JP2000013041A - Structure for preventing entry of water in electric device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent failures such as leak, etc., in an ultrasonic washer, etc. SOLUTION: A circuit board 13, etc., are housed in the inside of an ultrasonic washer body 1. A cover 19 is fitted to the lower part of the body 1 and a housing space 20 is formed between the body 1 and the cover 19. An inlet 21 is fitted to the cover 19. Then the inside of the body 1 communicates with the housing space 20, and a connecting hole 17 for providing a lead wire 22 connecting the circuit board 13 with the inlet 21 is made above the inlet 21. When a washing liquid is removed from a washing tank 6 by tilting the body 1, it often flows on the lower body 1 and enter the housing space 20 through a clearance between the inlet 21 and fitting hole 18. However, since the connection hole 17 is formed at higher position than the inlet 21, the washing liquid hardly enter the body 1 along the lead wire 22 and arrives at the circuit board 13. Further, this washer can be assembled easily only by passing the lead wire 22 through the connection hole 17, resulting in simplified structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing water from entering an electric appliance such as a cooking utensil such as an electric pot, an ultrasonic cleaner, and the like, which handles water and has a vertical direction in the apparatus.

[0002]

Conventionally, this kind of electric equipment has a structure as shown in FIG. 5, for example. In addition,
In this example, description will be made using an ultrasonic cleaning machine. This ultrasonic cleaning machine has an upper body 43 to which a cleaning tank 42 to which an ultrasonic vibrator 41 is attached is fixed, and a lower body 46 to which a connecting member 44 for connecting a power supply is fixed on a side surface and a circuit board 45 is attached inside. It is composed of The connection member 44 and the circuit board 45 are connected and wired by the lead wire 47. In such an ultrasonic cleaning machine, when the cleaning liquid in the cleaning tank is discarded after the cleaning is completed, the cleaning liquid flows down the outside of the upper body 43, and the cleaning liquid enters the ultrasonic cleaning machine from the mounting portion of the connection member 44. There was a risk of doing so. When the cleaning liquid is discarded, since the ultrasonic cleaning machine is inclined, the cleaning liquid may reach the circuit board 45 through, for example, the lead wire 47 for wiring, and may cause a failure such as an electric leakage. In order to prevent this, packing is usually provided between the connection member and the mounting portion, or the gap between the connection member and the mounting portion is sealed with a sealant, but both of these problems require assembly time. there were.

The present invention solves the above-mentioned problems, and provides a water intrusion prevention structure for electric equipment which not only has a simple structure and is easy to assemble but also does not reach water to electric parts such as a circuit board and can prevent failure. The purpose is to:

[0004]

According to a first aspect of the present invention, there is provided a water intrusion prevention structure for an electric device, the main body having an electric component such as a circuit board housed therein, and the main body attached to a lower portion of the main body. A cover that forms an accommodation space between the
An electrical connection member attached to the cover,
A connection hole for wiring connecting the inside of the main body and the housing space is formed above the connection member.

According to the present invention, as described above, even if water enters the accommodation space, the connection hole is located at a position higher than the connection member, and the connection member and the circuit board are passed through the connection hole. Are connected by a lead wire or the like, so that water does not reach the circuit board through the lead wire or the like.

According to a second aspect of the present invention, there is provided a water intrusion prevention structure for an electric device, wherein a main body accommodating an electric component such as a circuit board therein is mounted between the main body and a lower portion of the main body. A cover forming an accommodation space, and an electrical connection member attached to the cover, and a connection hole for wiring connecting the inside of the main body and the accommodation space is formed below the connection member; The connection hole is formed in a vertical hole in which the accommodation space side is downward.

According to the present invention, a connection hole is formed in the shape of a vertical hole with the accommodation space side downward even if water enters the accommodation space. Since the connecting member and the circuit board are connected by a lead wire or the like, the lead wire or the like has a lower accommodation space side, and therefore water does not reach the circuit board through the lead wire or the like.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. In this example,
Explanation will be made using an ultrasonic cleaning machine. 1 is an ultrasonic cleaning machine main body. The ultrasonic cleaning machine main body 1 includes an upper main body 2 and a lower main body 3.
And is constituted by. The upper body 2 is formed with a concave portion 4 having an open upper portion. In the concave portion 4, a cleaning tank 6 made of metal or the like having an ultrasonic vibrator 5 adhered to the bottom portion is disposed to melt the frame 7. The cleaning tank 6 is attached to the upper main body 2 by being fixed to the upper main body 2 by wearing or the like. A drain pipe 8 is formed at the bottom of the recess 4. The upper body 2 has a projection 9 having a substantially flat upper surface, and an operation unit 10 formed on the upper surface of the projection 9. A switch substrate 12 having an operation switch 11 is fixed below the operation unit 10 with screws or the like. A circuit board 13 as an electric component is fixed below the recess 4 with screws or the like. The circuit board 13 and the switch board 12 are connected by lead wires 14. Reference numeral 4A denotes a support rod integrally formed downward from the bottom surface of the recess 4, and the upper surface of the circuit board 13 is locked to the lower end of the support rod 4A and fixed by screws 4B. Then, these upper body 2, switch board 12, circuit board 13, lead wire
The lower main body 3 is attached below the upper main body 2 so as to cover 14. At this time, by connecting the drainage pipe 15 formed in the lower main body 3 to the drainage pipe 8, the recess 4 is communicated with the outside of the ultrasonic cleaning machine main body 1.

Further, the lower body 3 has an upper bottom surface portion 16A connected to the side surface of the lower body 3 so that the lower side portion of the lower body 3 is recessed in an inverted L-shape, and a side surface extending downward from the inside of the upper bottom surface portion 16A. Department
16B, there is formed a recess 16 consisting of a lower bottom surface 16C extending laterally inward from the lower end of the side surface portion 16B.
A vertical connection hole 17 opened downward is formed in the upper bottom surface portion 16A.
Are formed. A cover 19 having a side surface portion 19A and a bottom surface portion 19B and having a mounting hole 18 formed in the side surface portion 19A is formed below the concave portion 16 to form a housing space 20 and cover the connection hole 17. Have been. The mounting hole 18 is provided with an inlet 21 as an electrical connection member for connecting an external AC power supply.
The upper bottom surface 16A and the connection hole 17 are formed at a position higher than the inlet 21. The inlet 21 is connected to the lead wire 22 through the connection hole 17.
Is electrically connected to the circuit board 13. 23 is a rubber foot, 24 is a washing basket removably accommodated in the washing tank 6, and 25 is a lid for covering the washing tank 6.

Next, the operation of the above configuration will be described. When a cleaning liquid such as water and an object to be cleaned such as glasses are put into the cleaning tank 6 and the operation unit 10 is operated, the ultrasonic vibrator 5 starts ultrasonic vibration, and the vibration is transmitted from the cleaning tank 6 to the cleaning liquid. The object to be cleaned placed in the cleaning tank 6 is cleaned by the ultrasonic vibration, and the removed dirt diffuses into the cleaning liquid.
After the cleaning is completed, the cleaning liquid is discarded from the cleaning tank 6 by tilting the ultrasonic cleaning machine body 1. At this time, there is a possibility that the cleaning liquid transmitted through the lower main body 3 may enter the housing space 20 from a gap between the inlet 21 and the mounting hole 18, but the housing space 20 and the inside of the ultrasonic cleaner main body 1 are connected for wiring. The connecting hole 17 that communicates with the inlet
Since the cleaning liquid is formed at a position higher than 21, that is, the intermediate portion of the lead wire 22 is always located at a position higher than the inlet 21 by passing through the connection hole 17, the cleaning liquid is transmitted through the lead wire 22 and the ultrasonic cleaning machine And does not reach the circuit board 13.

As described above, in the above-described embodiment, the connection hole 17 for connecting the lead wire 22 for connecting the circuit board 13 and the inlet 21 while connecting the inside of the ultrasonic cleaner body 1 with the accommodation space 20 is provided. Since the cleaning liquid is disposed above the inlet 21 and the cleaning liquid is discarded from the cleaning tank 6 by tilting the ultrasonic cleaning device main body 1, the cleaning liquid transmitted through the lower main body 3 is supplied to the inlet 21.
There is a risk of intrusion into the housing space 20 from the gap between the housing hole 20 and the mounting hole 18. However, the connection hole 17 communicating the housing space 20 and the inside of the ultrasonic cleaner body 1 is formed at a position higher than the inlet 21. Therefore, the cleaning liquid does not penetrate into the ultrasonic cleaning device main body 1 along the lead wire 22 and does not reach the circuit board 13, thereby preventing a failure such as an electric leakage.

Further, when the cleaning liquid is discarded from the cleaning tank 6 by tilting the ultrasonic cleaning device main body 1 by merely passing the lead wire 22 through the connection hole 17, water does not reach the circuit board 13 through the lead wire 22. So simple structure and easy to assemble.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. An upper bottom surface portion 30A, a side surface portion 30B extending below the inside of the upper bottom surface portion 30A so as to recess the lower side surface of the lower body 3 in an inverted L-shape, and a lower side extending inward from the lower end of the side surface portion 30B. A concave portion 30 having a bottom surface portion 30C is formed, and a vertical hole-shaped connection hole 31 opened downward is formed in a lower bottom surface portion 30C of the concave portion 30. A cover 33 having a side surface portion 33A and a bottom surface portion 33B and having a mounting hole 32 formed in the side surface portion 33A is formed in the concave portion 30 so as to form an accommodation space 34 and cover the connection hole 31. I have. An inlet 35 serving as a connection member for connecting an external AC power supply is attached to the attachment hole 32.
The connection hole 31 formed in the lower bottom surface portion 30C has a short cylindrical shape and is formed at a position lower than the inlet 35. The inlet 35 is electrically connected to the circuit board 13 by the lead wire 36 through the connection hole 31.

Next, the operation of the above configuration will be described. When a cleaning liquid such as water and an object to be cleaned such as glasses are put into the cleaning tank 6 and the operation unit 10 is operated, the ultrasonic vibrator 5 starts ultrasonic vibration, and the vibration is transmitted from the cleaning tank 6 to the cleaning liquid. The object to be cleaned placed in the cleaning tank is cleaned by the ultrasonic vibration, and the removed dirt diffuses into the cleaning liquid. After the cleaning is completed, the cleaning liquid is discarded from the cleaning tank 6 by tilting the ultrasonic cleaning machine body 1. At this time, there is a possibility that the cleaning liquid transmitted through the lower main body 3 may enter the housing space 34 from the gap between the inlet 35 and the mounting hole 32. However, due to the wiring space
Since the connection hole 31 communicating between 34 and the inside of the ultrasonic cleaner body 1 is formed at a position lower than the inlet 35 and in the vertical direction, the lead wire 36 is lowest below the connection hole 31. Therefore, the cleaning liquid does not enter the ultrasonic cleaning device main body 1 along the lead wire 22 and does not reach the circuit board 13.

As described above, in the above embodiment, the inside of the ultrasonic cleaning machine main body 1 and the accommodation space 20 are connected and the circuit board 13 is connected.
Connection hole for lead wire 36 to connect the cable to the inlet 35
Since the connection hole 31 is formed below the inlet 35 and the connection hole 31 is formed as a vertical hole having the housing space 20 side lower, the lead wire 36 is the lowest below the connection hole 31. Since the cleaning liquid does not penetrate into the ultrasonic cleaning device main body 1 along the lead wires 36 and does not reach the circuit board 13, it is possible to prevent a failure such as an electric leakage.

Furthermore, when the cleaning liquid is discarded from the cleaning tank 6 by tilting the ultrasonic cleaning device main body 1 by merely passing the lead wire 36 through the connection hole 31, water may reach the circuit board 13 through the lead wire 36. Because it is not, it is easy to assemble with a simple structure.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made within the gist of the invention.
For example, in each of the above examples, the inlet is used as the connection member, but this may be a magnet plug or a plug-in type bushing. Further, a power cord bushing may be interposed between the lower body and the cover. Furthermore, although the present invention has been described using an ultrasonic cleaning machine, in other words, there is a possibility of getting wet with water or the like, and any other device having a vertical direction, such as an electric pot, a rice cooker, etc. May be applied.

[0018]

According to the first aspect of the present invention, there is provided a water intrusion prevention structure for an electric appliance, wherein a main body containing an electric component such as a circuit board is mounted between the main body and a lower part of the main body and between the main body. A cover forming an accommodation space, and an electrical connection member attached to the cover, wherein a connection hole for wiring connecting the inside of the main body and the accommodation space is formed above the connection member. Even if water transmitted along the main body invades from the connection member side, the water can be prevented from transmitting along the connection wiring to reach the electric components, preventing failure, and connecting the connection wiring to the connection hole. It is easy to assemble with a simple structure because it only needs to be passed.

According to a second aspect of the present invention, there is provided a water intrusion prevention structure for an electric appliance, wherein a housing space in which an electric component such as a circuit board is housed and a housing space attached to a lower portion of the main body and between the body. And a connection member attached to the cover, and a connection hole for wiring connecting the inside of the main body and the housing space is formed below the connection member, and the connection is formed. A hole is formed in a vertical hole with the housing space side facing down, so that even if water transmitted along the main body enters from the connection member side, the water is prevented from transmitting along the connection wiring to reach the electric components. In addition, failure can be prevented, and the connection wires need only be passed through the connection holes.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged view of the main part.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is an enlarged view of the main part.

FIG. 5 is a cross-sectional view of a conventional electric device.

[Explanation of symbols]

 1 Ultrasonic cleaner body (main body) 13 Circuit board (electric parts) 17 31 Connection hole 19 33 Cover 20 34 Housing space 21 35 Inlet (connection member) 22 36 Lead wire (connection wiring)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takashi Honda 3180, Yonenotsu, Oda, Yoshida-cho, Nishikanbara-gun, Niigata 24 F Twint Industrial Dormitory Room 203 F-term (reference) 4E360 BA03 BD02 ED28 GA29 GA33 GB71 GB99

Claims (2)

[Claims] 1. A main body in which an electric component such as a circuit board is housed, a cover attached to a lower portion of the main body and forming a housing space between the main body, and an electrical connection attached to the cover. And a connection hole for wiring connecting the inside of the main body and the housing space is formed above the connection member. 2. A main body in which an electric component such as a circuit board is housed, a cover attached to a lower portion of the main body and forming a housing space between the main body, and an electric connection attached to the cover. A connection hole for wiring connecting the inside of the main body and the housing space is formed below the connection member, and the connection hole is formed in a vertical hole in which the housing space side is downward. Water intrusion prevention structure for electrical equipment.