JPS5814695Y2 - electric appliances - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrical appliance with a motor, such as a mixer, which is equipped with a flat motor.

Figure 1 shows an example of a conventional electric appliance with an electric motor. In the figure, 1 is a flat electric motor, and the appliance main body 2 consists of a pair of upper and lower cases.
It is stored inside.

The electric motor 1 includes a flat armature 7 that supports a commutator 6 and the like within a motor frame 5 formed of a cylindrical yoke 3 with a bottom and another yoke 4 that closes the opening of the yoke 3. An even number of magnets 8 are attached to the yoke 4.

In an electric appliance having such a structure, the motor frame 5 occupies most of the inside of the appliance body 2, so a switch and other electrical parts for controlling the electric motor 1 are installed outside the motor frame 5.

Therefore, since the instrument main body 2 is formed with this space taken into consideration, the instrument main body 2 cannot be made smaller.

Further, the flat electric motor 1 is cooled by providing a ventilation hole 9 in the cylindrical portion of the yoke 3 facing the outer periphery of the armature 7, and by rotating the armature 7 and using a fan 11 attached to its rotating shaft 10.
The structure is such that air flows as shown by the arrows in FIG. 1.

However, by passing the cooling air through a limited portion of the motor frame 5, that is, through the ventilation holes 9, the air passage resistance is large, the cooling effect is poor, and wind noise is likely to occur.

Therefore, in order to supplement the cooling effect, the armature 7,
Since the magnet 8, yokes 3, 4, etc. are enlarged to increase the heat dissipation area, this is also a major factor preventing the device main body 2 from being made smaller.

Further, in the conventional structure, drawing is required to form the yoke 4 into a bottomed cylinder shape and to form the bearing mounting portion 12 on the yoke 3.

Therefore, processing and material costs are high, and in addition, the device body is large, making it difficult to manufacture at a low cost.

Therefore, an object of the present invention is to provide an electric appliance with a motor that can reduce the size of the appliance body and reduce manufacturing costs.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

21 in Figure 2 is a motor frame that also serves as the main body of the instrument.
This is formed from an upper frame 22 made of synthetic resin and a lower frame 23 made of synthetic resin.

The upper and lower base frames 22 and 23 have their open end surfaces engaged with each other to form the motor frame 21.

The upper frame 22 has a plurality of protrusions 24 and 25 integrally projecting inside thereof, and a bearing mounting part 26 is formed on the upper surface of the central part, and a passage is formed around the mounting part 26. A hole 22a is formed.

A pair of flat yokes 27 and 28 are housed within the motor frame 21 and spaced apart from each other.

That is, the upper yoke 27 is attached to the lower end of the protrusion 24, and the lower yoke 28 is attached to the lower end of the protrusion 25.

Furthermore, a flat armature 29 is housed within the motor frame 21 and is arranged between yokes 27 and 28.

The armature 29 includes a rotating shaft 30, a flat disk portion 32 supported by the rotating shaft 30 and having a winding 31, and a commutator 33 supported by the rotating shaft 30 and connected to the winding 31. It is formed from.

Note that power is supplied to the commutator 33 via a brush (not shown).

The rotating shaft 30 is supported by a bearing 34 attached to the bearing mounting portion 26 and a bearing 35 attached to the lower yoke 28.

Note that bearings 34 and 35 are iron-based sintered oil-impregnated bearings.
When the rotating shaft 30 is a magnetic path, the efficiency of the motor can be improved.

Further, the upper end portion of the rotating shaft 30 is projected outside the motor frame 21 and is connected to a coupling 36.

A fan 37 is integrally formed on the lower surface of the coupling 36.

Therefore, as the armature 29 and fan 37 rotate, cooling air flows as indicated by the arrow in FIG.

Further, as illustrated in FIG. 2, the yoke 28 has an even number of magnets 3 facing the flat disk portion 32 of the armature 29.
8 is attached, and a storage groove 39 is cut out from the periphery of the magnet 38, avoiding the magnet 38.

An electrical component 40 such as a switch is housed within the motor frame 21, and this component 40 is placed in the cutout groove 39.

In addition, 41 in FIG. 2 is a removable bolt, and a crushing blade 42 is rotatably attached to the bottom of the bolt, and a coupling 43 connected to this blade 42 is removably engaged with the coupling 36. It has become so.

Although the above-mentioned embodiment is constructed as described above, when implementing the present invention, the specific structure, shape, position, etc. of each component shall be changed from the above-mentioned embodiment unless it goes against the gist of the invention. It goes without saying that the present invention is not limited and can be implemented in various configurations.

Since the present invention described above has the configuration described in the claims of the above-mentioned utility model registration, it has the following effects.

Coupled with the fact that the motor frame also serves as the synthetic resin type device body, and the pair of yokes do not need to form the motor frame, there is no need to attach the bearing to the upper case and draw the bearing attachment part to the upper yoke. , and there is no need to draw the lower yoke.

Therefore, each yoke can be formed into a flat plate shape, and the molding process of each yoke is simple and the amount of materials used can be reduced, so that processing and material costs can be reduced.

Since each yoke has a flat plate shape, it is possible to improve the ventilation to the motor and improve the cooling effect.

Therefore, there is no need to increase the size of the armature, magnet, etc. to compensate for the cooling effect, and it is possible to reduce the size of the armature, etc. commensurate with the improvement of the cooling effect. Vibration can also be reduced.

A notch for storage was formed in one of the yokes to which the magnet was attached, and the electrical components were inserted into this groove, so it was necessary to secure a large amount of space outside the yoke to place the electrical components. do not have.

Therefore, in combination with the miniaturization of the armature and the like, it is possible to realize a miniaturization of the motor frame that also serves as the instrument body, and this is useful for reducing manufacturing costs.

Since the pair of yokes are flat, there are no obstructions in the air path near the outer periphery of the armature, and wind noise can therefore be prevented from occurring.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view showing a conventional example, FIG. 2 is a vertical side view showing an embodiment of the present invention, and FIG. 3 is a partial perspective view of the same embodiment. 21...Motor frame, 22...Upper frame, 23...Lower frame, 27,
28... Yoke, 29... Armature, 3
0...Rotating shaft, 34.35...Bearing,
37...Fan, 38...Magnet, 39...Storage notch groove, 41...Electrical component.

Claims (1)

[Scope of utility model registration request] It consists of an upper case and a lower case of synthetic resin type, which are provided by engaging each other's open end surfaces, and a motor frame which also serves as the main body of the instrument, and a pair of cases housed within the motor frame with a space between them. a flat yoke, a flat armature housed between the yokes in the motor frame, and an even number of magnets fixed to one of the yokes facing the armature; The upper case and the lower yoke are equipped with a bearing that supports the rotating shaft of the armature, and a notch for storage that is cut out from the periphery of one yoke to which the magnet is attached, avoiding the magnet. An electric appliance with an electric motor, comprising: and an electric component inserted into the notch groove and housed in the motor frame.