JPH06139668A - Cassette holder buffering mechanism - Google Patents

Abstract

PURPOSE:To miniaturize a device concerned and also to reduce the weight of a connecting part between an elevator mechanism and a buffer member. CONSTITUTION:The device concerned is a magnetic recording and reproducing device where a cassette holder 11 is freely elevatably supported via the elevator mechanism 17 on a slide chassis 15. An oil damper 47 is provided on the slide chassis 15 on the rear side of the cassette holder 11, and a slide member 45 is fitted to an arm 29 of the elevator mechanism 17, and then a pinion 46 of the oil damper 47 and a rack 44 of the slide member 45 are meshed with each other to connect the oil damper 47 with the elevator mechanism 17. Since the slide chassis 15 is not required to be spread out in width, and the rack 44 and the pinion 46 can be widen in tooth width, members made of resins can be used, and the device can be miniaturized, and then the pinion 46 and the slide member 45 can be reduced in weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning mechanism for cushioning an ascending / descending end of a cassette holder in a magnetic recording / reproducing apparatus in which a cassette holder holding a cassette case is supported by a slide chassis so as to be able to rise and descend.

[0002]

2. Description of the Related Art Among magnetic recording / reproducing devices that use a magnetic tape, there is a so-called 8 mm video. This 8
In millivideo, the slide chassis can store and hold a cassette case wound with magnetic tape.
The built-in lifting mechanism allows the slide chassis to move to the eject position where the cassette holder projects outward from the video main body to insert and remove the cassette case, and to the play position within the video main body using the slide mechanism. At this play position, the magnetic tape in the cassette case can be pulled out and run to perform recording or reproduction.

At the up-and-down moving end of the cassette holder, a shock is cushioned by a buffer member (rotary damper: hereinafter referred to as a damper). The damper has rotation resistance imparted to the rotating portion due to the viscosity of the oil, and is generally attached to the rear end portion of the cassette holder, and the rotating portion is directly connected to the lifting mechanism via a gear. As a result, the impact of the ascending / descending end of the cassette holder can be alleviated without increasing the size of the elevating mechanism.

[0004]

In order to buffer the lifting end of the cassette holder without increasing the size of the lifting mechanism, the damper may be directly attached to the cassette holder. With such a configuration, the cassette holder becomes large and heavy. Further, the damper has a high viscosity at a low temperature to increase the rotational resistance of the rotating portion, and a large force acts on the gear. Therefore, it is necessary to use metal for the meshing portion of the gear and the lifting mechanism in order to prevent damage at low temperatures, which is disadvantageous in terms of weight and cost.

[0005]

SUMMARY OF THE INVENTION The structure of the present invention for solving the above problems is a cassette holder for holding a cassette tape around which a magnetic tape is wound, and a cassette holder that can be raised and lowered through an elevating mechanism. In a magnetic recording / reproducing apparatus provided with a slide chassis slidably provided in the magnetic recording / reproducing apparatus main body, a cushioning member provided in the slide chassis on the rear side of the cassette holder and a cushioning member provided in the elevating mechanism. It is characterized by comprising a connecting member.

[0006]

[Operation] A buffer member is provided on the rear side of the slide chassis,
Since the buffer member and the elevating mechanism are connected through the connecting member, the cassette holder does not become large, and no force acts directly on the elevating mechanism from the buffer member at the connecting portion.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic recording / reproducing apparatus having a buffer mechanism for a cassette holder according to the present invention will be described.

FIG. 1 is a perspective view of the cassette case storage portion, FIG. 2 is a perspective view of the slide chassis, FIG. 3 is a perspective view of the cassette holder, FIG. 4 is a plan view of the cassette case storage portion, and FIG. 4 is in the raised position, as viewed in the direction of arrow V in FIG. 4, FIG. 6 is the view of the cassette case in the lowered position in FIG. 4, and FIG.
The arrow VII in FIG. 8, the cassette case in the lowered position in FIG. 8, the arrow VII in FIG. 4, the arrow IX in FIG.
And FIG. 11 shows the positional relationship between the cassette case and the rotary head drum.

In this embodiment, an 8 mm video is used as a magnetic recording / reproducing apparatus equipped with a reel brake drive mechanism. The cassette holder of the 8 mm video can be projected outward from the video main body by the elevating mechanism and can be slid to the play position with respect to the base chassis of the video main body by being supported by the slide chassis. . In this embodiment, the front side or the front side means the side where the cassette case is inserted into the cassette holder, and the rear side or the rear side means the opposite side.

Further, in the figure, various members for driving the magnetic tape mounted on the slide chassis are omitted.

As shown in FIG. 1, the magnetic tape 1 is housed in a box-shaped cassette case 2 wound around a supply reel 3 and a take-up reel 4. The magnetic tape 1 is exposed by opening the front lid 5 upward so that the magnetic tape 1 can be loaded.

As shown in FIGS. 1 to 5 and 7, the cassette holder 11 has a box shape with front and rear openings, and the cassette case is opened from the front (left in FIG. 5, right in FIG. 7) opening. 2 is to be inserted. The slide chassis 15 has a box shape with an open top, and the cassette holder 11 slides in a state where the plate surface of the cassette case 2 is horizontally moved by elevating mechanisms 16 and 17 provided on both left and right sides (both sides in the elevating direction). It can be raised and lowered freely.

Support portions 13 and 14 for supporting the cassette case 2 are formed on the lower portions on both sides of the cassette holder 11, and a front end portion (insertion opening portion) of the support portion 14 is a tip portion 102. At the tip of the tip 102, a corner 1 that faces the outside of the opening
02a is formed, and the insertion of the cassette case 2 is guided by the tip portion 102.

The support portions 13 and 14 are made of aluminum, and the tip portion 102 including the corner portion 102a of the support portion 14 is made of stainless steel as a structure having higher strength than aluminum. The tip portion 102 is caulked in a state of being added to the support portion 14, and the support member 14 and the tip portion 102 constitute a guide member 202.

Therefore, the tip end portion 102 of the support portion 14 maintains high rigidity, and the plate thickness does not increase. Therefore, the supporting portion 14 is not deformed when the cassette case 2 is inserted, and the weight is less increased than when the reinforcing plate or the like is attached.

At the rear portion of the cassette holder 11 (the rear end portion of the cassette case 2 inserted), the inserted cassette case 2 is inserted.
A stopper 12 is provided to regulate the position of. The stopper 12 is formed by drawing and bending the rear end portion of the support portion 13.

By forming the stopper 12 on the supporting portion 13 by drawing and bending, the strength is dramatically improved without increasing the weight. Therefore, even if the cassette case 2 is repeatedly brought into contact with the stopper 12, the stopper 12 is not deformed, and reliable positioning can always be performed.

A lifting mechanism 1 on one side based on FIGS. 5 and 6.
6 will be described.

As shown in the figure, a pair of arms 19, 20
Are rotatably connected to each other via an intermediate connecting shaft 18, and the front ends of the arms 19, 20, that is, one end of the arm 19, are pivotally supported by the cassette holder 11 by a pivot 21, and The end is pivotally supported on the slide chassis 15 by a pivot 22. Also, each arm 19,
A rear end side of the arm 20, that is, the other end of the arm 19 is pivotally supported by the slide chassis 15 by the long hole 23 and the support shaft 25, and one end of the arm 20 is pivotally supported by the cassette holder 11 by the long hole 24 and the support shaft 26. Has been done. Arm 1
The springs 27 are provided on the upper sides of the connecting shafts 18 of 9, 20.
(A tension spring), the arms 19 and 20 are urged in the upright direction by the tension force of the spring 27.

The lifting mechanism on the other side will be described with reference to FIGS. 7 and 8.

As shown, a pair of arms 29, 30
Are rotatably connected to each other via an intermediate connecting shaft 28, and the front end sides of the arms 29 and 30, that is, one end of the arm 29 are pivotally supported by the cassette holder 11 by a pivot shaft 31, and The end is pivotally supported on the slide chassis 15 by a pivot 32. Also, each arm 29,
The rear end side of 30, i.e., the other end of the arm 29 is pivotally supported on the slide chassis 15 by the long hole 33 and the support shaft 35, and one end of the arm 30 is pivotally supported on the cassette holder 11 by the long hole 34 and the support shaft 36. Has been done. Arm 2
The springs 37 are provided on the upper sides of the connecting shafts 28 of 9 and 30.
(A tension spring), the arms 29 and 30 are urged in the standing direction by the tension force of the spring 37.

The arms 19 and 2 of the lifting mechanisms 16 and 17
By tilting 0 and the arms 29 and 30, the cassette holder 11 moves up and down in a state where it is kept substantially horizontal as shown in FIGS.

The elevating mechanisms 16 and 17 are operated at substantially the same speed by an elevating synchronization mechanism. This lifting synchronization mechanism will be described.

As shown in FIGS. 5 to 8, the lifting mechanism 1
Racks 38, 39 are formed on the upper ends of the arms 20, 30 of the arms 6, 30, respectively. Further, as shown in FIGS. 1, 3 and 4 to 9, pinions 40 and 41 are rotatably attached to the rear side of the cassette holder 11, and the pinion 40 meshes with the rack 38 of the arm 20 and the pinion. 41 is meshed with the rack 39 of the arm 30. One connecting rod 42 is rotatably supported by the cassette holder 11, and the pinion 4 is attached to both ends of the connecting rod 42.
0 and 41 are attached respectively. Pinion 40,
41 is integrally rotated by a connecting rod 42.

Therefore, when the cassette holder 11 is vertically moved by the elevating mechanisms 16 and 17, when the arms 20 and 30 are rotated, the pinions 40 and 41 are rotated via the racks 38 and 39, respectively. Since 41 is connected by a connecting rod 42, the left and right lifting mechanisms 16 and 17 operate at substantially the same speed by rotating in synchronization with each other. Then, the arm 2 of the lifting mechanism 16, 17
The rear end side of 0, 30, that is, the side where the racks 38, 39 are formed is connected to the cassette holder 11 by the long holes 24, 34 and the support shafts 26, 36.
Pinions 4 and 8 slide while moving along with rotation.
0, 41 is rotated at an increased speed. Therefore, the lifting mechanism 16,
When the force applied to 17 differs, that is, the cassette holder 1
Even when a force is applied to only one side of the cassette holder 1, the elevating mechanisms 16 and 17 operate reliably in synchronization and the cassette holder 11 is elevated and lowered.

Further, as described above, the left and right lifting mechanism 1
The springs 27 and 37 are stretched over the arms 19 and 20 and the arms 29 and 30 of the cassette holder 11,
Is raised by urging the springs 27 and 37. Since the biasing force of the springs 27 and 37 is a force capable of raising the cassette holder 11, shock and vibration occur at the rising end of the cassette holder 11. A damper mechanism 43 as a cushioning member for reducing the impact and vibration and gently stopping the cassette holder 11, that is, the cushioning mechanism of the present invention is provided.

The damper mechanism 43 will be described.

As shown in FIG. 2, FIG. 7 and FIG. 8, in the slide chassis 15, the rack 4 is provided on the upper side at the rear side of the elevating mechanism 17 side (the rear side of the cassette holder 11).
A slide member 45 made of resin is provided as a connecting member on which 4 is formed. The slide member 45 is movably supported in the front-rear direction (left and right in FIGS. 7 and 8), and one end of the slide member 45 is pivotally supported (connected) to the rear end of the arm 29.

An oil damper 47 is attached to the inside of the slide chassis 15, and a resin pinion 46 is attached to the rotating portion of the oil damper 47. Pinion 46
The rack 44 of the slide member 45 is meshed with each other, and the movement of the slide member 45 is moderated by the oil damper 47.

When the cassette holder 11 is raised by the lifting mechanism 17, the urging force of the spring 37 causes the arm 2 to move.
9 and 30 rotate in the standing direction. At this time, the rear end of the arm 29 moves forward together with the slide member 45,
The pinion 46 is rotated via the rack 44. The action of the oil damper 47 causes the pinion 46 to gently rotate and the movement of the slide member 45 to become gentle, so that the cassette holder 11 is gently stopped as the shock and vibration at the rising end disappear.

Since the damper mechanism 43 is provided on the slide chassis 15 behind the elevating mechanism 17, it is not necessary to upsize the cassette holder 11 and it is not necessary to widen the width of the slide chassis 15. Further, since the arm 29 of the lifting mechanism 17 and the pinion 46 of the oil damper 47 are connected via the slide member 45, the pinion 46
Since the tooth width of the rack 44 can be made large, the viscosity of the oil damper becomes high, and even if a large force is applied to the pinion 46 and the rack 44, there is no risk of damage, and weight reduction and cost reduction can be achieved.

On the other hand, the lifting mechanism 17 has arms 29, 30.
A lock mechanism 48 for holding the cassette holder 11 in a tilted state, that is, the cassette holder 11 in a lowered state is provided.

The lock mechanism 48 will be described.

As shown in FIGS. 7 and 8, in the slide chassis 15, a hook 50 is rotatably attached to a side portion on the side of the elevating mechanism 17 by a shaft 49 and stretched between the slide chassis 15. It is biased counterclockwise by the spring 51. Also, hook 5
The control plate 53 is rotatably attached by the shaft 52 adjacent to 0, is urged in the counterclockwise direction by the spring 54, and the tip end thereof abuts the hook 50. It is rotated against the biasing force and held at the release position (the position shown in FIG. 7). On the other hand, the arm 30 is integrally formed with a downward extending portion, and the locking pin 55 is fixed to the extending portion. A projection 56 is integrally formed on the lower portion of the hook 50, and a release lever 105 is formed on a base chassis 71 that slidably supports the slide chassis 15.

Therefore, when the cassette holder 11 shown in FIG. 7 is lowered from the raised position (the arms 29 and 30 are in the upright position), the arms 29 and 30 are tilted and the locking pin 55 is provided.
Goes down. Then, the locking pin 55 comes into contact with the regulation plate 53 and pushes down against the urging force of the spring 54, and the hook 5 held at the release position by the regulation plate 53.
0 is rotated counterclockwise by the biasing force of the spring 51. Therefore, as shown in FIG. 8, the hook 50 engages with the locking pin 55 to prevent the arm 30 from standing up, and the cassette holder 11 is restrained in the lowered position (the arms 29 and 30 are in the tilted position). On the other hand, when the protruding portion 56 of the hook 50 contacts the release lever 105 of the base chassis 71, the hook 50 rotates counterclockwise against the biasing force of the spring 51 and engages with the locking pin 55. Is canceled. Then, the arms 29 and 30 stand up by the urging force of the spring 37, and the cassette holder 11 rises.

In FIGS. 5 to 8, 57, 58
Is a detection switch for detecting the tilted state of each arm arm 19, 20 and 29, 30 of the lifting mechanism 16, 17, that is, the lowered state of the cassette holder 11.

As shown in FIGS. 4 and 9, the cassette holder 11 of this embodiment is provided with a tape protector 61. When the cassette holder 11 (cassette case 2) descends, the lid 5 of the cassette case 2 opens due to this movement. At this time, the magnetic tape 1 may adhere to the back side of the lid 5 due to static electricity. The magnetic tape 1 rides on the rotary head drum and is taken to the opposite side, so that it cannot be properly loaded. The tape protector 61 prevents the magnetic tape 1 from riding on the rotary head drum.

A rotating member 63 is attached to the cassette holder 11 by means of a pivot 62 at the rear of the side of the elevating mechanism 17 side, and the two protruding pieces 6 are provided on the outer peripheral portion of the rotating member 63.
4, 65 are integrally formed, and the rear end portion of the arm 29 of the elevating mechanism 17 can come into contact with the one projecting piece 64.
The L-shaped actuating member 6 is adjacent to the rotating member 63.
6 is rotatably supported by a shaft 67, and one end of the operating member 66 extending downward has one projection 6 of the rotating member 63.
5, a long hole 68 is formed at the other end that extends horizontally. Further, at the rear of the cassette holder 11, one end of a tape protector 61 is rotatably attached by a pivot shaft 69 at a position deviating from the center thereof to the side of the elevating mechanism 17 (right side in FIG. 9) by a predetermined amount. A connecting pin 70 is fixed to a position of the 61 toward the other end side from the pivot 69, and the connecting pin 70 is engaged with the elongated hole 68 of the actuating member 66.

Therefore, when the cassette holder 11 holding the cassette case 2 is in the raised position, as shown in FIGS.
As shown in FIG. 0, the lid 5 of the cassette case 2 is closed, while the tape protector 61 faces downward at a predetermined angle θ, and the tip of the tape protector 61 has a rotary head drum 112 mounted on the base chassis 71. It is located at the outer periphery and almost at the center in the radial direction.

When the cassette holder 11 is lowered from this state, as shown in FIGS. 9 and 11, the lid 5 of the cassette case 2 is opened by the release mechanism (not shown), and the magnetic tape 1 is exposed. On the other hand, the arms 29, 3 of the lifting mechanism 17
0 is tilted, and the rear end of the arm 29 contacts the projecting piece 64 of the rotating member 63 and gradually rotates it in the counterclockwise direction in FIG. Then, the projecting piece 65 of the rotating member 63 comes into contact with one end of the operating member 66 to operate (raise) the other end, and the tape protector 61 is rotated upward as the cassette holder 11 descends. The ascending operation of the tape protector 61 is performed later than the opening operation of the lid 5 of the cassette case 2, and the tape protector 61 has the magnetic tape 1 exposed from the cassette case 2 on the outer peripheral surface of the rotary head drum 112. The climb ends just before facing.

When mounting the cassette case 2 in the 8 mm video main body, as shown in FIG. 1, the cassette case 2 is inserted from the front into the cassette holder 11 in the raised position. When the cassette holder 11 is pushed down from the eject (ascending) position shown in FIGS. 5 and 7, the arms 19, 20 and 2 of the lifting mechanisms 16 and 17 are pushed down.
9 and 30 are tilted, and the cassette holder 11 accommodating the cassette case 2 moves to the lowered position. At this time, the cassette holder 11 (cassette case 2) can be lowered while maintaining a horizontal state, and the arms 20, 30 in the left and right elevating mechanisms 16, 17 are operated via the racks 38, 39 and the pinions 40, 41. By interlocking with each other by the connecting rod 42, the left and right elevating mechanisms 16 and 17 operate in synchronization, and the cassette holder 11 is prevented from being twisted or slanted when it descends.

As shown in FIGS. 6, 8 and 9, when the cassette holder 11 is lowered, the cassette holder 11 is restrained by the lock mechanism 48 at the lowered position. That is, when the arms 29 and 30 of the lifting mechanism 17 tilt, the locking pin 5
5 descends together, and the hook 50 engages with the locking pin 55. Therefore, the arm 30 is prevented from standing up and the cassette holder 11 is restrained in the lowered position. Then, the detection switches 57 and 58 detect the movement of the cassette holder 11 to the lowered position.

When the cassette holder 11 is in the raised position, as shown in FIGS. 9 and 10, the lid 5 of the cassette case 2 is closed, and the tip of the tape protector 61 is outside the rotary head drum 112. It is located at the periphery and almost at the center in the radial direction. And cassette holder 1
When 1 descends, as shown in FIGS. 9 and 11, the lid 5 of the cassette case 2 is opened to expose the magnetic tape 1,
On the other hand, the tape protector 61 is rotated upward as the cassette holder 11 is lowered. At this time, the raising operation of the tape protector 61 is performed after the opening operation of the lid 5 of the cassette case 2, and the magnetic tape 1 exposed from the cassette case 2 of the cassette holder 11 facing the outer peripheral surface of the rotary head drum 112. In the lowered position, the tape protector 61 rises to a horizontal position.

Therefore, when the cassette holder 11 (cassette case 2) descends, even if the magnetic tape 1 adheres to the back side of the lid 5 due to static electricity accompanying the opening of the lid 5 of the cassette case 2, Tape 1 and rotating drum head 11
Since the tape protector 61 is located between the magnetic tape 1 and the magnetic tape 2, the magnetic tape 1 is prevented from riding on the rotary head drum 112.

When the cassette holder 11 is completely lowered and held in its position by the lock mechanism 48, the slide chassis 15 is moved to the play position by the drive mechanism (not shown) and the cassette case 2 is loaded. At the play position, the magnetic tape 1 in the cassette case 2 is pulled out and run to perform recording or reproduction.

When the recording or reproducing of the magnetic tape 1 is completed and the traveling is stopped, the loading of the cassette case 2 is released and the slide chassis 15 is moved to the original position (eject position). When the slide chassis 15 moves to the eject position, as shown in FIGS. 6 and 8, the release lever 105 of the base chassis 71 contacts the protrusion 56 of the hook 50, and the hook 50 resists the biasing force of the spring 51. The locking pin 5 by rotating counterclockwise
The engagement with 5 is released. Then, the arms 29 and 30 of the elevating mechanism 17 are erected by the urging force of the spring 37, and the arms 19 and 20 of the elevating mechanism 16 are erected by the urging force of the spring 27, and the cassette holder 11 rises.

When the cassette holder 11 is lifted by the elevating mechanisms 16 and 17, the cassette holder 11 is lifted by the urging force of the springs 27 and 37, but when the arm 29 is erected, its rear end moves forward together with the slide member 45. By rotating the pinion 46 via the rack 44, the action of the oil damper 47 causes the pinion 4 to rotate.
The rotation of 6 is gentle, the shock and vibration at the rising end of the cassette holder 11 are reduced, and the cassette holder 11 is gently stopped.
After the cassette holder 11 moves up, the cassette holder 11
Remove the cassette case 2 from the inside.

In the buffer mechanism of the cassette holder 11 described above, the slide chassis 15 behind the lifting mechanism 17 is used.
Since the oil damper 47 is provided in the above, and the arm 29 of the lifting mechanism 17 and the pinion 46 of the oil damper 47 are connected via the slide member 45, it is not necessary to increase the width of the slide chassis 15, and the rack 44 and the pinion 46 are not required.
The tooth width can be increased and there is no need to use metal.

[0049]

The buffer mechanism of the cassette holder of the present invention is
In the magnetic recording / reproducing apparatus in which the cassette holder is liftably supported by the slide chassis, a buffer member is provided on the slide chassis on the rear side of the cassette holder, and the buffer member and the lifting mechanism are connected by the connecting member. It is not necessary to widen the width, and the width of the member of the connecting portion between the elevating mechanism and the connecting member can be increased, so that it is not necessary to use a highly rigid member such as metal. As a result, the size of the device can be reduced and the weight of the connecting portion can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a cassette case storage section.

FIG. 2 is a perspective view of a slide chassis.

FIG. 3 is a perspective view of a cassette holder.

FIG. 4 is a plan view of a cassette case storage section.

5 is a view taken in the direction of arrow V in FIG. 4 with the cassette case in a raised position.

FIG. 6 is a view as seen in the direction of arrow V in FIG. 4 in which the cassette case is in the lowered position.

FIG. 7: VII in FIG. 4 with cassette case in raised position
View from the arrow.

FIG. 8: VII in FIG. 4 with the cassette case in the lowered position
View from the arrow.

9 is a view on arrow IX in FIG. 4. FIG.

FIG. 10 is an explanatory diagram showing a positional relationship between a cassette case and a rotary head drum.

FIG. 11 is an explanatory diagram showing a positional relationship between a cassette case and a rotary head drum.

[Explanation of symbols]

 1 Magnetic Tape 2 Cassette Case 3 Supply Reel 4 Take-up Reel 11 Cassette Holder 12 Stopper 13,14 Supporting Part 16,17 Lifting Mechanism 19,20,29,30 Arm 38,39 Rack 40,41 Pinion 42 Connecting Rod 43 Damper Mechanism 44 rack 45 slide member 46 pinion 47 oil damper 48 lock mechanism 102 tip part 102a corner part

Claims (1)

[Claims] 1. A cassette holder for holding a cassette tape wound with a magnetic tape, and a slide chassis slidably mounted on a magnetic recording / reproducing apparatus main body for supporting the cassette holder so that the cassette holder can be moved up and down through an elevating mechanism. In the magnetic recording / reproducing apparatus, a cushioning mechanism for a cassette holder, comprising: a cushioning member provided on a slide chassis on the rear side of the cassette holder and a connecting member provided on an elevating mechanism and connected to the cushioning member.