CN100365721C

CN100365721C - CD drive

Info

Publication number: CN100365721C
Application number: CNB2004100896097A
Authority: CN
Inventors: 卢明兴
Original assignee: Lite On IT Corp
Current assignee: Lite On IT Corp
Priority date: 2004-10-28
Filing date: 2004-10-28
Publication date: 2008-01-30
Anticipated expiration: 2024-10-28
Also published as: CN1767028A

Abstract

The present invention relates to optical disk player. A clamp and a top cover of a spindle motor are utilized to cover and clamp an optical disk on a tray, and a clamp seat is also arranged between the clamp and the tray in order to bear the clamp, wherein the clamp seat is provided with a clamp seat circular hole, and the clamp covers and clamps the optical disk with the top cover of the motor by the clamp seat circular hole. The clamp seat is provided with a bulge structure and a bulge elastic structure near the relative position of the upper surface of the edge of the clamp seat circular hole. When the spindle motor descends to make the top cover of the motor remote from the clamp, the bulge structure and the bulge elastic structure simultaneously contact the clamp and upward apply the force to the clamp, and thus, the bulge elastic structure is compressed to deform in order to make the clamp horizontally arranged inclined, and thereby, the magnetic forces which mutually attract between the clamp and a magnetic element are gradually relieved.

Description

CD-ROM device

Technical field

The invention relates to a kind of CD-ROM device, refer to be used in the CD-ROM device clamp holder structure that separates clamp and Spindle Motor in order to auxiliary especially, and the holding tray motor size of current of control separation clamp and Spindle Motor.

Background technology

Along with popularizing of CD-RW discsCD-RW, CD-ROM device has become one of most important data storing/reading device.See also Figure 1A and Figure 1B, Figure 1A is a CD-RW discsCD-RW 4 and the exploded perspective view that is close to associated component in the known technology CD-ROM device 2.Figure 1B is the schematic side view of Figure 1A.CD-ROM device 2 is utilized the motor top cover 804 double team CD-RW discsCD-RW 4 of clamp 6 and Spindle Motor 8.

Utilize the magnetic part 802 in the motor top cover 804 to attract each other, so that the upwards pallet perforate 1002 by pallet 10 of motor top cover 804, and be positioned over CD-RW discsCD-RW 4 on the pallet 10 with clamp 6 double teams with magnetic force and clamp 6.The follow-up drive shaft motor 8 that passes through rotates with rotation CD-RW discsCD-RW 4.Pallet 10 carrying CD-RW discsCD-RW 4 are with into and out of CD-ROM device 2, and Spindle Motor 8, clamp 6 and clamp seat 12 all are arranged at CD-ROM device 2 inside.Wherein, 10 on clamp 6 and pallet also are provided with clamp seat 12, with support clamp 6, a clamp seat circular hole 1202 are set in the clamp seat 12, vertical pallet perforate 1002 to corresponding CD-RW discsCD-RW 4 center holes 402 and pallet 10.The bottom of clamp 6 is downwards by this clamp seat circular hole 1202, and motor top cover 804 double teams that are upward through pallet perforate 1002 place the CD-RW discsCD-RW 4 of 10 on clamp seat 12 and pallet.

Further see also Fig. 2 A and Fig. 2 B, Fig. 2 A is the synoptic diagram of known technology lifting Spindle Motor 8.Fig. 2 B is the side view of Fig. 2 A.Pallet 10 is to put described CD-RW discsCD-RW 4 in order to carrying, and provides power by the holding tray motor in the CD-ROM device 4 14, so that pallet 10 is passed in and out CD-ROM device 2.

One of holding tray motor 14 rotates end and connects a gear 1402, by Rotary tray motor 14 so that gear 1402 rotations.One travelling arm 16 is set in parallel in pallet 10 belows, and contiguous and be arranged in parallel with the opening of CD-ROM device 2.The surface of travelling arm 16 is provided with a tooth bar 1602, and tooth bar 1602 and gear 1402 engagements back and forth rotate by gear 1402, so that travelling arm 16 left and right in CD-ROM device 2 moves, wherein the surface of travelling arm 2 also is provided with two guide protrusions parts 1604.

After pallet 10 entered CD-ROM device 2, Spindle Motor 8 was arranged at pallet 10 belows and is fixedly set on the Spindle Motor seat 18.Spindle Motor seat 18 differs from a side of opening with one 1802 CD-ROM device 2 that is coupling, and the side of adjacent openings extends a guide plate 1804 with vertical direction.The guide groove 1806 of two oblique extensions is set on the guide plate 1804, and guide protrusions parts 1604 cooperate guide groove 1806 to be active in back and forth in the guide groove 1806.

Wherein, when guide protrusions parts 1604 are active in the guide groove 1806 of oblique setting back and forth, by guide protrusions parts 1604 contact guidance grooves 1806 vertically to component, so that guide plate 1804 upper and lower moving, making Spindle Motor seat 18 thus is axle center and upper and lower swing with axle 1802, so make Spindle Motor 8 approaching, leave clamp 6.Specify that after pallet 10 entered CD-ROM device 2, Spindle Motor seat 18 cooperated with upwards swing, so that Spindle Motor 8 upwards rises.And before pallet 10 withdrawed from CD-ROM device 2, Spindle Motor seat 18 needed earlier to lower swing, so that Spindle Motor 8 is fallen.

Yet, when known technology driving tray motor 14 when falling Spindle Motor 8, need overcome the magnetic force of 802 of clamp 6 and magnetic parts, break away from the magnetic force constraint of magnetic parts 802 and leave moment of motor top cover 804 in clamp 6, change into a large amount of kinetic energy that Spindle Motor 8 moves suddenly, make Spindle Motor 8 impact the thrust bearing 20 (as shown in Figure 1) of Spindle Motor 8 belows downwards, except causing noise, also can reduce the life-span of assembly.

In addition, see also Fig. 3, Fig. 3 is the synoptic diagram that the electric current of known technology driving tray motor 14 changes.Known technology is fallen for providing enough energy to make Spindle Motor 8 leave clamp 6, for overcoming the magnetic force of 802 of clamp 6 and magnetic parts, after the initial current A of initial holding tray motor 14 produces, suddenly with current boost, so that holding tray motor 14 has enough strength to overcome the magnetic force of 802 of clamp 6 and magnetic parts, we claim that this section electric current is to fall motor current B, are generally to ask reliable, and the size of current of falling motor current can be much larger than initial current A.

And after Spindle Motor 8 was fallen, holding tray motor 14 provided with less current to push pallet 10, and we claim that this section electric current is that a pallet pushes electric current D.Reduce to the process that pallet pushes electric current D by falling motor current B, can fall electric current C stage by stage gradually, pallet pushes electric current D even may be also low compared with beginning electric current A usually.

Yet, this section fallen motor current B much larger than initial current A's, there is enough strength to fall Spindle Motor 8 though can guarantee holding tray motor 14 to overcome the magnetic force of 802 of clamp 6 and magnetic parts, but the excessive energy of falling motor current B also can change into a large amount of kinetic energy that Spindle Motor 8 is moved, and also is that the thrust bearing 20 that makes Spindle Motor 8 impact Spindle Motor 8 belows downwards produces one of reason of excessive noise.

Summary of the invention

The object of the present invention is to provide a kind of CD-ROM device, be used in the CD-ROM device in order to separate the clamp holder structure of clamp and Spindle Motor, reduce the impulsive force that the Spindle Motor and the clamp time of releasing produce, fall the bump noise that thrust bearing was sent to slow down Spindle Motor.

Another object of the present invention is to provide a kind of CD-ROM device, further, similarly can reduce the impulsive force that the Spindle Motor and the clamp time of releasing produce utilizing control in order to separate the holding tray motor size of current of clamp and Spindle Motor.

For achieving the above object, CD-ROM device provided by the invention comprises:

One pallet is arranged in this CD-ROM device, in order to carrying a CD-RW discsCD-RW, in this pallet position that should the CD-RW discsCD-RW center hole is provided with a pallet perforate;

One clamp seat is arranged at this pallet top, in this clamp seat to should one clamp seat circular hole being set the CD-RW discsCD-RW center hole;

One clamp is arranged at this clamp seat top;

One bulge-structure is arranged between the upper surface at this below, clamp edge and contiguous this clamp seat circular hole edge of this clamp seat;

One protruding elastic construction in the relative position of this bulge-structure, is arranged between the upper surface at this below, clamp edge and contiguous this clamp seat circular hole edge of this clamp seat; And

One Spindle Motor, in order to the power of this CD-RW discsCD-RW of rotation to be provided, this Spindle Motor comprises a magnetic part and a motor top cover, this magnetic part and this clamp attract each other, make this clamp downwards by this clamp seat circular hole, with with the motor top cover by this pallet perforate upwards, the CD-RW discsCD-RW between this clamp seat of double team and this pallet;

Wherein, when this Spindle Motor is fallen when making this motor top cover away from this clamp, the power that bulge-structure between this clamp seat and this clamp and protruding elastic construction can be compressed simultaneously, so that should the projection elastic construction be compression set, and then horizontally disposed clamp is tilted, thus progressively to remove the magnetic force that attracts each other between this clamp and this magnetic part.

Wherein this bulge-structure and the relative position that should the projection elastic construction be fixedly set in contiguous this clamp seat circular hole edge upper surface of this clamp seat, and contact with the below, edge of this clamp.

Wherein this bulge-structure and the relative position that should the projection elastic construction be fixedly set in the rim under surface of this clamp, and contact with the upper surface at contiguous this clamp seat circular hole edge of this clamp seat.

This CD-ROM device also comprises an opening, and this opening passes in and out this CD-ROM device for this pallet, and wherein this bulge-structure is than contiguous this opening of this projection elastic construction.

This CD-ROM device also comprises:

One holding tray motor, in order to the power that provides this pallet to pass in and out this CD-ROM device, this holding tray motor connects a gear, by rotating this holding tray motor so that the rotation of this gear;

One travelling arm, be set in parallel in this pallet below, and it is contiguous and be arranged in parallel with the opening of this CD-ROM device, the surface of this travelling arm is provided with a tooth bar, this tooth bar and this gearing mesh, back and forth rotate by this gear, so that this travelling arm left and right in this CD-ROM device moves, wherein the surface of this travelling arm also is provided with at least one guide protrusions parts; And

One Spindle Motor seat, be arranged at this pallet below, this Spindle Motor is fixedly set in this Spindle Motor seat, the side shaft that this Spindle Motor seat differs from this opening connects this CD-ROM device, the side of contiguous this opening extends a guide plate with vertical direction, the guide groove of at least one oblique extension is set on this guide plate, and these guide protrusions parts cooperate this guide groove to be active in back and forth in this guide groove;

Wherein, when these guide protrusions parts are active in the guide groove of oblique setting back and forth, by these guide protrusions parts contact this guide groove vertically to component, so that this guide plate moves up and down, this Spindle Motor seat is coupling swinging up and down, so make this Spindle Motor approaching/leave this clamp.

Wherein utilize a holding tray motor to drive so that this Spindle Motor is fallen, the electric current of falling in this Spindle Motor process comprises:

One initial electric current is the initial size of current of this holding tray motor;

One falls motor current, in order to drive this holding tray motor to fall this Spindle Motor, be connected in this initial current after, this size of falling motor current is low than the size of current of this initial current;

At least one insurance electric current, after being connected in this and falling motor current, the size of this insurance electric current is height than this size of current of falling motor current, fall the power that motor current produces when this and can't overcome interactional magnetic force between this clamp and this magnetic part, thereby can't fall this Spindle Motor the time, this insurance electric current is in order to drive this holding tray motor to fall this Spindle Motor; And

One pallet pushes electric current, be connected in this insurance electric current after, the size that this pallet pushes electric current is low than the size of current of this insurance electric current, this pallet propelling movement electric current is in order to drive this holding tray motor to push this pallet.

Therefore, be used in the CD-ROM device in order to separate the clamp holder structure of clamp and Spindle Motor by the present invention, utilize bulge-structure set between clamp seat and clamp and protruding elastic construction, when clamp is separated with Spindle Motor, make horizontally disposed clamp tilt, to reduce the impulsive force that the Spindle Motor and the clamp time of releasing produce, fall the bump noise that thrust bearing was sent to slow down Spindle Motor.Further, control utilizes the less insurance electric current of falling motor current and edging up in order to separate the holding tray motor size of current of clamp and Spindle Motor, similarly can reduce the impulsive force that the Spindle Motor and the clamp time of releasing produce.

Description of drawings

Can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.

Figure 1A is a CD-RW discsCD-RW and the exploded perspective view that is close to associated component in the known technology CD-ROM device;

Figure 1B is the schematic side view of Figure 1A;

Fig. 2 A is the synoptic diagram of known technology lifting Spindle Motor;

Fig. 2 B is the side view of Fig. 2 A;

Fig. 3 is the synoptic diagram that the electric current of known technology driving tray motor changes;

Fig. 4 A is the CD-ROM device exploded perspective view of explanation first embodiment of the invention;

Fig. 4 B is the schematic side view of Fig. 4 A of the present invention;

The synoptic diagram that Fig. 5 Spindle Motor of the present invention separates with clamp;

Fig. 6 is the schematic side view of second embodiment of the invention CD-ROM device;

Fig. 7 is first specific embodiment of the present invention's projection elastic construction;

Fig. 8 is second specific embodiment of the present invention's projection elastic construction;

Fig. 9 is the synoptic diagram of CD-ROM device outward appearance of the present invention; And

Figure 10 is the synoptic diagram that the electric current of driving tray motor of the present invention changes.

Embodiment

See also Fig. 4 A and Fig. 4 B, Fig. 4 A is CD-ROM device 30 exploded perspective views of explanation first embodiment of the invention.Fig. 4 B is the schematic side view of Fig. 4 A of the present invention.The invention relates to a kind of CD-ROM device 30, comprise a pallet 32, a clamp seat 34, a Spindle Motor 36 and a clamp 38.Pallet 32 can debouch in the CD-ROM device 30, in order to carry a CD-RW discsCD-RW 40, sends into CD-ROM device 30 so that CD-RW discsCD-RW 40 is sent, and the position of corresponding CD-RW discsCD-RW 40 center holes 4002 is provided with a pallet perforate 3202 in the pallet 32.

Clamp seat 34 is arranged in the CD-ROM device 30, after pallet 32 is sent in the CD-ROM device 30, clamp seat 34 can be positioned at the top of pallet 32, and corresponding CD-RW discsCD-RW 40 center holes 4002 are provided with a clamp seat circular hole 3402 in the clamp seat 34, and clamp 38 is horizontally placed on clamp seat 34 tops.The relative position of the upper surface at clamp seat 34 contiguous clamp seat circular holes 3402 edges respectively is provided with a bulge-structure 3404 and a protruding elastic construction 3406 respectively.

After pallet 32 was sent in the CD-ROM device 30, Spindle Motor 36 was arranged at the below of pallet 32, and Spindle Motor 36 is in order to provide the power of rotation CD-RW discsCD-RW 40.Spindle Motor 36 comprises a magnetic part 3602 and a motor top cover 3604, and motor top cover 3604 is arranged at Spindle Motor 36 tops, and magnetic part 3602 is set in motor top cover 3604.After CD-RW discsCD-RW 40 being arranged on the pallet 32 and send into CD-ROM device 30, Spindle Motor 36 can rise, and makes motor top cover 3604 upwards pass through pallet perforate 3202 with the bottom around contact CD-RW discsCD-RW 40 center holes 4002.

At this moment, be horizontally placed on the clamp 38 of clamp seat 34 tops, can attract each other with magnetic part 3602, the bottom that makes clamp 38 is downwards by clamp seat circular hole 3402, with with the motor top cover 3604 by pallet perforate 3202 upwards, in the circumference of

clamp seat

34 and 32 double team CD-RW discsCD-RW 40 center holes 4002 of pallet.

Cooperate Fig. 4 further to consult Fig. 5, Fig. 5 is the synoptic diagram that Spindle Motor 36 of the present invention separates with clamp 38.Fall when making motor top cover 3604 away from clamp 38 when Spindle Motor 36, the bulge-structure 3404 and the protruding elastic construction 3406 of clamp seat 34 upper surfaces contact clamp 38 simultaneously, and to clamp 38 application of force upwards.At this moment, protruding elastic construction 3406 compression sets so that horizontally disposed clamp 38 tilts, replace moment separation clamp 38 and Spindle Motor 36, thus progressively to remove 3602 magnetic force that attract each other of clamp 38 and magnetic part.

See also Fig. 6, Fig. 6 is the schematic side view for second embodiment of the invention CD-ROM device 30.Be similar to Fig. 4 B, but protruding elastic construction 3406 and bulge-structure 3404 can be fixedly set in clamp 38 lower surfaces respectively.Equally can reach the described usefulness of first embodiment.

Projection elastic construction 3406 can be any elastic body that is subjected to external stress compression, deformation, treat that external stress is removed after, promptly can restore to the original state.For example rubber, sponge all can, below illustrate again, but not as restriction with two embodiment.

Cooperate Fig. 4 to see also Fig. 7, Fig. 7 is first specific embodiment of the present invention's projection elastic construction 3406.Projection elastic construction 3406 can be fixed for one one end, and the other end is bent upwards the shell fragment 50 of extension, and the end that the rim under surface contact flat spring 50 of clamp 38 is bent upwards, the elastic force that the shell fragment 50 that is extended by bending makes progress is to support clamp 38 1 edges.When clamp 38 will separate with Spindle Motor 36, shell fragment 50 was subjected to from the downward bigger external stress of clamp 38, by shell fragment 50 downward deformation so that clamp 38 with inclination.The embodiment of Fig. 7 illustrates according to Fig. 4, in addition, also can the described protruding elastic construction 3406 of Fig. 7 be arranged at clamp 38 rim under surface according to Fig. 6.

See also Fig. 8, Fig. 8 is second specific embodiment of the present invention's projection elastic construction 3406.Projection elastic construction 3406 comprises a movable part 52 and a spring 54, clamp seat 34 clamp seat circular holes 3402 edges are provided with the hole ditch 56 of a upward opening, spring 54 is placed in the hole ditch 56 and the contact bottom, movable part 52 is positioned over spring 54 tops again, and the rim under surface of clamp 38 contact movable part 52 upper ends, the elastic force that is made progress by spring 54 is so that movable part 52 supports clamps 38 1 edges.When clamp 38 will separate with Spindle Motor 36, spring 54 was subjected to from the downward bigger external stress of clamp 38, by spring 54 compression sets so that clamp 38 with inclination.The embodiment of Fig. 8 illustrates according to Fig. 4, in addition, also can the described protruding elastic construction 3406 of Fig. 8 be arranged at clamp 38 rim under surface according to Fig. 6.

Further the outward appearance with CD-ROM device 30 is illustrated, and sees also Fig. 9, and Fig. 9 is the synoptic diagram of CD-ROM device 30 outward appearances of the present invention.Aforesaid CD-ROM device 30 also comprises an opening 42, and opening 42 is for pallet 32 turnover CD-ROM device 30.

Cooperate Fig. 4 or Fig. 6 to observe, its relief structure 3404 more protruding elastic construction 3406 adjacent openings 42, and be arranged between clamp seat 34 contiguous clamp seat circular hole 3402 edge upper surfaces and clamp 38 rim under surface.3406 of elastic constructions of projection are arranged at protruding relatively elastic construction 3406, and between clamp seat 34 contiguous clamp seat circular hole 3402 edge upper surfaces and clamp 38 rim under surface.So be provided with and make the effect of separating clamp 38 and Spindle Motor 36 preferable.

Can cooperate referring to known shown in Figure 2 about Spindle Motor 36 principles approaching, that leave clamp 38, CD-ROM device 30 also comprises a holding tray motor 14, a travelling arm 16 and a Spindle Motor seat 18.Holding tray motor 14 is in order to the power of pallet 32 turnover CD-ROM device 30 to be provided.One of holding tray motor 14 rotates end and connects a gear 1402, by Rotary tray motor 14 so that gear 1402 rotations.

Travelling arm 16 is set in parallel in pallet 32 belows, and contiguous and be arranged i.e. left and right setting in CD-ROM device 30 in parallel with the opening 42 of CD-ROM device 30.The surface of travelling arm 16 is provided with a tooth bar 1602, and tooth bar 1602 is and gear 1402 engagements.Back and forth rotate by gear 1402, so that travelling arm 16 left and right in CD-ROM device 30 moves, wherein the surface of travelling arm 16 also is provided with at least one guide protrusions parts 1604.

Spindle Motor seat 18 is arranged at pallet 32 belows, makes Spindle Motor 36 be fixedly set in Spindle Motor seat 18.The side that Spindle Motor seat 18 differs from opening 42 by one 1802 with the CD-ROM device 30 that is coupling, this 1802 axially be left and right in CD-ROM device 30.The side of adjacent openings 42 extends a guide plate 1804 with vertical direction, and the guide groove 1806 of at least one oblique extension is set on the guide plate 1804, and guide protrusions parts 1604 cooperate guide groove 1806 to be active in back and forth in the guide groove 1806.

Wherein, when guide protrusions parts 1604 are active in the guide groove 1806 of oblique setting back and forth, by guide protrusions parts 1604 contact guidance grooves 1806 vertically to component, so that guide plate 1804 moves up and down, Spindle Motor seat 18 is coupling swinging up and down, so make Spindle Motor 36 approaching, leave clamp 38.

In addition, see also Figure 10, Figure 10 is the synoptic diagram that the electric current of driving tray motor 14 of the present invention changes.Further specify, driving tray motor 14 is fallen the electric current in the process of Spindle Motor 36, comprises that an initial electric current A1, falls motor current B1, at least one insurance electric current C1 and a pallet pushes electric current D1.

Initial current A1 is the initial size of current of holding tray motor 14.

Falling motor current B1 is to fall Spindle Motor 36 in order to driving tray motor 14.Fall motor current B1 and be connected in after the initial current A1, the size of falling motor current B1 is low than the size of current of initial current A1.

Be connected in and fall after the motor current B1, the size of insurance electric current C1 is fallen the size of current of motor current B1 for high.Can't overcome

clamp

38 and 3602 interactional magnetic force of magnetic part when falling the power that motor current B1 produced, thereby can't fall Spindle Motor 36 time, insurance electric current C1 in order to driving tray motor 14 to fall Spindle Motor 36.Preferable design can be divided into a plurality of paragraphs that edge up with insurance electric current C1.

Be connected in after the insurance electric current C1, the size of current that the size that pallet pushes electric current D1 is insured electric current C1 is low, pallet push electric current D1 in order to driving tray motor 14 to push pallet 32.So, make falling of Spindle Motor 32 obtain more suitable driving force.

Therefore, be used in the CD-ROM device 30 in order to separate clamp seat 34 structures of clamp 38 and Spindle Motor 36 by the present invention, utilize 38 set bulge-structures 3404 of clamp seat 34 and clamp and protruding elastic construction 3406, when clamp 38 is separated with Spindle Motor 36, make horizontally disposed clamp 38 tilt, to reduce Spindle Motor 36 and the impulsive force that clamp 38 times of releasing produce, fall the noise that bump thrust bearing 20 is sent to slow down Spindle Motor 36.Further, control utilizes the less insurance electric current C1 that falls motor current B1 and edge up in order to separate holding tray motor 14 size of current of clamp 38 and Spindle Motor 36, similarly can reduce the impulsive force that the Spindle Motor 36 and clamp 38 times of releasing produce.

By the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and is not to come category of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope can contain in the category that is arranged in the claim that the present invention applies for of various changes and tool equality.

Claims

1. CD-ROM device comprises:

One clamp is arranged at this clamp seat top;

2. CD-ROM device as claimed in claim 1 is characterized in that, wherein this bulge-structure and the relative position that should the projection elastic construction be fixedly set in contiguous this clamp seat circular hole edge upper surface of this clamp seat, and contact with the below, edge of this clamp.

3. CD-ROM device as claimed in claim 1 is characterized in that, wherein this bulge-structure and the relative position that should the projection elastic construction be fixedly set in the rim under surface of this clamp, and contact with the upper surface at contiguous this clamp seat circular hole edge of this clamp seat.

4. CD-ROM device as claimed in claim 1 is characterized in that this CD-ROM device also comprises an opening, and this opening passes in and out this CD-ROM device for this pallet, and wherein this bulge-structure is than contiguous this opening of this projection elastic construction.

5. CD-ROM device as claimed in claim 4 is characterized in that, this CD-ROM device also comprises: