JPH0229587Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to an optical pick-up fixing device, which does not particularly affect the movement of the pick-up during performance, and which does not affect the pick-up during transportation. This invention relates to a pick-up fixing device that can securely fix the pick-up.

(b) Conventional technology A DAD that performs playback by irradiating a laser beam onto the unevenness of a disk that corresponds to a digital signal.
(digital audio disc) players are known. In this DAD player, playback is performed by moving the pick-up in the radial direction relative to the disk, so the pick-up must be moved in parallel. There are various methods for moving the pickup in parallel. One example is a method in which the pickup is fixed to a rectangular parallelepiped pickup base and both ends of the pickup base are driven by feed screws. However, in such a method, the parallelism of the rotating shaft must be strictly set, and if the parallelism is impaired, the pickup cannot be moved. Therefore, the applicant drives only one end of the pick-up base,
He proposed a pickup drive system in which the other end runs along the chassis, and filed an application earlier. Although such a pick-up drive device has no problem in moving the pick-up in parallel, it is susceptible to vibration because only one end is in contact with the chassis, and the pick-up may come off during transportation or drop tests. , there was a risk of damage.

(c) Purpose of the invention The present invention has been made in view of the above-mentioned points, and aims to provide a pick-up fixing device that is effective for use in one-sided drive pick-ups.

(d) Structure of the invention The pick-up fixing device according to the invention includes a plate spring fixed to the pick-up base, a receiving member fixed to the chassis and having a screw hole inside, and one end inserted into the screw hole of the receiving member. The fixing member has a threaded portion to be screwed together, and a fixing member having an end portion inserted into the chassis at the other end, and clamping and fixing the leaf spring together with the receiving member.

(E) Embodiment Figure 1 shows an embodiment of the present invention.
3 is an optical pick-up having a projection part 2; 3 is a pick-up base to which the pick-up 1 is fixed; 4 is a bearing member fixed to one end of the pick-up base 3 and has a screw hole therein; 5 is the bearing member 4. 7 is a gear fixed to one end of the feed screw 5; 8 is a gear 1 that engages with the gear 7 on a rotating shaft 9;
0 is a fixed drive motor; 11 is a roller rotatably connected to the pick-up base 3 and rotates along the upper chassis 12; 13 is a leaf spring whose one end is fixed to the pick-up base 3;
4 is a receiving member that is fixed to the upper chassis 12 and partially has a screw hole 15 therein, and 16 has a threaded part 17 screwed into the screw hole 15 of the receiving member 14 at one end and a lower part at the other end. This is a fixing member that includes a retaining member 19 that locks onto the side chassis 18.

In the non-fixed state shown in FIG. 1, the pickup 1 can move in parallel in the direction of arrow A or arrow B. When the drive motor 8 is operated,
The rotating shaft 9 and the gear 10 rotate, and the gear 10
The gear 7 that is engaged with also rotates. Therefore, the feed screw 5 rotates, the bearing member 4 screwed onto the feed screw 5 moves horizontally, and the pick-up base 3 and pick-up 1 to which the bearing member 4 is fixed also move horizontally. . A roller 11 rotatably connected to the pick-up base 3 rotates while contacting the upper chassis 12 as the pick-up base 3 moves in the horizontal direction, thereby helping the pick-up base 3 to move horizontally. Although not shown, two rollers 11 are provided so as to sandwich the upper chassis 12.

Leaf spring 13 fixed to pick-up base 3
As shown in FIG. 3, the fixing member 16 has a substantially U-shaped groove 20, and the diameter of the threaded portion 17 of the fixing member 16 is made narrower than the width of the groove 20. Therefore, even if the pick-up base 3 to which the leaf spring 13 is fixed moves in the direction of arrow A or arrow B, the leaf spring 13 and the fixing member 16 will not come into contact with each other.
The fixing member 16 does not obstruct the movement of the pickup.

When it is necessary to fix the pickup 1 during transportation, etc., the fixing member 16 may be rotated and the threaded portion 17 of the fixing member 16 may be screwed into the screw hole 15 of the receiving member 14. FIG. 2 shows a state in which the screwing has been completed, and the leaf spring 13 is clamped and fixed by the lower end of the receiving member 14 and the upper end 22 of the main body 21 of the fixing member 16, so that it can be picked up. Fixation of the base 3 and pick-up 1 is achieved. Upper end 22 of main body portion 21 of fixing member 16 and receiving member 1
The diameter of the lower end 23 of 4 is the U-shaped groove 2 of the leaf spring 13.
Since the width of the fixed member 1 is larger than the width of the fixed member 1
The leaf spring 13 can be accurately fixed by simply rotating the spring 6.

(f) Effects of the invention As described above, according to the invention, the leaf spring fixed to the pick-up base is clamped and fixed by the receiving member and the fixing member, so that the pick-up base and This has the advantage that the pick-up can be fixed elastically.
Further, since the fixation is performed using a leaf spring having elasticity, there is no need for strict alignment between the leaf spring, the receiving member, and the fixing member, and there is an advantage that manufacturing is easy. Furthermore, the fixing member is screwed onto the lower chassis, and even when the fixing member is not fixed, its tip is inserted into the part of the receiving member that does not have a screw hole, so when the fixing member is not fixed, the chassis It has the advantage that it does not need to be removed from the camera and can be prevented from being lost.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a partial sectional view showing the fixed state, and FIG. 3 is a plan view showing the shape of the leaf spring. Explanation of main drawing numbers, 1...Pickup, 3...
Pick-up base, 13... leaf spring, 14...
Receiving member, 16...Fixing member.

Claims (1)

[Scope of utility model registration request] In the apparatus for moving the pick-up fixed to the pick-up base in parallel by driving one end of the pick-up base to which the pick-up is fixed, the other end of the pick-up base runs along the chassis, and the pick-up fixed to the pick-up base is moved in parallel. A leaf spring, a receiving member fixed to the chassis on the other end of the pick-up base and having a screw hole inside, a threaded portion screwed into the screw hole of the receiving member, and a chassis on the one end of the pick-up base. and a fixing member having an end portion to be inserted, and the pick-up is fixed by clamping and fixing the leaf spring between the receiving member and the fixing member. Fixation device.