JPS5847535Y2 - Pick-up stylus holder - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stylus holder for a pickup, and is intended to make it easier to set the stylus at a predetermined position and to maintain constant pickup compliance and playback stylus pressure.

FIG. 1 shows the schematic structure of a pickup equipped with a conventional stylus holder.

In the figure, 1 is a pickup case, 2 is a cantilever, 3 is a stylus holder, 4 is a stylus, 5 is a leaf spring, and 6 is a connecting plate for transmitting a signal from a time axis corrector (not shown) to the stylus 4. It is.

The stylus holder 3 of this pickup, as shown in FIG. 4 is passed through and the two are mechanically and electrically connected with a conductive adhesive 7.

However, in this configuration, the angle θ formed by the leaf spring 5 and the stylus holder 3 is not constant depending on the accuracy during the bonding work.

When this angle θ is small θ1 as shown in FIG.

On the other hand, when the angle θ is large θ2 as shown in the opening of the same figure, the stylus 4 is supported at a position downwardly away from the predetermined position I.

With such a pickup, the stylus cannot be brought into contact with the recording medium with the appropriate stylus pressure during playback, and the compliance will also be uneven, so there is a risk of dropouts due to tracking errors or damage to the stylus or recording medium due to excessive stylus pressure. There is.

The present invention has been made with these drawbacks in mind, and it is an object of the present invention to provide a stylus holder for a pickup that can reduce variations in pickup compliance and stylus force.

That is, the present invention provides a side surface extending in a direction crossing the scanning surface of a recording medium scanned by the stylus, to which a stylus having an electrode on one side is attached, and a side surface extending in a direction intersecting the scanning surface of a recording medium scanned by the stylus, and providing a predetermined compliance to the stylus. It is an object of the present invention to provide a stylus holder for a pickup, which includes a slope having a predetermined inclination with respect to the scanning surface for attaching a leaf spring electrically connected to an electrode.

FIG. 4 shows a perspective view of essential parts of an embodiment of the present invention, in which the stylus holder 10 has vertical side surfaces 11 and 12 to which the stylus is attached to the tip thereof, and an open end portion of the plate. It is molded of synthetic resin so as to have a slope 13 to which the spring is attached, and a projection 14 which penetrates the through hole of the spring.
40 surface is subjected to metallization treatment such as resin plating (the portion is indicated by diagonal lines).

The base of this stylus holder 100 is attached to the tip of the cantilever 2, similar to the conventional pickup shown in FIG.

FIG. 5 shows the stylus and leaf spring fixed to the holder of the present invention.

The stylus 20 has an electrode 21 on one side, and the side opposite to the side having the electrode and the side adjacent thereto are attached to the sides 11 and 12 of the stylus holder to position the stylus. .

In this state, a conductive adhesive 22 is applied between the electrode 21 of the stylus and the side surfaces 11, 12, and 15 of the stylus holder.
is applied to complete the mechanical and electrical connection between the two.

The base of the leaf spring 5 is fixed to the pickup case 1 as in the conventional one, but its open end is attached to the slope 13, and the through hole 23 provided in the corresponding part is connected to the protrusion 14. The stylus holder is then mechanically and electrically connected to the bevel 13 of the stylus holder by means of a conductive adhesive 24.

With this configuration, the angle α of the leaf spring 5 with respect to the stylus holder 10, in other words, the angle with respect to the scanning surface of the recording medium scanned by the stylus is defined to a constant value by the slope 13, and the curvature of the leaf spring 50 is also defined to a constant value. .

Therefore, the relationship exerted by the leaf spring on the stylus 20 can be made substantially constant, and the above-mentioned drawbacks can be eliminated.

Further, since the signal from the electrode 21 of the stylus is transmitted to the leaf spring 5 through the conductive adhesive 22, the side surface 11.12° 15 of the stylus holder, the slope 13, and the conductive adhesive 24, the stylus 20 The vertical length of the stylus can be significantly reduced compared to conventional ones (for example, from about 3 [μm] in the conventional case to 500 to 700 [μm]), and the manufacturing cost of the stylus, which is generally molded from diamond, can be reduced. It also has the effect of being very cheap.

Note that the present invention is not limited to the configuration shown in the embodiments, and may be modified in various ways, for example, by providing a through hole in the stylus holder and allowing the stylus to run along the wall of the through hole.

It goes without saying that when the axial direction of the stylus is not perpendicular to the scanning plane but has a certain angle, the inner wall surface of the through hole is formed along this axial direction.

In any case, in the present invention, the plate-shaped fly lead is made to follow the slope having a predetermined angle with respect to the scanning plane, so that the compliance of the pickup and the variation in stylus force can be reduced. It is.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a conventional pickup, FIG. 2 is a diagram of a conventional stylus holder, and FIG. 3 is an explanatory diagram of its operation. Figure 4 is a perspective view of the main parts of the cage of the present invention, Figure 5 A2
Figure 1 shows the configuration of the main parts of a pickup to which this is applied; Figure A is a side view, and Figure 2 is a front view. Explanation of main drawing numbers, 11.12...Stylus attachment side, 13...Slope, 20...Stylus, 5...Leaf spring, 23...Through hole, 22, 24... conductive adhesive.

Claims (1)

[Claims for Utility Model Registration] 1. A side surface extending in a direction intersecting the scanning surface of a recording medium scanned by the stylus, to which a stylus having an electrode on one side is attached; a stylus holder for a pickup, the stylus holder having a predetermined inclination with respect to the scanning surface for attaching a leaf spring electrically connected to the electrode. 2. The stylus holder for a pickup according to claim 1, wherein the slope is provided with a protrusion that can penetrate a through hole provided in the leaf spring. 3. The stylus holder for a pickup according to claim 2, wherein the holder is made of an insulating member, and the side surface and the slope are subjected to metallization treatment for electrical connection.