JP2003109366A - Driving unit for recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device for a recording medium in which rattle noise does not occur in a mechanism for constraining a drive unit as necessary and the degree of freedom of design and its shape factor are not adversely affected. SOLUTION: A pair of sliders 41 and 42 disposed on an elevating/lowering base 21 in a slidable way support the drive unit 30 through a damper 50 with a pin attached thereto, an outer shell member 51 of the damper 50 is provided with an elastic deforming part 53 and a rigid part 52. When the sliders 41 and 42 are slidingly moved to a prescribed position, the elastic deforming part 53 is elastically deformed so that a pin-attached part 53a for holding and supporting one end part of the pin 55 come into a constraint recessed part 52b of the rigid part 52. Thus, the movement of the pin 55 is controlled within the damper 50, and therefore, the drive unit 30 can be held while the drive unit 30 is constrained on the elevating/lowering base 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device used by loading, for example, a disk-shaped recording medium (CD, DVD, etc.), and particularly restrains the driving unit when loading or ejecting the recording medium. The present invention relates to a recording medium driving apparatus suitable for mounting on a vehicle, which is positioned in advance and supports the driving unit in a floating state at the time of reproducing information from or recording information on the recording medium to reduce the influence of external vibration.

[0002]

2. Description of the Related Art FIG. 9 is an operation explanatory view showing an example of a conventionally known on-vehicle disc device. In this disc device, a plurality of trays T are pulled out inside a magazine M loaded in the device. Freely installed, individual tray T
A disc D is placed on top. A drive unit 1 is arranged in the apparatus so as to face the loading position of the magazine M. The drive unit 1 includes a drive chassis 2 and
The drive chassis 2 is provided with a clamp arm 5 rotatably supported via a shaft 7. The drive chassis 2 supports a rotary table 3, a spindle motor 4 that rotationally drives the rotary table 3, an optical pickup (not shown), and the like. Also, the clamp arm 5
A clamper 6 is rotatably supported on the.

In the disk device having the above general structure, one of the trays T of the magazine M is selected by appropriately moving the drive unit 1 in the vertical direction in the drawing. FIG. 9A shows a state in which the drive unit 1 has stopped the tray T at the selected position.
In this state, the clamp arm 5 is rotationally moved upward, and the selected tray T is pulled out from the magazine M toward the drive unit 1. After that, when the clamp arm 5 is rotationally moved downward, As shown in FIG. 3B, the central portion of the disk D on the tray T is clamped on the rotary table 3 by the clamper 6. Then, since the tray T is returned to the magazine M in accordance with this clamping operation, the clamped disk D can be rotationally driven by the spindle motor 4. Further, when returning the disc D, which has been rotationally driven, into the magazine M, the empty tray T is pulled out to the drive unit 1 side and placed under the disc D, and then the clamp arm 5 is lifted to move the clamper. When 6 is separated from the disc D, the unclamped disc D is placed on the tray T, and the tray T is returned to the magazine M.

By the way, in the vehicle-mounted disc device, when the disc D is clamped and driven to rotate as shown in FIG. 9B, the vibration of the vehicle body does not adversely affect the drive operation of the disc D. Therefore, the drive unit 1 needs to be supported in a floating state (non-restraint state) by the buffer member 8 such as a damper and the coil spring 9. Further, as shown in FIG. 9 (A), the magazine M
When the disk D is pulled out from the inside or when the disk D on the rotary table 3 is returned into the magazine M, the drive unit 1 must be accurately positioned with respect to the magazine M at the loading position. It is necessary to restrain the drive chassis 2 supported by.

As a means for restraining the drive unit 1 supported in such a floating state when necessary, conventionally, a plurality of restraint levers capable of latching the drive chassis 2 are arranged outside the drive unit 1. The mechanism was widely adopted. However, if a region for operating the plurality of restraint levers is secured around the drive unit 1, the arrangement space for other components is significantly restricted, which lowers the degree of freedom in design and hinders downsizing. .

Therefore, as another conventional technique, a pair of sliders having a restraining groove are slidably provided on a base on which a cushioning member is installed, and these sliders are slid to a predetermined position on the base. A restraint means is known in which a plurality of pins projecting from both sides of a drive unit enter the restraint groove and are restrained. According to such a conventional technique, it is not necessary to secure a region for operating the restraint lever around the drive unit, so that the degree of freedom in design is improved and the space factor is improved.

[0007]

The latter prior art described above can be expected to improve the degree of freedom in design and space factor as compared with the prior art in which a plurality of restraining levers are operated to restrain the drive unit. Although it has the advantage, it is not without problems. That is, since the pin slides in the restraint groove of the slider and there is a slight clearance between the pin and the restraint groove, when the vehicle body vibration is applied, the metal pin vibrates in the restraint groove. However, there is a problem in that so-called rattle noise, which is a rattling noise that easily makes a rattling sound, collides with a metal slider. In order to reduce such rattle noise, it is not preferable to set the size so that the pin is press-fitted into the restraint groove, because the sliding resistance increases, which promotes wear and malfunction of the slider.

The present invention has been made in view of the above-mentioned circumstances of the prior art, and an object thereof is to prevent rattle noise from being generated in a mechanism for restraining a drive unit when necessary, and
It is an object of the present invention to provide a recording medium drive device that does not impair the degree of freedom in design and space factor.

[0009]

As a means for achieving the above object, according to the present invention, a member disposed so as to be movable relative to a drive unit is driven via a damper to which a pin is connected. While trying to support the unit,
An elastically deformable portion and a rigid portion are provided on the outer shell member of this damper,
When the above member is moved relative to the drive unit in a predetermined direction, the pin mounting portion to which the tip end of the pin is attached is inserted into the restraining recess of the rigid portion as the elastically deforming portion is deformed. When the pin mounting portion enters the restraining recess of the rigid portion in this way, the movement of the pin in the damper is restricted, so that the drive unit can be held in a restrained state with respect to the member. Moreover, since the pin mounting portion of the elastically deforming portion is interposed between the tip end portion of the pin and the restraining recess portion of the rigid portion in such a restrained state, even if vibration is applied from the outside, the rattle is between the member and the pin. There is no fear of noise.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a driving unit for recording and / or reproducing information on a recording medium, a member arranged so as to be movable relative to the driving unit, and a driving unit for driving these members. A pin fixed to either one of the unit and the member, and a damper encapsulating a viscous material fixed to the other one are provided, and the drive unit connects the damper to the damper by connecting the pin to the damper. In the driving device for the recording medium supported by the member via the elastic deformation part having a pin mounting part to which the tip end of the pin is attached to the outer shell member of the damper, compared to the elastic deformation part. And a rigid portion having a restraining concave portion on one side thereof is provided, and when the member relatively moves in a predetermined direction with respect to the drive unit, the pin removal is accompanied by the deformation of the elastically deformable portion. By part enters into the restraining recess, the pin is configured to be catching on the rigid part.

In the drive device thus constructed, when the pin mounting portion of the damper does not enter the restraining recess of the rigid portion, the damper is driven by the deformation of the elastically deforming portion and the viscous resistance of the viscous material. The unit is supported in a floating state with respect to the above members. on the other hand,
When the member is relatively moved in a predetermined direction with respect to the drive unit and the pin mounting portion enters the restraining recess of the rigid portion, the movement of the pin mounted in the pin mounting portion is restricted in the damper. Is constrained with respect to the member, the position of the drive unit can be regulated, and the pin is constrained in the constraining recess via the pin mounting portion, so that the pin does not move even when external vibration is applied. There is no risk of rattle noise. Further, in this way, by using the damper that supports the drive unit in the floating state, the drive unit can be restrained,
Since it is not necessary to secure a region for operating another member such as the restraint lever around the drive unit, the degree of freedom in design and the space factor are improved.

As an example of the outer shell member of the damper having the elastically deformable portion and the rigid portion, a molded product in which the elastically deformable portion made of an elastic material and the rigid portion made of a plastic material are integrated is preferable. As another example, the thin portion of the outer shell member made of an elastic material may be the elastically deformable portion, and the thick portion may be the rigid portion. At that time, an elastic portion for closing the restraining recess is provided on one side of the elastically deformable portion of the damper, and the elastic portion has a plurality of recesses extending in a direction substantially orthogonal to the relative movement direction of the drive unit and the member. If the groove is formed, the elastic portion can be largely elastically deformed, so that the pin attaching portion can be easily inserted into the restraining concave portion, which is preferable.

[0013]

EXAMPLES Examples will be described with reference to the drawings.
1 is a perspective view showing a disk drive mechanism of a vehicle-mounted disk device according to an embodiment of the present invention, FIG. 2 is a side view of the disk device, and FIG. 3 is a disk drive mechanism shown in FIG. 4 is a perspective view of the back surface side, FIG. 4 is a structural explanatory view of a damper and a pin of the disk device, FIG. 5 is an external view of the damper, FIG. 6 is a vertical sectional view of the damper, and FIG. 7 is a lateral sectional view of the damper. FIG. 8 is an explanatory view showing a state in which the pin is held in the restraining recess of the damper.

As shown in FIG. 2, the vehicle-mounted disc device according to the present embodiment has a nose 11 as a decorative portion provided on the front part of the housing 10, and the nose 11 is openably and closably covered. The magazine M is inserted from the insertion opening (not shown) to the loading position in the housing 10. The magazine M is a box body having an opening M1 formed on the left side of FIG. 2, and a plurality of trays T are housed therein so as to be freely drawn out. A disc D such as a CD or a DVD is placed on each tray T. An elevating unit 20 is provided at the back of the housing 10. In the elevating unit 20, the elevating base 21 is provided.
The drive unit 30 is supported above the pair of sliders 41, 42 and the like.

As shown in FIG. 2, vertically extending guide grooves 10a are formed in both side plates of the housing 10, and guide pins 22 projecting from both sides of an ascent / descent base 21 are provided with these ascending and descending means. Since it is inserted in the guide groove 10a, the housing 1
In 0, the lifting unit 20 is supported so as to be lifted and lowered. The selective drive plate 23 is provided outside the one side plate of the housing 10.
Is provided, and the selection drive plate 23 is supported so as to be movable in the left-right direction in FIG. Although not shown, the housing 10
A similar selective drive plate is also provided outside the other side plate of the. A selection drive unit (not shown) that drives both of the selection drive plates is provided on the bottom of the housing 10.
The selection drive plate 23 has a selection hole 23a formed in a stepped shape, and the lifting base 21 is placed in the selection hole 23a.
The guide pin 22 that is provided so as to project in is inserted. Then, when the selection drive plate 23 moves to the back side of the housing 10, the elevating unit 20 is guided by the selection hole 23a, and conversely, when the selection drive plate 23 moves to the front side of the housing 10, the selection hole. The elevating unit 20 is raised by being guided by 23a. Also, the lifting unit 20 is a magazine M
When any one of the trays T inside is stopped at a position where it can be selected, the guide pin 22 is located at any horizontal portion of the selection hole 23a.

As shown in FIGS. 1 and 3, the elevating base 21 is integrally formed with a bottom plate 21a and side plates 21b and 21c which are bent so as to stand up on both sides of the bottom plate 21a. A first slider (member) 41 and a second slider (member) 42 are provided on the bottom plate 21a X1-.
It is provided so that it can slide in the X2 direction, and
A connecting member 43 having connecting pins 43a and 43b at both ends is provided rotatably around a support shaft (not shown). One connecting pin 43a of the connecting member 43 is engaged with the first slider 41, and the other connecting pin 43b is engaged with the second slider 42. A cam gear 44 is axially supported on the bottom plate 21a, and a follower shaft 45 fixed to the first slider 41 is slidably inserted into a cam groove 44a formed in the cam gear 44. ing.
Then, the switching motor 46 mounted on the lifting base 21
When the cam gear 44 is rotationally driven in the forward and reverse directions by the first slider 41, the first slider 41 moves in the X1 direction or the X2 direction, and accordingly, the second slider 42 is separated from the first slider 41 via the connecting member 43. It is designed to move in the opposite direction.

Two dampers 50 are fixed to each of the first and second sliders 41 and 42, and metal pins 55 projecting from a total of four locations on both sides of the drive unit 30 are respectively provided. Corresponding damper 5 as shown in FIG.
It is press-fitted and fixed at 0. The damper 50 is an outer shell member 51.
The outer shell member 51 is a molded product in which a rigid portion 52 and an elastically deformable portion 53 are integrated, as shown in FIGS. 5 to 7. is there. The rigid portion 52 is made of a hard plastic material that is not easily elastically deformed, and the bottom plate portion 52a thereof has the first slider 41 or the second slider 41a.
It is an attachment portion fixed to the slider 42. In addition, a restraining recess 52b protruding in a U-shape in plan view is formed on one side of the rigid portion 52. On the other hand, the elastically deformable portion 53 is made of a material such as rubber or elastomer that is easily elastically deformed. The elastically deformable portion 53 has a bottomed cylindrical pin attachment portion 53a for press-fitting and holding the tip portion of the pin 55. A stretchable portion 53b having a plurality of recessed grooves 53c for closing the restraining recessed portion 52b of the rigid portion 52 is formed. When the first and second sliders 41, 42 are located on the bottom plate 21a of the elevating base 21 at the positions shown in FIG. 1, the pin 55 is held at the substantially central portion of the corresponding damper 50. When the slider 41 moves in the X2 direction and the second slider 42 moves in the X1 direction, the pin 55 relatively moves toward the restraining recess 52b of the damper 50, so that the elastic deformation portion 53 elastically deforms. The pin mounting portion 53a is press-fitted into the restraining recess 52b. Since the elastic portion 53b of the elastically deformable portion 53 has a plurality of grooves 53c extending in a direction substantially orthogonal to the X1-X2 direction, the first and second sliders 41, 42 slide and move. Accordingly, the elastic deformation portion 53 can be easily elastically deformed.

Drive chassis 31 of drive unit 30
Includes a rotary table 33 on which the disk D is mounted, and a spindle motor 3 that rotationally drives the rotary table 33.
4 and an optical pickup 35 for reproducing and recording information on the disk D on the rotary table 33. Although not shown, a clamp arm equipped with a clamper is rotatably supported by the drive chassis 31, and the clamper 36 can be pressed toward the rotary table 33 by the spring force of the clamp spring 36. There is. Further, the drive unit 30 is elastically suspended and supported by the elevating unit 20 by a plurality of coil springs (not shown).

A support shaft 60 is attached to the bottom plate 21a of the lifting base 21.
Is fixed, and a rotary engaging body 61 having a cross shape in a plan view is rotatably supported on the support shaft 60, and an elongated hole 62a is formed in a drive plate 62 integrated with the rotary engaging body 61. A drive pin (not shown) fixed to the first slider 41 is slidably inserted into the elongated hole 62a.
With the sliding movement of the slider 41, the rotary engagement body 61 is rotated via the drive plate 62. The drive unit 30 includes a drive chassis 31 and
A through hole 32 that penetrates the resin chassis 37 fixed to the lower surface of the drive chassis 31 is formed, and the rotary engagement body 61 is inserted into the through hole 32. Through hole 3
There are four locations on the inner wall surface of the resin chassis 37 that appears at 2,
A bulging portion 37a that protrudes inward is provided, and when the rotary engagement body 61 reaches a predetermined rotation position within the through hole 32,
Each of the cross-shaped projecting end portions of the rotary engaging body 61 has a resin chassis 3
The bulging portions 37a of the drive unit 7 are brought into close contact with each other without any clearance so that the vicinity of the through hole 32 of the drive unit 30 is restrained by the elevating base 21.

Next, the operation of the disk device configured as described above will be described. In the standby state before selecting the tray T and the disk D in the magazine M, the first operation on the elevating base 21 shown in FIG. The slider 41 is moving to the X2 side, and the second slider 42 is moving to the X1 side. Therefore, the pins 55 projectingly provided on both sides of the drive chassis 31 are relatively moved to the corresponding restraining recess 52b side of the damper 50, and as shown in FIG. The pin mounting portion 53a that is being held
Is press-fitted into the restraining recess 52b, and movement of the pin 55 in the damper 50 in the vertical direction and the front-back direction (X1-X2 direction) is restricted. That is, both sides of the drive unit 30 are in a state of being restrained by the elevating base 21 via the first and second sliders 41 and 42. At this time, the rotary engagement body 61 that rotates in conjunction with the first slider 41 also abuts on each bulging portion 37a of the resin chassis 37 and restrains the vicinity of the through hole 32 of the drive unit 30 in the front-rear and left-right directions. Therefore, after all, the position of the drive unit 30 on the elevating base 21 is accurately defined. In addition, the pin 55 is fixed to the restraining recess 52 through the pin mounting portion 53a.
Since it is restrained by b, there is no fear that the pin 55 will generate rattle noise even if vibration is applied from the outside. In this standby state, the clamp arm (not shown) is pushed up by the clamp cam 41a (see FIG. 1) of the first slider 41, so the clamper (not shown) is moving above the rotary table 33. Then, the operation of selecting the tray T in the magazine M is performed.

In this selection operation, the selection drive plate 23 provided on the side surface of the casing 10 shown in FIG. 2 moves in the X1-X2 direction, and the selection hole 23a of the selection drive plate 23 moves the lifting unit 20 up and down. Will be guided to. Then, the selection drive plate 23 stops in a state where the lifting unit 20 faces the front of the tray T to be selected in the magazine M, and the tray T is pulled out from the magazine M in the X1 direction. At this time, since the drive unit 30 is positioned on the elevating base 21 by being restrained by the restraining recess 52b of the damper 50 and the rotary engaging body 61, the pulled-out disc D on the tray T is correctly placed on the rotary table 33. Can be made. In this way, when the center of the disc D coincides with the center of the rotary table 33, the clamp operation is started and the disc D
Is clamped by the rotary table 33 and the clamper, and the empty tray T is returned to the magazine M. Further, when the clamp operation is started, the cam gear 44 on the elevating base 21 rotates, the first slider 41 moves in the X1 direction, and the second
Slider 42 moves in the X2 direction. As a result, the pin mounting portion 53a press-fitted into the restraining recess 52b moves to the position shown in FIG. 4, and the pin 55 is elastically supported by the elastically deforming portion 53 of the damper 50 and the viscous material. Since the rotary engagement body 61 rotates to a position where it does not come into contact with the inner wall surface of the resin chassis 37, at the time when the clamping operation is completed, the drive unit 30 moves up and down via the pin 55 and the damper 50 as shown in FIG. 21 will be supported in a floating state. In this state, the disk D on the rotary table 33 is rotationally driven by the spindle motor 34, and the optical pickup 35 reproduces and records information on the disk D.
Further, in such a floating state, vibration externally applied to the drive unit 30 is damped by the elastic deformation of the elastic deformation portion 53 of the damper 50 and the viscous resistance of the viscous material. It is less likely to have an adverse effect.

When the rotation drive of the disk D is completed, the empty tray T in the magazine M is pulled out to the lower side of the disk D clamped on the rotary table 33. At this time, the cam gear on the elevating base 21 is moved. 44 rotates, the first slider 41 moves in the X2 direction, and the second slider 42 moves in the X1 direction. As a result, the pin mounting portion 53a of the damper 50 is press-fitted into the restraining recess 52b, and
Since the rotary engagement body 61 contacts each bulging portion 37a of the resin chassis 37, the drive unit 30 is restrained by the elevating base 21, and the unclamped disc D is surely placed on the lower tray T. Can be made. Then, the tray T on which the disc D is thus placed is returned to the magazine M.

In the embodiment described above, as the outer shell member 51 of the damper 50, a molded product in which an elastically deformable portion 53 made of an elastic material and a rigid portion 52 made of a hard plastic material are integrated is used. The present invention is not limited to this. For example, the outer shell member 51 made of only an elastic material may be used, and the thin portion thereof may be the elastically deformable portion and the thick portion may be the rigid portion.

Further, in the above-described embodiment, the pins 55 fixed to both sides of the drive unit 30 are provided with the sliders 41 and 42.
Although it is configured to be supported by the damper 50 fixed to
On the contrary, the damper 50 fixed to the drive unit 30
May be supported by a pin 55 fixed to the sliders 41 and 42. Further, the damper 50 or the pin 55
Is fixedly arranged, and the pin 55 or the damper 50 is fixed to the drive unit 30.
The pin 55 may be fitted into the restraining recess 52b of the damper 50 by moving the pin in the X1-X2 direction. In this case, since the slider does not move, the damper 50 or the pin 55 may be directly fixed to the elevating base 21.

Further, in the above-mentioned embodiment, the magazine M accommodating a plurality of disks is inserted into the casing 10,
The so-called disc changer, which selects and drives one disc from the magazine M, has been explained.
The present invention is also applicable to a normal disc player in which discs are inserted one by one into the housing 10 and driven.

[0026]

The present invention is carried out in the form as described above, and has the following effects.

When the pin mounting portion of the damper to which the tip of the pin is mounted enters the restraining recess of the rigid portion, the movement of the pin in the damper is restricted and the drive unit is restrained against the member. It is possible to shift the drive unit that was supported in the floating state to the restrained state,
The position of the drive unit can be defined. At this time, since the pin is restrained in the restraining recess via the pin attaching portion of the damper,
Even if vibration is applied from the outside, there is no possibility that the pin will generate rattle noise. In addition, if the drive unit is constrained by using the damper that supports the drive unit in a floating state, it is necessary to secure a region around the drive unit in which another member such as the constraining lever is operated. Therefore, the degree of freedom in design and the space factor are improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a disk drive mechanism of a vehicle-mounted disk device according to an embodiment.

FIG. 2 is a side view of the disc device.

3 is a perspective view of the back surface side of the disk drive mechanism shown in FIG. 1 with the lifting base omitted.

FIG. 4 is a structural explanatory view of dampers and pins of the disk device.

FIG. 5 is an external view of the damper.

FIG. 6 is a vertical sectional view of the damper.

FIG. 7 is a cross-sectional view of the damper.

FIG. 8 is an explanatory view showing a state in which a pin is held in a restraining recess of the damper.

FIG. 9 is an operation explanatory diagram showing an example of a conventional vehicle-mounted disc device.

[Explanation of symbols]

10 housing 20 lifting unit 21 Lifting base 30 drive unit 31 drive chassis 33 turntable 34 Spindle motor 35 Optical pickup 41 First Slider 42 Second slider 43 Connection member 44 cam gear 50 damper 51 Outer shell member 52 Rigid part 52b Restraint recess 53 Elastic deformation part 53a Pin mounting part 53b Telescopic part 53c concave groove 55 pin D disk M magazine T tray

Claims (4)

[Claims] 1. A drive unit for recording and / or reproducing information on a recording medium, a member disposed so as to be movable relative to the drive unit, and any one of the drive unit and the member. A pin fixed to one side and a damper that fixes the viscous material fixed to the other one are provided, and the drive unit is supported by the member via the damper by connecting the pin to the damper. In the driving device for the recording medium, an elastic deforming portion having a pin attaching portion to which the tip end portion of the pin is attached to the outer shell member of the damper, and an elastic deforming portion that is less likely to elastically deform than the elastic deforming portion. A rigid portion having a restraining recess is provided on a side portion, and when the member relatively moves in a predetermined direction with respect to the drive unit, the pin mounting portion causes the restraining recess to move in accordance with the deformation of the elastically deforming portion. By entering, driving device for a recording medium, wherein the pin is configured to be catching on the rigid part. 2. The outer shell member of the damper according to claim 1, which is a molded product in which the elastically deformable portion made of an elastic material and the rigid portion made of a hard plastic material are integrated. Drive device for recording medium. 3. The damper according to claim 1, wherein the outer shell member of the damper is made of an elastic material, the thin portion of the elastic material serves as the elastically deformable portion, and the thick portion of the elastic material serves as the rigid portion. A recording medium drive device characterized by the above. 4. The expansion / contraction part for closing the restraining recess on one side of the elastically deformable part of the damper, and the expansion / contraction part includes the member and the drive member. A drive device for a recording medium, wherein a plurality of recessed grooves extending in a direction substantially orthogonal to the relative movement direction of the unit are formed.