CN220154779U - Protective housing and shooting device - Google Patents

Abstract

The utility model relates to the technical field of protective shells, in particular to a protective shell and a shooting device. The protective shell comprises a shell structure and a light transmission part, wherein the shell structure is provided with a containing cavity and a view finding window communicated with the containing cavity; the light transmission part comprises a first lens and a second lens arranged on one side of the first lens facing the corresponding view finding window, and the second lens covers the view finding window. The first lens is provided with a light incident surface and a light emergent surface which are arranged in a back-to-back mode, the second lens is provided with an outer refractive surface and a light emergent surface which are arranged in a back-to-back mode, the inner refractive surface and the light emergent surface face towards the view finding window, a heat insulation cavity is formed between the inner refractive surface and the outer refractive surface, and the average curvature of the inner refractive surface is larger than that of the outer refractive surface. The utility model improves the anti-fog performance of the protective shell.

Description

Protective housing and shooting device

Technical Field

The utility model relates to the technical field of protective shells, in particular to a protective shell and a shooting device.

Background

In the prior art, some shooting devices can set the outermost lenses of the lenses into a double-layer structure, so that the anti-fog purpose is achieved.

In practical application, when the shooting equipment is arranged on the protective shell, the protective shell does not have an anti-fog function, so that the shooting equipment in the protective shell is blurred in view finding.

Disclosure of Invention

The utility model provides a protective shell and a shooting device, which can improve the anti-fog performance of the protective shell.

In order to solve the technical problems, one technical scheme adopted by the embodiment of the utility model is as follows: there is provided a protective housing comprising:

the shell structure is provided with an accommodating cavity and a view finding window communicated with the accommodating cavity; and

the light transmission part is arranged on the view finding window and comprises a first lens and a second lens arranged on one side, facing the corresponding view finding window, of the first lens, the second lens covers the view finding window, the first lens is provided with a light inlet surface and a light outlet surface which are arranged oppositely, the second lens is provided with an outer refraction surface and a light outlet surface which are arranged oppositely, and the inner refraction surface and the light outlet surface face the view finding window;

wherein a heat insulation cavity is formed between the inner refractive surface and the outer refractive surface, and the average curvature of the inner refractive surface is larger than that of the outer refractive surface.

In some embodiments, the edge of the first lens and the edge of the second lens are disposed in contact with each other to enclose the heat-insulating cavity.

In some embodiments, the light incident surface is a convex surface, the inner refractive surface is a concave surface, the outer refractive surface is a convex surface, and the light emergent surface is a concave surface;

in some embodiments, at least one of the light incident surface, the inner refractive surface, the outer refractive surface, and the light exiting surface is aspheric.

In some embodiments, the insulating cavity is sealingly disposed, and the insulating cavity has a lower heat transfer efficiency than the first lens and/or the second lens.

In some embodiments, the projection of the second lens is located within the projection of the first lens along the optical axis direction of the light transmitting portion.

In some embodiments, the accommodating cavity is a sealed cavity, and the light-transmitting part is hermetically arranged at the view finding window.

In some embodiments, a first mating portion is disposed on a side of the first lens facing the shell structure, and a first mounting portion is disposed on a side of the shell structure facing the first lens, the first mating portion mating with the first mounting portion to seal the first lens to the viewing window;

in some embodiments, a second mating portion is provided on a side of the second lens facing the housing structure, a second mounting portion is provided on a side of the housing structure facing the second lens, and the second mating portion mates with the second mounting portion to seal the second lens to the viewing window.

In some embodiments, the first mating portion is an annular first bead, the first mounting portion is a first groove surrounding the second lens, and the first bead is inserted into the first groove;

in some embodiments, the second fitting portion is a ring-shaped second rib, the second mounting portion is a second groove surrounding the viewfinder window, and the second rib is inserted into the second groove.

In some embodiments, a third groove is formed on a side of the second lens facing the first lens, and sealant is disposed in the third groove to seal the heat insulation cavity

In some embodiments, the effective light entrance aperture of the incident surface of the first lens is higher than the outer surface 16 of the shell structure in a direction radially outward of the optical axis, the angle between the outgoing light ray and the incident light ray is smaller than a first preset angle, and the incident point of the incident light ray is higher than the outgoing point of the outgoing light ray in a direction radially outward of the optical axis.

In some embodiments, the first optic is provided with a raised portion that is connected to the shell structure.

In some embodiments, the shell structure is provided with a raised portion that connects with the first optic.

The utility model also provides a shooting device which comprises shooting equipment and the protective shell, wherein the shooting equipment is accommodated in the accommodating cavity of the protective shell.

In contrast to the case of the related art, the present utility model provides that the average curvature of the inner refractive surface of the light transmitting portion is larger than that of the outer refractive surface. Such that the spacing between the first lens and the second lens is greater at the center than at the edges, such that the space of the intermediate portion of the insulating cavity is greater than the space of the edge portion in the direction parallel to the optical axis, in other words, the insulating cavity is substantially almond-shaped. Therefore, the volume of the heat insulation cavity and the interval between the central part of the first lens and the central part of the second lens are increased, the heat insulation performance of the light transmission part can be enhanced, and the effect of inhibiting fog is improved.

Drawings

FIG. 1 is a schematic structural view of a protective shell according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the shell structure of FIG. 1;

FIG. 3 is a cross-sectional view of a protective shell according to an embodiment of the utility model;

fig. 4 is a partial enlarged view at a in fig. 3.

Reference numerals in the specific embodiments are as follows:

100. a protective shell;

1. a shell structure; 11. a housing chamber; 12. a half shell; 13. a hinge; 14. locking; 15. a connection part; 16. an outer surface 16 of the shell structure; 161. a viewfinder window; 17. a first groove; 18. a second groove;

2. a light transmitting portion; 21. a first lens; 211. the first convex rib; 22. a raised portion; 23. a second lens; 231. the second convex rib; 232. a third groove; 24. a heat insulating chamber;

l1, incident light; l2, emitting light rays; l3, middle light.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.

In the description of the present utility model, it should be noted that, orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these orientation words do not indicate or imply that the apparatus or elements being referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In the description of the present utility model, it should be noted that, the terms "first," "second," and the like are used for defining the components, and are merely for convenience in distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, so they should not be construed as limiting the scope of the present utility model. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more unless otherwise specifically defined.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features mentioned in the different embodiments of the utility model described below can be combined with one another as long as they do not conflict with one another.

The present utility model provides a protective enclosure 100. The protective enclosure 100 may be a submersible or other form of protective enclosure. The protective housing 100 is suitable for use with a photographing device including, but not limited to, panoramic cameras, motion cameras, and the like.

Referring to fig. 1, in some embodiments, a protective case 100 includes a case structure 1 and a light transmitting portion 2, and a receiving cavity is provided in the case structure 1, and a photographing apparatus is received in the receiving cavity. Referring to fig. 2, the case structure 1 is further provided with a view finding window 161 communicating with the receiving cavity, and when the photographing apparatus is received in the receiving cavity, a camera of the photographing apparatus is disposed corresponding to the view finding window 161 so as to receive external view finding light through the view finding window 161.

In an embodiment, the rest of the photographing apparatus may be sealed by the case structure 1. The light-transmitting portion 2 is hermetically disposed in the viewfinder window 161, and the light-transmitting portion 2 and the case structure 1 together realize waterproof sealing of the photographing apparatus. Referring to fig. 1 and 2, in one embodiment, the case structure 1 includes two half-cases 12, the two half-cases 12 being connected by a hinge 13 so as to be openable and closable with each other, and a latch 14 being provided so as to be capable of locking the two half-cases 12 in a closed state. When the two half-shells 12 are opened, the photographing apparatus can be taken out or put in; when the two half-shells 12 are closed, the two half-shells enclose a containing cavity 11 to protect shooting equipment. Further, a sealing ring is provided between the two half-shells 12. The shell structure 1 is further provided with a connection 15, the connection 15 being for connecting an external support device, such as a selfie stick. In other embodiments, the rest of the photographing apparatus may not be sealed by the case structure 1, and the light-transmitting portion 2 may not seal the viewfinder window.

Referring to fig. 3, in an embodiment, the light-transmitting portion 2 includes a first lens 21 and a second lens 23 disposed on a side of the first lens 21 facing the corresponding viewing window 161, the second lens 23 covers the viewing window 161, the first lens 21 has a light incident surface and a light incident surface disposed opposite to each other, and the second lens 23 has a light emergent surface and a light incident surface disposed opposite to each other, wherein the light incident surface and the light emergent surface are both facing the viewing window 161;

in the present embodiment, the heat insulating chamber 24 is formed between the inner refractive surface and the outer refractive surface, and the average curvature of the inner refractive surface is larger than that of the outer refractive surface. It should be noted that, since the average curvature of the inner refractive surface of the first lens 21 (i.e., the surface of the first lens 21 facing the viewing window 161) is larger than the average curvature of the outer refractive surface of the second lens 23 (i.e., the surface of the second lens 23 facing away from the viewing window 161), the interval between the first lens 21 and the second lens 23 is larger at the center than at the edge, so that the space of the middle portion of the heat insulating chamber 24 is larger than the space of the edge portion in the direction parallel to the optical axis, in other words, the heat insulating chamber 24 is substantially almond-shaped. In this way, the volume of the heat insulating chamber 24 and the interval between the center portion of the first lens 21 and the center portion of the second lens 23 are advantageously increased, so that the heat insulating performance of the light transmitting portion 2 can be enhanced, and the effect of suppressing fog can be enhanced. Further, the light incident surface, the inner refraction surface, the outer refraction surface and the light emergent surface are all aspheric, the light incident surface is convex, the inner refraction surface is concave, the outer refraction surface is convex, and the light emergent surface is concave. So set up, the volume in increase heat-proof chamber that can be as far as, promote the antifogging performance of protecting crust. Wherein, when the first lens 21 and the second lens 23 are spherical lenses, the average curvature may refer to the curvature of the spherical lenses; when the first lens 21 and the second lens 23 are aspherical lenses, the average curvature may refer to the average of the curvatures of the aspherical lenses.

Referring to fig. 3 and 4, in one embodiment, the edges of the first lens 21 and the second lens 23 are positioned to abut each other to enclose a sealed, thermally insulated cavity 24. In this embodiment, the sealed heat-insulating cavity 24 not only can insulate heat and realize anti-fog, but also can prevent dust, water vapor or other sundries from entering the gap between the first lens 21 and the second lens 23, which is beneficial to improving the shooting effect of the shooting device.

In some embodiments, the heat conduction efficiency of the medium such as air in the heat insulation cavity 24 is lower than that of the first lens 21 and the second lens 23, so that the heat conduction efficiency between the light incident surface of the first lens 21 and the light emergent surface of the second lens 23 can be reduced by spacing the first lens 21 and the second lens 23 from each other and surrounding the heat insulation cavity 24, thereby enhancing the heat insulation performance of the light transmission portion 2. It can be understood that when the protective housing 100 is used underwater, the temperature in the protective housing 100 is higher than the external water temperature due to the lower underwater temperature and the heat generated by the photographing device, although the temperature of the light incident surface of the first lens 21 may be equal to the water temperature, the temperature of the light emergent surface of the second lens 23 is not too low due to the reduced heat conduction efficiency of the light transmitting portion 2, so that the situation that mist is generated due to the fact that the temperature of the second lens 23 is lower than the temperature in the accommodating cavity of the protective housing 100 can be avoided, which is beneficial to improving the photographing effect.

In some embodiments, the insulating chamber 24 is in a vacuum state, or the insulating chamber 24 is filled with an insulating medium, and the insulating medium includes, but is not limited to, a medium that is an insulating gas and does not affect shooting effect, for example, one or a combination of multiple gases of carbon dioxide, methane, argon and krypton. It should be noted that, when the protective housing 100 is a diving housing, the diving time may be as long as ten minutes, and in some embodiments, the vacuum state in the heat insulation cavity 24 may improve the heat insulation effect, and prevent the vapor in the heat insulation cavity 24 from causing the first lens 21 or the second lens 23 to generate mist to affect the shooting quality.

Referring to fig. 3, in some embodiments, in a direction radially outward along the optical axis, for example, in a direction along the optical axis directed by the camera toward the light transmitting portion 2, the effective light entrance aperture of the light entrance surface is higher than the outer surface 16 of the shell structure 1, so that light having an included angle with the optical axis greater than a preset angle (for example, 90 degrees) can be better received by the light transmitting portion 2 and is not easily blocked by the shell structure 1, thereby improving the field angle of view of the protective shell 100. In some embodiments, the effective light entrance aperture of the light entrance surface may be made higher than the outer surface 16 of the shell structure 1 by increasing the distance between the light entrance surface and the outer surface 16 of the shell structure 1. For example, in some embodiments, the light-transmitting portion 2 is provided with a raised portion 22 connected to the shell structure 1, and the raised portion 22 may be integrally formed with the main body structure of the light-transmitting portion 2, or the shell structure 1 may be provided with a raised portion 22 connected to the light-transmitting portion 2 to increase the distance between the light incident surface and the outer surface 16 of the shell structure 1. When the raised portion 22 is provided on the shell structure 1, the raised portion 22 includes, but is not limited to, a boss or pad connected to an end of the light transmissive portion 2. In other embodiments, the raised portion 22 is further used to block light, so as to avoid the problem that the light incident from the raised portion 22 enters the shell structure 1 and the imaging of the photographing device is affected by stray light. Optionally, the raised portion 22 is made of a light shielding material (opaque material); and/or, the raised portion 22 is provided with a light shielding layer (e.g., a light shielding film is attached thereto). Wherein, when the elevation portion 22 realizes the shading through attaching the opaque material, the elevation portion 22 can be the light-transmitting material to set up with the first lens 21 is integrative, reduces manufacturing cost.

In this embodiment, due to the arrangement of the raised portion 22, the incident point of the incident light L1 is higher than the emergent point of the emergent light L3 in the radially outward direction along the optical axis, so that the photographing device does not need to protrude or excessively protrude from the outer surface 16 of the shell structure 1, and can receive the light refracted by the light transmitting portion 2, which is beneficial to miniaturization of the protective housing 100 and compatibility of the protective housing 100 with most panoramic photographing devices.

Referring to fig. 3, an included angle between the incident light ray L1 and the outgoing light ray L2 is smaller than a first predetermined included angle, for example, the incident light ray L1 and the outgoing light ray L2 are substantially parallel. In some embodiments, the first lens 21 is capable of refracting the incident light L1 into an intermediate light L2, in other words, after the incident light L1 enters the first lens 21, the intermediate light L2 is refracted by the first lens 21 to form an intermediate light L2, and the intermediate light L2 enters the second lens 23, and is refracted by the second lens 23 to form an outgoing light L3. The contained angle of middle light L2 and emergent light L3 is greater than first preset contained angle, has both been favorable to the rational transition of light at light-transmitting portion 2, also can make light-transmitting portion 2 smoothly with incident light L1 refraction for emergent light L3 after, the contained angle between incident light L1 and the emergent light L3 is less than first preset contained angle to inhibit aberration's such as distortion production, promote shooting equipment's imaging quality. In practical application, taking the lens of the light transmission part as an aspheric lens as an example, the angle between the emitted light and the incident light is smaller than the first preset angle, and the curvature of the lens can be adjusted to meet the refraction requirement.

In some embodiments, in the direction radially outward along the optical axis, the incident point of the incident light L1 on the first lens 21 is higher than the exit point of the intermediate light L2 on the first lens 21, and the incident point of the intermediate light L2 on the second lens 23 is higher than the exit point of the exit light L3 on the second lens 23, so that the light transmitting portion 2 can reasonably refract the high light to the low position through the first lens 21 and the second lens 23, so that the camera of the photographing device can smoothly receive the viewfinder light, and the requirement of panoramic photographing is met.

In some embodiments, in a direction radially outwards along the optical axis, the effective light incident aperture of the light incident surface is higher than the effective light incident aperture of the light emergent surface, so that the light transmitting portion 2 can refract light at a high position to a low position, so that a camera of a photographing device positioned at the low position can better receive the light, and view finding requirements of panoramic photographing are met.

In an embodiment, the lens of the photographing apparatus is at least partially lower than the outer surface 16 of the housing structure 1 in the case that the photographing apparatus is accommodated in the accommodation cavity of the protection housing.

Referring to fig. 3, when the photographing apparatus is accommodated in the accommodating chamber, a camera of the photographing apparatus is disposed corresponding to the viewing window 161 so as to receive external viewing light through the viewing window 161, and the rest of the photographing apparatus may be sealed by the case structure 1. The light-transmitting portion 2 is hermetically disposed in the viewfinder window 161, and the light-transmitting portion 2 and the case structure 1 together realize waterproof sealing of the photographing apparatus.

In some embodiments, the projection of the second lens 23 is located within the projection of the first lens 21 along the direction in which the first lens 21 and the second lens 23 overlap; the first lens 21 is connected with the shell structure 1, and the second lens 23 is clamped between the shell structure 1 and the first lens 21. Therefore, the first lens 21 is covered above the second lens 23, the first lens 21 and the second lens 23 are connected and are connected with the shell structure 1 through the raised portion 22, and the connection strength between the whole first lens 21 and the whole second lens 23 and the shell structure 1, namely the connection strength between the light-transmitting portion 2 and the shell structure 1, is effectively enhanced.

In some embodiments, a first mating portion is provided on a side of the first lens 21 facing the housing structure 1, and a first mounting portion is provided on a side of the housing structure 1 facing the first lens 21, and the first mating portion mates with the first mounting portion to seal the first lens 21 against the viewing window 161.

Illustratively, referring to fig. 3 and 4, a side of the housing structure 1 facing the first lens 21 is provided with a first groove 17 surrounding the second lens 23, and a side of the first lens 21 facing the housing structure 1 is provided with an annular first rib 211, the first rib 211 being adapted to cooperate with the first groove 17 to seal the first lens 21 against the viewing window 161. In the present embodiment, the first rib 211 is provided on the side of the raised portion 22 facing the shell structure 1 as an example, and it is understood that the first rib 211 may be provided on the first lens 21 or the raised portion 22, but when the first lens 21 is spaced from the shell structure 1, the first rib 211 needs to be provided on the raised portion 22. In other embodiments, the first groove 17 surrounding the second lens 23 may be replaced with a rib, and correspondingly, the first rib 211 may be replaced with a groove.

In some embodiments, a second mating portion is provided on a side of the second lens 23 facing the housing structure 1, and a second mounting portion is provided on a side of the housing structure 1 facing the second lens 23, and the second mating portion mates with the second mounting portion to seal the second lens 23 against the viewing window 161.

Illustratively, referring to fig. 3 and 4, a side of the housing structure 1 facing the second lens 23 is provided with a second groove 18 surrounding the viewing window 161, and a side of the second lens 23 facing the housing structure 1 is provided with an annular second bead 231, the second bead 231 being adapted to cooperate with the second groove 18 to seal the second lens 23 against the viewing window 161.

The first convex rib 211 is matched with the first groove 17, so that a good sealing effect is achieved between the first lens 21 and the shell structure 1, the second convex rib 231 is matched with the second groove 18, a good sealing effect is achieved between the second lens 23 and the shell structure 1, the second groove 18 surrounds the view finding window 161, the first groove 17 surrounds the second lens 23, and therefore the first lens 21 and the second lens 23 both seal the view finding window 161, and sealing of the accommodating cavity 11 is achieved. Sealant may be further disposed in the first groove 17 and the second groove 18 to enhance the connection strength between the first and second lenses 21 and 23 and the case structure 1, and to further enhance the sealing effect between the first and second lenses 21 and 23 and the case structure 1. In an embodiment, the first recess 17 and the second recess 18 are both located at the outer surface 16 of the shell structure 1.

It will be appreciated that in the above embodiment, one of the first lens 21 and the second lens 23 may seal the view window 161, and the first lens 21 and the second lens 23 may seal the view window 161 at the same time, so that the seal effect may be enhanced, and when one of the lenses fails to seal, the other lens may still seal the view window 161, so that the case that water is introduced due to the suddenly occurring seal failure when the protective housing 100 is used underwater may be reduced, and the loss of the photographing apparatus due to water is reduced.

Referring to fig. 4, in an embodiment, a third groove 232 is formed on a side of the second lens 23 facing the first lens 21, and a sealant is disposed in the third groove 232 to seal the heat insulation cavity 24. By providing the seal adhesive to adhere the first lens 21 and the second lens 23, the sealing effect between the first lens 21 and the second lens 23 can be enhanced; and set up third recess 232, the sealing washer is formed in third recess 232 to the sealing washer, and the thickness of sealing washer equals with the degree of depth of third recess 232, compares and directly coats the sealing washer and form the sealing washer of film shape, can allow to produce certain relative movement between the first lens 21 of this kind of mode bonding and the second lens 23 to have better shock resistance ability, and also have certain tolerance to the expend with heat and contract with cold that the temperature variation arouses, therefore also possess wider service temperature range.

In an embodiment, the first lens 21 and the second lens 23 may be configured as concave lenses, and the first lens 21 and the second lens 23 may each be configured as concave lenses, or one of them may be configured as concave lenses. At least one of the first lens 21 and the second lens 23 may be an aspherical lens, and the above refractive requirements may be achieved by adjusting the curvature formula of the aspherical lens, and adverse phenomena such as unclear image, distortion of vision, narrow field of view, etc. may be improved, thereby improving imaging quality.

The embodiment of the utility model also provides a shooting device, which comprises shooting equipment and the protective shell 100, wherein the shooting equipment is accommodated in the accommodating cavity 11 of the protective shell 100. The photographing device has structural features and advantageous effects of the shield case 100, and technical details not described in detail in the photographing device embodiment may be referred to the shield case 100 of the above embodiment.

It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.

Claims (12)

1. A protective shell, comprising:

the shell structure is provided with an accommodating cavity and a view finding window communicated with the accommodating cavity; and

the light transmission part is arranged on the view finding window and comprises a first lens and a second lens arranged on one side, facing the corresponding view finding window, of the first lens, the second lens covers the view finding window, the first lens is provided with a light inlet surface and a light outlet surface which are arranged oppositely, the second lens is provided with an outer refraction surface and a light outlet surface which are arranged oppositely, and the inner refraction surface and the light outlet surface face the view finding window;

wherein a heat insulation cavity is formed between the inner refractive surface and the outer refractive surface, and the average curvature of the inner refractive surface is larger than that of the outer refractive surface.

2. The protective shell of claim 1, wherein the protective shell comprises a plurality of layers,

the edge of the first lens and the edge of the second lens are mutually attached to each other to enclose and form the heat insulation cavity.

3. The protective shell of claim 2, wherein the protective shell comprises a plurality of layers,

the light incident surface is a convex surface, the inner refraction surface is a concave surface, the outer refraction surface is a convex surface, and the light emergent surface is a concave surface;

and/or at least one of the light incident surface, the inner refraction surface, the outer refraction surface and the light emergent surface is an aspheric surface.

4. The protective housing of claim 1, wherein the insulating cavity is sealingly disposed, the insulating cavity having a lower thermal conduction efficiency than the first lens and/or the second lens.

5. The shield according to claim 4, wherein the projection of the second lens is located within the projection of the first lens in the optical axis direction of the light transmitting portion.

6. The protective housing according to any one of claims 1 to 5, wherein the housing chamber is a sealed chamber, and the light-transmitting portion is hermetically disposed in the viewfinder window.

7. The protective housing of claim 1, wherein the protective housing comprises a plurality of layers,

a first matching part is arranged on one side of the first lens, facing the shell structure, a first mounting part is arranged on one side of the shell structure, facing the first lens, and the first matching part is matched with the first mounting part so that the first lens seals the view finding window;

and/or, a second matching part is arranged on one side of the second lens, facing the shell structure, a second installation part is arranged on one side of the shell structure, facing the second lens, and the second matching part is matched with the second installation part so that the second lens seals the view finding window.

8. The protective housing of claim 7, wherein the protective housing comprises a plurality of layers,

the first matching part is an annular first convex rib, the first mounting part is a first groove surrounding the second lens, and the first convex rib is inserted into the first groove;

and/or the second matching part is a ring-shaped second convex rib, the second mounting part is a second groove surrounding the view finding window, and the second convex rib is inserted into the second groove.

9. The protective housing of claim 1, wherein the protective housing comprises a plurality of layers,

an annular third groove is formed in one side, facing the first lens, of the second lens, and sealant is arranged in the third groove to seal the heat insulation cavity.

10. The protective housing according to any one of claims 1 to 5, wherein the effective light entrance aperture of the incident surface of the first lens is higher than the outer surface of the housing structure in a direction radially outward of the optical axis of the light-transmitting portion, the angle between the outgoing light ray and the incoming light ray is smaller than a first predetermined angle, and the incident point of the incoming light ray is higher than the outgoing point of the outgoing light ray in a direction radially outward of the optical axis.

11. The protective housing of claim 10, wherein the first optic is provided with a raised portion connected to the housing structure or the housing structure is provided with a raised portion connected to the first optic.

12. A photographing apparatus comprising a photographing device and the protective casing according to any one of claims 1 to 11, wherein the photographing device is accommodated in an accommodating chamber of the protective casing.