JP3089167U - Pickup moving device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To increase the number of parts for releasing a clamp mechanism while stopping a pickup at its stop position by utilizing an auxiliary rack attached to a feed rack for preventing backlash. Without having to work together. SOLUTION: A feed rack 1 and an auxiliary rack 5 are elastically urged by coil springs in opposite directions. When the pickup 3 reaches the stop position S, the teeth of the feed rack 1 meshing with the pinion 4 are deleted, while the teeth 52 of the auxiliary rack 5 are extended, so that the feed is extended at the teeth extension 52 '. Compensate for the missing part of the meshing teeth of the rack 1. Due to the rotation of the pinion 4 meshing with the dentition extension 52 ′, only the auxiliary rack 5 moves with respect to the feed rack 1 in the moving direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a pickup moving device, and more particularly, to a pickup moving device having a rack and pinion mechanism as a feed mechanism for moving an optical pickup (optical pickup) in a radial direction of a disk.

[0002]

[Prior art]

 In a disk device employing this type of pickup moving device, the pickup moves in the radial direction of the disk that is rotated by being clamped by the clamp mechanism. Then, prior to the removal of the disk, the pickup moves to the stop position on the inner peripheral side of the disk and stops.After that, the disk whose disk is not clamped by the clamp mechanism is moved to the tray and discharged out of the device by the tray. You. In such a disk device, the releasing operation of the clamp mechanism performed after the pickup moves to the stop position on the inner peripheral side of the disk and stops is linked with the operation of moving the pickup to the stop position. Is being done.

Conventionally, as a linking means for performing a releasing operation of a clamp mechanism after a pickup is stopped at a stop position, the pickup is moved by a fixed stroke (a fixed width) beyond the stop position. Thus, there has been known an arrangement in which a stroke motion for a fixed motion linkage is given to a base provided with the pickup, and the clamp mechanism is released using the stroke motion. (Conventional example).

Japanese Unexamined Patent Application Publication No. 9-320216 discloses that the tip of the tooth end on the rack side of a pinion rack mechanism for moving the pickup is formed in a tapered shape so that the pickup is inverted from its stop position. There is a description of a means for smoothly engaging the pinion and the rack when moving in the direction.

[0005]

[Problems to be solved by the invention]

 However, in a conventional example in which a base provided with a pickup is provided with a stroke motion for a fixed operation linkage to release the clamp mechanism, the base is provided adjacent to a stop position of the pickup. Further, since it is necessary to secure a certain space for allowing the stroke movement of the pickup itself, an extra space is required and it is difficult to reduce the size of the disk device. In other words, in a small disk drive having a high component mounting density in which other components, for example, components such as a motor for loading and unloading the tray, are incorporated in the space adjacent to the stop position of the pickup, the pickup stops. It is impossible to secure a certain space adjacent to the position, which further allows the stroke movement of the pickup itself. Therefore, in such a disk drive, a measure is taken to release the clamp mechanism by applying a stroke motion for a constant operation linkage to a base provided with a pickup as in the conventional example. Can not take.

In a pickup moving device, a base provided with a pickup includes a feed rack for moving the pickup to a stop position by rotation of a pinion. The teeth of the pinion are resiliently pinched by the teeth of the auxiliary rack which are elastically urged in the direction of the teeth and the teeth of the feed rack. This is to prevent so-called backlash from occurring in the feed rack or the base to which the feed force is applied by the pinion, thereby preventing the feed operation from becoming unstable.

The present invention has been made in view of the above situation, and focuses on the fact that a feed rack is provided with an auxiliary rack for preventing backlash, and by utilizing the auxiliary rack, a pickup is provided. An object of the present invention is to provide a pickup moving device that can perform a releasing operation of a clamp mechanism in an interlocked manner without increasing the number of parts while stopping at a stop position after stopping at a regular stop position. And

[0008] Further, the present invention provides that, after the pickup stops at the regular stop position, the pick-up is stopped at the stop position, and the necessary operation other than the release operation of the clamp mechanism is performed without increasing the number of parts. The purpose is to provide a pickup moving device that can be linked and operated.

[0009]

[Means for Solving the Problems]

 In the pickup moving device according to the present invention, the base provided with the pickup is provided with a feed rack for moving the pickup to its stop position by rotation of the pinion, and is superposed on the feed rack so as to be relatively slidable in the toothing direction. The teeth of the pinion are resiliently held between the meshing teeth of the auxiliary rack and the meshing teeth of the feed rack which are elastically urged in the direction in which the teeth are arranged. Therefore, it is possible to prevent so-called backlash from occurring in the feed rack or the base to which the feed force is applied by the pinion and to make the feed operation unstable, and the pickup can be moved smoothly and stably.

In the present invention, a coil spring is interposed between spring receiving portions provided on the feed rack and the auxiliary rack, respectively, and the coil spring allows the pickup to move from the non-stop position to the stop position. The auxiliary rack is elastically urged in the moving direction, and the feed rack is elastically urged in a direction opposite to the auxiliary rack. When the pickup reaches the stop position, the feed rack engages with the pinion. While the meshing teeth are missing, the teeth of the auxiliary rack are extended to make up for the missing portions of the teeth of the feed rack with the teeth extending, and the teeth are extended to the teeth. The rotation of the meshed pinion causes the auxiliary rack to move in the movement direction with respect to the feed rack. At the end of the auxiliary rack, there is provided a connecting tooth row that performs a linking operation with a clamp mechanism that rotatably clamps the disk by moving the auxiliary rack.

[0011] With this configuration, until the base moves together with the feed rack due to the rotation of the pinion and the pickup reaches the stop position, the teeth of the pinion are engaged with the teeth of the feed rack. When the stop position is reached, the teeth of the pinion reach the teeth of the feed rack where the meshing teeth are missing and separate from the teeth of the feed rack. Therefore, even if the pinion rotates, the feed rack does not move, and the pickup remains stopped at the stop position. On the other hand, the teeth of the pinion that have reached the meshing teeth-missing portion of the feed rack are meshing with the extended portion of the dentition of the auxiliary rack, so that as the pinion continues to rotate, only the auxiliary rack moves relative to the feed rack. The auxiliary rack is moved, thereby applying a stroke to the auxiliary rack, and the stroke of the auxiliary rack can be used to operate the clamp mechanism. The operation of the clamp mechanism at this time includes an operation of releasing the clamp of the disk.

In the pickup moving device according to the present invention, the base provided with the pickup includes a feed rack for moving the pickup to a stop position by rotation of a pinion, and the feed rack is slidable relative to the tooth arrangement direction. In the pickup device, the teeth of the pinion are resiliently clamped by the meshing teeth of the auxiliary rack and the meshing teeth of the feed rack, which are superimposed and elastically urged in the direction in which the teeth are arranged. When the gear reaches the stop position, the teeth of the feed rack that mesh with the pinion are removed, while the teeth of the auxiliary rack are extended to extend the teeth of the auxiliary rack. In addition to supplementing the missing parts of the teeth, the rotation of the pinion meshed with the extended part of the dentition causes The auxiliary rack may be configured to move in the tooth arrangement direction with respect to the feed rack to perform an interlocking operation with a predetermined operating mechanism.

[0013] A coil spring is interposed between spring receiving portions provided on the feed rack and the auxiliary rack, respectively. The coil spring allows the pickup to move in a moving direction from the non-stop position to the stop position. The auxiliary rack may be elastically urged, and the feed rack may be elastically urged in a direction opposite to the auxiliary rack.

[0014]

[Embodiment of the invention]

 FIG. 1 is a schematic plan view of the pickup moving device according to the embodiment of the present invention, and FIG. 2 is a schematic view of the feed rack 1 and the auxiliary rack 5 as viewed from the direction of the arrow II in FIG. .

1 and 2, reference numeral 1 denotes a feed rack. The feed rack 1 is provided with a base 2 integrally therewith, and a pickup 3 is mounted on the base 2. L1 indicates the length of the tooth row 12 of the feed rack 1. The teeth 12 of the feed rack 1 are meshed with the teeth of a pinion 4 driven by a motor (not shown). The forward or reverse rotation of the pinion 4 causes the pickup 3 together with the feed rack 1 to move. The mounted base 2 is moved forward or backward in the direction of arrow A (radial direction of the disk) in FIG. The dashed line S in FIG. 1 indicates the stop position of the pickup 3 set on the inner peripheral side of the disc. When the disc is clamped by a clamp mechanism (not shown), the lens center R of the pickup 3 is shifted to the center. It is located at the non-stop position just before the stop position (to the left of the dashed line in the figure).

Reference numeral 5 denotes an auxiliary rack, which is superposed on the feed rack 1 so as to be relatively slidable in the direction in which the teeth are arranged (corresponding to the direction of arrow A). L2 indicates the length of the tooth row 52 of the auxiliary rack 5. As shown in FIG. 2, each of the feed rack 1 and the auxiliary rack 5 has openings 13 and 53 which are long in the direction in which the teeth are arranged. The spring receiving portion 14 provided on the feed rack 1 is inserted into the opening 53 of the auxiliary rack 5, and the spring receiving portion 54 provided on the auxiliary rack 5 is inserted into the opening 13 of the feed rack 1. A coil spring 6 is interposed between the spring receiving portions 14 and 54 of the auxiliary rack 5 in the moving direction (forward direction) A1 of the pickup 3 from the non-stop position to the stop position. , And the feed rack 1 is elastically urged in a direction opposite to the auxiliary rack (return direction A2 of the pickup 3). In the illustrated example, the guide rack 15 provided on the feed rack 1 is slidably engaged with the guide hole 55 provided on the auxiliary rack 5 so that the auxiliary rack 5 slides on the feed rack 1. It is freely connected. Further, a protruding portion 56 is provided at one end of the auxiliary rack 5, and a short tooth row 57 is provided on the protruding portion 56.

FIG. 3 is an explanatory view showing a state in which the pinion 4 is engaged with the feed rack 1 and the auxiliary rack 5. As shown in the figure, when the pinion 4 is engaged with the feed rack 1 and the auxiliary rack 5, the teeth 41 of the pinion 4 engage with the feed rack 1, which is elastically urged in the opposite direction by the coil spring 6. It is sandwiched between the teeth 12 a and the meshing teeth 52 a of the auxiliary rack 5. Therefore, the rotation of the pinion 4 is transmitted to the feed rack 1 accurately, and so-called backlash does not occur.

By the way, as described at the beginning, in the conventional example, after the pickup stops at the stop position, the pickup is moved by a fixed stroke (constant width) beyond the stop position, so that the pickup is moved. A stroke motion for a certain motion linkage is given to the provided base, and the stroke motion is used to release the clamp mechanism. Therefore, when the pickup reaches the stop position, the pinion meshes with the teeth of the feed rack integrated with the base on which the pickup is mounted.

On the other hand, in the illustrated embodiment, when the pickup 3 reaches the stop position S, the meshing teeth 12a of the feed rack 1 that meshes with the pinion 4 are omitted. On the other hand, the row of teeth 52 of the auxiliary rack 5 is extended by a fixed length in the returning direction A2 of the pickup 3, and the length of the row of teeth 52 ′ (the length of the row of teeth 52 ′ in FIG. L2 ') to compensate for the lack of meshing teeth of the feed rack 1 and the auxiliary rack 5 is picked up with respect to the feed rack 1 by the rotation of the pinion 4 meshed with the tooth row extension 52'. 3 in the forward direction A1.

FIG. 4 is an explanatory view showing the meshing relationship between the pinion 4 and the feed rack 1 and the auxiliary rack 5 when the pickup reaches the stop position S. FIG. FIG. 6 is an explanatory view showing the meshing relationship between the pinion 4 and the feed rack 1 and the auxiliary rack 5. In FIGS. The position of engagement with the portion 52 'is shown.

The meshing teeth 12a of the feed rack 1 mesh with the teeth 41 of the pinion 4 until the pickup 3 reaches just before the stop position S, but immediately before the pickup 3 reaches the stop position S as shown in FIG. Then, the tooth row 12 (mesh teeth 12a) of the feed rack 1 separates from the pinion 4, and only the tooth row extension portion 52 '(mesh teeth 52a) of the auxiliary rack 5 meshes with the pinion 4. The rotation of the pinion 4 causes the auxiliary rack 5 to move in the forward movement direction A1 with respect to the feed rack 1 as shown in FIG. The stroke of the auxiliary rack 5 at this time is indicated by reference numeral W in FIG. Due to the movement (stroke movement) of the auxiliary rack 5 in the range of the stroke W at this time, the tooth row 57 moves together with the protruding piece portion 56 (see FIG. 1) at one end of the auxiliary rack 5, and the movement is performed. A clamping mechanism (not shown) works together to release the disc clamp.

In this embodiment, the auxiliary rack 5 performs a stroke motion by the rotation of the pinion 4 meshed with the tooth row extending portion 52 ′ of the auxiliary rack 5 to perform the linking operation with the clamp mechanism. The point may perform a link operation with another operation mechanism, for example, a mechanism for loading and unloading the disk tray.

[0023]

[Effect of the invention]

 As described above, according to the pickup moving device of the present invention, by utilizing the auxiliary rack for preventing the backlash of the feed rack, after the pickup stops at the regular stop position, the pickup is moved to the stop position. While stopping, only the auxiliary rack is moved to link the clamp mechanism and other predetermined operating mechanisms, so that the stroke movement of the pickup itself is allowed adjacent to the stop position of the pickup. Even when it is not possible to secure a certain space, it is possible to link and operate the operating mechanisms such as the clamp mechanism without increasing the number of parts.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a pickup moving device according to an embodiment of the present invention.

FIG. 2 is a view schematically showing a feed rack and an auxiliary rack as viewed from the direction of the arrow II in FIG. 1;

FIG. 3 is an explanatory diagram showing a meshing state between a pinion, a feed rack, and an auxiliary rack.

FIG. 4 is an explanatory diagram showing a meshing relationship between a pinion, a feed rack, and an auxiliary rack when a pickup reaches a stop position.

FIG. 5 is an explanatory diagram showing a meshing relationship between a pinion, a feed rack, and an auxiliary rack after the pickup reaches a stop position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Feed rack 2 Base 3 Pickup 4 Pinion 5 Auxiliary rack 6 Coil spring 12a Meshing teeth of feed rack 14,54 Spring receiving part 41 Teeth of pinion 52 'Teeth extending part 52a Meshing teeth of auxiliary rack 57 Teeth row (connection Tooth row) S Stop position

Claims (4)

[Utility model registration claims] A base provided with a pickup includes a feed rack for moving the pickup to a stop position by rotation of a pinion, and is superimposed on the feed rack so as to be relatively slidable in the direction in which the teeth are arranged. In a pickup device in which the teeth of the pinion are resiliently pinched by the meshing teeth of the urged auxiliary rack and the meshing teeth of the feed rack, the pickup device is provided on each of the feed rack and the auxiliary rack. A coil spring is interposed between the provided spring receiving portions. The coil spring urges the auxiliary rack in the moving direction of the pickup from the non-stop position to the stop position, and the feed rack is When the pickup reaches the stop position when it is urged in the opposite direction to the auxiliary rack While removing the meshing teeth of the feed rack that meshes with the pinion, the teeth of the auxiliary rack are extended to compensate for the missing portion of the meshing teeth of the feed rack at the tooth row extending portion, The auxiliary rack is moved in the moving direction with respect to the feed rack by the rotation of the pinion meshed with the tooth row extending portion, and the disk is rotatably clamped by the movement of the auxiliary rack at this time. A pickup moving device, wherein a connecting tooth row for performing a linking operation with a mechanism is provided at an end of the auxiliary rack. 2. A base provided with a pickup includes a feed rack which moves the pickup to a stop position by rotation of a pinion, and is superimposed on the feed rack so as to be relatively slidable in the direction in which the teeth are arranged. In a pickup device in which the teeth of the pinion are resiliently clamped by the meshing teeth of the biased auxiliary rack and the meshing teeth of the feed rack, the pinion is moved when the pickup reaches a stop position. While the meshing teeth of the feed rack that mesh with the feed rack are missing, the tooth rows of the auxiliary rack are extended to compensate for the lacking portions of the meshing teeth of the feed rack at the tooth row extending portion, and the teeth thereof are The rotation of the pinion engaged with the row extension raises the auxiliary rack with respect to the feed rack. Go to alignment of teeth direction pickup moving apparatus characterized by being adapted to perform cooperative operation with the predetermined operating mechanism. 3. A coil spring is interposed between spring receiving portions provided on each of the feed rack and the auxiliary rack, and the coil spring causes the pickup to move in a moving direction from a non-stop position to a stop position. 3. The auxiliary rack is elastically urged, and the feed rack is elastically urged in a direction opposite to the auxiliary rack.
Pickup moving device described in 1. 4. The apparatus according to claim 2, wherein the operating mechanism is a clamp mechanism for rotatably clamping the disk.
Pickup moving device described in 1.