JPS6023807Y2 - Cassette loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a cassette loading device for a video tape recorder, and particularly to its locking mechanism.

In a video tape recorder, magnetic tape for recording and reproduction is stored in a cassette, and when used, it is loaded into a cassette holder of the tape recorder main body.

The cassette holder is generally in the shape of a thin box with an opening in the side wall, and when a cassette is loaded into it and pressed against the main body, the cassette holder sinks into the recess of the main body by a lift mechanism and is locked by a locking mechanism. It is supposed to be done.

When recording or playback is finished, by performing an eject operation, the cassette holder is unlocked and floats up, allowing the cassette to be removed.

However, according to the conventional locking mechanism, a large force is required when ejecting the cassette holder, and accidents occur in which the cassette holder gets caught and becomes unable to float.There is a need for a means to solve this problem.

This idea was made in view of the above circumstances, and it exerts a relatively strong locking force when the cassette holder is locked, maintains a secure locking state even when the lock is completed, and has a relatively strong locking force when the cassette holder is unlocked. Weak 1. ＞
(=rThe object is to provide a cassette mounting device equipped with a locking mechanism that can be operated by removing rack force.

Examples of this invention will be described below with reference to the drawings.

That is, in FIG. 1, reference numeral 11 denotes a substantially thin box-shaped cassette holder having openings in its front and rear walls, and one end of support arms 12 and 13 are rotatably attached to a portion of both side walls of the cassette holder. ing.

The support arms 12, 13 extend along the side wall toward the lower front of the cassette holder 11, and both arms are rotatably supported on the fixed shaft 14.

Therefore, the cassette holder 11 can be raised and lowered by rotating the support arms 12.13 together in the direction of the arrow (A<-B) shown in the figure about the fixed shaft 14.

On the other hand, the fixed shaft 14 is attached to one of the rotating ends of the support arm 12, that is, the rotating end on the cassette holder 11 side.
A pin-shaped pin-shaped member 15 is provided which protrudes in the same direction as the pin.

Further, one end of an elastic body 16 is locked to the other rotating end of the support arm 12, so as to apply a biasing force to the support arm 12 in the direction of arrow A in the figure.

When the cassette holder 11 supported in this manner is pressed in the direction of arrow C and moved to a predetermined position, the engaging body 18 acts on the engaged element 15 .

The engaging body 18 is rotatably provided on a fixed shaft 19, and the direction of the rotating shaft is, for example, the same direction as the fixed shaft 14.

This engaging body 18 includes an engaging element 183 and a biasing element 182 extending from a bearing portion 181 in two directions having a rotation angle θ.
The engaging element 183 extends substantially close to the movement trajectory of the engaged element 15, and the biasing element 182 moves along the slide member 21 that moves in conjunction with the eject operating device. It has been extended near.

In this case, the arrangement position of the slide member 21 can be set in the middle of the rotation of the tip of the biasing element 182, and it is also possible to prevent the biasing element 182 from rotating in the direction of arrow E in the figure. It is.

On the other hand, the engaging member 183 has a locking portion 180 whose tip portion is formed into a claw shape, and can be locked to the engaged body 15 .

Further, a relatively weak elastic member 22 that applies a biasing force in the direction of arrow F in the figure is applied to the engager 18 .

Furthermore, a wire-shaped release member 23 can act in the reverse direction of rotation in the direction of arrow F in the figure.
One end of the release member 23 is attached to, for example, a part of the engager 183 of the engager 18.

One embodiment of this invention is constructed as described above, and its operation will be explained next.

First, in this video tape recorder, when the cassette holder 11 is moving in the direction of the arrow shown in the figure and is in a raised state, the engaging body 18, slide member 21, etc. are in the state shown in FIG.

Next, when a cassette tape is loaded into the cassette holder 11 and the cassette holder 11 is pressed in the direction of arrow C in the figure, the support arms 12, 13, etc.
6 in the direction of arrow B in the figure.

During this rotation, the engaged body 15 comes into contact with the inclined portion of the engaging body locking portion of the engaging body 18, as shown in FIG.

As a result, the engaging body 18 rotates in the direction of arrow E in the figure.

In this operation, the engaging body 18 rotates against the elastic body 22, but an extremely strong elastic force is generated by the contact of the biasing element 182 against the flat surface of the slide member 21, which is stronger than the elastic force caused by this. It acts as an acting force, and the engaged body 1
5 is fitted into the locking portion 180, a strong force acts on the engaging body 18 in the direction of the arrow F shown in the figure.

Therefore, when the engaged body 15 is locked into the locking portion 180, it can be reliably locked into the locking portion with a strong force.

On the other hand, when the engaging body 18 and the engaged body 15 which are in the locked state are to be brought into the released state, an eject operation of the video tape recorder is performed.

In this operation, the slide member 21 is set to slide in the direction of arrow G shown in FIG. 1 in conjunction with the eject device.

Various means can be used to slide the slide member 21 in the direction of the arrow (G++H) shown in the figure, and for example, it can be carried out in conjunction with an eject button.

When the eject operation is performed, the slide member 21 escapes from the tip of the biasing element 182 of the engaging body 18, and as shown in FIG. 3, the elastic force applied to the engaging body 18 is set to be relatively weak. The force is generated only by the elastic material 22.

Therefore, when the release member 23 is pulled lightly, the engaging body 18
The engaged body 15 easily rotates in the direction of the arrow E shown in the figure.
The lock state of the engaging body 18 is released.

The support arm 12 can be rotated in the direction indicated by the arrow, and the cassette holder 11 can be raised.

Note that when the eject operation is completed, the pulling force is no longer applied to the release member 23, so the engaging body 18 returns to its original state due to the elastic force of the elastic body 22, returning to the state shown in FIG. The member 21 also returns below the biasing element 182.

Next, when pulling the release member 23 during the lock release operation, the slide member 21 must have already escaped from the lower end of the biaser 182 in the rotational direction. An example of how to obtain this timing is shown in FIG. explain.

That is, as shown in FIG. 4a, when the slide member 21 is operated and moved in the direction of arrow G in the figure by the eject operation and escapes from the lower end of the biaser 182, the release member drive pin 211 is attached to the slide member 21. is provided, which collides with the release arm 30.

This release arm 30 is connected to the fixed shaft 31 by the arrow shown in the figure (
J+-+K) direction, and is normally biased in the direction of the arrow shown by a coil spring (not shown).

Additionally, a release member 2 is provided at the rotating portion of the release arm 30.
One end of 3 is attached.

With the above configuration, it is possible to time the time when the slide member 21 escapes from the biasing element 182 of the engagement body 18 and the time when the release member 23 starts to pull the engagement body 18 in the direction of arrow E in the figure.

On the other hand, during the locking operation, since the slide member 21 does not move, it maintains a steady position as shown in FIG. 15, it rotates as shown by the broken line.

On the other hand, since the biasing element 182 is locked to the slide member 21 and prevented from rotating, it generates a repulsive force in the direction of arrow F in the figure, and a strong engaging force is exerted on the engaged body 15 when locked. .

As described above, according to this invention, a strong elastic holding force acts on the engaging body 18 in the middle of locking, and the engaged state can be reliably obtained, and at the time of release, the engaging body 18 can be held with an extremely weak force. It is something that can be unlocked.

This invention is not limited to the above embodiment, and the engaging body 35 may be a sliding type engaging body as shown in FIG.

That is, this engaging body 35 is supported by a support 37 so as to be movable in the direction of the arrow (1M) shown in the figure, and has an engaging element 351 on one extending end side and an engaging element 351 on the other extending end side. It has a biasing element formed by a coil spring 36.

Note that the same parts as in the previous embodiment are given the same reference numerals, and the description thereof will be omitted.

As explained above, this invention exerts a relatively strong locking force when the cassette holder is locked, and maintains a secure locking state even when the lock is completed.
It is possible to provide a cassette loading device that can be operated with a relatively weak unlocking force and has an easy-to-operate locking mechanism when shifting to unlocking.

[Brief explanation of the drawing]

Fig. 1 is a configuration explanatory diagram showing one embodiment of the cassette loading device of this invention, Figs. 2 and 3 are operation explanatory diagrams showing the operation of the main parts of this invention, and Figs. FIG. 5 is an explanatory view of the operation of an example of the unlocking means according to the invention, and FIG. 5 is an explanatory view of the configuration of another embodiment of the invention. 11...Cassette holder, 12,13...
...Support arm, 14...Fixed shaft, 15...
...Engaged element, 18...Engaging body, 182.
... Force element, 183... Engagement element, 21...
...Slide member, 23...Release member.

Claims (1)

[Scope of utility model registration request] A support arm whose one end is rotatably attached to both side walls of the cassette holder and whose other end is rotatably supported by a fixed shaft, and which is capable of raising and lowering the cassette holder; and the rotation of the support arm. an engaged element protrudingly provided on a part of the part, and an engaging element supported movably or rotatably in the first and second directions and capable of being held on the engaged element on one extending end side. At the same time, the other extending end side has a biasing means having an elastic force, and while the support arm is rotating to a predetermined position, the engaged element provided thereon is pressed against the tapered part of the engaging element. an engaging body capable of moving the biasing means in the second direction by contacting and pressing the body; provided so as to be movable between a first position where the means generates a repulsive force in the first direction and a second position where the biasing means is allowed to move;
a slide member that is moved to the second position by an eject operation in conjunction with an eject device; and as the slide member moves to the second position, the engager of the engagement body is driven in the second direction; A cassette mounting device characterized by comprising a release member for releasing the cassette.