JP3690055B2 - Disc cartridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk cartridge that opens and closes an opening of a shell by sliding a shutter, and in particular, is provided with a display portion for a manufacturer name or a product name on the surface of the shutter.
[0002]
[Prior art]
For example, a disk cartridge shown in FIG. 12 is known as a disk cartridge having a shutter made of a metal plate and opening and closing the opening of the shell with the shutter.
[0003]
The disc cartridge 101 is a disc 102 as a recording medium, a shell 103 that rotatably accommodates the disc 102, and a slidably attached to the shell 103, and opens and closes an opening 104 provided in the shell 103. And a shutter 105.
[0004]
The shutter 105 is formed by bending a metal plate such as SUS into a U-shape, and a display unit 106 for characters and figures such as manufacturer names and product names is provided on the surface thereof.
[0005]
The display unit 106 is generally formed by printing UV (ultraviolet) curable ink on the surface of the shutter 105 with a printing machine and then curing the UV curable ink with a curing device having an ultraviolet lamp.
[0006]
[Problems to be solved by the invention]
In the conventional disk cartridge, as described above, UV curable ink or the like is printed on the surface of the shutter 105 and then cured by a curing device to form a display unit 106 such as a manufacturer name or product name. Therefore, there were the following problems.
[0007]
(1) In order to form the display unit 106, a large facility such as a printing machine or a curing device is required.
[0008]
(2) Since a printing process, a curing process, and the like are required, the manufacturing process becomes complicated, the productivity is reduced, and the cost is increased.
[0009]
(3) In order to print on the surface of the shutter 105, it is necessary to clean the surface. For this reason, conventionally, the surface of the shutter has been cleaned using an organic solvent, a detergent or the like, but the use of the organic solvent is not desirable from the standpoint of protecting the global environment. Moreover, the same problem is caused by using a large amount of water in cleaning with a detergent or the like.
[0010]
According to the present invention, the surface of the shutter is deformed under pressure so that characters, figures, etc. are exposed, and a display unit for characters, figures, etc. can be formed without using UV curable ink, etc. In particular, the amount of deformation of the display unit is increased to make it easier to see characters and graphics on the display unit, and the lower surface of the display unit is prevented from coming into contact with the shutter surface and damaging the surface. It is something that can be done.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a disk as a recording medium, a shell that rotatably accommodates the disk, and is slidably attached to the shell and provided in the shell. In a disc cartridge comprising a shutter for opening and closing the opening, the shutter is provided with a stepped portion that is kept in a non-contact state with respect to the surface of the shell, and the surface of the stepped portion is deformed under pressure. A character or graphic display part is formed, and the step between the step part and the shell contact part is smaller than the thickness of the shutter, and the display part has a protrusion amount on the lower surface of the display part. The depth is smaller than the step and is 30% or more of the thickness of the shutter.
[0012]
Characters and figures are expressed by the unevenness of the surface of the stepped portion. In particular, since the unevenness is formed on the outer surface of the stepped portion, even when a convex portion is relatively formed on the inner surface of the stepped portion by forming the unevenness on the outer surface of the stepped portion, the protruding portion is changed to the inner surface of the stepped portion. It is possible to prevent the protrusion from coming into contact with the surface of the shell.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, the disk cartridge 1 of the present invention will be described with reference to FIGS. 1 is a perspective view of the disk cartridge 1, FIG. 2 is an exploded perspective view, FIG. 3 is a perspective view of a shutter, and FIG. 4 is a longitudinal sectional view taken along line AA of FIG. The disk cartridge 1 includes a disk 2 as a recording medium, a shell 3 that rotatably accommodates the disk 2, and a slidably attached to the shell 3, and an opening provided in the shell 3. A shutter 4 that opens and closes 33 and the like is provided.
[0014]
The shutter 4 has a step portion 5 that is kept in a non-contact state with respect to the surface of the shell 3, and the outer surface of the step portion 5 is pressed and deformed to be recessed. Thus, a display unit 6 for characters and figures is formed.
[0015]
The step portion 5 is formed in a rectangular shape, and is surrounded by a shell contact portion 7 that contacts the surface of the shell 3.
[0016]
As shown in FIG. 4, the step portion 5 is formed such that a step H between the step contact portion 5 and the shell contact portion 7 is smaller than a plate thickness T of the shutter 4. The display unit 6 is formed at a depth D of 30% to 60% of the plate thickness T of the shutter 4. When the depth D of the display unit 6 is formed to be 30% or more of the plate thickness T of the shutter 4, the lower surface 6a of the display unit 6 protrudes from the lower surface 5a of the stepped portion 5. It is smaller than the level difference H, and the lower surface 6 a of the display unit 6 is not in contact with the surface of the shell 3. The bottom surface of the display unit 6 is formed on a rough surface 8 having a 10-point average roughness (RZ) of 5 μm or more.
[0017]
Next, the disc 2, the shell 3, and the shutter 4 will be described in detail with reference to the exploded perspective view of FIG. The disk 2 includes a disk main body 21 and a chucking hub 22 attached to the center of the disk main body 21.
[0018]
The disk main body 21 is made of a synthetic resin such as polycarbonate, polystyrene, polyolefin, polymethyl methacrylate, norbornene, aluminum or glass, and has a center hole 23 at the center. A recording portion 24 such as a magnetic recording film, a magneto-optical recording film, or an optical recording film is formed on the main surface portion outside the hole 23.
[0019]
The chucking hub 22 is made of a magnetic metal such as iron or stainless steel, and has a spindle shaft insertion hole 25 at the center.
[0020]
The shell 3 is made of a thermoplastic synthetic resin such as ABS or polycarbonate, and is formed in a flat housing shape by joining the lower halves 31 and 32 by ultrasonic welding or the like.
[0021]
The upper half 31 has a recording / reproducing opening 33 at the center on the front end side (front end side in the direction of insertion into the drive device).
[0022]
The lower half 32 has a recording / reproducing opening 34 at a position facing the recording / reproducing opening 33 of the upper half 31, and a circle on the inner peripheral surface (the upper surface in FIG. 2). The shape has a plurality of ribs 35... 35. The ribs 35... 35 form a disk housing portion 36 for rotatably housing the disk 2, and a drive opening 37 is formed at the center of the disk housing portion 36. Then, when the disk 2 is accommodated in the disk accommodating portion 36 and the upper and lower halves 31 and 32 are coupled, the hub 22 of the disk 2 faces the opening 37 for driving the lower half 32, and The upper and lower surfaces of the recording portion 24 of the disk 2 face the recording / reproducing openings 33 and 34 of the upper and lower halves 31 and 32.
[0023]
The shutter 4 is formed by bending an aluminum thin plate into a U shape. The shutter 4 includes first and second shutter plate portions (opening / closing portions) 41 and 42 that are superposed on the outer surfaces of the upper and lower halves 31 and 32, and the first and second shutter plate portions 41 and 42. 42. The second slide guide includes a connecting portion 43 that connects one end of the connecting portion 43, and first and second slide guide portions 44 and 45 that are connected to both ends of the connecting portion 43. The part 45 is provided with a shutter lock member engaging part 46. A shutter lock member 51 is rotatably attached to the lower half 32, and an erroneous erasure preventing member 52 is slidably attached.
[0024]
The step portion 5 is provided on a first shutter plate portion 41 that overlaps the upper half 31. The step portion 5 is formed in a rectangular shape similar to the shutter plate portion 41, and is surrounded by a shell contact portion 7 that makes contact with the surface of the upper half 31 on the four sides.
[0025]
As shown in FIGS. 5 to 6, a pair of cross-section arc-shaped ribs are provided at the end of the first shutter plate 41 of the shutter 4 on the connecting portion 43 side and the end of the front end side (free end side). By forming this as the shell contact portion 7, the entire first shutter plate portion 41 may be the step portion 5.
[0026]
Next, a method for manufacturing the shutter 4 will be briefly described. For manufacturing the shutter 4, the manufacturing apparatus 201 shown in FIG. 7 is used. The manufacturing apparatus 201 includes an original plate delivery device 203 that sends out a shutter plate original fabric 202 wound in a roll shape, and a flat plate by correcting the bending of the plate original fabric 202 that has been delivered by the plate original fabric delivery device 203. Alignment device (leveler) 204 to be used, press device 205 that presses plate raw material 202 corrected by the correction device 204, and shutters 4 ... 4 formed by the press device 205 are aligned and sent out. Device 206. And in the said press apparatus 205, the shutters 4 ... 4 are manufactured from the plate original fabric 202 by performing the 1st-7th process shown in FIG.
[0027]
In the first step, pilot holes 211... 211 and notch holes 213 are formed in the original plate 202 that has been flattened by the straightening device 204 to accurately feed the plate in the press device 205.
[0028]
In the second step, the step portion 5 is formed on the plate original fabric 202. The step portion 5 is formed by denting a part of the plate original fabric 202 into a rectangular shape (protruding toward the upper surface in FIG. 8), or as shown in FIGS. It is formed by bulging a pair of cross-section arc-shaped ribs.
[0029]
In the third step, the outer surface of the step portion 5 is subjected to pressure deformation to form the display portion 6 such as characters and figures.
[0030]
In the fourth step, the first and second shutter plate portions 41 and 42 of the shutter 4, the connecting portion 43, the first and second slide guide portions 44, The part that becomes 45 is punched out.
[0031]
In the fifth step, part of the first and second slide guide portions 44 and 45 are bent at substantially right angles along the folding lines 214 and 215.
[0032]
In the sixth step, a part of the first and second slide guide portions 44 and 45 are bent at substantially right angles along the folding lines 216 and 217.
[0033]
In the seventh step, the first and second shutter plate portions 41 and 42 are bent at substantially right angles along the folding lines 218 and 219.
[0034]
As described above, the shutter 4 formed in a U-shape by bending the first and second shutter plate portions 41 and 42 along the folding lines 218 and 219 is cut at the connection portion 213, and the individual shutters 4. Are aligned by the aligning device 206 and taken out one by one.
[0035]
In the third step, as shown in FIG. 10, a vertical movement punch (upper punch) 221 and a fixed punch 222 disposed below the vertical movement punch 221 are used. The fixed punch 222 has a marking chip 223 at its upper end. The fixed punch 222 is supported at the lower end by a die holder 225 and a die 226 via a height adjusting screw 224, and the height position of the stamped chip 223 can be adjusted by the height adjusting screw 224. It is like that. A plate original fabric support table (operation plate) 227 is disposed on the die 226. The plate original fabric support table 227 has a punch guide 228. By fitting the upper part of the fixed punch 222 into the punch guide 228, the plate original fabric support table 227 can move up and down with respect to the fixed punch 222. 226 is supported by springs 229. The plate original fabric support surface 227a of the plate original fabric support table 227 is positioned above the marking chip 223 and supports the plate original film 202 in a state of being lifted with respect to the marking chip 223. .
[0036]
When the plate original 202 is sent to a predetermined position of the plate original support table 227, the vertical movement punch 221 moves down, and the punch 221 causes the plate original 202 and the plate original support table to move. 227 is pushed down, and the plate original fabric 202 is pressed against the marking chip 223 to be recessed to form the display portion 6 on the surface of the stepped portion 5.
[0037]
FIG. 11 is an enlarged view of the marking chip 223. A marking portion 223a is provided on the top surface of the marking chip 223. The upper surface of the marking part 223a is formed into a rough surface with a 10-point average roughness (RZ) of 5 μm. Then, as described above, when the original plate 202 is pressed against the marking chip 223 by the vertical movement punch 221, the marking portion 223a and the rough surface 223b are transferred to the original plate 202, and as shown in FIG. A portion 6 is formed, and a rough surface 8 is formed on the inner surface of the display portion 6.
[0038]
The original plate 202 is formed by forming an epoxy-based synthetic resin film layer on the surface of an aluminum thin plate to enhance the contact resistance and surface strength, or anodizing the aluminum thin plate. Alternatively, a thin plate made of stainless steel having a surface treatment such as so-called dull processing or hairline processing is used, and its thickness is selected in the range of 0.15 to 0.5 mm depending on the type of the disk cartridge. .
[0039]
The disk cartridge 1 according to the embodiment has the above-described configuration. The shutter 4 is provided with a step portion 5 that is kept in a non-contact state with respect to the surface of the shell 3, and the step portion 5 is recessed to form characters. Since the display part 6 such as a figure or the like is formed, even if the lower surface 6a of the display part 6 protrudes from the lower surface 5a of the step part 5 as shown in FIG. The amount of protrusion of the lower surface 6a of the display unit 6 is absorbed by the gap with the surface, the lower surface 6a is prevented from contacting the surface of the shell 3, and the shutter 4 can be smoothly slid. In the above-described embodiment, the display unit 6 is formed by denting the outer surface of the stepped portion 5. However, the display unit 6 may be formed by protruding the outer surface of the stepped portion 5.
[0040]
【The invention's effect】
The disk cartridge of the present invention has the following effects.
[0041]
(1) Since the disk cartridge according to the first aspect is formed by pressurizing and deforming the surface of the shutter, the display unit for characters and figures on the surface of the shutter is printed, and the conventional UV ink is printed and cured. The display can be formed easily and cheaply compared with the case of forming the part (no need for large equipment such as a printing machine or curing device, and no cleaning work with organic solvent or detergent for printing) And environmental hygiene is also advantageous). In particular, a step portion that is kept in a non-contact state with respect to the surface of the shell is provided, a display portion is formed on the step portion, and the step between the step portion and the shell contact portion is determined by the thickness of the shutter. Since the protrusion of the lower surface of the display unit is smaller than the step and formed to a depth of 30% or more of the thickness of the shutter, the display unit is formed at the time of forming the display unit. Even when the lower surface protrudes to the shell side, contact with the surface of the shell can be prevented, and the stepped portion can be prevented from becoming an obstacle when the disk cartridge is inserted into the drive device, and the shutter slides smoothly. And the visibility of the display unit can be improved by enlarging the dent of the display unit.
[0042]
(2) Since the disk cartridge of the second aspect surrounds the periphery of the stepped portion with the shell contact portion, it prevents dust and the like from entering the gap between the stepped portion and the surface of the shell from the outside. Can do.
[0043]
( 3 ) In the disc cartridge according to the third aspect, since the surface of the display unit is formed to be rough, the display unit is more easily visible due to irregular reflection of light.
[Brief description of the drawings]
FIG. 1 is a perspective view.
FIG. 2 is an exploded perspective view.
FIG. 3 is a perspective view of a shutter.
4 is a cross-sectional view taken along line AA in FIG.
FIG. 5 is a perspective view of a modified example of the shutter.
6 is a cross-sectional view taken along line AA in FIG.
FIG. 7 is a schematic side view of a shutter manufacturing apparatus.
FIG. 8 is a manufacturing process diagram of a shutter.
9 is a cross-sectional view taken along line AA in FIG.
FIG. 10 is a cross-sectional view of a display unit forming apparatus.
FIG. 11 is a cross-sectional view of a stamped chip.
FIG. 12 is a perspective view of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Disc cartridge, 2 ... Disc, 3 ... Shell, 4 ... Shutter, 5 ... Step part, 6 ... Display part, 7 ... Shell contact part, 8 ... Rough surface.

Claims (3)

A disc as a recording medium;
A shell that rotatably accommodates the disk;
A shutter that is slidably attached to the shell, and that opens and closes an opening provided in the shell;
In a disc cartridge with
The shutter is provided with a stepped portion that is kept in a non-contact state with respect to the surface of the shell,
By pressing and deforming the stepped portion, a character or graphic display is formed,
The step between the stepped portion and the shell contact portion is smaller than the thickness of the shutter, and the display portion has a protrusion amount on the lower surface of the display portion that is smaller than the step and is less than the thickness of the shutter. A disc cartridge formed to a depth of 30% or more . In claim 1,
The disc cartridge is characterized in that the step portion is surrounded by a shell contact portion that contacts the surface of the shell. In claim 1,
A disc cartridge characterized in that the surface of the display section is rough.

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