CN100446103C - Disc apparatus - Google Patents
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- CN100446103C CN100446103C CNB2006100778954A CN200610077895A CN100446103C CN 100446103 C CN100446103 C CN 100446103C CN B2006100778954 A CNB2006100778954 A CN B2006100778954A CN 200610077895 A CN200610077895 A CN 200610077895A CN 100446103 C CN100446103 C CN 100446103C
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- Prior art keywords
- dish
- protruding members
- arc protruding
- protruding member
- pallet
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- 230000001681 protective effect Effects 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 2
- 238000004088 simulation Methods 0.000 description 8
- 238000007667 floating Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Abstract
A disc apparatus for recording or reading data to or from a disc includes a tray having a table on which the disc is placed and a shielding member that covers the tray. The shielding member has a circular opening and a plurality of arc protruding members. Each arc protruding member is provided on an inner surface of the shielding member that covers the tray as protruding towards an upper surface of the disc placed on the table of the tray. An end of each arc protruding member is situated near the opening. Each arc protruding member has a protruding end with a height ranging from 1.0 mm to 1.5 mm from the inner surface of the shielding member.
Description
The cross reference of related application
The application is based on the No.2005-137888 of Japanese patent application submission on May 10th, 2005 formerly and the No.2006-010821 that submitted on January 19th, 2006 and the requirement right of priority as the application, and its full content is being contained among the application by reference.
Technical field
The present invention relates to a kind of dish device, be used for reading or writing etc. to it from the dish of for example CD (compact disc) and DVD (digitizing how with dish).Especially, the present invention relates to a kind of can the operation and limit the dish device that floats owing to motor rotation causing dish.
Background technology
Known dish device with when being rotated at a high speed, relies on light picker to read from the dish of for example CD and DVD or write to it at the dish of installing.Place dish on the turntable and can rely on turntable motor on turntable, to rotate by clamping device.
In such dish device, when dish with 8, in the time of 000rpm or higher high-speed rotation, near the air the card also rotates, and because centrifugal force and flow to outside from the inside of dish.Such air-flow makes the air pressure of dish inner and upper reduce, thereby forces dish to float on turntable.Make power that dish floats can force dish to overcome holding force and discharge from turntable greater than the holding force of clamping device.
The technology of avoiding this dish to float is disclosed, for example not examining among the patent disclosure No.2001-250301 in Japan.The top board (protective element) 102 of disclosed covering disk crust of the device in this document has been shown among Figure 14.Figure 14 shows the surface that is facing the top board 102 that coils 2 upper surfaces.Top board 102 has several inner to the outside arc protruding members 104 of dish from coiling.Protruding member 104 forces air outside to internal flow from coiling, the reduction of restricted internal top air pressure, thus confinement plate is unsteady.
Unless inventor of the present invention has tested the structure that protruding member 104 is optimally determined in this technology and discovery, otherwise abundant confinement plate unsteady.At length, the air pressure of reduction dish inner and upper depends on the height of protruding member 104 and/or the gap between quantity, dish 2 and the element 104 etc., this may cause can't effectively limit unsteady.
Summary of the invention
The purpose of this invention is to provide a kind of dish device, in the dish high speed rotating, limited dish effectively and above turntable, floated.
The invention provides a kind of being used for comprises to dish record or from the dish device of its reading of data: pallet has the platform of holding tray on it; Turntable is placed with that separate from the platform of pallet and dish rotation during writing down and reading on it; And the protective element that covers pallet, this protective element has circular open, interior circular portion and outer ring part, the rotation center of the centrally aligned turntable of this circular open, circular portion and outer ring part all is arranged on the inside surface of protective element in described, circular portion is along the circular open setting in described, described outer ring part is concentric with described circular open, and a plurality of arc protruding members, each arc protruding members is arranged on the inside surface of the protective element that covers pallet, and towards the upper surface projection that is placed on the dish on the pallet platform, one end of each arc protruding members is in described between circle and the outer ring part, all arc protruding members have identical camber line bending direction, and the projecting end of each arc protruding members is from 1.0mm to 1.5mm from the altitude range of protective element inside surface.
Description of drawings
Fig. 1 is the decomposition diagram according to the dish device of the embodiment of the invention;
Fig. 2 is the skeleton view according to the top board inside surface of the embodiment of the invention;
The skeleton view of Fig. 3 shows for dish device and known disc device according to the embodiment of the invention and exists, the air-flow of the lower surface below of dish;
The skeleton view of Fig. 4 shows for dish device and known disc device according to the embodiment of the invention, the air-flow above the upper surface of dish;
Fig. 5 is the sectional view of known disc device;
The skeleton view of Fig. 6 shows near the air-flow the protruding member in according to the dish device of the embodiment of the invention;
Fig. 7 is the protruding member guide wire of alternative shape according to the embodiment of the invention;
Fig. 8 is the sectional view according to the dish device with protruding member of the embodiment of the invention;
Fig. 9 shows and has or not with under the situation according to the protruding member of the embodiment of the invention, acts on the analog result of air pressure of the upper and lower surface of dish;
Figure 10 has expressed and the size relevant according to the protruding member of the embodiment of the invention;
Figure 11 shows that dish that the height change according to the protruding member of the embodiment of the invention causes floats and the variation of card fluctuation;
Figure 12 shows that dish that the number change according to the protruding member of the embodiment of the invention causes floats and the variation of card fluctuation;
Figure 13 shows according to the gap between the protruding member of the embodiment of the invention and the dish and changes the variation that dish floats and card fluctuates that causes;
Figure 14 shows the top board of the shell that covers the known disc device.
Embodiment
Fig. 1 is the decomposition diagram according to the dish device MA of the embodiment of the invention.Dish device MA is enclosed in the box-shaped shell 10.Shell 10 comprises the top board (protective element) 6 at open-topped housing main body 1 and covering shell main body 1 top.Such structure obtains airtight state in shell 10, can not have contamination by dust etc. basically.
Be provided with turntable 3 in shell 10, dress is attached on the turning axle as the motor 11 of spindle drive motor.Dish 2 removably places on the turntable 3.Light picker 4 is installed in the turntable 3, can be along the radial direction to-and-fro movement of coiling below dish 2.Pick-up 4 is used for reproducing to dish 2 records or from coiling 2.Motor 11 is installed on the pedestal 9 that is fixed in housing main body 1, as shown in Figure 5, will narrate in the back.
Housing main body 1 has pallet 5, is used for dish 2 is loaded on the turntable 3 and from turntable 3 unloading.The pallet 5 gathering sill (not shown) to-and-fro movement by forming in the horizontal direction at main body 1 one ends.Pallet 5 is narrower than main body 1, thereby on the longitudinal direction that pallet moves, has the gap between the respective inner walls of each sidewall of pallet 5 vertical (directions that pallet 5 moves) and main body 1.Pallet 5 has opening 5a and platform 5b, and opening 5a is corresponding to motor 11 and light picker 4, and dish 2 is placed on the platform 5b.
The platform 5b that dish 2 is placed on the pallet 5 of pulling out from shell 1 main body goes up and guiding enters the main body 1.In case introducing dish 2, turntable 3 rises towards the following clamping device that will narrate 7.Dish 2 is with being placed on the turntable 3 and leaning on clamping device 7 fixed thereon.Rotation when dish 2 is separated from platform 5b.
The skeleton view of Fig. 2 shows the inside surface 61 that is facing pallet 5 and be placed on the top board 6 of dish 2 upper surfaces on the pallet platform 5b according to the embodiment of the invention, has protruding member.
The circumferential section 6d concentric with opening 6a is set on inside surface 61.Several protruding member 6b also are set on inside surface 61, and as airflow guiding device, each all forms from thick wall part 6c and begins to circumferential section 6d and connect the arc of these parts.
So form arc protruding members 6b, make all juts all be orientated identical direction.Element 6b forms arc, but can not be arc completely.Following being described in detail, element 6b will guide to rotation center owing to the air-flow that dish 2 rotations cause.
In this embodiment, protruding member 6b forms the arc with same radius.The starting point of arc is separated from each other along the circumference of thick wall part 6c.In Fig. 2, the starting point of arc is separated from each other with constant interval.
In nearest dish device, disc spin speed reaches 10, thereby carries out high-speed record about 000rpm.In addition, as mentioned above, dish device MA has airtight construction, does not almost have contamination by dust.Therefore, in the time of dish 2 high speed rotating, the air in the dish above and below also can rotate, and flows to the outside owing to centrifugal force from the inside of coiling subsequently, thereby makes the air pressure of dish inner and upper reduce.
With discussion dish device MA tout court and known not with this air-flow of the dish device of protruding member, with reference to figure 3 and 4.The skeleton view of Fig. 3 shows the air-flow under the surface that will be recorded (lower surface of dish) of dish 2 of dish device MA and known disc device.The skeleton view of Fig. 4 shows the air-flow on the dish 2 and surface above-mentioned surface opposite (upper surface of dish) of coiling device MA and known disc device.
Shown in Fig. 3 and 4, air is in the dish 2 above and belows rotation along the rotation of the direction shown in the arrow R, subsequently because centrifugal force is inner to flows outside from coiling.
Fig. 5 is the sectional view of known disc device.At length, Fig. 5 shows the air-flow corresponding to Fig. 3 and 4 when the known devices cross section is seen.
Those elements corresponding to dish device MA of known disc device have all provided identical figure notation in institute's drawings attached.
Below dish 2, air-flow circulates shown in Fig. 5 arrow.At length, above pallet 5, change downwards in the outer rim of dish from coiling inner air-flow to the outside, outside from coiling below pallet to internal motion, and rise by the opening 5a of pallet.The air pressure that this air circulation can not cause coiling inner below reduces, but causes low negative pressure LNP.
On the contrary, the air that coils 2 tops just moves to the outside from the dish inner high speed, and do not have passage from outer flow to inside.This makes the air pressure of dish inner and upper reduce, and has caused than negative pressure HNP higher below it above dish 2.In the time of dish 2 high speed rotating, owing to reducing, the air pressure of coiling inner and upper produced the power that feasible dish upwards floats, and this may force dish to discharge from clamping device 7.
The skeleton view of Fig. 6 shows when the inside surface 61 of top board 6 is seen, near the air-flow the protruding member 6b among the dish device MA (embodiment of the invention).
Shown in the arrow among Fig. 6, the air-flow that produces when direction shown in the dish 2 towards arrow L when rotation is guided by protruding member 6b and towards the rotation center of dish.
Fig. 7 is the guide wire of alternative shape of arc protruding members 6b.When dish 2 when direction shown in the arrow A rotate, produce air-flow and air-flow and move towards the direction shown in the arrow B owing to centrifugal force.Yet, collide and its direction changed into towards the tangential direction of element 6b arc towards the air-flow and the arc protruding members 6b of arrow B direction motion.Subsequently, air-flow moves towards the rotation center of dish towards the direction shown in the arrow C along arc.
When the rotation center of more close dish, the passage that is used for steering current becomes narrower, and near the air pressure the disc spins center increases according to Bernoulli's law.This is used for preventing discharging from clamping device 7 at high rotation speed lower wall 2, and can take place when such projection is not provided.
Fig. 8 is the sectional view according to the dish device MA with protruding member 6b of the embodiment of the invention.At length, Fig. 8 shows cross section from device MA when seeing, corresponding to Fig. 3,4 and 6 air-flow.
Below dish 2, air-flow and similar circulation the shown in Figure 5.At length, above pallet 5, change downwards in the outer rim of dish from coiling inner air-flow to the outside, outside from coiling below pallet to internal motion, and rise by the opening 5a of pallet.The air pressure that this air circulation can not cause coiling inner below reduces, but causes low negative pressure LNP.
On the contrary, the air-flow that above dish 2, has two types: a kind of from coiling internal motion to the outside; Another kind rotation center towards dish under the help of protruding member 6b moves, as mentioned above.
From coiling inner air-flow to the outside than there not being the slower of this protruding member 6b, LS is lower than the HS among Fig. 5 for its speed in the present embodiment.Slower like this airflow limitation near the reduction of the air pressure disc spins center, cause lower negative pressure LNP.This is used for confinement plate 2 and upwards floats and prevent that it from discharging from clamping device under high rotation speed.
Illustrated among Fig. 9 have or not with situation according to the protruding member 6b of the embodiment of the invention under, act on the analog result of the air pressure of the lower surface that is used to write down of dish 2 or opposite upper surface.
Figure among Fig. 9 (A) shows the negative pressure of the upper surface that acts on dish, does not have protruding member 6b on top board 6.Figure among Fig. 9 (B) shows the negative pressure of the lower surface that acts on dish, does not have protruding member 6b on top board 6.
Figure among Fig. 9 (C) shows the negative pressure of the upper surface that acts on dish, has protruding member 6b on top board 6.Figure among Fig. 9 (D) shows the negative pressure of the lower surface that acts on dish, has protruding member 6b on top board 6.
Figure among Fig. 9 (C) and (D) show the analog result that 24 protruding member 6b are provided on top board 6.
In the simulation of each figure of Fig. 9, adopted identical dish device, except top board 6 in figure (A) and simulation (B) has flat surface and do not have the protruding member 6b.
The simulation of figure (A) shows near disc spins center the highest negative pressure P among Fig. 9
L: be lower than P
LMedium negative pressure P
MAnd when more near dish outside minimum negative pressure P
S,, promptly the closer to rotation center, the reduction of air pressure is just bigger.The simulation of figure (B) shows the almost constant low negative pressure P below the dish lower surface among Fig. 9
S
Figure (A) and figure (B) have instructed negative pressure higher than lower surface when on top board 6 protruding member 6b not being set to act on the dish upper surface among Fig. 9, particularly near the disc spins center.
The simulation of figure (C) shows the almost constant low negative pressure P above the dish upper surface among Fig. 9
s, have the negative pressure P that only acts on a upper surface part
MThe simulation of figure (D) also shows the almost constant low negative pressure P below the dish lower surface among Fig. 9
S, have the negative pressure P that only acts on the part lower surface
M
Figure (C) and scheme (D) and instructed that almost equal negative pressure acts on the upper and lower surface of dish when on top board 6 protruding member 6b being set among Fig. 9.
According to the simulation of each figure among Fig. 9, find the protruding member 6b of setting on the top board 6 in the dish device MA of the embodiment of the invention, be used for providing almost constant negative pressure, and also provide almost equal negative pressure in the upper and lower surface of coiling at the upper surface of dish.
How next protruding member 6b is discussed influences according to the air-flow among the dish device MA of the embodiment of the invention.
In speed 8, act on the air pressure simulation of dish upper and lower surface under the rotational speed of 000rpm, its parameter is: be arranged on height and the quantity of the protruding member 6b on the top board 6, and coil 2 and element 6b between the gap.
Table 1 to the analog result shown in 3 has Three Estate: " best " is illustrated between the dish upper and lower surface does not almost have the poor of air pressure; " well " be illustrated in have therebetween little poor; And that " bad " expression has therebetween is big poor.
Defined the size relevant: L1 among Figure 10 with protruding member 6b ... each element 6b is attached to upper end on the top board 6 to the height facing to dish 2 lower end from its dress; L2 ... gap between lower end and the dish upper surface.
Table 1 shows the analog result of the height L1 variation of each protruding member 6b.
Table 1
| The height L1[mm of protruding member] | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 | 1.1 | 1.2 |
| Air pressure difference | Bad | Bad | Well | Well | Well | Best | Best | Best |
| The height L1[mm of protruding member] | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | 2.0 |
| Air pressure difference | Best | Best | Best | Well | Well | Bad | Bad | Bad |
Table 1 be illustrated in height L1 be pressure differential between 0.7 to 1.7mm the scope mid-game upper and lower surface for good, and be best in 1.0 to 1.5mm scope.Therefore, the preferable range of protruding member 6b height L1 is to 1.7mm, more preferably from 1.0mm to 1.5mm from 0.7.
Table 2 shows the analog result of the number change of protruding member 6b.
Table 2
| The quantity of protruding |
5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Air pressure difference | Bad | Bad | Bad | Best | Best | Best | Best | Best | Best | Best | Best | Best |
| The quantity of protruding member | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| Air pressure difference | Best | Best | Best | Best | Best | Best | Best | Best | Well | Well | Well | Well |
| The quantity of protruding member | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
| Air pressure difference | Well | Well | Bad | Bad | Bad | Bad | Bad | Bad | Bad | Bad | Bad | Bad |
Table 2 be illustrated in protruding member 6b quantity be pressure differential between 8 to 30 the scope mid-game upper and lower surface for good, and be best in 8 to 24 scope.Therefore, the preferable range of protruding member 6b quantity is from 8 to 30, more preferably from 8 to 24.
Table 3 shows protruding member 6b and coils the analog result that the gap L 2 between 2 changes.
Table 3
| Gap L 2[mm] | 1.00 | 1.05 | 1.10 | 1.15 | 1.20 | 1.25 | 1.30 | 1.35 | 1.40 |
| Air pressure difference | Bad | Bad | Bad | Bad | Well | Well | Well | Well | Well |
| Gap L 2[mm] | 1.45 | 1.50 | 1.55 | 1.60 | 1.65 | 1.70 | 1.75 | 1.80 | 1.85 |
| Air pressure difference | Well | Best | Best | Best | Best | Best | Best | Best | Best |
| Gap L 2[mm] | 1.90 | 1.95 | 2.00 | 2.05 | 2.10 | 2.15 | 2.20 | 2.25 | 2.30 |
| Air pressure difference | Best | Best | Best | Best | Best | Best | Best | Best | Best |
Table 3 be illustrated in gap L 2 for the air pressure difference between 1.20mm or the bigger hour indicator upper and lower surface for good, and at 1.50mm or be best when bigger.Therefore, preferred gap L 2 is 1.20mm or bigger, is more preferably 1.50mm or bigger, but surpasses 3.0mm or littler, surpasses 3.0mm and can cause clamping device 7 to be difficult to clamping disk 2.
Carried out further test with a plurality of sample top boards 6 and proved this analog result with protruding member 6b according to the embodiment of the invention.
When height L1 and the quantity of protruding member 6b and coil 2 and element 6b between gap L 2 when table 1 changes to the scope shown in 3, the floating and the fluctuation of card of test panel.When the air pressure difference of dish between the upper and lower surface becomes more hour, just limited floating and the fluctuation of card of dish more.Figure 11 to 13 shows the variation that dish floats and card fluctuates.
Figure among Figure 11 (A) and the height that (B) shows protruding member 6b respectively are that 0.7mm, 1.0mm, 1.2mm, 1.5mm and 1.7mm hour indicator float and the variation of card fluctuation.At length, the figure among Figure 11 (A) illustrates the rotational speed of the unsteady average magnitude of dish than dish, and the figure among Figure 11 (B) illustrates the rotational speed of card undulate quantity than dish.
In this embodiment, 8, under 000rpm or the higher high rotation speed, the most acceptable dish average magnitude of floating is 60 μ m or littler, and the card undulate quantity also is 60 μ m or littler.
Figure among Figure 11 (A) illustrates when the height L1 of each protruding member 6b reduces, and the average quantitative change that dish floats is big.According to the figure among Figure 11 (A), height L1 must be at least 1mm.When height L1 became bigger, the average magnitude that dish floats diminished, yet card fluctuation quantitative change is big, shown in the figure among Figure 11 (B).According to the figure among Figure 11 (B), height L1 is necessary for 1.5mm or littler, under high rotating speed the card fluctuation is restricted to 6060 μ m or littler.
The height L1 step-down of protruding member 6b causes the unsteady big reason of quantitative change of dish to be, thereby it has limited air-flow from coiling outer flow to the inner air pressure that has reduced the dish inner and upper.On the contrary, the height L1 of protruding member 6b becomes big height and causes the big reason of card fluctuation quantitative change to be, thereby it can make too much air-flow become big from the air pressure difference of dish outer flow between the inner arc inside and outside that makes each protruding member 6b, has caused air turbulence to make dish 2 fluctuations.
Therefore, the optimum range of the height L1 of protruding member 6b is 1.0 to 1.5mm.
Figure among Figure 12 (A) and the height L1 that (B) shows protruding member 6b respectively are 1.2mm, and element 6b quantity is 12,24 and 36 o'clock dish floats and the variation of card fluctuation.At length, the figure among Figure 12 (A) illustrates the rotational speed of the unsteady average magnitude of dish than dish, and the figure among Figure 12 (B) illustrates the rotational speed of card undulate quantity than dish.
Figure among Figure 12 (A) illustrates the number change with respect to protruding member 6b, and the average magnitude that dish floats is roughly constant.On the contrary, the figure among Figure 12 (B) illustrates when the quantity of protruding member 6b increases, and the amount of dish fluctuation becomes big suddenly in higher rotational speed.Because the resonance of the dish 2 that the air turbulence of dish between inside and outside produces when making the external drive frequency near the higher order resonances frequency of dish 2 has caused fluctuation.
According to the figure among Figure 12 (A) and (B), the optimal number of protruding member 6b is 24 or still less.The air pressure difference that table 2 also illustrates between the dish upper and lower surface that the quantitative range of protruding member 6b provided in from 8 to 24 o'clock is best.Therefore, the optimal number scope of protruding member 6b is from 8 to 24.
Figure among Figure 13 (A) and the height L1 that (B) shows 12 protruding member 6b respectively are 1.2mm, the variation that dish floats and card fluctuates the when gap L 2 between dish 2 and the element 6b be 1.25mm, 1.5mm, 1.75mm, 2mm and 2.25mm.At length, the figure among Figure 13 (A) illustrates the rotational speed of the unsteady average magnitude of dish than dish, and the figure among Figure 13 (B) illustrates the rotational speed of card undulate quantity than dish.
Figure among Figure 13 (A) and (B) gap L 2 between dish 2 and protruding member 6b is shown when narrowing down, the average magnitude of floating at the high rotation speed lower wall and the amount of card fluctuation all increase.This is because the air-flow that narrows down between hour indicator 2 and the element 6b when gap L 2 postpones to have caused from the restriction of dish outer flow to internal gas flow, thereby makes the air pressure of dish inner and upper reduce.
According to the figure among Figure 13 (A) and (B), best gap L 2 is 1.5mm or wideer.
As mentioned above, guarantee following requirements, thereby make that the air pressure difference of dish 2 upper and lower surfaces act on high speed rotating is less.
Each protruding member 6b is attached to the height L1:0.7mm to 1.7mm of upper end to its lower end of top board 6 from it;
The quantity of element 6b: 8 to 30; And
Gap L 2:1.2mm to 3.0mm between dish 2 and the element 6b.
In addition, being used for the best that effective confinement plate is floated and card fluctuates requires as follows:
Height L1:1.0mm to 1.5mm;
The quantity of protruding member 6b: 8 to 24; And
Gap L 2:1.5mm to 3.0mm.
As disclosed in detail, reach the present invention of height L1, protruding member quantity and gap L 2 requirements listed above, effectively limited the reduction of coiling air pressure on the 2 high speed rotating hour indicator inside.
In addition, thus the present invention has effectively limited floating of dish to prevent to coil 2 and discharges from clamping device 7.
In addition, the present invention is effectively lower acts on dish 2 upper surfaces and will coil 2 negative pressures towards motor 11 promotions, thereby has limited the fluctuation of panel surface when high speed rotating, even coil 2 center of gravity when removing from original point, it provides stable record or reproduction.
In addition, this restriction to the card fluctuation has been arranged, the invention provides the high-quality dish device that produces less noise.
Claims (7)
1. one kind is used for comprising to dish record or from the dish device of its reading of data:
Pallet has the platform of holding tray on it;
Turntable is placed with that separate from the platform of pallet and dish rotation during writing down and reading on it; And
Cover the protective element of pallet, this protective element has circular open, interior circular portion and outer ring part, the rotation center of the centrally aligned turntable of this circular open, circular portion and outer ring part all is arranged on the inside surface of protective element in described, circular portion is along the circular open setting in described, described outer ring part is concentric with described circular open, and a plurality of arc protruding members, each arc protruding members is arranged on the inside surface of the protective element that covers pallet, and towards the upper surface projection that is placed on the dish on the pallet platform, one end of each arc protruding members is in described between circle and the outer ring part, all arc protruding members have identical camber line bending direction, and the projecting end of each arc protruding members is from 1.0mm to 1.5mm from the altitude range of protective element inside surface.
2. dish device as claimed in claim 1 is characterized in that arc protruding members is set to connect interior circular portion and outer ring part.
3. dish device as claimed in claim 2 is characterized in that arc protruding members has identical radius.
4. dish device as claimed in claim 2, the end that it is characterized in that being positioned near the arc protruding members the opening is separated from one another along the circumference of circular portion.
5. dish device as claimed in claim 4 is characterized in that the constant interval separated from one another, end of a plurality of arc protruding members.
6. dish device as claimed in claim 1, the projecting end that it is characterized in that each arc protruding members is separated 1.5mm at least with the upper surface that is placed on the dish on the pallet platform.
7. dish device as claimed in claim 1 is characterized in that the quantity of arc protruding members is equal to or greater than 8, but is equal to or less than 24.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005137888 | 2005-05-10 | ||
| JP2005137888 | 2005-05-10 | ||
| JP2006010821 | 2006-01-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1862685A CN1862685A (en) | 2006-11-15 |
| CN100446103C true CN100446103C (en) | 2008-12-24 |
Family
ID=37390091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100778954A Expired - Fee Related CN100446103C (en) | 2005-05-10 | 2006-05-10 | Disc apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100446103C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05135464A (en) * | 1991-11-13 | 1993-06-01 | Matsushita Electric Ind Co Ltd | Disk checking device |
| JP2001006325A (en) * | 1999-06-18 | 2001-01-12 | Nippon Densan Corp | Recording medium driving device |
| JP2001110175A (en) * | 1999-07-30 | 2001-04-20 | Toshiba Corp | Optical disk device |
| JP2001229661A (en) * | 2000-02-09 | 2001-08-24 | Hitachi Ltd | Disk drive |
| JP2001250301A (en) * | 2000-03-06 | 2001-09-14 | Victor Co Of Japan Ltd | Disk device |
-
2006
- 2006-05-10 CN CNB2006100778954A patent/CN100446103C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05135464A (en) * | 1991-11-13 | 1993-06-01 | Matsushita Electric Ind Co Ltd | Disk checking device |
| JP2001006325A (en) * | 1999-06-18 | 2001-01-12 | Nippon Densan Corp | Recording medium driving device |
| JP2001110175A (en) * | 1999-07-30 | 2001-04-20 | Toshiba Corp | Optical disk device |
| JP2001229661A (en) * | 2000-02-09 | 2001-08-24 | Hitachi Ltd | Disk drive |
| JP2001250301A (en) * | 2000-03-06 | 2001-09-14 | Victor Co Of Japan Ltd | Disk device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1862685A (en) | 2006-11-15 |
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