Viewfinder for waterproof shell of camera

Abstract

The utility model relates to the technical field of underwater photography viewfinders, in particular to a viewfinder for a camera waterproof shell, which comprises a shell, an objective lens assembly, a prism assembly and an eyepiece assembly, and is characterized in that the shell is provided with a light inlet and a light outlet; the prism assembly is located in the shell and comprises a first prism and a second prism, the first prism and the second prism are respectively provided with a first reflecting surface and a second reflecting surface, and the first reflecting surface and the second reflecting surface respectively perform primary reflection and secondary reflection on the inverted real image generated by the objective lens assembly so as to deflect the position of the real image. The position of the deflected image rises, the eyepiece assembly is located on the upper side of the objective lens assembly, and the lower side space of the eyepiece assembly is released, so that the shell of the viewfinder is not easy to interfere with or shield the waterproof shell of the camera; when the viewfinder of the camera is imaged in an inverted state, the eyepiece end of the viewfinder of the waterproof shell of the camera outputs an upright image for composition.

Description

Technical Field

[0001] The present application relates to the technical field of underwater photography viewfinders, and in particular to a viewfinder for a waterproof housing of a camera. Background Art

[0002] The viewfinder itself is part of a professional camera. It is an auxiliary device used to help photographers select the range of scenery and help compose the picture, especially in outdoor sunlight. When taking pictures underwater, the camera is placed in a waterproof housing for protection. Therefore, the image of the internal camera viewfinder, composition and shooting can only be viewed through the viewfinder installed outside the camera's waterproof housing.

[0003] When a camera uses certain lenses or combinations, the image output by the camera display or viewfinder is inverted. For example, when a macro to wide-angle conversion lens is used without a relay lens, the image viewed through the existing camera waterproof housing viewfinder is an inverted image, which is not conducive to framing and taking pictures. In addition, some viewfinders used in camera waterproof housings are also provided with a diopter adjustment device, which can adjust the diopter in real time underwater until the human eye sees a clear image.

[0004] The viewfinder for a camera with a waterproof housing includes an eyepiece, an objective lens, and a connecting structure for connecting to the camera with a waterproof housing. When the viewfinder for a camera with a waterproof housing is connected to the camera with a waterproof housing through the connecting structure, the housing of the viewfinder is likely to interfere with the camera with a waterproof housing or block the camera display screen. Utility Model Content

[0005] The present application mainly solves the problem that when the viewfinder used in the waterproof housing of a camera is connected to the waterproof housing of the camera, the housing of the viewfinder is easily interfered with or blocked by the waterproof housing of the camera; when the image of the viewfinder of the camera is in an inverted state, the eyepiece end of the viewfinder used in the waterproof housing of the camera outputs an upright image for composing.

[0006] According to one aspect of the present application, an embodiment provides a viewfinder for a camera waterproof housing, comprising:

[0007] A housing, wherein a light inlet and a light outlet are provided on the housing;

[0008] An objective lens assembly, the objective lens assembly is arranged at the light entrance, and the objective lens assembly includes one or more optical lenses, which are used to refract the incident light and generate an inverted real image;

[0009] An eyepiece assembly, wherein the eyepiece assembly is arranged at the light exit, and the eyepiece assembly is staggered with the objective lens assembly in a direction perpendicular to the optical axis of the objective lens assembly;

[0010] A prism assembly, wherein the prism assembly is arranged inside the shell, and the prism assembly includes a first prism and a second prism, wherein the first prism and the second prism are respectively provided with a first reflecting surface and a second reflecting surface, wherein the first reflecting surface is arranged corresponding to the optical axis of the objective lens assembly, and the second reflecting surface is arranged corresponding to the optical axis of the eyepiece assembly, and the second reflecting surface is staggered with the first reflecting surface in a direction perpendicular to the optical axis of the objective lens assembly, and the first reflecting surface and the second reflecting surface can respectively reflect the inverted real image once and twice so that the real image enters the eyepiece assembly.

[0011] In some embodiments, the first prism is arranged corresponding to the objective lens assembly, the first prism is a right-angle prism, the cross-sectional shape of the right-angle prism is an isosceles right triangle, the first prism has two vertical surfaces and one inclined surface, one of the vertical surfaces of the first prism is arranged opposite to the objective lens assembly, a reflective layer is arranged on the inclined surface, and the inclined surface constitutes the first reflective surface.

[0012] In some embodiments, the second prism is a right-angle prism, and the cross-sectional shape of the right-angle prism is an isosceles right triangle. The second prism has two vertical surfaces and one inclined surface. One of the vertical surfaces of the second prism is arranged opposite to the eyepiece assembly, and the inclined surface is provided with a reflective layer. The inclined surface constitutes the second reflective surface, and the second reflective surface is parallel to the first reflective surface. The optical axis of the eyepiece assembly is parallel to the optical axis of the objective lens assembly.

[0013] In some embodiments, the optical axis of the eyepiece assembly is tilted relative to the optical axis of the objective lens assembly.

[0014] In some embodiments, the second prism is a trapezoidal prism having an upper base surface, a lower base surface, and two waist surfaces, wherein one waist surface is arranged opposite to the eyepiece assembly, and the other waist surface is arranged opposite to the vertical surface of the first prism, and the lower base surface is provided with a reflective layer, and the lower base surface constitutes the second reflective surface.

[0015] In some embodiments, the viewfinder for the camera waterproof housing includes a prism fixing frame, which is fixedly connected to the housing, and has a first card slot and a second card slot, and the first card slot and the second card slot are used to fix the first prism and the second prism respectively.

[0016] In some embodiments, the prism fixing frame includes a main frame body and a connecting portion, the first card slot and the second card slot are arranged on the main frame body, and the connecting portion is fixedly connected to the shell.

[0017] In some embodiments, the shell includes a main shell and a cover body, the main shell is provided with a prism mounting cavity, the prism mounting cavity has a mounting opening for the prism assembly to be installed, and the cover body is sealed on the mounting opening.

[0018] In some embodiments, the connecting portion is a connecting flange, and the connecting flange is fixed to the bottom wall of the prism mounting cavity by fasteners, and the fasteners are arranged along the depth direction of the prism mounting cavity.

[0019] In some embodiments, the prism fixing frame includes a first frame body and a second frame body, the first card slot is disposed on the first frame body, and the second card slot is disposed on the second frame body.

[0020] According to the viewfinder for the waterproof housing of the camera in the above embodiment, the first reflection surface and the second reflection surface of the prism assembly are staggered in a direction perpendicular to the optical axis of the objective lens assembly, and the inverted image finally reaches the eyepiece assembly after the first reflection and the second reflection of the prism assembly; the eyepiece assembly and the objective lens assembly are staggered in a direction perpendicular to the optical axis of the objective lens assembly; the image deflection angle can be adjusted by adjusting the positions of the first prism and the second prism, so that the arrangement position of the eyepiece assembly can be flexibly arranged to better suit the different framing postures of the photographer. Furthermore, when the viewfinder of the camera is in an inverted state, since the objective lens assembly can produce an inverted real image, that is, the image is inverted again, so that the eyepiece assembly outputs an upright image for composition. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A stereoscopic view of an embodiment of a viewfinder for a camera waterproof housing in the utility model;

[0022] Figure 2 for Figure 1 An exploded view of a viewfinder for a waterproof camera housing;

[0023] Figure 3 for Figure 1 A cross-sectional view of a viewfinder for a waterproof camera housing;

[0024] Figure 4 for Figure 1 An optical path diagram of a prism assembly for a viewfinder of a camera waterproof housing;

[0025] Figure 5 A stereoscopic view of an embodiment of a viewfinder for a camera waterproof housing in the utility model;

[0026] Figure 6 for Figure 5 An exploded view of a viewfinder for a waterproof camera housing;

[0027] Figure 7 for Figure 5 A cross-sectional view of a viewfinder for a waterproof camera housing;

[0028] Figure 8 for Figure 5 An optical path diagram of a prism assembly for a viewfinder of a camera waterproof housing.

[0029] Reference numerals:

[0030] 1. Shell; 11. Light inlet; 12. Light outlet; 2. Objective lens assembly; 21. Glued convex lens; 3. Prism assembly; 31. First prism; 311. First reflecting surface; 32. Second prism; 321. Second reflecting surface; 4. Eyepiece assembly; 5. Prism fixing frame; 51. Main frame; 52. Connecting part; 53. Fastener. DETAILED DESCRIPTION

[0031] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0032] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0033] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0034] like Figure 1 , Figure 5 As shown, the viewfinder for a waterproof housing of a camera according to an embodiment of the utility model comprises: a housing 1 , an objective lens assembly 2 , an eyepiece assembly 4 and a prism assembly 3 .

[0035] A light inlet 11 and a light outlet 12 are provided on the shell 1; the objective lens assembly 2 is provided at the light inlet 11, and the objective lens assembly 2 includes one or more optical lenses for refracting incident light and generating an inverted real image; the eyepiece assembly 4 is provided at the light outlet 12, and the eyepiece assembly 4 is staggered with the objective lens assembly 2 in a direction perpendicular to the optical axis of the objective lens assembly 2.

[0036] like Figure 2 , Figure 3 As shown, the housing 1 may be composed of a main housing and a cover, the objective lens assembly 2 is arranged at the front side of the housing 1, the eyepiece assembly 4 is arranged at the rear side of the housing 1, the objective lens assembly 2 and the eyepiece assembly 4 are arranged staggered up and down, and the prism assembly 3 is fixed in the main housing and located between the objective lens assembly 2 and the eyepiece assembly 4. The objective lens assembly may be composed of a cemented convex lens 21, and when the image of the viewfinder of the camera is in an inverted state, the cemented convex lens 21 can invert the image again, so that the photographer can see an upright image from the eyepiece assembly 4.

[0037] In other embodiments, the objective lens assembly 2 may also be formed by gluing or assembling a plurality of optical lenses, and the plurality of optical lenses are equivalent to a convex lens.

[0038] The prism assembly 3 is arranged inside the shell 1, and the prism assembly 3 includes a first prism 31 and a second prism 32. The first prism 31 and the second prism 32 are respectively provided with a first reflecting surface 311 and a second reflecting surface 321. The first reflecting surface 311 is arranged corresponding to the optical axis of the objective lens assembly 2, and the second reflecting surface 321 is arranged corresponding to the optical axis of the eyepiece assembly 4. In the direction perpendicular to the optical axis of the objective lens assembly 2, the second reflecting surface 321 is staggered with the first reflecting surface 311. The first reflecting surface 311 and the second reflecting surface 321 can respectively reflect the inverted real image once and twice to allow the real image to enter the eyepiece assembly 4.

[0039] Specifically, the second prism 32 is located above the first prism 31, and the first reflecting surface 311 and the second reflecting surface 321 are staggered in an upper and lower manner. The first reflecting surface 311 first deflects the image upward, and the second reflecting surface 321 further deflects the image toward the eyepiece assembly 4. The position of the image after deflection rises, and the eyepiece assembly 4 is located on the upper side of the objective lens assembly 2. The lower space of the eyepiece assembly 4 is released, and the shell 1 of the viewfinder of the camera waterproof shell is not easy to interfere with the waterproof shell or block the camera display screen.

[0040] According to the viewfinder for the waterproof housing of the camera in the above embodiment, the first reflection surface 311 and the second reflection surface 321 of the prism assembly 3 are staggered in the direction perpendicular to the optical axis of the objective lens assembly 2, and the image finally reaches the eyepiece assembly 4 after the primary reflection and secondary reflection of the prism assembly 3; the eyepiece assembly 4 and the objective lens assembly 2 are staggered in the direction perpendicular to the optical axis of the objective lens assembly 2; the position below the eyepiece assembly 4 is vacated, and the housing 1 of the viewfinder is not easy to interfere with the waterproof housing. The angle of image deflection can be adjusted by adjusting the positions of the first prism 31 and the second prism 32, so that the arrangement position of the eyepiece assembly 4 can be flexibly arranged to better suit the different framing postures of photographers.

[0041] In some embodiments, Figure 2-Figure 4 , Figure 6-Figure 8 As shown, the first prism 31 is arranged corresponding to the objective lens assembly 2. The first prism 31 is a right-angle prism. The cross-sectional shape of the right-angle prism is an isosceles right triangle. The first prism 31 has two vertical surfaces and one inclined surface. One of the vertical surfaces of the first prism 31 is arranged opposite to the objective lens assembly 2. A reflective layer is arranged on the inclined surface, and the inclined surface constitutes a first reflective surface 311.

[0042] Specifically, the reflective layer can be an optical film disposed on the inclined surface. The incident light enters through the vertical surface of the first right-angle prism, then reflects through the inclined surface, and emerges from another vertical surface. The first prism 31 can deflect the image upward by 90 degrees through one reflection.

[0043] In some embodiments, Figure 2-Figure 6 As shown, the second prism 32 is a right-angle prism, and the cross-sectional shape of the right-angle prism is an isosceles right triangle. The second prism 32 has two vertical surfaces and one inclined surface. One of the vertical surfaces of the second prism 32 is arranged directly opposite the eyepiece assembly 4. The inclined surface is provided with a reflective layer. The inclined surface constitutes a second reflective surface 321. The second reflective surface 321 is parallel to the first reflective surface 311. The optical axis of the eyepiece assembly 4 is parallel to the optical axis of the objective lens assembly 2.

[0044] In the above arrangement, the first prism 31 can deflect the image upward by 90 degrees after one reflection, and the image reaches the second prism 32 after deflection, and the second prism 32 deflects the image rightward by 90 degrees, and the deflected image is emitted from the eyepiece assembly 4. The eyepiece assembly 4 is located on the upper side of the objective lens assembly 2, and the position on the lower side of the eyepiece assembly 4 is vacant, which can play the effect of avoiding the camera display screen or other components.

[0045] In some embodiments, the optical axis of the eyepiece assembly 4 is inclined to the optical axis of the objective lens assembly 2. Specifically, according to the different positional relationships between the first prism 31 and the second prism 32 in the prism assembly 3, the optical axis of the objective lens assembly 2 and the optical axis of the eyepiece assembly 4 may be at a certain angle, such as a 45 degree angle.

[0046] In some embodiments, Figure 6-Figure 8 As shown, the second prism 32 is a trapezoidal prism having an upper bottom surface, a lower bottom surface and two waist surfaces, one of which is arranged opposite to the eyepiece assembly 4, and the other waist surface is arranged opposite to the vertical surface of the first prism 31, and the lower bottom surface is provided with a reflective layer, which constitutes a second reflective surface 321.

[0047] In the above arrangement, the first prism 31 can deflect the image upward by 90 degrees after one reflection, and the image reaches the second prism 32 after deflection, and the second prism 32 deflects the image to the right by 45 degrees, and the deflected image is emitted from the eyepiece assembly 4. At this time, the eyepiece assembly 4 and the objective lens assembly 2 form an angle of 45 degrees. When taking photos underwater, the photographer can look down to see the scenery in front through the photographic equipment without moving the entire photographic equipment to the same level as the field of view. It is suitable for taking photos and composing pictures close to the ground, and can reduce the burden of photography enthusiasts.

[0048] In some embodiments, Figure 2 , Figure 6 As shown, the viewfinder for the camera waterproof housing includes a prism fixing frame 5, which is fixedly connected to the housing 1. The prism fixing frame 5 has a first card slot and a second card slot, which are used to fix the first prism 31 and the second prism 32 respectively.

[0049] Specifically, the second card slot is located on the upper side of the first card slot, the shape of the first card slot is adapted to the shape of the first prism 31, and the shape of the second card slot is adapted to the shape of the second prism 32. The first prism 31 and the second prism 32 can be respectively inserted into the first card slot and the second card slot, and are fixed by glue or the like. A prism fixing frame 5 is provided to facilitate fixing the prism assembly 3.

[0050] In some embodiments, Figure 2 , Figure 6 As shown, the prism fixing frame 5 includes a main frame body 51 and a connecting portion 52, a first card slot and a second card slot are provided on the main frame body 51, and the connecting portion 52 is fixedly connected to the housing 1. Specifically, the connecting portion 52 can be located on one side of the main frame body 51 and is an integral structure with the main frame body 51. The connecting portion 52 is provided to facilitate the fixed connection of the prism fixing frame 5 to the housing 1.

[0051] In some embodiments, Figure 2 , Figure 6 As shown, the housing 1 includes a main shell and a cover body. The main shell is provided with a prism mounting cavity. The prism mounting cavity has a mounting opening for the prism assembly 3 to be installed. The cover body is sealed on the mounting opening.

[0052] In some embodiments, the connection portion 52 is a connection flange, which is fixed to the bottom wall of the prism mounting cavity by a fastener 53, and the fastener 53 is arranged along the depth direction of the prism mounting cavity. Specifically, the fastener 53 is a fastening screw, and a fixing hole is arranged on the connection flange, and the fastening screw passes through the fixing hole to fix the prism fixing frame 5 to the main shell.

[0053] In other embodiments, the prism fixing frame 5 and the main shell may be fixed by bonding or clamping, or the prism assembly 3 may be directly fixedly connected to the shell 1 .

[0054] In some embodiments, Figure 2 As shown, the prism fixing frame 5 includes a first frame body and a second frame body, the first card slot is set in the first frame body, and the second card slot is set in the second frame body. Specifically, the first prism 31 is assembled in the first card slot, and the second prism 32 is assembled in the second card slot. The first frame body and the second frame body are used to fix the first prism 31 and the second prism 32 respectively.

[0055] In other embodiments, the first frame and the second frame may also be an integrated structure.

[0056] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A viewfinder for a waterproof camera housing, characterized in that: include: A housing, wherein a light inlet and a light outlet are provided on the housing; An objective lens assembly, the objective lens assembly is arranged at the light entrance, and the objective lens assembly includes one or more optical lenses, which are used to refract the incident light and generate an inverted real image; An eyepiece assembly, wherein the eyepiece assembly is arranged at the light exit, and the eyepiece assembly is staggered with the objective lens assembly in a direction perpendicular to the optical axis of the objective lens assembly; A prism assembly, wherein the prism assembly is arranged inside the shell, and the prism assembly includes a first prism and a second prism, wherein the first prism and the second prism are respectively provided with a first reflecting surface and a second reflecting surface, wherein the first reflecting surface is arranged corresponding to the optical axis of the objective lens assembly, and the second reflecting surface is arranged corresponding to the optical axis of the eyepiece assembly, and the second reflecting surface is staggered with the first reflecting surface in a direction perpendicular to the optical axis of the objective lens assembly, and the first reflecting surface and the second reflecting surface can respectively reflect the inverted real image once and twice so that the real image enters the eyepiece assembly.

2. The viewfinder for a camera waterproof housing according to claim 1, characterized in that: The first prism is arranged corresponding to the objective lens assembly, the first prism is a right-angle prism, and the cross-sectional shape of the right-angle prism is an isosceles right triangle. The first prism has two vertical surfaces and one inclined surface, one of the vertical surfaces of the first prism is arranged opposite to the objective lens assembly, a reflective layer is arranged on the inclined surface, and the inclined surface constitutes the first reflective surface.

3. The viewfinder for a camera waterproof housing according to claim 2, characterized in that: The second prism is a right-angle prism, and the cross-sectional shape of the right-angle prism is an isosceles right triangle. The second prism has two vertical surfaces and one inclined surface. One of the vertical surfaces of the second prism is arranged directly opposite to the eyepiece assembly. The inclined surface is provided with a reflective layer. The inclined surface constitutes the second reflective surface. The second reflective surface is parallel to the first reflective surface. The optical axis of the eyepiece assembly is parallel to the optical axis of the objective lens assembly.

4. The viewfinder for a camera waterproof housing according to claim 2, characterized in that: The optical axis of the eyepiece assembly is inclined to the optical axis of the objective lens assembly.

5. The viewfinder for a camera waterproof housing according to claim 4, characterized in that: The second prism is a trapezoidal prism having an upper bottom surface, a lower bottom surface and two waist surfaces, one of which is arranged opposite to the eyepiece assembly, and the other waist surface is arranged opposite to the vertical surface of the first prism, and the lower bottom surface is provided with a reflective layer, and the lower bottom surface constitutes the second reflective surface.

6. The viewfinder for a camera waterproof housing according to any one of claims 1 to 5, characterized in that: It comprises a prism fixing frame, which is fixedly connected to the housing, and has a first card slot and a second card slot, wherein the first card slot and the second card slot are respectively used to fix the first prism and the second prism.

7. The viewfinder for a camera waterproof housing according to claim 6, characterized in that: The prism fixing frame includes a main frame body and a connecting portion, the first card slot and the second card slot are arranged on the main frame body, and the connecting portion is fixedly connected to the shell.

8. The viewfinder for a camera waterproof housing according to claim 7, characterized in that: The shell comprises a main shell and a cover body. The main shell is provided with a prism installation cavity. The prism installation cavity has an installation opening for the prism assembly to be installed. The cover body is sealed on the installation opening.

9. The viewfinder for a camera waterproof housing according to claim 8, characterized in that: The connecting portion is a connecting flange, and the connecting flange is fixed to the bottom wall of the prism mounting cavity by a fastener, and the fastener is arranged along the depth direction of the prism mounting cavity.

10. The viewfinder for a camera waterproof housing according to claim 6, characterized in that: The prism fixing frame includes a first frame body and a second frame body, the first card slot is arranged on the first frame body, and the second card slot is arranged on the second frame body.

Images