Optical pickup feeding device and optical pickup supporting device including the same

Abstract

The present invention relates to an optical pickup feeding device and an optical pickup supporting system including the same. The optical pickup feeding device can movably support the optical pickup device, so as to solve the following problems: a rack on which the optical pickup device is supported, offsets along the vertical direction of an axle for feeding and a groove of the axle for feeding is disengaged with a tooth portion of the rack, thus the torsional flexibility different from the design intention is generated in thin-wall portion of the rack, the rack is damaged and the optical pickup device can not stably advance. A plurality of limit portions protruding from the tooth portion are arranged at the position on which the axle for feeding is clamped on the upper, lower positions adjacent to the tooth portion of the rack. The limit portion comprises an inclined surface separated from an arm portion along the surface of the perimeter of the axle for feeding to furthermore be separated from the axle for feeding. When the tooth portion is separated from the groove of the axle for feeding, the torsional flexibility is prevented from being generated on the thin wall portion of the rack. In addition, the rack is prevented from being separated from the axle for feeding to a large extend.

Description

technical field [0001] The present invention relates to an optical pickup feeding device and an optical pickup supporting device having the same, in particular to an optical pickup feeding device capable of realizing cheap and stable feeding of the optical pickup and an optical pickup having the same. Pickup support device. Background technique [0002] The optical pickup supporting device (so-called guide device) moves the optical pickup in the radial direction of the optical disc to record and read data from the optical disc. In the case of detecting the position of the optical pickup (any one of the innermost circumference or the outermost circumference of the optical disc), in the past, a position detection switch was provided on the fixed substrate (chassis) of the optical pickup support device, and the optical pickup Contact the position detection switch on the innermost or outermost circumference to detect the position. [0003] However, in this case, it is necessar...

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Problems solved by technology

However, if the engaging portion 63 such as Figure 8 If it rises obliquely upward (in the YZ direction) as indicated by the middle arrow, the thin-walled portion 64T of the arm portion 64 will be in a twisted state, and a torsional deformation different from the design intention will occur.

[0015] Regarding the number of times that the tooth portion 62 jumps over the feeding groove 73 (the thin portion 64T is twisted and deformed) during the detection of one torque change, even if it is only 2 to 3 times, for example, if the optical pickup 55 moves to If the inner peripheral end or the outer peripheral end is repeated thousands of times or tens of thousands of times, there will also be durability problems such as damage to the rack 60, especially the thin-walled portion 64T.

[0016] In addition, in the drop test, the meshing of the tooth portion 62 and the feed groove 73 may be disengaged.

In this case, for example, if the deflection setting of the thin portion 64T is inappropriate, it may be difficult to return from the state where the tooth portion 62 is placed on the peripheral surface 72S of the lead screw 72 without the feed groove 73 . Even when the tooth portion 62 and the feed groove 73 are meshed, there is a problem that power cannot be transmitted stably.

[0017] And, even in the traveling process of optical pick-up 55, in the situation that causes the required torque of stepper motor 71 to become large by some reason (for example, the lubricant that is coated on the main guide shaft 53 is insufficient by long-term use) , when the moving load of the optical pickup 55 increases, etc.) problems will also arise

That is, since the moving load of the optical pickup 55 increases, it becomes the same state as that in which the torque required by the stepping motor 71 becomes larger in the process of detecting the position of the inner peripheral end or the outer peripheral end, so the meshing deviates to the tooth portion 62 and the feeding groove 73 do not disengage, resulting in the inability to stably transmit power

In addition, if the meshing and disengagement of the tooth portion 62 and the feed groove 73 occur similarly to the position detection, there is also a problem that the burden on the thin portion 64T of the rack 60 increases accordingly.

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