Large-field-of-view Porro-type binocular independent focusing telescope

Abstract

The invention provides a large-field-of-view Porro-type binocular independent focusing telescope which comprises two telescope bodies, an objective lens, an ocular lens, a connecting shaft and an automatic focusing mechanism. An objective lens and an ocular lens are respectively mounted at two ends of the lens bodies, and the two lens bodies are rotationally connected through a connecting shaft; the eyepiece comprises a focusing sleeve, a lens frame and a lens installed in the lens frame, the focusing sleeve is rotationally installed on a connecting cylinder arranged at the end of the lens body through a bearing, and the lens frame is installed in the focusing sleeve in a threaded mode; two fixing pieces are arranged on the side walls of the two lens bodies respectively and connected to the upper end and the lower end of the connecting shaft through bolts respectively. According to the eyepiece disclosed by the invention, the focusing sleeve is arranged to independently focus the two eyepieces, the focusing is convenient, the two eyepieces can be adjusted to a clear state, and the focal length of the eyepieces can be automatically adjusted through the automatic focusing mechanism; the focusing sleeve does not need to be rotated by hands for adjustment, and the convenience of focal length adjustment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of telescopes, and more specifically, to a large-field-of-view Porro prism binocular telescope with independent focusing for both eyes. Background Art

[0002] In Porro prism telescopes, since total internal reflection can occur on all four reflecting surfaces and there is no loss of light, the imaging effect is good, the field of view is clearer and more transparent, and the structure is strong and the durability is good, which is popular among a large number of travel enthusiasts. Currently, when focusing a Porro prism telescope, a central focusing knob is usually used to focus the two eyepieces 3 simultaneously. When the distances between the two barrels are adjusted according to the user, the focal planes of the two barrels change, and it is difficult to adjust both barrels to a clear state using the central focusing knob; existing Porro prism telescopes usually use manual focusing, which is rather time-consuming and laborious, and it is difficult to grasp the focal position accurately when manually controlling for precise focusing. Summary of the Invention

[0003] In order to overcome the problems existing in the background art, the present invention provides a large-field-of-view Porro prism binocular telescope with independent focusing for both eyes to solve the technical problems in the background art that the current central focusing of Porro prism telescopes is inconvenient and manual focusing is time-consuming and laborious. In the present invention, the eyepiece 3 is focused separately for the two eyepieces 3 by setting a focusing sleeve 6, which is convenient for focusing and enables both eyepieces 3 to be adjusted to a clear state. The automatic focusing mechanism 5 can automatically adjust the focal length of the eyepiece 3, and there is no need to manually rotate the focusing sleeve 6 for adjustment, which improves the convenience of focal length adjustment and also improves the accuracy of focal length adjustment.

[0004] To achieve the above object, the present invention is realized through the following technical solutions: A large-field-of-view Porro prism binocular telescope with independent focusing for both eyes, comprising two barrels 1, an objective lens 2, an eyepiece 3, a connecting shaft 4, and an automatic focusing mechanism 5; the two ends of the barrel 1 are respectively provided with an objective lens 2 and an eyepiece 3, and the two barrels 1 are rotatably connected by a connecting shaft 4; the eyepiece 3 includes a focusing sleeve 6, a lens frame 7, and a lens 8 installed in the lens frame 7. The focusing sleeve 6 is rotatably installed on a connecting cylinder 9 provided at the end of the barrel 1 through a bearing, and the lens frame 7 is threadedly installed in the focusing sleeve 6; two fixing pieces 10 are respectively provided on the side walls of the two barrels 1, and the two fixing pieces 10 are respectively connected to the upper and lower ends of the connecting shaft 4 by bolts; the bolt connected to the upper end of the connecting shaft 4 is a hollow bolt 11 that penetrates up and down and is communicated with the cavity provided inside the connecting shaft 4. A micro motor 12 is installed in the cavity inside the connecting shaft 4, and the output shaft 17 of the micro motor 12 extends out from the hollow bolt 11 and is in transmission connection with the automatic focusing mechanism 5 installed on the hollow bolt 11. A transmission tooth 14 is provided on the outer wall of the focusing sleeve 6 and is in transmission connection with the automatic focusing mechanism 5.

[0005] Preferably, the automatic focusing mechanism 5 includes a fixed frame 15 and a gear transmission group 16 installed inside the fixed frame 15. The gear transmission group 16 drives and connects the output shaft 17 of the micro motor 12 and the transmission teeth 14 on the focusing sleeve 6.

[0006] Preferably, the gear transmission group 16 includes two reduction gears 18 drivingly connected to the output shaft 17 of the micro motor 12, a coarse adjustment gear 19 and a fine adjustment gear 20 coaxially connected to the reduction gears 18 through connecting rods, two output gears 21 respectively connected to the coarse adjustment gear 19 and the fine adjustment gear 20, and a control gear 22 installed at the top of the fixed frame 15 between the two output gears 21, selectively meshing with one of the two output gears 21 and meshing with the transmission teeth 14.

[0007] Preferably, the diameter of the coarse adjustment gear 19 is larger than that of the fine adjustment gear 20.

[0008] Preferably, the control gear 22 is rotatably installed on a control rod 23. The control rod 23 is installed in a sliding groove 26 provided on the inner wall of a window 25 provided on the top of the fixed frame 15 through a mounting disc 24. There is a mounting frame 27 provided on the top of the fixed frame 15. A side surface of a square block 28 provided on the control rod 23 is elastically connected to the inner wall of the mounting frame 27 through a spring 29.

[0009] Preferably, a battery 13 for supplying power to the micro motor 12 is provided inside the cavity of the connecting shaft 4. A start button for controlling the rotation of the micro motor 12 and a steering button for controlling the rotation direction of the micro motor 12 are provided on the side wall of the connecting shaft 4.

[0010] Preferably, a rib 30 is axially provided at the rear section of the lens frame 7. The rib 30 is slidably installed in a groove provided on the inner wall of the connecting cylinder 9. An annular boss 31 is provided at the front section of the lens frame 7 and is threadedly connected to the inner wall of the focusing sleeve 6.

[0011] Preferably, a dust-proof cover 32 made of a soft material is provided on the top of the mounting frame 27.

[0012] The beneficial effects of the present invention are as follows: The eyepiece of the present invention focuses the two eyepieces separately through the focusing sleeve, which is convenient for focusing and enables both eyepieces to be adjusted to a clear state. The automatic focusing mechanism can automatically adjust the focal length of the eyepiece, eliminating the need to manually rotate the focusing sleeve for adjustment, improving the convenience of focal length adjustment and also improving the accuracy of focal length adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0014] Figure 2 is a cross-sectional structural schematic diagram of the eyepiece.

[0015] Figure 3 It is a schematic diagram of the internal installation structure of the connecting shaft.

[0016] Figure 4 It is a schematic diagram of the structure of the automatic focusing mechanism.

[0017] Figure 5 It is a schematic diagram of the transmission structure of the gear transmission group.

[0018] Figure 6 It is a three-dimensional schematic diagram of the installation structure of the control gear.

[0019] Figure 7 It is a sectional schematic diagram of the installation structure of the control gear.

[0020] Figure 8 It is a schematic diagram of the dust cover. Detailed implementation manners

[0021] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate the understanding of those skilled in the art.

[0022] Such as Figure 1-8As shown, the present invention provides a large-field Paul-type binocular binocular independent focusing telescope, comprising two lens bodies 1, an objective lens 2, an eyepiece 3, a connecting shaft 4, and an automatic focusing mechanism 5; the objective lens 2 and the eyepiece 3 are respectively installed at both ends of the lens body 1, and the two lens bodies 1 are rotatably connected through the connecting shaft 4; the eyepiece 3 comprises a focusing sleeve 6, a lens frame 7 and a lens 8 installed in the lens frame 7, the focusing sleeve 6 is rotatably installed on a connecting sleeve 9 arranged at the end of the lens body 1 through a bearing, and the lens frame 7 is threadedly installed in the focusing sleeve 6; the two lens bodies 1 Two fixing plates 10 are respectively arranged on the side walls, and the two fixing plates 10 are respectively connected to the upper and lower ends of the connecting shaft 4 by bolts; the bolt connected to the upper end of the connecting shaft 4 is a hollow bolt 11 that penetrates from top to bottom and communicates with the cavity arranged inside the connecting shaft 4, a micro motor 12 is installed in the cavity inside the connecting shaft 4, and the output shaft 17 of the micro motor 12 extends from the hollow bolt 11 and is transmission-connected to the automatic focusing mechanism 5 installed on the hollow bolt 11, and the outer wall of the focusing sleeve 6 is provided with a transmission tooth 14 that is transmission-connected to the automatic focusing mechanism 5. When using the telescope, the distance between the two mirror bodies 1 is rotated by the connecting shaft 4 to adapt to the distance between the two eyes of the user, and each eyepiece 3 is provided with a focusing sleeve 6, and the focus of each eyepiece 3 can be adjusted separately by rotating the focusing sleeve 6; the automatic focusing mechanism 5 can also be driven to work by the micro motor 12, and the focusing sleeve 6 is rotated by the transmission of the automatic focusing mechanism 5 and the transmission tooth 14, so that the lens frame 7 moves, and then the focal length of the eyepiece 3 is adjusted. The eyepiece 3 is provided with a focusing sleeve 6 to focus the two eyepieces 3 separately, which is convenient for focusing, so that the two eyepieces 3 can be adjusted to a clear state. The focal length of the eyepiece 3 can be automatically adjusted through the automatic focusing mechanism 5, and there is no need to use the hand to rotate the focusing sleeve 6 for adjustment, which improves the convenience of focal length adjustment and also improves the accuracy of focal length adjustment.

[0023] like Figure 4 As shown, the automatic focusing mechanism 5 includes a fixed frame 15 and a gear transmission group 16 installed in the fixed frame 15, and the gear transmission group 16 transmits and connects the output shaft 17 of the micro motor 12 and the transmission teeth 14 on the focusing sleeve 6. The micro motor 12 drives the transmission teeth 14 on the focusing sleeve 6 to rotate through the gear transmission group 16, thereby driving the focusing sleeve 6 to rotate, and the focusing sleeve 6 rotates to adjust the focal length of the eyepiece 3, avoiding the use of manual adjustment and improving the convenience of focal length adjustment.

[0024] like Figure 5As shown in the figure, the gear transmission group 16 includes two reduction gears 18 that are drivingly connected to the output shaft 17 of the micro motor 12, a coarse adjustment gear 19 and a fine adjustment gear 20 that are coaxially connected to the reduction gear 18 through a connecting rod, two output gears 21 that are respectively connected to the coarse adjustment gear 19 and the fine adjustment gear 20, and a control gear 22 that is installed at the top of the fixed frame 15 between the two output gears 21 and selectively meshes with one of the two output gears 21 and meshes with the transmission teeth 14. The torque of the micro motor 12 is transmitted to the two reduction gears 18, and the torques of the two reduction gears 18 are respectively transmitted to the two eyepieces 3, causing the focusing sleeves 6 of the two eyepieces 3 to rotate. The diameter of the reduction gear 18 is larger than the diameter of the gear on the output shaft 17 of the micro motor 12, thereby reducing the rotational speed of the reduction gear 18 and increasing the torque, playing a role in speed reduction; the reduction gear 18 drives the coarse adjustment gear 19 and the fine adjustment gear 20 to rotate through a rotating shaft, and the coarse adjustment gear 19 and the fine adjustment gear 20 respectively drive the two output gears 21 to rotate at different speeds. At this time, by operating the control gear 22 to mesh with the two output gears 21 with different speeds and the transmission teeth 14 on the focusing sleeve 6, the focusing sleeve 6 is caused to rotate quickly and slowly, thereby performing coarse adjustment and fine adjustment on the focal length of the eyepiece 3.

[0025] As Figure 5 shown in the figure, the diameter of the coarse adjustment gear 19 is larger than the diameter of the fine adjustment gear 20. In the case of the same angular velocity, the larger the diameter, the greater the linear velocity. The coarse adjustment gear 19 and the fine adjustment gear 20 rotate coaxially, and their angular velocities are the same. The diameter of the coarse adjustment gear 19 is larger than the diameter of the fine adjustment gear 20. Therefore, the output speed of the coarse adjustment gear 19 is greater than that of the fine adjustment gear 20, thereby realizing the rotation of the focusing sleeve 6 at different speeds.

[0026] As Figures 6-7 shown in the figure, the control gear 22 is rotatably installed on the control rod 23. The control rod 23 is installed in a sliding groove 26 provided on the inner wall of a window 25 provided at the top of the fixed frame 15 through a mounting disc 24. An installation frame 27 is provided at the top of the fixed frame 15. A side surface of a square block 28 provided on the control rod 23 is elastically connected to the inner wall of the installation frame 27 through a spring 29. By installing the control rod 23 in the sliding groove 26 through the mounting disc 24, the control gear 22 can be horizontally moved without deviation, so that the control gear 22 meshes with the output gear 21. The provided spring 29 elastically supports the control around the control rod 23, keeping the control gear 22 between the two output gears 21. By moving the control rod 23 to both sides, the control gear 22 is moved to both sides and meshes with one of the output gears 21 and the transmission teeth 14, thereby realizing the coarse adjustment and fine adjustment of the focusing sleeve 6.

[0027] As Figure 3As shown, a battery 13 for supplying power to the micro-motor 12 is arranged in the cavity of the connecting shaft 4. An activation button for controlling the rotation of the micro-motor 12 and a steering button for controlling the rotation direction of the micro-motor 12 are arranged on the side wall of the connecting shaft 4. The battery 13 supplies power for the rotation of the micro-motor 12. The rotation of the micro-motor 12 is controlled by the activation button, and the rotation direction of the rotating shaft of the micro-motor 12 is controlled by the steering button, so as to control the rotation direction of the focusing sleeve 6, enabling the lens frame 7 to move in two directions, thus facilitating the adjustment of the focal length.

[0028] As Figure 2 shown, a rib 30 is axially arranged at the rear section of the lens frame 7. The rib 30 is slidably installed in a groove provided on the inner wall of the connecting cylinder 9. An annular boss 31 is arranged at the front section of the lens frame 7 and is threadedly connected to the inner wall of the focusing sleeve 6. When the focusing sleeve 6 rotates, the focusing sleeve 6 and the lens frame 7 rotate relative to each other through the thread. The lens frame 7 is slidably connected to the groove in the connecting cylinder 9 through the rib 30 arranged thereon in the front and rear directions, thereby preventing the lens frame 7 from rotating and enabling the lens frame 7 to move back and forth, thus realizing the adjustment of the focal length. The focal length of the eyepiece 3 can be conveniently adjusted through the focusing sleeve 6.

[0029] As Figure 8 shown, a dust-proof cover 32 made of a soft material is arranged at the top of the mounting frame 27. The dust-proof cover 32 can protect the spring 29, the control rod 23 and the control gear 22 in the mounting frame 27, preventing the deposited dust from damaging the working elements in the mounting frame 27. At the same time, the use of a soft material does not affect the movement of the control rod 23.

[0030] Working process: When using this telescope, the distance between the two lens bodies 1 is adjusted by rotating through the connecting shaft 4 so as to adapt to the distance between the user's two eyes. Each eyepiece 3 is provided with a focusing sleeve 6, and the focal length of each eyepiece 3 can be adjusted individually by rotating the focusing sleeve 6. The automatic focusing mechanism 5 can also be driven to work by the micro motor 12. The micro motor 12 drives the transmission tooth 14 on the focusing sleeve 6 to rotate through the gear transmission group 16. The micro motor 12 drives the reduction gear 18 to rotate. The reduction gear 18 drives the coarse adjustment gear 19 and the fine adjustment gear 20 to rotate through the rotating shaft. The coarse adjustment gear 19 and the fine adjustment gear 20 drive the two output gears 21 to rotate at different speeds respectively, move the control rod 23 to both sides, move the control gear 22 to both sides, and engage with one of the output gears 21 and the transmission tooth 14, so as to realize the coarse adjustment and fine adjustment of the focusing sleeve 6. When the focusing sleeve 6 rotates, the focusing sleeve 6 and the lens frame 7 rotate relatively through the thread. The lens frame 7 is slidably connected to the groove in the connecting cylinder 9 through the convex strip 30 arranged thereon, so as to prevent the lens frame 7 from rotating and enable the lens frame 7 to move back and forth, thereby realizing the adjustment of the focal length. The eyepiece 3 focuses on the two eyepieces 3 separately by setting the focusing sleeve 6, which is convenient for focusing and enables both eyepieces 3 to be adjusted to a clear state. The automatic focusing mechanism 5 can automatically adjust the focal length of the eyepiece 3 without the need to manually rotate the focusing sleeve 6 for adjustment, which improves the convenience of focal length adjustment and also improves the accuracy of focal length adjustment.

[0031] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A large field of view Porro prism binocular telescope with independent focusing for both eyes, characterized in that: It includes two lens barrels (1), an objective lens (2), an eyepiece (3), a connecting shaft (4), and an automatic focusing mechanism (5); the objective lens (2) and the eyepiece (3) are respectively installed at both ends of the lens barrel (1), and the two lens barrels (1) are rotatably connected through the connecting shaft (4); the eyepiece (3) includes a focusing sleeve (6), a lens frame (7), and a lens (8) installed in the lens frame (7), the focusing sleeve (6) is rotatably installed on a connecting cylinder (9) provided at the end of the lens barrel (1) through a bearing, and the lens frame (7) is threadedly installed in the focusing sleeve (6); two fixing pieces (10) are respectively provided on the side walls of the two lens barrels (1), and the two fixing pieces (10) are respectively connected to the upper and lower ends of the connecting shaft (4) by bolts; the bolt connected to the upper end of the connecting shaft (4) is a hollow bolt (11) that penetrates up and down and is communicated with the cavity provided inside the connecting shaft (4), a micro motor (12) is installed in the cavity of the connecting shaft (4), the output shaft (17) of the micro motor (12) extends out of the hollow bolt (11) and is in transmission connection with the automatic focusing mechanism (5) installed on the hollow bolt (11), and a transmission tooth (14) is provided on the outer wall of the focusing sleeve (6) and is in transmission connection with the automatic focusing mechanism (5).

2. The large-field-of-view Porro prism binocular telescope with independent focusing for both eyes according to claim 1, characterized in that: The automatic focusing mechanism (5) includes a fixed frame (15) and a gear transmission group (16) installed in the fixed frame (15), and the gear transmission group (16) transmits and connects the output shaft (17) of the micro motor (12) and the transmission tooth (14) on the focusing sleeve (6).

3. The large-field-of-view Porro prism binocular telescope with independent focus adjustment for both eyes according to claim 2, characterized in that: The gear transmission group (16) includes two reduction gears (18) in transmission connection with the output shaft (17) of the micro motor (12), a coarse adjustment gear (19) and a fine adjustment gear (20) coaxially connected to the reduction gear (18) through a connecting rod, two output gears (21) respectively connected to the coarse adjustment gear (19) and the fine adjustment gear (20), and a control gear (22) installed at the top of the fixed frame (15) between the two output gears (21) and selectively meshing with one of the two output gears (21) and meshing with the transmission tooth (14).

4. A large field of view Porro prism binocular telescope with independent focusing for both eyes according to claim 3, characterized in that: The diameter of the coarse adjustment gear (19) is larger than that of the fine adjustment gear (20).

5. A large field of view Porro prism binocular telescope with independent focusing for both eyes according to claim 3, characterized in that: The control gear (22) is rotatably installed on a control rod (23), the control rod (23) is installed in a chute (26) provided on the inner wall of a window (25) provided at the top of the fixed frame (15) through a mounting disc (24), a mounting frame (27) is provided at the top of the fixed frame (15), and a side surface of a square block (28) provided on the control rod (23) is elastically connected to the inner wall of the mounting frame (27) through a spring (29).

6. A large field of view Porro prism binocular telescope with independent focusing for both eyes according to any one of claims 1-5, characterized in that: A battery (13) for supplying power to the micro motor (12) is provided in the cavity of the connecting shaft (4), and a start button for controlling the rotation of the micro motor (12) and a steering button for controlling the rotation direction of the micro motor (12) are provided on the side wall of the connecting shaft (4).

7. A large field of view Porro prism binocular telescope with independent focusing for both eyes according to any one of claims 1-5, characterized in that: A rib (30) is axially provided at the rear section of the lens frame (7), and the rib (30) is slidably installed in a groove provided on the inner wall of the connecting cylinder (9). An annular boss (31) is provided at the front section of the lens frame (7) and is threadedly connected to the inner wall of the focusing sleeve (6).

8. A large field of view Porro prism binocular telescope with independent focusing for both eyes according to claim 5, characterized in that: A dust cover (32) made of a soft material is provided at the top of the mounting frame (27).

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