JPH0718033Y2 - Cassette loading mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a cassette loading mechanism applied to a recording / reproducing apparatus such as a VTR.

[Prior Art] In the cassette loading mechanism, when the cassette is fixed to the recording / reproducing position, the cassette is set at an accurate position,
Further, in order to apply the fixing load to be applied evenly with an accurate load, a locking device capable of performing reliable locking at an accurate position is required. As a means for satisfying this condition, there is a double lock mechanism having a lock mechanism on the left and right, and a means for interlocking the two lock mechanisms is required.

[Problems to be Solved by the Invention] A conventional device of this type has a structure in which both lock mechanisms are interlocked by transmission of a force in a twisting direction of a rod member that connects two lock mechanisms. Therefore, in order to ensure the operation, the transmission part is required to have a sufficient strength and a shape that reduces the torsional stress.
There is a drawback that a mechanism having a large weight and a large movable range is required.

Therefore, the present invention eliminates the above-mentioned drawbacks in the related art, and can provide a novel cassette loading mechanism capable of reducing the weight and the movable range and ensuring the locking and unlocking operations of the holder. is there.

[Means for Solving the Problems] The cassette loading mechanism of the present invention is movable between a first position for receiving a cassette and a second position for positioning the received cassette in a predetermined position, and both side portions are movable. A cassette holder 3 provided with protruding portions 12 at symmetrical positions respectively, and frames 1 and 2 arranged to face each other so as to support the holder,
A biasing member 14 for biasing the holder 3 toward the first position
And rotatably provided on each of the frames 1 and 2,
First and second locking members 18, 1 that engage and lock the protrusions 12 of the holder 3 in the second position, respectively.
9, a release member 15 for rotating the first lock member 18 in a release direction, and the first and second lock members 18, 19
A first rotating member 23 which is disposed substantially at a right angle with respect to and engages with an end portion of the first lock member 18 and rotates in conjunction with an unlocking operation of the first lock member 18. And levers 25, 26 for transmitting the turning force of the first rotating member 23, and the levers 25, 2 engaged with the end of the second lock member 19.
And a link mechanism having a second rotating member 23 that unlocks the second lock member 19 by rotating by the force transmitted from 6.

[Operation] When the lock by the first lock member is released in the above, the lock by the second lock member is simultaneously released by the link mechanism, and the holder moves from the second position to the first position.

[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a front view of the cassette loading device described in this embodiment as viewed from above, and is a view seen from the left side of the device in the cassette insertion direction, that is, FIG. Fig. 2 shows the view seen from the direction II-II,
Similarly, a view from the right side, that is, III shown in FIG.
A view seen from the −III direction is shown in FIG. 3, and a view seen from the front in the cassette insertion direction, that is, a view seen from the IV-IV direction shown in FIG. 1 is shown in FIG. Further, in order to omit the illustration, FIG. 2 shows a state in which a cassette is loaded, and FIG. 3 shows a state in which the cassette can be inserted and ejected.

In FIGS. 1 to 4, 1 and 2 are frames for supporting the entire mechanism, and 3 is a holder for moving the cassette, and a cassette (not shown) can be inserted in the direction of arrow I. 4, 5 and 6 are arms for moving the holder up and down, 7 is fixed to the arms 4 on both sides, a shaft for adjusting the phases of both arms 4, 8 is fixed to the arm 4, and to the arms 5 and 6. Pins that can rotate against each other, 9 are arms 5, 6 and frames 1, 2
The axis that connects with and rotates the arm 5,6, 10 is the arm 5,6
Pin 11 fixed to the roller, 11 is a roller supported by the pin 10 and adapted to rotatably engage with the slot of the holder 3, 12
Is a pin fixed to the arm 4, 13 is a roller that is supported by the pin 12, and is rotationally engaged with the slot of the frames 1 and 2, 14
Is a spring applied between the arms 5 and 6 and the frames 1 and 2 to urge the holder 3 upward. 15 is a lock release lever, 16 is a pin for connecting the lever 15 to the frame 1 and enabling rotation, 17 is a spring for returning the lever 15 to the original position,
18 and 19 are locking members for fixing the holder 3 to the lower position, 2
0 is a pin fixed to the lever 15 and transmits a force to the lock member 18, 21 is a pin for connecting the lock members 18 and 19 to the frames 1 and 2 to be rotatable, and 22 is a lock member 18 and 19 and the pin 12 Collar 23 for improving the slippage between them, 23 a cam for transmitting the movement of the locking member 18 to the locking member 19, 24 a pin for coupling the cam 23 to the frames 1 and 2 and enabling rotation, 25 and 26 are Link lever connecting the cams 23, 27 is the link lever 25, 26
Is a pin for fixing the cam 23 to be rotatable, 28 is a screw for adjusting the phase of the cam 23, and 29 is a return spring of the lock member 19. Here, the cam 23 and the link levers 25 and 26 form a link mechanism between the lock members 18 and 19.

Next, in the above configuration, when the release lever 15 is moved in the direction of arrow A in FIG. 2 from the cassette mounted state shown in FIG.
The pin 20 causes the lock member 18 to rotate in the direction of arrow B. As shown in FIG. 4, the rotation of the lock member 18 causes the cam 23 on the left side of the device to rotate in the B ₁ direction, and along with this rotation, the link levers 25 and 26 move in the B ₂ direction, and the cam on the right side of the device moves. 2
3 rotates in the B ₃ direction. This rotation causes the lock lever 19
Moves in the direction of arrow C. As described above, the release lever 15
The movement of the lock members 18 and 19 moves in the directions of the arrows B and C, respectively, and this movement releases the collar 22 from the locked state, thereby freeing the rollers 11 and 13. Then, the rollers 11, 13 are moved by the spring force of the spring 14, the holder 3 is moved upward, and the holder 3 is positioned at a cassette insertable / dischargeable position (not shown).

On the other hand, when the holder 3 is pushed down against the spring 14 from the ejected state shown in FIG. 3, the roller 13 slides in the slot 2a of the frame 2 and resists the return spring 29 on the way to lock the collar 22 with the lock member 19. By pushing the inclined surface 19a of the above, it gets over the claw portion 19b, and the return force of the return spring 29 causes the lock member 19 to return to the original position, so that the collar 22 is recessed to the back side of the claw portion 19b as shown by the one-dot chain line. Then you will be locked. In addition, on the opposite side of the device, the second
Similarly, in the figure, the collar 22 is the inclined surface 18 of the locking member 18.
By pressing a, the user can get over the claw portion 18b, and it will be recessed into the back side of the claw portion 18b and locked. These operations are also performed very smoothly because the lock members 18 and 19 are configured to interlock with each other by the cam 23 and the link levers 25 and 26. In this state, the holder 3 is in a state in which the cassette (not shown) is located at the recording / reproducing position.

[Effects] As described above in detail, according to the present invention, by the inexpensive means,
The weight and the movable range can be reduced, and the locking and unlocking of the holder can be surely performed. This is a great practical effect in such a cassette loading mechanism.

[Brief description of drawings]

1 is a plan view of an embodiment of the present invention, FIG. 2 is a view taken along line II-II in FIG. 1 in a cassette-loaded state, and FIG. 3 is a view taken along line III-III in FIG. 1 in an eject state. FIG. 4 is a view taken along line IV-IV in FIG. 1 in a cassette loaded state. 3 ... Cassette holder, 4, 5, 6 ... Arm, 13 ... Roller, 15 ... Lock release lever, 14, 17, 29 ... Spring, 18, 19 ... Lock member, 23 ... Cam, 25 , 26 …… Link lever.

Claims (1)

[Scope of utility model registration request] 1. A movable position between a first position for receiving a cassette and a second position for positioning the received cassette at a predetermined position, and protrusions 12 are provided at symmetrical positions on both sides. Cassette holder 3 and frames 1 and 2 arranged to face each other to support the holder
And a biasing member 14 for biasing the holder 3 toward the first position
And the first and second lock members 18, 19 which are rotatably provided on the frames 1 and 2, respectively, and which engage with and lock the protrusions 12 of the holder 3 at the second position.
A release member 15 for rotating the first lock member 18 in a release direction, and a first release member 15 disposed substantially at a right angle to the first and second lock members 18, 19. A first rotating member 23 that is engaged with an end portion of the first rotating member 18 and rotates in conjunction with an unlocking operation of the first locking member 18, and a lever that transmits a turning force of the first rotating member 23. 25, 26 and the second lock member 1
A link mechanism having a second rotation member 23 which is engaged with the end portion of 9 and is unlocked by the force transmitted from the levers 25 and 26 to unlock the second lock member 19. And a cassette loading mechanism including.