JPH0570165U - Vibration generator motor - Google Patents

Abstract

(57) [Abstract] [Purpose] To secure the magnetic force of the rotor and reduce the outer diameter of the motor. [Structure] Inside a case 10, a rotor 13 whose axial height changes is attached to a shaft 12 supported by a bearing 11. Also, the case 10
A coil 14 corresponding to the rotor 13 is provided inside the coil.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vibration generating motor suitable for use in an individual selective call receiver that calls by vibration.

[0002]

[Prior Art]

 As shown in FIG. 3, a vibration generating motor that has been proposed in the past has a shaft 3 supported by a bearing 2 inside a case 1 and a rotating surface of the motor without changing its axial height. An eccentric rotor 4 whose shape is changed inside is attached, and rotation of the rotor 4 causes vibration to be generated. A coil 5 is arranged inside the case 1. The rotor 4 is composed of a fan-shaped magnet as shown in FIG. 4 and a fan-shaped coil as shown in FIG.

[0003]

[Problems to be solved by the device]

 However, the conventional vibration-generating motor configured as described above has a structure in which the rotor 4 is eccentric because the rotor 4 is formed in a fan shape. Therefore, in order to secure the size of the rotor 4, it is necessary to increase the radius of the rotor 4.

However, in order to rotate the motor, regardless of whether the rotor 4 is composed of a magnet or a coil, it is necessary to generate a necessary magnetic force. The size determines the outer diameter of the motor. Therefore, when the rotor 4 is enlarged, the outer diameter of the motor is increased accordingly.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a vibration generating motor that can reduce the outer diameter while ensuring the magnetic force of the rotor.

[0006]

[Means for Solving the Problems]

 In order to achieve this object, the present invention has a rotor mounted on a shaft arranged inside a case, and a rotor for rotating the shaft of a vibration generating motor configured to generate vibration by rotating the rotor. The rotor is located at the center of the rotor and the height of the rotor in the axial direction is changed.

[0007]

[Action]

 As described above, according to the present invention, the shaft is located at the center of the rotor. However, by changing the axial height of the rotor, the mounting position of the shaft is deviated from the center of gravity of the rotor. Since the structure is attached, it is possible to generate vibration by rotating this rotor. Therefore, with such a structure, the radius of the rotor can be reduced while sufficiently ensuring the size of the rotor, so that the outer diameter of the motor can also be reduced.

[0008]

【Example】

 Next, the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a vibration generating motor according to the present invention, and FIG. 2 is a perspective view of a rotor used in the vibration generating motor. A shaft 12 supported by a bearing 11 is arranged inside the case 10, and a rotor 13 that generates vibrations by its rotation is attached to the shaft 12.

That is, in the present embodiment, the shaft 12 is located at the center of the rotor 13, but the rotor 13 has a height dimension in the axial direction that is left end as shown in the drawing. The configuration is such that it gradually increases from the part to the right end. Therefore, in this rotor 13, the mounting position of the shaft 12 and the position of the center of gravity of the rotor 13 are deviated from each other, and the rotation of the rotor 13 causes vibration. A coil 14 is arranged inside the case 10 so as to correspond to the rotor 13.

As described above, in the configuration of this embodiment, the shaft 12 is present at the center position of the rotor 13, and the axial height of the rotor 13 is changed. It is possible to reduce the radius of the rotor 13 while ensuring a sufficient size of the rotor 13, and thus to reduce the outer diameter of the motor accordingly.

[0011]

[Effect of the device]

 As described above, according to the vibration generating motor of the present invention, the shaft is located at the center of the rotor and the axial height of the rotor is changed. It is now possible to reduce only the radius of the rotor without reducing the size of the rotor. Therefore, according to the present invention, there is an excellent effect that the outer diameter of the motor can be reduced while sufficiently securing the magnetic force of the rotor.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a vibration generating motor according to the present invention.

FIG. 2 is a perspective view of a rotor used in the vibration generating motor according to the present invention.

FIG. 3 is a sectional view showing an example of a conventional vibration generating motor.

FIG. 4 is a perspective view showing an example of a conventional rotor.

FIG. 5 is a perspective view showing another example of a conventional rotor.

[Explanation of symbols]

 10 case 12 axis 13 rotor

Claims (1)

[Scope of utility model registration request] 1. A vibration generating motor configured to attach a rotor to a shaft arranged inside a case and to generate vibration by rotating the rotor, wherein the shaft is located at a central portion of the rotor. A motor for vibration generation, characterized in that the height of the rotor in the axial direction is changed.