JP3337985B2 - Cassette mounting device and recording or reproducing device provided with the cassette mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette mounting device for elevating and lowering a cassette holder for accommodating a tape cassette, and a recording or reproducing device such as a VTR equipped with the cassette mounting device.

[0002]

2. Description of the Related Art FIG. 10 is a side view of a recording or reproducing apparatus provided with a conventional cassette mounting device. 1 in the figure
Reference numeral 01 denotes a cassette, and reference numeral 102 denotes a cassette holder into which the cassette 101 is inserted. 103 and 104 are a pair of levers constituting a link, which are rotatably connected by a shaft 105. One end of the lever 103 is rotatably supported on a chassis 107 by a shaft 106, and the other end is a long hole 1
08 slidably engages the shaft 109 of the holder 102. One end of the lever 104 is slidably engaged with a long hole 111 of the chassis 107 by a shaft 110, and the other end is rotatably supported by the holder 102 by a connecting member 112 of left and right links.

Reference numeral 113 denotes a spring for raising and extending between the levers 103 and 104. Reference numeral 114 denotes a lock lever, which is a lock member 11 provided on the chassis 107.
5 when the holder is lowered, and holds the cassette holder 102 at the lowered position. A spring 116 biases the lock lever 114 to rotate clockwise.

A cassette 101 is placed in a cassette holder 102.
Is inserted and the cassette holder 102 is pressed, the holder 102 is lowered by the link action of the levers 103 and 104. When the lock at the lowered position is released, the levers 103 and 104 are operated by the spring 113 and the holder 102 is raised.

In this conventional cassette mounting apparatus, a connecting member 112 is provided at one end of a lever 104, and a link lever (FIG. 1) on the opposite side of the cassette holder 102 is provided.
Although not shown at 0, the cassette holder 102 is connected to a lever (not shown), so that the cassette holder 102 can be maintained in a substantially horizontal posture in the lowered position.

[0006]

However, in the above-mentioned conventional apparatus, the spring 116 for urging the lock lever 114 to rotate and the spring 113 for urging the cassette holder 102 upward are provided on the same side of the cassette holder 102. Placed in Such an arrangement is not always suitable for downsizing the device. Further, as the miniaturization progresses, the degree of freedom in designing these springs 113 or 116 becomes smaller, and therefore, the proper selection of the spring load has to be restricted.

Further, since these springs 113 and 116 are arranged at the positions closest to the cassette insertion side, they must be handled with great care so as not to be touched by human hands and deformed.

Accordingly, an object of the present invention is to provide a cassette mounting device which is effectively and appropriately miniaturized, is excellent in usability and handling, and a recording or reproducing device provided with the cassette mounting device.

[0009]

According to the present invention, there is provided a cassette mounting apparatus comprising: a cassette holder into which a cassette is inserted; and a cassette holder arranged on both right and left sides of the cassette holder so that the cassette holder can be raised and lowered with respect to a chassis. A pair of link mechanisms, a lock lever that locks the cassette holder at its lowered position, and a spring that rotationally biases the lock lever. Is arranged in the space between the cassette and the inside of the cassette.

Further, in the cassette mounting apparatus according to the present invention, the rotation biasing spring is a torsion coil spring.

In the cassette mounting apparatus according to the present invention, a center axis of the rotation urging spring is orthogonal to a rotation axis of the lock lever.

Further, in the cassette mounting device of the present invention, a portion of the spring that engages with the lock lever is bent, and the angle formed by the spring is less than 90 °.

Further, in the cassette mounting apparatus according to the present invention, a portion of the spring that engages with the lock lever is bent, and the bending direction is a downward direction of the cassette holder.

Further, in the cassette mounting device of the present invention, the lock lever has a stepped portion, and a portion of the spring that engages with the lock lever is bent, and the height of the bent portion is: The height of the stepped portion is lower than that of the high portion.

Further, a recording or reproducing apparatus according to the present invention includes any one of the above-described cassette mounting apparatuses, a rotating drum apparatus,
A first chassis to which at least the rotary drum device is mounted, and a second chassis having at least the cassette mounting device and a reel base and configured to be slidable with respect to the first chassis. It is characterized by the following.

Further, in the recording or reproducing apparatus of the present invention, the cassette holder loaded with the cassette is lowered from the raised position to the lowered position, and the cassette is mounted on the reel base of the second chassis. The second chassis is slid relative to the first chassis, at least a part of the rotary drum device is relatively inserted into the opening of the cassette, and the tape is wound around the drum peripheral surface. It is characterized by comprising.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a cassette mounting device according to the present invention and a recording or reproducing device provided with the cassette mounting device will be described below with reference to the drawings.

FIGS. 1 to 3 are side views of a VTR provided with a cassette mounting device according to the present invention.
4 is a plan view of the cassette mounting device, FIG. 5 is a side view of one side of the cassette mounting device, and FIGS. 6 and 7 are side views of the cassette mounting device in the middle of the lowering operation. FIG.
FIG. 9 is a schematic view of a mounting portion of the connecting member and the movable substrate, and FIG. 9 is a cross-sectional view when a fixing member for fixing the cassette mounting device to the chassis is mounted.

4 and 5, reference numeral 1 denotes a cassette;
2 is a cassette holder into which the cassette 1 is inserted, 3 is a lever constituting a link, 4 is a connecting member which rotatably supports the holder 2 on a chassis and serves as a lever constituting a link, 5 is a lock lever, Reference numeral 6 denotes a shaft provided on a side surface of the cassette holder 2 for rotatably supporting the lever 3 and the lock lever 5. Reference numeral 7 denotes a cam groove provided on the connecting member 4, and a shaft 8 provided on a side surface of the holder 2 is slidably engaged with the cam groove 7. 9 is the connecting member 4
The center of rotation provided to the lever 3 for rotatably supporting the lever 3. Reference numeral 10 denotes a shaft provided on the lever 3, and the movable substrate 1
1 is slidably engaged with a cam groove 12 provided in the cam groove 1.

In FIG. 1 to FIG. 3, reference numeral 11 denotes a movable substrate which is a sub-chassis as in the case of FIG. 4 and FIG.
Reference numeral 13 denotes a hole provided on the movable substrate 11 and supporting the rotation of the connecting member 4 of the cassette mounting device. Reference numeral 14 denotes a spring for urging the holder 2 stretched between the lever 3 and the connecting member 4 to a raised position. Reference numeral 15 denotes a gear provided on the movable substrate 11. The gear 15 meshes with a damper 16 attached to the cassette mounting device, and applies a load when the holder is raised by viscous resistance of oil contained in the damper 16 to smooth the lifting operation.

In FIGS. 4 and 5, reference numeral 17 denotes a lock lever spring which urges the lock lever 5 to rotate clockwise as shown in FIG. Lock lever spring 1
Reference numeral 7 is attached to a standing bent portion extending downward from the upper plate of the holder 2. This portion is a dead space generated by opening the front cover of the cassette 1 when the cassette descends. The movable substrate 11 is provided with a lock member 18 and a lock detection switch 19 (see FIG. 1), and the locked portion 5a of the lock lever 5 moves the lock member 18 in the lowered position.
And the lock detection switch 19 can be pressed.

In this embodiment, the lock lever spring 17
Is disposed inside the holder 2 in the space between the holder 1 and the cassette 1. As shown in FIG. 4, the lock lever spring 17
The torsion coil spring has a center axis substantially perpendicular to a rotation axis of the lock lever 5. Also, like this, the holder 2
Because it is placed inside, there is no need to worry about human touch.

6 and 7, reference numeral 20 denotes a cassette stopper provided integrally with the movable substrate 11. FIG.
When the cassette 1 is correctly inserted into the holder 2 as shown in FIG.
And does not interfere with the cassette 1. At this time, the front cover unlocking portion 2b for the cassette 1 provided integrally with the holder 2 rotates the front cover lock lever 1c of the cassette 1 in the clockwise direction.
Unlock a.

As shown in FIG. 6, when the cassette 1 is not fully inserted, the lock of the front cover 1a is not released and the cassette 1 interferes with the front plate 1d of the cassette 1 so that the cassette 1 goes further inward. To prevent you from doing so. At this time, the rear end portion 1e of the cassette 1 interferes with the upper end portion 4a of the connecting member 4 to prevent the cassette 1 from lowering at an incorrect position. This prevents interference with other components such as the tape guide posts on the movable substrate 11.

In FIG. 8, a cylindrical projection 9 which is the center of rotation formed on the side surface of the connecting member 4 has its outer peripheral portion engaged with a hole 13 provided in the movable substrate 11, and
Support the rotation of. That is, the rise of the cassette mounting device,
It supports the lowering operation.

FIG. 9 is a cross-sectional view when a fixing member 21 for fixing the connecting member 4 and the movable substrate 11 is attached. The fixing member 21 is a resin component, and is attached to the connecting member 4 while expanding in the direction of arrow B by utilizing its elasticity when inserted from the direction of arrow A in the figure as shown in FIG. And it can rotate integrally with the movable substrate 11. Also, as shown in FIG.
By holding the connecting member 4 and the movable substrate 11 between the one support portion 21a, the cassette mounting device can be pivotally supported on the movable substrate 11 and fixed so as not to come off.

Next, as shown in FIGS. 1 to 3, the movable substrate 11 is provided with a reel base 22 on which the cassette 1 is mounted. The movable board 11 is slidably disposed in a front-rear direction on a fixed board 23 as a main chassis. On the fixed substrate 23, a rotary drum device 24 is arranged at an angle.

In the above configuration, as shown in FIG. 1, when the cassette 1 is inserted into the holder 2 and the holder 2 is pressed from above, the shaft 10 provided on the lever 3 and the side surface of the holder 2 are provided. The holder 2 moves down while the shaft 8 moves along the cam groove 12 provided on the movable substrate 11 and the cam groove 7 provided on the connecting member 4.

With the lowering of the holder 2, the locked portion 5a of the lock lever 5 comes into contact with the lock member 18 of the movable substrate 11, the lock lever 5 is rotated counterclockwise, and the spring 17 is charged. You. And the lock member 18
Is released, the lock lever 5 is rotated clockwise, and the locked portion 5a is released.
Engages with the lock member 18. At the same time, the lock lever 5 presses the lock detection switch 19.

By doing so, the holder 2 is locked at its lowered position as shown in FIG. In this state, the cassette 1 in the holder 2 is mounted on the reel base 22 of the movable substrate 11, and the cassette 1 is pressed by the cassette pressing spring 2a (see FIG. 4) of the upper plate of the holder 2.

Next, when the lock detection switch 19 is turned on, as shown in FIG.
Relative to the rotating drum device 24, a part of the rotating drum device 24 is relatively inserted into the opened opening 1 b of the cassette 1. By inserting the drum and pulling out the tape from the cassette 1 by a tape guide or the like (neither is shown), the tape is spirally wound around the peripheral surface of the rotary drum device 24 and a predetermined tape path is formed. Then, the tape runs, and desired recording or reproduction on the tape is performed by a rotating head or the like.

Next, when an eject command is issued, as shown in FIGS. 3 and 2, the movable substrate 11 is slid in a direction away from the rotary drum device 24, and the tape is unloaded. When the lock lever 5 is rotated clockwise in FIG. 2 and the lock is released, the lever 3 and the connecting member 4 are reversed by the force of the spring 14 as shown in FIGS. Works. At this time, the holder 2 rises, and the cassette 1 can be taken out of the holder 2.

Next, FIGS. 11A and 11B and FIG.
The configuration around the lock lever 5 will be described with reference to FIGS. As described above, the lock spring 17 is attached to the inside of the holder 2, and its operating arm 17a is
The lock lever 5 is urged in a clockwise direction by being exposed to the outside from the side surface of the holder 2 and hooked on the spring hook 5a of the lock lever 5. Operating arm 17a
As shown in FIG. 11B, the arm is bent in the direction of movement of the arm (parallel to the plane of the cassette), so that the lock spring 17 does not come off due to vibration.

As shown in FIGS. 12A and 12B, a cover 25 shown with hatching is attached to the upper surface of the holder 2. This is provided for the purpose of protecting the edges of the holder 2 and the cassette pressing spring 2a, which are press products, and the tip of the operating arm 17a from injuring the user's finger, and improving the appearance. is there.

However, in the above-described device,
The tip 17a of the spring 17 for urging the lock lever 5 to rotate
In order not to touch the portion with the cover 25, it is necessary to project the cover 25 from the upper surface of the holder 2 like an eave as shown in FIG. This is a constraint and hinders miniaturization of the product.

In the improved embodiment described below, the bending direction of the operating arm 17a of the lock spring 17 is set to the descending direction of the holder 2 and the direction toward the step bending portion of the adjacent lever. The tip edge is configured not to touch the finger.

FIGS. 13A and 13B and FIG.
(A) and (b) show improved embodiments. FIG.
(A), (b) and FIGS. 14 (a), (b)
The tip of the operating arm 17a of the spring is bent in the direction of the step bending portion 5a of the adjacent lock lever 5, different from the operating plane of the spring. The height of the bent portion of the operating arm 17a of the spring is set lower than the height of the step bent portion 5a, and the angle θ inside the bend is smaller than 90 °. It is configured to be lower in the height direction of the bending portion 5a than the bending root portion. With this configuration, even if the user's finger accidentally reaches the vicinity of the tip of the lock spring 17 when operating the holder 2, the finger can be moved to the lever 5.
High surface 5b of the step bending portion 5a and the operating arm 17a of the spring
Only touches the outside R portion of the bend, but does not touch the front edge portion. Therefore, the cover 25 does not protrude toward the operation arm 17a.

Further, in this improved embodiment, the torsion spring for preventing the lock lever of the holder 2 has been described. It can also be applied as a method for treating the tip of a spring.

As described above, according to the improved embodiment, the bending direction of the tip of the spring for biasing the lever is opposed to the step bending portion of the adjacent lever, so that the spring tip can be used. It is possible not to touch the finger of the person.

With the above arrangement, the cover member at the tip of the spring can be eliminated by a simple method without adding any other parts, and the product can be reduced in size.

In the above-described embodiment, when the cassette mounting device is mounted on the movable substrate 11, the shaft 10 of the lever 3 is first engaged with the cam groove 12 of the movable substrate 11 from above the movable substrate 11. Next, the connecting member 4 is inserted from above while pushing and expanding the movable substrate 11 using elasticity, and the rotation center 9 of the connecting member 4 is engaged with the hole 14 of the movable substrate 11. Finally, by attaching the fixing member 21 to the connecting member 4, the movable member 11 and the connecting member 4 are sandwiched by the fixing member 21 and the supporting portion 21 a of the fixing member 21, and the connecting member 4 is rotatable with respect to the movable substrate 11. Fixed to Thus, the attachment of the cassette mounting device to the movable substrate 11 can be easily performed from one direction (above).

Although one embodiment of the present invention has been described, the present invention is not limited to the above-described embodiment.
Various effective modifications and applications are possible based on the technical concept of the present invention. For example, in the above embodiment, the example in which the lock lever spring 17 for urging the rotation of the lock lever 5 is a torsion coil spring has been described, but a tension or compression spring or the like may be used.

[0043]

As described above, according to the present invention, in this kind of recording or reproducing apparatus, the lock lever rotation urging spring for locking the cassette holder is arranged in the space inside the cassette holder. By doing so, the degree of freedom in design is increased, and the size can be effectively reduced while optimizing the spring load. Further, by disposing the spring inside the cassette holder which is difficult for a person to touch, it is possible to prevent the spring from being carelessly touched, and to protect components and prevent erroneous operation.

[Brief description of the drawings]

FIG. 1 is a side view of a VTR including a cassette mounting device according to an embodiment of the present invention at a holder elevated position.

FIG. 2 is a side view of the VTR according to the embodiment of the present invention at a holder lowered position.

FIG. 3 is a side view in a recording or reproducing state in which a movable substrate of the VTR according to the embodiment of the present invention has moved.

FIG. 4 is a plan view of the cassette mounting device according to the embodiment of the present invention.

FIG. 5 is a side view of one side of the cassette mounting device according to the embodiment of the present invention.

FIG. 6 is a side view of one of the cassette mounting devices during the lowering operation when the cassette is not correctly inserted in the embodiment of the present invention.

FIG. 7 is a side view of one of the cassette mounting devices during the lowering operation when the cassette is correctly inserted in the embodiment of the present invention.

FIG. 8 is a schematic view of a fixing portion between the connecting member and the movable substrate in the embodiment of the present invention.

FIG. 9 is a cross-sectional view of a fixed portion between the connecting member and the movable substrate according to the embodiment of the present invention.

FIG. 10 is a side view of a recording or reproducing device provided with a conventional cassette mounting device.

FIG. 11 is an explanatory view of a main part of the embodiment of the present invention.

FIG. 12 is an explanatory diagram of a main part of the embodiment of the present invention.

FIG. 13 is an explanatory diagram of a main part of an improved embodiment.

FIG. 14 is an explanatory diagram of a main part of an improved embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cassette 2 Holder 3 Lever 4 Connecting member 5 Lock lever 6 Axis 7 Cam groove 8 Axis 9 Center of rotation 11 Movable board 12 Cam groove 13 Hole 14 Spring 15 Gear 16 Damper 17 Lock lever spring 18 Lock member 19 Lock detection switch 20 Cassette stopper DESCRIPTION OF SYMBOLS 21 Fixed member 22 Reel stand 23 Fixed substrate 24 Rotary drum device

Claims (8)

(57) [Claims] 1. A cassette holder into which a cassette is inserted, a pair of link mechanisms arranged on both right and left sides of the cassette holder so that the cassette holder is supported so as to be vertically movable with respect to a chassis; A lock lever for locking the lock lever at the lowered position; and a spring for rotating the lock lever. The spring for rotating the lock lever is disposed in the gap between the cassette and the cassette inside the cassette holder. mosquito cell Tsu door mounting device according to claim. 2. The cassette mounting device according to claim 1, wherein the rotation biasing spring is a torsion coil spring. 3. The cassette mounting device according to claim 2, wherein a center axis of the rotation urging spring is orthogonal to a rotation axis of the lock lever. 4. The cassette mounting device according to claim 1, wherein a portion of the spring that engages with the lock lever is bent, and an angle formed by the bent portion is smaller than 90 °. 5. The cassette according to claim 1, wherein a portion of the spring that engages with the lock lever is bent, and the bending direction is a descending direction of the cassette holder. Cassette mounting device. 6. The lock lever according to claim 1, wherein the lock lever has a stepped portion, a portion of the spring that engages with the lock lever is bent, and the bent portion has a stepped portion. The height of the cassette mounting device is lower than the height of the stepped portion. 7. The cassette mounting device according to claim 1, a rotary drum device, at least a first chassis to which the rotary drum device is mounted, and at least the cassette mounting device and a reel base. And a second chassis slidably formed with respect to the first chassis. 8. The cassette according to claim 7, wherein the cassette holder loaded with the cassette is lowered from a raised position to a lowered position, and the cassette is mounted on a reel base of the second chassis. The first drum is slid relative to the first chassis, at least a part of the rotary drum device is relatively inserted into the opening of the cassette, and the tape is wound around the drum peripheral surface. A recording or reproducing apparatus characterized by the following.