JPH0356946Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a shutter mechanism for a disc case insertion slot of a disc playback device.

Prior Art In Japanese Patent Application No. 55-14221, etc., the present applicant previously reported that by inserting a case containing a video disk all the way to the back and pulling it out, the disk was left inside. We proposed a video disc playback device that plays discs.

The disk case insertion opening on the front panel of this disk playback device is provided with a shutter mechanism that normally closes the opening and opens when the disk case is inserted.

4 and 5A, B, and C show conventional shutter mechanisms. 1 is a shutter, 2 is a shutter lever, and 3 is a shutter opening member.

The shutter 1 is rotatable around a shaft 4,
Usually, as shown in FIGS. 4 and 5A, it is located on the back side of the front panel 5, facing the disk case insertion opening 6, and blocking this.

When the player is turned on to play a disc, the shutter lever 2 rotates in the direction of arrow A as the carrier moves, and the shutter opening member 3
is pressed and moves in the direction of arrow B. The boss 3a of the arm of the shutter opening member 3 is the elongated hole 1 of the shutter 1.
a, and as the shutter opening member 3 moves as described above, the shutter 1 rotates in the direction of arrow C.
After passing through the state shown in FIG. 5B, the state shown in FIG. 5C is reached, and the insertion port 6 is opened.

Problems to be Solved by the Invention In order to prevent the shutter 1 from coming into contact with the front panel 5 when it rotates to open, the shutter 1 must be placed between the front panel 5 and the front panel 5 in the closed state, as shown in FIG. 5A.
It is necessary to separate the distance g from the back side of the For this reason, the conventional shutter mechanism has a problem in that it is difficult to improve its dustproof properties due to its structure.

Further, there is no particular means for restricting the rotation of the shutter 1 in the direction of the arrow C, so that if you do something like push up the shutter 1 with your fingertip, for example,
There was also a problem in that the shutter 1 rotated in the direction of arrow C and opened unnecessarily.

The object of the present invention is to provide a shutter mechanism for a disk case insertion port that solves the above-mentioned problems.

Means for Solving the Problems In the present invention, the shutter fits into the disk case insertion opening on the front panel and closes the insertion opening.
When opening, the shutter retreats to the back side of the front panel in the first stage, and in the subsequent stage, the shutter rotates to open, and in the closed state, the shutter is restrained from retreating.

Function: The shutter is fitted into the insertion slot and closed, improving dustproof performance. In addition, the configuration in which the shutter fits into the insertion slot and the shutter is restricted from retreating can prevent the shutter from being opened unnecessarily by pushing it up with a fingertip.

Embodiment Next, a shutter mechanism for a disk case insertion slot according to the present invention will be explained.

FIG. 1 shows a shutter mechanism 10 for a disk case insertion opening. The shutter mechanism 10 is provided on the front panel 12 side of the disc playback device 11, as shown in FIG.

First, the disc playback device 11 will be explained very briefly. After the disk case insertion slot 13 opens as described later, insert the disk case 14 into the insertion slot 1.
3 into the playback device ₁₁ in the direction of arrow Y1 and then pulled out, the video disk 15 is mounted on the turntable 16 and rotates. The carrier 18 to which the pick-up device 17 is attached moves in the direction of arrow _X1 , and the video disc 15 is played back. After playback is complete, the carrier 18 will be marked with an arrow.
X Move in _two directions and return to standby position.

Next, the shutter mechanism 10 will be explained. 1st
Fig. 2 and Fig. 2 A are in the closed state, Fig. 2 B
C shows a state in the middle of the opening operation, and C shows a state in which the opening operation is completed.

In each figure, 20 is a shutter, 21 is a shutter lever, 22 is a shutter opening member, and 23 is a support member.

In particular, as shown in FIG.
The arms 23a are bent upwardly on both ends,
The substantially central shafts 24 and 25 of 23b are fitted into holes in the front bracket 26, etc., and are rotatably supported.

The shutter 20 has side plate portions 20a and 20b at both ends.
The distal end side of the arm portion 23 is connected to the arm portion 23 by shafts 27 and 28.
It is rotatably supported at the upper ends of a and 23b.
The front side of this shutter 20 has a shape corresponding to the insertion opening 13 described above.

A shaft 27 serving as a pivot shaft extends outward from the bent arm portion 23a. Further, a pole 29 is installed in parallel to the shaft 27 at approximately the center of the side plate portion 20a.

The shutter opening member 22 has a bent shape consisting of a first guide groove 22a- ₁ that guides the tip of the shaft 27, a second guide groove 22a- ₂ , and a third guide groove 22a- ₃ that connects the two. A guide groove 22a and a rectangular window 22b into which the tip of the pole 29 fits are formed. The lower edge 2 of this window 22b
2b- ₁ functions as a rotating portion that is pushed up by the pole 29.

When the shutter is closed, the shutter opening member 22
As shown in FIG. ₁ and FIG.
₁ guides the shaft 27. This results in
The shutter 20 is moving in _two directions of arrow Y,
It fits into the insertion port 13.

In this way, since the insertion port 13 is closed with the shutter 20 fitted into the insertion port 13,
The shutter mechanism 10 has much better dustproof properties than the conventional one shown in FIG. 5A.

Moreover, in the state shown in FIG. 1 and FIG. 2A,
The rotation of the shutter 20 is restricted by the edge of the insertion port 13, and the movement of the shutter 20 in the direction of arrow _Y1 is restricted by the shaft 27 fitting into the first guide groove 22a- ₁ . There is. For this reason,
Even if you press the shutter 20 with your fingertip or try to move it up or down, the shutter 20 will not move;
It is reliably prevented from opening unnecessarily due to mischief.

Also, the front of the shutter 20 is the front panel 1.
2, the insertion opening 13 is not concave, and the disk playback device 11 has a flat front surface as a whole, as shown in FIG.

As shown in FIG. 2A, the shutter 20 is moved in the two directions of arrow Y and arrow D by a torsion coil spring 30 whose one end is locked to the front side bracket ₂₆ and the other end is locked to the pole 29. Forced in _one direction.

In addition, in the initial state shown in FIG. 2A, the pole 29 is located at the upper corner of the window 22b, and there is a space of dimension E between the pole 29 and the lower edge 22b- ₁ of the window 22b. There is.

Next, the operation when opening the shutter 20 will be explained.

In conjunction with the movement of the carrier 18 to the standby position in FIG. 3, the shutter lever 21 rotates in the direction of arrow F in FIG. 1, is pushed up by the torsion coil spring 31, and the shutter opening member 22 moves in the direction of arrow Z ₁ move in the direction.

At the initial stage of movement until the lower edge 22b- ₁ comes into contact with the pole 29, the shaft 27 is guided by the inclined third guide groove 22a- ₃ , as shown in FIG. As the shutter 20 rotates clockwise about the shaft 24, the shutter 20 moves in the direction of the arrow.
Y Move in _one direction. That is, the shutter 20 comes out of the insertion opening 13 and retreats to the back side of the front panel 12.

When the shutter opening member 22 moves further, the second
As shown in Figure C, the lower edge 22b- ₁ is connected to the pole 29.
The shutter 20 touches the shaft 2 and pushes it up.
7 in the direction of arrow _D2 against the spring 30, and retreats above the insertion port 13, so that the insertion port 13 is in the "open" state.

Note that when the member 22 moves as described above, the shaft 27 fits into the vertical second guide groove 22a- ₂ and moves as shown by the arrow.
Movement in the Y ₁ and Y ₂ directions is restricted, and the shutter 20
rotates stably around the shaft 27 whose position is regulated.

In this state, the disk case 14 is inserted through the insertion opening 13 in FIG. 3, and the disk 15 is mounted on the turntable 16.

Carrier 18 arrow X ₁ for disk regeneration
2, the shutter lever 21 rotates and the shutter opening member 22 moves in the direction of arrow _Z2 . The movement of the member 22 causes the shutter 20 to move to the first position.
In the first step, it rotates in the direction of arrow _D1 to reach the state shown in FIG. 2B, and in the second step, it moves in the direction of arrow _Y2 to become the state shown in FIG.

Effects of the Invention As mentioned above, according to the shutter mechanism for the disc case insertion slot of the disc playback device of the present invention,
When the shutter opens, the first step is to retreat to the back side of the front panel, and the second step is to rotate the shutter so that it is retracted from the disk case insertion slot. Because the structure fits inside the case insertion slot, there is no need to provide a special gap between the shutter and the disc case insertion slot to allow the shutter to open smoothly. Compared to a configuration in which the shutters face each other on the back side of the front panel, dustproofness can be greatly improved.Also, in the closed state, the shutter position is regulated by the guide groove, so even if you press the shutter, it will not close. does not move, and since the shutter is fitted into the disk case insertion slot, rotation of the shutter in the opening direction is restricted, and the shutter may open if you push or push it up with your fingertips. It has the feature of being able to reliably prevent it from being put away.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an embodiment of the shutter mechanism for the disk case insertion slot of the disk playback device of the present invention, and FIGS. Fig. 3 is a schematic perspective view of a disc playback device to which the shutter mechanism of the present invention is applied; Figure 4 is a perspective view of an example of a conventional shutter mechanism; Figure 5 is a perspective view of an example of a conventional shutter mechanism;
Figures A, B, and C are side views showing the shutter closed state, the shutter opening state in the middle, and the shutter open state, respectively. DESCRIPTION OF SYMBOLS 10... Shutter mechanism for disk case insertion slot, 11... Disc playback device, 13... Disc case insertion slot, 14... Disc case, 20
...Shutter lever, 21...Shutter lever, 22...
...Shutter opening member, 22a...Guide groove, 22
a- ₁ ...first guide groove, 22a- ₂ ...second
22a- ₃ ...Third guide groove,
22b...square window, 22b- ₁ ...lower edge, 23...
...Support member, 27...Shaft, 29...Pole, 30
...Torsion coil spring.

Claims (1)

[Scope of Claim for Utility Model Registration] In a shutter mechanism for a disc case insertion slot that normally closes the disc case insertion slot on the front panel of a disc playback device and opens when a disc case is inserted, the front side is a shutter member having a shape corresponding to the opening and closing the insertion opening when fitted into the insertion opening; and a shutter member that supports a pivot shaft of the shutter member and extends the shutter member in a direction perpendicular to the front panel. The shutter opening member is comprised of a support member movably supporting the shutter, and a shutter opening member that moves to open the shutter, and the shutter opening member is fitted with the rotation support shaft and, at an initial stage of movement, the shutter opening member is moved to open the shutter. a guide groove configured to retreat toward the back side of the front panel from the position where the guide groove is fitted into the insertion opening;
A shutter mechanism for a disc case insertion opening of a disc playback device, comprising a rotation portion that acts on the shutter member to rotate the shutter member about the rotation shaft after the shutter member is retreated.