JPS6138149Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic sheet jacket loaded into an electronic camera or the like in which still image information, etc. is magnetically recorded on a magnetic sheet. When the jacket casing constituting the part is inserted into the jacket holder of the magnetic recording/reproducing device, the shutter that always closes the magnetic head insertion window is automatically opened and the jacket casing is inserted from inside the holder. The present invention attempts to propose a magnetic sheet jacket in which the shutter is automatically closed when the jacket is removed, and furthermore, the jacket is locked in the closed state.

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

Incidentally, a window portion into which a magnetic head provided on the magnetic recording/reproducing device is inserted is formed in a part of the jacket casing that constitutes the outer casing portion of the magnetic sheet jacket. It is known that the lid is arranged so that it can be opened and closed. by the way,
Under normal conditions, the lid is pulled back and held in a position where the window closes due to panel pressure or the like. Therefore,
If you touch this lid from the window with your hand, it will move, and the window will open accidentally, allowing dust to enter the jacket housing through the window, and the dust to adhere to the magnetic sheet inside. This is a factor that adversely affects recording and reproduction, or shortens the lifespan of magnetic sheets and magnetic heads.

The present invention was proposed in view of these conventional drawbacks, and the lid is locked in the position where the window is closed unless the jacket housing is inserted into the magnetic recording/reproducing device. When inserting the jacket into the magnetic recording and reproducing device, the lock is released and the lid opens automatically in conjunction with this insertion operation, while when the jacket case is removed from the recording and reproducing device, the lid opens automatically. The object is to provide a magnetic sheet jacket which can be closed and relocked.

That is, in the present invention, a rotating magnetic sheet is housed in a magnetic sheet jacket formed by butting a base half and a cover half, and the sheet jacket has a window for allowing the magnetic head to slide into contact with the magnetic sheet. At the same time, the magnetic sheet jacket is equipped with a cover for opening and closing the window so that it can be moved freely between the window closed position and the window open position. A lid provided on a recording/reproducing apparatus into which this magnetic sheet jacket is loaded, wherein one half of the magnetic sheet jacket is provided with a lock portion formed such that a lock pawl for locking the lid in the window closed position is movable. It is characterized in that the opening actuating part and the lock part collide with each other just before the lid is opened, thereby releasing the lock of the lock pawl from the lid.

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

First, FIG. 1 shows a magnetic sheet jacket to which the present invention is applied.

As shown in this drawing, a disc-shaped magnetic sheet 2 is rotatably housed in a jacket housing 1, and a video signal such as still image information is transmitted onto a plurality of annular tracks on this sheet 2. It is now being magnetically recorded to form a . A window 3 is opened in a part of the jacket housing 1, so that a part of the magnetic sheet 2 is exposed to the outside. One or more magnetic heads provided in a magnetic recording device (not shown) are inserted into the window portion 3, and the magnetic sheets 2 and 2 are read by the magnetic heads.
A plurality of video signals are magnetically recorded concentrically on the top.

Further, a disk-shaped reinforcing member 8 having a drive hole 7 into which a rotational drive shaft of a magnetic recording device (not shown) is inserted is attached to the rotational center of the magnetic sheet 2, and this reinforcing member 8 is attached to the jacket housing. It is designed to be able to rotate around an opening 9 provided in the body 1.

Further, at the upper window portion 3 in the jacket housing 1, a plate-shaped lid 19 formed in a bifold shape and having a U-shaped cross section is arranged to open and close the window portion 3. ing. The lids 19 are located on both sides of the magnetic sheet 2 and are used to prevent dust from entering the jacket housing 1 through the window 3 and to prevent the magnetic sheet 2 from being damaged or soiled.

A slide plate 2 is provided on one side edge of the lid body 19.
0 is integrally attached, and this slide plate 20
Guide pins 21, 21 are provided on the upper and lower surfaces of the cover half 10 and base half 1 in the jacket housing 1, respectively.
The guide grooves 22 formed in 1 are movable along guide grooves 22 formed in 1. Therefore, the slide plate 20
is designed to be able to slide only in the left and right directions in FIG.

A protrusion 2 is provided at one end 20a of the slide plate 20.
3 is formed to protrude, and this protrusion 23 is inserted into a long hole 25 formed along one side plate 24 of the jacket housing 1.

Therefore, this protrusion 23 is exposed to the outside from inside the elongated hole 25. The outer end surface 23A of the protrusion 23 comes into contact with a protrusion 28 provided on the jacket holder 26 into which the jacket housing 1 is loaded.

Further, an insertion and engagement hole 39 for a lock pawl 37 (to be described later) is formed on the lower side of the protrusion 23, and the lock pawl 37 inserted through the hole 39 is inserted into an engagement recess provided below the protrusion 23. 23B.

Reference numeral 33 denotes a lock lever constituting a locking means, and the proximal end 33B side part is integrally fixed to the base half 11 of the jacket housing 1, and the distal end 33A side part is inserted from the base half 11 through the cut hole 34. As a result, the lever 3
3, the tip 33A side part is elastically movable. A lock pawl 37 that engages with the engagement recess 23B is bent upward and protrudes from the free end of the tip 33A of the lever 33, and a portion closer to the middle of the lock pawl 37 has a lock pawl 37 bent upward. For example, a protrusion 38 protruding in a trapezoidal shape or the like is provided. In addition, under normal conditions, this protrusion 38 is exposed to the outside from inside the elongated hole 25, and the projection 38 is exposed to the outside from the elongated hole 25.
is in contact with the tip 28A of the protrusion 28 provided on the jacket holder 26 into which the lock lever 33 is loaded, and the portion of the lock lever 33 on the tip 33A side is deformed and moved clockwise in FIG. This is for moving it so as to separate it from the mating recess 23B.

One end 29a of a stretchable elastic member 29 is locked at the position of the protrusion 23 of the slide plate 20. The other end 29b of this elastic member 29 is locked to a pin 30 fixed within the jacket housing 1. In addition, near the middle part of this elastic member 29,
In order to improve the expansion and contraction state of the elastic member 29, a rotary pulley 32 is rotatably attached to the fixed shaft 31. The slide plate 20 is always pulled leftward in FIG. 1 by the elastic force of the elastic member 29. Therefore, the window 3 is always completely closed by the lid 19. In addition, the slide plate 20
is adapted to be locked to one end 22a of the guide groove 22 by, for example, the pin 21 of the slide plate 20, and is stopped at the position shown in FIG. 1, and movement to the left in the figure is prevented. It's becoming like that.

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

Under normal conditions, that is, when the jacket is not loaded into the magnetic recording/reproducing apparatus, the lid body 19 is pushed against the window portion 3 by the tension of the spring 29, as shown in FIG.
is in a closed state. At this time, the lock pawl 37 of the lock lever 33 engages with the engagement recess 23B to lock the lid 19 (see FIG. 3A). Therefore, in this state, even if the lid body 19 is touched from the window portion 3, there is no risk of the lid being accidentally opened.

Therefore, when the jacket housing 1 is inserted into the jacket holder 26 from the state shown in FIG. move towards

When the jacket housing 1 is inserted into the jacket holder 26 to a predetermined position, the protrusion 28 formed in the holder 26 is inserted into the elongated hole 25 formed in the one side plate 24 of the jacket housing 1. Subsequently, the jacket housing 1 is placed in the holder 26.
When pushed in, the protrusion 38 of the lock lever 33 provided on the jacket housing 1 comes into contact with the protrusion 28, deforming the tip 33A side of the lever downward and moving the lock pawl 37 downward in the figure. Then, the claw 37 is removed from the engagement recess 23B to release the lock (see FIG. 3B). Note that, following this unlocking, the protrusion 28 further comes into contact with the outer end surface 23A of the protrusion 23, and the protrusion 23 contacts the elastic member 2.
It is pushed to the right in FIG. 1 against the elastic force of 9 (see FIG. 3C). Therefore, the slide plate 20 having the protrusion 23 moves rightward in FIG. 1 along the guide groove 22, and the lid 19 attached to the slide plate 20 also moves in the same direction. Therefore, the lid 19 that had completely closed the window 3 is moved from the window 3, and the window 3 is opened.

With the jacket casing 1 loaded in the holder 26 in this manner, the window 3 is sufficiently opened and the magnetic head can be brought into contact with the magnetic layer surface of the magnetic sheet 2.

Further, when the jacket housing 1 is removed from the holder 26, the pressing force of the protrusion 28 on the lid 19 is released, so that the lid 19 is moved by the elastic member 29.
The pulling force automatically returns the window 3 to close again as shown in FIG. Then, the outer end surface 23A of the protrusion 23 comes into contact with the outer inclined surface 37a of the lock pawl 37, deforming the lock pawl 37 downward, and when the pawl 37 faces the insertion engagement hole 39, the hole 39 and is inserted into the engagement recess 23B, and is in a locked state (see FIG. 3D).

As shown in FIG. 2, the lock lever 33 is molded integrally with one half 10 or 11 constituting the jacket housing 1, and a movable portion including a protrusion 38 and a lock pawl 37 is attached to the lever tip 33.
A, and the base end 33B is attached to the jacket housing 1.
Since it is molded integrally with the jacket, there is no need to assemble separate parts, and it can be constructed as a part of the jacket housing 1.

Further, although an example has been described in which the lid body 19 is internally assembled within the jacket housing 1, it may be arranged along the outer surface of the jacket housing 1 so that the window portion 3 can be opened and closed.

As mentioned above, in the present invention, the lid that opens and closes the window of the magnetic sheet jacket can be locked during normal operation to prevent the lid from being opened inadvertently. The above-mentioned lock can be automatically released in conjunction with the normal mounting operation, and the intended purpose can be fully achieved.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing an embodiment of the present invention, Fig. 2 is a perspective view of the main parts showing the lock portion, and Figs. 3 A to D are partially cutaway views showing the operating states of the lock portion in the order of operation. FIG. 1...Jacket housing, 2...Magnetic sheet, 3
... Window section, 19 ... Lid body, 23 ... Projection, 23B
...Engaging recess, 28...Protrusion, 37...Lock claw, 38...Protrusion.

Claims (1)

[Scope of utility model registration request] A rotating magnetic sheet is housed in a magnetic sheet jacket formed by butting a base half and a cover half, and the sheet jacket has a window for sliding the magnetic head against the magnetic sheet. In the magnetic sheet jacket, a lid body for opening and closing the window is installed in the magnetic sheet jacket so as to be movable between a window closed position and a window open position. A lock part is provided on the half so that a lock pawl for locking the lid in the window closed position is movable, and a lid opening actuating part is provided in a recording/reproducing apparatus into which this magnetic sheet jacket is loaded. A magnetic sheet jacket characterized in that the lock portion abuts against the lid immediately before opening the lid to release the lock of the lock pawl from the lid.