JPH079233Y2 - Tape cassette loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a tape cassette mounting device, and more particularly, to securely locking a holder in which a tape cassette is inserted at a predetermined mounting position and then fixing this locked state. The present invention relates to a tape cassette loading device that can be used.

[Conventional technology]

As a conventional tape cassette mounting device, a lock member is provided on one end side of a holder for inserting a tape cassette,
There is known a structure in which a lock pin is provided on a support arm that supports the holder. In this tape cassette mounting device, after inserting the tape cassette into the holder, the holder is pushed down to rotate the support arm,
The holder is locked at the cassette mounting position by engaging the lock member with the lock pin.

By the way, in this conventional tape cassette mounting device, the holder is simply supported by the support arm, and in the case where the weight reduction is required such as a camera-integrated VTR (video tape recorder), the holder is required. The support arm is thin. For this reason, the mechanical strength of the holder and the support arm is inferior. Therefore, when a downward pushing force is applied to the holder in an oblique direction, the holder or the like may be deformed, and the lock member may not reliably engage with the lock pin. Also, since only one side of the holder is locked by the lock member and the lock pin, the top plate of the holder is not positioned at the same height as the case of VTR or the top plate is tilted with respect to the case. A step may occur between the two.

Further, in the holder, when the opposite side where the lock member is not provided is pushed down, the support arm is deformed and the holder moves downward in a tilted state, so not only the lock member does not reliably engage with the lock pin, but also Sometimes it didn't engage at all. Therefore, in a VTR in which the tape loading mechanism starts operating at the same time as the loading of the tape cassette, if the lock member does not engage the lock pin, the holder is separated from the chassis and returns to the eject position during tape loading. The tape had the drawback that it could become entangled and damaged in the device.

Therefore, the present applicant has proposed a tape cassette mounting device that has excellent mechanical strength and can lock the holder reliably when the tape cassette is mounted (Japanese Patent Application No. 2558 in 1991). That is, in this tape cassette mounting device, the tips of the opposing support arms are interconnected by a reinforcing shaft located on the tape cassette insertion opening side of the holder, and the reinforcing shaft is locked at the cassette mounting position close to the chassis. It is equipped with a configuration to lock at.

By connecting the tips of each support arm with the reinforcing shaft in this way, the mechanical strength of the support arm is improved, so that the holder is always kept parallel to the housing even if the holder is pushed down at any position. Then move down. Moreover, since the reinforcing shaft is locked by the lock mechanism, the reinforcing shaft can be reliably locked.

[Problems to be solved by the device]

However, in the previously proposed tape cassette mounting device having the above-described configuration, if the main body of a VTR or the like is accidentally dropped or strongly struck on a surrounding structure or the like, the impact may cause the lock mechanism to come off the reinforcing shaft. It was Therefore, when an impact force is applied, the holder may return to the eject position between the start of tape loading and the end of tape unloading, and the magnetic tape may be entangled or damaged in the apparatus.

The present invention has been made in order to solve such a point, and provides a tape cassette loading device capable of securely fixing the locked state of the lock mechanism at the same time as mounting the tape cassette and releasing the locked state at the time of ejecting. An object of the present invention is to provide a holder into which a tape cassette is inserted, a support arm that supports both sides of the holder so that they can approach and separate from the chassis, and a holder. In a tape cassette mounting device, comprising: a reinforcing shaft located at the tape cassette insertion opening of the supporting arm and interconnecting opposite ends of the supporting arms; and a lock mechanism that locks the reinforcing shaft at a cassette mounting position where the holder approaches the chassis, A lock fixing mechanism that locks the lock mechanism in the locked state by mounting the tape cassette, and the lock fixing mechanism. A first control cam includes a control cam that controls the operation of the mechanism and a drive motor that rotationally drives the control cam in a predetermined mode. The control cam holds the fixed state of the lock fixing mechanism from tape loading to tape unloading. And a second control mode for releasing the fixed state at the time of ejection.

[Action]

In the first control mode of the control cam, the lock fixing mechanism fixes and holds the lock mechanism in the locked state from the tape loading to the tape unloading. Therefore, the holder does not return to the eject position even if a strong impact force is applied to the body of the VTR or the like. Therefore, it is possible to reliably prevent the magnetic tape from being entangled and damaged.

In the second control mode of the control cam, the lock fixing mechanism releases the lock state of the lock mechanism only at the time of ejecting. Therefore, the holder can be returned to the eject position only when ejecting, and the tape cassette can be taken out or replaced.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a front view of a tape cassette mounting device according to the present invention, FIG. 4 is a left side view of the same device, FIG. 5 is a right side view of the same device with a part thereof omitted, and FIG. It is an exploded perspective view of an apparatus.

In these figures, 20 indicates the chassis and chassis 20
A so-called pop-up type cassette housing 21 for mounting the tape cassette 2 at a predetermined mounting position in the apparatus is provided on the top. This cassette housing 21
Is a holder 22 into which the tape cassette 2 is inserted, and a holder 22.
A pair of support arms 23A, 23B and 24A, 2 supporting both sides of the
It is equipped with 4B. The pair of support arms 23A and 23B is the fourth
As shown in the drawing, the two arms 25A and 24B are rotatably connected to each other with a shaft 25A in a state where their centers intersect,
As shown in FIG. 5, the shafts 25B are rotatably connected with their centers intersecting each other. Tip 2 of support arm 23B, 24B
Pins 26a and 26b are provided on 3b and 24b, respectively, and these pins 26a and 26b are respectively engaged with guide holes 22a and 22b formed on both sides of the holder 22 so as to face each other. One end of a coil spring 27 is attached to a portion of the support arm 23B projecting from the tip 23b, and the other end of the coil spring 27 is attached to a bending piece provided on an upper portion of the holder 22. Further, other pins 27a and 27b are provided on the base portions 23c and 24c of the support arms 23A and 24A, respectively, and these pins 27a and 27b are attached to the guide plate 2
The guide holes 28a and 28b are formed to face 8A and 28B (see FIG. 6), respectively. Both guide plates 28A and 28B are fixed to the chassis 20 by bolting.

Both ends of the reinforcing shaft 29 are fitted and inserted into the arm portions 22c, 22c which are located on the tape cassette insertion opening side of the holder 22 and which are opposed to each other in parallel and project in parallel. , 24A of the support arms 23A, 24A are attached so that the tips 23a, 24a of the two support arms 23A, 24A penetrate.
3a and 24a are integrally connected. Also, the support arm 23
The base portions 23d, 24d of B, 24B are attached to both ends of the base reinforcing shaft 30 in a penetrating state, whereby the base portions 23d, 24d are integrally connected. Supporting members 31 are fitted to both end sides of the base reinforcing shaft 30, and these supporting members 31 and 31 are fixed to the guide plates 28A and 28B by bolts, and the supporting members 31 and 31 are fixed to the bent pieces of one guide plate 28B. Is a coil spring 6
One end of the coil spring 65 is attached, and the other end of the coil spring 65 is attached to a protruding portion projecting from the base portion 24c of the support arm 24A.

As shown in FIGS. 3 and 6, a rotating body 32 having a substantially semicircular cross section is rotatably fitted in the center of the base reinforcing shaft 30. The rotating body 32 constitutes a lock mechanism together with the members described below, and the lock fixing mechanism 1 to be described later.
A turning force is applied in a predetermined direction (see arrow a in FIG. 1) in (see FIGS. 1 and 2). Recesses are formed at both ends of the rotating body 32, and clip members 33, 33 are provided in each recess to prevent the rotating body 32 from coming off from the base reinforcing shaft 30.
Has been inserted. As shown in FIGS. 3 and 6, an abutting piece 40 is provided so as to protrude substantially in the center of the rotating body 32. The side surface of the contact piece 40 is in contact with the protruding portion 41a of the push-down stopper 41. The push-down stopper 41 is rotatably attached to the rising piece 20a rising from the chassis 20, and is always held at the position shown in FIG. 3 via the torsion spring 42. Therefore, the rotation of the rotating body 32 is normally prevented because the contact piece 40 is in contact with the protruding portion 41a of the push-down stopper 41, as shown in FIG. Then, when the reinforcing shaft 29 pushes down the push-down stopper 41 in the arrow direction (see FIG. 3) against the elastic force of the torsion spring 42, the protruding portion 41
Since a is disengaged from the contact piece 40, the rotating body 32 rotates. A lock lever 43 is integrally provided at the other end of the rotating body 32. The lock lever 43 has a hook-shaped engaging portion 43a for engaging with the reinforcing shaft 29 at the tip thereof.

In the vicinity of the lock lever 43, a pair of mode detection levers 44, 4
Five are arranged. These mode detection levers 44, 45 are rotatably supported by a support shaft 46 penetrating the central cylindrical portion, and one end of the support shaft 46 is fixed to the back surface of the lock lever 43. Therefore, since the support shaft 46 is located above the rotating body 32, the rotation axis lines of the mode detection levers 44 and 45 and the lock lever 43 are different. The connecting piece 45a extending from the one mode detecting lever 45 is engaged with the hole of the other mode detecting lever 44, and the connecting piece 44a extending from the mode detecting lever 44.
a is engaged in the recess of the lock lever 43. And
One end of a coil spring 47 is attached above each mode detection lever 44, 45, and the other end of the coil spring 47 is a lock lever.
It is attached to an extension portion 48 extending from 43. Therefore, these mode detection levers 44, 45 are given a pulling force toward the inside of the device by the coil spring 47, so that they are integrally connected to the lock lever 43 by connecting pieces 44a, 45a,
Further, the lock lever 43 is rotated to rotate. Pressing pieces 44b, 45b are integrally formed at the lower ends of the mode detecting levers 44, 45. A cushion material 49 is attached to these pressing pieces 44b and 45b.
Are provided, and microswitches 50a and 50b as mode detectors are arranged at opposite positions. These micro switches 50a and 50b output detection signals corresponding to whether or not the protruding bar is pressed. Microswitch
50a and 50b are attached to the substrate 51. The board 51 is arranged below the chassis 20, and various electronic components and the like are mounted thereon.

Another mode detection lever 52 is arranged near the push-down stopper 41. As shown in FIGS. 3 and 6, the mode detection lever 52 has a protruding portion 32a protruding from the rotating body 32.
It is rotatably supported by a support shaft 53 whose one end is fixed. One end of a coil spring 54 is attached above the mode detection lever 52, and the other end of the coil spring 54 is attached to the protrusion 32a. A stopper 32b is formed integrally with the protruding portion 32a, and a protrusion 52b protruding from the side portion of the mode detection lever 52 is brought into contact with the stopper 32b. Therefore, the pulling force toward the inside of the device is also applied to this mode detection lever 52, and this pulling force is applied to the stopper.
It will be regulated in 32b. Therefore, the mode detection lever 52 also rotates in conjunction with the rotating body 32. Another micro switch 5 is attached to the pressing piece 52a at the lower end of the mode detection lever 52.
0c faces each other, and this micro switch 50c is also attached to the substrate 51.

By the way, the mode detection lever 44 described above is used to detect the type of the tape cassette 2, and in the case of a cassette compatible with standard recording, the micro switch 50a is pressed, and
For high-quality recording cassettes Microswitch 50a
The corresponding detection signals are output without pressing.
The mode detection lever 45 is used to detect whether or not the tape cassette 2 is mounted, and when the tape cassette 2 is mounted at a predetermined position and is pushed back from the back surface of the cassette, the micro switch 50b is pressed. And outputs a mounting detection signal, and outputs a detection signal indicating non-mounting while the microswitch 50b is not pressed. Further, the other mode detection lever 52 is used to prevent erroneous erasure of the tape, and when the tape cassette 2 is loaded and pushed back by the erroneous erasure prevention claw of the cassette 2, recording is possible by pressing the micro switch 50c. A detection signal is output, and if the erroneous erasure prevention claw is broken and absent, the detection signal for recording erasure prevention is output without pressing the microswitch 50c.

A pressing piece 55 projecting downward is integrally provided in the vicinity of the lock lever 43 of the rotating body 32. On the other hand, as shown in FIGS. 3 and 5, a leaf switch 56 as a lock detector is mounted on the substrate 51 so as to face the pressing piece 55. The leaf switch 56 outputs a lock detection signal when the contact pieces 56a and 56b come into contact with each other due to the pressing of the pressing piece 55 accompanying the rotation of the rotating body 32.

The leaf switch 56 and the micro switch 50b corresponding to the mode detecting lever 45 for detecting whether or not the tape cassette 2 is mounted are connected in series and connected to the control unit 60, as shown in FIG. . A motor drive circuit 61 is connected to the output side of the control unit 60, and a tape loading drive motor 62 is connected to the circuit 61.

The drive motor 62 is also used to drive the lock fixing mechanism 1 described later.

As shown in FIG. 5, an opening / closing arm 57 for opening / closing the lid of the tape cassette 2 is attached to one side of the holder 22. A base portion of the opening / closing arm 57 is rotatably attached to a side surface of the holder 22 by a shaft 57a, and a pin 58 protruding from the base portion is engaged with a guide hole 59 provided at a tip end 24b of the support arm 24B.

The tape cassette 2 is shown in FIGS. 7 (A) and 7 (B). This tape cassette 2 contains a supply reel 2a on which a magnetic tape is wound and a take-up reel 2b for winding the magnetic tape, and the magnetic tape portion passed to the front side.
A lid 2c that protects 63a is rotatably provided. Lid 2c
Is in contact with the sliding member 2e pressed by the leaf spring 2d, so that it is urged in the closing direction when the lid is closed, and is urged in the opening direction when the lid is opened. The tape cassette 2 has an erroneous erasure prevention claw 2f on its rear surface, and the rear surface is not provided with an opening 2g showing a cassette for high image quality recording.

That is, this tape cassette 2 is a cassette compatible with standard recording.

The tape cassette loading operation of the tape cassette loading device of the present invention will be described first.

First, the tape cassette 2 shown in FIG. 7 is inserted into the holder 22 as shown in FIG.

Next, apply a downward force to the holder 22 of the eject device,
The pins 26a, 26b of the tips 23b, 24b of the support arms 23B, 24B are moved along the guide holes 22a, 22b, and the support arms 23
The pins 27a, 27b of the bases 23c, 24c of A, 24A are moved along the guide holes 28a, 28b. By this, the support arms 23A, 23B
, 24A and 24B rotate in the direction in which the tips are separated from each other, so that the holder 22 moves downward. That is, the holder 22 approaches the chassis 20. In this case, each tip 2 of the support arms 23A, 24A
3a, 24a are connected by a reinforcing shaft 29, the support arm 23B,
The bases 23d and 24d of 24B are connected by a base reinforcing shaft 30. Therefore, the holder 22 and the support arms 23A, 23B and 24
Since the mechanical strength of A and 24B is reinforced by both shafts 29 and 30, they can rotate without being deformed even if a pushing-down force is applied to one end side of the holder 22.

When the holder 22 is further pushed down to move downward, the reinforcing shaft 29 approaches the base reinforcing shaft 30 while maintaining the parallel state, and as shown in FIG.
Pushes down the push stopper 41. Therefore, as shown in FIGS. 8 (B) and 9, the protrusion 41a of the push-down stopper 41 is disengaged from the contact piece 40. Therefore, since the rotating body 32 rotates on the base reinforcing shaft 30, the lock lever 43 also rotates and the locking portion 43a locks on the reinforcing shaft 29.

As described above, when the reinforcing shaft 29 is locked by the lock lever 43 supported by the base reinforcing shaft 30, the gap between the two shafts 29 and 30 in the locked state becomes constant, so that the holder 22 is always locked at a constant position. Therefore, the top plate of the holder 22 can be matched with the housing of the device, and the top plate of the holder 22 can be prevented from inclining, so that there is no step between the housings of the holder 22. .

Further, since the reinforcing shaft 29 is moved down to the lock position and the push-down stopper 41 is pushed down at this position, the rotating body 32 is rotated to reliably lock the locking portion 43a of the lock lever 43 to the reinforcing shaft 29. You can Therefore, the holder 22
To lower it to the specified mounting position to ensure the reinforcement shaft 29
Can be locked.

Further, while the reinforcing shaft 29 moves down to the lock position, the lock lever 43 retracts from the lock position and
Since it is held in a non-contact state with respect to, the wear of the lock lever 43 and the reinforcing shaft 29 can be prevented. Further, since the locking portion 43a of the lock lever 43 comes into contact with the reinforcing shaft 29 due to the turning force of the rotating body 32, a contact noise and a contact vibration are generated.
There is also an advantage that the operator can know that the reinforcing shaft 29 is securely locked.

At the time when the reinforcing shaft 29 is locked, as shown in FIG.
As shown in FIG. 11, the rotation of the support arm 24B guides the pin 58 of the opening / closing arm 57 to the guide hole 59, so that the opening / closing arm 57 rotates counterclockwise about the shaft 57a. Therefore, the lid 2c of the tape cassette 2 is attached to the tip of the opening / closing arm 57.
Is opened, and preparation for tape loading is completed.

On the other hand, when the lock lever 43 is rotated by the rotation of the rotating body 32,
The mode detection levers 44, 45, 52 also rotate. In this case the holder
When the tape cassette 2 is inserted in the predetermined position of 22,
As shown in FIG. 12, the mode detection lever 45 for detecting the presence or absence of the cassette is pushed back and the microswitch 50b is closed to output a detection signal indicating the presence of the cassette. Further, when the rotating body 32 rotates, as described above, the pressing piece 55 also rotates and the leaf switch 56 for lock detection is closed. Therefore, as shown in FIG. 13, since the detection signal is supplied to the control unit 60 only when both the micro switch 50b and the leaf switch 56 are closed, the tape cassette 2 is securely mounted in the predetermined position, and The motor drive circuit 61 operates only when the tape is securely locked, and the tape loading drive motor 62 operates.

The tape cassette 2 is a cassette compatible with standard recording and does not have an opening 2g. Therefore, since the mode detection lever 44 is not pushed back from the back surface of the tape cassette 2, the detection signal indicating the standard recording cassette is output from the micro switch 50a, and therefore the control unit 60 indicates that the tape cassette 2 is compatible with the standard recording. Judge as a cassette.

Further, the tape cassette 2 has an erasure prevention claw 2f. Therefore, since the mode detection lever 52 is pushed back by the claw 2f, the detection signal is output by the micro switch 50c, and thus the control unit 60 determines that the recording data on the magnetic tape 63 can be erased to perform recording. To do.

By the way, a lock fixing mechanism 1 to be described later, which is an essential part of the present invention.
Includes a control cam 3 (see FIGS. 1 and 2). Since the control cam 3 also constitutes a part of the loading mechanism, the loading mechanism will be described first. That is, FIGS. 14 and 15 are plan views of the loading mechanism and its drive unit.

In FIG. 14, reference numerals 11 and 12 denote outer rails, and inner rails 13 and 14 are arranged inside the outer rails 11 and 12. The outer rail 11 and the inner rail 13 form a guide groove 15 while maintaining a constant space therebetween, and the other outer rails 12 and the inner rail 14 similarly form a guide groove 16 while maintaining a constant space therebetween. A take-up pole base 17 and a supply pole base 18 are arranged at the unloading positions of the guide grooves 15 and 16, respectively, and stoppers 19 are arranged at the loading positions. Both pole bases 17 and 18 have a guide roller 64 rotatably supported on the base 10 and an inclined guide 66, and tape regulation flange portions 64a are attached to the upper and lower ends of the guide roller 64. . The stopper 19 has a recess 19a into which the small diameter portion of the upper end of the guide roller 64 is inserted.

A connecting arm 6 is provided on the bottom surface of each base 10 of both pole bases 17 and 18.
One end of 7 is pivotally supported via a pin. Each connecting arm 6
The other end of 7 is the loading ring 68 on the take-up side and the loading ring on the supply side, as shown in Fig. 15.
It is pivotally supported by each connecting portion 68a, 69a of 69. These loading rings 68 and 69 are arranged concentrically, and the loading ring 68 side is located above. Loading ring
Arc-shaped elongated holes 68b and 69b are formed in 68 and 69, and a coil spring 70 is arranged in these elongated holes. One ends of these coil springs 70 are attached to respective edge portions of the elongated holes 68b and 69b, and the other ends thereof are attached to one end of the slide member 71. Each slide member 71 is provided with an enlarged diameter portion 71a at both ends, and the enlarged diameter portion 71a on the other end side is engaged with the short elongated holes 68c, 69c, respectively.

Teeth 68d are provided on the outer peripheral surface of the upper loading ring 68. An idler gear 72 meshes with these teeth 68d. Teeth 69d are provided on the outer peripheral surface of the lower loading ring 69, and other idler gears are provided on these teeth 69d.
73 is engaged. And the shaft 72a of the idler gear 72
The lower drive gear 74 attached to the gear meshes with another idler gear 73. Therefore, the idler gear 73
Rotation of the idler gear 72 via the drive gear 74.
Is rotated, the loading rings 68 and 69 rotate in opposite directions. The idler gear 73 has a larger drive gear.
75 meshed. A loading gear 76 is attached to the shaft 75a of the drive gear 75, located above the gear 75. The loading gear 76 meshes with a gear portion 3a provided on the lower surface of the control cam 3 which constitutes the lock fixing mechanism 1. Teeth 3b are provided on the peripheral surface of the control cam 3, and a drive gear 77 meshes with these teeth 3b. A transmission gear 78 is attached to the shaft 77a of the drive gear 77, and another gear 79 is attached to the gear 78.
Are in mesh. A pulley 80 is attached to a shaft 79a of the gear 79, and a belt 82 is wound around the pulley 80 and a small-diameter pulley 81. The pulley 81 is attached to the shaft of the drive motor 62.

When the tape cassette 2 is mounted as described above,
Inside the tape path portion of the magnetic tape 63, the guide rollers 64 and the inclined guides 66 of both pole bases 17 and 18 and the capstan 83 are located. The tension regulator arm 84 is located near the supply reel 2a of the tape cassette 2. In the figure, 2b is a take-up reel.

In the loading mechanism having the above configuration, when the drive motor 62 is driven in the normal direction, the pulley 80 rotates via the pulley 81 and the belt 82, so the drive gear 77 rotates via the gears 79 and 78, and the control cam 3 Rotate counterclockwise (see arrow). When the control cam 3 rotates, the loading gear 76 rotates clockwise through the gear portion 3a, so that the idler gear 73 rotates counterclockwise through the drive gear 75. Therefore, the lower loading ring 69 rotates clockwise by the idler gear 73. On the other hand, when the idler gear 73 rotates, the other idler gears 72 rotate clockwise via the drive gear 74, so that the upper loading ring 68 rotates counterclockwise.

When both loading rings 68, 69 rotate in the opposite directions, the connecting arms 67, 67 are pulled, so that the pole bases 17, 18 are guided by the guide grooves 15, 16 by the stoppers 19, 19, as shown by the alternate long and short dash line in FIG. They are guided by 19 side and move. Therefore, the magnetic tape 63 is pulled out from the supply reel 2a by the pole bases 17 and 18. FIG. 16 is a plan view showing a state in which the loading operation is completed.
The positions of 17, 18 are detected when they come into contact with the stoppers 19, 19, and they are stopped and positioned at the loading position shown in FIG. Therefore, the magnetic tape 63 pulled out is rotated by the rotary drum 85.
Wrapped around. Further, the pinch roller 86 is pressed against the capstan 83, and the A / C head 87 is moved and pressed against the magnetic tape 63. Further, the tension regulator arm 84 rotates and a predetermined tension is applied to the magnetic tape 63 by the tension pole 84a, so that the magnetic tape 63 is recorded,
It becomes possible to reproduce.

At the time of tape unloading, the drive motor 62 is reversely driven to reverse the loading mechanism. In this case, the magnetic tape 63 is wound by the supply reel 2a so that the magnetic tape 63 does not sag, and the brake is applied to the take-up reel 2b.

Now, FIG. 1 is a plan view of the lock fixing mechanism 1, and FIG.
(A) to (D) are operation explanatory views of the mechanism 1. This lock fixing mechanism 1 is, as shown in FIG. 1 and FIG.
The sector gear 4 is provided on the lower surface of the chassis 20 and is provided at one end of the rotating body 32. Another sector gear 5 meshes with the sector gear 4, and the sector gear 5 is integrally provided at one end of the rotating member 6. The rotating member 6 is attached to the mounting piece 7 fixed to the chassis 20 by the shaft 6a.
A guide groove 6b is formed at a position opposite to that of the sector gear 4 so as to be rotatable. A pin 8a is inserted into the guide groove 6b, and the pin 8a is provided so as to project from one end of the bent arm 8. The other end of the arm 8 is attached to the chassis 20 as an axis.
It is rotatably attached via 8b. Rotating member 6
One end of the coil spring 9 is attached to the other end on the guide groove 6b side, and the other end of the coil spring 9 is attached to a protrusion 34 protruding from the lower surface of the chassis 20. Therefore, the turning force in the counterclockwise direction in FIG. 1 is applied to the rotating member 6 by the elastic force of the coil spring 9. Therefore, the turning force in the direction a indicated by the arrow is always applied to the rotating body 32 via the sector gear 4 meshing with the sector gear 5. On the other hand, the control cam 3 constituting the lock fixing mechanism 1 has a cam groove 35 of a predetermined shape on the lower surface. As shown in FIG. 2 (A), the cam groove 35 has a circular groove portion 35a for forming the first control (fixed) mode,
And an expansion groove portion 35b for forming a second control (eject) mode. The cam groove 35 is engaged with an engagement protrusion 36 that projects upward from substantially the center of the arm 8.

Next, the operation of the lock fixing mechanism 1 having the above configuration will be described.

First, as shown in FIG. 4, when the holder 22 is at the eject position and the tape cassette 2 is only inserted into the holder 22, as shown in FIG. The groove 35 is located at the outer center of the expansion groove portion 5b. In this state, since the rotating force in the counterclockwise direction is applied to the rotating member 6 by the coil spring 9, the rotating member 32 is rotated in the arrow a direction (see FIG. 1) via the sector gears 5 and 4. Power is given. However, as shown in FIG. 8 (A), the contact piece 40 has the protrusion 41a of the push-down stopper 41.
Since it is in contact with the rotary body 32, the rotary body 32 is prevented from rotating.

Next, as described above, when the holder 22 at the eject position is pushed down, the reinforcing shaft 29 pushes down the push-down stopper 41, and as shown in FIG. More off. Therefore, the rotating member 6
As shown in FIG. 2 (B), since it rotates counterclockwise about the shaft 6a, the rotating body 32 rotates in the direction of arrow a,
The lock lever 43 locks the reinforcing shaft 29. Therefore, the mounting of the tape cassette 2 is completed. On the other hand, when the rotating member 6 is rotated counterclockwise, the pin 8a is moved by the guide groove 6b.
2 is pushed down, the arm 8 moves downward in FIG. 2 (B) while slightly swinging, as shown in FIG. 2 (B). Therefore, the engagement protrusion 36 is displaced to the center inside the expansion groove 35b.

Next, when the tape cassette 2 is loaded, the drive motor 62 is normally driven by the motor drive circuit 61 as described above, and the control cam 3 starts rotating counterclockwise as shown in FIG. The tape loading operation starts. Therefore, since the lower surface of the control cam 3 is displayed in FIG. 2 (C), the control cam 3 rotates clockwise. When the control cam 3 rotates clockwise in FIG. 2 (C), the engagement protrusion 36 is always positioned in the circular groove portion 35a while the control cam 3 is rotating. Therefore, since the swing of the arm 8 and the swing of the swing member 6 are restricted by the circular groove 35a during the rotation of the control cam 3, the sector gear 5
The rotation of the rotating body 32 can be completely prevented by way of 4 and 4. Therefore, since the locked state of the lock mechanism 1 (rotating body 32) can be reliably fixed, a strong impact force is exerted on the mounting device of the present invention during the start and end of the tape loading operation and during recording and reproduction. Even if is added, the lock state of the lock mechanism can be maintained.

On the other hand, when recording, reproduction, etc. are completed and the drive motor 62 is driven in the reverse direction and the tape unloading operation is started, the control cam 3 is rotated counterclockwise, and FIG.
Stop at the position indicated by. Also in this case, since the engaging projection 36 is located in the circular groove 35a, the rotation of the rotary body 32 can be completely prevented until the tape unloading operation is completed. Therefore, even if a strong impact force is applied, the locked state of the lock mechanism can be maintained.

As a result, the holder 22 does not return to the eject position between the tape loading and the tape unloading, so that the magnetic tape 63 can be prevented from being entangled or damaged.

When the tape unloading operation is completed and the eject switch (not shown) is pressed, the drive motor 62 is further driven in the reverse direction, so that the control cam 3 rotates counterclockwise, and as shown in FIG. 2 (D). Stop at the indicated position. Therefore, the engagement protrusion 36 is guided to the expansion groove portion 35b, and this groove portion 35b
It is displaced upward at the end of FIG. 2 (D). Therefore, since the arm 8 swings and moves in the arrow direction,
The rotating member 6 is forcibly rotated clockwise about the shaft 6a against the elastic force of the coil spring 9. As a result, since the rotating body 32 is rotated in the direction opposite to the arrow a direction (see FIG. 1) via the sector gears 5 and 4, the lock lever 43 is disengaged from the reinforcing shaft 29, and at the same time the pressing stopper 41 is released. Return to the position shown in FIG. Therefore, as shown in FIG. 4, the holder 22 is separated from the chassis 20 and is held at the eject position.

After the ejecting operation is completed, the control cam 3 is slightly rotated clockwise by the normal rotation drive of the drive motor 62 and is stopped at the position shown in FIG. 2 (A). Therefore, the tape cassette 2 can be mounted.

In the above embodiment, one drive motor 62 is used as a drive source for both the loading mechanism and the lock fixing mechanism 1, and the control cam 3 is used as a component common to both of these mechanisms. You can

[Effect of device]

As described above, according to the present invention, in the tape cassette mounting device in which the tip of each support arm that supports the holder into which the tape cassette is inserted is connected by the reinforcing shaft, and the reinforcing shaft is locked by the lock mechanism. , The lock state of the lock mechanism is fixed by the lock fixing mechanism, and this lock state is maintained from the tape loading to the tape unloading by the control cam driven by the drive motor, and this lock state is released at the time of ejecting. With this configuration, it is possible to reliably prevent the holder from returning to the eject position even when receiving a strong impact force. Therefore, it is possible to provide a tape cassette mounting device having excellent impact resistance, in which the magnetic tape is not entangled or damaged during tape loading or the like.

[Brief description of drawings]

FIG. 1 is a plan view showing a lock fixing mechanism of a tape cassette mounting apparatus according to the present invention, FIGS. 2 (A) to (D) are plan views showing the operation of the lock fixing mechanism, and FIG. Of the tape cassette loading device according to the present invention in an ejected state, FIG. 4 is a left side view of the same device, FIG. 5 is a right side view of the same device with a part thereof omitted, and FIG. 6 is an exploded view of the same device. 7A and 7B are perspective views and a rear view of the tape cassette, and FIGS. 8A and 8B are plane views showing the relationship between the pressing stopper and the rotating body according to the present invention. Figure, No. 9
The figure shows a front view of the device in a locked state, FIGS. 10 and 11 show a left side view of the device in a locked state and a right side view with a part omitted, and FIG. 12 shows a mounted tape cassette. FIG. 13 is a diagram schematically showing the relationship with the mode detection lever, FIG. 13 is a diagram schematically showing a circuit configuration diagram for tape loading, and FIGS. 14 and 15 are plan views of the loading mechanism and a plan view of its drive section. FIG. 16 is a schematic plan view showing a state when loading is completed. 1 ... Lock fixing mechanism, 2 ... Tape cassette, 3 ...
Control cams, 4,5 …… Sector gears, 6 …… Rotating members, 8 …… Arms, 20 …… Chassis, 23A, 23B, 24A, 24B
...... Support arm, 29 ...... Reinforcement shaft, 30 ...... Base reinforcement shaft, 32 ...... Rotating body, 35 ...... Cam groove, 35a ...... Circular groove portion, 35b ...... Expansion groove portion, 36 ...... Engagement protrusion, 40 …… Abutment piece, 41 …… Pressing stopper, 43 …… Lock lever, 62…
… Drive motor.

Claims (1)

[Scope of utility model registration request] 1. A holder into which a tape cassette is inserted, a support arm for supporting both sides of the holder so as to be able to approach and separate from a chassis, and a holder arm located at a tape cassette insertion opening of the holder. A tape cassette mounting device comprising: a reinforcing shaft interconnecting opposite ends; and a lock mechanism that locks the reinforcing shaft at a cassette mounting position where the holder approaches the chassis. Includes a lock fixing mechanism for fixing the lock fixing mechanism in a locked state, a control cam for controlling the operation of the lock fixing mechanism, and a drive motor for rotationally driving the control cam in a predetermined mode, and the control cam of the lock fixing mechanism. Fixed state from tape loading to tape unloading A first control mode for lifting, the tape cassette loading apparatus characterized by a second control mode for releasing the fixed state during ejection.