JPH03107347A - Vibration type flat brushless motor - Google Patents

Abstract

PURPOSE:To make thin the overall thickness and to reduce the diameter by shifting a rotor comprising a permanent magnet from a rotary shaft, or attaching a weight to the rotor thereby shifting the center of gravity. CONSTITUTION:The rotor of a vibration type flat brushless motor 1 consists of a rotor plate 8 fixed to a rotary shaft 4 and a permanent magnet 9 fixed to the top. On a stator board 12, a hybrid type coil 13 is formed. As a vibration generating mechanism, the axis of the rotor plate 8 or the permanent magnet 9 is shifted from the rotary shaft 4, a weight 14 or 16 is installed at one part of the periphery or the plane part of the permanent magnet 9, or a weight 15 is installed at one part of the inside periphery or the outside periphery. By the rotation of a rotary part, vibration occurs by said vibration generating mechanism, and this is taken out as output and is made use. This way, desired vibration can be set freely based on the eccentricity and the size of the weight.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flat brushless motor that generates vibrations.

Conventional technology As a conventional vibration generating motor, the
As disclosed in Japanese Patent No. 460, in a brushed motor that generates rotational torque by a stator having a permanent magnet and a rotor having a coil, a weight is provided on a part of the surface of the rotor having the coil facing the stator. Some devices are equipped with a stator that generates vibrations during rotation, and as disclosed in Japanese Utility Model Application Publication No. 63-88060, a stator with a permanent magnet and a rotor with a coil are used. In a brushed motor that generates rotational torque, the coil of the rotor is formed into an air-core shape, and a magnetic weight is embedded in the air-core portion to generate vibrations when the motor rotates. There are things that exist.

Problems to be Solved by the Invention According to the conventional example disclosed in Japanese Utility Model Application No. 63-105460 mentioned above, since a weight is superimposed on a part of the opposing surfaces having a coil, the motor can be moved by the thickness of the weight. There was a problem in that the overall thickness became thicker, which hindered the ability to make the device thinner. Furthermore, according to Japanese Utility Model Application Publication No. 63-88060, the rotor coil is formed into an air-core shape, and a magnetic weight is embedded in the air-core portion, which is difficult to manufacture and increases the cost. There was a problem.

Each of the above-mentioned conventional examples is lightweight, thin, short, and compact, which is currently the most desired.
There was a major problem that made it impossible to satisfy the requirements such as low price.

Means for Solving the Problems The present invention has been developed to solve the problems of the above-mentioned conventional examples. That is, the vibrating flat brushless motor of the present invention is a brushless motor in which rotating torque is generated by a stator having a coil formed of a patterned conductor and a rotor having a permanent magnet. The rotor is configured so that vibrations are generated by the eccentricity or eccentric center of gravity of the rotor.

Function: The vibrating flat brushless motor of the present invention can be manufactured to have an overall thickness as small as possible and a diameter as small as possible.

Furthermore, the present invention is easy to manufacture and can be provided at low cost. Also, the present invention can be easily modified to generate different vibration forces depending on the application.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings shown as an embodiment of the configuration of a vibrating flat brushless motor according to the present invention will be described in detail.

Mainly in Figure 1, (1) shows the whole vibrating flat brushless motor, (2) is a bearing housing with a bottomed hole, and this bearing housing (2) is equipped with a rotating motor through a bearing (3). A lower half of the shaft (4) is rotatably supported, and a sleeve (5) is mounted on the upper half of the rotary shaft (4).
is fixed so that it can rotate integrally.

A back yoke (6) is fixed to the upper end of this sleeve (5), and a lower peripheral flange (7) of the sleeve (5)
is formed, and this tsuba (7) has a rotor plate (
The base portions of 8) are integrally joined by caulking means to be described later. A donut-shaped permanent magnet (9) is mounted and fixed on the upper surface of the rotor plate (8). (10) is a flange formed on the outer periphery of the lower end of the bearing housing (2), and this flange (10) is attached to the case (11).
) are integrally joined by caulking means to be described later. (12) is a stator board fixed to the upper end of the case (11), and the surface of the stator board (12) facing the permanent magnet (9) is equipped with, for example, a hybrid coil (hereinafter simply referred to as a coil). )(13) is formed.

In the thin brushless motor configured as described above, there are the following embodiments of the structure that generates vibrations due to the rotation of the permanent magnet (9), namely, the first embodiment, FIG. 2A, and FIG. As shown in FIG. B and FIG. 2C, the axis of the permanent magnet (9) or rotor plate (8) is
), or the axis of the rotating shaft (4) is set to a permanent magnet (9) or a rotor plate (8).
) Eccentric configuration (b) with respect to the axis.

Second Embodiment As shown in Figure 3A and Figure 3B, a permanent magnet (9)
A configuration in which one or more weights (14) are attached to a part of the outer peripheral surface of the device.

Third Embodiment As shown in FIG. 4, a weight (1
5) is installed.

Fourth Embodiment As shown in FIG. 5, one or more weights (16) are attached to a part of the flat surface of a permanent magnet (9).

By applying the vibration generating structure described in the first to fourth embodiments to the thin brushless motor described above, desired vibrations can be obtained when the motor rotates.

Next, the outer periphery of the flange (7) formed on the sleeve (5), the inner periphery of the base of the rotor plate (8), the outer periphery of the flange (10) formed on the bearing housing (2), and the case (11).
As shown in FIGS. 6 to 10, the inner circumferential edges of the bases of the connectors (8a), (7a), (Ila), (
10a) are formed symmetrically at equal intervals (or unequal intervals), and desired coupling unevenness parts (8a),
(7a), (lla), and (10a) have caulking protrusions (8b), (7b), and (1l b) on both sides (or one side).
), (10b) are formed. The coupling uneven portions (7a) and (8a) and (10a) and (lla) configured in this way are engaged with each other so that the lower surface, the upper surface, or both surfaces are the surface between the paths, and the crimping protrusion is Part (7b) and (8
b) and (10b) and (flb) are pressurized by caulking so that the protrusion for caulking becomes a surface between the concave and convex portion for connection, and the above-mentioned joint part is caulked to connect the two. be exposed. This caulking process prevents deformation in the planar direction, while pressurizing and deforming the joint surfaces in the direction in which they abut each other, resulting in strong caulking.

In Figure 1, the permanent magnet (9), rotor plate (8)
), the permanent magnet (9), the rotor plate (8), the sleeve (5), and the back yoke (
6) and the rotating portion of the rotating shaft (4) are rotated together, and during this rotational movement, vibration is generated by the above-mentioned vibration generating mechanism, which is extracted and used as output. The magnitude of the vibration can be arbitrarily set depending on the amount of eccentricity, the weight, and the amount of notch.

Effects of the Invention The vibrating flat brushless motor of the present invention can obtain desired vibrations depending on the application by applying the vibration generating mechanism shown in each of the above-mentioned embodiments, and is therefore particularly suitable as a thin vibration source. It is extremely effective.

[Brief explanation of drawings]

The drawings show an embodiment of the vibrating flat brushless motor of the present invention, FIG. 1 is a longitudinal sectional view of the vibrating flat brushless motor, FIGS. 2A to 5 are plan views of the vibration generating mechanism, and
Figure A is a plan view of a structure in which the permanent magnet and rotor plate are mounted eccentrically with respect to the rotating shaft. Figure 2B is a plan view of the structure in which the permanent magnet is mounted eccentrically with respect to the rotating shaft. Figure 2C is a plan view of a structure in which the rotor plate is mounted eccentrically with respect to the rotating shaft, and Figure 3A is a plan view of a structure in which one or more weights are mounted on the outer peripheral surface of a permanent magnet with respect to the rotating shaft. A plan view, FIG. 3B is an applied view of the same, FIG. 4 is a plan view of a structure in which a weight is attached to a part of the inner surface or a part of the outer peripheral surface of the rotor plate, and FIG. 5 is a part of the flat part of the permanent magnet. Figure 6 is an enlarged plan view of the joint between the case and the bearing housing.
FIG. 7 is an enlarged plan view of the joint between the rotor plate and the sleeve, FIGS. 8A to 8C are enlarged developed views showing the joint, the state of the joint, and the state after crimping, and FIGS. 9B is a cross-sectional view taken along line AA of FIG. 8B and line BB of FIG. 8C, and FIG. 10 is a view of the other side of FIG. 9A. (1)... Vibrating flat brushless motor (2)...
Bearing housing (3)... Bearing (4)... Rotating shaft (5)... Sleeve (6)... Back yoke (7)... (8)... (9)... (10)・・・Brim / rotor plate / permanent magnet / shank (11) ・ ・ ・ (12) ・ ・ ・ (!3) ・ ・ ・ ・ (14), (15) (7a), (8a) Case stator board coil and (16)... Weight, (10a) and (lla) (7b), (8b), (10b) and (llb)
... Uneven part for joining ... Protrusion for caulking

Claims (1)

[Scope of Claims] 1) In a brushless motor that generates rotational torque by a stator having a coil formed of a patterned conductor and a rotor having a permanent magnet, the rotor is configured to have an eccentric or eccentric center. A vibrating flat brushless motor characterized in that it is configured to generate vibrations due to the eccentricity or eccentric center of gravity of the rotor. 2) The vibrating flat brushless motor according to claim 1, wherein the magnets constituting the rotor are donut-shaped in plan view. 3) The vibrating flat brushless according to claim 1, wherein the eccentric or eccentric center structure of the rotor is such that the axial center of the rotor is eccentric with respect to the axial center of the rotating shaft. motor. 4) The vibrating brushless motor according to claim 1, wherein the eccentric or eccentric center structure of the rotor is such that the axis of the rotating shaft is eccentric with respect to the axis of the rotor. 5) The vibrating flat brushless motor according to claim 1, characterized in that a weight is attached to a part of the outer peripheral part or the flat part of the rotor. 6) A vibrating flat brushless motor, characterized in that a notch is formed in a part of the outer periphery or flat surface of the rotor.