JPS6029083Y2 - Cassette loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a cassette loading device for a magnetic recording/reproducing device, so-called a video tape recorder (hereinafter referred to as VTR), and particularly relates to an improvement of a locking mechanism.

Generally, in a VTR, magnetic tape for recording and reproducing is stored in a cassette, and when used, it is stored in a cassette holder that is detachably supported by a lift mechanism on the VTR main body.

When the cassette holder containing the cassette is pressed against the VTR main body, the cassette holder is pushed down to the cassette mounting portion of the VTR main body while being supported by the lift mechanism, and is locked by the locking mechanism.

When the cassette is inserted into the cassette mounting portion of the VTR body, the cassette tape is automatically pulled out from within the cassette, allowing operations such as recording and playback.

On the other hand, when the eject operation is performed after recording or playback, the cassette tape is automatically stored in the cassette.
The cassette holder is unlocked by the lock mechanism and lifted above the VTR main body by the lift mechanism, so that the cassette can be taken out from the cassette storage body.

In such a VTR, the locking mechanism generally includes a locker 11 as shown in FIG. 1, for example.

This locker 11 is located inside the VTR body with an arrow (A++B) shown in the figure.
), and is normally biased in the direction of arrow A in the figure by the tension of the spring 12, but is kept in an upright position as shown in the figure by a positioning mechanism (not shown).

Therefore, when the cassette holder is pushed down from the cassette mounting part of the VTR main body, the rocker is pressed by the locking part 13 provided on the cassette holder and rotates in the direction of arrow B in the figure against the tension of the spring 12. .

When the locking portion 13 reaches the engaging portion 111 position, the tension of the spring 12 causes the locking portion 13 to return in the direction of arrow A in the drawing, and the engaging portion 111 and the locking portion 13 engage with each other.

Further, in order to prevent the cassette from being displaced due to vibrations, shocks, etc., a cassette holding member made of an elastic member such as a leaf spring is generally provided within the cassette holder.

To explain this using FIG. 2, first, as shown in FIG.

When the cassette holder 17 is pushed down from this state, the pedestal 20, 20, which is provided in the cassette mounting section inside the VTR main body, for example, is inserted into the cassette holder 17 through the through holes 19, 19 provided on the lower surface of the cassette holder 17. supports only the cassette 16 by coming into contact with the lower surface of the cassette 16.

On the other hand, the cassette holder 17 further rises slightly downward and is locked by the locking mechanism as explained in FIG.

Therefore, as shown in the figure, the cassette holding member 18.18 comes into contact with the upper surface of the cassette 16 and presses the cassette 16 toward the support stand 20.20, thereby ensuring that the cassette 16 is mounted securely.

From the above explanation, when a user attaches a cassette to a VTR main body, a force is required to push down the cassette holder 17 in opposition to the force of the lift mechanism supporting the cassette holder 17 that pushes the cassette holder 17 up. .

Further, when the cassette holder 17 is pushed down a predetermined distance, a force is required to push the rocker 11 away, that is, to rotate it.

Furthermore, just before the cassette holder 17 is locked to the locker 11 (from when the cassette holding member 18.18 comes into contact with the cassette 16 until the cassette holder 17 is locked by the locker 11), the cassette holding member 18.18 is locked. Since it receives an upward force due to elastic force, a force to counter this force is also required.

In particular, the force due to the elastic force of the cassette holding member 18.18 is large, approximately 500 (gw) to 1000 (gw), and is a force that acts rapidly.

For this reason, the following problems have occurred in conventional VTRs.

(2) If you release your hand without pressing the cassette holder 17 against the VTR body sufficiently, the cassette holder 17 will not be locked to the locker 11.

(2) In the case of (2), the cassette holder 17 is held in a partially locked state, and the lock is suddenly released due to vibration, impact, etc., and the cassette holder 17 floats upward, damaging the cassette tape.

(2) Immediately before the cassette holder 17 is locked by the rocker 11, the user must apply a large amount of force, which does not provide a good operational feel when mounting the cassette.

■Furthermore, just before the cassette holder 17 is locked by the locker 11, the user may be aware that it will not lock unless a sufficiently large force is applied to it. This is undesirable in terms of durability and reliability of the cassette loading device.

This idea was made to deal with the above-mentioned situation, and it does not require a lot of force when attaching a cassette to the cassette attachment part of the VTR body, and it also ensures that the cassette holder is locked into the locking mechanism, preventing malfunctions. It is an object of the present invention to provide a cassette mounting device that does not cause this problem.

Hereinafter, embodiments of this invention will be described in detail with reference to the drawings.

FIG. 3 shows an embodiment of this invention, which is a box-shaped cassette holder.

A cassette insertion opening 3 is provided on one side of the cassette holder 31.
2 is provided, and a cassette 37 can be freely inserted and removed.

This cassette holder 31 is attached to side walls 33 and 34 in the longitudinal direction of the cassette insertion opening 32, that is, in the direction of arrows (C+-+D) in the figure.
One end of lifters 38 and 39 constituting the lift mechanism is rotatably supported in the direction of the arrow (E++F) shown in the figure.

The other ends of the lifters 38 and 39 are rotatably supported inside the VTR main body.

The other end of the lifter 38 also extends downward, and a spring 41 is tensioned at the extending end, so that a rotational force in the direction of arrow G in the figure is always applied.

Further, a tongue piece 35 is provided on the lower end portion of the side wall 33, facing downward, and a pin 36 serving as a locking portion is provided on the tongue piece 35, projecting in the direction indicated by the arrow.

Reference numeral 42 denotes a rocker as an engaging member constituting a locking mechanism provided inside the VTR main body.This rocker 42 has a claw 43 at one end, and an arrow (I) at the other end.
It is rotatably supported in the ++J) direction.

Further, the rocker 4 is biased in the downward direction of the arrow shown in the figure by the tension of an elastic member such as a spring 44.

Normally, a positioning member (not shown) restricts the rotation in the direction of the arrow 1 shown in the drawing due to the tension of the spring 44 in the substantially upright state as shown in the drawing.

In such a configuration, the rotation locus of the rocker 42 is substantially parallel to the rotation locus of the side wall 33, and the claw 43 of the rocker 42 is on the rotation locus of the pin 36.

Here, the shape of the rocker 42, which is a feature of this invention, will be explained in more detail with reference to FIG.

The claw 43 of the rocker 42 has a first inclined portion 431 that gradually slopes from the upper end toward the lower end toward the cassette insertion port 32 side of the cassette holder 31.

The pawl 43 also has a second sloped portion 43° that gradually slopes toward the lower end from the sloped terminal end of the first sloped portion 431 in the direction away from the cassette insertion port 32 .

Furthermore, the claw 43 has an engaging portion 433 formed in a gently curved shape in a direction away from the cassette insertion port 32 from the inclined end of the second inclined portion 43°.

Although not shown in the above configuration, the cassette holding member and the receiver described in the second section are provided with the same function as the stand.

The operation in the above configuration will be explained.

First, the lid 38 pushes the cassette holder 31 containing the cassette 37 downward and rotates in the direction of arrow H in the figure against the tension of the spring 41, and together with the lifter 39, the cassette holder 31 is moved into the cabinet of the VTR body. The cassette is moved to the cassette mounting part through the opened gusset mounting part opening.

During the rotation, the pin 36 comes into contact with the upper end of the first inclined portion 431 of the pawl 43, presses the pawl 43 against the tension of the spring 44, and rotates the pawl 43 in the direction of the arrow J shown in the figure.

Therefore, the pin 36 moves downward along the first inclined portion 431 and comes into contact with the second inclined portion 43°.

When the pin 36 reaches the second inclined portion 43°, the rocker 43 is rotated in the direction of the arrow 1 shown in the figure by the tension of the spring 44.

At this time, the pin 36 is activated by the spring 4 that biases the rocker 42.
Due to the rotational force of the rocker 42 due to
5, receives a downward component force P as shown in FIG.

In this way, the pin 36 moves downward along the second inclined portion 43°, and finally reaches and is engaged with the retaining portion 433, completing the locking of the cassette holder 31 by the rocker 42, and the cassette This means that the cassette No. 37 has been loaded into the cassette loading section.

Then, the cassette tape is automatically pulled out from the cassette 37 and wound around a cylinder provided with a rotating head to prepare for recording, playback, etc.

On the other hand, when the eject operation is performed, the rocker 42 is rotated in the direction of arrow J in the figure by its control device (not shown), so that the engagement between the pin 36 and the engaging portion 433 is ensured.

For this reason, the lifter 38 is biased by the tension of the spring 41 and rotates in the direction of arrow G in the figure, thereby pushing up the cassette holder 31 together with the lifter 39 above the VTR main body.

Then, when the eject operation mode is released, the rotational force of the rocker (2) in the direction of the arrow J shown in the figure by the control device is released, and the rocker (2) returns to the state shown in the figure.

This embodiment described in detail above has the following effects.

First, when the pin 36 of the cassette holding weight reaches the second inclined portion 43□ of the claw 43, the pin 36 receives a downward force from the rocker 42, that is, a pulling force.

Therefore, if the dimensions are set such that the pin 36 reaches the second inclined portion 43° before the cassette holding member provided on the cassette holder 31 comes into contact with the cassette 37, the elastic force of the cassette holding member When the holder 31 receives an upward force, the cassette holder 11
This means that they are being subjected to a pulling force.

Therefore, when the cassette holder 11 is pressed upward by the cassette holding member, that is, when the cassette holder 31
There is no need to press the cassette holder 31 against the main body side with a large force immediately before the cassette holder 31 is locked by the locker 42, and the cassette holder 31 is reliably locked by the locker 42.

Therefore, the weight of holding the cassette as in the conventional case is reduced by the rocker 42.
This eliminates problems such as the cassette not being locked properly or being locked halfway, resulting in malfunctions, and also improves the operational feel when the cassette is installed.

Furthermore, some users may not be aware that the cassette holding weight will not be locked unless a large force is applied at the end of the cassette loading operation, so they may apply an unnecessarily large force to the cassette holder 31 or handle it in a shocking manner. This eliminates this problem, improving the durability and reliability of the cassette loading device.

In addition, the inclination angle of the second inclined portion 43□ and the spring 44
If the tension etc. of the pin 36 are set appropriately, the pin 36 is
When the position □ is reached, the cassette holder 31 can be automatically locked to the locker 42 without the user having to press the cassette holding body weight.

It should be noted that this invention is not limited to the previous embodiment and can be implemented in other ways.

For example, the lift mechanism may not be one that rotates as in the previous embodiment, but may be one that moves linearly.

Further, the structure may be such that the rotation locus of the rocker is perpendicular to the movement locus of the cassette holder.

Furthermore, it goes without saying that the cassette holding member and the cassette holder may be implemented in a cassette mounting device without a stand.

As described above, this invention provides a cassette mounting device that does not require a large force when mounting a cassette, has excellent operability, and also securely locks the cassette holder, which is advantageous in terms of durability and reliability. be able to.

[Brief explanation of drawings]

Fig. 1 is a side view showing a conventional example of a locker constituting a locking mechanism for a cassette holder, Figs. 2a and b are views for explaining a cassette holding member provided on the cassette holder, and Fig. A schematic perspective view showing an embodiment of the cassette loading device according to the invention, FIG. 4 is a side view for explaining the characteristic portion of FIG. 3, and FIG. 5 is an operation of the characteristic portion of FIG. 3. FIG. 11... Cassette holder, 32... Song cassette insertion slot, 36... Pin, 37... Cassette, 38° 39... Lifter, 42...・・・・・・
・Rocker, 43...Claw, 431...First slope, 43□...Second slope, 433
...Engagement part, 44...Spring.

Claims (1)

[Scope of utility model registration request] A cassette holder into which a cassette can be inserted and removed through a cassette insertion hole formed on one side, a locking part provided on the cassette holder, and a cassette holder that can be inserted into the cabinet of the magnetic recording/reproducing device. a lift mechanism that is removably moved to a cassette mounting section provided inside the magnetic recording/reproducing apparatus through an opened cassette mounting section opening; The part is formed with an engaging part that engages with the locking part, and is constantly biased by an elastic member so that the engaging part is positioned on the movement locus of the locking part. A first inclined part is formed so as to be rotated in a direction opposite to the biasing direction by the elastic member when the first inclined part comes into contact with and is pressed by the locking part. a locking mechanism having a retaining member formed with a second inclined portion so that the urging force of the elastic member applies a force in a direction substantially equal to the direction of movement when the cassette is attached to the locking portion until the mating portion; cassette loading device.