JPS6035144B2 - 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, lead wires with different electric resistances are wired inside the main body than the electric motor, each lead wire is connected to the switch part, and a contact terminal is provided for each lead wire, which is not exposed outside the main body. The electric 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 disposing the contact part of the switch device inside the cooking machine main body, and at the same time improves the operability (feel) of the operating knob exposed outside the main body. .

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, reference numeral 1 denotes an armature of an electric motor, which is held at both ends by bearings 3 and is attached to a lower main body 5 via a 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 ratchet of the armature 1, and rotates two gears 7 provided on the left and right sides.

Reference numeral 9 indicates a flywheel blade in which a shaft 10 is removably connected to a shaft portion 8 provided on a gear 7, and cooking such as whisking can be performed by rotating the pair of blades.

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.

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. Reference numeral 14 denotes a plate-shaped insulator in which notch holes 14a to 14d are formed corresponding to the speed control terminals 2a to 2d.
The connecting portion 15a of the operation knob 15, which is located between 3 and exposed to the outside of the main body 11, and the locking hole 14e of the insulator are iron-coupled 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. Further, an uneven portion 14f is formed in a part of the insulator 14, and a convex portion 20a of a spring portion 20 made of an insulating material is in elastic contact with a concave portion of the insulator 14 opposite to the uneven portion 14f. The spring member 20 is attached to the main body 11 with screws 21. 1
8 is a power cord, which is 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. 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. So the second
As shown in the figure, when the operation knob 15 is operated in the direction of the arrow,
It rotates around a center point 15b held by the metal fitting 16.

Therefore, the insulator 14 moves horizontally, and the convex portion 20a of the spring member 20 passes over the convex portion of the concavo-convex portion 14f provided on the insulator 14 and joins the next concave portion. At that time, the common terminal 2a remains in contact with the conductor 13, and the low-speed terminal 2b is located in the low-speed terminal hole 14b and comes into contact with the conductor 13, so that the terminals 2a and 2b shown in FIG. 4 are connected via the conductor 13. The motor rotates at low speed. Similarly to the above, when the knob 15 is further operated, the terminals 2a and 2c shown in FIG. Rotates at high speed (not shown). At this time, the convex portion 20a of the spring member 20 similarly passes over the convex portion of the concavo-convex portion 14f of the insulator 14 and engages in the next concave portion. 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 is easy to assemble.

In addition, by forming an uneven portion on the insulator and bringing the spring member into elastic contact with the uneven portion, the operation knob can be easily operated, and in particular, a quick feeling can be obtained when changing the speed, making it easy to use.

[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 motor in a low speed rotation state, Fig. 3 is a perspective view of the field part of the motor, and Fig. 4 is a circuit diagram of the electric motor, and FIG. 5 is a perspective view of an insulator. 2... Field part of the motor, 2a to 2d... Speed control terminal, 5, 11... Main body, 13... Conductor,
14...Insulator, 14a-14d...Notch hole, 14f...Irregularity, 15...Operation knob, 18...Power cord, 20... ...Spring member. 'Figure 2 Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. An electric motor having a speed control terminal formed in the main body and a conductor separate from the electric motor are provided, and an insulator having several notched holes is interposed between the speed control terminal and the conductor. The insulator is connected to the operating knob exposed outside the main body, and by operating the operating knob and moving the insulator, the speed control terminal is positioned in the notch in the insulator and comes into contact with the conductor, allowing the motor to operate. A switch device for an electric cooking machine that performs control and has an uneven portion formed on the insulator, and a spring member provided at a fixed position is brought into elastic contact with the uneven portion.