JPH04187116A - Fan motor for cooker - Google Patents

Abstract

PURPOSE:To perform a function as a stopper for a fan when the fan is pushed in, by a method wherein the title fan motor is composed of a shaft inserted into a rotor, a bearing for rotatably holding the shaft, a stator for mounting the bearing, and the fan mounted on the shaft; and a tonguelike piece being in contact with the top end of the shaft is provided at the end face of the fan. CONSTITUTION:A cooker main body A is composed of a lower part main body 11, a protecting case 12, a heating coil 13, a protecting case cover 14, a control circuit board 15, a fan motor 16, etc.; and a cookpot 17 is removably held at the inside of the cooker main body A. The fan motor is composed of a shaft 19 inserted into a rotor 18, a bearing 20 for rotatably holding the shaft 19, a stator 21 for mounting the bearing 20, etc.; and a fan 22 is amounted on the shaft 19 by inserting. For the fan 22, a tonguelike piece 23 is provided at the end face thereof, and in the case where the fan 22 is put on the shaft 19, the fan 22 is designed so that the tonguelike piece 23 is in contact with the top end of the shaft 19 when the fan is pushed in to a proper position for the control circuit board 15 and the lower main body 11.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a fan motor for a cooking appliance.

Conventional technology In recent years, there has been increasing interest in the taste of rice in the rice cooker market, and for this reason, rice cookers that use electromagnetic induction heating to quickly cook rice at high heat, providing fluffy and delicious rice. can be seen. In this type of rice cooker, the higher the power, the higher the temperature of the heating peripheral parts, especially the switching elements that make up the inverter circuit that supplies high-frequency current to the heating coil. Air is taken inside to suppress the temperature rise of parts.

Hereinafter, the structure of the fan motor and the structure of peripheral parts will be explained with reference to FIGS. 6 and 7.

As shown in the figure, the cooker main body A includes a lower main body 1 and a protective frame 2.
It is composed of a heating coil 3, a protective frame cover 4, a control board 5, a fan motor 6, etc., and a pot 7 is removably housed inside. The fan motor 6 includes a shaft 9 inserted into a rotating body (hereinafter referred to as a rotor) 8, an E-ring 10 fitted to the shaft 9, a bearing 11 that rotatably holds the shaft 9, and a bearing 11.
A fan 13 is inserted into the shaft 9, and a fan spring 14 is press-fitted after installation. Further, an intake port (not shown) is provided on the lower surface of the lower body 1 corresponding to the fan motor 6.

The role of the E-ring 10 is provided as a stopper when the fan 13 is inserted to the proper position with respect to the control board 5 and the lower main body 1, not only during assembly but also when using the cooker. Safety is ensured even if the fan 13 is accidentally pushed from the intake port of the lower body 1 with a knife or the like. Furthermore, FIG. 8 shows another conventional example, in which the E-ring 10 is abolished and a D-cut portion 9' is added to the shaft 9'.
A is provided, and the insertion hole for the fan 13' is a D cut hole 13'a corresponding to the D cut, and the fan 13'
If the D cut part 9'a is pushed in beyond the proper position,
It played the role of a stopper.

Problems to be Solved by the Invention However, with such a conventional configuration of the fan motor 6,
In order to fit the ring 10 onto the shaft 9, a fitting groove must be provided in the shaft 9, and time and parts are required to attach the E-ring 10, which is a factor in increasing costs. In addition, other conventional examples can reduce component costs, but when inserting the fan (
Directionality (in the direction of rotation) occurs, which increases work time and increases the total cost.

The present invention solves the above problems, and aims to provide a fan motor that has a simple configuration, can reduce the number and required amount of parts, is inexpensive, and allows the fan to be safely fixed.

Means for Solving the Problems The first means for achieving the above object of the present invention is to provide a shaft that is inserted into a rotor, a bearing that rotatably holds the shaft,
It consists of a stator to which a bearing is attached, and a fan inserted to the shaft, and the end face of the fan is provided with a tongue piece that comes into contact with the tip of the shaft.

The second means includes a shaft inserted into the rotor, a bearing rotatably holding the shaft, a stator into which the bearing is inserted, a fan inserted into the shaft, and a fan crimped onto the fan. The fan spring has a spring shape, and the end surface of the fan spring is provided with a tongue piece that comes into contact with the tip of the shaft.

The third means includes a shaft inserted into the rotor, a bearing that rotatably holds the shaft, a stator to which the bearing is mounted, and a fan inserted into the shaft, and the end face of the fan is A rib or boss is provided that comes into contact with the bearing.

Operation According to the configuration of the first "means", the tongue provided on the fan is in contact with the shaft, so that when the fan is pushed in, it can function as a stopper.

Moreover, according to the second means, since the tongue piece of the fan spring crimped to the fan is in contact with the tip of the shaft, it can function as a stopper when the fan is pushed in.

Moreover, according to the third means, since the rib or boss provided on the end face of the fan is in contact with the bearing, it can function as a stopper when the fan is pushed in.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to FIGS. 1 to 4.

First, a first embodiment will be described with reference to FIGS. 1 and 2.

As shown in FIG. 2, the main body A of the cooker is composed of a lower main body 11, a protective frame 12, a heating coil 13, a protective frame cover 14, a control board 15, a fan motor 16, etc., and has a pot inside.
7 is housed in a detachable manner. Further, as shown in FIG. 1, the fan motor 16 has a shaft 1 inserted into the rotor 18.
9, a bearing 20 that rotatably holds the shaft 19, and a bearing 2.
The fan 22 is inserted into the shaft 19. The fan 22 is provided with a tongue piece 23 on its end surface, and when the fan 22 is inserted into the shaft 19 and pushed into the proper position relative to the control board 15 and the lower main body 11, the tongue piece 23 is attached to the tip of the shaft 19. It is designed so that it comes into contact with the Further, an intake port 24 is provided on the lower surface of the lower main body 11 corresponding to the fan motor 16 .

In the above configuration, the role of the fan motor will be briefly explained first.

Although high-frequency current is supplied to the heating coil 13 during rice cooking, the temperature of electronic components such as the switching element 15A disposed on the control board 15 that constitutes the inverter circuit is high.
For this reason, when cooking rice, the fan 22 is driven by the fan motor 16, and outside air is taken in through the intake port 24 provided on the lower surface of the lower main body 11, thereby suppressing the rise in temperature of the electronic components.

Next, assembly of the fan motor 16 will be explained.

When the fan 22 is inserted into the shaft 19, when the fan 22 is inserted to the proper position, the tongue piece 23 provided on the fan 22 is inserted into the shaft 19.
9 comes into contact with the tip and becomes a stopper. Therefore, there is an effect that the E-ring required in the conventional example can be made unnecessary.

Next, a second embodiment will be described with reference to FIG. 3. Note that only parts and configurations different from the first embodiment will be explained.

As shown in the figure, it is composed of a shaft 19 inserted into a rotor 18, a bearing 20 that rotatably holds the shaft 19, a stator 21 into which the bearing 20 is inserted, etc., and a fan spring 25 is attached to the shaft 19. The crimped fan 22 is inserted. The fan spring 25 is provided with a tongue piece 26 at one end thereof.
When inserting the fan 22 into the shaft 19, the shaft 19
It is designed so that the tongue piece 26 comes into contact with the tip.

According to the above configuration, when the fan 22 is inserted into the shaft 19, the tongue piece 26 of the fan spring 25 comes into contact with the tip of the shaft 19 when the fan 22 is in a proper position, and serves as a stopper. Therefore, there is an effect that the E-ring required in the conventional example can be made unnecessary.

Next, a third embodiment will be described with reference to FIGS. 4 and 5.

As shown in FIG. 4, it consists of a shaft 19 inserted into the rotor 18, a bearing 20 that rotatably holds the shaft 19, a stator 21 to which the bearing is mounted, and a fan 22 is inserted into the shaft 19. It will be worn. The fan 22 is provided with a boss 27 on its end surface, and when the fan 22 is inserted into the shaft 19, the control board 1
The boss 27 is designed so that the tip of the boss 27 comes into contact with the bearing 20 when pushed into the proper position relative to the lower body 11.

According to the above configuration, when the fan 22 is inserted into the shaft 19, the boss 27 comes into contact with the bearing 20 and serves as a stopper when the fan 22 is in a proper position. In addition, as shown in FIG.
6 is attached to the protective frame cover 14 with the fan 22 facing downward, and since the fan 22 is designed for intake, when the fan 22 rotates, the fan 22
An urging force F acts in a direction away from the bearing 20, so that there is no fear that the boss 27 will interfere with the bearing 20 during one rotation, and normal operation can be achieved. Moreover, since the stopper of the fan 22 is the bearing 20, no stress is applied to the shaft, which is relatively weak against stress, so that assembly can be carried out more safely.

Effects of the Invention As is clear from the description of the embodiments above, the present invention provides the following effects.

(1) A tongue piece is provided at one end of the fan that is inserted into the shaft,
By bringing this tongue piece into contact with the tip of the shaft, it can be used as a stopper when inserting the fan.

(2) A tongue piece is provided at one end of the fan spring that is crimped onto the fan that is inserted into the shaft, and by bringing this tongue piece into contact with the tip of the shaft, it can be used as a stopper when the fan is inserted.

(3) A boss is provided at one end of the fan that is inserted into the shaft, and by bringing this boss into contact with the bearing, it can be used as a stopper when the fan is inserted.

As described above, it is possible to provide a fan motor that has a simple configuration, can reduce the number and required amount of parts, is inexpensive, and allows the fan to be safely fixed.

[Brief explanation of drawings]

Fig. 1 is a side view of a fan motor of a cooking appliance showing one embodiment of the present invention, Fig. 2 is a partially cutaway side view of the same cooking appliance, and Figs. 3 and 4 are other embodiments of the invention. 5 is a cross-sectional view showing the fan motor installed, FIG. 6 is a partially cutaway side view of a conventional cooker, and FIGS. 7 and 8 are conventional fans. FIG. 3 is a side view of the motor. 18...Rotor, 19...Shaft, 20.
... Bearing, 21 ... Stator, 22 ...
...Fan, 23...Tongue piece, 25...
... Fan spring, 26 ... Tongue piece, 27.
·····boss. Name of agent: Patent attorney Haruaki Koebi and two others -11~18-m-Rotor j9- Axis 1 Figure 2a-@21--Stage22--77S23-<Fan's) Office Figure 3
Q'i'-7 hot 2.・Lip・tC--
-(FansbrindelidzT)FFigure 7N8 Figure

Claims (3)

[Claims] (1) Consisting of a shaft that is inserted into a rotating body, a bearing that rotatably holds the shaft, a main body that mounts the bearing, and a fan that is inserted into the shaft, and the end of the fan is connected to the A fan motor for a cooker that is provided with a tongue piece that comes into contact with the tip of the shaft. (2) Consisting of a shaft that is inserted into a rotating body, a bearing that rotatably holds the shaft, a main body that mounts the bearing, a fan that is inserted into the shaft, and a member that is crimped to the fan. . A fan motor for a cooking appliance, wherein an end surface of the fan spring is provided with a tongue piece that comes into contact with a tip end of the shaft. (3) Consists of a shaft that is inserted into a rotating body, a bearing that rotatably holds the shaft, a main body that mounts the bearing, and a fan that is inserted into the shaft. A fan motor for a cooking appliance comprising a rib or a boss that abuts the bearing.