JPH06217512A - Hall motor - Google Patents

Abstract

PURPOSE:To easily and accurately position Hall elements mounted on printed boards by forming recessed sections in an insulator and arranging each Hall element in each recessed section. CONSTITUTION:The motor is provided with recessed sections 3a formed in the peripheral section of a lower insulator 3 so that the sections 3a can be accurately aligned with Hall elements 12 to be arranged in the sections 3a and the shapes of the sections 3a can meet the shapes of the elements 12. Since each Hall element 12 is set in each recessed section 3a of the insulator 3, the elements 12 can be extremely easily positioned with high accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hall motor.

[0002]

2. Description of the Related Art Generally, a hall motor rotates a rotor by attracting and repulsing a rotor (magnet) by energizing a plurality of coils, and detects the magnetic force of the magnet by a hall element. Based on this detection signal. The rotor is rotated in a fixed direction by changing the direction of the current flowing through the coil.

Of these Hall motors, for example, a conventional example of an outer rotor type is shown in FIGS. 3 and 4. In these figures, 1 is a core, which is formed by laminating silicon steel plates and the like. Reference numeral 2 is a coil wound around the core 1, and three coils are wound in the illustrated one. An insulator 3 is arranged so as to cover the core 1. Reference numeral 4 is a ring-shaped magnet and is joined to the yoke 5 by a joining means such as an adhesive. 6
Is a holding member. The magnet 4, the yoke 5, and the holding member 6 are fixed to the shaft 7. Reference numeral 8 is a bearing fixed to the bearing housing 9. The core 1 is also fixed to the bearing housing 9. Reference numeral 10 is a mounting substrate, 11 is a printed circuit board screwed to the mounting circuit board 10, and 12 is a Hall element mounted on the printed circuit board 11.

[0004]

In such a hall motor, the position of the hall element must be accurately arranged, and in the conventional hall motor, accurate positioning and adjustment of the hall element are troublesome.

It is an object of the present invention to provide a hall motor in which the hall element can be easily positioned and can be accurately positioned.

[0006]

According to the Hall motor of the present invention, a recess for arranging the Hall element is formed in the insulator, and the recess is used for positioning the Hall element to enable accurate positioning. . That is, it is formed by a core, a coil wound around the core, an insulator for insulating the coil and the core, a rotor made of a magnet, etc., and a hole is formed in, for example, a lower part of the insulator among these components. A concave portion for arranging an element is formed, and a hall element attached to a printed circuit board is arranged in the concave portion.

[0007]

EXAMPLE An example of the hall motor of the present invention will be described below. 1 is a sectional view of a first embodiment of the present invention, and FIG. 2 is a view showing an insulator of the above embodiment. In FIG.
1 is a core, 2 is a coil, 3 is an insulator, 4 is a ring magnet, 5 is a yoke, 6 is a holding member, 7 is a shaft, 8 is a bearing, 9 is a bearing housing, 10 is a mounting substrate,
A printed circuit board 11 is substantially the same as the conventional Hall motor shown in FIGS.

Further, in the embodiment of the present invention, the lower insulator 3 has a shape as shown in FIG.
a is formed, and the Hall element 12 is arranged in this recess. The recess 3a is accurately positioned at the position where the Hall element 12 is arranged, and the shape of the recess is a shape that matches the shape of the Hall element. For example, when the Hall element is trapezoidal as shown in FIG. 5, the recess 3a is also trapezoidal as shown in FIG. Therefore, by disposing the Hall element 12 in the recess 3a of the insulator 3, accurate positioning can be easily performed. By thus combining the Hall element axially attached to the printed circuit board 12 so as to be inserted into the concave portion 3a serving as the Hall element holding portion, a Hall motor can be easily formed and the hose element can be accurately positioned.

Although the above-mentioned embodiment applies the present invention to the outer rotor type hall motor, it can also be applied to the inner rotor type hall motor by making some modifications.

[0010]

According to the hall motor of the present invention, the positioning adjustment of the hall element is extremely simple and accurate positioning is possible.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of an insulator used in the above embodiment.

FIG. 3 is a sectional view of a conventional hall motor.

FIG. 4 is a diagram showing how a hall element of a hall motor is attached to a printed circuit board.

FIG. 5 is a diagram showing an example of a Hall element.

[Explanation of symbols]

 1 core 2 coil 3 insulator 4 printed circuit board 5 hall element

Claims (1)

[Claims] 1. A hall motor in which a hall device is provided with a recess for arranging the hall element, and the hall element mounted on a printed circuit board is arranged in the recess to enable accurate positioning of the hall element.