JPS63149857A - Tape cassette loading device - Google Patents

Abstract

PURPOSE:To surely position the inserting and taking off positions of a cassette by abutting the guide part of the cover part of a cassette holder against a pressing ball at two positions. CONSTITUTION:When a cassette 1 is loaded and subjected to a cover closing operation, a slider 17 slides the cassette to a rear part with the energizing of a spring 57. When the cover is opened by pushing an ejection button, the locking part 37a of a circular arcuate guide piece 35 and the ball 40 of a pressing member 38 are abutted and stop once in a temporarily releasing state and the dropping of the cassette is prevented by a dropping prevention piece 20. By opening the cover with a hand further, the ball 40 runs over a stepping part 37, abutting against the locking part 37b and the turning in the cover closing direction is regulated. Consequently the positioning of the insertion and taking off of the cassette is ensured by abutting the ball 40 against locking part 37 and the dropping of the cassette caused by a careless ejection operation can be prevented.

Description

[Detailed description of the invention] Hereinafter, the present invention will be explained in the following order.

A. Field of industrial application B1 Overview of the invention C1 Prior art 1 Problems to be solved by the invention E9 Means for solving the problems F0 Effects G. Example G-1 Chassis board (Fig. 1) G-2 Cassette holder (Fig. 1) G-3 Cassette holder positioning mechanism (Fig. 1, Fig. 5A to Fig. 5D) G-4 Cassette holder opening/closing mechanism (Fig. 1 to Fig. 4) G-5 Tape cassette installation operation (FIGS. 2A and 2B) G-6 Tape cassette removal operation (FIGS. 2 to 4) The present invention relates to a recording and reproducing apparatus such as a video tape recorder that records and/or reproduces information signals on a magnetic tape housed in a tape cassette, and particularly to a tape cassette mounting apparatus that mounts a tape cassette onto the recording and reproducing apparatus.

B0 Summary of the Invention The present invention provides a tape cassette that is inserted and held;
a cassette holder rotatably directed to the device main body between a tape cassette insertion position and an ejection position; a ball guide surface provided on the cassette holder and having at least first and second engaging parts; A pressing member that houses a pressing spring and a pressing ball that is urged by the pressing spring in a direction to protrude outward from the front side, and the pressing member brings the pressing ball into contact with the ball guide surface. When the cassette holder is rotated and the pressing ball engages with the first locking portion of the ball guide surface, the cassette holder is moved to the temporary open position. At the same time, when the cassette holder is engaged with the second locking part, the cassette holder is positioned at a position where the cassette can be inserted/taken out, and the cassette holder is slightly released, indicating the end of the unloading operation, and then The present invention provides a tape cassette mounting device for a tape cassette of a video tape recorder, etc., which can be opened manually and does not require a damper member.

C0 Prior Art In a tape recorder such as a video tape recorder or an audio tape recorder, the recording medium is
It has become common to use magnetic tape stored in a cassette case, and such tape recorders include
Usually, a cassette holder is provided for holding a predetermined tape cassette and attaching it to the recording/reproducing section.

Conventionally, many of the cassette holders mentioned above have been of the so-called Bossopu type.
A device as shown in the specification and drawings of Japanese Patent Application No. 60-245213 has been proposed.

D. Problems to be Solved by the Invention By the way, in the tape cassette mounting device of the conventional video tape recorder which raises the tape cassette to a position where it can be easily taken out using the pop-up mechanism and stops it, a spring member that moves the cassette holder to the take-out position; A damper member is required to control the moving speed of this cassette holder.

Therefore, the above damper member is attached to the tape cassette 'A'.
It is hindering the miniaturization, lighter weight, and cost reduction of M.

Particularly, in products such as camera-integrated video tape recorders that are required to be miniaturized to the point of being portable, this damper member poses a major obstacle to miniaturization.

In addition, with the conventional automatic pop-up tape cassette loading device for camera-integrated video tape recorders, when opening the cassette holder, depending on how you hold the video tape recorder, you may accidentally drop the tape cassette on the floor. There is also a risk that the

In order to correct this problem, after unloading the magnetic tape in a tape cassette, the hassle of manually opening and closing the cassette holder to remove the tape cassette from the holder is eliminated by using a tape cassette loading device. It's being served. However, in conventional video tape recorders, the recording and reproducing unit starts unloading the magnetic tape after pressing the 5 eject ports, so it is difficult for the user to release the center holder. To provide a tape cassette loading device which requires a troublesome type of cassette holder, since there is a risk that the cassette holder cannot be recognized and the cassette holder is opened/closed during an unloading operation, causing a failure of the recording/reproducing unit. This is a difficult point above.

Therefore, in the present invention, when taking out a tape cassette from a cassette holder, the cassette holder is slightly opened by an automatic eject operation using an eject port to indicate the end of the unloading operation, and then the opening operation is performed manually. By doing so, it is an object of the present invention to provide a tape cassette loading device for a tape cassette such as a video tape recorder, which eliminates the damper member and solves the above-mentioned problems.

Means for Solving E0 Problems The present invention solves the above-mentioned problems and achieves the above objects by inserting and holding a tape cassette and moving the tape cassette from an insertion position to an ejection position. A cassette holder rotatably directed to the main body of the apparatus, a ball guide surface provided on the cassette holder having at least first and second locking parts, a pressing spring, and a pressing spring extending outward to the front side. a pressing member housing a pressing ball urged in a protruding direction, the pressing member comprising:
When the press ball is attached to the device main body side with the press ball in contact with the ball guide surface, and the cassette holder is rotated and the press ball engages with the first locking portion of the ball guide surface. The cassette holder is positioned at a temporary open position, and when engaged with the second locking part, the cassette holder is positioned at a position where the cassette can be inserted and removed.

F1 action In the present invention, when a tape cassette stored in a cassette holder is moved from a tape cassette mounting device to a tape cassette take-out position, the cassette holder is rotated by an automatic eject operation by an operation of an eject phase, and the cassette is removed from the cassette. When the pressing ball of the elastic member engages with the first locking portion of the first and second locking portions provided on the ball guide surface of the holder, the cassette holder is positioned at the temporary open position. . Further, from this temporary release position, the cassette holder is manually released against the rotation restraining force of the cassette holder by the elastic member, and the pressing ball is moved to the 20th locking portion, thereby allowing the cassette holder to be opened by hand. can be moved to the cassette insertion/ejection position.

G. Embodiments Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The embodiment shown in this drawing is an application of the present invention to a video tape recorder (VTR) that is integrally incorporated into a video camera, and is used for recording and/or playback of so-called 8 mm video tape cassettes. It is something.

The tape cassette mounting device according to the present invention includes a cassette holder 2 having a cassette storage portion into which a tape cassette l is inserted, and a recording/reproducing unit 5 that rotatably supports one end side of both side plates 3 and 4 of this cassette holder 2. The main components are a chassis board 6 on which a cassette holder opening/closing m provided on the chassis board 6, a groove 7, and a cassette holder positioning mechanism part 9 that regulates the amount of opening/closing of the force center holder 2. .

G-1 Chassis Board (FIG. 1) First, the chassis board 6, which constitutes a part of the main body of the recording and reproducing apparatus to which this tape cassette mounting device is attached, is attached to the pillar 10. Side wall plates 12 and 13 are connected to the circuit board 11 via to..., and are provided on the front end sides of both side edges thereof to which a cassette holder 2, which will be described later, can be rotatably attached. A drum device 14 constituting the recording/reproducing section 5 is attached to the center of the front side path of the chassis board 6, and a pair of reel stands 1, 5, and 16 are provided on the rear side of the chassis board 6. There is. A magnetic head for recording and/or reproducing information signals on the magnetic tape of the tape cassette 1 is rotatably attached to the drum device 14, and a cassette holder 2 is attached to each of the reel stands 15 and 16. It is fitted with the reel shaft of the tape cassette 1 inside, so that the magnetic tape can be fed and rewound. Regarding the reel stand 15 on the right side in FIG. 1, only the reel stand support shaft is shown and the rest are omitted in order to show the state of the lock slider 17, which will be described later.

Also, on the chassis board 6, the reel stand 15, 16
Positioning bins 18, 18 and 19, 19 are installed at positions corresponding to the four corners of the tape cassettes to be installed at the front and rear of the tape cassette 1 in the cassette holder 2 at the cassette installation position. It is now possible to control the location. Further, on the rear edge of the chassis board 6, a removal prevention piece 20.20 is provided to prevent the tape cassette 1 from being removed or dropped from the cassette holder 2 when the cassette holder 2 is in the tape cassette mounting position. is formed rising up,
The cassette insertion opening of the cassette holder 1 can be closed.

G-2 cassette holder (Fig. 1) Next, the force-safe holder 2 has a side plate 3.4 formed in a plate shape elongated in the front-rear direction, and a bottom plate 21 is attached between the side plates 3.4. At the same time, a crosspiece 22 is attached to the upper part of the side plate on the rear end side.

The side plates 3 and 4 are spaced apart from each other by a distance substantially equal to the distance in the left-right direction of the tape cassette 1 and are positioned so as to extend in parallel to each other, and their front ends are side wall plates provided on both sides of the front end of the chassis board 6. 12.13 and pivot shaft 23.24
It is rotatably supported.

The bottom plate 21 is provided at the rear ends of the side plates 3 and 4 to connect them, and therefore, the rear part of the cassette holder 2 is formed into a substantially U-shape when viewed from the front. The front edge of the bottom plate 21 is bent into a substantially trapezoidal shape, and the rear edge is cut into a semicircular shape at the center. Furthermore, circular holes 25 and 25 are formed in the bottom plate 21 at positions facing reel stands 15 and 16 provided on the chassis board 6 side, which will be described later. Further, protrusions 26 are provided from both ends of the front end side of the bottom plate 21.
, 27 are provided to protrude forward, and their tip portions are formed in an upright manner to serve as stopper pieces 28 and 29 for the tape cassette 1 to be accommodated in the cassette holder 2.

Therefore, the opening on the rear end side formed by the side plates 3, 4, the bottom plate 21 and the crosspiece 22 is used as a tape force cent storage opening, and the front surface of the tape cassette l is connected to the stopper piece 28.
The tape cassette l can be stored in this cassette holder 2 until it comes into contact with the tape cassette 9.

In addition, a cassette presser 30.30 is attached to the upper part of the side plate 3.4 on the cassette storage side, and the cassette holder 2
The insertion position of the tape cassette 1 within the tape cassette 1 can be maintained without shifting.

Also, on the left side plate 4 side, when the tape cassette 1 is stored in this cassette holder 2, the tape cassette 1
A lock release protrusion 31 is provided in a protruding manner at a position facing the front lid lock piece provided on the front cover.

Therefore, when the tape cassette 1 is inserted into the cassette holder 2 as described above, the front lid locking piece comes into contact with the lock release protrusion 31 to unlock the front lid, making it possible to open the front lid. It is now possible to do so.

Further, on the right side plate 3 side, a lock piece 32 is formed protrudingly formed so that when the cassette holder 2 is opened and closed, the engagement opening is pulled by the holder opening/closing mechanism 7 of the cassette holder 2, which will be described later, to position the cassette holder 2 when the cassette holder 2 is closed. ing. This lock piece 32 is bent at a substantially right angle at its distal end, and its inner edge is configured as a locking portion 32a, and its outer edge is provided with a tapered inclined portion 32b.

Furthermore, mounting pieces 33, 33 and 3 to which the cassette lid constituting the main body of the VTR to which the tape cassette mounting device is mounted are mounted, are mounted on the front and back of the upper end sides of the side plates 3.4.
4.34 is provided by bending the side plate 3.4.

G-3 Cassette Holder Positioning Mechanism (FIGS. 1, 5A to 5D) Next, the cassette holder positioning mechanism section 9 that restricts rotation of the cassette holder will be described. .

The cassette holder positioning mechanism section 9 includes a ball guide surface 35a provided on the front end side of the right side plate 3 of the cassette holder 2, and a pressing member 38 that abuts and faces the ball guide surface 35a.

A ct is rotatably attached to the side wall plates 12 and 13 formed on the chassis substrate 6 of the side plates 3 and 4 of the force center holder 2 on the front end side, and a ct is used to guide the rotation of the cassette holder 2. Guide pieces 35 and 36 are provided on the lower side in a substantially arc shape. The arcuate edge of this guide piece 35 is formed as a ball guide surface 35a that abuts and guides a press ball 40 of a press member 38, which will be described later. Further, the guide piece 35 of the right side plate 3 is provided with a protruding stepped portion 37 on a part of the ball guide surface 35a. This stepped portion 3
7 serves as a first locking portion 37a on one side and as a second locking portion 37b on the other side.

In addition, in this embodiment, by providing the stepped portion 37 on the ball guide surface 35a as described above, the first and second
Although it was decided to provide the locking portions 37a and 37b, the present invention is not limited to this example and a detailed explanation will be omitted. It may also be configured.

Next, the pressing member 38 presses the ball guide surface 3 of the guide piece 35.
They are engaged so as to sandwich 5a.

As shown in FIGS. 5A to 5, this pressing member 3B has a notch 39 formed on its tip side to sandwich the ball guide surface 35a of the guide piece 35. This pressing member 38
A pressing ball 40 is located inside the notch 39.
A housing portion 42 is formed in which a pressing spring 41 that resiliently biases the pressing ball 40 outward toward the distal end side of the pressing member 38 is stored. Moreover, on one side of this pressing member 38,
On the front end and rear end sides, there is a right side wall plate 1 of 6 chassis boards.
For mounting two pieces, pieces 43 and 44 are provided protrudingly. The pressing member 38 is attached to the pieces 43 and 44.
The approximately T-shaped mounting provided on the right side wall plate 12 of the chassis board 6 is engaged with the hole 45 as shown in FIGS. The ball guide surface 35a of the guide piece 35 is inserted into the notch 39, and the ball guide surface 35a is attached so that the press ball 4o can press the ball guide surface 35a. Therefore, this pressing member 3
Rotation of the front gutter holder 2 is restricted at the stepped portion 37 of the guide piece 35 by pressing the guide piece 35 of the guide piece 8 . That is, the pressing ball 40 is pressed against the stepped portion 3.
When reaching the first and second engaging parts 37a and 37b on both sides of the cassette holder 7, the rotation of the right side plate 12 is restricted, and the opening or closing operation of the cassette holder 2 is inhibited. Therefore, unless the cassette holder 2 is rotated against the pressing force of the pressing ball 40, the cassette holder 2 cannot be opened or closed.

Further, the guide piece 36 of the left side plate 4 of the cassette holder 2
An arc-shaped elongated hole 46 is formed approximately in the center of the chassis board 6 , and an engagement pin 47 erected on the left side wall plate 13 of the chassis board 6 is engaged with this elongated hole 46 .

Therefore, the rotation of the cassette holder 2 is controlled by the elongated hole 46.
The cassette holder 2 is regulated within a certain range by a retaining pin 47 that is engaged with the cassette holder 2, thereby suppressing unnecessary rotation of the cassette holder 2.

G-4 Cassette holder opening/closing mechanism section (Figs. 1 to 4) Next, the cassette holder opening/closing mechanism section 7 locks or releases the cassette holder 2 configured as described above.
I will explain about it.

The cassette holder opening/closing mechanism 7 locks and releases the cassette holder 2 by locking or unlocking the lock piece 32 provided on the cassette holder 2, that is, opening/closing the holder. The mechanism section 7 includes a swing arm 49 having a lock roller 48 that engages with the lock piece 32 of the cassette holder 2 to lock the cassette holder 2, and a lock slider 17 that swings the swing arm 49. The main components include a pressing piece 50 that presses the cassette holder 2 in the opening direction when the locking piece 32 is unlocked by the locking roller 48, and a slider stopper 51 that restricts the sliding of the locking slider 17. .

The lock slider 17 is attached to the right side edge of the chassis board 6 so as to be slidable within a certain range. That is, the lock slider 17 as a whole is formed into an elongated plate shape in the front-rear direction, with a rising piece 52 formed at the front end thereof, and elongated holes elongated in the front-rear direction at two positions spaced apart from each other in the front-rear direction. 53,
54 is formed. And these long holes 53.54
Bins 55 and 56 installed on the chassis board 6 are engaged with each other to restrict the sliding range of the lock slider 17. Furthermore, a tension spring 57 is hooked between one of the pins 55 and the rising piece 52 on the tip side of the lock slider 17, so as to constantly move the lock slider 17 toward the rear side of the chassis board 6. is energized.

The lock slider 17 is slid toward the front side of the chassis board 6 against the tension spring 57 by a lock slider driving member.

Although a description of this lock slider driving member will be omitted, for example, when the magnetic tape in the tape cassette 1 is loaded onto or unloaded from the drum unit 14 by interlocking with a tape loading mechanism, when the unloading operation is completed, the lock slider It is sufficient if the lock slider 17 is slidably operated by pressing the tip side rising piece 52 of the chassis board 6 toward the front side of the chassis board 6.

Further, a substantially trapezoidal protrusion 58 is integrally formed in the substantially central portion of the lock slider 17 in an upright manner. This projecting piece 58 has a substantially U-shaped notch 59 formed in its center, and a guide hole 60 is bored along the length direction of the lock slider 17 at the proximal end of this rising piece 52. has been done.

A first opening 61 is provided at the upper end of the chassis board 6 at a position corresponding to the guide hole 60. Further, the side edge of the first opening 61 is the same as the side edge of the chassis board 6, and a hanging wall 62 is provided on the lower surface side of the chassis board 6 along this side edge. The arm portion of the swinging arm 49 rotatably attached to the hanging wall 62 by a support shaft 63 is inserted through the first opening 61 and the guide hole 60 to pass through the trapezoidal protrusion of the lock slider 17. It is attached so as to protrude to the 58 side.

A penetrating pin 64 is installed at the tip of the arm portion of the swing arm 49, and the penetrating pin 64 is inserted into the notch of the protruding piece 5B on the trapezoidal upper protruding piece 58 side of the lock slider 17. 59, and a lock roller 48 is rotatably attached to the opposite surface thereof. Therefore, this I8 swing arm 49 swings as the lock slider 17 slides in the front-rear direction, and the lock roller 48 on the tip side of the swing arm 49 is moved into the first opening 61 by t. It is possible to move upward. This lock slider 17 is connected to the chassis board 6.
When the swing arm 49 swings as the swing arm 49 moves rearward, the lock roller 48 attached to the tip side of the swing arm 49 locks the lock piece 3 of the cassette holder 2.
2 can be engaged.

Next, a slider stopper 51 is attached to the support shaft 63 of the swing arm 49. This slider stopper 51 is formed in an abbreviated shape, and a fitting hole 65 is provided on the long side 51a side of the slider stopper 51 for rotatably attaching the slider stopper 51 to the support shaft 63 of the swing arm 49. is formed, and the tip of the short side 5Lb side faces the chassis board 6 side, and further this short side 51b
The pressing piece 50 bent toward the side in a substantially rectangular shape is connected to this short side 51.
It is attached so that it protrudes more than b. The short side 51b of the slider stopper 51 is inserted through a second opening 66 formed in the chassis board 6 and projects toward the rear end of the lock slider 17. One arm 67 of a torsion spring 67 fitted onto the support shaft 63 is attached to the slider stopper 51.
a is in elastic contact with the slider stopper 51 so as to elastically bias it upward. Therefore, the slider stopper 51 is biased in such a direction that the short side 51b always protrudes toward the upper surface side of the chassis board 6 at the second opening 66, and the short side 51b side of the Rofku slider 17
By coming into contact with the rear end of the lock slider 1,
7 can be prevented from sliding toward the rear side of the chassis board 6.

However, due to the closing IEm operation of the cassette holder 2, the tip of the pressing piece 50 of the slider stopper 51 is pressed by the bottom plate 2I of the cassette holder 2, and the short side of the slider stopper 51 resists the biasing force of the torsion bar 267. When the side 51b sinks into the second opening 66, the slider stopper 51 no longer restricts the lock slider 17 from sliding rearward. Then, the lock slider 17 is connected to the tension spring 5.
7 slides toward the rear side of the chassis board 6, and this lock slider 17 opens the second opening 6.
6 is closed except for the portion of the slider stopper 51 from which the pressing piece 50 protrudes.

Therefore, the tip of the short side 51b of the slider stopper 51 comes into contact with the lower surface of the lock slider 17, and the upward rotation of the slider stopper 51 is restricted. Therefore, only approximately half of the pressing piece 50 of the slider stopper 51 can protrude toward the upper surface of the chassis board 6. At this time, the swing arm 49 that is synchronized with the lock slider 17 is moved to a position where its lock roller 48 engages the lock piece 32 of the cassette holder 2. Therefore, the lock piece 32 of the cassette holder 2 is engaged with the lock roller 48, and the cassette holder 2
is locked in the holder cover closed position, which is the mounting position of the tape cassette.

G-5 Tape cassette mounting operation (FIG. 2A and FIG. 2B) Next, the tape cassette 1 is stored in the cassette holder 2 of the tape cassette mounting device configured as described above, and the tape cassette 1 is inserted into the cassette holder 2. The operation for closing the lid and attaching the tape cassette will be described below.

First, the tape cassette 1 is stored in the cassette/nodule holder 2 configured as described above through the tape cassette storage opening with the front side of the tape cassette 2 facing forward. At this time,
The front lid lock piece 32 of the tape cassette 1 comes into contact with the lock release piece 31 inside the cassette holder 2 to unlock the front lid. Next, the cassette holder 2 is pressed by hand to close the cassette holder 2 and move the tape cassette to the mounting position. That is, when the cassette holder 2 is pressed by hand to close the cassette holder 2, the tip of the pressing piece 51 of the slider stopper 51 is first pressed downward by the bottom plate 21 of the cassette holder 2, and the torsion spring 67 is pressed downward. The short side 51b of the slider stopper 51 sinks into the second opening 66 against the biasing force. Then, the rearward sliding restriction of the lock slider 17 by the slider stopper 51 is released, and the lock slider 17 is slid toward the rear side of the chassis board 6 by the biasing force of the tension spring 57. At this time, the swing arm 49 that is synchronized with the lock slider 17 swings, and the lock roller 48 of the swing arm 49 engages the lock piece 32 of the force center holder 2 to lock the cassette holder 2. Further, due to the sliding of the lock slider 17, the pressing piece 50 of the slider stopper 51 is pushed into the second opening 66.
The lid is closed except for the protruding part. Then, the tip of the short side 51b of the slider stopper 51 comes into contact with the lower surface of the lock slider 17, and the slider stopper 5
1 is in a state where the upward rotation is restricted. Therefore, the force center holder 2 is positioned with the lid closed, and the tape cassette 1 inside the holder 2 can be positioned at the tape cassette mounting position.

In addition, in such a holder mounting operation, when pressing by hand, it is sufficient to press the cassette holder 2 by exceeding the rotational force of the pressing member 38 that restricts the rotation of the cassette holder 2 in the closing direction. That is, the second stepped portion 37 formed on the guide piece 35 of the right side wall plate 12 of the cassette holder 2 is pressed by hand.
The pressing ball 40 of the pressing member 38 passes over the locking portion 37b and moves the pressing ball 40 in the closing direction along the ball guide surface 35a, thereby moving the cassette holder 2 to the tape cassette mounting position. be able to.

Further, as the tape cassette I moves to the mounting position, the front lid of the tape cassette I is opened and closed by relative engagement between the front lid opening and closing member (not shown) and the front lid.

In this way, when the cassette holder 1 is positioned at the cassette loading position with the front cover of the tape cassette 1 opened, the bottom surface of the tape cassette 1 inside the cassette holder 2
a is positioned by contacting with the positioning pins 18.degree.18 and 19.19.

When the tape cassette 1 has been positioned at the mounting position, a tape loading mechanism (not shown) pulls out the magnetic tape from the tape cassette 1, and loads the magnetic tape onto the drum device 14.

G-6 Tape cassette ejecting operation (Figs. 2 to 4) Next, as described above, the tape cassette ejecting operation involves unlocking the cassette holder 2 positioned at the tape cassette mounting position and ejecting the cassette tape 1. explain.

First, in the mounted state of the cassette holder 2 as shown in FIG. 2A, the pressing ball 40 of the pressing member 38 is pressed against the stepped portion 37 formed on the guide piece 35 of the cassette holder 2 as shown in FIG. 2B. It is located at a distance from the other. In this state, when the eject button provided on the operating section of the recording/reproducing device (not shown) is pressed, the unloading operation of the magnetic tape is automatically started, and the tape is pulled out from the tape cassette 1 and loaded into the drum device 14. At the same time, the tape loading of the magnetic tape is released, and the winding side of the reel stand 15.degree. 16 rotates to wind up the pulled-out magnetic tape and store the magnetic tape in the tape cassette l.

At the same time as the tape is removed and the operation is completed, the lock slider 17 is moved to the chassis board 6 by a lock slider driving member (not shown).
The front side of the chassis board 6 resists the biasing force of the tension spring 57 that biases it toward the rear side of the
slide in the direction.

When the lock slider 17 is slid toward the front side of the chassis board 6, the swing arm 49 swings in conjunction with the lock slider 17, and the lock roller 48 attached to the swing arm 49 swings. The engagement of the lock piece 32 of the cassette holder 2 is released. Further, the upper surface of the second opening 66 is also opened by sliding of the lock slider 17, and the rotation restriction of the slider stopper 51 is released. Therefore, this slider stopper 51
A pressing piece 5o attached to the tip presses the bottom plate 21 of the cassette holder 2 in the direction in which the cassette boulder 2 is opened.

When the cassette holder 2 is unlocked as described above and the pressing piece 5o presses the cassette boulder 2 in the opening direction, the cassette holder 2 is opened as shown to the third foreigner. However, when the cassette boulder 2 is rotated in the opening direction as shown in FIG. Locking part 3
7a comes into contact with the pressing ball 40 housed within the pressing member 38. Then, the rotation of the cassette holder 2 in the opening direction is regulated by the pressing force of the pressing ball 40 of the pressing member 38, and the rotation of the cassette holder 2 in the lid opening direction is prevented. Therefore, it will be temporarily stopped at the temporary open position shown in FIG. 3A. At this time, the removal prevention piece 20 formed rising on the rear end of the chassis board 6 is still in contact with the bottom of the rear end of the tape cassette 1 in the cassette holder 2, and the tape cassette 1 is moved to the cassette holder 2.
It cannot be extracted from. Therefore, the tape cassette 1 is not removed from the cassette holder 2 and does not fall.

The operation for the cassette holder 1 to reach the temporary open position is automatically performed by a mechanical drive operation each time the eject button is pressed.

Then, the user confirms that the cassette holder 2 has been popped up to the temporary open position, the unloading operation has been completed at the tape cassette mounting position, and the cassette holder 2 is now ready to be opened. can do.

Therefore, the cassette holder 2 in this temporary open position is further opened by hand, and the cassette holder 2 is inserted into the cassette.
By moving the tape cassette to the take-out position, the tape cassette storage opening is opened. In this manual opening operation, as shown in FIG. 4B, the guide piece 35 by the pressing member 3
The cassette holder 2 is rotated beyond the rotation regulating force of the first locking part 37a of the step part 37, and the pressing ball 40 of the pressing member 2 moves from the position of the first locking part 37a to this step. The cassette holder 2 is opened by moving it over the portion 37. Then, insert the cassette holder 2 as shown in Figure 4A.
Move it to the extraction position. When the cassette holder 2 reaches this cassette insertion/removal position, the cassette storage opening of the cassette holder 2 is released from the removal prevention piece 20 provided on the rear end side of the chassis board 6, and the tape inside the holder 2 is released. The cassette 1 can be taken out, and the pressing ball 40 of the pressing member 38 is
At the take-out position, the second locking portion 37b of the stepped portion 37 of the guide piece 35 restricts the rotation of the cassette holder 2 in the lid closing direction as shown in FIG. 4B. be done. Therefore, the cassette holder 2 is positioned at this cassette insertion/removal position. Therefore, the tape cassette 1 can be easily removed or inserted.

Further, the cassette holder 2 is connected to the left side wall plate 13 described above.
Since the rotation range is restricted to a certain extent by the engagement pin 47 installed in the cassette holder 2, the cassette holder 2 will not be opened to an unnecessary extent.

H0 Effects of the Invention According to the present invention, when moving the tape cassette stored in the cassette holder from the tape cassette throat mounting position to the tape cassette ejection position, the cassette holder rotates depending on the automatic eject operation by operating the eject button. When the pressing ball of the elastic member engages with the first locking portion of the first and second locking portions provided on the ball guide surface of the cassette holder, the cassette holder is temporarily opened. positioned in position. Further, from this temporary release position, the cassette holder is opened by hand against the rotation restraining force of the cassette holder by the elastic member, and the pressing ball is moved to the second locking part, thereby allowing the cassette holder to be opened. The holder can be moved to the cassette insertion/removal position.

Therefore, in the present invention, when taking out the tape cassette from the cassette holder, the end of the unloading operation can be indicated by slightly opening the cassette holder by the automatic ejecting operation by the eject phase. Therefore, the user can easily recognize the end of the unloading operation, and there is no need to open the cassette holder during the unloading operation.

Further, in this state, the tape cassette cannot be taken out yet, so that the tape cassette will not fall out of the cassette holder even if an inadvertent eject operation is performed.

After the cassette holder is slightly opened, the user manually opens the cassette holder, thereby providing a compact and lightweight tape cassette loading device for tape cassettes such as video tape recorders. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a tape cassette mounting device according to the present invention. 2A, B to 4A, B are diagrams showing the operation of this tape cassette loading device. FIG. 2A is a cross-sectional side view showing the tape cassette loading position, and FIG. Figure 2A
FIG. 3B is an explanatory diagram showing the relationship between the pressing ball of the pressing member and the ball guide surface in the state shown in FIG. FIG. 4B is an explanatory diagram showing the relationship between the pressing ball of the member and the ball guide surface, FIG. 4A is a cross-sectional side view showing the tape cassette insertion/removal position, and FIG. FIG. 3 is an explanatory diagram showing the relationship between the pressing ball of the member and the ball guide surface. Further, FIGS. 5A to 5D are views showing the pressing member, FIG. 5A is a perspective view showing the state before it is temporarily attached to the side wall of the chassis board, and FIG. 5B is a perspective view showing the state after it is attached. ,
Figure 5C is a rear perspective view, and the fifth diagram is A-A in Figure 5C.
FIG. 1...Tape cassette 2...Cassette holder 3.4...Side plate 6...Chassis board 7...Cassette holder opening/closing mechanism 9...Cassette holder positioning mechanism section 12.13.
...Side wall plate 17...Lock slider 32...Lock piece 35, 36...Guide piece 35a...Ball guide surface 37...Step part 37a...First locking part 37b...・Second locking part 3 days...Press member 40...Press ball 48...4 lock rollers...Swing arm 50...Press piece 51...Slider stopper

Claims (1)

[Scope of Claims] A cassette holder into which a tape cassette is inserted and held, and which is rotatably directed to an apparatus main body between an insertion position and an ejection position; A pressing member that houses a ball guide surface having first and second locking parts, a pressing spring, and a pressing ball that is biased by the pressing spring in a direction to protrude outward on the front side. The pressing member is attached to the apparatus main body side with the pressing ball in contact with the ball guide surface, and when the cassette holder is rotated, the pressing ball is brought into contact with the first locking portion of the ball guiding surface. A tape cassette attachment characterized in that when engaged with a second locking part, the cassette holder is positioned at a temporary open position, and when engaged with a second locking part, the cassette holder is positioned at a position where cassette insertion and ejection operations are possible. Device.