JPS5946174B2 - Electric cooking machine switch device - Google Patents

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 hand 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, and a contact terminal is provided for each lead wire, which is 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.

Therefore, the present invention solves the above problems by arranging the switch section 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 hand 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 hand mixer having a handle 11', which is integrally attached to the main body 5 with screws 12.

A speed control terminal 2as2b+2c+2d made of a spring material is formed on the upper end surface of the field portion 2 of the electric motor, and a conductor 13 is fixed on the upper surface inside the main body 11 facing thereto.

Further, 14 is a plate-shaped insulator in which notch holes 143 to 14d are formed corresponding to the speed control terminals 2a to 2d, and 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 main body 11 and the locking hole 14e of the insulator are fitted and connected.

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, the cutout holes 14a formed in the insulator 14 are holes for common terminals, 14b are holes for low speed terminals, 14c are holes for medium speed terminals, 1
4d is a hole for a high-speed terminal, and there are slight protrusions 14a', 14 on the outer periphery of each hole on the sliding surface side that comes into contact with the conductor 13.
b'.

14c' and 14d' are formed.

This is because the insulator 14 is a flat plate, so if there is slight deformation such as warping or distortion, the conductor 13 and the insulator 14 will not slide over the entire surface, so each terminal 2a, 2b, 2c, 2d and the conductor 13 This is to prevent sparks from being generated during opening and closing, an oxide film from forming on the conductor surface, and poor contact between the terminal and the conductor.

The protrusions 14a' to 14d' on the outer periphery of the hole are always connected to the conductor 13.
Since the insulator 14 comes into contact with the surface, the oxide film on the conductor surface is peeled off every time the insulator 14 moves, and the contact portion with the terminals 2a to 2d always remains a clean surface.

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 = 2ct2
Since point d is insulated by the insulator 14 and not in contact with the conductor 13, 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 operating knob 15 is further operated, the terminals 2a and 2c shown in FIG. Rotates at high speed (not shown).

Thus, in the present invention, a speed control terminal is formed on the electric motor,
By interposing an insulator with a cutout hole between the conductor and connecting it to the operating knob, the contact part of the switch device can be located inside the main body, and the insulator can have a protrusion. Since the conductor is formed and the conductor is in contact, the switch device for the cooking machine has a simple structure, high safety, good contact, low resources, low cost, and easy assembly.

[Brief explanation of the drawing]

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 showing the electric motor in a low speed rotation state,
Figure 3 is a perspective view of the field part of the motor, Figure 4 is the circuit diagram of the motor, Figure 5 is a perspective view of the insulator, and Figure 6 is A of Figure 5.
-A sectional view. 1... Armature, 2... Field part of the motor, 2a to 2d... Speed control terminal, 5, 11.
...Main body, 13...Conductor, 14...
...Insulator, 14a-14d...Notch hole, 1
4a' to 14d'...Protrusions.

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 there are several notched holes between the speed control terminal and the conductor, and the outer periphery of the notched hole is rounded. An insulator with a protrusion formed on the contact surface with the conductor is interposed,
The insulator 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, causing the motor to move. A switch device for an electric cooking machine that controls the