JPS61181416A - Electromotive cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an intermittent cooker for mainly cooking fruits, vegetables, etc.

Conventional technology In general, electric cookers use a reduction gear to reduce the rotational speed of the motor. (For example, a juicer rotates about 5 ooo) However, when a speed reduction device is used, the main body becomes very large.

Therefore, the present inventors have considered an electric cooker in which the rotation speed of the motor is controlled by an electronic circuit, and the motor and cutter are directly connected without a speed reduction device.

Hereinafter, such an electric cooker will be explained using a juicer as an example and with reference to the drawings.

As shown in FIG. 6, a motor 2 whose rotational speed is controlled by an electronic circuit section 7 is provided at the inner bottom of the main body 1. As shown in FIG.

A container 5 in which a spinner 6 is rotatably provided is placed on the top of the main body 1, and a drive shaft 3 of the motor 2 is connected to the spinner 6 via a coupling 4.

Problems to be Solved by the Invention However, with the above configuration, if the electronic circuit section 7 malfunctions or breaks down for some reason, the motor 2 will rotate at a high speed of about 15,000 rpm without being decelerated. There has been a problem in that the centrifugal force acting on the outer periphery of the cutter 6a and spinner 6 destroys parts such as the container 5 covering the upper part of the main body or the container lid 8.

Therefore, the present invention is designed to cut off the current and prevent the motor from rotating at high speed when the above-mentioned abnormality occurs.

Means for solving the problems and technical means of the present invention for solving the problems are:
A motor whose rotation speed is controlled by a control unit to rotate a cutter, a leaf spring fixed to the drive shaft in a direction non-perpendicular to the drive shaft of the motor, a blade portion provided on the leaf spring, and the motor. A side surface of the leaf spring opposite to the wire, the wire being provided within a locus of rotation of the blade portion of the leaf spring when the number of rotations exceeds a controlled rotation speed and connected in series with the winding of the motor. It is provided with a support part that comes into contact with.

action The effect of this technical means is as follows.

In other words, when the motor rotates normally and is normally controlled, the blade of the leaf spring will only slightly displace even when subjected to centrifugal force, but when the motor rotates at high speed, the blade of the leaf spring will displace centrifugally. Since the retaining portion that exerts the force is in contact with the leaf spring, it is possible to prevent the leaf spring from swinging due to rotation or stopping of the motor.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

2 in Figures 1 to 4, a container 22 and a container lid 23 on the top.
A motor 11 decelerated by an electronic circuit section 21 is held inside the main body 10 on which a motor 11 is mounted, and a spinner 14 is fitted onto a drive shaft 12 of the motor 11 via a coupling 13. Further, a plate spring 17 is provided on the drive shaft 12 protruding from the frame 15 at the bottom of the motor 11 with an insulating plate 16 interposed therebetween. This leaf spring 17 is curved in the opposite direction to the frame 15, and its tip is bent toward the frame 15 side to provide a blade portion 172L. Furthermore, a cooling fan 2o for the motor 11 is provided which is in contact with the lower surface of the leaf spring 17 and is fixed to the drive jaw 12, and applies a force to prevent the leaf spring 17 from swinging in the bending direction more than necessary. This is to prevent bending stress from being repeatedly applied to the wooden plate spring 1f when the motor 11 repeatedly rotates and stops, resulting in fatigue failure. Further, a non-conductor wire mounting plate 18 is installed on the lower surface of the frame 15 near the blade portion 17+L of the leaf spring 17, and a wire 19 that is electrically connected to the windings of the motor 11 is stretched on this plate. There is.

Next, the operation of the above configuration will be explained. When the motor 11 rotates, the drive shaft 12 rotates, the spinner 14 and the cutter provided at the bottom of the spinner 14 rotate, and the fruits and vegetables in the container 22 and container lid 23 are cut. At this time, the blade portion 17 & of the leaf spring 17 receives centrifugal force, and the frame 16
Displaced in the direction of. First, when the motor is rotating normally, there is only a small displacement and the wire 19 does not reach the tensioned position.

Next, when the electronic circuit section 21 etc. that controls the rotation speed malfunctions or breaks down, the motor 11 rotates at high speed and becomes dangerous, but the centrifugal force applied to the leaf spring 17 increases.
The curvature of the leaf spring 17 approaches a horizontal shape, and its blade portion 17a
cuts the wire 19. Therefore, the current flowing through the motor is cut off, and dangerous high-speed rotation can be prevented.

Furthermore, when the motor 11 is turned on and off, the leaf spring 17 receives a shock and tries to oscillate, but because it is in contact with the cooling fan 2o of the motor 11, it does not oscillate, which prevents fatigue failure of the leaf spring 17. This can be easily prevented by using the cooling fan 2o of the motor 11.

Although the cooling fan 20 of the motor 11 is used in the above embodiment, it goes without saying that a support section may be provided separately.

Effects of the Invention As is clear from the description of the above embodiments, the present invention fixes a leaf spring to the drive shaft of a motor, and utilizes the deformation of the leaf spring due to centrifugal force during abnormally high speed rotation to attach the motor to the windings. The wire that runs through the cotton is cut by the blade provided on the leaf spring, which cuts off the current when the motor rotates at abnormally high speeds, and prevents dangerous situations such as damage to parts during high-speed rotation. Moreover, the fatigue phenomenon that is applied to the leaf spring attachment part due to rotation and stoppage of the motor is also prevented by bringing the support part into contact with the leaf spring.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a main part of an electric cooker according to an embodiment of the present invention, Fig. 2 is a plan view of the same, and Fig. 3 is an enlarged cross-sectional view of a main part of the electric cooker showing the movement of a leaf spring. , FIG. 4 is a longitudinal sectional view of the electric cooking device, and FIG. 5 is a longitudinal sectional view of a conventional juicer. 11 ・Motor, 12... Drive shaft, 17...
Leaf spring, 17a...Blade part, 19...Wire, 2°-...Cooling fan. Name of agent: Patent attorney Toshio Nakao and 1 other person1'
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Claims (1)

[Claims] A motor that rotates a cutter with its rotation speed controlled by a controller, a leaf spring fixed to the drive shaft in a direction non-perpendicular to the drive shaft of the motor, a blade provided on the leaf spring, and the motor A wire is provided within the rotation locus of the blade portion of the leaf spring and connected in series with the winding of the motor, and the wire is connected to the opposite side of the leaf spring from the wire when the rotation speed exceeds a certain number of rotations. An electric cooker with a contacting support part.