JPS6141186Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic sheet jacket that is used by being loaded into a so-called electronic camera, in which information signals such as still image information are magnetically recorded on a magnetic sheet.

Traditionally, for convenience in handling and storage,
For example, a magnetic sheet jacket has been proposed in which a magnetic sheet for magnetically recording still images and the like is housed inside a jacket housing.

By the way, in a magnetic sheet jacket in which a window portion is formed in a part of the jacket housing into which a magnetic head provided on the magnetic recording/reproducing device side or a guide plate for guiding the rotation of the magnetic sheet is inserted, the jacket In order to prevent dust from entering the jacket housing through the window during storage, etc., the window is The shutter plate that closes the door is arranged so that it can be opened and closed.

However, the shutter plate is generally only elastically pulled back to the window closing position by a spring placed inside the jacket housing, so if your hand touches the shutter plate itself from the window, the window will close. The shutter plate may move to the position where it opens. When such a situation occurs, dust enters the inside of the jacket housing through the window and adheres to the magnetic sheet inside, resulting in poor recording and playback. Alternatively, unexpected results may occur, such as a fingertip being inserted through the window and damaging the magnetic recording surface of the magnetic sheet.

The present invention has been newly developed in view of these conventional drawbacks and to eliminate them.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

1 and 2 are an external plan view and a bottom view of a magnetic sheet jacket according to the present invention. As shown in FIG. 3, a disc-shaped rotating magnetic sheet (hereinafter simply referred to as magnetic sheet) 3 is rotatably housed in a jacket housing 2 that constitutes the outer housing of this jacket 1. As shown in FIG. 4, a magnetic recording section is formed on the sheet surface 3a of the sheet 3 on the side facing the magnetic head 4. As shown in FIG.

A window 5 is opened in a part of the jacket housing 2, so that a part of the magnetic sheet 3 is exposed to the outside. Inside this window part 5,
Sheet guide plates 6 and 7 are inserted to stabilize the rotation of one or more magnetic heads 4 and magnetic sheets 3. The magnetic head 4 is moved in the radial direction of the magnetic sheet 3, for example, every rotation of the sheet 3, and magnetically records video signals so as to form annular recording tracks at predetermined intervals on the magnetic sheet 3. Record.

Note that the magnetic recording/reproducing device main body (hereinafter simply referred to as the device main body) is located at the center of rotation of the magnetic sheet 3.
A disk-shaped rotation support member 11 having a drive hole 10 into which the rotation drive shaft 9 on the side 8 is inserted is attached, and this rotation support member 11 is attached to the jacket housing 2.
It is designed to be able to rotate around an opening 12 provided in the.

Further, a count display mechanism 13 is provided inside the jacket housing 2.

This count display mechanism 13 includes, for example, a disc-shaped dial display member 15 that indicates a scale 17 provided around an opening 16 formed in a part of the jacket housing 2, and this dial display member. 15 at predetermined rotational angle positions intermittently.
The dial display member 15 is attached to the jacket housing 2.
It is rotatably arranged at the opening 16 position. Around this opening 16, there are scales 17 of the same number as the total number of recording tracks that can be recorded on the magnetic sheet (for example, 50 tracks). This scale 17 is indexed by an index portion 15a formed by cutting out a part of the dial display member 15. In the through hole 15b provided in the dial display member 15, the dial display member 15 can be moved one step at a time on the scale 17 in conjunction with the movement of the magnetic head 5 one step at a time.
Counter drive shaft 18' for moving scale by scale
is inserted.

On the other hand, the upper half plate 2a and the lower half plate 2b constituting the jacket housing 2 and the magnetic sheet 3
A shutter plate 19, which is large enough to close the window 5, is arranged between the window 5 and the window 5 so as to be openable and closable. This shutter plate 19 is used to prevent dust from entering the jacket housing 2 from the window portion 5, and in this embodiment, as shown in FIG. It is formed to have a U-shaped cross section so as to cover it.

At one end of the one side edge of the shutter plate 19,
A locking pin 19a is fixed to the locking pin 19a, and one end 20 of a stretchable elastic member 20 is attached to the locking pin 19a.
a is locked. The other end 2 of this elastic member 20
0b is locked to a locking portion 21 fixed inside the jacket housing 2. A rotary pulley 23 is rotatably attached to a fixed shaft 22 near the middle of the elastic member 20 in order to improve the elastic member 20's elasticity. Therefore, the shutter plate 19 is always pulled back to the right in FIG. 3 by the elastic force of the elastic member 20. Therefore, under normal conditions, the window portion 5 is completely closed by the shutter plate 19. A stopper portion 24 is integrally molded with the jacket housing 2 and is provided in a protruding manner at a position on the outer circumference of the window portion 5 and opposite to the locking pin 19a. It is stopped by the stopper portion 24 at the position shown in FIG. 3, and further movement to the right in the figure is prevented.

At both end portions of one end edge of the shutter plate 19, guide pieces 26 are guided by protruding guide portions 25 provided along one end edge of the jacket housing 2.
a and 26b are bent. This guide piece 2
One of the guide pieces 26b of 6a and 26b has a
Furthermore, a protrusion 27 in the form of a protrusion is formed to protrude, and this protrusion 27 is inserted into a long groove 28 formed with a notch in one end edge of the jacket housing 2, and is exposed from the long groove 28 to the outside. (See Figure 5). The protrusion 27 is engaged with an engaging protrusion 29 for opening the shutter plate provided on the side of the magnetic recording or reproducing device when the jacket housing 2 is loaded into the magnetic recording or reproducing device. be.

Next, the shutter plate 19 is pushed out of the window 5 to open the window 5 as shown by the dashed line in FIG. 3 (hereinafter referred to as the opening position).
An engagement stepped portion 30 that engages with the shutter plate 19 is provided at the position where movement toward the _K1 side starts. This engagement stepped portion 30 is for preventing the shutter plate 19 from moving to the opening position _K1 only when the shutter plate 19 is pressed from the window portion 5 with a fingertip or the like. A slide groove 31 is provided between the engagement step portion 30 and the guide portion 25 along the guide portion 25 so that the shutter plate 19 can move.

As shown in FIG. 2, on the back surface of the jacket casing 2, a breakable anti-erase claw 32 is provided to prevent valuable recorded contents from being erased by mistake.

Next, the operation of the magnetic sheet jacket 1 of the present invention having the above structure will be explained.

First, the shutter plate 19 has a protrusion 2 provided thereon.
By pressing 7, the shutter plate 19
A case where the object is pushed out of the window 5 will be described.

In normal times, that is, when the magnetic sheet jacket 1 is not loaded into the jacket holder of the magnetic recording/reproducing apparatus, the shutter plate 1 is closed as shown in FIG.
9 is located at a closed position K ₂ in which the window portion 5 is closed under the pulling force of the elastic body 20 . When the jacket housing 2 is inserted into the jacket holder from this state, both sides 2c and 2d of the jacket housing 2 are pushed inward into the holder while being received by a pair of jacket receiving portions provided on the jacket holder side.

When the jacket housing 2 is inserted into the jacket holder to a predetermined position, the projection 29 for opening the shutter plate formed inside the holder will be inserted into the long groove 28 formed on one side plate of the jacket housing 2. . Subsequently, when the jacket housing 2 is pushed into the holder, a protrusion 27 provided on the shutter plate 19 on the jacket housing 2 side comes into contact with the opening protrusion 29, and the protrusion 27 is pushed to the left in the figure. be done. Therefore, the protrusion 27 is pushed in against the elastic force of the elastic member 20 in a direction opposite to the direction in which the jacket housing 2 is inserted into the jacket holder (leftward in FIG. 3). Therefore, the shutter plate 19 having the protrusion 27 moves to the left in FIG. 3 along the guide portion 25. Therefore, the shutter plate 19 that had completely closed the window 5 is expelled from the window 5, leaving the window 5 open.

When the jacket housing 2 is completely loaded into the holder as described above, the window 5 is fully opened.
A magnetic head can be brought into contact with the magnetic layer surface of the magnetic sheet 3 through the window portion 5 .

Furthermore, when the jacket housing 2 is removed from the holder, the pressing force of the shutter plate opening protrusion 29 on the holder side against the shutter plate 19 is released, so that the shutter plate 19 is re-opened by the pulling force of the elastic member 20. The window 5 is automatically returned to the closed position as shown in Figure 3.

Next, a case where the shutter plate 19 is tried to be pushed out from the window portion 5 by a fingertip or the like will be explained.

First, when the shutter plate 19 is grasped from the window portion 5 with the fingertips and an attempt is made to press it toward the opening position _K1 , the jacket is opened by the projection 29 for opening the shutter plate provided on the jacket holder side as described above. Unlike the case where the protrusion 27 provided on the housing 2 side is pressed in a predetermined direction, as shown in FIG. Pressure force is applied.

Therefore, in the shutter plate 19, the side portion 19b of the shutter plate 19 on the guide portion 25 side is connected to the guide portion 25.
Rotate until it touches the side wall of the Therefore,
One guide piece 26a of the shutter plate 19 projects from within the long groove portion 28 toward the outside of the jacket housing 2. Therefore, the shutter plate 19 is moved to the opening position K ₁
Even if an attempt is made to press the shutter plate 19, the tip of the guide piece 26a provided on the shutter plate 19 comes into contact with the engagement step 30, so the presence of the engagement step 30 pushes the shutter plate 19 to the opening position _K1. Can not do it. Therefore, under normal conditions when the magnetic sheet jacket 1 is not loaded into the jacket holder, the shutter plate 19 may be accidentally removed from the window 5.
It is possible to prevent a situation in which the object is pushed out to the opening position _K1 .

As is clear from the above description, the present invention has a magnetic head for magnetically recording required information signals on the rotating magnetic sheet inserted into a part of the jacket housing in which the rotating magnetic sheet is rotatably incorporated. A magnetic sheet jacket is provided with a shutter plate that can move between an open position where the window is opened and a closed position where the window is closed. The jacket housing is provided with a guide portion that guides the shutter plate between an open position and a closed position, and a guide portion that guides the shutter plate from the window portion to the opening position side is provided. Since it is provided with an engaging stepped portion that engages with the shutter plate only when the shutter plate is pressed, even if an attempt is made to press the shutter plate toward the opening position from within the window,
Since the tip of the guide piece provided on the shutter plate comes into contact with the engagement step, the shutter plate cannot be pressed and moved to the open position due to the presence of the engagement step. Therefore, during normal times when no magnetic sheet jacket is loaded into the jacket holder, it is possible to prevent the shutter plate from being inadvertently pushed out from the window to the open position. Therefore, damage to the magnetic sheet can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the magnetic sheet jacket according to the present invention, FIG. 2 is a bottom view of the magnetic sheet jacket shown in FIG. 1, and FIG. 3 is a plan view showing the inside of the jacket housing. , Fig. 4 is a sectional view taken along line A-A in Fig. 1 of the magnetic sheet jacket before it is attached to the main body of the device, Fig. 5 is a perspective view of the main parts showing the vicinity of the shutter plate, and Fig. 6 is a view of the shutter plate from inside the window. FIG. DESCRIPTION OF SYMBOLS 1... Magnetic sheet jacket, 2... Jacket housing, 3... Rotating magnetic sheet, 4... Magnetic head, 5... Window section, 8... Magnetic recording and reproducing device main body,
19... Shutter plate, 25... Guide section, 27...
...Protrusion, 29...Protrusion, 30...Engagement step, K ₁
...opening position, K ₂ ...closed position.

Claims (1)

[Scope of utility model registration request] A window portion into which a magnetic head for magnetically recording a required information signal on the rotating magnetic sheet is inserted is provided in a part of the jacket housing in which the rotating magnetic sheet is rotatably housed, and the window portion is opened. In a magnetic sheet jacket comprising a shutter plate that is movable between an open position and a closed position, the jacket housing includes a shutter plate that extends between the open position and the closed position. In addition, an engaging stepped portion is provided at a position where the shutter plate starts moving toward the opening position to engage with the shutter plate only when the shutter plate is pressed from the window portion. A magnetic sheet jacket characterized by: