JPH0138682Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an attitude adjustment mechanism for a pickup section used in players and other electronic devices.

<Prior Art> General embodiments of a position adjustment mechanism using an eccentric shaft are shown in FIGS. 1 to 3.

FIG. 1 shows its components. A guide shaft 1 is provided on the adjusted plate A, an eccentric shaft B is fitted into the hole 3 of the substrate C, and the adjusted plate is inserted into the hole 2 of the eccentric shaft B which is eccentric by the required amount This is a mechanism into which the guide shaft 1 of A is inserted.

FIG. 4 shows the displacement of the adjusted plate on the substrate surface of this mechanism, with the center of the hole 3 as the starting point and the X and Y axes. According to this, FIG. 4b shows a state in which ΔY has been adjusted in the Y-axis direction from FIG. 4a. At this point, the displacement of ΔX in the X-axis direction that existed initially disappears. In other words, ΔX is not required in the X-axis direction.
This results in the disadvantage that displacement occurs.

<Purpose of the invention> The present invention aims to solve the above-mentioned drawbacks of the prior art and to provide a device with a simple structure that satisfies the inherent space-saving properties of an eccentric shaft.

<Examples> Examples of the present invention will be described below with reference to drawings.
5 to 8 show embodiments of the position adjustment mechanism using an eccentric shaft according to the present invention. C' is a base plate serving as a reference for the adjustment mechanism, and a hole 9 that fits the shaft 8 is bored therein. A′ is a plate to be adjusted, into which the eccentric cam 7 is inserted;
An oval-shaped recess 5 is provided so that the shaft 6 can be slid in a direction perpendicular to the desired adjustment direction by the amount of eccentricity, and an oval-shaped hole is provided that allows the shaft 6 to be inserted into the central inner wall of the oval-shaped recess 5 and slid in the adjustment direction by the amount of eccentricity. 4 is drilled.
B' is an eccentric shaft for adjustment, which is composed of concentric shafts 6 and 8 and an eccentric cam 7 that is eccentric by the necessary amount of adjustment. The above three parts are stacked in the order of A', B', and C', and the board C' and the adjusting plate A' are pressed together with a spring or the like (not shown).

In addition, Fig. 5 is a front view of the assembled state, and Fig. 6 is a front view of the assembled state.
It is a sectional view taken along the line D'-D' in the figure.

<Function> To explain the function of the present invention, the X and Y axes are taken on the substrate surface with the hole 9 as the center, and the relative positional relationship of the adjusted plate A' to the substrate C' is shown in the eighth figure. It is a diagram. In FIG. 8a, the center of the substrate C' and the center of the adjusted plate A', that is, the centers of the oval hole 4 and the oval recess are aligned. When the eccentric shaft is rotated from this state, since the eccentric cam 7 is fitted into the oval-shaped recess 5, it acts to move the adjusted plate A' in the Y-axis direction.
Since the shaft 6 concentric with the adjustment plate A' slides in the oval hole 4 drilled in the adjustment plate A', there is no movement in the Y-axis direction. FIG. 8b shows the state in which the eccentric shaft B' is rotated 90 degrees to the right in this manner.

As is clear from the above, the position adjustment mechanism using the eccentric shaft allows movement in only one direction.

<Effects> Conventionally, there has been a mechanism using an eccentric shaft as described in the prior art section as a simple position adjustment mechanism for the information transfer section of electrical and electronic equipment. Although dimensional adjustment can be performed by one means, it is not suitable for fine adjustment of today's pickup sections that require high-density, high-precision succession. However, the use of an eccentric shaft has the advantage that the configuration is simple and space can be saved, and since the adjustment shaft is sandwiched between the fixed object and the object to be adjusted, the mounting mechanism can be omitted.

By using the present invention, while having the above-mentioned inherent advantages of the eccentric shaft, it is possible to make delicate adjustments in only one direction without causing deviations in directions other than the adjustment direction.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the conventional mechanism, Fig. 2 is an assembled front view of the conventional example, Fig. 3 is a sectional view taken along the line D-D in Fig. 2, Fig. 4 is a plan view of the mechanism operation of the conventional example, and Fig. 5 is an exploded perspective view of the conventional mechanism. The figure is an assembled front view of the mechanism of the present invention, and Figure 6 is Figure 5 D'-
A sectional view taken along the line D′, FIG. 7 is an exploded perspective view of the mechanism of the present invention,
FIG. 8 is an operational plan view of the mechanism of the present invention. 1... Guide shaft, 2, 3... Hole, 4... Oval shaped hole, 5... Oval shaped recess, 6, 8... Shaft, 7... Eccentric cam.

Claims (1)

[Scope of utility model registration request] An oval hole and an oval recess are formed concentrically in two directions orthogonal to each other on an adjusted plate attached to a movable part, and a shaft that fits into the hole and an eccentric shaft that fits into the recess. An electrical and electronic device characterized in that an eccentric shaft consisting of a cam is fitted into the hole and the recess, respectively, and the shaft portion that is inserted into the oval hole is fixed on a substrate, so that the position can be adjusted only in one direction. Position adjustment mechanism for pick-up part.