JPH06276709A - Miniature vibrator - Google Patents

Abstract

PURPOSE:To make unnecessary a weight to miniaturize a machine by unbalancing the balance of rotational magnetism for the rotor of a miniature motor by itself to generate rotational vibration. CONSTITUTION:The wire diameter of a coil 5c in three coils of a rotor 4 is made extremely thinner than that of the other coils 5a, 5b to unbalance the rotational balance. When a direct-current voltage is applied respectively to terminals 12a, 12b, a current flows into the coils 5a, 5b, 5c from a brush and a commutator 10, and the rotational force of the rotor is produced from the magnetic action of magnets 2, 3. When a current flows into the coil 5c, the rotational force is extremely attenuated as compared with the case where a current flows into the other coils 5a, 5b, so that rotational magnetic vibrations are produced. Thereby, a weight for generating vibrations is made unnecessary to be able to miniaturize a machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention receives a call signal from a pager or the like to generate vibration, and not a voice such as a buzzer
The present invention relates to a small vibration device for the purpose of making the body sense vibrations.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional vibrating body such as a hocket bell, in which a weight 21 having an extremely unbalanced weight is attached to an output shaft 20 of a small motor, and rotational vibration is generated and sensed by rotation of the motor.

[0003]

By the way, in the above-mentioned prior art, since the weight 21 is attached to the output shaft 20 of the motor, it is not only necessary to widen the interval so as not to contact other parts by rotation. However, in order to obtain a strong vibration, it is necessary to enlarge the weight 21, which is a serious obstacle for a hocket bell or the like that needs to be downsized.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and is characterized in that the magnetic balance of the rotating body of a small motor is lost during rotation to generate magnetic rotational vibration. To do.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention shown in the drawings will be described in detail. The magnets 2 and 3 having the inner surface of the arc are fixed to the case 1 of the magnetic body so as to face each other to form a fixed body. Reference numeral 4 denotes a rotating body around which coils 5a, 5b and 5c are wound. Reference numeral 6 is a part of the outer circumference of the rotating body, and is configured to widen the gap 8 with the inner peripheral surfaces of the magnets 2 and 3. Among the three coils of the rotating body 4, the wire diameter of the coil 5c is made extremely smaller than the wire diameters of the other coils 5a and 5b to unbalance the rotation. Brushes 11a and 11b are electrically connected to the terminals 12a and 12b. 9 is a bearing, 13 is a terminal 12a,
It is a bracket of 12b.

Next, the operation will be described. Similar to the principle of the small DC motor, a DC voltage is applied to each of the terminals 12a and 12b, and a current flows from the brushes 11a and 11b and the commutator 10 to the coils 5a, 5b and 5c to rotate the rotor by the magnetic action of the magnets 2 and 3. Power is generated. When a current flows through the coil 5c, compared with the case where a current flows through the other coils 5a and 5b, the rotational force is extremely weakened and the coil 5c rotates, causing rotational magnetic vibration.

[0007]

According to the present invention, since the rotational magnetic balance of the rotating body of the small motor is unbalanced to generate the rotational vibration, the weight is unnecessary and the equipment such as a pager can be downsized. it can.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a right side view of FIG.

4A is a side sectional view showing a conventional example, and FIG. 4B is a front sectional view showing a conventional example.

[Explanation of symbols]

 1 Case 2 3 Magnet 4 Rotor 5a, 5b, 5c Coil 6 Part of outer periphery of rotor 7 Shaft 8 Gap between magnet and 6 9 Bearing 10 Commutator

Claims (2)

[Claims] 1. A small motor is configured such that a gap between a part of an outer periphery of a rotating body and a magnet of a fixed body is widened, and rotational magnetic balance is unbalanced to generate rotational magnetic vibration. Small vibration device. 2. The small vibration device according to claim 1, wherein the plurality of partial windings wound around the rotating body are made into fine wires, and the rotational magnetic balance is unbalanced.