Underwater 45-degree eyepiece with adjustable diopter

Abstract

The utility model discloses an underwater 45-degree eyepiece with adjustable diopter, and belongs to the field of underwater photographic equipment. Comprising a shell, an incident lens group, a prism, an emergent lens group and a diopter adjusting mechanism are arranged on the shell, an incident hole and an emergent hole are formed in the shell, and the incident lens group is arranged in front of the prism and arranged on the incident hole; the emergent lens group is arranged above the side of the prism and is arranged on the emergent hole, and the prism is positioned between the incident lens group and the emergent lens group; external light rays enter from the incidence hole, sequentially pass through the incidence lens group, the prism and the emergence lens group and then exit from the emergence hole, and the included angle between the normal of the incidence hole and the normal of the emergence hole is 45 degrees; the diopter adjusting mechanism comprises an adjusting knob and a transmission assembly. A photographer can rotate the adjusting knob outside the shell to drive the transmission assembly to work, so that the distance between the prism and the emergent lens group is adjusted, the diopter is further adjusted, and the photographer can conveniently adjust the diopter of the eyepiece underwater in real time.

Description

Technical Field

[0001] The utility model belongs to the field of underwater photography equipment, in particular to an underwater 45-degree eyepiece with adjustable diopter. Background Art

[0002] Underwater photography is a type of film and television stunt photography. The photographer carries a camera or camera with a waterproof protective cover and diving equipment to dive into the water to shoot. Underwater photography can truly reflect underwater scenes, such as underwater animals and plants, geological data such as the seabed and riverbed, and archaeological discoveries. Underwater photography has a wide range of applications in scientific research, military, sports, teaching, etc., and has gradually entered the lives of the public with the development of science and technology.

[0003] The eyepiece, also commonly called a viewfinder, is a device installed on a camera or camcorder for framing. It allows the photographer to preview the captured scene in real time and can help the photographer compose the picture.

[0004] The viewfinder system of a camera is usually provided with a diopter adjustment structure to compensate for the difference in the user's vision so that the composition effect can be clearly observed.

[0005] When taking photos underwater, the camera is placed in a waterproof shell to protect the camera from normal use underwater. Therefore, the camera viewfinder can only be viewed through a small window on the waterproof shell. Due to the presence of the camera waterproof shell and the diving mask, the distance between the camera viewfinder and the eye is 60 to 70 mm. Under normal circumstances, the viewing distance allowed by the camera's viewfinder eyepiece is 20 to 25 mm, so the photographer cannot see the whole picture from the viewfinder. Although we install an ordinary viewfinder on the small window so that the photographer can see the entire image from the viewfinder, the ordinary viewfinder has a small magnification, and the image is reduced, making it difficult to see the details, which is not conducive to focusing. In addition, due to the refraction of water and the presence of the diving mask, the diopter adjusted on land cannot be applied underwater, and the image seen from the viewfinder may be blurred.

[0006] The existing diopter adjustment structure of underwater cameras has the following adjustment method: first install the waterproof housing, look at the viewfinder, if it is not clear, remove it from the waterproof housing, and reinstall it after adjustment. If it is not clear, it needs to be removed and adjusted again. It has the following problems: the diopter cannot be adjusted in real time. Once the camera is installed in the waterproof housing, the diopter cannot be adjusted externally underwater. If there is a problem with the diopter adjustment, it must be readjusted on the surface, which has a very adverse effect on underwater shooting. It also makes it difficult for photographers with different vision to share equipment, affecting team shooting. Utility Model Content

[0007] In order to solve the above problems, the purpose of the utility model is to provide an underwater 45-degree eyepiece with adjustable diopter, which is convenient for adjusting the diopter of the eyepiece underwater.

[0008] To achieve the above purpose, the technical solution of the utility model is as follows:

[0009] The utility model provides an underwater 45-degree eyepiece with adjustable diopter, comprising: a shell, an incident lens group, a prism, an exit lens group and a diopter adjustment mechanism for adjusting the distance between the prism and the exit lens group are installed on the shell, an incident hole and an exit hole are arranged on the shell, the incident lens group is arranged in front of the prism and arranged on the incident hole; the exit lens group is arranged on the upper side of the prism and arranged on the exit hole, and the prism is located between the incident lens group and the exit lens group; external light enters from the incident hole and passes through the incident lens group, the prism, and the exit lens group in sequence, and then is emitted from the exit hole, and the angle between the normal line of the incident hole and the normal line of the exit hole is 45 degrees;

[0010] The diopter adjustment mechanism includes an adjustment knob and a transmission assembly. The adjustment knob is fixed to the housing and exposed outside the housing. The transmission assembly is installed inside the housing, and one end of the transmission assembly is connected to the adjustment knob, and the other end is connected to the output lens group.

[0011] In the present application, when the eyepiece is used underwater, the eyepiece is mounted on the eyepiece end of the camera housing, and light is incident from the incident hole horizontally from the front to the incident lens group, and then refracted by the incident lens group to enter the prism, and after multiple reflections through the prism, it is incident on the exit lens group at an angle of 45 degrees, and then emitted from the exit hole and enters the window at the eyepiece end of the camera, so that it is convenient for the photographer to take a horizontal view at a 45-degree depression angle; at the same time, the photographer can turn the adjustment knob outside the housing to drive the transmission assembly to adjust the distance between the prism and the exit lens group, and then adjust the diopter. The photographer can see the adjustment result in real time at the eyepiece end until a clear composition is seen, which can facilitate the photographer to adjust the diopter of the eyepiece in real time underwater.

[0012] Furthermore, the transmission assembly includes an active rotating shaft, an active wheel, and a driven wheel. The adjusting knob and the active wheel are respectively fixed on both ends of the active rotating shaft, and the driven wheel is meshed with the active wheel. A movable seat is movably provided in the exit hole, which is threadedly connected to the exit hole. The exit lens group is installed in the movable seat. A meshing gear is also provided on the side wall of the movable seat, and the meshing gear is meshed with the driven wheel. In the present application, when the adjusting knob outside the housing is turned, the active rotating shaft drives the active wheel to rotate, and then the driven wheel drives the movable seat to rotate. When the movable seat rotates, it will move relative to the exit hole through the threaded structure, driving the exit lens group to approach or move away from the prism to achieve the adjustment of the diopter.

[0013] Furthermore, the diopter adjustment mechanism also includes a diopter adjustment mounting seat, the shell is provided with a diopter adjustment mounting groove with an outer side open, the diopter adjustment mounting groove is connected with the exit hole, and the diopter adjustment mounting seat is installed on the diopter adjustment mounting groove; the diopter adjustment mounting seat is provided with a through hole and a limiting groove facing the exit hole, the through hole passes through the diopter adjustment mounting seat and is connected with the limiting groove, the driving wheel and the driven wheel are installed in the limiting groove, and the driving rotation shaft passes through the through hole; the adjustment knob is arranged on the outer side of the diopter adjustment mounting seat, so that the adjustment rotation is exposed outside the shell.

[0014] Furthermore, the driven wheel is a double-layer and parallel gear structure, the active rotating shaft is parallel to the gear of the driven wheel, the active wheel is vertically meshed with one layer of gears of the driven wheel, and the meshing gear is horizontally meshed with another layer of gears of the driven wheel; the diopter adjustment mechanism also includes a driven rotating shaft and an "L"-shaped gear fixing plate, the gear fixing plate is arranged in a limiting groove and fixedly connected to the diopter adjustment mounting seat; the active rotating shaft is passed through and fixed on one side of the "L"-shaped structure of the gear fixing plate; the driven wheel is sleeved on the driven rotating shaft, and the driven rotating shaft is passed through and fixed on the other side of the "L"-shaped structure of the gear fixing plate, so that the active wheel and the driven wheel are perpendicular.

[0015] In the present application, the "L"-shaped gear fixing plate can not only realize the installation and fixation of the active rotating shaft, the active wheel and the driven wheel, but also ensure that the active wheel and the driven wheel are perpendicular, so as to facilitate the horizontal twisting of the adjustment knob to be transmitted to the vertical movement of the movable seat, which is convenient for the photographer to adjust.

[0016] Furthermore, a sealing ring is sleeved on the active rotating shaft, and the sealing ring is tightly matched with the side wall of the through hole.

[0017] Furthermore, a clamping groove is also provided on the active rotating shaft, a clamping spring is installed on the clamping groove, and the clamping spring is clamped between the gear fixing plate and the inner wall of the limiting groove.

[0018] Furthermore, a prism cavity connected to the exit hole is also provided in the shell, the prism is installed in the prism cavity, and sealing covers are respectively provided on the left and right sides of the prism cavity, and the sealing covers are detachably connected to the shell.

[0019] Furthermore, a tubular camera connector is installed at the end of the housing, the incident hole runs through the camera connector, the camera connector is connected to the prism cavity, a fixing ring is installed in the camera connector, the camera connector and the fixing ring form a mounting position, and the incident lens group is arranged at the mounting position. In the present application, the fixing ring is connected to the camera connector by means of threaded connection, etc., the incident lens group is arranged at the mounting position and locked by the fixing ring, which is convenient for installation and disassembly.

[0020] Furthermore, the camera connector is also provided with a locking ring, and when the camera connector is connected to the eyepiece end of the camera, it can be locked by the locking ring.

[0021] Furthermore, a sealing port is provided at the end of the emission hole, and a sealing glass and a limiting ring are installed on the sealing port, the limiting ring is threadedly connected to the inner wall of the sealing port, the sealing glass is locked to the sealing port by the limiting ring, and a sealing ring is provided between the sealing glass and the inner wall of the sealing port. In the present application, the sealing glass can ensure both the smooth emission of light and the sealing effect.

[0022] Furthermore, the incident lens group is a glued lens, the prism is a roof prism, and the output lens group includes a glued lens and a single convex lens, wherein the glued lens is located between the roof prism and the single convex lens. The glued lens is a lens formed by gluing a double convex lens and a concave-convex lens.

[0023] Compared with the prior art, the beneficial effects of the utility model are: the photographer can rotate the adjustment knob outside the shell, and drive the transmission component to work through the adjustment knob, so as to adjust the distance between the prism and the output lens group, and then adjust the diopter. The photographer can see the adjustment result in real time at the eyepiece end until a clear composition is seen, which can facilitate the photographer to adjust the diopter of the eyepiece in real time underwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of this embodiment.

[0025] Figure 2 is an exploded view of this embodiment.

[0026] Figure 3It is a cross-sectional view of this embodiment.

[0027] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0028] Figure 5 It is a structural schematic diagram of the diopter adjustment mechanism.

[0029] Figure 6 Schematic diagram of the propagation direction of light in this embodiment. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] To achieve the above purpose, the technical solution of the utility model is as follows:

[0032] See also Figure 1-6 As shown, this embodiment provides an underwater 45-degree eyepiece with adjustable diopter, comprising: a shell 1, on which an incident lens group 2, a prism 3, an exit lens group 4 and a diopter adjustment mechanism 5 for adjusting the distance between the prism 3 and the exit lens group 4 are mounted, an incident hole 6 and an exit hole 7 are arranged on the shell 1, the incident lens group 2 is arranged in front of the prism 3 and arranged on the incident hole 6; the exit lens group 4 is arranged on the upper side of the prism 3 and arranged on the exit hole 7, and the prism 3 is located between the incident lens group 2 and the exit lens group 4; external light enters from the incident hole 6 and passes through the incident lens group 2, the prism 3, and the exit lens group 4 in sequence, and then exits from the exit hole 7, and the angle between the normal line of the incident hole 6 and the normal line of the exit hole 7 is 45 degrees;

[0033] The diopter adjustment mechanism 5 includes an adjustment knob 51 and a transmission assembly 52. ​​The adjustment knob 51 is fixed to the housing 1 and exposed outside the housing 1. The transmission assembly 52 is installed inside the housing 1, and one end of the transmission assembly 52 is connected to the adjustment knob 51, and the other end is connected to the output lens group 4.

[0034] In this embodiment, the incident lens group 2 is a laminated lens, the prism 3 is a roof prism, and the output lens group 4 includes an output laminated lens 41 and a single convex lens 42. The output laminated lens 41 is located between the roof prism and the single convex lens 42, and an isolation ring 43 is also provided between the output laminated lens 41 and the single convex lens 42. The laminated lens is a lens formed by bonding a double convex lens and a concave-convex lens. When the eyepiece is used underwater, the eyepiece is installed at the eyepiece end of the camera housing 1, and light is incident from the incident hole 6 horizontally from the front to the incident lens group 2, and then enters the prism 3 after being refracted by the incident lens group 2. After multiple reflections from the prism 3, it is incident on the exit lens group 4 at an angle of 45 degrees, and then is emitted from the exit hole 7 and enters the window at the eyepiece end of the camera, so that it is convenient for the photographer to take a horizontal view at a 45-degree depression angle; at the same time, the photographer can rotate the adjustment knob 51 outside the housing 1, and the transmission assembly 52 is driven by the adjustment knob 51 to adjust the distance between the prism 3 and the exit lens group 4, thereby adjusting the diopter. The photographer can see the adjustment result in real time at the eyepiece end until a clear composition is seen, which can facilitate the photographer to adjust the diopter of the eyepiece in real time underwater.

[0035] Further, the transmission assembly 52 includes an active rotating shaft 521, an active wheel 522, and a driven wheel 523. The adjusting knob 51 and the active wheel 522 are respectively sleeved and fixed on both ends of the active rotating shaft 521, and the driven wheel 523 is meshed with the active wheel 522. The housing 1 is provided with an emission hole 7, and a movable seat 8 is movably provided in the emission hole 7 and is connected to the emission hole 7 by threads. The emission lens group 4 is installed in the movable seat 8, and a meshing gear is also provided on the side wall of the movable seat 8, and the meshing gear is meshed with the driven wheel 523. In the present application, when the adjusting knob 51 outside the housing 1 is turned, the active rotating shaft 521 drives the active wheel 522 to rotate, and then the driven wheel 523 drives the movable seat 8 to rotate. When the movable seat 8 rotates, it will move relative to the emission hole 7 through the threaded structure, driving the emission lens group 4 to approach or move away from the prism 3 to achieve the adjustment of the diopter.

[0036] Furthermore, the diopter adjustment mechanism 5 also includes a diopter adjustment mounting seat 53, a diopter adjustment mounting groove 11 with an open outer side is provided on the shell 1, the diopter adjustment mounting groove 11 is connected with the exit hole 7, and the diopter adjustment mounting seat 53 is installed on the diopter adjustment mounting groove 11; the diopter adjustment mounting seat 53 is provided with a through hole 531 and a limiting groove 532 facing the exit hole 7, the through hole 531 passes through the diopter adjustment mounting seat 53 and is connected with the limiting groove 532, the driving wheel 522 and the driven wheel 523 are installed in the limiting groove 532, and the driving rotating shaft 521 passes through the through hole 531; the adjusting knob 51 is arranged on the outer side of the diopter adjustment mounting seat 53, so that the adjustment rotation is exposed outside the shell 1.

[0037] Furthermore, the driven wheel 523 is a double-layer and parallel gear structure, the active rotating shaft 521 is parallel to the gear of the driven wheel 523, the active wheel 522 is vertically meshed with one layer of gears of the driven wheel 523, and the meshing gear is horizontally meshed with another layer of gears of the driven wheel 523; the diopter adjustment mechanism 5 also includes a driven rotating shaft 524 and an "L"-shaped gear fixing plate 54, the gear fixing plate 54 is arranged in the limiting groove 532 and is fixedly connected to the diopter adjustment mounting seat 53; the active rotating shaft 521 is passed through and fixed on one side of the "L"-shaped structure of the gear fixing plate 54; the driven wheel 523 is sleeved on the driven rotating shaft 524, and the driven rotating shaft 524 is passed through and fixed on the other side of the "L"-shaped structure of the gear fixing plate 54, so that the active wheel 522 and the driven wheel 523 are perpendicular.

[0038] In the present application, the "L"-shaped gear fixing plate 54 can not only realize the installation and fixation of the active rotating shaft 521, the active wheel 522, and the driven wheel 523, but also ensure that the active wheel 522 and the driven wheel 523 are perpendicular to each other, so as to facilitate the horizontal twisting of the adjustment knob 51 to be transmitted to the vertical movement of the movable seat 8, so as to facilitate the adjustment by the shooting personnel.

[0039] Furthermore, a sealing ring is sleeved on the active rotating shaft 521 , and the sealing ring is tightly matched with the side wall of the through hole 531 .

[0040] Furthermore, a clamping groove 525 is provided on the active rotating shaft 521 , and a clamping spring 526 is installed on the clamping groove 525 . The clamping spring 526 is clamped between the gear fixing plate 54 and the inner wall of the limiting groove 532 .

[0041] Furthermore, a prism cavity 12 connected to the exit hole 7 is provided in the housing 1 , and a prism is installed in the prism cavity 12 . Sealing covers 9 are provided on the left and right sides of the prism cavity 12 , respectively, and the sealing covers 9 are detachably connected to the housing 1 .

[0042] Furthermore, a tubular camera connector 10 is installed at the end of the housing 1, and the incident hole 6 passes through the camera connector 10, the camera connector 10 is connected to the prism cavity 12, and a fixing ring 20 is installed in the camera connector 10. The camera connector 10 and the fixing ring 20 form a mounting position, and the incident lens group 2 is set at the mounting position. In the present application, the fixing ring 20 is connected to the camera connector 10 by means of threaded connection, etc., and the incident lens group 2 is set at the mounting position and locked by the fixing ring 20, which is convenient for installation and disassembly.

[0043] Furthermore, a locking ring 30 is sleeved on the camera connector 10 , and when the camera connector 10 is connected to the eyepiece end of the camera, it can be locked by the locking ring 30 .

[0044] Furthermore, a plug 60 is installed at the end of the camera connector 10 .

[0045] Furthermore, a sealing opening 13 is also provided at the end of the emission hole 7, and a sealing glass 40 and a limiting ring 50 are installed at the sealing opening 13, and the limiting ring 50 is threadedly connected to the inner wall of the sealing opening 13, and the sealing glass 40 is locked to the sealing opening 13 by the limiting ring 50, and a sealing ring is also provided between the sealing glass 40 and the inner wall of the sealing opening 13. In the present application, the sealing glass 40 can ensure both the smooth emission of light and the sealing effect.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An underwater 45-degree eyepiece with adjustable diopter, characterized in that: include: A housing, on which an incident lens group, a prism, an exit lens group and a diopter adjustment mechanism for adjusting the distance between the prism and the exit lens group are mounted, an incident hole and an exit hole are arranged on the housing, the incident lens group is arranged in front of the prism and on the incident hole; the exit lens group is arranged on the upper side of the prism and on the exit hole, and the prism is located between the incident lens group and the exit lens group; external light enters from the incident hole and passes through the incident lens group, the prism, and the exit lens group in sequence before being emitted from the exit hole, and the angle between the normal line of the incident hole and the normal line of the exit hole is 45 degrees; The diopter adjustment mechanism includes an adjustment knob and a transmission assembly. The adjustment knob is fixed to the housing and exposed outside the housing. The transmission assembly is installed inside the housing, and one end of the transmission assembly is connected to the adjustment knob, and the other end is connected to the output lens group.

2. The underwater 45-degree eyepiece with adjustable diopter as claimed in claim 1, characterized in that: The transmission assembly includes a driving rotating shaft, a driving wheel, and a driven wheel. The adjusting knob and the driving wheel are respectively sleeved and fixed on the two ends of the driving rotating shaft, and the driven wheel is meshed with the driving wheel. A movable seat is movably arranged in the emission hole and is penetrated from top to bottom. The movable seat is threadedly connected with the emission hole. The emission lens group is installed in the movable seat. A meshing gear is also arranged on the side wall of the movable seat, and the meshing gear is meshed with the driven wheel.

3. The underwater 45-degree eyepiece with adjustable diopter as claimed in claim 2, characterized in that: The diopter adjustment mechanism also includes a diopter adjustment mounting seat, the shell is provided with a diopter adjustment mounting groove with an outer side open, the diopter adjustment mounting groove is connected with the exit hole, and the diopter adjustment mounting seat is installed on the diopter adjustment mounting groove; the diopter adjustment mounting seat is provided with a through hole and a limiting groove facing the exit hole, the through hole passes through the diopter adjustment mounting seat and is connected with the limiting groove, the driving wheel and the driven wheel are installed in the limiting groove, and the driving rotation shaft passes through the through hole; the adjustment knob is arranged on the outer side of the diopter adjustment mounting seat, so that the adjustment rotation is exposed outside the shell.

4. The underwater 45-degree eyepiece with adjustable diopter as claimed in claim 3, characterized in that: The driven wheel is a double-layer and parallel gear structure, the active rotating shaft is parallel to the gear of the driven wheel, the active wheel is vertically meshed with one layer of gears of the driven wheel, and the meshing gear is horizontally meshed with another layer of gears of the driven wheel; the diopter adjustment mechanism also includes a driven rotating shaft and an "L"-shaped gear fixing plate, the gear fixing plate is arranged in a limiting groove and fixedly connected to the diopter adjustment mounting seat; the active rotating shaft is passed through and fixed on one side of the "L"-shaped structure of the gear fixing plate; the driven wheel is sleeved on the driven rotating shaft, and the driven rotating shaft is passed through and fixed on the other side of the "L"-shaped structure of the gear fixing plate, so that the active wheel and the driven wheel are perpendicular.

5. The underwater 45-degree eyepiece with adjustable diopter as claimed in claim 4, characterized in that: The active rotating shaft is also provided with a clamping groove, on which a clamping spring is installed, and the clamping spring is clamped between the gear fixing plate and the inner wall of the limiting groove.

6. The underwater 45-degree eyepiece with adjustable diopter as claimed in claim 2, characterized in that: A prism cavity connected to the emission hole is also provided in the shell, the prism is installed in the prism cavity, and sealing covers are respectively provided on the left and right sides of the prism cavity, and the sealing covers are detachably connected to the shell.

7. The underwater 45-degree eyepiece with adjustable diopter as claimed in claim 6, characterized in that: A tubular camera connector is also installed at the end of the shell, the incident hole passes through the camera connector, the camera connector is connected to the prism cavity, a fixing ring is installed in the camera connector, the camera connector and the fixing ring form a mounting position, and the incident lens group is arranged at the mounting position.

8. The underwater 45-degree eyepiece with adjustable diopter as claimed in claim 7, characterized in that: The camera connector is also sleeved with a locking ring.

9. The underwater 45-degree eyepiece with adjustable diopter as claimed in claim 2, characterized in that: A sealing port is also provided at the end of the emission hole, and a sealing glass and a limiting ring are installed on the sealing port. The limiting ring is threadedly connected to the inner wall of the sealing port, and the sealing glass is locked to the sealing port through the limiting ring. A sealing ring is also provided between the sealing glass and the inner wall of the sealing port.

10. The underwater 45-degree eyepiece with adjustable diopter as claimed in claim 1, characterized in that: The incident lens group adopts a glued lens, the prism adopts a roof prism, and the output lens group includes an output glued lens and a single convex lens; the output glued lens is located between the roof prism and the single convex lens, and an isolation ring is also provided between the output glued lens and the single convex lens.

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