JP2002346290A - Washing machine lid open / close detector - Google Patents

Abstract

(57) [Problem] To provide an easy-to-handle and inexpensive lid opening / closing detection device for a lid opening / closing detection device of a washing machine for detecting an opening / closing state of a lid for opening / closing a clothes input section of the washing machine. SOLUTION: A hall IC 28 is mounted on a printed circuit board 29, and a magnet 30 is incorporated in a lid 13 for opening and closing the clothing input section 12, and a change in magnetism is detected by the hall IC 28 to detect opening and closing of the lid 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine lid opening / closing detecting device for detecting the opening / closing state of a lid for opening / closing a clothes input section of the washing machine.

[0002]

2. Description of the Related Art Hitherto, a lid opening / closing detecting device for a washing machine of this type has been configured as shown in FIGS. Hereinafter, the configuration will be described.

As shown in FIG. 8, an outer tub 1 includes a washing and dewatering tub 3 in which a stirring blade 2 is rotatably arranged at the bottom, and is suspended from a washing machine outer frame 5 by a hanging rod 4. . Motor 6
Drives the stirring blade 2 or the washing / dewatering tub 3 via the speed reduction mechanism / clutch 7. The drain valve 8 drains the washing water in the washing and dewatering tub 3, and the water supply valve 9 supplies water to the washing and dewatering tub 3.

A fluid balancer 10 for reducing vibration during dehydration is provided above the washing and dewatering tub 3, and an inner lid 11 is disposed above the washing and dehydrating tub 3. A lid 13 is provided in the clothes input section 12 on the upper surface of the washing machine main body so as to be freely opened and closed.

The control device 14 controls the operations of the motor 6, the drain valve 8, the water supply valve 9 and the like, and sequentially controls a series of steps of washing, rinsing, and dewatering, and is configured as shown in FIG. Control means 15 comprising a microcomputer
A load driving means 16 for controlling the motor 6, the drain valve 8, the water supply valve 9 and the like in accordance with a signal from the control means 15, a switch input means 18 comprising a key switch disposed in an operation panel 17, a light emitting diode, etc. And display means 19 comprising a display device.

The reed switch 20 connects a resistor 21 in series and connects to a DC power supply 22, and inputs a voltage at a connection point between the reed switch 20 and the resistor 21 to the control means 15.
The reed switch 20 is mounted on a printed circuit board 23 of the control device 14 as shown in FIG. 10, and the reed switch 20 is supported by a resin case 24 as shown in FIG. To be fixed.

A magnet 25 is mounted near the tip of the lid 13 and is disposed at a position facing the reed switch 20, and the contacts of the reed switch 20 are closed with the lid 13 closed. The control means 15 uses the reed switch 20
The opening and closing of the cover 13 is determined by the opening and closing of the contact.

The operation of the above configuration will be described.
After opening the laundry 3 and putting laundry and detergent into the washing and dewatering tub 3, closing the lid 13 and starting the operation, the water supply valve 9 is operated to supply water to the set water level in the washing and dewatering tub 3, and thereafter ,
By rotating and driving the stirring blade 2, a mechanical force is applied to the clothes to remove dirt. Even during rinsing, the washing and dewatering tub 3 is supplied with water to a set water level, and the stirring blade 2 is driven to rotate. Rinse clothing.

During dewatering, the drain valve 8 is driven to drain the water in the washing and dewatering tub 3, and then the motor 6 is driven to rotate the washing and dewatering tub 3 at a high speed to centrifugally dehydrate the laundry. I do. At this time, the lid 1 is used to check the condition of the laundry.
When the magnet 3 is opened, the magnet 25 is separated from the reed switch 20, so that the contact of the reed switch 20 is opened, and the control means 15 stops the motor 6, applies the brake built in the deceleration mechanism and the clutch 7, and performs the washing and cleaning. The dewatering tank 3 is stopped.

[0010]

In such a conventional configuration, since the reed switch 20 made of a glass tube is used, care must be taken to prevent damage to the switch.
For protection, a resin case 24 as shown in FIG.
However, there is a problem that the cost is high because the device is incorporated in the device.

An object of the present invention is to solve the above-mentioned conventional problems and to provide an inexpensive lid opening / closing detecting device which is easy to handle.

[0012]

According to the present invention, in order to achieve the above object, a semiconductor magnetic sensing element is mounted on a printed circuit board, a magnet is incorporated in a lid for opening and closing a clothing input section, and a magnetic field is detected by the semiconductor magnetic sensing element. The change is detected to detect the opening and closing of the lid.

With this arrangement, the opening and closing of the lid is detected by the resin-molded semiconductor magnetic detecting element, so that the handling is easy, and the mounting on the printed circuit board can be performed by a general-purpose automatic machine. it can.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a semiconductor magnetic sensing element mounted on a printed circuit board, and a magnet incorporated in a lid for opening and closing a garment charging section. The element detects a change in magnetism to detect the opening and closing of the lid, and the resin-molded semiconductor magnetic detecting element detects the opening and closing of the lid, so that handling is easy, and Since it can be mounted on a general-purpose automatic machine, it can be configured at low cost.

According to a second aspect of the present invention, in the first aspect of the present invention, a metal part constituting a magnetic circuit is mounted on a printed circuit board in proximity to the semiconductor magnetic sensing element. Metal parts mounted close to the element can increase the sensitivity of detecting magnets by the semiconductor magnetic sensing element, and reliably detect the opening and closing of the lid even with weak magnets or poorly sensitive semiconductor magnetic sensing elements. can do.

According to a third aspect of the present invention, in the first aspect of the present invention, an outer resin portion constituting the outside of the printed circuit board is provided, and a metal component constituting a magnetic circuit is attached to the outer resin portion. The metal part attached to the outer resin part can increase the sensitivity of detecting the magnet by the semiconductor magnetic sensing element, and the lid can be opened and closed by a magnet with weak magnetic force or a semiconductor magnetic sensing element with poor sensitivity. It can be detected reliably.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. Components having the same configuration as the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) As shown in FIG. 1, a control device 26 controls operations of a motor 6, a drain valve 8, a water supply valve 9 and the like, and sequentially controls a series of steps of washing, rinsing, and dewatering. As shown in FIG. 2, a control means 27 comprising a microcomputer is provided.
The output of a C (semiconductor magnetic sensing element) 28 is input.
The Hall IC 28 is mounted on a printed circuit board 29 of the control device 26, as shown in FIG.

A magnet 30 is mounted near the tip of the lid 13 that opens and closes the clothing input section 12, and is disposed at a position facing the Hall IC 28. The Hall IC 28 outputs a high signal when the lid 13 is closed. Is input to the control means 27, and when the lid 13 is opened and the magnet 30 is separated, a low signal is output to the control means 2
7 is input. The control means 27 determines opening and closing of the lid 13 based on the signal of the Hall IC 28.

The operation of the above configuration will be described.
After opening the laundry 3 and putting the laundry and detergent into the washing and dewatering tub 3, closing the lid 13 and starting the operation, the water supply valve 9 is operated to supply water to the set water level in the washing and dewatering tub 3, and thereafter ,
By rotating the stirring blade 2 to apply mechanical force to the clothes to remove dirt, and to supply water to the set water level in the washing and dewatering tub 3 even during rinsing, and to rotate the stirring blade 2. Rinse clothing.

During dehydration, the drain valve 8 is driven to drain the water in the washing and dewatering tub 3, and then the motor 6 is driven to rotate the washing and dewatering tub 3 at a high speed to centrifugally dehydrate the laundry. I do. At this time, the lid 1 is used to check the condition of the laundry.
When the motor 3 is opened, the magnet 30 is separated from the Hall IC 28, so that the output signal of the Hall IC 28 becomes low, and the control means 27 stops the motor 6, applies the brake built in the speed reduction mechanism and the clutch 7, and performs the washing and detachment. The water tank 3 is stopped.

Thus, the resin molded hole I
Since the change in magnetism is detected by C28 and the opening and closing of the lid 13 is detected, handling becomes easy, and
Since mounting on the printed circuit board 29 can also be performed by a general-purpose automatic machine,
It can be configured at low cost.

(Embodiment 2) As shown in FIG. 4, a metal component 31 is mounted on a printed circuit board 32 in close proximity to both sides of a Hall IC 28. As shown in FIG. It is configured in the shape of a letter, and forms a magnetic circuit of the magnet 30 attached near the tip of the lid 13. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The conventional reed switch uses a long lead to fix the reed switch at a position away from the printed circuit board and shorten the distance to the magnet.
The length 8a is short and it is difficult to approach the magnet 30.

For this reason, the metal component 31 is mounted on the printed circuit board 32 close to both sides of the Hall IC 28 and the magnet 30
By forming the magnetic circuit described above, the magnetic resistance of the magnetic circuit can be reduced, the sensitivity of detecting the magnet 30 by the Hall IC 28 can be increased, and an expensive material having a strong magnetic force can be used for the magnet 30 or the Hall IC 28 can be used. Thus, it is possible to reliably detect the opening and closing of the lid 13 without sorting out those having high magnetic detection sensitivity.

(Embodiment 3) As shown in FIG. 6, the operation panel 33 is an outer resin part which is made of resin and forms the outside of the printed circuit board 34. As shown in FIG. A metal component 35 having a substantially L-shape is attached, and the metal component 33 is provided close to both sides of the Hall IC 28 to form a magnetic circuit of the magnet 30 attached near the tip of the lid 13. Other configurations are the same as those in the first or second embodiment.

The operation of the above configuration will be described. By forming the magnetic circuit of the magnet 30 by the metal parts 35 attached to the operation panel 33, the magnetic resistance of the magnetic circuit can be reduced, and the sensitivity of detecting the magnet 30 by the Hall IC 28 can be increased. The opening and closing of the lid 13 can be reliably detected without using an expensive material having a strong magnetic force or selecting a Hall IC 28 having a high magnetic detection sensitivity.

[0028]

As described above, according to the first aspect of the present invention, there is provided a semiconductor magnetic sensing element mounted on a printed circuit board, and a magnet incorporated in a lid for opening and closing a clothing input section, Because the semiconductor magnetic sensing element detects the change in magnetism to detect the opening and closing of the lid, the resin-molded semiconductor magnetic sensing element detects the opening and closing of the lid, thereby facilitating handling. Since mounting on a printed circuit board can also be performed by a general-purpose automatic machine, it can be configured at low cost.

According to the second aspect of the present invention, the metal parts constituting the magnetic circuit are mounted on the printed circuit board in close proximity to the semiconductor magnetic sensing element. The sensitivity of detecting the magnet by the semiconductor magnetic sensing element can be increased by the component, and the opening and closing of the lid can be reliably detected even by a magnet having a weak magnetic force or a semiconductor magnetic sensing element having poor sensitivity.

According to the third aspect of the present invention, since the outer resin portion constituting the outer side of the printed circuit board is provided, and the metal component constituting the magnetic circuit is attached to the outer resin portion, the outer resin portion is attached to the outer resin portion. The sensitivity of detecting the magnet by the semiconductor magnetic sensing element can be increased by the metal part, and the opening and closing of the lid can be reliably detected even by a magnet having a weak magnetic force or a semiconductor magnetic sensing element having poor sensitivity.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a washing machine according to a first embodiment of the present invention.

FIG. 2 is a block circuit diagram of a control device of the washing machine.

FIG. 3 is an enlarged sectional view of a main part of the washing machine.

FIG. 4 is a sectional view of a main part of a washing machine according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a metal part of the washing machine.

FIG. 6 is a sectional view of a main part of a washing machine according to a third embodiment of the present invention.

FIG. 7 is a perspective view of a metal part of the washing machine.

FIG. 8 is a longitudinal sectional view of a conventional washing machine.

FIG. 9 is a block circuit diagram of a control device of the washing machine.

FIG. 10 is an enlarged sectional view of a main part of the washing machine.

FIG. 11 is an enlarged sectional view of a reed switch of the washing machine.

[Explanation of symbols]

 Reference Signs List 12 clothing input unit 13 lid 28 Hall IC (semiconductor magnetic sensing element) 29 printed circuit board 30 magnet

Claims (3)

[Claims] 1. A semiconductor magnetic sensing element mounted on a printed circuit board, and a magnet incorporated in a lid for opening and closing a clothing input unit, wherein the semiconductor magnetic sensing element detects a change in magnetism to open and close the lid. A lid opening / closing detection device for a washing machine that is adapted to detect. 2. A printed circuit board comprising metal parts constituting a magnetic circuit in proximity to a semiconductor magnetic sensing element.
A lid opening / closing detection device for a washing machine as described in the above. 3. The lid opening / closing detection device for a washing machine according to claim 1, further comprising an outer resin portion constituting an outer side of the printed circuit board, wherein a metal component constituting a magnetic circuit is attached to the outer resin portion.