CN1164736A - Disk type recording medium - Google Patents
Disk type recording medium Download PDFInfo
- Publication number
- CN1164736A CN1164736A CN96107396A CN96107396A CN1164736A CN 1164736 A CN1164736 A CN 1164736A CN 96107396 A CN96107396 A CN 96107396A CN 96107396 A CN96107396 A CN 96107396A CN 1164736 A CN1164736 A CN 1164736A
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- China
- Prior art keywords
- disc
- substrate
- shape recoding
- recording medium
- protection
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24047—Substrates
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
Abstract
A recording film is coated and formed on a glass substrate. A protection substrate is adhered to the glass substrate to cover the recording film. A protection rib is formed as a body with the protection substrate so as to face an outer circumference edge of the glass substrate. Since the external shock is not given directly to the glass substrate by the protection rib, the glass substrate 1 can be protected. Thus, the glass substrate would not be cracked or damaged easily.
Description
The present invention relates to a kind of disc-shape recoding medium that is applicable to magneto-optic disk and similar device.
In being used as the optical disc apparatus and similar device of data recording/reproducing apparatus, for example store and handle audiovisual (AV) dish of the audio-visual data information of transmission with a kind of predetermined way, have two types, a kind of is manual type, and user's conversion is as the disc of information recording carrier; Another kind is an automatic type, by the automatic conversion disc of mechanical hook-up.Usually, the latter is a kind of automatic disc converting means that is known as transducer.
Transducer is deposited a plurality of discs (disc of unprotect box).In this transducer, be provided with the disc extraction element,, be sent on the carriage (plate rail) of disk drive, after using up it is regained from plate rail, send back in the box from the box (bin) of depositing a plurality of discs, to extract required disc.
Figure 18 is used for explaining the planimetric map of a kind of disk drive of conversion disc in due form, and Figure 19 is the side view along arrow IX direction.As shown in figure 18, mandrel 72 is contained in the center of the pedestal 71 of disk drive, and in order to drive disc 10 rotations, the turntable of a magnetic card dish type is installed on this mandrel 72.Plate rail 73 is equipped with on both sides at the mandrel 72 that supports disc 10 centers, moves up and down to drive CD.
The plate rail 73 on mandrel 72 both sides has identical structure as shown in figure 19, and each plate rail is all supported by the column 74 that stretches out from pedestal 71.Each plate rail can move along contacting/remove direction (vertical direction among Figure 19) with the vertical disc of the Plane of rotation of disc 10, makes plate rail to upper offset by the thrust of compression spring 75.
These plate rails 73 coincide (seeing the cross-hauling of Figure 18) with the supporting disc with the outer peripheral relative position of disc 10.When plate rail 73 lifts, the disc 10 that supports by plate rail 73 be positioned at mandrel 72 than top, shown in the right half part of Figure 19.When the elastic force that overcomes compression spring 75 when plate rail 73 moved down, plate rail 73 was in the position lower than the disc on turntable 70 10, shown in the left-half of Figure 19.
One block pressur plate 76 is positioned on mandrel 72 and the plate rail 73, and it is covered, and as shown in figure 18, the part of figure center platen 76 is severed.Have the left and right edges part at Figure 18 center platen 76, support, pressing plate 76 is moved along the installation/detaching direction (vertical direction among Figure 19) of disc by a drive unit (not drawing among the figure) by side plate (not drawing among the figure).Push rod 77 is fixed on the position in the face of plate rail 73 of pressing plate 76.When pressing plate 76 moved down, it contacted with plate rail 73, and its elastic force that overcomes compression spring 75 is pushed away downwards.
The dish handle 78 of transducer comprises pair of support rods and four claw type framves (handle frame) 80 in the face of mandrel 72 installations, and each support bar 79 has two fixing handle framves 80.Disc 10 can be placed on four handle framves 80.As shown in figure 20, drive support bar 79, it can be entered in the space between pedestal 71 and the pressing plate 76, withdraw from and move up and down by drive unit (not drawing among the figure).
In this existing apparatus, the disc 10 relative mandrel 72 of mode is as described below changed.For laying disc 10, as shown in figure 20, disc 10 is placed on the handle frame 80 of dish handle 78.Then, disc 10 enters the space between pedestal 71 and the pressing plate 76, i.e. position between plate rail 73 and pressing plate 76, as shown in figure 19.When disc 10 arrived preposition, disc 10 moved down and is placed in the plate rail 73.Remove dish handle 78 (seeing the right half part of Figure 19 and 20) then.
Subsequently, by drive unit pressing plate 76 is moved down, so that push rod 77 is pushed plate rail 73 to lower position.In this process, disc 10 is placed on the mandrel 72 (sees the left-half of Figure 19).By the magnetic card dish type turntable 70 on mandrel 72 CD 10 is blocked.This has just finished the whole process of placing disc 10.
Before withdrawing from disc 10 from turntable 70, pressing plate 76 moves up earlier.When the elastic force of compression spring 75 moved up plate rail 73, the magnetic attraction that plate rail 73 overcomes turntable 70 took off disc 10 from mandrel 72.This information slip is shown in the right half part of Figure 19.Then, dish handle 78 enters space between pedestal 71 and the pressing plate 76 by the lower position opposite with loading procedure.Dish handle 78 moves up, and takes off disc 10 and shifts out from pedestal 71 and the space among the pressing plate 76 with disc 10 from plate rail 73.
With reference to Figure 21 and 22, Figure 22 is the side view of Figure 21, and from Figure 21 and Figure 22 as can be seen, the glass with very little linear expansion coefficient is used as the medium substrate 1 of disc 10.Be formed for the concave (cutting line) of TRAJECTORY CONTROL in two steps in the one side of substrate of glass 1 with thermopolymer, write down the pre-formatting part and the analog of disc supervisory signal, control signal etc. in advance, be coated with redoubling by sputtering method and form as signal record recording film 2 partly.On substrate of glass 1, cover and form protection substrate 3 with bonding agent, in order to protection recording film 2.Label 5 is represented adhesive phase.Chuck shape hub 4 is in the centre of substrate of glass 1, and in the example of accompanying drawing, this hub 4 is assembled into above it towards turntable 70.
In the prior art, be formed on recording film 2 on the substrate of glass 1 as the protection substrate 3 of guard block in order to protection.Because the diameter of protection substrate 3 equals the diameter of substrate of glass 1, so substrate of glass 1 can not be adequately protected.For example, when mobile disc, when the outer rim of substrate of glass 1 was run into fixture, because collision, substrate of glass 1 may be split or because distortion is impaired, consequently can not be re-used.
Therefore, the purpose of this invention is to provide a kind of disc, overcome the above-mentioned defective of prior art, improve substrate outward flange collision protection performance, improve the reliability of disc.
The present invention is a kind of disc-shape recoding medium, and it has a disc-shape recoding medium substrate at least, and its one side is as the signal record part.This disc-shape recoding medium comprises a guard block, and in order to the protection recording section, the peripheral edge portion of relative record medium substrate, this guard block have a peripheral part; A vibrating part is in the outer rim of recording medium substrate and relative with it.
By understanding scope of the present invention with reference to following detailed description.Yet, just preferred embodiment is below described, obviously to one skilled in the art, can make various modification of the present invention and change, it does not exceed spiritual scope of the present invention.
Accompanying drawing with reference to following description and embodiment can be understood the present invention well.Yet these accompanying drawings are only with laying down a definition rather than limiting.In the accompanying drawing:
Fig. 1 is the skeleton view that is used for an embodiment of recording medium of the present invention;
Fig. 2 is the sectional view of Fig. 1;
Fig. 3 represents that the record surface of recording medium touches the synoptic diagram of placed side;
Fig. 4 is the enlarged drawing of A part among Fig. 3;
Fig. 5 is the enlarged drawing of a protection flange part;
Fig. 6 represents the graph of a relation between handle limit frame and the disc;
Fig. 7 represents the graph of a relation between the driver edge frame and disc when disc is correctly placed;
Fig. 8 represents the graph of a relation between the driver edge frame and disc when disc is oppositely placed;
Fig. 9 represents to place not the graph of a relation between driver edge frame and the disc at that time when disc;
Figure 10 represents the circuit diagram of an a kind of embodiment of front/rear determination sensor;
Figure 11 represents the family curve between sensor output and the disc distance;
Figure 12 represents the block scheme of an a kind of embodiment of front/rear mensuration treating apparatus;
Figure 13 is the partial cross section figure of another embodiment of recording medium;
Figure 14 is the partial cross section figure of an additional embodiment of recording medium;
Figure 15 is can be at the partial cross section figure of the recording medium of double-sided recording modes data;
Figure 16 is the partial cross section figure of an embodiment of chuck mode recording medium;
Figure 17 is the part enlarged drawing of Figure 16;
Figure 18 is a kind of planimetric map of major part of disc replay device;
Figure 19 represents that plate rail rises state;
Graph of a relation between Figure 20 indicating panel handle and the driver;
Figure 21 is the stereographic map of recording medium;
Figure 22 is the sectional view of Figure 21.
To go through according to recording medium of the present invention with reference to accompanying drawing, be applied in above-mentioned disc recording/replay device in this present invention.
Fig. 1 is the stereographic map according to an embodiment of recording medium 10 of the present invention.In this embodiment, recording medium 10 is magneto-optic disks.This recording medium is known as a kind of disc.
Fig. 5 has at length represented protection flange 7.As shown in the figure, the outward flange of protection flange 7 comprises that facing part 7a and one directly for one extends the scalene cone part 7b that gets off from facing part 7a directly.Its size depends on handle frame 80 and places relation between the plate rail 73 of disc 10.Scalene cone part 7b is of great use when from metal die it being taken out in the process that forms the protection substrate.In resin forming, at a cavity side formation outside surface 6a of metal die, the hollow parts 6b of formation is as core rod.Form the scalene cone part in core side, the taking-up process from metal die is improved.
When disc 10 took out from bin and puts into bin or be sent to driver, dish handle 78 shown in Figure 180 moved rapidly along the direction of arrow of Figure 20.Like this, disc 10 has a bigger acceleration in handle frame 80 and plate rail 73.
For disc 10, the installation site of handle frame 80 and size thereof should suitably be made following selection, so that the part of facing directly of the inside surface of step part 83 closely contacts with the part 7a that faces directly of protection flange 7.Yet following train value is an embodiment when disc 10 is 8 inches dishes.
The height A of flange 7=2.6 millimeter
Height B=1.1 of the scalene cone part 7b of flange 7 millimeter
The height of facing part 7a directly (A-B)=1.5 of flange 7 millimeter
The height C=2.2 millimeter of step part 83
Therefore, height (length) D of the surface of contact of facing part directly of facing part 7a and step part 83 directly of protection flange 7 is 1.1 millimeters.Because contact height D is equal to or greater than 1 millimeter, so even by the turnover operation of changing dish dish handle 78 is moved and disc 10 is subjected in handle frame 80 along under the situation of the power of arrow P direction rapidly along the direction of arrow P, disc 10 can not deviate from from handle frame 80 yet.Therefore, can carry out stable operation for the high speed turnover of dish handle 78.
Fig. 7 has provided disc 10 and and has been contained in relation between the plate rail 73 on the driver.In the figure, plate rail 73 comprise 87 and one of 86, one bottom flanges of an inside surface tapered segment (flange) above-mentioned between the two face coupling step part 88 directly.The effect of coupling step part 88 is disc 10 is placed on the plate rail 73 rightly and does not rock.Similar with above-mentioned discussion, inside surface tapered segment 86 forms and makes disc 10 remain within the scope of this inside surface tapered segment 86 and fall into step part 88, both made be disc do not send into plate rail 73 rightly also can be like this.
Preferably the thickness E of plate rail 73 is thin as far as possible, so that this device miniaturization.In the present embodiment, the height L of step part 88 elects 1.0 millimeters as.On the other hand, the scalene cone part 7b that is located on the protection flange 7 is of a size of 1.1 millimeters, and does tapered.If the cone angle of scalene cone part 7b is big, or the circularity R of the fillet of oblique cone part 7b part is big, and then the gap width K between disc 10 and the plate rail 73 (surface of the coupling step part 88 of plate rail 73 and the distance of protecting between the flange 7) is also big.Like this, may reduce the location accuracy of disc 10 with respect to turntable 70.
In the embodiment of Fig. 5, the maximum cone angle of scalene cone part 7b is 1.0 degree, and the size G of fillet part R is less than 0.2 millimeter.Because these values are chosen, so the gap K of disc 10 is very little, and make its location easily.
Referring to Fig. 7, be equipped with an opening 89 in the pre-determined bit of bottom flange 87, a sensor 90 is wherein arranged in order to determine the front-back of disc 10.Front/rear face sensor 90 can be a reflection type optical sensor.
According to the light reflectivity that is contained in the disc 10 on the plate rail 73, front/rear definite sensor 90 determined the front-back of disc 10, because the reflection of the light of disc front is different from the light reflection at its back side.In the present embodiment, from the reflective light intensity of substrate of glass 1, and a little less than the reflected light from protection substrate 6.Because the reflectivity of substrate of glass 1 is very high, so need not do special processing.Yet protection substrate 6 should be done following processing so that reflected light dies down.
The host material of protection substrate 6 is polycarbonate resin and is black.As shown in Figure 5, by wiper polishing (scratch-brush finish) the outside surface 6a of protection substrate 6 is handled and make it become coarse.Available for example # 80 sand blasting sand technology (blast process) is finished rubbing down.Wiper polishing (rubbing down) can be used for part or all of surface.Treatment surface should be the surface (endless belt face) of the disc 10 that detection luminous energy is mapped to when disc 10 correct placements.If the processing all surface then all carries out the wiper polishing except that outermost edge zone 6c (the actual width that equals flange 7).If regional 6c also carries out the wiper polishing in outermost edge, the intersection burr will be arranged on this area surface, this just needs to remove the intersection burr.Yet the width of outermost edge zone 6c is preferably narrow as much as possible.Too wide when the width of outermost edge zone 6c, correct even disc 10 is placed, light also may be accepted to survey in this zone.This detection that just may lead to errors.
As shown in Figure 7, even disc 10 and plate rail 73 gapped K are surveyed the inboard that light also should be mapped to outermost edge zone 6c.For this reason, front/rear acquisition sensor 90 need be contained in edge surface from the inside surface of step part 88 to substrate of glass 1 apart from M more by the position of lining, as shown in Figure 7.
Front/rear definite sensor 90 is not that to be placed on any position by the lining all suitable.Its position should be chosen in as close as possible position apart from M, thereby, when owing to tiltedly put and also this incorrect placement can be detected when making disc 10 go on the plate rail 73, as shown in Figure 9.
When disc 10 was placed on as shown in Figure 7 the tram, a side of substrate of glass 1 was to front/rear definite sensor 90, and the reflected light that detects is very strong.If it is suitable that disc 10 is placed, but make protection substrate 6 in the face of sensor 90 owing to putting back, as shown in Figure 8, reflected light is very weak.Like this, can determine front and rear surfaces by surveying catoptrical intensity.
When substrate of glass 1 side down, but disc 10 is placed and when incorrect, as shown in Figure 9, end this moment flange 87 contacts with the disc edge surface, another edge surface of disc has striden across the inside surface tapered segment 86 of another plate rail 73.In this case, disc 10 has ridden on the plate rail 73, and its side-play amount is greater than the width (being approximately 5 millimeters in this device) of the inside surface tapered segment 86 of plate rail 73, and front/rear definite sensor places outside the disc 10, as shown in Figure 9.In this example, the definite sensor of front/rear on the plate rail 73 is surveyed less than reflected light, as shown in Figure 9.Because in fact another front/rear determination sensor 90 surveyed less than reflected light, because its luminous value is very little, so can detect this incorrect placement situation by the output of monitoring sensor.
Front/rear definite sensor 90 that Figure 10 provides is an embodiment of reflection sensor.In Figure 10, optical transmitting set can be a light emitting diode 91, and optical receiver can be a photistor 94.Driving voltage is added to light emitting diode 91 by resistance 92.Similarly, this driving voltage is added to photistor 94 by resistance 93.Resistance 93 is output terminal 95 with the common node q of photistor 94.
Place correctly when disc 10, substrate of glass 1 is towards sensor 1, and is very strong from the reflected light of disc 10 as shown in Figure 9, mensuration output (sensor output) very little (referring to curve La of Figure 11) of output terminal 95.If disc 10 is oppositely placed, as shown in Figure 8, reflected light is very weak, the sensor output very big (referring to the curve Lb of Figure 11) of output terminal 95.Sensor output when disc does not place among Fig. 9 is than the output of the sensor among Fig. 8 also big (about 5V is referring to the curve Lc of Figure 11).Measure the incorrect placement of front and back placement and disc according to various sensor output levels.
Figure 11 has provided the sensor output level and sensor 90 is determined to the relation between the distance of disc 10 in the past/back, and when this distance was 1 to 3 millimeter, sensor output was the most stable.Therefore, when disc 10 correctly was placed on the plate rail 73, it approximately remained on 1 millimeter from the distance of front/rear definite sensor 90.In the present embodiment, front/rear definite sensor 90 is installed in the position that is lower than bottom flange 87 surfaces, as shown in Figure 7.Front/rear definite sensor 90 is fixed on the installing plate 96.
Sensor has just been started working before disc 10 is placed on the plate rail 73 fully, confirms the front-back of disc at once.For example, working sensor regularly is being moved downward to be during bottom flange 87 about 2 millimeters away from when disc.
Figure 12 is an embodiment who determines the treating apparatus of front and back state or incorrect laying state.Because driver has a pair of plate rail 73, as shown in figure 18, each plate rail 73 has oneself a front/rear definite sensor 90 (90A, 90B).Be sent to separately A/D converter 101A and 101B from the sensor of front/rear definite sensor 90A and 90B output Sa and Sb, and be transformed into digital signal.This is to the digitized microcomputer 103 of delivering to as control section of relatively exporting.103 pairs of microcomputers are relatively exported and are handled under software control.
If the output Sa of sensor and Sb are lower than with reference to level REFa, disc 10 is confirmed as placing correct, as shown in Figure 7.If sensor output Sa and Sb be greater than first with reference to level REFa, less than second with reference to level REFb, disc 10 is confirmed as reverse placement, as shown in Figure 8.When sensor output Sa and Sb greater than second with reference to level REFb, disc 10 is confirmed as placing incorrect, as shown in Figure 9.
When disc 10 was placed incorrect but do not changed its front-back, as shown in Figure 7, two are relatively exported all was low level.So, lifting gear 105 startings of pressing plate are placed on the plate rail 73 disc 10.In situation shown in Figure 8, the control of microcomputer 103 output stops pressing plate 76 to move up and down.Pilot lamp 106 produces warning (flicker) and produces wrong shows signal, so that display part 107 shows these states (for example, reverse laying state).According to indication and demonstration, the operator can make suitable adjustment.Placing under the incorrect situation, as shown in Figure 9, pressing plate 76 can not move up and down, and indication is reported to the police and made alarm indication (as continuous show state).
Because pressing plate 76 can not promote, this incorrect state can be detected out before disc 10 snaps in turntable 70.Like this, disc 10 is protected and is not damaged.This is because the hub 4 of disc 10 face side (recording surface side) in the past is stuck, and as shown in Figure 2, and can not block from rear surface side (protection face side).If disc 10 rotates under the incorrect situation of placement, it can rotate disorder.Do not promote disc if disc correctly is placed on the plate rail 3, as shown in Figure 9, disc can not snap in turntable 70 and may be damaged.Yet these incorrect laying states can be detected out.
There is no need hub 4 to be set, because before disc 10 is stuck, just can determine incorrect laying state on the both sides of disc 10.Measure front/rear laying state if whether the track rub-out signal that produces during according to disc 10 rotations exists, disc 10 should be made also and can block from the back side so.
Converter 101A as shown in figure 12 and the comparison procedure among the 101B can be carried out by software mode, so these two parts can be omitted, sensor output can directly be added to microcomputer 103.
Can adopt the replacement of on protection substrate 6, tinting to reduce to protect the reflectivity of substrate 6 with the wiper rubbing down.About three kinds of fixing pigment can be considered to mix and substrate 6 blackings will be protected.In this example, when using infrared ray to determine front/rear, infrared ray may the pierce through the protection substrate.Carbon can be added to and prevent infrared penetration protection substrate in the black pigment.
Under situation shown in Figure 1, protect flange 7 to make it to become one in the outward flange formation of protection substrate 6.Yet annular element 110 can be used as the protection flange and adheres on the protection substrate 6, as shown in figure 13.In this example, the diameter of protection substrate 6 is bigger slightly than substrate of glass 1, and annular element 110 is adhered to stretching out on the annular circumferential of protection substrate 6.The material of annular element 110 can be identical with protection substrate 6, or use another kind of material, for example the such elastic body of rubber.
If elastic body will improve damping effect as annular element 110.Because disk can adopt a kind of roller that bonding agent is coated rapidly fully as protection substrate 6, and protection substrate 6 is lumped together with substrate of glass 1.Therefore, enhance productivity greatly.
In the embodiment shown in fig. 14, the diameter of protection substrate 6 equals the diameter of substrate of glass 1 haply, and annular element 112 is bonded on the protection substrate 6, so that covers the outer edge surface of protection substrate 6 and the outward flange of substrate of glass 1.The height of annular element 112 is La.
According to this figure, can strengthen the adhesive coverage face of annular element 112, annular element 112 is bonded on the protection substrate 6 securely.Can insert cushion cover 113 in the space between annular element 112 and substrate of glass 1, the linear expansion coefficient of cushion cover 113 equates with protection substrate 6.Certainly, cushion cover 113 can play the effect of stationary annular part 112.Annular element 112 can be by making such as the such elastic body of rubber.
Figure 15 provided can the double-sided recording modes data a kind of disc, in the present embodiment, substrate of glass 1 and 1 ' the be bound up on two sides of protection substrate 115, record surface 2 and 2 in the base ' substrate of glass 1 and 1 ' inside surface.A pair of hub 4 and 4 ' respectively be contained in substrate of glass 1 and 1 ' on so that disc 10 can both be stuck from any one side on two sides, front and back.For cover glass substrate 1 and 1 ' outward flange, protection flange 116 forms one with protection substrate 115, lower convexity on the outer edge part of protection substrate 115, the height of bossing equates up and down.
Figure 16 has provided a kind of tray salver 120 of the disc 10 of depositing band protection flange.In the time will using disc 10, just from tray salver 120 with its taking-up.Tray salver 120 comprises a main body 122 and a loam cake 123.The inwall 124 of main body 122 prevents disc 10 vibrations.Between inwall 124 and disc 10, a little space can be arranged, not be difficult to put into disc 10 because there is this space.
Like this, because bump inwall 124 discs 10 might be impaired.Protection flange 7 on the protection substrate 6 can prevent this damage, as shown in figure 17.Protection flange 7 has protected substrate of glass 1 to make it can not directly clash into inwall 124.Thereby prevented the damage of substrate of glass 1.
As mentioned above, the present invention has covered the outward flange of recording medium substrate with the protection flange.
According to the present invention, when the outward flange of recording medium substrate is clashed into, such bump can not act directly on the recording medium and can absorb by protected flange.Therefore improved the crash protection characteristic, prevented recording medium because the damage that collision and accident cause.Improved the reliability of recording medium.The present invention is applicable to disc-shape recoding medium, for example is used for magneto-optic disk and other magnetooptic recording/replay device of audiovisual dish.
Claims (9)
1, a kind of disc-shape recoding medium has at least one disc-shape recoding medium substrate, and it simultaneously has the information recording part branch, and it comprises:
One has the guard block of a peripheral part with respect to described recording medium base peripheral limit, in order to protect described recording section; With
A vibrating part of facing with it at the outward flange of described recording medium substrate.
2, disc-shape recoding medium according to claim 1, wherein said vibrating part are contained in the peripheral position of described guard block.
3, disc-shape recoding medium according to claim 2 wherein becomes one at the peripheral position formation vibrating part of described guard block and with described guard block.
4, disc-shape recoding medium according to claim 2, wherein said vibrating part are fixed on the peripheral position of described guard block.
5, disc-shape recoding medium according to claim 2 wherein has a gap between its feather edge of described recording medium and described vibrating part, this gap absorbs the dilatational strain of described recording medium substrate and/or described guard block.
6, disc-shape recoding medium according to claim 2 is wherein selected the height of described vibrating part, make that described vibrating part exceeds described recording medium substrate with the not contacted one side of described guard block.
7, disc-shape recoding medium according to claim 6, the neighboring of wherein said vibrating part and described recording medium substrate do not have on the facing surfaces scalene cone part and one to face part directly with described scalene cone partial continuous is joined on this surface, define the placement location that carrying device is laid described disc-shape recoding medium by described facing directly.
8, disc-shape recoding medium according to claim 7, wherein said guard block and the light reflectivity of the light reflectivity discontiguous surface of described recording section less than described recording medium substrate.
9, disc-shape recoding medium according to claim 1, wherein said recording medium substrate comprise that the use light beam is reset or the described recording section of recording/reproducing information.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP082727/95 | 1995-04-07 | ||
| JP7082727A JPH08279181A (en) | 1995-04-07 | 1995-04-07 | Discoid recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1164736A true CN1164736A (en) | 1997-11-12 |
Family
ID=13782460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96107396A Pending CN1164736A (en) | 1995-04-07 | 1996-04-07 | Disk type recording medium |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH08279181A (en) |
| KR (1) | KR960038796A (en) |
| CN (1) | CN1164736A (en) |
| CA (1) | CA2173421A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1831985B (en) * | 2000-04-25 | 2010-05-26 | 松下电器产业株式会社 | Optical disk, method for producing the same, and apparatus for producing the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100514252B1 (en) * | 1997-11-06 | 2005-11-28 | 엘지전자 주식회사 | Disc for recording media |
-
1995
- 1995-04-07 JP JP7082727A patent/JPH08279181A/en active Pending
-
1996
- 1996-04-03 CA CA002173421A patent/CA2173421A1/en not_active Abandoned
- 1996-04-04 KR KR1019960010087A patent/KR960038796A/en active IP Right Grant
- 1996-04-07 CN CN96107396A patent/CN1164736A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1831985B (en) * | 2000-04-25 | 2010-05-26 | 松下电器产业株式会社 | Optical disk, method for producing the same, and apparatus for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08279181A (en) | 1996-10-22 |
| KR960038796A (en) | 1996-11-21 |
| CA2173421A1 (en) | 1996-10-08 |
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| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |