JPS5946170B2 - Electric cooking machine switch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a simple configuration of a switch device for controlling the stopping, running, etc. of the electric motor in a cooking machine such as a band 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 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,
An abnormality such as poor insulation of the contact had occurred.

Furthermore, in order to prevent such abnormalities, a waterproof structure is required, which increases the cost of the switch section.

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

In the figure, 1 is the armature of the motor, with bearings 3 at both ends.
and is attached to the lower main body 5 via the motor frame 4.

Reference numeral 2 denotes a field part of the electric motor, which is attached to the main body 5 via the motor frame 4.

A worm gear 6 is formed at the tip of the armature shaft 1' and 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 band mixer having a handle 11', and 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.

Reference numeral 14 denotes a plate-shaped insulator having notched holes 14a to 14d corresponding to the speed control terminals 2a to 2d, which is located between the speed control terminals 2a, 2b, 2c, and 2d and the conductor 13, The connecting portion 15a of the operating knob 15 exposed to the outside of the operating knob 11 and the locking hole 14e of the insulator are fitted and connected.

A hook portion 15c 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 15 is held by a metal fitting 16, and the metal fitting 16 is fixed to the main body 11 with screws 17.

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.

Further, a notch 14a formed in the insulator 14 has a hole for a common terminal, 14b is a hole for a low speed terminal, 14c is a hole for a medium speed terminal, 1
4d 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 and 2c
, 2d are insulated by the insulator 14 and are 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, it rotates around the center point 15b held by the metal fitting 16.

As a result, the insulator 14 moves horizontally, the common terminal 2a remains in contact with the conductor 13, and the low-speed terminal 2b moves through the low-speed terminal hole 14.
It is at position b and comes into contact with the conductor 13.

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) 0 Here, if you operate the operating knob 15 in the opposite direction (arrow) to the operating direction (arrow) of the operating knob 15 in FIG. 6, the operating knob 15 will rotate as shown 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 15 along the direction of the broken line.

However, the action of the hook portion 15c of the connecting portion 15a 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 controlling the contact portion of the switch device on the main body. Since it can be located internally, the switch device of the cooking machine has a simple structure, is highly safe, uses low resources, is low cost, and has good assembly.

Further, by providing a hook portion at the connection portion of the operating knob, the reliability of the switch device is improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a hand mixer showing an embodiment of the present invention, FIG. 2 is a sectional view of the main parts of the electric motor in a low speed rotation state, and FIG. 3 is a perspective view of the field part of the electric motor. FIG. 4 is a circuit diagram of the electric motor, FIG. 5 is a perspective view of an insulator, and FIG. 6 is a partial cross-sectional view for explaining the operation of the connecting portion between the insulator and the operating knob. 2... Field part of the motor, 2a to 2d...
... Speed 1 Control element, 5, 11 ... Main body, 1
3...Conductor, 14...Insulator, 14a
~14d...Notch hole, 15...Operation knob, 15a...Connection part of operation knob, 15
b...Hook part, 18...Power cord.

Claims (1)

[Claims] 1. A motor with a speed control terminal formed in the main body and a conductor separate from the motor are provided, and an insulator having several notched holes is interposed between the speed control terminal and the conductor, and the The object is connected to an 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 to control 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.