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Abstract

The objective is to suppress the leakage of highly thermally conductive gases sealed inside the enclosure while simultaneously suppressing the pressure difference between the inside and outside. [Solution] A housing capable of mounting electronic components, comprising a through hole 32 penetrating the housing and an elastic sheet 33 covering the through hole 32, wherein the elastic sheet 33 expands and contracts in response to the pressure difference between the inside and outside of the housing, thereby suppressing the pressure difference between the inside and outside of the housing.

Description

Technical Field

[0001] The present invention relates to a housing provided with a pressure regulator that adjusts the air pressure in the internal space to maintain a constant air pressure.

Background Art

[0002] Various electronic components are mounted on the housing of an electronic device. For example, as shown in Patent Document 1, the electronic device is used on a ship or the like, and electronic components (electronic devices) such as a display device are mounted on the housing.

[0003] An electronic device used on a ship requires the housing to have a function (water tightness) to prevent the intrusion of moisture such as water in order to suppress the intrusion of water or the like into the housing and the failure of electronic components.

[0004] Here, a ship sails on a wide range of seas or the like, and with the sailing, the temperature and weather change greatly, and the difference between the external air pressure and the internal air pressure of the housing may become large. When the external air pressure changes, the housing receives stress due to the pressure difference between the inside and outside. And when the stress applied to the housing increases, the housing may deform, etc., and the water tightness of the housing cannot be maintained.

[0005] In order to reduce the pressure difference between the inside and outside of the housing, the housing may be provided with mesh holes, and only gases such as air are allowed to flow between the inside and outside of the housing through the mesh holes, thereby suppressing the pressure difference between the inside and outside of the housing. That is, while suppressing the entry of water or the like and maintaining water tightness, only air is allowed to flow between the inside and outside of the housing to suppress the change in air pressure.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, if a gas with high thermal conductivity is sealed inside the enclosure to improve heat dissipation efficiency, the gas may leak out through the mesh holes.

[0008] To solve the above problems, the present invention aims to suppress the pressure difference between the inside and outside of the enclosure while suppressing the outflow of a gas with high thermal conductivity sealed inside the enclosure. [Means for solving the problem]

[0009] To achieve the above objective, an enclosure according to one embodiment of the present invention is an enclosure capable of mounting electronic components, comprising a through hole penetrating the enclosure and an elastic sheet covering the through hole, wherein the elastic sheet expands and contracts in response to the pressure difference between the inside and outside of the enclosure, thereby suppressing the pressure difference between the inside and outside of the enclosure.

[0010] With the above configuration, if the air pressure inside the enclosure is higher than the air pressure outside, the elastic sheet stretches and expands outwards, increasing the internal volume of the enclosure and lowering the internal air pressure. Conversely, if the air pressure inside the enclosure is lower than the external air pressure, the elastic sheet stretches and expands inwards, decreasing the internal volume of the enclosure and raising the internal air pressure. In this way, the elastic sheet adjusts the internal air pressure in accordance with the external air pressure, thereby suppressing the air pressure difference between the inside and outside of the enclosure.

[0011] Furthermore, the elastic sheet may be a rubber sheet.

[0012] Because the elastic sheet can be easily stretched and compressed, it can easily suppress the pressure difference between the inside and outside of the enclosure.

[0013] Furthermore, the device may further include a hanger that can swing relative to the housing, a knob that supports the hanger in the housing and has a male threaded portion that serves as the axis through which the hanger swings, and a female threaded portion into which the male threaded portion is inserted, and the through hole may be provided around the female threaded portion.

[0014] The electronic device is supported on a ship or the like via a hanger supported by the housing. The hanger supports the electronic device (housing) at the knob portion, and supports the electronic device (housing) in a manner that allows for posture changes while the hanger is fixed to the ship or the like, in order to facilitate the use of the electronic device.

[0015] With the above configuration, the elastic sheet can be efficiently installed by utilizing the placement position of the knob, and the pressure difference between the inside and outside of the housing can be easily suppressed by the elastic sheet installed in the through-holes around the placement position of the knob.

[0016] Furthermore, the housing, capable of mounting electronic components, comprises a through-hole penetrating the housing and a suspension module provided in the through-hole, wherein the suspension module comprises a cylindrical portion whose outer wall is along the inner wall of the through-hole and a separation portion that can move along the cylindrical portion inside the cylindrical portion, and the separation portion moves in response to the pressure difference between the inside and outside of the housing, thereby suppressing the pressure difference between the inside and outside of the housing.

[0017] With the above configuration, if the air pressure inside the enclosure is higher than the air pressure outside, the separation unit moves along the inner wall of the cylindrical section toward the outside of the enclosure, increasing the internal volume of the enclosure and decreasing the internal air pressure. Conversely, if the air pressure inside the enclosure is lower than the external air pressure, the separation unit moves along the inner wall of the cylindrical section toward the inside of the enclosure, decreasing the internal volume of the enclosure and increasing the internal air pressure. In this way, the suspension module having a separation unit and a cylindrical section adjusts the internal air pressure of the enclosure in accordance with the external air pressure, thereby suppressing the air pressure difference between the inside and outside of the enclosure.

[0018] Furthermore, the device may further include a hanger that can swing relative to the housing, a knob that supports the hanger in the housing and has a male threaded portion that serves as the axis through which the hanger swings, and a female threaded portion into which the male threaded portion is inserted, wherein the male threaded portion may be provided around the cylindrical portion.

[0019] With the above configuration, the suspension module can be efficiently provided by diverting the arrangement position of the knob portion, and the pressure difference between the inside and outside of the housing can be easily suppressed by the separation portion that moves along the inner wall of the cylindrical portion where the screw portion of the knob portion integrated with the housing is provided.

[0020] Furthermore, a filling gas having a higher thermal conductivity than the air filled inside the housing may be further provided.

[0021] With the above configuration, even if a filling gas having a higher thermal conductivity than air is enclosed inside the housing, while suppressing the leakage of the filling gas from the housing, the internal pressure of the housing is adjusted according to the external pressure of the housing, and the pressure difference between the inside and outside of the housing can be suppressed.

Brief Description of the Drawings

[0022] [Figure 1] It is a perspective view illustrating the configuration of a marine display. [Figure 2] It is a developed view illustrating the configuration of a marine display. [Figure 3] It is an exploded perspective view illustrating the configuration of a main part of a marine display. [Figure 4] It is a diagram for explaining a configuration example of filling a filling gas using a filling mechanism. [Figure 5] It is a diagram illustrating the configuration of a pressure adjustment mechanism using an elastic sheet. [Figure 6] It is a diagram illustrating the configuration of a pressure adjustment mechanism using a suspension module.

Embodiments for Carrying Out the Invention

[0023] As an example of an electronic device in which electronic components 8 are mounted on a housing 2, a marine display will be described with reference to the drawings. The marine display is a display device provided with a display panel 4 as an electronic component 8 on a housing 2 and used on a ship.

[0024] 〔Housing〕 The housing 2 is a roughly rectangular parallelepiped formed by the combination of multiple housing components to create an internal space 3 for mounting electronic components 8. As shown in Figures 1 to 3, in the marine display, the housing 2 comprises a display panel 4 and a rear cover 6. Since the display panel 4 is a display device, it constitutes the front part of the housing 2, and the display unit is exposed from the housing 2. The rear cover 6 is a box shape with one side (front) open, and comprises a top surface, a bottom surface, a left surface, a right surface, and a rear surface.

[0025] In other words, the internal space 3 is the space enclosed by the enclosure 2, and in the case of a marine display, it is the space enclosed by the enclosure components of the enclosure 2, namely the display panel 4 and the rear cover 6.

[0026] The internal space 3 houses various components, such as electronic components 8 that constitute the ship's display (electronic device). For example, the internal space 3 of the ship's display houses a control device (not shown) such as a CPU, other electronic components 8, a circuit board 9 on which the electronic components 8 are mounted, a fan 10, and so on. The control device controls the operation of the display device (display panel 4). One or more fans 10 are provided and are located on the back side of the display panel 4 (inside the internal space 3) to dissipate heat generated by the display panel 4 into the internal space 3 and to circulate the air A (gas) inside the internal space 3. In addition, some of the electronic components 8, such as the control device, are equipped with heat sinks 14.

[0027] The display panel 4 is connected to the opening of the rear cover 6 via a waterproof sheet portion 12 such as a rubber sheet. In other words, the housing 2 is equipped with a waterproof sheet portion 12 provided between the housing components that are assembled together. Marine displays are used on ships, so they are likely to be used in places where they are likely to be exposed to moisture such as seawater and rainwater, and also in humid environments.

[0028] Therefore, if the watertightness (function to prevent water and other moisture from entering) of the housing 2 is low, moisture and humidity may enter the housing 2, potentially adversely affecting the characteristics of the marine display. For this reason, by assembling the housing components via the waterproof sheet section 12 to form the housing 2, the airtightness and watertightness of the housing 2 can be improved.

[0029] The marine display is equipped with a heat dissipation panel 15 on the rear cover 6 (rear surface of the housing 2). The heat dissipation panel 15 is exposed to the outside of the housing 2, and heat generated inside the housing 2 (inside the internal space 3) is transferred to it and dissipated to the outside of the housing 2. An opening 16 may be provided in the rear cover 6 where the heat dissipation panel 15 is installed, and the heat dissipation panel 15 may be installed so as to cover the opening 16. In this case, part of the heat dissipation panel 15 is exposed inside the internal space 3, and the other part is exposed to the outside of the housing 2. As a result, heat generated inside the internal space 3 can be efficiently dissipated to the outside of the housing 2.

[0030] Furthermore, if a heat sink 14 is provided within the internal space 3, it is preferable that the opening 16 be formed at a position opposite the heat sink 14. In other words, it is preferable that the opening 16 and the heat sink 14 are in close proximity, or that the heat sink 14 extends into the opening 16. As a result, the heat dissipated from the heat sink 14 is transferred to the heat dissipation panel 15 via the opening 16, and efficiently dissipated to the outside of the housing 2 via the heat dissipation panel 15.

[0031] Furthermore, it is preferable that the ship's display has a configuration that allows its orientation to be changed according to the manner of use. For this reason, the ship's display is equipped with a hanger 18. The housing 2 (rear cover 6) is equipped with knob portions 19 on the left and right sides. The hanger 18 is supported by the housing 2 in a manner that allows it to swing along the knob portions 19. With the hanger 18 fixed to the hull or the like, the ship's display is supported by the hanger 18, allowing the ship's display to swing relative to the hanger 18 around the knob portions 19, and thus the orientation of the ship's display can be easily changed.

[0032] For example, the knob portion 19 supports the hanger 18 in the housing 2 and has a male thread portion 19A that serves as the axis through which the hanger 18 swings. The male thread portion 19A is cylindrical (rod-shaped) and has a male thread formed on its surface. The housing 2 (rear cover 6) has female thread portions 2A on its left and right sides into which the male thread portion 19A is inserted. The marine display is fixed to the hanger 18 by tightening the male thread portion 19A of the knob portion 19 into the female thread portion 2A of the housing 2, and the marine display becomes swingable relative to the hanger 18 by loosening the male thread portion 19A of the knob portion 19 relative to the female thread portion 2A of the housing 2. The position of the marine display is adjusted when the knob portion 19 is loosened, and the marine display is fixed when the knob portion 19 is tightened. This makes it easy to adjust the position of the marine display.

[0033] [Filling gas] The internal space 3 of the housing 2 is filled with a filling gas 21 (see Figure 4) to enhance heat dissipation. The filling gas 21 fills the internal space 3 and has a higher thermal conductivity than air A. Filling the internal space 3 with such filling gas 21 improves the heat conduction efficiency within the internal space 3 compared to when the internal space 3 is filled with air A. As a result, heat generated by heat-generating elements such as electronic components 8 within the internal space 3 is efficiently transferred to the heat dissipation panel 15 and the housing 2, and efficiently dissipated to the outside of the housing 2 via the heat dissipation panel 15 and the housing 2. Furthermore, if a fan 10 is provided within the internal space 3, the heat transfer efficiency is further improved. Note that the heat-generating elements are not limited to electronic components 8, but may be one or more arbitrary components provided in the internal space 3.

[0034] As a result, the efficiency of heat transfer within the internal space 3 is improved, and the efficiency of heat dissipation to the outside of the housing 2 is improved. This suppresses the overheating of components (heat-generating elements) such as the electronic components 8 mounted inside the housing 2, thereby preventing deterioration of the operational accuracy of the electronic components 8 due to overheating. In particular, even if high-performance electronic components 8 with high power consumption are used in a marine display to improve performance while making the marine display smaller and lighter, the heat generated by the electronic components 8 (heat-generating elements) mounted inside the housing 2 can be efficiently transferred and dissipated, allowing the components to operate with high precision.

[0035] Furthermore, the housing 2 has high watertightness to prevent the filling gas 21 that fills the internal space 3 from leaking out of the housing 2, and to prevent air A from entering the internal space 3 from outside the housing 2.

[0036] Furthermore, the filling gas 21 may be a gas composed of molecular components with a specific gravity lighter than air. This allows the filling gas 21 to move quickly through space, making it easier to transfer heat quickly. Alternatively, the filling gas 21 may be composed of monatomic molecules and have a higher thermal conductivity than air. This allows it to maintain stable molecular properties under various environmental conditions without having different molecular characteristics. Moreover, because the filling gas 21 is composed of monatomic molecules, its relatively light weight allows it to move quickly through space, quickly transferring the temperature (heat) of the electronic components 8 (heat-generating elements) within the internal space 3 of the housing 2. As a result, the temperature of the internal space 3 rises quickly, and the heat generated by the electronic components 8 (heat-generating elements) is quickly dissipated via the housing 2, which is in contact with the external space of the housing 2. Consequently, it is possible to suppress the electronic components 8 from becoming too hot (reduce the temperature of the part with the most heat generated).

[0037] For example, the filling gas 21 can be helium gas. Alternatively, the filling gas 21 may be hydrogen gas or neon gas. The thermal conductivity of air is approximately 0.026 W / mK. In contrast, the thermal conductivity of helium gas is approximately 0.151 W / mK, that of hydrogen gas is approximately 0.180 W / mK, and that of neon gas is approximately 0.049 W / mK, all of which are significantly higher than the thermal conductivity of air.

[0038] In this way, by filling the internal space 3 with helium gas, hydrogen gas, neon gas, or a mixture thereof as the filling gas 21, the efficiency of heat transfer within the internal space 3 is improved. As a result, the efficiency of heat dissipation to the outside of the housing 2 is improved, which suppresses the overheating of components such as electronic components 8 mounted inside the housing 2.

[0039] [Filling of filling gas] Next, using Figure 4, we will explain the filling mechanism 23 for filling the internal space 3 of the housing 2 with the filling gas 21.

[0040] The housing 2 is equipped with an inlet 24 and an exhaust port 25. The inlet 24 and exhaust port 25 are provided to penetrate the housing 2, extending from the internal space 3 to the outside of the housing 2. Inside the internal space 3 of the housing 2, there is a bag portion 26 which is a closed space with a single opening 26A. The bag portion 26 is provided inside the internal space 3, and the open opening 26A of the bag portion 26 is located at the inlet 24.

[0041] In other words, the bag portion 26 is a bag-shaped member with an opening 26A through which the filling gas 21 can be put in and taken out of the bag portion 26. The opening 26A and the inlet 24 are tightly sealed without any gaps, so that gas or liquid does not enter the internal space 3 from the inlet 24. Furthermore, the bag portion 26 has elasticity so that it expands as the filling gas 21 is introduced (injected) and contracts when the filling gas 21 is not injected, for example, like a rubber balloon. The filling mechanism 23 consists of such a bag portion 26, an inlet 24 and an exhaust port 25.

[0042] In this filling mechanism 23, when the bag portion 26 is not filled with the filling gas 21, the internal space 3 of the housing 2 is filled with a gas such as air A. The bag portion 26 is supported by the inlet 24 in a non-expanded state (the state before filling in Figure 4). At this time, the exhaust port 25 is opened to allow air A to pass through.

[0043] When filling the internal space 3 with the filling gas 21, the filling gas 21 is first injected into the bag portion 26 through the opening 26A. As the filling gas 21 is injected, the bag portion 26 expands within the internal space 3. As the bag portion 26 expands, the air A (gas) that was present in the internal space 3 before the filling gas 21 was injected is pushed out of the bag portion 26 and discharged from the exhaust port 25 (the state during filling in Figure 4).

[0044] The filling gas 21 is injected until the internal space 3 of the housing 2 is occupied by the expanded bag portion 26 (the bag portion 26 expands to cover almost the entire internal space 3). For example, it is preferable that the filling gas 21 is injected into the bag portion 26 until the bag portion 26 is in close contact with the entire inner wall of the housing 2. Since the volume of filling gas 21 to be filled to fill the internal space 3 is known in advance, the filling gas 21 may be injected into the bag portion 26 only in a predetermined volume. Once the internal space 3 is occupied by the bag portion 26, the air A in the internal space 3 is almost completely discharged (the <filled> state in Figure 4). When the filling of the bag portion 26 with the filling gas 21 is completed, a lid portion 28, such as a rubber stopper, is provided on the exhaust port 25. The lid portion 28 closes the exhaust port 25 and suppresses the inflow and outflow of gas such as air A through the exhaust port 25.

[0045] Next, the bag portion 26 is ruptured, the filling gas 21 packed inside the bag portion 26 is released, and the internal space 3 of the housing 2 is filled with the filling gas 21. For example, by piercing the rubber stopper, which is the lid portion 28, with a needle, the bag portion 26, which is a rubber balloon, is ruptured (destroyed), and the internal space 3 of the housing 2 is filled with the filling gas 21 that was injected into the bag portion 26 (the <removal> state in Figure 4). At this time, by piercing the bag portion 26 with a needle through the rubber stopper, the bag portion 26 is ruptured in a way that prevents the filling gas 21 from leaking out of the internal space 3 to the outside of the housing 2. It is also preferable to seal the inlet 24 so that the filling gas 21 does not leak out of the housing 2 when the bag portion 26 is ruptured.

[0046] In this way, the bag portion 26 of the filling mechanism 23 is first filled with the filling gas 21, the internal space 3 of the housing 2 is filled with the bag portion 26 filled with the filling gas 21, the air A in the internal space 3 is discharged, and then the internal space 3 is filled with the filling gas 21 that was filled in the bag portion 26. This makes it possible to easily and accurately fill the internal space 3 of the housing 2 with the filling gas 21.

[0047] The bag portion 26 provided at the injection port 24 may be one, or multiple bag portions 26 may be provided. Furthermore, the bag portion 26 may have one opening 26A and be divided into two or more spaces. This makes it easy to fill the internal space 3 with the filling gas 21, even if the inside of the housing 2 is complex, with multiple substrates 9 (see Figure 3) provided inside the housing 2.

[0048] Furthermore, the inlet 24 and the exhaust port 25 may be positioned at separate locations across the internal space 3. By providing the inlet 24 and the exhaust port 25 at separate locations, the bag portion 26 provided in the inlet 24 expands, pushing out the air A, which is then easily discharged from the exhaust port 25.

[0049] [Pressure regulation mechanism] Because marine displays are equipped with electronic components 8, it is necessary to prevent water or other liquids (moisture) from entering the inside of the housing 2 (watertightness). However, with conventional mesh holes that allow only gas to pass through while preventing the passage of water, if the internal space 3 of the housing 2 is filled with a filling gas 21, the filling gas 21 and air A will be swapped (the filling gas 21 will leak out). Therefore, mesh holes could not be used in marine displays filled with a filling gas 21.

[0050] Therefore, in the case of a marine display in which the internal space 3 is filled with a filling gas 21, the marine display is equipped with a pressure adjustment mechanism 30. The pressure adjustment mechanism 30 prevents water and other substances from entering the housing 2 (watertightness) and also prevents gas from entering the housing 2 and leaking gas from the housing 2 to the outside (airtightness). Furthermore, the pressure adjustment mechanism 30 forms part of the housing 2 and adjusts the volume of the internal space 3 of the housing 2 to suppress the pressure difference between the inside and outside of the housing 2 and maintain a constant pressure inside the internal space 3 of the housing 2.

[0051] In other words, the pressure adjustment mechanism 30, by being airtight, can keep the filling gas 21 inside the internal space 3 of the housing 2 within the internal space 3, and can also suppress the pressure difference between the inside and outside of the housing 2, thereby maintaining a constant pressure inside the internal space 3 of the housing 2.

[0052] For example, as shown in Figures 3 and 5, the pressure adjustment mechanism 30 includes a through hole 32 that penetrates the housing 2 and an elastic sheet 33 that covers the through hole 32. Specifically, the housing 2 has a mesh-like through hole 32 in the region where the female thread portion 2A of the mold portion 19B to which the knob portion 19 is attached is formed, for example, in the region surrounding where the female thread portion 2A is formed. The through hole 32 is not limited to a mesh shape, and may be one or more holes of any shape.

[0053] The elastic sheet 33 is provided so as to cover the through hole 32. The elastic sheet 33 is elastic and is, for example, a rubber sheet. The elastic sheet 33 expands and contracts in response to the pressure difference between the inside and outside of the housing 2, thereby suppressing the pressure difference between the inside and outside of the housing 2. In other words, the through hole 32 is provided in the housing 2, which is the boundary between the internal space 3 and the external space. The elastic sheet 33 separates the internal space 3 from the outside of the housing 2 so that gas cannot pass through. Furthermore, the elastic sheet 33 covering the through hole 32 is not fixed to the through hole 32, and moves within the through hole 32 due to the pressure difference between the internal space 3 and the external space, thereby balancing the pressure between the internal space 3 and the external space.

[0054] Since the elastic sheet 33 is provided so as to cover the through hole 32, the entry of gas into the internal space 3 of the housing 2 through the through hole 32 is suppressed, and the leakage of gas from the internal space 3 of the housing 2 is also suppressed. Furthermore, because the elastic sheet 33 is elastic, when the air pressure inside the internal space 3 of the housing 2 becomes lower than the air pressure outside the housing 2, the elastic sheet 33 expands toward the internal space 3. As a result, the volume of the internal space 3 decreases, and the air pressure inside the internal space 3 increases. Similarly, when the air pressure inside the internal space 3 of the housing 2 becomes higher than the air pressure outside the housing 2, the elastic sheet 33 expands toward the outside of the housing 2. As a result, the volume of the internal space 3 increases, and the air pressure inside the internal space 3 decreases. Through this operation of the elastic sheet 33, the volume of the internal space 3 of the housing 2 can be adjusted, thereby suppressing the air pressure difference between the inside and outside of the housing 2. As a result, large changes in the air pressure inside the internal space 3 can be suppressed, and the air pressure can be kept approximately constant.

[0055] Furthermore, by providing the pressure adjustment mechanism 30 in the molded portion 19B, the molded portion 19B for mounting the knob portion 19 and the pressure adjustment mechanism 30 can be provided while sharing the same structure, allowing for efficient formation of the housing 2. In this case, the through hole 32 is provided around the female threaded portion 2A corresponding to the male threaded portion 19A of the knob portion 19. However, the pressure adjustment mechanism 30 is not limited to being provided in the molded portion 19B, and may be provided at any position on the housing 2. Furthermore, the pressure adjustment mechanism 30 may be provided in only one of the left or right knob portions 19, or in both left and right knob portions 19.

[0056] [Another embodiment] (1) In each of the above embodiments, the pressure adjustment mechanism 30 is not limited to a configuration consisting of a through hole 32 and an elastic sheet 33, but can be any configuration as long as it can keep the filling gas 21 in the internal space 3 of the housing 2 within the internal space 3 and suppress the pressure difference between the inside and outside of the internal space 3 of the housing 2.

[0057] For example, as shown in Figure 6, the pressure adjustment mechanism 30 may consist of a through hole 35 that penetrates the housing 2 and a suspension module 36 that fits into the through hole 35. The suspension module 36 comprises a cylindrical portion 37 whose outer wall is along the inner wall of the through hole 35 and whose interior is a cylindrical space, and a separation portion 38 that can move along the inside of the cylindrical portion 37.

[0058] The suspension module 36 is then inserted into the through-hole 35 with high airtightness to prevent gas and liquid (such as water) from passing between the suspension module 36 and the through-hole 35. As a result, the suspension module 36 prevents gas from entering the internal space 3 of the housing 2 and prevents gas from leaking out of the internal space 3 of the housing 2. Furthermore, the separation part 38 moves within the space of the cylindrical part 37 in response to the pressure difference between the inside and outside of the housing 2, thereby suppressing the pressure difference between the inside and outside of the housing 2. In other words, since the separation part 38 can move along the cylindrical part 37 in response to the pressure difference between the inside and outside of the housing 2, when the pressure inside the internal space 3 of the housing 2 becomes lower than the pressure outside the housing 2, the separation part 38 moves toward the internal space 3. As a result, the volume of the internal space 3 decreases and the pressure inside the internal space 3 increases. Similarly, when the pressure inside the internal space 3 of the housing 2 becomes higher than the pressure outside the housing 2, the separation part 38 moves toward the outside of the housing 2. As a result, the volume of the internal space 3 increases and the pressure inside the internal space 3 decreases. The movement of this separation section 38 suppresses the pressure difference between the inside and outside of the housing 2, thereby preventing large changes in the pressure inside the internal space 3 and maintaining the pressure at a roughly constant level.

[0059] Furthermore, by providing the pressure adjustment mechanism 30 (through hole 35 and suspension module 36) in the molded portion 19B, the molded portion 19B for mounting the knob portion 19 and the pressure adjustment mechanism 30 can be provided while sharing a common structure, allowing for efficient formation of the housing 2. In this case, the through hole 35 is provided in the knob portion 19, and a female thread portion 2A is formed on the inner wall of the through hole 35. The suspension module 36 is also provided in the knob portion 19, and a male thread portion 19A corresponding to the female thread portion 2A is formed on the outer circumferential wall of the suspension module 36 (around the cylindrical portion 37). The pressure adjustment mechanism 30 is then formed by integrating the suspension module 36 provided in the knob portion 19 into the through hole 35. The pressure adjustment mechanism 30 may be provided in only one of the left or right knob portions 19, or in both left and right knob portions 19. The suspension module 36 may also be integrated into the housing 2 via a stopper washer 39. However, the pressure adjustment mechanism 30 is not limited to being provided in the molded portion 19B, but may be provided at any position on the housing 2.

[0060] Furthermore, if pressure adjustment is not required, the pressure adjustment mechanism 30 may be omitted. This simplifies the configuration of the ship's display.

[0061] (2) In each of the above embodiments, the filling mechanism 23 can be configured in any way, and the method for filling the internal space 3 of the housing 2 with the filling gas 21 may be carried out by any method without using the filling mechanism 23. For example, the filling gas 21 may be filled while the internal space 3 of the housing 2 is under vacuum. This makes it possible to fill the internal space 3 with the filling gas 21 in an appropriate way depending on the configuration of the marine display.

[0062] (3) In each of the above embodiments, if heat dissipation efficiency can be ensured and the temperature of the electronic component 8 can be suppressed, the display may be filled with air A instead of the filling gas 21. This simplifies the configuration of the marine display.

[0063] (4) In each of the above embodiments, if sufficient heat dissipation efficiency can be ensured, the heat dissipation panel 15 may not be provided. Alternatively, the heat dissipation panel 15 may be provided on the rear cover 6 which does not have an opening 16, and heat may be dissipated from the rear cover 6 through the heat dissipation panel 15. With the above configuration, the configuration of the marine display is simplified.

[0064] (5) In each of the above embodiments, the ship's display may be configured without a hanger 18. In other words, if it is not necessary to adjust the angle of the ship's display, the ship's display may be directly fixed to the hull. This simplifies the configuration of the ship's display.

[0065] (6) In each of the above embodiments, the electronic device is not limited to a marine display, but may be any electronic device equipped with a housing 2. This makes it possible to improve heat dissipation while maintaining watertightness in various electronic devices, or to keep the air pressure inside the housing 2 constant (suppress changes in air pressure inside the housing 2).

[0066] (7) In each of the above embodiments, the housing 2 is not limited to a rectangular parallelepiped, and can be any configuration as long as an internal space 3 is formed. Furthermore, the housing 2 may be formed by combining not only the display panel 4 and the rear cover 6, but also three or more housing components. Also, if the electronic device is not a display device, the front of the housing 2 may be provided with other housing components instead of the display panel 4. Furthermore, if there is no problem with watertightness, the housing components may be combined without the waterproof sheet portion 12. This makes it easy to create an appropriate configuration according to the function of the electronic device.

[0067] (8) In each of the above embodiments, the electronic components 8 provided in the internal space 3 may be any components. The fan 10 and heat sink 14 do not need to be provided in the internal space 3. This makes it easy to create an appropriate configuration according to the function of the electronic device. [Industrial applicability]

[0068] This technology can be applied to electronic devices such as marine displays, in which electronic components are mounted within the internal space of the enclosure. [Explanation of Symbols]

[0069] 2 cabinets 3. Interior space 19 Knob part 19B Molded section 30 Pressure adjustment mechanism 32 Through holes 33 Elastic Sheet 35 Through hole 36 Suspension Modules 37 Cylinder part 38 Separation part

Claims

1. A housing capable of mounting electronic components, A through hole that penetrates the aforementioned housing, The system comprises an elastic sheet covering the through hole, The elastic sheet expands and contracts in response to the pressure difference between the inside and outside of the housing, thereby suppressing the pressure difference between the inside and outside of the housing.

2. The housing according to claim 1, wherein the elastic sheet is a rubber sheet.

3. A hanger that can swing relative to the housing, The hanger is supported by the housing and has a knob portion having a male threaded portion that serves as the axis from which the hanger swings, The system further comprises a female threaded portion into which the male threaded portion is inserted, The housing according to claim 1, wherein the through hole is provided around the female thread portion.

4. A housing capable of mounting electronic components, A through hole that penetrates the aforementioned housing, The system includes a suspension module provided in the through hole, The suspension module comprises a cylindrical portion whose outer wall is along the inner wall of the through hole, and a separating portion that can move along the cylindrical portion inside the cylindrical portion. A housing that suppresses the pressure difference between the inside and outside of the housing by having the separation part move in response to the pressure difference between the inside and outside of the housing.

5. A hanger that can swing relative to the housing, The hanger is supported by the housing and has a knob portion having a male threaded portion that serves as the axis from which the hanger swings, The system further comprises a female threaded portion into which the male threaded portion is inserted, The housing according to claim 4, wherein the male thread portion is provided around the cylindrical portion.

6. The housing according to any one of claims 1 to 5, further comprising a filling gas with a higher thermal conductivity than the air filling the inside of the housing.

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