JPS6354784A - Noncontact type potentiometer - Google Patents

Abstract

PURPOSE:To easily magnetize magnetic field generating means by forming the magnetic field generating means of a flexible magnetic material, and magnetizing the means in a linear state immediately before the means is bent in a predetermined shape. CONSTITUTION:A rotatable rotor 8 provided in a housing 10, and an insulating substrate 1 having ferromagnetic magnetic resistance elements 2a, 2b of predetermined shape disposed at a predetermined interval from the rotor 8 concentrically with the rotor 8 are provided. Further, magnetic field generating means 6 so mounted as to form a closed magnetic path with the elements 2a, 2b at the rotor 8 side. The means 6 is formed of a flexible magnetic material, and magnetized in a linear state before the means 6 is bent in a predetermined shape. The means 6 is, for example, composed of a material in which magnetic material powder is dispersed in the plastic of the flexible material, disposed concentrically with the elements 2a, 2b, and escapes 6a, 6b directed externally are provided at both ends.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a non-contact potentiometer that rotates a rotor, and particularly to a potentiometer that reduces resistance by magnetic force.
This relates to a non-contact potentiometer using a resistance (A!-).

[Conventional Technique (i) The magnetic circuit of a non-contact potentiometer has conventionally been formed into a right-bottom cylindrical shape 2] A, a rotating magnetic body, a permanent stone, and a closed (B).
In3n, which is a magnetoresistive water element, is arranged in a gap formed at the tip of the rotating magnetic body to generate an output corresponding to the rotation of the rotating magnetic body. However, by changing the size of the gap formed at the tip of the rotating magnetic body, it is possible to change the size of the gap formed at the tip of the rotating magnetic body by processing the tip of the rotating magnetic body into a predetermined shape.
The predetermined function output from the nsbfi magnetoresistive element is 19.

[Problem to be solved by the invention 1 In this case, as disclosed in Japanese Patent Application No. 72201/1980, since the permanent magnet is curved in a semicircular arc shape, when magnetized in the radial direction of the permanent magnet, , there is a problem that 6 magnetization is difficult in this direction.

This invention was made in view of the above circumstances, and by forming the magnetic field generating means from a flexible bamboo material, magnetization can be performed in advance in a straight line state, and such magnetization can be performed extremely easily. The purpose of the present invention is to provide a non-contact bouncy meter with excellent effects.

[Means for Solving the Problems] The present invention includes a housing, a rotor rotatably provided within the housing, and a rotor that is concentric with the rotor and spaced from the rotor by a predetermined distance. A closed (closed) n path is formed by the insulating tube which holds the strong 1-n magnetic resistance M'r of a predetermined shape and the 11h magnetic resistance resistor R on the low side. The Ln magnetic field generating means is mounted as shown in FIG. The structure is characterized by magnetization in a straight line state.

Effect 1 According to the present invention configured as described above, by forming the magnetic field generation means from a flexible bamboo material (1), it is possible to You can now wear it in the thickness direction, making it possible to wear large clothes L1.
) +; 31 allows a stronger magnetic field to be applied, and 6 makes it easier to monitor.

[Effect of the invention 1] According to the invention configured as described above, by forming the magnetic field generating means from a flexible bamboo material (1), It is possible to provide a non-contact type 1-meter with excellent effects such as being able to be magnetized by using the IF method and being inexpensive.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. 1st
The figure shows an embodiment of the present invention, and figure (a) is a top view thereof, and figure (b) is a cross-sectional view taken along line X-XI2 in figure (al). On the insulating substrate 1 as a circular or polygonal shape with a frontage part,
A strong material consisting of a thin film of Ni-Fe, N1-co, etc.
otq, tac resistors 2a and 2b are formed, one end 3 of the opening is connected to the power supply voltage Vcc, and the other terminal 4 is grounded (GND). In addition, the output terminal 5 is output from inside the ferromagnetic magnetoresistive elements 2a and 2b.
Take it out as ut and connect it like so. A semicircular arc-shaped permanent magnet 6 is attached to the insulating g% plate 1 as a field generating means at a predetermined distance from the ferromagnetic magnetoresistive elements 2a and 2b.
The ferromagnetic magnetoresistive elements 2a and 2b are attached to the C
There is.

To explain this state or mode more clearly by highlighting 4 in FIG. It is oriented in the vertical direction, and the upper surface of the housing 7 is supported by a circular bearing 10. A case 11 is provided in a closed state at the lower end of the housing 7, and an insulating base (reverse 1) is attached to the top surface of the case 11.A permanent magnet 6, which serves as a magnetic field generating means, has a 21-arc shape; is attached to the outer peripheral surface of the rotor 8 and arranged concentrically around the outer periphery of the ferromagnetic magnetoresistive elements 2a and 2b.

At this time, both 0::' portions of the permanent magnet 6 have relief portions 6t' formed so as to be oriented outward. , there is 6b,
This prevents the magnetic field J from reaching the ferromagnetic resistance elements F2a, 2b on the opposite side from the permanent magnet 6 as much as possible.

This permanent magnet 6 is made of a flexible material (for example, Ln material powder is dispersed in SBR rubber), and in this state it is attached in the radial direction as shown by the symbol M in FIG. 1(a). The permanent magnet 6 and the ferromagnetic resistance element 2a are shown as symbol i in FIG. 1(b).
A closed magnetic path is formed as shown in .

Moreover, the permanent magnet 6 has ferromagnetism (n-resistance ds r2 a
−.

Ferromagnetic magnetoresistive element 2 with the center of 2b as the center of the rotation axis.
It rotates in the circumferential direction of a and 2b, and the permanent magnet 6
In actual embodiments, the absolute value of the strength of the magnetic field generated toward the ferromagnetic magnetoresistive element 2a is set to be equal to or higher than the saturation (zero field strength) of the ferromagnetic magnetoresistive element 2a. Further, the magnetic field is marked 1) in a direction perpendicular to the circumferential direction of the ferromagnetic t6 resistor 2a, that is, in the radial direction.

Next, when the potentiometer ferromagnetic magnetoresistive elements 2a and 2b constructed as described above are subjected to a magnetic field from the permanent magnet 6 in a direction perpendicular to the current direction, their resistance value decreases. As the permanent magnet 6 rotates in the circumferential direction of the ferromagnetic resistance elements 2a and 2b, the part of the ferromagnetic resistance element 28 in which the resistance is reduced by one rotation also rotates continuously. Therefore, the resistance (direct) between the 8 ground terminal and the output terminal ■out, and the resistance (as a divided voltage value of the power supply voltage VCC determined by the ratio with the resistance between the output terminal vout and the power supply voltage Vcc terminal) The value of the output Vout is 0'!2, which has a straight linearity as shown in Figure 2.

In addition, in Fig. 3, the rotation angle Qdcg means that the straight side 6C of the permanent magnet 6 in Fig. 1 is perpendicular to the line X-X in the figure, and when the permanent un 'fli 6 is placed on the left side in Fig. 1a. It is. Further, although FIG. 3 shows the characteristic of clockwise rotation in FIG.

As shown in the graph of FIG. 4 (solid line), the ferromagnetic magnetoresistive elements 2a and 2b decrease their resistance when subjected to the magnetic field intensity (absolute field) of the saturated II field (-dotted chain line). is constant (the resistance value is approximately constant), so the output VO
ut(7) value is implemented (on RI1, permanent magnet G6 installation C)
Wrong 7! 31; This eliminates the dependence on slight fluctuations in adhesion of just over 1nm. In addition, in FIG. 4, the characteristics of lnsb are shown by dotted lines, and it can be seen that in lnsb, the culm resistance ■ becomes large as the magnetic field strength becomes large.

In this way, in the above configuration, it is possible to use the permanent magnet 6 with magnetic powder dispersed therein! Due to the fact that it is made of Q material, it is possible to attach the permanent 16 stones 6 in a straight line in the 19 horizontal direction during magnetization, making magnetization extremely easy. can be provided.

Next, FIGS. 5(a) and 5(b) show a second actual droplet example of the present invention. The differences between this second embodiment and the first embodiment are as follows. In other words, in the first embodiment, the permanent magnet 6 was positioned around the ferromagnetic magnet 11 (wave elements 2a, 2b), but in this second embodiment, the permanent magnet 6 and the strong magnetic field were located at the outer periphery of the ferromagnetic magnet 11 (wave elements 2a, 2b). 2a and 2b, and are positioned so that the permanent magnet 6 and the ferromagnetic resistor 2a correspond vertically.In addition, in this second embodiment, the escape in the first embodiment IZI is Sections 6a and 6b are omitted.

The escape parts 6a and 6b are not necessarily necessary, and can be omitted if they are unnecessary.

Even with this configuration, 1A east is I' as in the first embodiment.
? It will be done. In this second embodiment, the same parts as in the first swallow example are given the same reference numerals, and only the different parts are explained.

FIGS. 6(a) and 6(b) show a third embodiment of the present invention.

In this third embodiment, a stone 6 is added to the permanent C4 in the first embodiment.
(1 direction is shown in Fig. 6 (bl) as the radial direction and (J direction) as shown by the symbol i. Let's do it 1゜Figure 7 (a
) and (b) show a fourth embodiment of the present invention. In this fourth actual tJ color example, the direction of magnetization of the permanent magnet 6 in the second embodiment is perpendicular to the thickness direction, as shown by the symbol M'' in FIG. 7(b). C1 An m path as shown by the symbol i in the same figure is formed.

j3,'' - implementation (in the column, strong 10 resistance 11i resistance X'
The shape of the rotor 2a, 2b (although the shape is circular or polygonal, the shape is not limited to this, and may be a strip shape, for example. Alternatively, the rotational displacement of the rotor and the direct P2☆ position may be taken out simultaneously.

Further, in the above embodiment, a permanent stone 6 as a magnetic field generating means is used.
Although styrene-butadiene rubber was used to form the rubber, it is not limited to this, and any flexible material that can be freely gripped in any direction, such as Plus Deck, may be used.

In addition, various changes may be made in the specific implementation without departing from the gist and gist of the invention.

[Brief explanation of drawings]

The first example shows an embodiment of the bonsicometer of the present invention, and FIG. 11A shows a top view thereof, and FIG. Fig. 2 is a vertical cross-sectional view, Fig. 3 is a graph showing the output characteristics of the embodiment in Fig. 1, and Fig. 4 is a graph showing the output characteristics of the embodiment in Fig. 1.
Graphs showing the characteristics of magnetic magnetoresistive elements, Fig. 5(a), (
b) is a top view and a sectional view showing a second embodiment of the present invention;
FIGS. 6(a) and (b) are a top view and a sectional view showing a third embodiment of the invention, and FIGS. 7(a) and (b) are a top view and a sectional view showing a fourth embodiment of the invention. Figure 8 is a graph showing the output characteristics. In the figure, 1... Insulation board (1 circuit board) 2a, 2b
...Strong 1149611 Claw resistance element 6...Permanent...Stone (ta) Magnetic field generating means 7...Housing 8...Rotor 9...Rotating shaft 10...Bearing

Claims (1)

[Claims] 1) A housing, a rotor rotatably provided within the housing, and a ferromagnetic material of a predetermined shape disposed concentrically with the rotor and spaced from the rotor by a predetermined distance. an insulating substrate having a magnetoresistive element; and a magnetic field generating means mounted on the rotor side so as to form a closed magnetic path with the ferromagnetic magnetoresistive element, the magnetic field generating means being formed of a flexible magnetic material. A non-contact type potentiometer, characterized in that the magnetic field generating means is magnetized in a straight state before being bent into a predetermined shape. 2) The non-contact potentiometer according to claim 1, wherein the magnetic field generating means has outwardly directed relief portions at both ends. 3) The non-contact potentiometer according to claim 1, wherein the magnetic field generating means is made of a material in which magnetic material powder is dispersed in a flexible plastic material. 4) The non-contact potentiometer according to claim 1, wherein the magnetic field generating means is arranged concentrically with the ferromagnetic magnetoresistive element.