JP2007087518A - Photosensitive recording medium cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cartridge capable of effectively preventing a photosensitive recording medium from being exposed to light. <P>SOLUTION: In the photosensitive recording medium cartridge, a distance between a light shielding plate 12 and a face 25b, opposed to the light shielding plate 12, of a cartridge body 11 is almost the same as the thickness of a shutter in a range of an aperture 14, and a distance between the light shielding plate 12 and a face 25c, opposed to the light shielding plate 12, of the cartridge body 11 is gradually narrowed from the shutter opening direction side edge part 11s of the cartridge body 11 to the shutter opening direction side edge part 18s of the aperture 14 and connected to the aperture range. Consequently, a degree of adhesion to a shutter sliding surface can be improved in a recessed part among the light shielding plate 12, the shutter and the cartridge body 11 and a closed state of the cartridge can be held. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cartridge that accommodates a photosensitive recording medium, and more particularly, to a photosensitive recording medium cartridge that can improve the light shielding performance with respect to the photosensitive recording medium accommodated therein.

  Recently, a hologram recording medium for recording data using a hologram has been proposed (see, for example, Patent Document 1). This hologram recording medium is a photosensitive recording medium in which a hologram recording layer made of a photosensitive material is laminated on a disk-shaped support, and performs data recording as interference fringes by coherent light such as laser light. It is. In this hologram recording medium, a data recording capacity larger than that of a conventional DVD can be obtained by recording and forming interference fringes including a large amount of data in a multilayer recording layer.

  This hologram recording medium is known to be handled while being rotatably accommodated in a thin box-shaped cartridge having a light-shielding function in order to prevent the hologram recording layer from being inadvertently exposed. (For example, refer to Patent Document 2). In this cartridge, an upper shell and a lower shell for accommodating the hologram recording medium so as to be sandwiched from both sides in a rotatable state, and a part of the hologram recording medium to the outside of the cartridge body composed of the upper shell and the lower shell. An external opening formed so as to be exposed and a shutter for opening and closing the opening are provided. In particular, the cartridge body is formed of a material that blocks the sensitive color of the hologram recording layer. A sponge-like light shielding material is attached to the joint of the movable part that exposes the hologram recording medium to the outside.

In addition, a cartridge in which a cartridge body, a shutter, and a cover are configured is also known (see, for example, Patent Document 3). This cartridge is provided with an overlap between the opening around the cartridge body and the shutter, and between the shutter and the opening around the cover, and these double overlaps allow light and dust to enter the cartridge body from the outside. It is preventing.
JP 2004-029476 A JP 2003-317422 A JP 2003-317424 A

  By the way, in the cartridge that accommodates the hologram recording medium, if the light shielding between the cartridge main body and the shutter is not properly performed, the light enters the cartridge and adversely affects the hologram recording medium.

  However, when the sponge-like light shielding material provided between the cartridge main body and the shutter is peeled off or deteriorated as in the cartridge described in Patent Document 2, there is a problem that appropriate light shielding cannot be performed immediately.

  In the cartridge described in Patent Document 3, the cover is housed and attached in a recess formed in the cartridge body, and has a shutter protection function. However, in this cartridge, although the dust-proof structure is described, the light-shielding structure is not described at all, and the cartridge for the photosensitive recording medium does not necessarily have sufficient performance.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cartridge capable of effectively preventing the photosensitive recording medium from being exposed by appropriately shielding light between the cartridge body and the light shielding plate. There is to do.

The above object of the present invention is achieved by the following configurations.
(1) A cartridge main body having at least one internal opening that rotatably accommodates a disc-shaped photosensitive recording medium and exposes the photosensitive recording medium to the outside, a closed position that blocks the internal opening and shields light, and A shutter that is slidable on the outer surface of the cartridge body between an opening position that opens the opening, and an outer opening that is located outside the shutter and at a position opposite to the inner opening, thereby providing a range of movement of the shutter other than the opening. A photosensitive recording medium cartridge comprising a light shielding plate that covers and shields light,
In the range of the opening, the distance between the light shielding plate and the light shielding plate facing surface of the cartridge main body is substantially the same as the thickness of the shutter, and the distance between the light shielding plate and the light shielding plate facing surface of the cartridge main body. Is a cartridge for a photosensitive recording medium having a shape that gradually narrows from the shutter opening direction side edge of the cartridge body toward the shutter opening direction side edge of the opening and connects to the opening range.

  With the above configuration, when the shutter is in the closed position, the shutter contacts the light shielding plate and the cartridge body in close contact with each other to close the opening, thereby further strengthening the light shielding state.

  (2) The light shielding plate is parallel to the outer surface of the cartridge main body in the range of the opening, and from the disk toward the shutter opening direction side edge position of the cartridge main body from the shutter opening direction side edge position of the opening. The photosensitive recording medium cartridge according to (1), wherein the cartridge is provided with an inclined surface in a direction away from the cartridge and provides a gap with the shutter.

  (3) The light shielding plate facing surface of the cartridge main body is parallel to the outer surface of the cartridge main body in the range of the opening, and from the shutter opening direction side edge position of the opening to the shutter opening direction side edge position of the cartridge main body. The photosensitive recording medium cartridge according to any one of (1) and (2), wherein the cartridge is provided with an inclined surface approaching toward the disk toward the disk and providing a gap with the shutter.

  In the cartridge, it is preferable that the light shielding plate is installed in a recess provided on an outer surface of the cartridge body. With this configuration, it is possible to improve the light shielding property without changing the appearance of the cartridge.

  In addition, the cartridge main body is preferably subjected to mat processing or embossing with a surface roughness Ra of 5 to 20 μm on the inner surface with respect to the photosensitive recording medium and the outer surface with respect to the shutter. In this case, even when light enters the inside of the cartridge or between the cartridge main body and the shutter, the light can be diffused and attenuated by the rough surface, so that the influence on the photosensitive recording medium can be reduced.

  The cartridge body includes a plate-shaped first shell and a second shell that is overlapped and welded to the first shell, and the first shell and the second shell are formed of the same or similar thermoplastic plastic. The other components including the shutter are preferably formed of a material different from that of the first shell and the second shell. Thereby, it can prevent that the 1st shell, the 2nd shell, and other components will weld at the time of welding with the 1st shell and the 2nd shell.

  In the cartridge, it is preferable that 0.01 to 5.00% by weight of a light-shielding substance is added to the plastic used for molding the first shell and the second shell, and the shutter. Moreover, when using carbon black for the plastic used for the molding of the first shell, the second shell, and the shutter, it is preferable that 0.01 to 2.00% by weight of carbon black is added. In this way, the light transmittance between the cartridge main body and the shutter can be reduced, and the light shielding performance of the cartridge can be improved.

  In the cartridge, the first shell and the second shell, and the shutter are preferably added with 0.1 to 5.0% by weight of a silicone lubricant in the plastic used for molding. By doing so, the operation of the shutter becomes smooth, so that it is possible to prevent generation of shavings or the like due to friction between the shutter and the cartridge body.

  The cartridge can be applied to a hologram recording medium as the photosensitive recording medium. With the above configuration, the hologram recording medium can be carried without being exposed to light, and can be used in recording apparatuses having different installation positions.

  According to the present invention, the light shielding and dustproof effect of a photosensitive recording medium such as a hologram recording medium is increased by appropriately shielding light between the cartridge body and the light shielding plate, and it is effective for the photosensitive recording medium to be exposed. It is possible to provide a cartridge that can be prevented.

Embodiments of a hologram recording medium cartridge according to the present invention will be described below in detail with reference to the accompanying drawings.
1 to 3 are a perspective view and an exploded perspective view showing an external shape of a hologram recording medium cartridge (hereinafter referred to as a cartridge) 1 according to an embodiment of the present invention. Specifically, FIG. 1 is a perspective view showing a state where the shutter of the cartridge 2 is closed, FIG. 2 is a perspective view showing a state where the shutter 13 of the cartridge 2 is opened, and FIG. 3 is a cartridge body 11 constituting the cartridge 2. 2 is an exploded perspective view showing a light-shielding plate 12, a shutter 14, and a disc-shaped hologram recording medium 4 in a disc housing portion 3. FIG.

  The cartridge according to the present embodiment includes a cartridge main body 11 provided with a disk accommodating portion 3 for accommodating a hologram recording medium (hereinafter referred to as a recording disk) 4 inside, and a light shield attached so as to sandwich the cartridge main body 11 from the outside. A plate 12 and a shutter 13 incorporated between the cartridge body 11 and the light shielding plate 12 are provided. Although not shown, the cartridge 2 is inserted along the loading direction C into a cartridge slot provided in a recording device that records data on the recording disk 4 or a reproducing device that reads data from the recording disk 4.

  The cartridge 2 is provided with a positioning groove 7 into which a positioning member provided in each device is inserted when the cartridge 2 is loaded in various devices such as a hologram recording device. The lock mechanism 27 is released, and the shutter 13 is moved to the open position by the slide mechanism (moving the shutter 13 between the closed position and the open position) of the recording apparatus or the reproduction apparatus, and the openings 14 and 15 arranged as described later. , 18, 19 are opened.

  The recording disk 4 is formed in a disk shape with a hole in the center, and is provided with a hologram recording layer made of a photosensitive material on both sides to constitute a photosensitive recording medium. For example, data is multilayer-recorded on the hologram recording layer as laser light interference fringes by laser light in a wavelength range of green 532 nm to blue 405 nm. A reinforcing material may be added to the central hole of the recording disk 4.

Next, the cartridge main body 11, the light shielding plate 12, and the shutter 13 will be described in detail.
(I) About the cartridge body 11:
First, as can be seen from FIG. 3, the cartridge body 11 includes a first shell 25 formed in a substantially plate shape, a substantially plate-like second shell 26 joined so as to overlap the first shell 25, and a first shell. 25 and a second shell 26, and a lock mechanism 27 that locks the shutter 13 is provided. In the space where the first and second shells 25 and 26 are bonded together, The space which becomes. A disc-shaped recording disc 4 is rotatably accommodated in the disc accommodating portion 3. The recording disk 4 is handled in a state of being accommodated in the cartridge body 11.
The first shell 25 and the second shell 26 are formed by injection molding using, for example, the same or similar thermoplastic plastic to which a light shielding material and a lubricant are added. These types will be described later.

Each of the first shell 25 and the second shell 26 has a substantially tongue-shaped opening 18, which is an internal opening, exposing the rotation center of the recording disk 4 accommodated in the disk accommodating portion 3 and a part of the recording surface to the outside. 19 is opened and arranged in a form penetrating from the first shell 25 to the second shell 26.
Moreover, the outer surface of the 1st shell 25 and the 2nd shell 26 has the recesses 25a and 26a offset from the outer surface, respectively, as shown in FIGS. The shutter 13 is disposed in the recesses 25 a and 26 a, and the light shielding plate 12 is fixedly disposed so as to cover the shutter 13.
The offset surface on which the shutter 13 of the recesses 25a and 26a is disposed is a shutter sliding surface 25b parallel to the outer surface of the cartridge body 11 in the range of the openings 18 and 19, and as shown in FIG. An inclined surface (sliding surface) 25c that approaches the disk 4 direction from the 18 shutter opening direction side edge position 18s toward the shutter opening direction side edge position 11s of the cartridge main body 11 is formed.

(II) About the light shielding plate 12:
FIG. 4 is a perspective view showing the shape of the light shielding plate of the present embodiment. In this figure, the features are emphasized in order to make the present invention easier to understand.
The light shielding plate 12 includes a first plate portion 12a and a second plate portion 12b each having external openings 14 and 15 in an aluminum alloy thin plate, and further, a first plate portion 12a and a second plate portion 12b. And the third plate portion 12c. And as a cross-sectional shape, it is the shape refracted so that a cross section may become a U shape centering on the 3rd board part 12c. A notch 40 for obtaining a moving range of the shutter 13 described later is formed in the closed position side end of the third plate portion 12c while being attached to the cartridge main body 11.

  The light shielding plate 12 sandwiches the first shell 25 and the second shell 26 of the cartridge main body 11 by the first plate portion 12a and the second plate portion 12b, and the cartridge main body by the third plate portion 12c. 11 is attached to the cartridge main body 11 so as to cover the tip in the loading direction C. At this time, the external openings 14 and 15 correspond to the internal openings 18 and 19 provided in the first shell 25 and the second shell 26, respectively.

  Here, the first plate portion 12 a is substantially parallel to the outer surface of the cartridge body 11 in the range of the external opening 14, and the opening direction of the first plate portion 12 a from the shutter opening direction side edge position 14 s of the external opening 14. The range toward the side end portion 12 s is an inclined surface that is separated from the disk 4. Accordingly, the shape of the third plate portion 12c corresponds to this, and until the range of the external opening 14, the distance between the first plate portion 12a and the second plate portion 12b is the end portion on the notch 40 side. It is a uniform interval of the interval h1 at 12r. Then, the shutter opening direction side edge portion 14s opens from the shutter opening position side end portion 12s in the direction away from the disk 4, and the distance between the first plate portion 12a and the second plate portion 12b is h2.

  In the cartridge body 11, the edge portion 25 t opposite to the cartridge insertion side of the recess 25 a corresponds to a partially inclined shape on the free end 12 t side of the light shielding plate 12, from the opening position side edge portion 25 s to the opening 18. In the shutter opening direction side edge position 18s, the inclination approaches the disk 4 and increases in depth, and in the range of the opening 18, the outer surface of the cartridge body 11 is substantially parallel.

With such a configuration, when the light shielding plate 12 is attached to the cartridge body 11, the first plate portion 12 a is opened from the opening position side end portion 12 s to the shutter opening direction of the external opening 14 at a position relative to the recess 25 a. A shape that descends toward the side edge portion position 14s, that is, a configuration in which the distance between the first plate portion 12a and the bottom surface of the recess 25a gradually decreases toward the shutter opening direction side edge portion of the external opening 14 and the internal opening 18. Thus, the outer openings 14 and the inner openings 18 have a uniform interval. Here, the distance between the second plate portion 12 b and the bottom surface of the recess 26 a is constant and substantially parallel to the outer surface of the cartridge body 11.
The cartridge body 11 is most preferably inclined so as not to protrude from the outer surface of the cartridge body 11 at any position on the light shielding plate 12.

  Here, as the material of the light shielding plate 12, for example, an aluminum alloy is used as a material that can obtain light shielding properties, corrosion resistance, decorative properties, and workability, and is lightweight and strong. The light shielding plate 12 may also be formed of plastic. However, in order to ensure the light shielding property and the sliding property with respect to the shutter 13, a plastic to which a light shielding material and a lubricant are added may be used. Further, as a method for fixing the light shielding plate 12 to the cartridge main body 11, it is possible to weld an end portion of a pin that is integrally inserted into both, an adhesive, a double-sided tape, screwing, or the like. Similarly to the cartridge body 11, when the light shielding plate 12 is made of plastic, various types of welding can be used.

(III) Shutter 13:
A shutter according to an embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3.
As shown in FIG. 3, the shutter 13 includes a shutter member 55 having a shape obtained by bending a light-shielding plate so as to be substantially U-shaped, and a slide member 56 attached to the shutter member 55. . The substantially U-shape is composed of a plate-like first shutter 55a, a plate-like second shutter 55b, and a continuous portion 55c that connects these two plates and becomes the center of the U-shape. .

  As the shutter member 55, for example, an aluminum alloy is used as a material that can obtain light shielding properties, corrosion resistance, decorative properties, and workability, and is lightweight and strong. The light shielding plate 12 may also be formed of plastic. However, in order to ensure the light shielding property and the sliding property with respect to the shutter 13, a plastic to which a light shielding material and a lubricant are added may be used.

  Here, the plate-like first shutter 55a is located further inside than the edges 25r, 25s, and 25t to which the light shielding plate 12 is attached, in the recess 25a between the outer surface of the first shell 25 and the light shielding plate 12. It is disposed on the shutter sliding surface 25b, which is the offset bottom surface. Similarly, the plate-like second shutter 55b is located further inside than the edges 26r, 26s, and 26t to which the light shielding plate 12 is attached in the recess 26a between the outer surface of the second shell 26 and the light shielding plate 12. It is disposed on the shutter sliding surface 26b which is the offset bottom surface. Therefore, the connecting portion 55 c is positioned between the light shielding plate 12 and the cartridge body 11 inside the third plate portion 12 c. The continuous portion 55c has a substantially rectangular dimension, and keeps the distance between the first shutter 55a and the second shutter 55b constant.

In the closed position of the shutter 13, the first shutter 55 a enters between the external opening 14 of the cartridge body 11 and the internal opening 18 of the first shell 25, and the external opening 15 and the internal opening 19 of the second shell 26 are in contact with each other. The second shutter 55b enters in between to close the opening and maintain the light shielding state.
Here, the elastic force is constantly urged toward the closed position by the built-in shutter spring 59. Therefore, the first and second shutters 55a and 55b are normally in the closed position, and are locked in the closed position by the lock mechanism 27 of the cartridge body 11.

  Here, a slide member 56 is attached to the plate portion 12c, and is slidably incorporated between the first shell 25 and the second shell 26 so that the upper surface is exposed from the front end surface of the cartridge body 11 in the loading direction. . An attachment surface 56a attached to the inner surface of the continuous portion 55c of the shutter member 55 is provided at the upper end portion of the slide member 56, and is attached integrally to the shutter member 55 by pins, screws, adhesives, or the like.

  On the other upper surface end portion of the slide member 56, an operated portion 56d that is operated when the shutter 13 is opened is integrally formed. The operated portion 56d is provided to the shutter member 55 with the slide member 56 extended in the shutter closing direction, and is exposed to the outside without being hidden by the third plate portion 12c of the light shielding plate 12. Further, as shown in FIG. 2, the notch 40 of the light shielding plate 12 is provided to avoid interference with the operated portion 56d when the shutter 13 is moved to the open position.

  As described above, the shutter 13 is urged in the closing direction by the shutter spring 59, and the shutter spring 59 is formed of a torsion coil or the like, and both ends thereof are the open position side end of the slide member 56 and the inner surface of the first shell 25. And locked.

  The lock mechanism 27 is engaged with the locked groove 56e of the slide member 56 to hold the shutter 13 in the closed position, and a second lock that restricts the movement of the first lock member 63. The member 64 includes a member 64 and a lock spring 65 that urges the second lock member 64 in the locking direction.

FIG. 5 is a perspective view of a cartridge receiving portion and a cartridge of a recording apparatus or reproducing apparatus (not shown). Next, the operation when the cartridge 2 is loaded will be described with reference to FIG.
This recording apparatus or reproducing apparatus includes, for example, a pair of positioning members 77a and 77b, an unlocking mechanism 78 that operates the first locking member 63, and a shutter that slides the shutter 13 between an open position and a closed position. A slide mechanism 80 is incorporated. Among these, the positioning members 77a and 77 engage with the positioning grooves 7 and 8 of the loaded cartridge body 11, and the cartridge body 11 is moved in the insertion direction D of the cartridge 2 and the opening / closing direction C perpendicular to the insertion direction D. Position it.

  Therefore, when the cartridge body 11 is loaded into the hologram recording device or the reproducing device, the positioning member 77a is inserted into the positioning groove 7. Further, an engagement pin 79 a of an unlocking mechanism 78 provided in the recording device or the reproducing device is inserted into the operation hole 72 of the first lock member 63, and the operation piece 80 a of the shutter slide mechanism 80 is placed outside the slide member 56. It will be in an arranged state. The positioning member 77 a further pushes the second lock member 64 against the urging force of the lock spring 65. Thereby, the 2nd lock member 64 rotates in the predetermined direction, and the locked state of the 1st lock member 63 is cancelled | released.

  Next, the lock release mechanism 78 slides the engagement pin 79a in the release direction opposite to the cartridge insertion direction C to release the engagement with the slide member 56. Thereafter, the slide mechanism 80 slides the operation piece 81 in the opening direction D on the left side in the drawing, whereby the shutter 13 is opened. Thus, since the lock mechanism 27 is not released unless the second lock member 64 is rotated and the first lock member 63 is further slid, the shutter 13 is effectively prevented from being inadvertently opened. it can.

6A is a cross-sectional view of the shutter closing position of the cartridge of the present embodiment, and FIG. 6B is a cross-sectional view of the shutter opening position of the cartridge of the present embodiment. Next, the operation of the shutter 13 of the cartridge 2 according to the present embodiment will be described with reference to FIG.
As shown in FIG. 6A, when the shutter 13 is in the closed position and the opening is closed, the cartridge 1 is loaded into a recording apparatus or reproducing apparatus not shown. Then, as described in FIG. 5, the shutter 13 is moved to the open position shown in FIG. 6B by the lock release mechanism 78 and the shutter slide mechanism 80. As a result, the external openings 14 and 15 of the light shielding plate 12 and the internal openings 18 and 19 of the cartridge body 11 are opened, and the hologram recording layer of the recording disk 4 is exposed.

  When the cartridge 2 is taken out, the shutter 13 is moved from the open position shown in FIG. 6B toward the closed position shown in FIG. 6A by the lock release mechanism 78 and the shutter slide mechanism 80. At this time, the first shutter 55a is urged toward the closing side by the elastic force of the shutter spring 59, and along each inclination between the back surface of the light shielding plate 12 and the inclined surface 25c of the first shell 25, the external opening 14 and the internal Each opening 18 is guided to the gap between the shutter opening direction side edge portions 14s and 18s. And after that, it enters the range of the external opening 14 and the internal opening 18 set at a constant interval. By setting the gap between the shutter opening direction side edges 14 s and 18 s (which is also the distance between the outer opening 14 and the inner opening 18) to be approximately the thickness of the first shell 25, a slight pressure is applied to the contact state. Can be accompanied. With such a setting, the light shielding plate 12, the shutter 13, and the shutter sliding surface 25b can be brought into close contact with each other in the closed position, and the light shielding and dustproof state can be strengthened.

  Regarding the optimization of the distance between the back surface of the light shielding plate 12 and the shutter sliding surface 25b of the first shell 25, the height of the edge 25r of the recess 25a, which is the mounting portion of the light shielding plate 12, and the shutter sliding surface 25b. This is achieved by making the closed position side end 55r of the shutter 13 substantially the same.

  As described above, the shutter 13 is locked at the closed position by the lock mechanism 27 that is not released unless the two-step operation is performed by the first and second lock members 63 and 64 when not in use. And will not be opened inadvertently.

  Further, the inner and outer surfaces of the first and second shutters 55a and 55b, which are sliding surfaces of the shutter 4, are roughened in order to avoid entering the inside of the cartridge body 11 by diffusing the incident light. Is preferable. Further, similarly, the remaining outer surface of the light shielding plate 12 and each outer surface of the slide member 56 are preferably roughened.

  In the above embodiment, the shutter sliding surface is kept parallel to the outer surface of the cartridge main body in the recess of the cartridge main body, and the interval thereof is substantially the same as the thickness of the shutter, thereby eliminating the gap portion and enhancing the light shielding and dustproof effect. .

  As described above, according to the present embodiment, the shutter 13 is merely slid to the closed position as described above, and the shutter spring 59 is used to move the light shielding plate, the shutter, and the shutter sliding surface within the recess of the cartridge body. The degree of adhesion can be increased and the closed state is maintained. As a result, it is possible to reliably shield and prevent the storage portion of the cartridge main body 11 in which the recording disk 4 is stored. For this reason, when the cartridge is taken out from the recording device or the reproducing device, the hologram recording layer of the recording disk 4 accommodated therein is not exposed, and a reliable and smooth taking-out operation can be performed. .

In addition, this invention is not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.
Further, although the cartridge for accommodating the hologram recording medium has been described as an example, the present invention can be applied to a cartridge for accommodating other photosensitive recording media.

  The cartridge of the present invention has an effect of appropriately shielding light between the cartridge main body and the light-shielding plate, and can hold the photosensitive recording medium in a clean state without exposing it, and records data by hologram. It is useful for a cartridge for a photosensitive recording medium that accommodates a photosensitive recording medium such as a hologram recording medium.

Next, examples of the present invention will be described.
The thermoplastics used to mold the upper and lower shells include PBT, ABS, POM, PS, PP, HDPE, PA, PET, PPS, SAN (styrene-acrylonitrile copolymer), PMMA, PC, etc. Can be used. In addition, in order to prevent erroneous welding due to ultrasonic welding, it is preferable to select a part other than the upper shell and the lower shell from the thermoplastics described above for parts other than the upper shell and the lower shell. .

  For the upper shell and the lower shell, a light-shielding plastic having a visible light transmittance of 1.0% or less at a thickness of 0.2 mm is used. It is preferable to form in the range of 2-1.6 mm. In order to obtain the light-shielding plastic, a light-shielding substance is preferably added. Various materials can be used as the light shielding material, and it is preferable to add 0.01 to 5.00% by weight depending on the light shielding material to be used. Examples of the light shielding material include the following.

(1) Inorganic compound A. Oxides: silica, diatomaceous earth, alumina, titanium oxide, iron oxide (iron black), zinc oxide, magnesium oxide, antimony oxide, barium ferrite, strontium ferrite, beryllium oxide, pumice, pumice balloon, alumina fiber, etc. B . Hydroxides: aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, etc. Carbonate: calcium carbonate, magnesium carbonate, dolomite, dosonite, etc. (Sulfur) sulfate, ... calcium sulfate, barium sulfate, ammonium sulfate, calcium sulfite, etc. Silicates: talc, clay, mica, asbestos, glass fiber, glass balloon, glass beads, calcium silicate, montmorillonite, bentonite, etc. Carbon, carbon black, graphite, carbon fiber, carbon hollow sphere, etc. Others: Iron powder, copper powder, lead powder, aluminum powder, molybdenum sulfide, poron fiber, silicon carbide fiber, brass fiber, potassium titanate, lead zirconate titanate, zinc borate, barium metaborate, calcium borate , Sodium borate, aluminum paste, talc, etc. (2) organic compound wood flour (pine, straw, sawtooth, etc.), cereal fiber (almond, peanut, fir shell, etc.), cotton, jute, paper strip, non-wood fiber ( Straw, kenaf, bamboo, esparto, pagas, moroheiya, fireworks, etc.), cellophane pieces, nylon fiber, polypropylene fiber, starch (including modified starch, surface-treated starch), aromatic polyamide fiber, etc.

  Among these light-shielding substances, inorganic compounds that are less likely to adversely affect photographic properties and are heat-stable and opaque even at 150 ° C. or higher are preferable. Particularly, substances that have excellent heat resistance and light resistance and are relatively inert. The light-absorbing carbon black, titanium nitride, graphite and iron black are preferred.

  When carbon black is used as the light-shielding substance, the amount added is preferably 0.01 to 2.00% by weight. As described above, this is to obtain a plastic having a good balance between light shielding properties and physical strength.

  Examples of classification by carbon black raw material include gas black, furnace black, channel black, anthracene black, acetylene black, ketjen carbon black, thermal black, lamp black, oil smoke, pine smoke, animal black, vegetable black, etc. .

  Typical examples of commercially available carbon Bragg products include, for example, carbon blacks # 20 (B), # 30 (B), # 33 (B), # 40 (B), # 41 (B), # manufactured by Mitsubishi Kasei. 44 (B), # 45 (B), # 50, # 55, # 100, # 600, # 950, # 1000, # 2000 (B), # 2400 (B), MA8, MA100, and the like. Also, various grades such as Denka Black made by Electrochemical Co., Ltd., Tokai Carbon Seed, Asahi Carbon Asahi # 78, Showa Cabnet Showa Black, Nippon Steel Chemical Niteron, Mitsubishi Chemical Diamond Black, etc. can be used.

  Examples of overseas products include Black Pearls 2, 46, 70, 71, 74, 80, 81, 607, etc., Regal 1300, 330, 400, 660, 991, SRF-S, Vulcan 3, 6, etc. Examples include Steering 10, SO, V, S, FT-FF, MT-FF, and the like.

  Further examples include United R, BB, 15, 102, 3001, 3004, 3006, 3007, 3008, 3009, 3011, 3012, XC-3016, XC-3017, 3020, etc., manufactured by Ashland Chemical. Is not limited to these.

  In addition, as a lubricant to be added to the upper shell, the lower shell, and the shutter, a silicone-based lubricant, particularly various grades of dimethylpolyoxane can be used. Toray, Dow Corning, Silicone, GE Toshiba Silicone, Asahi Kasei Various grades commercially available from Wacker Silicone, Shin-Etsu Chemical, etc. can be used. Both master batches and kneaded products can be used. The addition amount of the silicone lubricant is preferably 0.1 to 5.0% by weight. As described above, this is to obtain a plastic having a good balance between frictional resistance, product quality, and manufacturing suitability.

  Further, if the surface roughness Ra is 5 μm or less as the rough surface provided on the shell, the light diffusion effect is thin, and if it is 20 μm or more, the contact surface with the recording disk may be damaged. For this reason, mat processing or embossing with a surface roughness Ra of 5 to 20 μm is preferable.

  Further, although ultrasonic welding is used for fixing the upper shell and the lower shell, other welding methods and fixing methods may be used. For example, when fixing with a screw or the like, it is preferable to form a light shielding structure around the screw hole.

It is a perspective view which shows the external appearance shape of the cartridge which is embodiment of this invention. It is an external appearance perspective view which shows the shutter open state of the cartridge which is embodiment of this invention. It is a disassembled perspective view which shows the structure of the cartridge which is embodiment of this invention. (A) is a perspective view which shows the shape of the light-shielding plate of this embodiment. It is explanatory drawing which shows an example of the various mechanisms for opening the shutter of a cartridge. 4A and 4B are cross-sectional views in a direction orthogonal to the cartridge loading direction, where FIG. 5A shows a state where the shutter is closed, and FIG. 5B shows a state where the shutter is opened.

Explanation of symbols

2 Cartridge 3 Disc accommodating portion 4 Recording disc 7, 8 Positioning groove 11 Cartridge body 12 Light shielding plate 13 Shutter 14, 15 External opening 18, 19 Internal opening 14s, 18s Shutter opening direction side edge 25a, 26a Recess 27 Lock mechanism 55 Shutter member 56 Slide member C Insertion direction D Opening and closing direction

Claims (10)

A cartridge main body having at least one internal opening that rotatably accommodates a disc-shaped photosensitive recording medium and exposes the photosensitive recording medium to the outside, a closed position that blocks the internal opening and shields light, and the opening is opened. A shutter that is slidably movable on the outer surface of the cartridge body between the open position and the open position, and has an external opening on the outside of the shutter and at a position opposite to the internal opening to cover the moving range of the shutter other than the opening and shield the light. A photosensitive recording medium cartridge comprising a light shielding plate,
In the range of the opening, the distance between the light shielding plate and the light shielding plate facing surface of the cartridge main body is substantially the same as the thickness of the shutter, and the distance between the light shielding plate and the light shielding plate facing surface of the cartridge main body. Is a cartridge for a photosensitive recording medium having a shape that gradually narrows from the shutter opening direction side edge of the cartridge body toward the shutter opening direction side edge of the opening and connects to the opening range.   The light-shielding plate is parallel to the outer surface of the cartridge body in the range of the opening, and is away from the disk from the shutter opening direction side edge position of the opening toward the shutter opening direction side edge position of the cartridge body. The photosensitive recording medium cartridge according to claim 1, further comprising an inclined surface and providing a gap with the shutter.   The light shielding plate facing surface of the cartridge main body is parallel to the outer surface of the cartridge main body in the range of the opening, and the opening direction side edge position of the opening of the cartridge body toward the shutter opening direction side edge position of the cartridge main body. The photosensitive recording medium cartridge according to claim 1, further comprising an inclined surface that approaches the disk direction, and a gap with the shutter.   The photosensitive recording medium cartridge according to any one of claims 1 to 3, wherein the light shielding plate is disposed within the outer surface within a recess provided on the outer surface of the cartridge body.   2. The cartridge body according to claim 1, wherein the inner surface with respect to the photosensitive recording medium and the outer surface with respect to the shutter are subjected to mat processing or embossing with a surface roughness Ra of 5 to 20 [mu] m. 5. The photosensitive recording medium cartridge according to any one of 4 above.   The cartridge body includes a substantially plate-shaped first shell and a second shell that is overlapped and welded to the first shell, and the first shell and the second shell are formed of the same or similar thermoplastic plastic. The other components including the shutter are formed of a material different from that of the first shell and the second shell. 6. The photosensitive recording medium according to claim 1, wherein the first shell and the second shell are formed of a different material. cartridge.   7. The first shell, the second shell, and the shutter, wherein a light shielding material is added in an amount of 0.01 to 5.00% by weight to plastic used for molding the shutter. The cartridge for photosensitive recording media as described in one.   8. The first shell, the second shell, and the shutter, wherein 0.01 to 2.00% by weight of carbon black is added to plastic used for molding the shutter. The cartridge for photosensitive recording media described in 1.   9. The first shell, the second shell, and the shutter, wherein a silicone lubricant is added to a plastic used for molding in an amount of 0.1 to 5.0% by weight. The cartridge for photosensitive recording media as described in one.   The photosensitive recording medium cartridge according to claim 1, wherein the photosensitive recording medium is a hologram recording medium.

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