JPS5946171B2 - 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 stop and operation 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, in this structure, the contact portion of the switch device is exposed to the outside of the main body.

Since it must be placed near the control knob, if the control knob gets wet with liquid such as water, problems such as poor insulation of the contact points may occur.

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 contact portion 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.

6 is a worm gear formed at the tip of armature shaft 1';
The two gears 7 provided on the left and right sides are rotated.

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 2at2bt2c made of a spring material is provided on the upper end surface of the field portion 2 of the electric motor.

2d is formed, and a conductor 13 is fixed to 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, Operation knob 15 exposed to the outside of the main body 11
The connecting portion 15a and the locking hole 14e of the insulating portion 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 notch hole 14a formed in the insulator 14 is a hole for a common terminal, 14b is a hole for a low speed terminal, 14c is a hole for a medium speed terminal,
14d is a hole for a high-speed terminal, and the insulator portion that slides on each terminal when the operation knob 15 is operated is in each cutout hole 14a.
The thin-walled portion 14f continues from the portions 14d to 14d.

This is because when the terminals 2a, 2b, 2c, 2d and the conductor 13 are opened and closed, the thicker the insulator, the more impact the terminal has on the conductor when the terminal is located in the notch in the insulator. This is to prevent instantaneous chattering phenomenon at the contact portion, generation of sparks at the contact portion, and formation of an oxide film.

Further, the thin-walled portion 14f is designed to make it easier for the terminals 2a to 2d to ride on the insulator 14.

Here, if the insulator 14 is made thin overall, the insulator 14
Since the strength of the terminals 2a and 2b is lost.

2c, 2d, :! : Only the sliding portion is thin-walled, and the thickness of this thin-walled portion 14f is experimentally determined to be 0.3 to 1.5 mm from the viewpoint of strength and the state of spark at the contact portion.
0 mm is good.

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
Since point d is insulated by the insulator 14 and is 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).

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, so that the contact part of the switch device can be connected to the inside of the main body. Since the thin-walled part is formed on the insulating material, the switch device of the cooking machine has a simple structure, is highly safe, uses low resources, is low cost, is easy to assemble, and has no chattering. It is.

[Brief explanation of drawings]

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 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. 2... Field part of the motor, 2a to 2d...
... Speed control terminal, 5.11 ... Main body, 13.
...Conductor, 14...Insulator, 14a-1
4d...Notch hole, 14f...Thin shaped part, 15...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 the operating knob exposed on the outside of the main body, and by operating the operating knob, the above-mentioned insulator is moved, so that the speed control terminal is located in the cutout hole of the insulator and comes into contact with the conductor, and the motor is activated. A switch device for an electric cooking machine that performs control and has a thin-walled portion continuous to a notch hole formed in an insulating portion that slides with the speed control terminal.