WO2019069461A1

WO2019069461A1 - Dust removal mechanism, electronic device, and method for manufacturing electronic device

Info

Publication number: WO2019069461A1
Application number: PCT/JP2017/036515
Authority: WO
Inventors: 高久山田; 義信守谷
Original assignee: Ｎｅｃディスプレイソリューションズ株式会社
Priority date: 2017-10-06
Filing date: 2017-10-06
Publication date: 2019-04-11

Abstract

Provided are: a dust removal mechanism with which it is possible to introduce sufficient outside air and maintain, over a long period, an effect of capturing dust entering with the outside air, the dust removal mechanism having a simple configuration and a low manufacturing cost; an electronic device equipped with the dust removal mechanism; and a method for manufacturing the electronic device. The present invention has dust-capturing members 4 that cover air intake ports 3 provided to a casing 2 of an electronic device 1. The dust-capturing members 4 are provided with ventilation holes 4a and are water-repellent and/or oil-repellent.

Description

Dust removal mechanism and method of manufacturing electronic device and electronic device

The present invention relates to a dust removing mechanism, an electronic device including the same, and a method of manufacturing the electronic device.

For example, in an electronic device including a display device such as a projector, there is a device which introduces outside air into the device to cool the inside of the device in order to prevent overheating of a built-in electronic component. In such a device, an opening (intake port) is provided in a housing in order to introduce outside air into the device. However, air intakes that can sufficiently introduce outside air are safety standards for various devices (for example, IEC 60950 (information technology device), IEC 60065 (audio, video and similar electronic devices), IEC 60101, which are standards of the International Electrotechnical Commission. (Medical electrical equipment), IEC 62368 (audio, video, information and communication technology equipment), etc.) may not meet the conditions of the opening specified. Therefore, a metal mesh or a metal plate with an open hole may be disposed at a position inside the housing and facing the air inlet. The shape of the wire mesh or the perforated metal plate is also defined in the above-mentioned safety standard. Specifically, the wire diameter and pitch of the wire mesh, the thickness of the metal plate and the shape and pitch of the holes are defined in the safety standard. In order to comply with these safety standards, the shape of the wire mesh or metal plate can not be arbitrarily changed.

When external air is introduced into the apparatus from the air intake, dust may be taken in with the external air and may adhere to parts in the apparatus. In particular, when dust adheres to the image display element, the light source and the optical component, the image quality is significantly degraded. Therefore, in the invention described in Patent Document 1, in order to suppress adhesion of dust taken in simultaneously with the outside air for cooling to various parts in the apparatus, the dust is trapped at a position inside the air intake port in the apparatus. An apparatus is provided. This dust capture device has a roll-shaped electrostatic filter wound around two winding shafts, and a brush in contact with the filter surface of the electrostatic filter. According to this configuration, since the electrostatic filter captures dust that has entered from the air inlet, adhesion of dust to various parts in the device can be suppressed.

Unexamined-Japanese-Patent No. 2010-119941

If a large amount of dust adheres to the electrostatic filter of the dust capture device, the air permeability will deteriorate and it will be difficult to take in the outside air for cooling, or the adsorption effect by static electricity will be reduced and the dust removal function will be degraded. Do. In the dust capture device described in Patent Document 1, the take-up shaft is rotated to sequentially take up the roll-shaped electrostatic filter, and the unused portion of the electrostatic filter is disposed to face the air inlet. There is. As a result, dust removal over a long period of time is possible. However, for that purpose, a winding shaft for winding the filter and a motor for driving the same are required. Furthermore, in order to determine the timing of winding, many parts such as a timer for measuring the accumulated use time of the dust capture unit and an air volume sensor for detecting air permeability (clogging condition) are required, and the configuration is complicated. Production cost is high.

In addition, as described above, in the configuration in which a metal mesh or a metal plate with a hole is disposed at the air intake, dust enters the mesh of the metal mesh or the hole of the metal plate due to long-term use, causing clogging and air permeability. May decrease. As a result, the outside air can not be introduced to sufficiently cool the inside of the device, and the temperature inside the device may abnormally rise and the device may not operate safely (first problem). On the other hand, in order to sufficiently cool the inside of the device, the capacity of the outside air suction means is improved to increase the amount of outside air taken into the device from the air inlet (for example, the number of revolutions of the suction fan). Need to raise). As a result, problems such as increase in noise (second problem) and increase in power consumption (third problem) occur.

Therefore, the object of the present invention is to solve the above-mentioned problems, to be able to introduce sufficient outside air, and to maintain the effect of capturing dust entering with the outside air over a long period of time, having a simple structure and manufacturing cost And providing an electronic device equipped with the same and a method of manufacturing the electronic device.

The dust removing mechanism of the present invention has a dust capturing member covering an air inlet provided in a housing of an electronic device, and the dust capturing member includes a vent and is either water-repellent or oil-repellent. It has one or both.
The method for manufacturing an electronic device according to the present invention comprises the steps of applying a treatment for imparting one or both of water repellency and oil repellency to a dust capturing member provided with a vent, and a casing of the electronic device. Disposing the dust capture member inside the housing so as to cover the provided air intake from the inside of the housing.

According to the dust removal mechanism of the present invention and the method of manufacturing the electronic device and the electronic device, sufficient external air can be introduced, and the effect of capturing dust entering with the external air can be maintained over a long period of time, and the structure is simple. Low cost of production.

It is sectional drawing of the principal part of the electronic device containing the dust removal mechanism of the 1st Embodiment of this invention. It is a front view of the electronic device containing the dust removal mechanism of the 2nd Embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is a perspective view of the reticulated member which is a dust capture member of the dust removal mechanism shown in FIGS. It is a front view of the electronic device containing the dust removal mechanism of the 3rd Embodiment of this invention. FIG. 6 is a cross-sectional view taken along line AA of FIG. 5; It is a perspective view of the reticulated member which is a dust capture member of the dust removal mechanism shown in FIGS. It is a front view of the electronic device containing the dust removal mechanism of the 4th Embodiment of this invention. FIG. 9 is a cross-sectional view taken along line AA of FIG. 8; It is a perspective view of the plate-shaped member which is a dust capture member of the dust removal mechanism shown to FIG. It is a front view of the electronic device containing the dust removal mechanism of the 5th Embodiment of this invention. FIG. 12 is a cross-sectional view taken along the line AA of FIG. It is a perspective view of the projector which is an example of the electronic equipment containing the dust removal mechanism of the present invention. It is a rear perspective view of the monitor which is another example of the electronic device containing the dust removal mechanism of this invention.

Hereinafter, embodiments of the present invention will be described.
The dust removal mechanism of the first embodiment of the present invention is schematically shown in FIG. The dust removal mechanism is, for example, in the housing 2 so as to face the air inlet 3 provided in the housing 2 of a device (electronic device) 1 such as a display device and to cover the air inlet 3 from the inside of the housing 2. It is located inside. The dust removal mechanism of the present invention comprises a dust capture member 10 having a vent 10a. The dust capture member 10 has one or both of water repellency and oil repellency.

In the apparatus 1 provided with the dust removal mechanism, the outside air taken in from the air inlet 3 formed in the housing 2 enters the inside of the housing 2 through the vent hole portion 10a of the dust capturing member 10, Cool various parts to prevent overheating. At this time, the dust that has entered from the air inlet 3 together with the outside air is captured by the dust capturing member 10. However, since the dust capture member 10 has one or both of water repellency and oil repellency, the dust captured by the dust capture member 10 does not strongly adhere to the dust capture member 10 and thus falls. easy. Therefore, it is difficult for the dust to be held in a state in which the vent hole portion 10a of the dust capturing member 10 is closed, and clogging of the vent hole portion 10a is unlikely to occur. Since the dropped dust remains in the vicinity of the dust capturing member 10, it does not reach and adhere to various parts located inside the apparatus. That is, in the present embodiment, the inside of the housing 2 can be sufficiently cooled using the outside air taken in from the air inlet 3. Then, the dust which has entered from the air inlet 3 together with the outside air can be captured by the dust capturing member 10, and the dust can be prevented from adhering to various parts inside the housing 2 to cause a problem. Furthermore, since the dust captured by the dust capturing member 10 is easily dropped, it is possible to prevent the clogging of the vent 10a by continuing to close the vent 10a.

In the method of manufacturing the device 1 (electronic device), the dust capturing member 10 provided with the vent hole portion 10a is subjected to a process for providing one or both of water repellency and oil repellency, and a case And disposing the dust capture member 10 inside the housing 3 so as to cover the air intake 3 provided in the housing 2 from the inside of the housing 2.

FIG. 2 is a front view of an apparatus including a dust removing mechanism according to a second embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line AA of FIG. And the front view of the reticulated member which is a dust capture member of the dust removal mechanism in FIG. 4 is shown. The dust removing mechanism of the present embodiment has the same configuration as the dust removing mechanism of the first embodiment, and a metal mesh member (wire mesh 4) shown in FIGS. 2 to 4 is used as an example of the dust capturing member. There is. The wire mesh 4 has a mesh 4a as a vent, and has a shape and a dimension (wire diameter, pitch, etc.) defined in public safety standards (eg, IEC 60950, IEC 60065, IEC 60101, IEC 623678, etc.) ing. The metal mesh 4 is nano-embossed to form fine irregularities on the surface of the metal mesh 4. Thus, the wire mesh 4 of the present embodiment has water repellency and waste oil.

As in the first embodiment, in the apparatus provided with the dust removal mechanism of the present embodiment, the outside air taken in from the air inlet 3 formed in the housing 2 and passed through the mesh 4 a of the wire mesh 4 is the housing 2 Cool the inside of the At this time, the dust entering from the air inlet 3 together with the outside air is captured by the wire mesh 4. Since the metal mesh 4 is nano-embossed to impart water repellency and oil repellency based on the Lotus effect, the dust trapped on the metal mesh 4 immediately falls and clogging of the mesh 4 a is suppressed. The dust does not fall in the vicinity of the wire mesh 4 and does not enter the inner part of the device 1 and adhesion of the dust to various parts can be suppressed. As a result, it is possible to suppress the safety of the device 1 due to overheating inside the device 1. As a result, it is not necessary to increase the output of a device (for example, a fan) for taking outside air into the device 1 from the intake port 3, and noise and power consumption can be suppressed low. In addition, security can be maintained by designing the wire mesh 4 to meet, for example, the official safety standards defined by the International Electrotechnical Commission.

In the above-described configuration, the metal mesh 4 is nano-embossed to impart water repellency and oil repellency, but the configuration is not limited thereto. As a modified example of the present embodiment, instead of the metal mesh 4 being nano-embossed, a fluorine coating (fluororesin coating) may be applied to impart water repellency and oil repellency. Also in this modification, as in the above-described example, cooling of the inside of the housing 2 using external air, trapping of dust using the wire mesh 4, and clogging of the wire mesh 4 as a water repellency and oil repellency effect The suppression is realized.

Thus, the treatment method for imparting water repellency and oil repellency to the wire mesh 4 is not limited. Although water repellency and oil repellency are imparted to the wire mesh 4 in the example described above, only one of water repellency and oil repellency may be imparted. According to the above-described nano-embossing process, the fine unevenness formed on the surface of the wire mesh 4 produces a lotus effect to obtain water repellency and oil repellency. However, by changing the size of the asperities and adjusting the contact angle to water droplets and the contact angle to oil droplets, it is also possible to have only water repellency or to have only oil repellency. . In addition, fine irregularities may be formed on the surface of the wire mesh 4 by a processing method different from nano-emboss processing to impart one or both of water repellency and oil repellency. On the other hand, in the case of the fluorine coating, depending on the specific composition of the fluorine resin to be coated, the case where water repellency is imparted, the case where oil repellency is imparted, and both water repellency and oil repellency are imparted. May be In addition, it is also possible to impart water repellency to the wire mesh by using a coating agent that may impart water repellency but not oil repellency, such as a coating agent made of wax. Conversely, oil repellency can be imparted to the wire mesh by using a coating agent that imparts oil repellency but does not impart water repellency. Furthermore, multiple different processes can be applied to the wire mesh to impart either water repellency or oil repellency or both. As described above, the processing method may be appropriately determined in consideration of which of the water repellency and the oil repellency is required depending on the use of the apparatus, the installation environment, and the like. In any case, dust captured together with the external air for cooling inside the device can be captured by the wire mesh 4, and the captured dust can be easily dropped to suppress the occurrence of clogging.

FIG. 5 is a front view of an apparatus including a dust removing mechanism according to a third embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along the line AA of FIG. And the front view of the reticulated member which is a dust capture member of the dust removal mechanism in FIG. 7 is shown. In the dust removing mechanism of the present embodiment, a vibrating body 5 for vibrating at least a part of the wire mesh 4 is attached to the wire mesh 4. The vibrating body 5 is composed of a piezoelectric element, a fan and the like, and vibrates to vibrate the wire mesh 4 when driven. When the wire mesh 4 vibrates with the vibration of the vibrating body 5, the dust captured by the wire mesh 4 falls. That is, in this embodiment, in addition to the water repellency and oil repellency of the wire mesh 4, the dust captured in the wire mesh 4 is more surely and easily dropped by the vibration of the wire mesh 4 accompanying the vibration of the vibrating body 5. This means that the dust is held in a state of closing the mesh 4a of the wire mesh 4, that is, the clogging of the mesh 4a can be prevented more reliably, and the reliability that can maintain the introduction of sufficient external air for a long period is high.

In the second to third embodiments described above, the wire mesh 4 is used as an example of the dust capturing member, but the invention is not limited thereto. In the fourth embodiment of the present invention shown in FIGS. 8 to 10, a metal plate member (metal plate 6) is used as the dust capture member. FIG. 8 is a front view of an apparatus including a dust removing mechanism according to a fourth embodiment of the present invention, and FIG. 9 is a cross-sectional view taken along line AA of FIG. And the front view of the plate-shaped member which is a dust capture member of the dust removal mechanism in FIG. 10 is shown. The metal plate 6 of the present embodiment has a through hole 6a as a vent hole portion, and the shape and dimensions (for example, of the metal plate 6) defined in public safety standards (for example, IEC 60950, IEC 60065, IEC 60101, IEC 623678). The thickness, the shape and the pitch of the through holes 6a, etc. are provided. And, as in the metal wire mesh 4 of the second to third embodiments, the metal plate 6 of the present embodiment has one or both of water repellency and oil repellency. As described above, the method for imparting water repellency and oil repellency to the metal plate 6 is not particularly limited, and processing (for example, nano-emboss processing etc.) for forming fine irregularities on the surface, and surface coating (for example, fluorine coating) It can be performed. The manufacturer of the device 1 may appropriately determine the selection of the method for imparting water repellency and oil repellency, and the necessity of each of the water repellency and oil repellency. Furthermore, in the present embodiment, the vibrator 5 is attached to the metal plate 6 as in the third embodiment. However, it is also possible to adopt a configuration in which the vibrator 5 is not attached to the metal plate 6.
Also in the dust removing mechanism of the present embodiment, as in the second to third embodiments, cooling of the inside of the housing 2 using the open air, trapping of dust using the metal plate 6, water repellency and oil repellency The suppression of the clogging of the metal plate 6 using the effect and the vibration by the vibrating body 5 is realized.

FIG. 11 is a front view of an apparatus including a dust removing mechanism according to a fifth embodiment of the present invention, and FIG. 12 is a cross-sectional view taken along line AA of FIG. In the present embodiment, instead of attaching the vibrating body to the metal plate 6, a part of the metal plate 6 is formed as a handle 8 that can be operated by the user from the outside of the housing 2. A part (the fixing portion 7) of the metal plate 6 is fixed to the housing 2, and a portion other than the fixing portion 7 constitutes a handle portion 8 which extends outside the housing 2 as a substantially free end. There is. When the user touches the handle portion 8 at an appropriate timing, for example, bends and bends in the direction of the arrow 9, the metal plate 6 elastically deforms and vibrates. At this time, if dust trapped on the metal plate 6 is present, it is dropped by vibration of the metal plate 6, and clogging of the through holes 6a can be prevented. That is, while the dust is effectively dropped from the metal plate 6 using the vibration of the oscillator 5 to which the driving force is supplied from the driving means (not shown) in the fourth embodiment, the handle in the present embodiment Since the part 8 is provided, dust can be effectively dropped from the metal plate 6 manually.

As described above, in the present invention, the dust capture member made of the metal mesh 4 having the mesh 4a and the metal plate 6 having the through holes 6a is used, and the dust capture member is either water repellant or oil repellent or both By combining the above, it is possible to achieve both long-term dust trapping and clogging prevention, and there is no reduction in the flow rate or efficiency of the introduction of cooling air. Furthermore, if the vibrating body 5 is attached to this dust capture member or the user-operable handle portion 8 is provided, the dust capture member can be intentionally vibrated to drop the captured dust, thereby The reliability of clogging prevention is higher. In particular, when this dust removal mechanism is adopted for a display device for displaying an image such as a projector shown in FIG. 13 or a monitor shown in FIG. 14, the image quality is degraded due to the adhesion of dust to the internal light source and optical components, It is possible to suppress the malfunction and the safety deterioration due to the overheating of each part, which is extremely effective. However, according to the present invention, the above-described effects can be obtained even when employed in various electronic devices other than display devices such as a projector and a monitor. Not only the dust removing mechanism of the present invention is provided at a position facing the air inlet 3 of the housing 2 of the apparatus 1 as in each embodiment described above, but an exhaust port (not shown) provided in the housing 2 ) May also be provided with the dust removal mechanism of the present invention.

1 Device (electronic equipment)
2 Case 3 Air intake 4 Reticulated member (wire mesh)
4a vent (mesh)
5 Vibrator 6 Plate-like member (metal plate)
6a vent (through hole)
7 fixed part 8 handle part 9 arrow 10 dust capture member 10a air vent part

Claims

It has a dust capture member covering an air inlet provided in a housing of an electronic device, and the dust capture member has a vent and has one or both of water repellency and oil repellency. There is a dust removal mechanism.
The dust removal mechanism according to claim 1, wherein the dust capture member has a reticulated member having a mesh or a plate-like member having a through hole.
The dust removal mechanism according to claim 1, wherein the dust capture member is provided with a concavo-convex process or a fluorine coating.
The dust removal mechanism according to any one of claims 1 to 3, wherein the dust capture member is made of metal.
The dust removal mechanism according to any one of claims 1 to 4, further comprising a vibrator configured to vibrate at least a part of the dust capture member.
The dust removing mechanism according to any one of claims 1 to 5, further comprising a handle connected to the dust capturing member.
The dust collecting member according to claim 6, further comprising: a fixing portion fixed to the housing, wherein the handle portion is a portion other than the fixing portion and extends outside the housing. Dust removal mechanism.
A dust removing mechanism according to any one of claims 1 to 7, and the case provided with the air inlet and the dust removing mechanism attached at a position facing the air inlet. Has electronic devices.
The electronic device according to claim 8, which is a display device that displays an image.
Applying a treatment for imparting one or both of water repellency and oil repellency to the dust capturing member provided with the vent hole portion; and an air inlet provided in the housing of the electronic device And disposing the dust capturing member inside the housing so as to cover the inside from the inside.
The method for manufacturing an electronic device according to claim 10, wherein the step of applying a treatment for imparting one or both of water repellency and oil repellency to the dust capture member includes a concavo-convex process or a fluorine coating.