JPS61240470A - Loading and unloading mechanism for cassette - Google Patents

Abstract

PURPOSE:To forcibly pull out of a cassette halfway of intake by conducting the power transmission between a driving member and a cassette-transporting- operation member for the loading and loading of a cassette through a spring. CONSTITUTION:When the cassette 1 is pushed in, a rocking link 26 is turned through a sliding member 27 counterclockwise, and the spring 30 bends. The driving member 21 is rotated clockwise by the driving force from the source of driving power, of which torque is transmitted to the rocking link 26 via the spring 30, and the link turns counterclockwise, then, the sliding member 27 moves in the direction of arrow to take in the cassette 1 to the specified position. If forced pulling out is operated halfway the driving member remains as it is rotated clockwise, but the link 26 turns clockwise resisting against the force of the spring 30.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cassette loading/unloading mechanism for loading and unloading a cassette using a driving force from a driving source, and particularly to cassette players and VTRs.

This invention relates to a cassette mounting/ejection mechanism used in DAT.

[Prior Art] FIG. 2 shows a conventional cassette loading/unloading mechanism. The cassette loading/unloading mechanism is for loading and unloading the cassette 1.

This cassette loading and ejecting mechanism includes a driving member 2 and a cassette moving operation member 3. The drive member 2 is provided so as to be able to swing around a shaft 4 by a drive force from a drive source. A pin 5 is provided upright at the tip of the drive member 2, as shown in the figure.

The cassette moving operation member 3 includes a swing link 7 provided to be rotatable about a shaft 6, and a slide member 8 capable of engaging with the inserted cassette 1. One end of the swing link 7 is shaped to protrude laterally as shown, and this protruding portion can come into contact with the pin 5 of the drive member 2. Further, a bent portion 7a, that is, a bent portion 7a is formed in this end portion. As shown, a spring 9 in the form of a torsion spring is arranged around the shaft 6. The spring 9 is configured such that one end thereof comes into contact with the bent and raised portion 7a of the swing link 7, and the other end comes into contact with the pin 5 of the drive member 2. And swing link 7
is always urged to rotate clockwise in the figure. This rotation is caused by the abutment between the laterally protruding portion of the swing link 7 and the pin 5 of the drive member 2.
Its termination is defined.

The slide member 8 is provided so as to be movable in the horizontal direction when the capstan shaft is used as a vertical reference. That is, it is provided so as to be able to slide in the direction indicated by arrow A in the figure.

Further, as shown in the figure, one end of the slide member 8 is engaged with the cassette 1. And at the other end,
A pin 11 is provided. Correspondingly, a long hole 10 is formed at the other end of the swing link 7. The pin 11 of the slide member 8 is positioned within this elongated hole 10. In this way, the swing link 7 and the slide member 8
are connected by engagement between the pin 11 and the elongated hole 10. Therefore, when the swing link 7 rotates about the shaft 6, the slide member 8 slides in the direction shown by arrow A together with the cassette 1.

Next, the operation of the conventional cassette loading/unloading mechanism having the above-described configuration will be explained.

In order to install the cassette 1 in a predetermined position, the cassette 1 is first pushed in by hand. Then, the swing link 7 rotates counterclockwise via the slide member 8 against the force of the spring 9. At that time, the drive member 2 has not yet moved. Thereafter, the drive member 2 is rotated clockwise by the force from the drive source. Then, the pin 5 of the drive member 2 comes into contact with the laterally protruding portion of the swing link 7 and presses it. As a result, the swing link 7 rotates counterclockwise, and the slide member 8 accordingly slides together with the cassette 1 in the horizontal direction, that is, in the direction indicated by arrow A in the figure. The horizontal movement is thus completed.

When ejecting the cassette 1, the drive member 2 first
Rotate counterclockwise in the figure. Then, the swing link 7 rotates clockwise by the action of the spring 9 so as to follow the pin 5 of the drive member 2. In response, the slide member 8 slides together with the cassette 1 in the direction indicated by arrow B in FIG. 2, and the cassette 1 is ejected.

[Problems to be Solved by the Invention] The above-described cassette mounting/ejection mechanism has the following problems. For example, when cassette 1 enters automatic suction operation and you want to replace it with a different cassette, or when you have pulled a defective cassette halfway through due to thermal deformation and the operation stops midway, you can pull out that cassette. If so, the connection portion between the cassette 1 and the slide member 8, the connection portion between the slide member 8 and the swing link 7, and the connection portion between the horizontally protruding portion of the swing link 7 and the drive member 2. Unreasonable force is generated. Therefore, any one of the cassette 1, the slide member 8, the swing link 7, and the drive member 2 will be damaged.

Further, when the cassette 1 is caused to perform a suction operation, the suction stroke is determined by the amount of movement of the drive member 2 in the structure shown in FIG. but,
Generally, there are many structures that increase the suction stroke, and therefore it has become difficult to accurately determine the suction end position based on the amount of movement of the drive member 2.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cassette loading/unloading mechanism that allows the cassette to be pulled out even during suction of the cassette, and that allows the suction stroke of the cassette to be easily determined.

Means for Solving Problem L] The cassette loading/unloading mechanism according to the present invention includes a drive member driven by a drive source, a cassette moving operation member, and a spring. The cassette movement operating member is displaceably provided and engages with the inserted cassette to move the cassette. The spring connects the drive member and the cassette movement operation member. Power is transmitted between the drive member and the cassette moving member during loading and unloading of the cassette through the spring.

[Function] When the cassette is pulled out during suction, the cassette moving operation member rotates against the force of the spring. At this time, the drive member remains stationary. Furthermore, even after the cassette reaches the predetermined suction end position, the cassette movement operating member and the driving member are connected via the spring, so that
Opus l-0-reflection of the driving member becomes possible.

[Embodiment] FIG. 1 shows an embodiment of the present invention. The illustrated cassette loading/unloading mechanism 20 includes a drive member 21
and a cassette moving operation member 22. Drive member 2
1 is configured to be able to swing around a shaft 23 by a driving force from a driving source. A pin 24 is provided at the tip of the drive member 21.

The cassette moving operation member 22 includes a swing link 26 provided to be able to rotate about a shaft 25, and a cassette 1
and a slide member 27 adapted to be engaged with the slide member 27.

A pin 28 is provided at one end of the swing link 26, and a long hole 29 is formed at the other end.

Also, as shown, a spring 30 in the form of a torsion spring is disposed around the shaft 25. This spring 3o connects the drive member 21 and the swing link 26. Specifically, the spring 30 has two legs, which connect the pins 24 and 28.
I'm trying to stay in the dark. Therefore, the spring 30 biases the pins 24 and 28 toward each other.

The slide member 27 is provided so as to be movable in the horizontal direction when the capstan shaft is used as a vertical reference. That is,
It is movable in the direction indicated by arrow A in FIG. One end of the slide member 27 engages with the cassette 1, and a pin 31 is provided at the other end. This pin 31 is positioned within the elongated hole 29 of the swing link 26. In this way, the swing link 26 and the slide member 27 are connected by the engagement between the pin 31 and the elongated hole 29.

Next, the operation of the cassette loading/unloading mechanism 20 shown in FIG. 1 will be explained.

When the cassette is attached, when the cassette 1 is first pushed in by hand, the swing link 26 rotates counterclockwise in the figure via the slide member 27. At this time, the drive member 21 remains stationary. Therefore, the spring 30 is bent by the rotation of the swing link 26. Thereafter, the driving member 21 is rotated clockwise in the figure by the driving force from the driving source. Then, the rotational force of the drive member 21 is transmitted to the swing link 26 via the spring 30,
Rotate the swing link 26 counterclockwise.

Accordingly, the slide member 27 moves together with the cassette 1 in the horizontal direction, that is, in the direction indicated by arrow A in the figure. In this way, the cassette 1 is pulled into a predetermined position.

If the cassette 1 is forcibly pulled out during the above operation, the drive member 21 remains stationary and the swing link 26 rotates clockwise in the figure against the force of the spring 30. Therefore, if the strength of each component is set to be higher than the peak strength of the spring 30, each component will not be damaged.

When ejecting the cassette, the drive member 21 rotates counterclockwise in the figure. This rotational force is transmitted to the swing link 26 via the spring 30. Therefore, the swing link 26 rotates clockwise in the figure, and the slide member 27 moves in the direction indicated by arrow B together with the cassette 1 accordingly. In this way, the cassette 1 is ejected.

[Effects of the Invention] As described above, according to the present invention, power is transmitted between the drive member and the cassette movement operating member during loading and unloading of the cassette through the spring. Therefore, it becomes possible to forcibly pull out the cassette while it is being sucked in. In this case, there will be no damage to the component parts.

Furthermore, since the drive member is configured to be able to overstroke, it is also possible to determine the suction end position of the cassette, for example, by the slide member 27 in the previously described embodiment or by the cassette 1. Therefore, the cassette suction end position can be accurately set.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention. FIG. 2 is a diagram showing a conventional cassette loading/unloading mechanism. In the figure, 20 is a cassette mounting/ejection mechanism, 21 is a drive member, 22 is a cassette movement operation member, 26 is a swing link, 27 is a slide member, 29 is a long hole, 30 is a spring,
31 indicates a pin.

Claims (2)

[Claims] (1) In a cassette loading/unloading mechanism that loads and unloads a cassette using a driving force from a driving source, a driving member driven by the driving source is displaceably provided and engages with the inserted cassette. a cassette moving operating member for moving the cassette; and a spring connecting the driving member and the cassette moving operating member, the drive member and the cassette moving operating member being connected during loading and ejecting the cassette. A cassette mounting/ejection mechanism, wherein power transmission between the cassettes and the cassettes is performed via the spring. (2) The cassette movement operating member includes a swing link that is rotatably provided and connected to the drive member via the spring, and a swing link that is movable in the horizontal direction when the capstan shaft is used as a vertical reference. a slide member provided and adapted to engage with a cassette to be inserted, the swing link and the slide member being connected by engagement with a pin and an elongated hole. A cassette loading and ejecting mechanism featuring: