JPH0652013U - Feed mechanism of disc player - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose of the present invention is to easily and inexpensively attach a feed mechanism of a disc reproducing apparatus. [Structure] The plate-like member 12 is provided with a protrusion 13 having the same lead angle as the teeth formed on the worm shaft 10, and the base of the plate-like member 12 is attached to the optical pickup unit 5 with a set screw 1
The worm shaft 10 is engaged with the teeth of the worm shaft 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a feed mechanism of a disc reproducing device.

[0002]

[Prior art]

 FIG. 4 is a sectional view of a main part of a feed mechanism of a conventional disc reproducing apparatus, and FIG. 5 is an exploded perspective view of a feed mechanism of a conventional disc reproducing apparatus. The optical pickup unit 5 is slidably supported by guide rails 7 and 8, and a backup leaf spring 14 and a resin spring 15 with a rack are fastened together with a set screw 11 to the upper surface of one end of the optical pickup unit 5. is there. The rack 16 integrally formed on the lower surface of the tip of the resin spring 15 is engaged with the teeth of the worm shaft 10 and the worm shaft 10 is rotated forward and backward by the feed motor 9 to move the optical pickup unit 5 forward and backward through the rack 16. It is configured to do.

[0003]

[Problems to be solved by the device]

 In the conventional configuration as described above, there is a step of manufacturing the resin spring 15 with the rack by resin integral molding and fixing the resin spring 15 with the rack and the backup plate ridge 14 to the optical pickup unit 5 together with the set screw 11. Was needed. The present invention simplifies the configuration, reduces the cost, and simplifies the mounting process.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a feed mechanism of a disc reproducing apparatus that moves an optical pickup unit by a worm shaft that is rotated by a feed motor, and a lead angle of a tooth formed on the worm shaft on a plate member. The same protruding portion is provided, the base portion of the plate member is fixed to the optical pickup unit, and the protruding portion of the plate member engages with the teeth of the worm shaft.

[0005]

The protrusion provided on the plate-shaped member meshes with the teeth of the worm shaft, and the feed motor rotates the worm shaft forward and backward to move the optical pickup unit forward and backward through the plate-shaped member.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those in the above-described conventional example or components corresponding to those in the conventional example are denoted by the same reference numerals. 1 is a plan view of a disc reproducing apparatus according to the present invention, FIG. 2 is a sectional view of a main part taken along the line AB of FIG. 1, and FIG. 3 is a perspective view of a plate member according to the present invention.

In FIG. 1, a disc reproducing apparatus 1 supports a disc 3 in the center of a housing 2 and arranges a turntable 4 for rotation, and an optical pickup unit 5 is arranged beside the turntable 4 in a direction of an arrow 6. It is movably arranged. Reference numerals 7 and 8 are guide rails, 9 is a feed motor, and 10 is a worm shaft.

In FIG. 2, a plate-shaped member is fixed with a setscrew 11 on one end upper surface of an optical pickup unit 5 (a sectional view, but the internal structure is omitted) supported by the left and right guide rails 7 and 8. Twelve bases are fixed. In FIG. 3, the plate-like member 12 is provided with a protruding portion 13 having the same lead angle as the lead angle of the teeth formed on the worm shaft 10 below.

Next, the operation of the feed mechanism of the disc reproducing apparatus having the above configuration will be described. When the worm shaft 10 rotates, the teeth of the worm shaft 10 mesh with the protrusions 13 provided on the plate member 12, the plate member 12 is moved in parallel with the worm shaft 10, and the plate member 12 is set screw. The optical pickup unit 5 screwed by 11 moves while being guided by the guide rails 7 and 8.

The teeth of the worm shaft 10 and the protrusions 13 provided on the plate-shaped member 12 are pushed in directions away from each other according to the transmission torque. Therefore, in order to maintain proper torque transmission, when the plate-shaped member 12 is pushed, the plate-shaped member 12 is elastically deformed so that the teeth and the protruding portions 13 do not engage with each other and the rigidity does not rotate. Are required for the plate member 12. Conversely, if the material has such rigidity, the material is not selected. Further, in order to maintain proper torque transmission, the plate member 12 is biased to the worm shaft 10, for example, the plate member 12 is screwed to the optical pickup unit 5 at a height higher than that of the worm shaft 10. The configuration may be slightly lower than that.

As described above, the present invention has a structure in which the plate member 12 is simply fixed to the optical pickup unit 5 with the setscrew 11. Therefore, the number of parts is small, the cost can be reduced, and the mounting work is also possible. It will be extremely easy. It is also effective for making the device thinner.

In this embodiment, the plate-like member 12 is provided with only one protrusion 13, but a plurality of protrusions may be provided at the same intervals as the teeth of the worm shaft. Further, the plate member 12 is screwed to the upper surface of one end of the optical pickup unit 5 so that the protruding portion 13 is engaged with the teeth of the worm shaft 10 from above, but may be engaged from below. . Further, the plate member 12 may be screwed to the lower surface of one end of the optical pickup unit 5, and in this case as well, the protruding portions may be engaged with the teeth of the worm shaft 10 from both the upper and lower sides.

[0013]

[Effect of device]

 As described above, since the feed mechanism of the disc reproducing apparatus according to the present invention is composed of a single part, it is not necessary to manufacture a plurality of parts as in the conventional case. Moreover, the number of mounting steps can be reduced, and the manufacturing can be performed at low cost and easily. It is also effective for making the device thinner.

[Brief description of drawings]

FIG. 1 is a plan view of a disc reproducing apparatus according to the present invention.

FIG. 2 is a cross-sectional view of essential parts taken along the line AB of FIG.

FIG. 3 is a perspective view of a plate member according to the present invention.

FIG. 4 is a cross-sectional view of a main part of a feed mechanism of a conventional disc reproducing device.

FIG. 5 is an exploded perspective view of a feed mechanism of a conventional disc reproducing apparatus.

[Explanation of symbols]

1 ... Disk reproducing device, 5 ... Optical pickup unit,
Reference numerals 7, 8 ... Guide rails, 9 ... Feed motors, 10 ... Worm shafts, 11 ... Set screws, 12 ... Plate members, 13 ... Projection portions.

Claims (1)

[Scope of utility model registration request] 1. In a feed mechanism of a disc reproducing apparatus in which an optical pickup unit is moved by a worm shaft rotated by a feed motor, a protruding portion having a toothed lead angle formed on the plate-shaped member is formed on the worm shaft. A feed mechanism of a disc reproducing apparatus, wherein a base portion of the plate-shaped member is fixed to the optical pickup unit, and a protruding portion of the plate-shaped member is meshed with teeth of the worm shaft.