JPH0217853A - Motor for vibration alarm - Google Patents

Abstract

PURPOSE:To reduce power consumption and cost and to enhance reliability by vibrating and rotating a motor itself. CONSTITUTION:The rotor 5 of a flat motor for forming a vibration motor is composed by varying the number of turns of one of three segment coils 5. Thus, after a cylindrical commutator 4 is engaged with a shaft 1, a flat elliptical segment coil 5 composed by lap winding a self-adhering wire blank is disposed in the same plane, wired as predetermined, then molded with resin, filled to be solidified with solidifying agent such as molding resin adhesive, etc., between the coil 5 and the commutator 4 to thereby form a rotor 6. The number of turns of the coil 5-3 of the coils 5 is reduced from those of other coils 5-1, 2 to collapse the rotary balance of the rotor 6 itself thereby to obtain the vibration motor. Thus, the attachment of an expensive weight can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a vibration motor housed in a device for notifying an alarm to a person carrying a device such as a pager.

[Prior Art] A conventional pager is a system in which, upon receiving a calling signal from a specific caller, the pager notifies the user with an alarm sound and calls the user.

[Problems to be Solved by the Invention] In devices that provide notification using an alarm sound, the alarm sound is also emitted to the surroundings, which often causes discomfort to people in the vicinity other than the user himself/herself. Therefore, a device has been proposed that vibrates the device itself without emitting an alarm sound, and directly notifies only the person carrying the device of the alarm through vibration. As shown in Figure 2, its structure houses a motor 3 with a weight 2 with an eccentric center of gravity attached to a shaft 1, and the rotation of the motor causes the entire device to vibrate due to the vibrations generated due to the unbalanced rotation of the motor itself. be. However, it has the disadvantage that the motor drive power consumption increases due to the load caused by attaching the weight, which cannot be ignored due to the limited capacity of a small battery for portable use, and the weight may come off the shaft, and the weight itself is made of tungsten alloy. There were many problems such as increased costs due to the need to use

In view of this point, the present invention vibrates and rotates the motor itself to achieve low power consumption and high reliability.

The purpose is to provide a new low-cost vibration motor.

[Means for Solving the Problems] The present invention eliminates the vibrational rotational effect on the motor itself by actively disrupting the rotational balance, whereas in conventional general motors the rotational balance of the motor itself is kept constant. In other words, in a device for notifying an alarm by transmitting vibration by housing a photographing motor in a photographing alarm device, the motor itself has a means for changing the rotational balance, and as the means, For the rotor coil, changing the winding resistance of at least one of the coils, changing the number of turns of at least one, changing the thickness of at least one of the coils, changing the position of at least one of the coils with respect to the shaft, and changing the rotor core. For this purpose, the position of the shaft may be shifted, and for the field magnet, the magnetic force of at least one pair of poles may be changed. The motor of the present invention can be applied to either a cylindrical type or a flat type.

[Example] Fig. 1 is a perspective view of a rotor when the present invention is applied to a flat motor, and (a) is an example in which the number of turns of one of the three segment coils is changed, and the cylindrical commutator 4 The shaft 1
After this, the flat, approximately elliptical segment coil 5, which is constructed by overlapping self-fusion wires, is arranged on the same plane and predetermined connections are made, and then a fixing agent such as molding resin or adhesive is applied. By filling and solidifying the space between the segment coil 5 and the cylindrical commutator 4, a circle 6 is formed. The number of turns of 5-3 of this segment coil is 5-1. A vibration motor can be obtained by setting the number of turns to be less than 5-2 and disrupting the rotational balance of the rotor itself. (b
) are three segment coils 5-1. 5-2. 5-
(C) is an example in which the position of shaft 1 of 5-4 of 4 is moved closer to shift 1, and (C) is an example in which the position of shaft 1 is shifted toward segment coil 5-2 with respect to 6 cores.

[Effects of the Invention] As described above, according to the present invention, it is possible to vibrate the device itself without emitting an alarm sound, and directly notify only the wearer of the alarm by vibration, which is superior to the conventional method for such vibration alarms. Compared to the motor-rotated type, there is no need to attach expensive weights, resulting in a significant cost reduction, lower motor drive power consumption, and improved battery life for portable use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a rotor in a photographing motor of the present invention. FIG. 2 is a perspective view showing a conventional vibration motor. 1: Shaft 5: Segment coil 6; Rotor Patent applicant Namiki Precision Jewel Co., Ltd. Figure (b) Figure

Claims (7)

[Claims] (1) A vibration alarm motor in which a vibration motor is housed in a vibration alarm device to notify an alarm by transmitting vibration, characterized in that the motor itself has a means for changing the rotational balance. (2) Claim (1) wherein the means is to change at least one winding resistance in a single coil of the rotor coil.
) vibration alarm motor. (3) The vibration alarm motor according to claim (1), wherein said means is to change the number of turns of at least one of the single coils of the rotor coil. (4) Claim (4) wherein the means is to change the thickness of at least one coil in a single coil of the rotor coil (
1) Motor for vibration alarm described. (5) The vibration alarm motor according to claim (1), wherein the means includes changing the position of the rotor coil with respect to at least one shaft in the single coil. (6) The vibration alarm motor according to claim (1), wherein said means is to shift the position of the shaft with respect to the rotor core. (7) The vibration alarm motor according to claim (1), wherein said means changes the magnetic force of at least one pair of poles of the field magnet.