JP2008181605A - Disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To alleviate the impact when the tray stops at the most advanced position. <P>SOLUTION: A drive pinion 4 is externally fit, so as to be rotatable in both directions, to the support shaft 3 erected on the front end plate 2a of the loader chassis 2 supporting the tray 1 to load a disk. A tray rack 5 integrally protruding under the tray 1 engages with the drive pinion 4. The drive pinion 4 is externally fit to the shaft 3 to move up and down within a certain range by forming a gap α between the drive pinion 4 and the front end plate 2a, and a spring 36 is set in the gap α to energize the pinion 4 upward. The teeth 4a, 5a of the drive pinion 4 and the tray rack 5 are formed in helical teeth. While turning the drive pinion 4 in a forward direction to bring each hook of the tray 1 contact with the stopper to stop this tray 1 at the most advanced position, the drive pinion 4 rotates normally along the tooth 5a of the tray rack 5 and moves down to compress the spring 36. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a disk device such as a DVD player or a DVD recorder, and in particular,
The impact is reduced when the tray is stopped at the most advanced position.

An example of the disk device is shown in FIGS. 4 to 6, which is a DVD player, FIG. 4 is a plan view in the play mode, FIG. 5 is a longitudinal sectional view, and FIG. 6 is when the tray is opened. It is a top view.

As shown in FIGS. 4 and 5, the disk D mounting tray 1 is disposed on the loader chassis 2 so as to be able to move forward and backward a and b, and a drive pinion is mounted on a support shaft 3 erected on a front end plate 2 a of the loader chassis 2. 4 is externally fitted so as to be capable of forward and reverse rotations c and d, a tray rack 5 integrally projecting from the lower surface of the tray 1 is formed so as to be able to mesh with the drive pinion 4, and a worm wheel 6 is formed below the drive pinion 4. A worm gear 8 that is integrally formed and rotated forward and backward by a loading motor 7 is engaged with the worm wheel 6.

As shown in FIG. 5, the rear part of the traverse chassis 10 arranged in the loader chassis 2 is connected to the loader chassis 2 via a rear elastic body 11 made of rubber so that it can move up and down e and f. Elevating body 13 through front elastic body 12 whose front part is made of rubber.
It is connected to.

As shown in FIGS. 4 to 6, a cam section 15 having a substantially T-shaped longitudinal section is disposed on the front end plate 2a of the loader chassis 2 so as to be slidable in the left and right directions g and h perpendicular to the forward and backward a and b directions. A pair of cam grooves 16a formed in the vertical portion of the cam slider 15, and a pair of cam pins 16b that project integrally with the front surface of the elevating body 13 and fit into the cam grooves 16a through the vertical grooves 17 of the front end plate 2a; The cam slider 15 and the elevating body 13 are interlocked and connected by a cam mechanism 16 comprising a cam rack 18 formed integrally with one end of the cam slider 15 so as to be able to be engaged with the drive pinion 4, and a pair of cam racks 15 on the horizontal portion of the cam slider 15. The guide pins 19 are integrally projected, and a pair of guide grooves 20 are formed on the front surface of the lower surface of the tray 1 so as to face the guide pins 19.

As shown in FIGS. 4 and 5, a turntable 22 is provided at the front of the traverse chassis 10.
And an optical pickup 24 with an objective lens OL is arranged in the center of the traverse chassis 10 so as to be movable along the radial direction of the disk D. The optical pickup 24 moves the rack and pinion 25. Through the feed motor (not shown)
It is linked to.

As shown in FIG. 4, hooks 26 are integrally provided at the rear ends of both side surfaces of the tray 1,
Opposite the hooks 26, there are provided elastically displaceable stoppers 27 extending rearward from the front ends of the side plates 2 b of the loader chassis 2. Further, as shown in FIG. 5, a clamper 30 is fitted in a central through hole 29a of a cross beam 29 provided between both side plates 2b of the loader chassis 2 so as to be movable up and down within a certain range. Reference numeral 31 denotes a central opening formed in the center of the tray 1.

In the play mode, as shown by the solid lines in FIGS. 4 and 5, the tray 1 moves backward b and is stored in the loader chassis 2, and the cam slider 15 is slid in the direction of the arrow g. The traverse chassis 10 is moved up to a horizontal posture to lift the disc D on the tray 1 by the turntable 22, and the disc D is clamped by the turntable 22 and the clamper 30. Subsequently, the disk D is rotated at high speed by the spindle motor 23 via the turntable 22, and information recorded on the disk D is read by the optical pickup 24.

When the tray is opened, the optical pickup 24 is moved forward toward the center of the disk D through the rack and pinion 25 by a feed motor (not shown) as shown in phantom lines in FIG. 5 and FIG. The cam slider 15 is slightly slid in the direction of arrow h by a trigger mechanism (not shown), and the cam rack 18 is engaged with the drive pinion 4. Thereafter, the loading motor 7 is driven by a timer control for a predetermined time (for example, 2 to 5 seconds), thereby causing the drive pinion 4 to rotate forward c via the worm gear 8 and the worm wheel 6,
The cam slider 15 is slid in the direction of arrow h. Thus, the disk D is transferred from the turntable 22 to the tray 1 by moving the traverse chassis 10 downwardly through the cam mechanism 16 and the lifting body 13 into an inclined posture.

Subsequently, the inclined surface 20a of each guide groove 20 is pushed by each guide pin 19 so that the tray 1 is slightly advanced a, the front end of the tray rack 5 is engaged with the drive pinion 4, and the cam rack 18 is driven almost simultaneously. The tray 1 is separated from the pinion 4, and the tray 1 is advanced a through the tray rack 5 by the forward rotation c of the drive pinion 4, and each hook 26 of the tray 1 is moved to each stopper 2.
7, the tray 1 is stopped at the most advanced position a. At the time of tray-in, the operation is performed in the reverse procedure.

7 and 8 show a conventional example. FIG. 7 (a) is an enlarged cross-sectional view of the main part, FIG.
(B) is a BB arrow line view, FIG. 8 is an exploded perspective view of the principal part.

As shown in FIG. 7, the support shaft 3 is composed of a columnar support shaft main body 3a, a head 3b and a male screw portion 3c that are concentrically integrated with the upper and lower ends of the support shaft main body 3a. 3 is inserted into the center hole 33 formed by the small diameter portion 33a and the large diameter portion 33b of the drive pinion 4, the male screw portion 3c is screwed into the screw hole 34 of the front end plate 2a, and the head portion 3b is inserted into the small diameter portion 33a and the large diameter portion 33b. Step 3 between
The drive pinion 4 is positioned on the front end plate 2a by being brought into contact with or approaching 3c, and the drive pinion 4 is prevented from being moved up and down along the support shaft 3.

As shown in FIGS. 7 and 8, the teeth 4a and 5a of the drive pinion 4 and the tray rack 5,
The teeth 18a of the cam rack 18 are formed in a spur gear shape. In addition, there exists what was described in patent document 1 as a related technique.
JP 2004-348882 A

In the above-described conventional configuration, when the tray is opened, the drive pinion 4 is rotated forward c for a predetermined time (for example, 2 to 5 seconds) by timer control, and each hook 26 of the tray 1 is brought into contact with each stopper 27 so that the tray 1 Even after stopping at the most advanced position a, a short time (for example, 0.1 to
0.5 second), but the drive pinion 4 continues to be driven. At that time, the drive pinion 4 and the teeth 4a and 5a of the tray rack 5 are formed in a spur gear shape, and the drive pinion 4 is not rotated. Therefore, the driving force of the driving pinion 4 is repeatedly applied to each stopper 27 every time the tray is opened. For this reason, an unpleasant collision sound is generated, and the base portion of each stopper 27 is damaged by overload, making it difficult to stop the tray 1 in the predetermined position at the most forward position a, or the boss of the drive pinion 4 Drive transmission system components such as the portion 4b (see FIG. 7) may be damaged by overload.

The present invention has been made in view of the above-described conventional drawbacks, and an object of the present invention is to provide a disk device that can mitigate an impact when the tray is stopped at the most advanced position.

In order to achieve the above object, according to the first aspect of the present invention, a disk mounting tray is disposed so as to be able to move forward and backward in a loader chassis, and a drive pinion is forward and backward on a support shaft standing on the front end plate of the loader chassis A tray rack that is rotatably fitted and is integrally formed on the lower surface of the tray along the forward and backward direction is formed so as to be able to mesh with the drive pinion, and a traverse chassis equipped with a turntable and an optical pickup is provided in the loader chassis. In the play mode, a hook is integrally provided at the rear end of both side surfaces of the tray, and a pair of stoppers are provided at the front of the loader chassis so as to face each hook. Move the traverse chassis up to a horizontal position to lift the disc on the tray with the turntable and Rotate the disc at high speed, read the information recorded on the disc with an optical pickup, and when the tray is open, move the disc from the turntable to the tray by lowering the traverse chassis to make it tilted, and with timer control The drive pinion is rotated forward for a predetermined time, the tray is advanced through a tray rack meshing with the drive pinion, and the tray is stopped at the most advanced position by contacting each hook with each stopper. In the disk apparatus, an annular groove concentric with the support shaft is formed in the front end plate of the loader chassis, and a gap is formed between the drive pinion and the front end plate of the loader chassis so that the drive pinion is A spring that is externally fitted to the spindle so as to be able to move up and down within a certain range and urges its drive pinion upward The lower end of the drive pinion and the tray rack are interspersed with a gap, and the tooth portions of the drive pinion and the tray rack are formed in a helical shape. The inclination angle of the tooth portions is 35 ° to 55 ° (preferably 40 ° to 50 °), the drive pinion is rotated forward, the hooks of the tray are brought into contact with the stoppers, and the tray is stopped at the most advanced position. It is characterized in that the spring is compressed while being rotated along the forward direction.

In the invention according to claim 2, the disk mounting tray is disposed so as to be able to move forward and backward in the loader chassis, and the drive pinion is fitted on the support shaft standing on the front end plate of the loader chassis so as to be able to rotate forward and backward. A tray rack integrally projecting along the forward / backward direction on the lower surface of the tray is formed so as to be able to mesh with the drive pinion, and a traverse chassis equipped with a turntable and an optical pickup is disposed in the loader chassis so as to be movable up and down. The tray is integrally provided with hooks at the rear ends of both side surfaces, and a pair of stoppers are provided at the front of the loader chassis so as to oppose the hooks, and the traverse chassis is moved up in the play mode. The horizontal position to lift the disc on the tray with the turntable and rotate the disc at a high speed with the turntable. The information recorded on the disc is read with an optical pickup, and when the tray is opened, the traverse chassis is moved down to an inclined position to transfer the disc from the turntable to the tray, and the drive pinion is corrected for a predetermined time by timer control. In the disk device, the tray is moved forward through a tray rack that is rotated and meshed with the drive pinion, and the tray is stopped at the most advanced position by bringing each hook of the tray into contact with each stopper. By forming a gap between the drive pinion and the front end plate of the loader chassis, the drive pinion is externally fitted to the support shaft so as to be able to move up and down within a certain range, and a spring for biasing the drive pinion upward is formed in the gap. The teeth of the drive pinion and the tray rack are formed in a helical shape, and the drive pinion The drive pinion is lowered and moved forward along the teeth of the tray rack while the tray is stopped at the most advanced position by turning on normally and causing each hook of the tray to come into contact with each stopper. It is characterized by compressing.

According to a third aspect of the present invention, in the second aspect of the present invention, the inclination angle of the teeth of the drive pinion and the tray rack is set to 35 ° to 55 ° (preferably 40 ° to 50 °). It is characterized by that.

The invention according to claim 4 is the invention according to claim 2 or 3, wherein an annular groove concentric with the support shaft and having the same diameter as the spring is formed in the front end plate of the loader chassis. The lower end of the spring is inserted into the spring.

The invention according to claim 1 corresponds to one embodiment (see FIGS. 1 to 3), and according to this, when the tray is opened, the drive pinion is rotated forward for a certain time by timer control, After stopping the tray at the most advanced position by bringing each hook of the tray into contact with each stopper, the drive pinion continues along the teeth of the tray rack by the drive pinion that is continued for a short time. The spring is lowered while rotating forward to compress the spring.By the cooperative action of the play action of the helical teeth and the brake action of the spring, conventionally, each stopper is repeatedly applied with an impact on each stopper. Can be relaxed. For this reason, no unpleasant collision noise is generated, and the base of each stopper is not damaged by overload as in the conventional case, and the tray can be stopped at a predetermined position at the most advanced position. Drive transmission system parts such as pinion bosses are not damaged by overload as in the prior art.

Here, when the inclination angle of the tooth portions of the drive pinion and the tray rack is less than 35 °, it is difficult to smoothly transmit the driving force from the drive pinion to the tray rack. When the inclination angle exceeds 55 °, it approximates to a drive pinion and a tray rack having conventional spur gear-like teeth, and the play action by the helical teeth is reduced, and the spring brake is applied. The effect cannot be exhibited effectively.

Therefore, in the present invention, the inclination angle of the teeth of the drive pinion and the tray rack is 35 ° to 5 °.
It is set to 5 ° (preferably 40 ° to 50 °), whereby the drive force from the drive pinion to the tray rack can be transmitted smoothly and reliably, and the play action by the helical teeth and the spring By the synergistic action with the brake action, it is possible to effectively mitigate the impact when the tray is stopped at the most advanced position.

Furthermore, by inserting the lower end of the spring into an annular groove formed in the front end plate of the loader chassis, the spring can be positioned substantially concentrically with the support shaft, so that the drive pinion that fits outside the support shaft does not tilt. The drive pinion can be lifted and lowered smoothly along the support shaft.

The invention according to claim 2 corresponds to the basic form. According to this, when the tray is opened, the drive pinion is rotated forward for a predetermined time by timer control, and each hook of the tray is brought into contact with each stopper. After the tray is stopped at the most advanced position, the drive pinion continues to move for a short time, but the drive pinion is lowered along the teeth of the tray rack while being moved forward. By compressing, and the play action by the helical teeth and the brake action by the spring, conventionally, the impact repeatedly applied to each stopper can be alleviated every time the tray is opened. For this reason, no unpleasant collision noise is generated, and the base of each stopper is not damaged by overload as in the conventional case, and the tray can be stopped at a predetermined position at the most advanced position. Drive transmission system parts such as pinion bosses are not damaged by overload as in the prior art.

In the invention according to claim 3, the inclination angle of the tooth portion of the drive pinion and the tray rack is 3
When the angle is less than 5 °, it becomes difficult to smoothly transmit the driving force from the driving pinion to the tray rack. When the inclination angle exceeds 55 °, it approximates to a drive pinion and a tray rack having conventional spur gear-like teeth, and the play action by the helical teeth is reduced, and the spring brake is applied. The effect cannot be exhibited effectively.

Therefore, in the present invention, the inclination angle of the teeth of the drive pinion and the tray rack is 35 ° to 5 °.
It is set to 5 ° (preferably 40 ° to 50 °), whereby the drive force from the drive pinion to the tray rack can be transmitted smoothly and reliably, and the play action by the helical teeth and the spring By the synergistic action with the brake action, it is possible to effectively mitigate the impact when the tray is stopped at the most advanced position.

According to the invention described in claim 4, the spring can be positioned substantially concentrically with the support shaft by fitting the lower end of the spring into the annular groove formed in the front end plate of the loader chassis. The drive pinion that fits externally can be pushed up almost evenly so as not to tilt, and the drive pinion can be smoothly raised and lowered along the support shaft.

1 to 3 show a disk apparatus according to an embodiment of the present invention.
FIG. 1 (a) is an enlarged cross-sectional view of the main part, FIG. 1 (b) is an AA arrow view,
2 is an exploded perspective view of the main part, FIG. 3A is a schematic side view showing the operation state, and FIG. 3B is an explanatory view showing the operation principle.

As shown in FIGS. 1 and 2, an annular groove 35 concentric with the support shaft 3 is formed in the front end plate 2 a of the loader chassis 2, and a gap α is formed between the drive pinion 4 and the front end plate 2 a of the loader chassis 2. As a result, the drive pinion 4 is externally fitted to the support shaft 3 so as to be movable up and down within a certain range, and a spring 36 that biases the drive pinion 4 upward is interposed in the gap α, and the lower end thereof is the annular groove 35. The teeth 4a and 5a of the drive pinion 4 and the tray rack 5 and the teeth 18a of the cam rack 18 are formed in a helical shape. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 4 to 8, the same reference numerals are given to the same portions and the description thereof is omitted.

When the tray is opened, the same operation as before is performed, and the traverse chassis 10 is moved downward.
After tilting (see the phantom line in FIG. 5), the tray 1 is advanced a through the tray rack 5 by the forward rotation c of the drive pinion 4, and the hooks 26 of the tray 1 are brought into contact with the stoppers 27. As shown in FIG. 3A, the drive pinion 4 descends while rotating along the tooth portion 5a of the tray rack 5 with the tray 1 stopped at the most advanced position a. The spring 36 is compressed.

According to the above configuration, when the tray is opened, the drive pinion 4 is rotated forward c for a predetermined time (for example, 2 to 5 seconds) by the timer control, and each hook 26 of the tray 1 is brought into contact with each stopper 27 so that the tray 1 For a short time (for example, 0.1 to 0.5).
Second), the drive pinion 4 is continuously lowered along the teeth 5a of the tray rack 5 to compress the spring 36 by driving the drive pinion 4 continuously.
By the cooperative action of the play action by the helical teeth and the brake action by the spring 36, it is possible to alleviate the impact repeatedly applied to each stopper 27 every time the tray is opened. For this reason, an unpleasant collision sound is not generated, and the root portion of each stopper 27 is not damaged by an overload as in the prior art, and the tray 1 can be stopped in a predetermined manner at the most advanced position a. In addition, the drive transmission system parts such as the boss 4b of the drive pinion 4 are not damaged by overload as in the prior art.

In addition, by inserting the lower end of the spring 36 into the annular groove 35 formed in the front end plate 2a of the loader chassis 2, the spring 36 can be positioned substantially concentrically with the support shaft 3.
The drive pinion 4 fitted on the support shaft 3 can be pushed up almost evenly so as not to tilt, and the drive pinion 4 can be smoothly moved up and down along the support shaft 3.

As shown in FIG. 3A, when the inclination angle β of the tooth portions 4a and 5a of the drive pinion 4 and the tray rack 5 is less than 35 °, the driving force is transmitted from the drive pinion 4 to the tray rack 5. It becomes difficult to perform smoothly. Further, when the inclination angle β exceeds 55 °, it approximates to the drive pinion 4 and the tray rack 5 provided with the conventional spur gear-like teeth 4a and 5a (see FIGS. 7 and 8). The play action by the helical teeth becomes small, and the brake action by the spring 36 cannot be exhibited effectively.

Therefore, in the present embodiment, the inclination angle β of the tooth portions 4a and 5a of the drive pinion 4 and the tray rack 5 is set to 35 ° to 55 ° (preferably 40 ° to 50 °). In the drawing, the inclination angle β Is set to 45 °.

FIG. 3B shows the operation principle when the inclination angle β is set to 45 °, and the drive pinion 4 is positive by a distance L1 (for example, 1 mm) in the circumferential direction along the tooth portion 5a of the tray rack 5. When the rotation c, the drive pinion 4 is lowered by the same distance L2 (for example, 1 mm) as the distance L1, and the spring 36 is compressed.

According to the above configuration, the inclination angle β of the tooth portions 4a and 5a of the drive pinion 4 and the tray rack 5 is as follows.
Is set to 35 ° to 55 ° (preferably 40 ° to 50 °), so that the drive pinion 4
The driving force can be smoothly and reliably transmitted from the tray rack 5 to the tray rack 5, and the tray 1 is stopped at the most advanced position a by the cooperative action of the play action by the helical teeth and the brake action by the spring 36. The impact can be effectively reduced.

(A) is an expanded horizontal sectional view of the principal part which shows the disc apparatus which is one Embodiment of this invention, (b) is an AA arrow directional view. It is a disassembled perspective view of the principal part. (A) is a schematic side view which shows the same operation state, (b) is explanatory drawing which shows the same operation principle. It is a top view in the play mode of a disc apparatus. It is the longitudinal cross-sectional view. It is a top view at the time of the tray opening. (A) is an expanded horizontal sectional view of the principal part which shows a prior art example, (b) is a BB arrow directional view. It is a disassembled perspective view of the principal part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tray 2 Loader chassis 2a Front end plate of loader chassis 3 Support shaft 4 Drive pinion 4a Teeth of drive pinion 5 Tray rack 5a Teeth of tray rack 10 Traverse chassis 22 Turntable 24 Optical pickup 26 Hook 27 Stopper 35 Annular groove 36 Spring α Clearance β Tooth inclination angle D Disc a, b Forward / backward c, d Forward / reverse rotation

Claims (4)

A disk mounting tray is disposed on the loader chassis so as to be able to move forward and backward, and a drive pinion is externally fitted on a support shaft erected on the front end plate of the loader chassis so as to be able to rotate forward and backward. A tray rack integrally protruding along the drive pinion is formed so as to be able to mesh with the drive pinion, and a traverse chassis on which a turntable and an optical pickup are mounted is arranged in the loader chassis so as to be movable up and down. A hook is integrally projected, and a pair of stoppers are provided at the front part of the loader chassis so as to face each hook. In the play mode, the traverse chassis is moved up to a horizontal position by turning it up. The disc on the tray is lifted up, and the disc is rotated at high speed by the turntable and recorded on the disc. Read the broadcast in the optical pick-up, when the tray is open,
Move the disk from the turntable to the tray by lowering the traverse chassis to make it tilt, and forward drive the tray through the tray rack that meshes with the drive pinion by rotating the drive pinion for a predetermined time under timer control. In the disk device in which each tray hook is brought into contact with each stopper to stop the tray at the most advanced position, an annular groove concentric with the support shaft is formed on the front end plate of the loader chassis. A spring that urges the drive pinion upward by fitting a gap between the drive pinion and the front end plate of the loader chassis so that the drive pinion can be raised and lowered within a certain range. The lower end of the drive pinion and the tray rack are interspersed in a helical shape. The inclination angle of the tooth portion is set to 35 ° to 55 ° (preferably 40 ° to 50 °), and the drive pinion is rotated forward so that each hook of the tray is brought into contact with each stopper. The disk device is characterized in that the drive pinion is lowered while rotating forward along the tooth portion of the tray rack and the spring is compressed in a state where is stopped at the most advanced position. A disk mounting tray is disposed on the loader chassis so as to be able to move forward and backward, and a drive pinion is externally fitted on a support shaft erected on the front end plate of the loader chassis so as to be able to rotate forward and backward. A tray rack integrally protruding along the drive pinion is formed so as to be able to mesh with the drive pinion, and a traverse chassis on which a turntable and an optical pickup are mounted is arranged in the loader chassis so as to be movable up and down. A hook is integrally projected, and a pair of stoppers are provided at the front part of the loader chassis so as to face each hook. In the play mode, the traverse chassis is moved up to a horizontal position by turning it up. The disc on the tray is lifted up, and the disc is rotated at high speed by the turntable and recorded on the disc. Read the broadcast in the optical pick-up, when the tray is open,
Move the disk from the turntable to the tray by lowering the traverse chassis to the inclined position, and forwardly drive the tray through the tray rack that meshes with the drive pinion by rotating the drive pinion for a predetermined time under timer control. And forming a gap between the drive pinion and the front end plate of the loader chassis in the disk device in which the tray is stopped at the most advanced position by bringing the hooks of the tray into contact with the stoppers. The drive pinion is externally fitted to the support shaft so as to be able to move up and down within a certain range, a spring for biasing the drive pinion upward is interposed in the gap, and the teeth of the drive pinion and the tray rack are in a helical shape. The drive pinion is rotated forward so that the hooks of the tray are brought into contact with the stoppers to bring the tray into the most advanced position. In a state of stopping the disk device, characterized in that the drive pinion is lowered while forward along the teeth of the tray rack compressing the spring. The inclination angle of the teeth of the drive pinion and tray rack is 35 ° to 55 ° (preferably 4
3. The disk device according to claim 2, wherein the disk device is set to 0 ° to 50 °. 4. A front end plate of the loader chassis is formed with an annular groove concentric with the support shaft and having the same diameter as the spring, and the lower end of the spring is fitted into the annular groove.
The disk device described in 1.

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