, excessive load on the slide guide frame is prevented. When the second limiter spring is extended, a force in the return direction is applied, and a rotational force in the return direction is also applied to the pinion gear meshing with the rack portion of the rack plate, so that the tape cassette is inserted and held in the cassette holder. This enables smooth reciprocating operation by the drive motor of the slide guide frame that moves and operates the tape cassette, enables reliable loading operation of the tape cassette at the tape cassette loading position, and furthermore controls the stop position of the slide guide frame. Also, it is possible to easily control the drive motor for moving the slide guide frame. In particular, in a drive force transmission mechanism that uses a worm gear, it is possible to reliably prevent the phenomenon of biting between the worm gear and the gear that meshes with the worm gear, and to always ensure smooth rotation of the drive force transmission mechanism. .

[Brief explanation of the drawing]

FIG. 1 is a plan view of a digital audio tape recorder to which the present invention is applied, in which the cassette holder is in the first
FIG. 2 is an exploded perspective view showing the tape cassette loading device of the tape recorder. Fig. 3 is a plan view showing a state in which a tape cassette is inserted into the cassette holder constituting the tape recorder, and Fig. 4 shows a state in which the tape cassette is inserted and held in the cassette holder. FIG. FIG. 5 is a left side view of the cassette holder in the first position, and FIG. 6 is a right side view thereof. FIG. 7 is a plan view of the cassette holder moved to the second position, and FIG. 8 is a right side view thereof. FIG. 9 is a plan view of the slide guide frame moved to the innermost position, FIG. 10 is a right side view of the cassette holder moved to the tape cassette mounting position, and FIG.
The figure is its left side view. FIG. 12 is an exploded perspective view of the reciprocating operation mechanism for the slide guide frame. 13 and 14 are schematic side views showing the tape cassette insertion/holding detection mechanism. FIG. 13 shows the tape cassette insertion operation state and the slide guide frame is locked, and FIG. 14 shows the tape cassette insertion/holding detection mechanism. This shows the cassette insertion detection state and the unlocked state of the slide guide frame. 15, 16 and 17 show the front lid opening mechanism of the tape cassette, FIG. 15 is a perspective view showing the state before operation, and FIG. 16 is a rear view thereof. FIG. 17 is a perspective view showing the front cover in a closed state. FIG. 18 is an exploded perspective view of the tape cassette ejecting mechanism from the bottom side, and FIG. 19 is a plan view showing a state in which the tape cassette is ejected from the cassette holder. 20 to 23 show a tape cassette used in a digital audio tape recorder, in which FIG. 20 is a perspective view from the top side when not in use, and FIG. 21 is a bottom perspective view when not in use. It is a perspective view from the side, and the 22nd
This figure is a perspective view with the front cover opened, and FIG. 23 is a bottom view with the closing plate closing 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 8I...Rack gear 82...Temporary rack 83...・The rack gear is attached to the side plate 111... Worm gear 112... Intermediate connection gear 113... Equal tooth 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 attachment position detection switch Applicant Sony Corporation Figure 3 Figure 4 Slide key F+? Figure 12 Slide is a)

Claims (1)

[Scope of Claims] A cassette holder into which a tape cassette is inserted and held; the cassette holder is supported so as to be movable up and down, and also supported to be movable reciprocally on the apparatus main body side, and by this reciprocating operation, the cassette holder is Between a first position where the tape cassette can be inserted and removed and a second position where the reel drive shaft insertion hole opened in the bottom of the tape cassette and the reel drive shaft located on the device main body side correspond. a slide guide frame for vertically moving the cassette holder at the second position; 1
a rack support plate that is biased to slide in one of the reciprocating directions of the slide guide frame by a limiter spring; a rack plate that is biased to move in either one of the reciprocating directions of the frame and is supported by the slide guide frame with the end portion on the side in the biasing direction locked to the rack support plate; and a rack portion of the rack plate. A tape cassette mounting device comprising a drive motor that rotates a pinion gear meshing with the slide guide frame and reciprocates the slide guide frame.