JPS6142181Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joystick control device composed of a permanent magnet and a magnetoresistive element.

Generally, cursor control for CRT displays,
Joystick control devices are used for two-dimensional control of TV games, etc., and remote three-dimensional control of car mirrors. For example, for two-dimensional control, a control stick 1 as shown in FIG. 1 was used. This control stick 1 has two fixed transducers 2 and 3 arranged in the X and Y directions,
It is configured to directly face the X and Y planes at the zero position in the Z direction. Also, control stick 1 is X and Y.
When the fixed transducers 2 and 3 rotate freely in two directions, and coincide with the Z axis, the output of each fixed transducer 2 and 3 becomes zero.
When the control stick 1 is displaced from the Z-axis, the displacement angle components in the X and Y directions are resolved into rotation angles of the respective transducer shafts 4 and 5, and electrical output signals are extracted. However, such a joystick control device mechanically decomposes the movement of the control stick 1 into X and Y components using mechanical parts such as the engagement pin 6 and the crank 7, and rotates the fixed transducer shafts 4 and 5. Since the operation is performed by moving the robot, the structure is complicated and smooth operation cannot be expected. Furthermore, since the fixed transducers 2 and 3 use variable resistors such as volumetric resistors, they have the drawbacks of generating sliding noise and shortening their lifespans due to wear.

In view of the above-mentioned conventional drawbacks, this invention improves and improves them.
This is a non-magnetic material that is composed of a spherical member that can be rotated by a control stick and a magnetoresistive element placed at a fixed position near the spherical member, and that supports the magnetoresistive element so that the spherical member can freely precess. A joystick control device is provided, characterized in that it is embedded in a support part. Hereinafter, the configuration of the present invention will be explained with reference to each embodiment shown in the drawings.

For example, when a first embodiment that performs two-dimensional control is shown in FIGS. 2 and 3, 8 is a non-magnetic control stick, 9 is a handle fixed to one end of the control stick 8, and 10 is a control stick 8.
It is a spherical member having a pair of magnetic poles fixed to the other end, and in the illustrated example, it has a structure in which a rod-shaped permanent magnet 11 aligned in the axial direction of the control stick 8 is molded with a spherical non-magnetic resin ball 12. 13a, 13
b and 13c are three independent non-magnetic support members that hold the spherical member 10 so that it can rotate around its center point, that is, freely precess, and two opposing support members 13a and 13c are spherical members. 10 in the X direction, and the remaining support member 13b supports the spherical member 10 in the Y direction orthogonal to the support member 13a. Each of the support members 13a, 13b, 13c has concave spherical receiving surfaces 14a, 14b, 14c having approximately the same curvature as the spherical surface of the resin ball 12 of the spherical member 10 on the inner side.
Magnetoresistive elements 15a and 15b are embedded in at least two supporting members 13a and 13b arranged orthogonally to each other along a plane perpendicular to the X and Y axis directions. Moreover, two grooves 16 and 17 are carved on the outer surface side of each support member 13a, 13b, 13c, and the spherical member 10 is supported by each receiving surface 14a, 14b, 14c of each support member 13a, 13b, 13c. While holding the support members 13a, 1, a ring-shaped spring body (not shown) is fitted into each groove 16, 17 from the outside.
3b and 13c are elastically pressed against the spherical member 10 to apply appropriate rotational torque to the spherical member 10.

The magnetoresistive elements 15a and 15b are, for example, the fourth
As shown in the figure, an MR stripe 19 made of an iron-nickel foil film is formed on an insulating substrate 18 by a printing method or the like, and an appropriate number of terminals 20 are taken out from this MR stripe 19. Then, like a normal molded semiconductor device, the magnetoresistive element 15
The main parts of a and 15b are resin molded to form the support member 1.
3a and 13b are configured. This support member 13
The terminals 20, 20 are projected from the bottom surfaces of a, 13b. The protruding terminals 20, 20 are electromechanically connected and fixed to a printed circuit board 21 or the like.
A bias voltage Vo is applied to each magnetoresistive element 15a, 15b, and the output voltage V is expressed as V=1/2αVosin2θ _a (also θ _b ). However, θ _a (or θ _b ) is the permanent magnet 11 incident on the magnetoresistive table 15a (or 15b).
The incident angle of the magnetic field, α, is the resistance change rate of the magnetoresistive element.

According to the above configuration, each magnetoresistive element 15a, 15
b are arranged at substantially the same position from the center of the spherical member 10, that is, from the center of the permanent magnet 11, on planes perpendicular to each other, and since the permanent magnet 11 rotates around the center point, both magnetic resistance elements 15a, 15b
The strength of the magnetic field incident on the permanent magnet 11 is always constant, and its incident angles θ _a and θ _b are displaced in accordance with the rotation angle of the permanent magnet 11 . Therefore, when the control stick 8 is rotated in any direction from the Z axis to the X and Y axes, the inclination of the control stick 8 is outputted separately in the X and Y directions by the respective magnetic resistance elements 15a and 15b. Two-dimensional control is also performed on each of these outputs.

Next, other embodiments of the present invention will be described in sequence.

In the second embodiment shown in FIG. 5, the spherical member 10 is held by two supporting members 13d and 13e so that it can freely precess from 180° opposite directions, and one supporting member 13d has two magnetic fields perpendicular to each other. Resistance element 15d ₁ ,
15d ₂ was buried. In this case, as in the first embodiment, each of the magnetoresistive elements 15d ₁ and 15d ₂ outputs an output in accordance with the displacement of the control stick 8, and two-dimensional control is performed.

In the third embodiment shown in FIG. 6, the spherical member 10 is arranged in three support members 13f, 13g,
13h, and one magnetoresistive element 15f, 15g, 15h is embedded in each supporting member 13f, 13g, 13h. In this case, three-dimensional control is possible.

The fourth embodiment shown in FIGS. 7 and 8 is a spherical member 10.
Four supporting members 13i, 1 that hold from four directions
3j, 13k, and 13l are integrally connected on the bottom side, and in the case of two-dimensional control, for example, the magnetoresistive element 1 is connected to two orthogonal support members 13i, 13j.
5i and 15j are buried. Although it is difficult to mold a plurality of supporting members integrally molded in advance in this way, it is convenient to handle. Also, the spherical member 10 is attached to each support member 13i, 13j, 13k, 13l.
The spherical member 10 may be deformed slightly outward, and after mounting, the spherical member 10 may be held elastically by the spring force of the restoring force of each support member 13i, 13j, 13k, 13l.

Note that the present invention is not limited to the above embodiments, and can be modified in various ways. For example, the spherical member 10 may be replaced with a permanent magnet 11.
In addition to molding the resin ball 12, the entire ball may be made of a permanent magnet. Furthermore, the receiving surface of the support member that holds the spherical member 10 is not limited to a concave spherical surface, but can also be a conical groove that makes line contact with the spherical outer shape of the spherical member 10. Any shape of the receiving surface that can be held movably is sufficient.

As explained above, in the present invention, the magnetic resistance element is embedded in the support member that holds the spherical member integrated with the control stick so that it can freely precess, so the structure is simplified and assembly is easy. A highly reliable non-contact joystick control device can be provided.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional joystick control device, Fig. 2 is a plan view showing a first embodiment of the present invention, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a 5 to 7 are plan views showing other embodiments of the present invention, and FIG. 8 is a sectional view taken along line B-B.
It is a sectional view taken along line C-C in the figure. 8... Control stick, 10... Spherical member, 13a, 1
3b, 13c...13l...Supporting member, 14a, 1
4b, 14c...receiving surface, 15a, 15b, 15c
...15j... Magnetoresistive element.

Claims (1)

[Scope of utility model registration request] A non-magnetic material having a spherical member having a control stick and a permanent magnet, a plurality of receiving surfaces that support the spherical member so as to freely precess from at least two directions, and in which at least two magnetoresistive elements are embedded. 1. A joystick control device comprising: a supporting member;