JPS5946175B2 - 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, 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 part 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 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.

Speed control terminals 2a, 2b, 2c, and 2d made of spring material are 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 14a 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.

Speed control terminals 2a provided in the field portion 2 of the electric motor are common terminals, 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.

In the above device, the insulator 14 is supported by being sandwiched between a terminal provided on the motor and the conductor 13.

In addition, the spring pressure of the terminal is low so that the operation knob 15 can be operated smoothly, so if the product is dropped or otherwise used abnormally, the insulator 14 will move downward and the sixth As shown by the broken line in the figure, the operation knob 15 is disengaged from the connecting portion 15a, causing a problem in which the motor speed cannot be changed.

Therefore, as shown in FIG.
Let A be the fitting height of the connecting part 14e of the insulator 14 and the frame 2' to which the terminal of the field part 2 of the motor is attached and the insulator 14.
If B is the gap between the two parts, each part is arranged so that A>B.

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, 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.

As above, if you operate the operation knob 15 further, the fourth
Terminals 2a and 2c shown in the figure are connected through a conductor 13 and rotate at a medium speed (not shown), and terminals 2a and 2d are connected through a conductor 13 and rotate at a high speed (not shown).

Thus, the present invention forms a speed control terminal 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 operating knob and the insulator can be connected to each other. Since the mating height of the connecting part is set to be higher than the gap between the insulator and the upper end of the motor, it becomes a switch device for cooking machines that is highly safe, low resource, low cost, and easy to assemble. It is something.

[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 motor in a low-speed rotation state, FIG. 3 is a perspective view of the field part of the motor, and FIG. The figure is a circuit diagram of the electric motor, FIG. 5 is a perspective view of an insulator, and FIG. 6 is a sectional view showing the connection between the insulator and the operating knob. 2... Field part of the motor, 2a to 2d...
...Speed control terminal, 2'...Field part frame, 5
, 11... Main body of the hand mixer, 13...
...Conductor, 14...Insulator, 14a to 14d
...Notch hole, 14e...Connection part, 1
5...Operation knob, 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, the above-mentioned insulator is moved, and the speed control terminal is located in the cutout hole of the insulator, so that it comes into contact with the conductor, and the above-mentioned A switch device for an electric cooking machine in which the fitting height of the connection part between the operating knob and the insulator is set to be higher than the gap between the insulator and the upper end surface of the electric motor.