JPS60220414A - Controller of combined flat plate - Google Patents

Abstract

PURPOSE:To control accurately the relative positions between two combined flat plates by drilling a triangular hole to one of both plates together with a W- shaped hole drilled to the other plate respectively. CONSTITUTION:A W-shaped control hole 19 is drilled to a position detecting plate 9; while a triangular control hole 20 is drilled to an attachment plate 8 respectively. Both plates 9 and 8 are combined together to obtain three grooves 22-24 into which a control driver is put with an apex 21 of the hole 20 of the plate 8 defined as a fulcrum.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an adjustment device for a combination flat plate, and is used, for example, as a function of a record player, to adjust the pickup arm device to adjust the tone groove on the innermost circumference of a record immediately after playing the record. This can be applied to an adjustment device for the position detection plate installed to detect the position of the cartridge attached to the pickup in order to automatically lift it from the top of the disc or automatically stop the rotation of the turntable. .

Conventional Structure and Problems Conventionally, as shown in FIG. A pickup arm device 4 for tracing the groove is arranged, and a cartridge 5 is attached to the tip of the pickup arm device 4. After the cartridge 5 traces the innermost sound groove 6 of the record 2, in the process of tracing the lead-out groove 7 of the record 2, the rotation angle position of the cartridge 5, that is, the pickup device 4 is detected, and the cartridge 5 is The attached record needle is automatically pulled up from the record disk 2, and the rotating turntable 3 is stopped.

As this method, as shown in FIG. 2, conventionally, the LED lo
The phototransistor 11 converts the amount of light emitted from the record stylus into an electric signal (hereinafter referred to as an end detection mechanism), and processes the signal to automatically raise the record needle from the record 2. Control is performed to stop the turntable 3 that is moving or rotating. In order for this function to operate normally, when the cartridge 5 comes to the position of the lead-out groove 7 of the record 2, the position detection plate 9 is placed in a position where the amount of light emitted from the LED lo is changed and transmitted to the phototransistor 11. It is necessary that there be.

However, since there are variations in the finished dimensional accuracy of each component constituting the above-mentioned termination detection mechanism, in reality, the relative positions of the position detection plate 9, LED lo, and phototransistor 11 can be corrected as shown in Fig. 3. It is structured as follows.

In FIG. 3, a position detection plate 9 is attached to a shaft 12 so as to be movable about a shaft 12 which is the rotational center point of the mounting plate 8 which rotates together with the pickup device 4. In order to correctly correct the position detection plate 9 to the relative position of the cartridge 5, an adjustment hole 13 is provided. This adjustment hole is a triangular hole 1 provided in the mounting plate 8 as shown in FIG.
4 and a triangular hole 16 provided on the position detection plate 9, the orientation of which is opposite to that of the triangular hole 14 of the mounting plate 8. The position detection plate 9 can be moved using the triangular hole 140 of the mounting plate 8.
It is movable by using the vertex 16 as a fulcrum and closing the side 17 or 18 of the triangular hole 15 of the position detection plate 9.

However, since such an adjustment mechanism is performed with the tip of a flathead screwdriver, the movable range of the position detection plate 9 is restricted by the thickness of the tip of the flathead screwdriver, and the relative position of the IJ screwdriver 5 cannot be detected correctly. There was a drawback that the plate 9 could not be corrected.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned conventional drawbacks and provides a combination flat plate adjusting device having a structure that allows the position detection plate to be adjusted correctly to the relative positional relationship of the cartridges.

Structure of the Invention In order to achieve the above object, the present invention provides a triangular hole in one plate and a hole in the shape of the letter W facing in the opposite direction to the triangular hole in the other plate. It consists of a position detection plate that can be held. According to such a configuration,
When moving the position detection plate using the apex of the triangular hole in one plate as a fulcrum, the number of grooves into which the adjustment screwdriver can be inserted increases to three, increasing the movable range of the position detection plate.
As a result, the relative position of the two plates can be correctly corrected, which has the advantage of allowing the end detection function of the record player to operate normally.

DESCRIPTION OF EMBODIMENTS FIGS. 5 to 8 show an embodiment of the present invention.
FIG. 5 shows the position detection plate 9, which is provided with an adjustment hole 19 shaped like the letter W.

Further, FIG. 6 shows a mounting plate 8 in which a triangular adjustment hole 20 is provided. FIG. 7 shows a state in which the above-mentioned position detection plate 9 and mounting plate 8 are combined. When assembled as shown in FIG. 7, there are three insertion grooves 22, 23, and 24 for the adjustment screwdriver with the apex 21 of the adjustment hole 20 of the mounting plate 8 as the fulcrum.

The record grayer having the end detection mechanism configured in this way has a turntable 3 on which the record 2 is mounted on the top surface of the main body, and a pickup arm that traces the sound groove of the record 2, as shown in No. 8. device 4, and a cartridge 6 at the tip of the pickup arm device 4.
is installed. In the process of tracing the lead-out groove 7 of the record disc 2, the position of the cartridge 5, that is, the initial mounting position of the position detection plate 9, which changes as the rotation angle of the pickup arm device 4 changes, changes to the position of the cartridge 5. If they do not relatively match, the position of the position detection plate 9 can be corrected to the correct relative position of the cartridge 6 by the adjustment function of the end detection mechanism described above.

When correcting the position of the position detection plate 9 to the relative position of the cartridge 5, the adjustment mechanism of the position detection plate 9, which is composed of the mounting plate 8 and the position detection plate 9, should be inserted into the insertion groove of the flathead screwdriver. As shown in FIG. 7, since there are three locations, the movable range of the position detecting plate 9 is increased compared to the conventional example, and the position detecting plate 9 can be moved to any specified position.

In this embodiment, there are three insertion grooves for the adjustment screwdriver, but there is no need to limit the insertion groove for the adjustment screwdriver to three places.In order to widen the movable range of the position detection plate, the insertion groove for the adjustment screwdriver can be inserted in three places as necessary. It is also possible to increase the number of holes, or the shapes of the holes in the mounting plate 8 and the position detection plate 9 described in this embodiment may be interchanged.

Effects of the Invention As described above, according to the present invention, the dimensional accuracy of each component can be finished to a high degree of precision, and the assembly dimensions of the individual component parts can be assembled to a high degree of precision. The relative positional relationship between the two flat plates can be adjusted correctly.

[Brief explanation of drawings]

Figure 1 is a plan view of a typical record player, Figure 2 is a side view of the end detection mechanism that has an adjustment function that moves integrally with the pickup arm device, and Figure 3 is a diagram of a conventional adjustment mechanism. Plan view, Figure 4 is an enlarged view of the adjustment hole,
5 and 6 are plan views of a mounting plate and a position detection plate in an embodiment of the present invention, FIG. 7 is a plan view of a state in which they are combined, and FIG. 8 is a record player using the present invention. FIG. 9 is a partially cutaway plan view of the portion A in FIG. 8. 8...Mounting plate, 9...Position detection plate, 19
... W-shaped adjustment hole, 2Q ... Triangular adjustment hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 ■ @ 3 Figure 3 and Figure 4 I4 1. 5th fg4 Fig. 6 0 Fig. 7 8PA 9th fgJ f

Claims (1)

[Claims] It is equipped with two flat plates that move relatively, one flat plate is provided with a triangular adjustment hole, the other flat plate is provided with an adjustment hole having two or more peaks and valleys on one side, and the peaks and valleys of the adjustment holes in the other flat plate are provided. Adjustment of a combination flat plate characterized in that the two flat plates are stacked on top of each other so that the side having the side faces the vertex of the triangular adjustment hole of one of the flat plates and is located within the triangular adjustment hole. Device.