JPS5899926A - Switch apparatus of electromotive cooking machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a switch device with a simple configuration for controlling the stopping, running, etc. of the electric motor in a cooking machine such as a kitchen mixer having an electric motor.

In conventional switch devices, several lead wires with different electrical resistances are wired from the motor inside the main body, each lead wire is connected to the switch part, each lead wire receives a contact terminal, and the lead wires are exposed outside the main body. The motor was controlled by opening and closing the contact terminals by operating the operating knob. However, with this type of structure, the contact part of the switch device must be placed near the operating knob exposed outside the main body, so if the operating knob gets wet with liquid such as water, there is a risk of poor insulation of the contact part, etc. An abnormality had occurred. Furthermore, in order to prevent such abnormalities, a waterproof structure is required, which increases the cost of the switch section.

Therefore, the present invention solves the above problems by arranging the contacts of the switch device inside the main body of the cooking machine.One embodiment of the present invention will be described below with reference to the drawings, taking an example of a kitchen mixer.

In the figure, 1 is the armature of the motor, with bearings 3 at both ends.
and is attached to the lower body 6 via the motor frame 4. Reference numeral 2 denotes a field part of the electric motor, which is attached to the main body 6 via the motor frame 4. Reference numeral 6 denotes a worm gear formed at the tip of the armature shaft 1', which rotates two gears 7 provided on the left and right sides. Reference numeral 9 denotes a stirring blade in which a shaft 10 is removably fitted into a shaft portion 8 provided on a gear 7. By rotating the pair of stirring blades, cooking such as whisking can be performed. Reference numeral 11 designates an upper main body of the hand mixer having a handle 11', which is integrally attached to the main body 5 with screws 12.

On the upper end surface of the field portion 2 of the electric motor, speed control terminals 2a, 2b, 2c made of spring material are provided.

2d is formed, and a conductor 13 is fixed to the upper surface inside the main body 11 facing thereto. 14 is the speed control terminal 2
The speed control terminals 2a, 2b, 20,
2d and the conductor 13, and the connecting portion 15a of the operation knob 16 exposed to the outside of the main body 11 and the locking hole 1 of the insulator.
4e are fitted and connected. A hook portion 16c is formed at the tip of the connecting portion 15a to prevent disconnection from the locking hole 14e of the insulator 14. The operating knob 16 is held by a metal fitting 16, and the metal fitting 16 is attached to the main body 11 with a screw 17.
It is fixedly offset. 18 is a power cord connected to the electric motor section. A brush spring 19 is held in the field part 2 of the electric motor.

A speed control terminal 2a provided in the field portion 2 of the electric motor is a common terminal, 2b is a low speed terminal, 2C is a medium speed terminal, and 2d is a high speed terminal. In addition, a notch 14a formed in the insulator 14
14b is a hole for a common terminal, 14C is a hole for a medium speed terminal, and 14d is a hole for a high speed terminal.

Next, the operation of the switch device and its operation will be explained.

In FIG. 1, the common terminal 2a is located in the common terminal hole 14a,
Although it is in contact with the conductor 13, other terminals 2b, 2c, 2
d is insulated by the insulator 14 and is not in contact with the conductor 13, so the motor is in a stopped state.

Therefore, as shown in FIG. 2, when the operating knob 15 is operated in the direction of the arrow, the hook rotates around the center point 15b held by the metal fitting 16. Therefore, the insulator 14 moves horizontally, the common terminal 2a comes into contact with the IT conductor 13, and the low speed terminal 2b comes into contact with the conductor 13 at the position of the low speed terminal hole 14b.

That is, the terminals 2a and 2b shown in FIG. 4 are connected via the conductor 13, and the motor rotates at a low speed.

Similarly to the above, when the operation knob 15 is further operated, the terminals 2a and 2C shown in FIG. Rotates at high speed (not shown).

Here, if the operation knob 16 is operated in the opposite direction (arrow) to the operation direction (arrow) of the operation knob 16 in FIG.
As the insulator 14 rotates, a force in the F direction is applied to the insulator 14 due to the force distribution, and the insulator 14 tries to detach from the connecting portion 15a of the operating knob 16 along the direction of the broken line. However, the action of the hook portion 160 of the connecting portion 16a prevents it from coming off, allowing reliable operation.゛In this way, the present invention forms a speed control terminal on the electric motor, interposes an insulator with a cutout hole between it and the conductor, and connects this with the operation knob, thereby connecting the contact portion of the switch device to the main body. It is not possible to make the position 14 inside the
It is a switch device for cooking machines that has a simple configuration, is highly safe, uses low resources, is low cost, and has good assembly.1.
Further, by providing a hook portion at the connection portion of the operating lever, the reliability of the switch device is improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a hand mixer showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of the main parts showing the low speed rotation state of the electric motor, FIG. 3 is a perspective view of the field part of the electric motor, and FIG. 6 is a perspective view of an insulator, and FIG. 6 is a partial cross-sectional view for explaining the operation of a connecting portion between an insulator and an operating lever. 2... Field part of the electric motor, 2a to 2d...
Speed control element, 5.11...Main body, 13...
...Conductor, 14...Insulator, 14a to 14d
...Notch hole, 16...Operation knob, 1
6a...Connection part of operation knob, 16b...Hook part, 18...Power cord. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 2C Figure 5 Figure 6

Claims (1)

[Claims] A motor having a speed control terminal formed therein and a conductor separate from the motor are provided, an insulator having several notched holes is interposed between the speed control terminal and the conductor, and the insulator is is connected to the operating knob exposed on the outside of the main body, and by operating the operating knob and moving the insulator, the speed control terminal is positioned in the cutout hole of the insulator and comes into contact with the conductor, thereby controlling the motor. A switch device for an electric cooking machine, wherein a hook portion is provided at a connection portion of the operating knob with an insulator.