JP3126264B2 - 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 apparatus suitable for use in a magnetic recording / reproducing apparatus or the like.

[0002]

2. Description of the Related Art A cassette mounting apparatus used in a magnetic recording / reproducing apparatus or the like comprises a cassette holder for holding a cassette and a link mechanism for moving the cassette holder to a predetermined position. Is disclosed in Japanese Patent Application Laid-Open No. 61-220166.

Hereinafter, such a conventional cassette mounting apparatus will be described with reference to FIGS. 8 and 9. FIG. However, FIG. 8 is a side view showing the cassette mounting apparatus in a state where the cassette holder is raised, that is, after the cassette is ejected or in a state of waiting for the insertion of the cassette. FIG. 9 shows a state where the cassette holder is lowered and an appropriate locking mechanism (not shown) is used. ) Is a side view showing the cassette mounting device in a state where the cassette is held at a predetermined height at which the cassette is mounted, wherein 1 is a cassette holder, 1a is a guide groove, 1b is a fulcrum, 1c is a stopper portion, 2 is A link, 2a is pin, 2
b is a fulcrum, 3 is a B link, 3a is a pin, 3b is a pin, 4
Is a pin, 5 is a chassis, 5a is a fulcrum, 5b is a guide groove, 6
Is a slider, 7 is a biasing spring, and 8 is a damper.

In FIG. 8, a cassette holder 1 for holding a cassette (not shown) has a guide groove 1a for guiding and sliding a pin 2a implanted at one end of an A-link 2.
And a fulcrum 1b for rotatably attaching a pin 3a planted at one end of the B link 3. Each of the A link 2 and the B link 3 has a substantially central portion rotatably attached to each other by a pin 4 and has an X shape. A pin 2b is implanted at the other end of the A-link 2, and the pin 2b is rotatably attached to a fulcrum 5a on the chassis 5. The other end of the B link 3 has a pin 3b.
The pin 3b is slidably fitted in a guide groove 5b provided in the chassis 5. This pin 3b
Is also locked to a slider 6 slidable in the left-right direction in the drawing.
Is urged to the left in the drawing by an urging spring 7 for raising. Further, a damper 8 is engaged with the slider 6, and the damper 8 generates viscous resistance only when the slider 6 moves leftward in the drawing.

[0005] The operation of the cassette mounting apparatus having the above configuration will be described below.

In the state shown in FIG. 8, the biasing spring 7 pushes the pin 3b on the B-link 3 to the left in the drawing via the slider 6, thereby turning the B-link 3 clockwise. A torque and a torque for rotating the A link 2 in a counterclockwise direction are generated.
Since the upper pin 2a is regulated by the stopper 1c provided on the left side of the guide groove 1a on the cassette holder 1, the cassette holder 1 is stationary.

When the cassette holder 1 in the state shown in FIG. 8 is pushed up and down in the drawing, the guide grooves 1a on the cassette holder 1 correspond to the pins 2a on the A-link 2 and the fulcrums 1b on the cassette holder 1 correspond to the B. The pins 3a on the link 3 are pushed downward, respectively. The A link 2 rotates clockwise about the pin 4 as a fulcrum, and the B link 3 rotates counterclockwise about the pin 4 as a fulcrum. The upper pin 2a slides in the guide groove 1a on the cassette holder 1, the pin 3b on the B link 3 slides in the guide groove 5b on the chassis 5 rightward in the drawing, and the cassette holder 1 descends. .

During the lowering operation, the urging spring 7
Need to push the cassette holder 1 with a force to overcome the load resistance applied to the pin 3b on the B link 3. In this operation, the damper 8 does not generate viscous resistance due to the one-way clutch (not shown).

When the cassette holder 1 completes the lowering operation and is locked by a suitable lock mechanism, the state shown in FIG. 9 is reached, and a cassette (not shown) is mounted.

When the lock mechanism is released in the state shown in FIG. 9, the slider 6
And the leftward biasing force on the pin 3b causes the A link 2 to rotate counterclockwise around the pin 4 and the B link 3
Are rotated clockwise around the fulcrum. At the same time,
The pin 2a on the A link 2a slides in the guide groove 1a on the cassette holder 1, and the pin 3b on the B link 3 slides in the guide groove 5b on the chassis 5 to the left in FIG. As a result, the pins 2a and 3a lift the cassette holder 1 and reach the state shown in FIG.

In this operation, since the viscous resistance generated by the damper 8 acts on the slider 6, the cassette holder 1 slowly rises, and the pin 2a on the A-link 2 is moved to the stopper portion on the cassette holder 1. 1c is prevented from impacting.

[0012]

However, in the above-mentioned conventional example, depending on the structure of the damper 8, the rise speed of the cassette holder 1 tends to vary unless the viscous resistance force generated by the damper 8 is managed. There's a problem.

Further, a damper 8 in the cassette mounting device is provided.
Although the function is not an essential function required for the magnetic recording / reproducing apparatus, the cost is high and it is not particularly preferable for a low-cost model. However, if the damper 8 is removed, When the cassette holder 1 is lifted, the pins 2a on the A-link 2 come into contact with the stoppers 1c on the cassette holder 1 vigorously, generating an unpleasant metal sound and deteriorating the quality.

An object of the present invention is to provide a cassette mounting apparatus which solves such a problem and can reduce the impact when the cassette holder is lifted by inexpensive means.

[0015]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a rotatable link and a movable cassette.
The holder and the link are connected, and the link rotates.
As a result, the protrusion implanted at one end of the link is
While sliding along the guide groove provided in the
The holder moves and the cassette placed on the cassette holder
The cassette is mounted so that the unit moves to the specified position.
A cassette mounted on the cassette holder;
The protrusion comes into contact before the
And a shock-absorbing member, which is mounted on the cassette holder.
Impact when the cassette completes its movement to the predetermined position
Is configured to be able to absorb the heat.

[0016]

[Function] When the cassette holder is raised, the protrusion on the link is
Before the stopper portion provided in the guide groove of the cassette holder, the buffer member abuts, the protrusion causes presses the buffer member before contact with the stopper portion is elastically deformed. Therefore, the repulsive force from the buffer member is applied to the convex portion, the convex portion <br/> is impulsively prevents impinging on the stopper portion,
No unpleasant metal sounds are generated.

Further, when the cassette holder is lowered to mount the cassette, the buffer member presses the protrusions on the link. Thereby, backlash between the guide groove of said protrusion and said cassette holder is prevented.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of a cassette mounting device according to the present invention.
9 is a side view showing an embodiment of the present invention, wherein 9 is a spout, 9a is an end, 9b is an opening, 9c and 9d are stoppers, and 10-1.
Reference numeral 2 denotes a pin, and the same reference numerals denote the same parts in FIG.

In FIG. 1, the A-link 2 and the B-link 3 are attached to the cassette holder 1 and the chassis 5 in the same manner as the conventional cassette mounting apparatus shown in FIG. 8, but the damper 8 shown in FIG. Not been. In this embodiment, a spring 9 is provided instead of the damper 8. Hereinafter, this point will be described.

On the side surface of the cassette holder 1, a plate-shaped spout 9 is rotatably mounted by means of a pin 10. The end 9a of the spout 9 is turned by pins 11 and 12. Has been blocked. Also, in this projectile body 9,
A groove-shaped opening 9b slightly shorter than the guide groove 1a is provided, and the opening 9b is provided along the guide groove 1a. A stopper 9c is provided at the left end of the opening 9b in the drawing, and the stopper 9c covers and hides the left side of the guide groove 1a of the cassette holder 1, that is, the vicinity of the stopper 1c shown by a broken line. ing. The right end of the opening 9b in the drawing also forms a stopper 9d, and the stopper 9d forms a ridgeline inclined downward and to the right in the drawing.

The state in which the projecting body 9 is in the cassette holder 1
When the pins 10, 1 are in the raised state.
It is almost in a natural state supported by 1,12.

On the other hand, when the cassette holder 1 is in the lowered state, the stopper 9d of the opening 9b is pressed by the pin 2a on the A-link 2 as shown in FIG. 9d, as described above,
The stopper 9d is lifted by the pressing of the pin 2a because it forms a ridge line that is lower right in the drawing, so that the sprung body 9 is elastically changed from the state of FIG. 1 shown by the broken line to the state shown by the solid line. Deform. By this elastic deformation, the sprung body 9 pushes the pin 2a of the A-link 2 to the lower left in the drawing along the guide groove 1a. However, in this case, since the cassette holder 1 is locked by a lock mechanism (not shown), the pin 2a cannot move.

Next, the operation of this embodiment having such a configuration will be described.

In FIG. 1, the state shown in FIG. 1 indicates that the cassette holder 1 has been raised, that is, after the cassette has been ejected or in a state of waiting for insertion of the cassette.
In this state, the biasing spring 7 pushes the pin 3b on the B-link 3 to the left in the drawing via the slider 6, and the torque for rotating the B-link 3 clockwise and the A-link 2 counterclockwise. A torque to be rotated is generated. As a result, the pin 2a on the A-link 2 presses the stopper 9c of the sprocket 9, but since the end 9a of the sprocket 9 is regulated by the pin 11, the spur 9 generates a reaction force. , The cassette holder 1 is fixed in the state shown in the figure.

When the cassette holder 1 is pushed downward in this state, the guide groove 1a on the cassette holder 1
The fulcrum 1b on the cassette holder 1 pushes the pin 2a on the cassette holder 1 downward, and the pin 3a on the B link 3 is pushed downward.
Link 2 is clockwise around pin 4 as a fulcrum,
Rotate about the pin 4 in the counterclockwise direction. At the same time, the pin 2a on the A-link 2 is
In the upper guide groove 1a, the pin 3b on the B-link 3
The guide holder 5 slides in the guide groove 5b on the sheet 5 to the right in the drawing, and the cassette holder 1 descends accordingly. Needless to say, in order to perform this lowering operation, the urging spring 7 must press the cassette holder 1 with a force that overcomes the load resistance applied to the pin 3b on the B link 3.

In the state shown in FIG. 2 in which the cassette holder 1 has completed the lowering operation and is held at a predetermined height by a suitable locking mechanism (not shown), the pin 2a on the A-link 2 is Is pressed to the right, but since the stopper 9d has the above-mentioned shape and the end 9a of the sprocket 9 is regulated by the pins 11 and 12, the sprocket 9 is elastically deformed as described above. The stopper 9d presses the pin 2a on the A-link 2 to the lower left in the drawing. This prevents the cassette holder 1 from rattling due to the gap between the guide groove 1a and the pin 2a.

In the state shown in FIG. 2, when the lock by the lock mechanism is released, the A-link 2 causes the pin 4 to be moved by the urging force of the urging spring 7 (FIG. 1) on the slider 6 and the pin 3b on the left side in the drawing. Counterclockwise as a fulcrum, B
The link 3 rotates clockwise about the pin 4 as a fulcrum,
At the same time, the pin 2a on the A link 2a slides in the guide groove 1a on the cassette holder 1, and the pin 3b on the B link 3 slides in the guide groove 5b on the chassis 5 to the left in the drawing. Then, the pins 2a and 3a lift the cassette holder 1.

Then, as shown in FIG. 1, before the pin 2a on the A-link 2 impacts against the stopper 1c on the cassette holder 1, it collides with the stopper 9c of the sprung body 9; Since the end 9a of the sprung body 9 is prevented from rotating by the pins 11 , 12 , the end 9a is elastically deformed, thereby reducing the impact of the collision. Therefore, when the pin 2a finally hits the stopper 1c on the cassette holder 1 as shown in FIG. 3, the contact does not become shocking and generates an unpleasant collision sound. Never. Then, as shown in FIG. 1, the cassette holder 1 stops at a position where the urging force of the urging spring 7 and the reaction force of the projecting body 9 are balanced.

FIGS. 4 and 5 show a second embodiment of the cassette mounting apparatus according to the present invention.
Numeral 14 denotes an arm and numeral 15 denotes a torsion spring, and portions corresponding to the above-mentioned drawings are denoted by the same reference numerals, and redundant description will be omitted.

4A and 4B show a state in which the cassette holder 1 is lowered and locked. FIG. 4A is a front view as viewed from the cassette insertion port side, and FIG. 4B is a side view similar to the above-mentioned drawing. FIG. 5A and 5B show a state in which the cassette holder 1 is raised and locked. FIG. 5A is a front view as viewed from the cassette insertion port side, and FIG. 5B is a side view similar to the above-mentioned drawing. It is.

4 (a) and 4 (b), this embodiment uses a torsion spring 15 having a curved shape in place of the projecting body 9 in FIG. The torsion spring 15 is attached to a support 13 fixed to the side of the cassette holder 1 on which the A-link 2 and the B-link 3 are provided. When the cassette holder 1 shown in FIG. It is positioned above the guide groove 1a of the holder 1. As is clear from FIG. 4B, one arm of the torsion spring 15 is fixed to the support 13 by the pin 16 and the other arm 14 is free.

5 (a) and 5 (b), the cassette holder 1 unlocked by the urging force of the urging spring 7 rises, and the pin 2a of the A-link 2 is positioned on the guide groove 1a of the cassette holder 1 in the drawing. Near the left end, torsion spring 1
5 is located near the left end of the guide groove 1a, and the pin 2a of the A-link 2 comes into contact with the arm 14 to twist the torsion spring 15. As a result, the torsion spring 15 increases the urging force on the pin 2a, and the pin 2a
Does not impact the stopper 1c of the guide groove 1a.

As shown in FIG. 5B, the torsion spring 15 is twisted counterclockwise by the pin 2a which is located above the pin 2a and moves to the left in the drawing.
The pin 2a is pushed to the lower right in the drawing by the torsion spring 15, so that the pin 2a is pressed against the lower side of the guide groove 1a, and the rattle of the cassette holder 1 is eliminated.

FIGS. 6 and 7 are side views showing a modification of the cassette mounting apparatus according to the present invention, wherein 2c is a mounting portion, 3c is an abutting portion, and 17 is a compression spring. The same reference numerals are given to the same parts, and the duplicate description will be omitted.

FIG. 6 shows a state in which the cassette holder 1 is lowered and locked, and FIG.
Indicates a locked state.

In FIG. 6, this embodiment uses a compression spring 17 in place of the projection 9 in FIG.
The compression spring 17 is attached to the attachment portion 2c of the A-link 2. When the cassette holder 1 is in a lowered state, the compression spring 17 is separated from the B-link 3.

When the lock is released from this state and the cassette holder 1 is raised, as shown in FIG. 7, the other end of the compression spring 17 is brought into contact with the contact portion 3 formed on the B link 3.
Contact c. Then, as the cassette holder 1 further rises, the compression spring 17 is compressed by being sandwiched between the A link 2 and the B link 3. For this reason, the reaction force of the compression spring 17 that gradually increases is applied to the A-link 2 and the B-link 3, so that the pin 2a does not hit the stopper 1c of the guide groove 1a.

Further, the compression spring 15 is provided in the cassette holder 1.
7, the pin 2a is pushed rightward in the drawing, as is apparent from FIG.
No rattling occurs in the cassette holder 1.

[0039]

As described above, according to the present invention,
It is possible to prevent the generation of unpleasant metal noise due to the impact when the cassette holder is completely lifted, and also to prevent the cassette holder from rattling when the cassette holder is lowered by a simple and inexpensive means of a buffer member. Can be.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of a cassette mounting device according to the present invention, showing a state after a cassette is ejected or a cassette is waiting to be inserted.

FIG. 2 is a side view showing a state where the cassette holder of the first embodiment shown in FIG. 1 is lowered.

FIG. 3 is a view showing a deformed state of a shock absorbing sprung body when the cassette holder of the first embodiment shown in FIG. 1 is raised.

FIG. 4 is a view showing a state where a cassette holder of the second embodiment of the cassette mounting apparatus according to the present invention is lowered.

FIG. 5 is a diagram showing a state after a cassette is ejected or a cassette is waiting to be inserted according to the second embodiment shown in FIG. 4;

FIG. 6 is a view showing a state where a cassette holder of a modified example from the cassette mounting device according to the present invention is lowered.

7 is a diagram showing a state of the cassette mounting device shown in FIG. 6 after a cassette is ejected or a cassette is inserted.

FIG. 8 is a side view showing a state after a cassette is ejected or a cassette is waiting to be inserted by the conventional cassette mounting apparatus.

9 is a side view showing a state where a cassette holder of the conventional cassette mounting device shown in FIG. 8 is lowered.

[Explanation of symbols]

 Reference Signs List 1 cassette holder 1a guide groove 1b fulcrum 1c stopper part 2 A link 2a, 2b pin 2c mounting part 3 B link 3a, 3b pin 3c contact part 4 pin 5 chassis 5a fulcrum 5b guide groove 6 slider 7 biasing spring 9 Spring body 9a End 9b Opening 9c, 9d Stopper 10, 11, 12 Pin 13 Support 14 Arm 15 Torsion spring 16 Pin 17 Compression spring

Claims (4)

(57) [Claims] A link mechanism having a rotatable link;
A movable cassette holder is connected to the cassette holder.
When the link rotates, it is implanted at one end of the link.
The protrusion slides along a guide groove provided in the cassette holder.
The cassette holder moves while moving, and the cassette holder moves.
To move the cassette placed in the
In the cassette mounting device described above, the cassette mounted on the cassette holder is placed in the predetermined position.
Buffer member with which the projection abuts before completing the movement up to
And the cassette mounted on the cassette holder is positioned at the predetermined position.
A cassette mounting device configured to be able to absorb an impact when the movement to the loading position is completed. 2. The apparatus according to claim 1, wherein the movement of the cassette holder is performed before the rotating link.
The cassette is removed by sliding the projection along the guide groove.
A cassette mounting device characterized in that it is a rising motion for pulling out . 3. The apparatus according to claim 1, wherein the movement of the cassette holder is performed before the rotating link.
The cassette is loaded by sliding the projection along the guide groove.
It is a downward movement for wearing, and the buffer member
By pressing, the backlash of the convex portion in the guide groove
Cassette mounting device, characterized in that the cassette mounting device prevents 4. The cassette according to claim 1, wherein said cushioning member is an elastic body.
Mounting device.