Imaging device

Abstract

The utility model discloses imaging equipment which comprises a shell part, a transparent window plate is arranged at the front end of the shell part, and a cavity dividing sealing piece is arranged in the middle of the shell part so that a closed mirror cavity can be formed by a cavity body on the front side of the shell part. A lens barrel is arranged in the lens cavity; a cover plate, a lens and a display screen are sequentially arranged in the lens barrel backwards. According to the technical scheme, the cavity dividing sealing piece is arranged in the middle of the shell part so that the front side cavity of the shell part can form the closed mirror cavity, the water content in the current environment can be controlled, the situation that after gaseous water is liquefied due to cooling of the cover plate, the lens and the display screen in the mirror cavity, external water is supplemented is avoided, and therefore the overall liquefaction amount can be controlled. In conclusion, the imaging equipment can effectively solve the problem that the transparent part in the lens cone in the existing imaging equipment is too much in liquefied water in a low-temperature environment.

Description

Technical Field

[0001] The utility model relates to the technical field of optical equipment, and more specifically, to an imaging device. Background Art

[0002] At present, as the outdoor sports market has more and more functional requirements for outdoor night vision products such as scopes, thermal imagers, and digital products, for areas with high air humidity and large temperature differences between indoor and outdoor areas all year round, when using equipment outdoors, due to the long-term humid environment, the air humidity inside the equipment is too high. When there is a large temperature difference, a layer of mist or water droplets will appear on the surface of the lens. In mild cases, it affects the user experience. In severe cases, the image cannot be viewed and may even cause safety problems. At present, there is no particularly good solution to the root cause of lens fogging. It is generally solved by heating external accessories, adding heating wires, increasing air circulation, lens coating, scraper defogging, etc.

[0003] As for products used outdoors, they are relatively small in size and have high requirements for sealing and battery life. Therefore, the existing solutions are not very ideal for these products. And since most lens lenses are inside the device, the fogging location is also inside the device, which cannot be wiped off or sprayed with defogger. Therefore, it is necessary to study the solution to the fogging of the lenses of such imaging devices.

[0004] In summary, how to effectively solve the problem of excessive liquefied water in the transparent parts of the lens barrel of the current imaging device under low temperature environment is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an imaging device, which can effectively solve the problem of excessive liquefied water in the transparent parts of the lens barrel of the current imaging device under low temperature environment.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] An imaging device comprises a shell, wherein the front end of the shell is provided with a transparent window plate, and the middle part of the shell is provided with a chamber seal so that the front side cavity of the shell forms a closed mirror cavity; a lens barrel is provided in the mirror cavity; and a cover plate, a lens and a display screen are provided in sequence backward in the lens barrel.

[0008] In the above imaging device, when the imaging device enters a low-temperature environment during use, since the mirror cavity is in a relatively closed state, after the gas water molecules in the mirror cavity are liquefied, no external gas will be added, especially the gas in the rear side cavity of the shell will not enter the mirror cavity, and further liquid water will not be formed, so the amount of liquefied water is effectively controlled. Because the gas is isolated, the water content of the gas is reduced, the air pressure is reduced, and the liquefaction speed can be effectively reduced, while the temperature rise rate of the gas in the mirror cavity remains unchanged, so the overall liquefaction amount can be effectively reduced. In the above imaging device, by providing a chamber seal in the middle of the shell so that the front side cavity of the shell forms a closed mirror cavity, the water content in the current environment can be controlled to avoid the gaseous water liquefaction caused by the cooling of the cover plate, lens and display screen in the mirror cavity, and then the external water is added, so the overall liquefaction amount can be controlled. In summary, the imaging device can effectively solve the problem of excessive liquefaction of transparent parts in the lens barrel of the current imaging device in a low-temperature environment.

[0009] In some technical solutions, the front end of the lens barrel abuts against the transparent window plate, and the rear end abuts against the chamber seal; the cover plate is located inside the lens barrel and the four peripheral edges are sealed with the lens barrel to separate the lens barrel cavity; the front end face of the lens barrel is in sealing contact with the rear side of the transparent window plate.

[0010] In some technical solutions, the front end face of the lens barrel and the rear side of the transparent window plate are sealed by a waterproof and air-proof ring; the interior of the lens barrel has a shoulder, and the rear side of the cover plate is in sealing contact with the shoulder to achieve sealing.

[0011] In some technical solutions, the transparent window plate is embedded in the front end opening of the shell and is sealed by a sealant; the rear side of the cover plate and the shoulder are sealed by a sealant.

[0012] In some technical schemes, the shell portion includes a front shell portion and an outer shell portion, and the front shell portion and the outer shell portion are plug-connected along the front-to-back direction through an insert portion and a slot, the inner wall of the slot has a boss, and the chamber seal is a sealing body and the two sides of the edge portion are respectively against the boss and the insert portion.

[0013] In some technical solutions, the boss is provided with an annular groove, and the edge of the chamber sealing member forms an annular protrusion matching with the annular groove.

[0014] In some technical solutions, the front shell has the inserting portion, the outer shell has a slot, the front side of the chamber seal has a mounting groove that matches the rear end of the lens barrel, and the rear side of the display screen is arranged against the bottom of the mounting groove.

[0015] In some technical solutions, at least one of the front shell portion and the outer shell is a structural member made of a material with low water absorption rate, and the water absorption rate of the structural member made of a material with low water absorption rate is not higher than 0.05%.

[0016] In some technical solutions, the transparent window plate, the cover plate and the lens are low thermal conductivity material structural parts, and the thermal conductivity of the low thermal conductivity material structural parts is not higher than 0.2 W / M·K.

[0017] In some technical schemes, at least one of the front shell and the outer shell is made of any material selected from metal, PP, PPS, PE, or a combination of multiple materials; the chamber seal is made of any material selected from metal, PP, PPS, PE, or a combination of multiple materials; and at least one of the cover plate and the lens is made of any material selected from transparent PC, PMMA, PVC, PET, transparent PP, and transparent PS, or a combination of multiple materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic cross-sectional structure diagram of an imaging device provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the structure of an imaging device provided by an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the exploded structure of an imaging device provided in an embodiment of the utility model.

[0022] The following are marked in the accompanying drawings:

[0023] 1. Transparent window plate; 2. Waterproof and air-proof ring; 3. Cover plate; 4. Front cover; 5. Sealing ring; 6. Back shell; 7. Lens barrel; 8. Chamber seal; 9. Outer shell; 10. Lens; 11. Display screen; 6-1. Insert; 7-1. Shoulder; 9-1. Boss. DETAILED DESCRIPTION

[0024] The embodiment of the utility model discloses an imaging device, which can effectively solve the problem of excessive liquefied water in the transparent parts of the lens barrel of the current imaging device under low temperature environment.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 3 , Figure 1 A schematic cross-sectional structure diagram of an imaging device provided by an embodiment of the utility model; Figure 2 A schematic diagram of the structure of an imaging device provided by an embodiment of the utility model; Figure 3 A schematic diagram of the exploded structure of an imaging device provided in an embodiment of the utility model.

[0027] In some embodiments, this embodiment provides an imaging device, which specifically includes a shell, a transparent window plate 1, a lens barrel 7, a cover plate 3, a lens 10, a display screen 11 and other structures.

[0028] The shell part can be an integral structure or a split structure. As shown in the accompanying drawings, the shell part is a split structure, and the specific shell part can include a front cover 4, a rear shell 6 and an outer shell 9, wherein the front cover 4 and the rear shell 6 can be collectively referred to as the front shell part, and the front cover 4, the rear shell 6 and the outer shell 9 can be integral parts. The shell part is mainly used to protect the internal structure.

[0029] The lens barrel 7 is arranged in the shell, and the cover plate 3, the lens 10 and the display screen 11 are arranged in sequence in the lens barrel 7. The lens barrel 7, the cover plate 3, the lens 10 and the display screen 11 can be collectively referred to as an eyepiece. It should be noted that, in order to facilitate the description of some structural relationships in the imaging device, the shooting direction of the lens 10 is taken as the forward direction. Figure 1 In the imaging device, the upward direction indicates the forward direction. The specific structures of the lens barrel 7, the cover plate 3, the lens 10 and the display screen 11 are not limited here.

[0030] The front end of the shell has a transparent window plate 1 to transmit light between the outside world and the lens 10, such as the outside light passes through the transparent window plate 1 and the cover plate 3 to reach the lens 10, or the light emitted by the display screen 11 can pass through the lens 10, the cover plate 3 and the transparent window plate 1 to reach the outside world. It should be noted that the shell can also be a transparent part, in which case the transparent window plate 1 and the shell can be integrally formed and connected, and of course the shell and the transparent window plate 1 can also be assembled and connected.

[0031] In some embodiments, a chamber seal 8 may be provided in the middle of the shell so that the front cavity of the shell forms a closed mirror cavity, and the mirror cavity is used to accommodate the lens barrel 7, then the corresponding cover plate 3, lens 10 and display screen 11 in the lens barrel 7 may be located in the mirror cavity. The battery, hardware, movement and objective lens or part thereof may be located on the side of the chamber seal 8 away from the mirror cavity. It should be noted that the chamber seal 8 is used to separate in the front and rear directions so that the mirror cavity is connected to the rear cavity, mainly to prevent the gas in the rear cavity from quickly entering the mirror cavity and causing liquefaction to form too much liquid water, and it is not required to be completely sealed and isolated, and a small amount of leakage is also allowed. For example, the general wire needs to pass through the chamber seal 8, and the outer insulating part of the wire should be in sealed contact with the chamber seal 8, but the small gap between the conductor of the wire and the outer insulating part can be allowed to exist, because, during the cooling process, as the gaseous water in the mirror cavity liquefies, the external gas enters through the small gap, which has little effect on the speed of liquefied water generation. Of course, the above-mentioned wires can also be connected by a tight-fitting structure such as FPC (flexible printed circuit).

[0032] In the above imaging device, when the imaging device enters a low temperature environment, since the mirror cavity is in a relatively closed state, after the gas water molecules in the mirror cavity are liquefied, no external gas will be added, especially the gas in the rear side cavity of the shell will not enter the mirror cavity, and further liquid water will not be formed, so the amount of liquefied water can be effectively controlled. Because the gas is isolated, the water content of the gas is reduced, the air pressure is reduced, and the liquefaction speed can be effectively reduced, while the temperature rise speed of the gas in the mirror cavity remains unchanged, so the overall liquefaction amount can be effectively reduced. In the above imaging device, by providing a chamber seal 8 in the middle of the shell so that the front side cavity of the shell forms a closed mirror cavity, the water content in the current environment can be controlled to avoid the gaseous water liquefaction caused by the cooling of the cover plate 3, the lens 10 and the display screen 11 in the mirror cavity, and the external water is added, so the overall liquefaction amount can be controlled. In summary, the imaging device can effectively solve the problem of excessive liquefaction of water in the transparent part of the lens barrel 7 in the current imaging device under low temperature environment.

[0033] In some embodiments, the front end of the lens barrel 7 can be abutted against the transparent window plate 1, and the rear end can be abutted against the chamber sealing member 8. The abutment can be direct or indirect, and can be specifically configured accordingly as needed.

[0034] In order to better avoid the formation of more liquid on the transparent window plate 1 and the cover plate 3 during the cooling process, the cover plate 3 can be located in the lens barrel 7 and the surrounding parts can be sealed and connected to the lens barrel 7 to separate the barrel cavity of the lens barrel 7, so that the front side cavity and the rear side cavity of the cover plate 3 are separated. It is also preferred that the front end surface of the lens barrel 7 is in sealing contact with the rear side of the transparent window plate 1, so that a sealed cavity is formed between the cover plate 3 and the transparent window plate 1. This can better avoid the formation of liquid water on the transparent window plate 1.

[0035] In particular, when the thermal conductivity of the transparent window plate 1 is higher than that of the internal cover plate 3, lens barrel 7, lens 10 and display screen 11, the above arrangement can be used to isolate the cavity between the transparent window plate 1 and the cover plate 3 from other cavities of the mirror cavity, which can effectively prevent excessive gaseous water molecules in the mirror cavity from liquefying on the transparent window plate 1 to form liquid water, that is, the above arrangement can prevent gaseous molecules in cavities other than the cavity between the transparent window plate 1 and the cover plate 3 in the mirror cavity from liquefying on the inner side of the transparent window plate 1. The transparent window plate 1 is generally made of a glass plate, while the cover plate 3 and the lens 10 are made of a transparent body with a thermal conductivity significantly lower than that of the transparent window plate 1.

[0036] In some embodiments, since the volume of the cavity between the transparent window plate 1 and the cover plate 3 is very small, a small amount of leakage will increase the volume of the cavity. Therefore, the sealing requirements of the joints are relatively high. Therefore, the sealing effect of the direct contact between the transparent window plate 1 and the cover plate 3 is not good enough. Based on this, the front end face of the lens barrel 7 and the rear side of the transparent window plate 1 can be sealed by a waterproof and airtight ring 2.

[0037] Correspondingly, the seal between the lens barrel 7 and the cover plate 3 can be achieved by the edge of the cover plate 3 contacting the inner wall of the lens barrel 7, but such a seal is not reliable. Based on this, it is preferred that the lens barrel 7 has a shoulder 7-1 inside, and the rear side of the cover plate 3 is in sealing contact with the shoulder 7-1 to achieve sealing. Specifically, an annular shoulder 7-1 can be formed so that in the circumferential direction of the cover plate 3, the edge of the cover plate 3 can always maintain a sealing contact with the shoulder 7-1.

[0038] In some embodiments, the transparent window plate 1 can be embedded in the front opening of the shell and sealed by a sealant, and the rear side of the cover plate 3 and the shoulder 7-1 can be sealed by a sealant. Of course, they can also be sealed by a sealing pad such as silicone or directly contacted to achieve sealing.

[0039] In some embodiments, in order to facilitate the installation of the above-mentioned chamber seal 8 and to better achieve sealed separation, the shell part can include a front shell part and an outer shell 9, and the front shell part and the outer shell 9 can be an integral part or an assembly. The front shell part and the outer shell 9 are plug-connected in the front-to-back direction through the plug-in part 6-1 and the slot. Specifically, the front shell part can be provided with the plug-in part 6-1, and the outer shell 9 is provided with the slot; of course, the front shell part can also be provided with the slot, and the outer shell 9 is provided with the plug-in part 6-1. Specifically, the front shell part can include a rear shell 6 and a front cover 4, wherein the rear shell 6 and the outer shell 9 are fixedly connected, such as the above-mentioned plug-in connection, and the front cover 4 and the rear shell 6 are connected at the front end and a sealing ring 5 is provided between them for sealing, wherein the front cover 4 is provided with a front end opening for installing the transparent window panel 1.

[0040] The inner wall of the slot has a convex shoulder 9-1, and the two sides of the edge of the chamber seal 8 are respectively against the convex shoulder 9-1 and the inserting part 6-1, so that the edge of the sealing body is clamped by the convex shoulder 9-1 and the inserting part 6-1 to achieve sealing. The sealing here not only achieves the sealing between the inner cavity of the front shell and the external environment, but also achieves the sealing between the inner cavity of the front shell and the cavity of the outer shell 9. In order to better achieve the clamping seal, the chamber seal 8 can be a sealing body, such as using the same material as the sealing gasket, such as a rubber part, a silicone part, etc.

[0041] In some embodiments, in order to avoid separation under pressure and provide a sealing effect, the shoulder 9-1 may be provided with an annular groove, and the edge of the chamber seal 8 may form an annular protrusion that matches the annular groove. Of course, the annular groove may also be provided on the insert 6-1 to match the annular protrusion on the chamber seal 8. It may even be provided that both the insert 6-1 and the shoulder 9-1 are provided with annular grooves, respectively matching the annular protrusions on both sides of the chamber seal 8. Of course, the annular protrusion and the annular groove may also be provided in the opposite manner, such as the chamber seal 8 is provided with an annular groove, and the insert 6-1 or the shoulder 9-1 is provided with a matching annular protrusion.

[0042] In some embodiments, the front shell part may have an inserting portion 6-1, and the outer shell 9 may have a slot, and the inserting portion 6-1 may be a cylindrical structure. The front side of the chamber seal 8 may further have a mounting groove that matches the rear end of the lens barrel 7, and the rear side of the display screen 11 is disposed against the bottom of the mounting groove.

[0043] In some embodiments, at least one of the front shell and the outer shell 9 can be made of a low water absorption material structure, which can prevent the moisture absorbed by the front shell and the outer shell 9 from volatilizing into the interior of the device. One or all of the front shell and the outer shell 9 can be made of a low water absorption material structure, wherein the front shell is preferably a low water absorption material structure. In addition, it should be noted that being a low water absorption material structure means that at least the main structure is a low water absorption material structure.

[0044] Specifically, the water absorption rate of the low water absorption material structure can be no higher than 0.05% as a reference. Specifically, at least one of the front shell and the shell 9 can be a metal part, any one of PP (polypropylene), PPS (polyphenylene sulfide), PE (polyethylene) or multiple material components. Among them, multiple material components refer to having multiple structural parts, and each structural part is a different material part, such as one is a PP material part and the other is a PPS material part.

[0045] In some embodiments, the transparent window plate 1, the cover plate 3 and the lens 10 can be made of low thermal conductivity material structural parts, so that the temperature difference between the environment and the material can be reduced and the degree of fogging can be improved. Specifically, this is because the thermal conductivity of air is about 0.03W / M·K (watt / meter·degree), while the thermal conductivity of transparent glass materials is 0.712-1.34W / M·K, and the thermal conductivity of plastic materials is generally around 0.2W / M·K. The lower the thermal conductivity, the slower the heat dissipation. Therefore, when the ambient temperature changes, the material parts with high thermal conductivity will quickly dissipate heat to the ambient temperature, while the air temperature is still high. When the hot and humid air with high temperature hits the cold material, the moisture in the air will condense on the surface of the material, and then form water mist or water droplets. The use of low thermal conductivity material structural parts can well avoid this problem. Specifically, the thermal conductivity of low thermal conductivity material structural parts can be made no higher than 0.2W / M·K.

[0046] Specifically, the cover plate 3 and the lens 10 may be made of at least one of transparent PC (polycarbonate), PMMA (polymethyl methacrylate, also known as acrylic or plexiglass), PVC (polyvinyl chloride), PET (polyethylene terephthalate), transparent PP, and transparent PS (polystyrene) or a composite of multiple materials.

[0047] In some embodiments, considering that the role of the chamber seal 8 is to separate the front shell part from the outer shell 9, so that the lens 10 is alone in a cavity and is in direct contact with the air in the internal environment of the outer shell 9, it can be made of metal material or PP, PPS, PE and other materials.

[0048] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An imaging device, comprising a shell, wherein the front end of the shell has a transparent window plate (1), characterized in that: A chamber sealing member (8) is arranged in the middle of the shell part so that the front side cavity of the shell part forms a closed mirror cavity; a lens barrel (7) is arranged in the mirror cavity; and a cover plate (3), a lens (10) and a display screen (11) are arranged in sequence in the rear direction in the lens barrel (7).

2. The imaging device according to claim 1, characterized in that The front end of the lens barrel (7) abuts against the transparent window plate (1), and the rear end abuts against the chamber sealing member (8); the cover plate (3) is located inside the lens barrel (7) and its four peripheral edges are sealedly connected to the lens barrel (7) to separate the barrel chamber of the lens barrel (7); the front end surface of the lens barrel (7) is in sealing contact with the rear side of the transparent window plate (1).

3. The imaging device according to claim 2, characterized in that The front end surface of the lens barrel (7) and the rear side of the transparent window plate (1) are sealed via a waterproof and airtight ring (2); a shoulder (7-1) is provided inside the lens barrel (7), and the rear side of the cover plate (3) is in sealing contact with the shoulder (7-1) to achieve sealing.

4. The imaging device according to claim 3, characterized in that The transparent window plate (1) is embedded in the front end opening of the shell and is sealed by a sealant; the rear side of the cover plate (3) and the clamping shoulder (7-1) are sealed by a sealant.

5. The imaging device according to any one of claims 1 to 4, characterized in that: The shell portion comprises a front shell portion and an outer shell (9), wherein the front shell portion and the outer shell (9) are plug-connected in a front-to-back direction via an inserting portion (6-1) and a slot, wherein an inner wall of the slot has a convex shoulder (9-1), and the chamber sealing member (8) is a sealing body and the two sides of the edge portion are respectively against the convex shoulder (9-1) and the inserting portion (6-1).

6. The imaging device according to claim 5, characterized in that The boss (9-1) is provided with an annular groove, and the edge of the chamber sealing member (8) forms an annular protrusion matching the annular groove.

7. The imaging device according to claim 5, characterized in that The front shell portion has the insert portion (6-1), the outer shell (9) has a slot, the front side of the chamber seal (8) has a mounting groove that matches the rear end of the lens barrel (7), and the rear side of the display screen (11) is arranged against the bottom of the mounting groove.

8. The imaging device according to claim 5, characterized in that At least one of the front shell portion and the outer shell (9) is a structural member made of a material with low water absorption rate, and the water absorption rate of the structural member made of a material with low water absorption rate is not higher than 0.05%.

9. The imaging device according to claim 5, characterized in that The transparent window plate (1), the cover plate (3) and the lens (10) are low thermal conductivity material structural parts, and the thermal conductivity of the low thermal conductivity material structural parts is not higher than 0.2 W / M·K.

10. The imaging device according to claim 5, characterized in that At least one of the front shell and the outer shell (9) is made of any material selected from metal, PP, PPS, and PE; the chamber seal (8) is made of any material selected from metal, PP, PPS, and PE; and at least one of the cover plate (3) and the lens (10) is made of any material selected from transparent PC, PMMA, PVC, PET, transparent PP, and transparent PS.

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