JPH0834056B2 - Door device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is applied to all recording / reproducing apparatuses for recording / reproducing by introducing a recording medium into an apparatus, and after introducing the recording medium into the apparatus, The present invention relates to a door device that closes a recording medium insertion port.

[Conventional technology]

Conventionally, as a door device used in an information recording / reproducing apparatus, a structure including a single plate door as shown in FIG. 6 has been often used.

In FIG. 6, 1 is a frame made of synthetic resin,
The frame 1 has an opening 1a for inserting a medium. Again 21
Is a plate door made of metal or synthetic resin and rotatably supported by a support shaft 23, and 22 is a spring for urging the plate door 21 in a direction to close the opening 1a. When the recording medium is not loaded, the plate door 21 closes the opening 1a, and when the medium is inserted, the plate door 21 pushed by the medium in the D direction rotates in the E direction around the support shaft 23. After loading, the inside of the device was visible through the opening.

Due to this structure, it is impossible to prevent the entry of dust or foreign matter into the inside of the information recording / reproducing apparatus when the recording medium is mounted.

Therefore, it is desirable to have a mechanism in which the opening is closed regardless of whether the medium is mounted or not mounted. However, in order to do this with one door, the mechanism becomes complicated and is not suitable for downsizing the device. is there. There is also a problem that a sensor is required to confirm the presence / absence of a recording medium in the device.

To compensate for these drawbacks, a two-door mechanism as shown in FIG. 7 has been proposed. In FIG. 7, members which are the same as or considered to be the same as those in FIG.

In FIG. 7, reference numeral 24 denotes a shirt made of metal or the like, which is formed by a substantially U-shaped thin plate, and has engaging holes at both ends for engaging with engaging projections of a lever described later. The lever 25 has a substantially V shape, and an abutting portion 25a with which the recording medium abuts is formed at one end, and an engaging projection 25b with which the engaging hole 24a is engaged is formed at the other end, and a pin 26 is provided therebetween. It is attached to the frame body 1. That is, the lever 25 is swingably attached by the pin 26 while the shutter 24 is sandwiched between the lever 25 and the frame body 1. At this time, the engaging protrusion 25 of the lever 25
b is engaged with the engagement hole 24a of the shutter 24, and the lever 25 and the shutter 24 form a link mechanism, and the swinging motion of the lever 25 is converted into a linear reciprocating motion of the shutter 24. Further, the spring 27 is suspended between the locking holes 25c of the lever 25, and always urges the side of the lever 25 on which the engaging projection 25b is formed in the direction opposite to the insertion opening, that is, in the direction in which the shutter 24 is released. .

Next, the operation of the door device configured as described above will be described. First, the recording medium is inserted by pushing the plate door 21 open, and when it is introduced to the specified position, the recording medium descends substantially vertically to the turntable side (not shown). At this time, the rear end of the recording medium contacts the contact portion 25a, and the contact portion 25a is rotated downward (direction F in FIG. 7). As a result, the engagement projection 25b rotates upward (direction G in FIG. 7), and the shutter 24 slides upward (direction H in FIG. 7) along the inner surface of the frame 1 to open the medium insertion opening 1a. Completely closed. At this time, the plate door 21 contacts the upper surface of the recording medium and is in a half-opened state, and the shutter 24 is positioned between the plate door 21 and the frame body 1 to perform the above-described closing.

When the eject lever (not shown) is operated after the recording or the reproduction is finished, the contact portion 25a of the lever 25 is raised (the direction opposite to the direction F in FIG. 7) as the medium is raised, and the shutter 24 is lowered (the seventh position). (Anti-H direction). After that,
When the medium is discharged to the outside of the apparatus, the plate door 21 closes the opening 1a by the elastic force of the spring 22.

[Problems to be solved by the invention]

However, in the door device as shown in FIG. 7, the shutter 24 quickly and completely and vertically before the medium reaches the opening 1a by the force of the spring 27 released by the rise of the medium at the time of ejection. If it is necessary to lower the shutter 24, and this operation of the shutter 24 is delayed, the medium is surrounded by the shutters 24 left behind, causing ejection failure, or with the medium loaded, If the closed shutter 24 is accidentally strongly pressed, the door device may be damaged due to deformation or the like.

The present invention was devised in view of such drawbacks, without compromising the conventional advantages, with a simple configuration, reliable eject operation, high door strength at the time of loading a medium, thinning,
An object is to obtain a door device of an information reproducing device that can be miniaturized.

[Means for solving problems]

In order to achieve the above object, a door device of the present invention includes a frame body having a recording medium insertion opening, and a first door swingably supported on the side opposite to the recording medium insertion side of the frame body, The first
A second door swingably supported on both sides of the door of
The second door and the first door are provided with an urging means for urging the first door in the band closing direction.

[Action]

According to the above means, the second door 3 swingably supported on both side surfaces of the rotary first door 2 closes the opening for inserting the medium by the biasing means when the medium is not in operation. At the time of mounting, the curved door closes the opening by the biasing means.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 are for explaining an embodiment of the present invention, FIG. 1 is an exploded perspective view thereof, and FIGS. 2 to 5 are operation explanatory views.

In FIG. 1, reference numeral 1 denotes a frame body made of synthetic resin or the like having an opening 1a for inserting a medium.
Curved door support portions 1b and 1c described later are integrally formed, and the support portions 1b and 1c are provided with a support hole 1d and a notch 1e, respectively. Further, a stopper 1f for restricting the angle of rotation of the curved door is integrally formed at the end of the one supporting portion 1b. Reference numeral 2 denotes a curved door made of synthetic resin or the like having a curved surface portion 2a for closing the opening portion 1a, and both side surface portions 2b, 2c of the curved door 2 are provided with a shaft 2d engaging with the support hole 1d and the notch 1e. The curved door 2 is formed so as to be rotatable about the shaft 2d, and a support hole 2e for supporting a plate door described later is provided. Further, the one side surface portion 2c is integrally formed with a protruding portion 2f extending in the opposite direction to the curved surface portion 2a, and the protruding portion 2f has a notch 2g for locking a torsion spring described later. It is provided. Reference numeral 3 is a flat plate door, and a shaft 4 is fixedly mounted on an upper end portion 3a of the plate door. Both ends of the shaft 4 are engaged with the support holes 2e so that the plate door 3 can rotate about the shaft 4. Further, 5 is a torsion spring, both ends of which are bent as a locking portion 5a and an abutting portion 5b. This torsion spring 5 urges the curved door 2 and the plate door 3 in a direction to close the opening 1a by abutting on a part of the medium insertion port side.

 Next, the operation of the present invention will be described with reference to FIGS.

<At the time of loading> First, from the state shown in FIG.
When is pressed, the plate door 3 rotates in the direction A in FIG. 2 against the biasing force of the torsion spring 5. At the same time the shaft 4
Since both of them are pushed together, the curved door 2 rotates about the shaft 2d to a position where a part of the peripheral edge of the side surface portion 2b contacts the stopper 1f (see FIG. 3).

Further, in these drawings, reference numeral 11 denotes a sliding plate which is arranged in the apparatus as much as possible in the medium insertion and ejection directions.
Further, 12 is a holder, which holds the recording medium 10 and
Interlocking with the sliding movement of the sliding plate 11, the recording medium is introduced into the apparatus or discharged from the apparatus, lowered for locking to a turntable (not shown), or pulled up from the turntable. Work to do. Reference numeral 13 is a chassis that supports the frame body 1, the sliding plate 11, and the like. When the sliding plate 11 and the holding body 12 are pulled toward the arrangement side together with the recording medium 10 by the force of a spring or the like (not shown), the curved door 2 is prevented from closing the opening 1a by contacting the protruding portion 2f. The plate door 3 and the shaft 4 are blocked by the recording medium 10 in place of the sliding plate 11 that has been used, and serve as a stopper for the rotation of the curved door 2 in the B direction by the urging force of the torsion spring 5.
The medium insertion opening is not yet closed (see FIG. 4).

When the holding body 12 further descends and the recording medium 10 is fixed to a positioning pin (not shown), the curved door 2 is lowered by the difference in the rotational force acting on the locking portion 5a and the contact portion 5b of the torsion hole 5 as the medium 10 descends. It rotates in the direction B in FIG. 4 to a position where it completely closes the opening 1a (see FIG. 5).

<At the time of ejecting> Follow the procedure opposite to the above at the time of loading.

When the holding body 12 is lifted from the state shown in FIG.
Since the plate door 3 and the shaft 4 are pushed upward by the pressing force, and at the same time a rotational force acts on the curved door 2 in the direction C in FIG. 5, the curved door 2 rotates to a position where the opening 1a is fully opened (fourth position).
See figure).

By operating an eject lever (not shown), the sliding plate 11 and the holding body 12 move in the medium ejecting direction by the action of the spring, so that the recording medium 10 also moves in the ejecting direction (see FIG. 3). .

Then, the sliding plate 11 that has moved toward the exit side supports the protruding portion 2f of the curved door 2. Further, as the recording medium 10 is ejected, the plate door 3 closes the opening 1a by the force of the torsion spring 5 (see FIG. 2).

Incidentally, in the present invention, as a matter of course, the torsion spring 5 is divided into two or more springs and the curved door 2 and the plate door 3 are divided.
It is also possible to arrange them so that they are separately biased.

Further, when the curved door 2 closes the opening 1a, the curved door 2 is pressed against the frame 1 with a spring or the like, or packing is installed between the curved door 2 and the frame 1 to enhance the airtightness. You can also

In addition, the frame 1 can be integrated with the chassis 13 to greatly reduce the number of parts and facilitate the assembly.

Further, by changing the shapes and materials of the curved door and the plate door, it is possible to distinguish between the insertion and non-insertion of the medium. This can be made more reliable by changing the color and display.

〔The invention's effect〕

According to the present invention, a rotating first door, a swingable second door pivotally supported on both side surfaces of the first door, and an opening for medium insertion of the first door and the second door are closed. The configuration including the biasing means for biasing in the direction has the following effects.

(1) When the shaft, which is the center of rotation of the second door, is pushed up by the medium by the eject operation, the first door inevitably rotates in the direction in which the opening for medium insertion is opened, thus preventing defective ejection. Eject operation becomes reliable.

(2) Since no special parts are required under the opening of the frame,
The device can be made smaller and thinner.

Further, the space under the opening can be used as an installation space for the eject switch or the like.

(3) When the medium is loaded, the axis serving as the center of rotation of the first door is substantially on the same plane as the medium entrance path, so the strength of the first door can be secured.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIGS. 2 to 5 are operation explanatory diagrams of the embodiment, and FIGS. 6 and 7 are exploded perspective views of a conventional example. 1 ... Frame, 1a ... Opening, 1f ... Stopper, 2 ...
Curved door, 2d ... Shaft, 2e ... Support hole, 2f ... Projection part, 3 ... Plate door, 4 ... Shaft, 5 ... Torsion spring, 5a ...
... Locking part, 5b ... Contact part, 10 ... Recording medium, 11 ... Sliding plate, 12 ... Holding plate, 13 ... Chassis.

Claims (1)

[Claims] 1. A frame body having a recording medium insertion opening, a first door swingably supported on the side opposite to the recording medium insertion side of the frame body, and swingable on both side surfaces of the first door. A door device comprising: a movably supported second door; and a biasing means for constantly biasing the second door and the first door in a closing direction.