JPS6232384Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a magnetic sheet jacket used as a recording medium in electronic still cameras, etc., in which information signals such as still image signals are recorded on a magnetic sheet. .

<Prior Art> Conventionally, magnetic sheet jackets have been proposed in which the magnetic sheet is housed in a jacket housing in order to protect the fragile magnetic sheet and to make handling and storage convenient.

10 previously proposed magnetic sheet jackets
As shown in FIG. 1, 0 is the upper and lower surfaces of the jacket casing 101 containing the magnetic sheet A, which is a part of the top plate and bottom plate that constitute the jacket casing 101, and has the same shape as the magnetic sheet A. On the other hand, a window 102 is provided into which a magnetic head for recording a predetermined information signal or for reading out a recorded information signal is inserted. Jacket housing 10 provided with this window portion 102
1, the window 102 is opened when the magnetic sheet jacket 100 is installed in a jacket holder in a recording and/or reproducing apparatus, and the window 102 is opened when the magnetic sheet jacket 100 is removed from the jacket holder. Shutter 1 in a sliding type that closes
03 is installed.

The movement of the shutter 103 in the direction of opening the window 102 (movement to the right in FIG. This is done by dragging the shutter 103 inside the hole 104 and moving it relatively to the right in the figure. Furthermore, the movement of the shutter 103 in the direction of closing the window 102 (movement to the left in FIG. 1) is caused by the return force of the tension coil spring 105 stretched by the movement of the shutter 103 in the opening direction. It is carried out by.

Note that one end 105a of the coil spring 105 is attached to a pin 10 set up in the jacket housing 101.
6, and the other end 105b is hooked to the hook portion 10 formed on one side edge of the shutter 103.
It is hung on 7.

By the way, in the case where the shutter 103 is structured to return to its closed position by the elastic force of the tension spring 105 as described above, the shutter 103
The amount of return movement is determined by the length of the coil spring 105. Therefore, in order to ensure the amount of return movement of the shutter 103, the coil spring 1 is
It is necessary to increase the length of 05.

However, if the length of the coil spring 105 is increased, there is a risk that the coil spring 105 may bend and damage the magnetic sheet A within the jacket housing 101. Therefore, a spring support pulley 108 is provided at a corner inside the jacket housing 101, and a coil spring 105 is wound around this pulley 108.
It extends along the corner portion of the jacket housing 101.

<Problems to be solved by the invention> Therefore, in the case of a structure in which the shutter 103 is returned to its closed state using a tension coil spring 105, a spring support is provided in order to prevent damage to the magnetic sheet A. A separate pulley 108 is required, which inevitably increases the number of parts. Also, when assembling the coil spring 105, the spring 105 is attached to the pulley 1.
08, it is necessary to insert the spring 105 between the pulley 105 and the corner side wall 101A of the jacket housing 101, which requires a narrow assembly space, resulting in a complicated assembly.

Therefore, the present invention aims to solve the above-mentioned problems of the conventional ones and reduce the number of parts, and also uses a magnetic sheet jacket that makes it easy to assemble the shutter return spring into the jacket housing. It is proposed for the purpose of providing.

<Means for Solving the Problems> In order to solve the problems of the above-mentioned conventional products and achieve the above object, the present invention provides a jacket in which a magnetic sheet is rotatably housed. A window portion into which a magnetic head for recording a predetermined information signal on the magnetic sheet or reading out the recorded information signal is inserted is provided in a part of the top plate and bottom plate of the housing, and the window portion is operated to open and close. In a magnetic sheet jacket provided with a shutter, a linear spring that returns and moves the shutter in the direction of closing the window is locked at one end to the jacket housing and engaged at the other end to the shutter. The shutter inside the jacket housing is disposed on the side where the shutter moves in the direction of opening the window.

<Function> In the present invention, the shutter in the jacket housing is biased to move in the direction of closing the window by the biasing force of a linear spring disposed on the side where the shutter moves in the direction of opening the window. has been done.

<Example> An example of the present invention will be specifically described below with reference to FIGS. 2 and 3.

As shown in FIG. 2, a disk-shaped magnetic sheet A is rotatably housed in the jacket housing 2 of the magnetic sheet jacket 1 according to the present invention, and on this sheet A, for example, a stationary magnetic sheet is placed. Information signals such as image information are recorded to form a plurality of circular tracks. This jacket housing 2 has a
A window 3 having the same shape is formed on the top plate on the upper surface side in FIG. 2 and the bottom plate on the lower surface side in FIG. A part of it is now facing outward. One or more magnetic heads (not shown) are inserted into the window 3, and the magnetic heads record, for example, a plurality of unit video signals concentrically on the magnetic sheet A. Also, the recorded video signal is read out. Further, a disk-shaped reinforcing member 6 having a drive hole 5 into which a rotational drive shaft of a recording and/or reproducing device (not shown) is inserted is attached to the rotational center of the magnetic sheet A. can rotate around an opening 7 provided in the jacket housing 2.

Furthermore, a display means 10 for counting and displaying the number of annular tracks recorded on the magnetic sheet A is provided in a part of the jacket housing 2. This display means 10 includes a disc-shaped dial display member 12 having a hook-shaped display hole 11.
and a stopper member 14 that includes an engaging portion 14a that elastically engages with the sawtooth portion 13a of the rotating gear 13 that is integrally provided on the dial display member 12.
It is composed of. The above dial display member 1
2 is housed in the jacket casing 2 and is rotatable at the position of the opening 15 opened in the casing 2. Further, the stopper member 14 is fixed within the jacket housing 2 by set screws 16, 16, and is configured to rotate the rotating gear 13 intermittently.

A scale 17 is provided around the opening 15 of the jacket housing 2 to display a number corresponding to the number of annular tracks magnetically recorded on the magnetic sheet A. In this embodiment, a scale 17 up to "50" is provided. A notch 18 formed in the display hole 11 indicates each position of the scale 17.

On the other hand, between the jacket housing 2 and the magnetic sheet A and at a position corresponding to the window 3, there is a thin plate-shaped sliding shutter large enough to close the window 3. 19 are arranged so as to be freely slidable. This shutter 19 is for preventing dust and the like from entering the jacket housing 2 from the window portion 3. In this embodiment, one slide plate 20 is arranged on each of the upper and lower sides of the magnetic sheet A, and a connecting portion is provided on the upper surface in FIG. 2, so that the overall structure is U-shaped. This slide plate 20 is provided with guide pins 21, 21 facing outward, and these guide pins 21, 21 guide grooves 22 formed in the top plate and bottom plate inside the jacket housing 2.
It is designed to move along... Therefore, the slide plate 20 can slide only in the left and right directions in FIG.

The tip of the slide plate 20 (left end in Figure 2) 2
A protrusion 23 is formed to protrude from 0A, and this protrusion 23 is inserted into an elongated hole 25 formed along one side plate 24 of the jacket housing 2. Therefore, this protrusion 23 faces the outer part of the jacket housing 2 from inside the elongated hole 25. Further, the protrusion 23 is engaged with a guide fixing pin provided on a jacket holder on the side of the device (not shown) into which the jacket housing 2 is loaded.

Then, the shutter 1 inside the jacket housing 2
At the right corner in FIG. 2, which is the side where 9 moves in the direction of opening the window 3, a long linear spring 26 curved in an arched shape for returning the shutter is disposed. has been done. One end (free end) 26a of the linear spring 26 is abutted against and locked to the proximal edge 20A of the slide plate 20, and the other end 26b is bent into a U-shape to support the above-mentioned display inside the jacket housing 2. It is engaged and locked in an engagement recess 27 provided near the means 10.

Note that one end 26a of the linear spring 26 is curved outward so that it can slide on the proximal edge 20A of the slide plate 20 while being elastically displaced when the shutter 19 moves. Further, two positions in the length direction of the linear spring 26 are supported by position regulating pins 28 and 29 planted in the jacket housing 2 so that the linear spring 26 does not bend and move toward the magnetic sheet A side. has been done.

When the magnetic sheet jacket 1 according to the present invention is loaded into a jacket holder of a magnetic recording and/or reproducing device, the guide fixing pin provided in the holder moves inside the elongated hole 25 toward the left in FIG. Move to. Due to the movement of the pin, the shutter 19 is moved to the second position against the biasing force of the linear spring 26.
A movement operation is performed in the right direction in the figure to open the window portion 3.

When the magnetic sheet jacket 1 is taken out from within the holder, the operation of moving the pin relative to the shutter 19 is released. Then,
The shutter 19 is connected to the linear spring 26 in which spring force is accumulated by the opening movement operation of the shutter 19.
is moved in the direction of closing the window 3 by the return force of the window 3, thereby closing the window 3. Note that the slide plate 20 has pin 2 of the slide plate 20, for example.
1, the guide groove 22 is stopped at one end 22a of the guide groove 22, and is stopped at the position shown in FIG. 2, and movement to the left in the figure is prevented.

As shown in FIG. 3, the other end 26b of the linear spring 26 is bent into an L-shape, and the bent portion 26c is placed between two position regulating pins 30 and 31 that are planted in the jacket housing 2. The stopper member 14 is held at the other end 26b of the linear spring 26.
V-shaped claw portion 3 that has the same function as the engaging portion 14a of
2 is integrally molded, the stopper member 14 becomes unnecessary and the number of parts can be further reduced.

<Effects of the Invention> As is clear from the above description, according to the present invention, the number of parts can be reduced compared to the conventional one, and costs can be reduced.

Furthermore, according to the present invention, there is no need to insert a coil spring between the corner side wall of the jacket housing and the spring support pulley, which requires a narrow installation space, and to hook the spring to the pulley. , the assembly is facilitated by simply inserting the linear spring into a predetermined position within the jacket housing.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing a conventional magnetic sheet jacket, FIG. 2 is a partially cutaway plan view showing a magnetic sheet jacket according to the present invention, and FIG. 3 is a partially cutaway plan view showing another embodiment of the present invention. FIG. DESCRIPTION OF SYMBOLS 1... Magnetic sheet jacket, 2... Jacket housing, 3... Window, 19... Sliding shutter, 26... Linear spring, A... Magnetic sheet.

Claims (1)

[Scope of utility model registration request] A window portion into which a magnetic head for recording a predetermined information signal on the magnetic sheet or for reading out the recorded information signal is inserted into a part of the top plate and the bottom plate of a jacket housing which rotatably stores a magnetic sheet. In the magnetic sheet jacket which is provided with a shutter for opening and closing the window, a linear spring for returning the shutter in the direction of closing the window is connected at one end to the jacket housing. 1. A magnetic sheet jacket, characterized in that the magnetic sheet jacket is disposed in the jacket housing on a side where the shutter moves in a direction to open the window portion, with the other end engaged with the shutter.