JP2007147201A - Drive motor of automatic ice-making device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the cost of an automatic ice-making device, to improve end/start point detection accuracy related to an ice-making cycle, and to improve reliability. <P>SOLUTION: This drive motor is integrally provided with a lever fixed to the output shaft of the drive motor, a rollable end/start point detection signal generation means fixed in the vicinity of a tip of the lever, and a pair of end/start point signal detection means fixed to a surface of a housing on the output shaft side of the drive motor. The end/start point detection signal generation means comprises three permanent magnets tightly arranged in polarities of N-S-N in the rolling circumference direction of the lever; the end/start point signal detection means is a hall IC mounted on a printed wiring board; and a stopper is additionally arranged on a circular arc adjoining the end/start point signal detection means on the rolling plane of the lever as a forced stop means when trouble occurs in control by the end/start point signals related to the ice-making cycle. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drive motor used in an automatic ice making device.

  The need for cost reduction and functional improvement for automatic ice making equipment will not stop, and details will be omitted, but various improvements have been proposed as seen in the published literature, but the automatic ice making equipment will be completed. For the stand set maker, it was a reality that various improvements to the drive motor, which is a major component, are also in view.

  In addition, the control relating to the ice making operation of the automatic ice making device may be partly arranged on the ice making device main body side, and mechanical means such as a limit switch is used as the end point signal detecting means. there were.

  One of the problems is the elimination of alignment adjustment work such as a limit switch related to the repetition cycle of the ice making operation in the assembly process of each component of the automatic ice making device.

JP 2001-272146 A JP H04-060361 A

  As means for reducing costs and improving functions of an automatic ice making apparatus, rationalization leading to unitization of main components, improvement of starting point detection accuracy, and improvement of reliability have become important issues.

  The drive motor of the automatic ice making device according to the present invention realizes rationalization of handling by the drive motor itself, and a lever fixed to the output shaft of the drive motor and a roller fixed and rollable near the tip of the lever. A starting point detection signal generating means, and a pair of starting point signal detecting means fixed to the output shaft side casing surface of the drive motor, are integrally provided, and a rotating operation is a pair of starting point signal detecting means. It is configured to obtain and control an end point signal by separating from the start point detection signal generating means,

  The starting point detection signal generating means fixed to the lever is formed of three permanent magnets closely contacted with the polarity of N, S, N in the circumferential direction of the lever,

  A pair of starting point signal detection means is mounted on a printed wiring board in a predetermined arrangement, and is fixedly held by a drive motor via the printed wiring board, preferably

  Each of the paired starting point signal detection means is a Hall IC,

  A stopper is provided on the arc of the lever near the starting point signal detecting means on the turning surface of the lever as a forcible stopping means when the control by the starting point signal related to the ice making cycle occurs.

  The drive motor of the automatic ice making device according to the present invention can realize rationalization leading to unitization of main components and improvement of the starting point detection accuracy as means for cost reduction and function improvement of the automatic ice making device.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 are a front view and a side view of an embodiment of a motor in the apparatus of the present invention, wherein 1 is a motor, 2 is an output shaft, 3 is a substrate, 4 is a Hall IC of end point signal detection means, and 5 is Hall IC of start point signal detection means, 6 is a lever, 7 is a magnet, 8 is an end side stopper, and 9 is a start point side stopper.

  The motor 1 is turned on, the output shaft 2 is rotated, and the lever 6 is rotated between the start point hall IC 5 and the end point hall IC 4 by electrical control. Since the main component of the present invention is the drive motor, description of the control and configuration of the entire automatic ice making apparatus will be omitted.

  A lever 6 that extends in the radial direction is fixed to the output shaft 2 that constitutes the motor body, and a magnet 7 as an end point detection signal generating means is provided near the tip of the lever 6. An end point Hall IC 4 and a start point Hall IC 5 mounted on the printed circuit board 3 are provided so as to face the rolling arc surface of the magnet 7 that rotates together with the lever 6 that rotates together with the rotation of the motor. ing.

  Further, as means for preventing the rotation from continuing when an overrun occurs due to an error in detecting the signal for reaching the start point, an end point side stopper 8 and a start point side stopper 9 are provided in the vicinity of the outside of each of the start points. ing.

  FIG. 3 shows a state where the ice making is completed with the lever 6 attached to the output shaft 2 rotating, the end point hall IC 4 being ON, and the start point hall IC 5 being OFF.

  FIG. 4 shows a state in which ice making is started when the lever 6 attached to the output shaft 2 rotates, the start-point hall IC 5 is ON, and the end-point hall IC 4 is OFF.

  In the conventionally known one that uses a magnet as the starting point detection signal generating means, the magnet 7 is used as a single pole of either N or S.

  In the well-known configuration, the change in magnetic flux density with respect to the separation distance between the starting point hall IC4 and IC5 and the magnet 7 is a gentle curve as shown in FIG. 5, so that both the hall IC4 and IC5 have a predetermined magnetic flux density. Since it operates at a value, there is a drawback that the accuracy of the operation position is deteriorated.

  In order to improve the operation position accuracy, in the present invention, as shown in FIG. 6, three magnets are superposed of the N pole, the S pole, and the N pole.

  By using such a magnet, the change in magnetic flux density with respect to the separation distance between the end point Hall IC 4 and the start point Hall IC 5 becomes steep on both sides as shown in FIG. The Hall IC 4 and the start Hall IC 5 are activated, and the position detection accuracy is greatly improved.

  In addition, the sensitivity of the end point hall IC 4 and the start point hall IC 5 can be increased, and the operation can be controlled more accurately.

It is a front view of an example of a drive motor for an automatic ice making device according to the present invention. It is a side view of the example of FIG. It is an operation state explanatory view of the lever attached to the output shaft of the example of FIG. It is another operation state explanatory drawing of the lever attached to the output shaft of the example of FIG. It is explanatory drawing which shows the mode of the magnetic flux density between the starting point signal generation means Hall IC and the starting point signal acquisition means magnet of the example used as a prior art. It is explanatory drawing of the magnet of the Example shown in FIG. It is explanatory drawing which shows the mode of the magnetic flux density between the starting point signal production | generation means Hall IC and the starting point signal acquisition means magnet of the example which becomes this invention.

Explanation of symbols

1 Motor 2 Output shaft 3 Printed wiring board 4 End-point Hall IC
5 Start Hall IC
6 Lever 7 Magnet 8 End point stopper 9 Start point stopper

Claims (5)

It is installed in an automatic ice making device that is installed in a refrigerator or freezer and can perform ice making operations at an arbitrary cycle, and an end point detection signal generating unit related to the ice making cycle and a corresponding end point signal detecting unit are attached. In the drive motor,
A lever fixed to the output shaft of the drive motor, an end point detection signal generating means fixed near the tip of the lever and capable of rolling, and an end-to-end pairing fixed on the output shaft side housing surface of the drive motor A point signal detection means,
The automatic ice making is characterized in that the rotation operation of the drive motor is configured to be controlled by obtaining a start / end signal by connecting / disconnecting the start / end signal detection means and the start / end detection signal generating means which form a pair. Drive motor for the device.   The starting point detection signal generating means fixed to the lever is formed of three permanent magnets closely contacted with N, S, and N polarities in the circumferential direction of the lever. Item 2. A drive motor for an automatic ice making device according to item 1.   The end point signal detection means that forms the pair is mounted on a printed wiring board in a predetermined arrangement, and is fixedly held by a drive motor via the printed wiring board. Drive motor for automatic ice making machine.   The drive motor of the automatic ice making device according to any one of claims 1 to 3, wherein the starting point signal detecting means forming the pair are all Hall ICs.   As a forced stop means when a problem occurs in the control by the start point signal related to the ice making cycle, a stopper is provided on the arc around the start point signal detection means on the turning surface of the lever. The drive motor of the automatic ice making device according to any one of claims 1 to 4.

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