Optical continuous zooming structure of operating microscope

Abstract

The utility model discloses an optical continuous zooming structure of an operating microscope. The optical continuous zooming structure comprises a fixed lens group unit, a first movable lens group unit, a second movable lens group unit, a rotating cylinder and a zooming knob, the fixed lens group unit comprises a supporting member, a first fixed lens group and a second fixed lens group; the first fixed lens group is fixed on the support member; the second fixed lens group is positioned below the first fixed lens group; a first guide structure and a second guide structure are arranged on the supporting component; a rotating cylinder rotatably mounted on the support member and provided with a first cam groove and a second cam groove; a first bevel gear is arranged on the rotating cylinder; and the zoom knob is rotatably arranged and is provided with a second bevel gear meshed with the first bevel gear. According to the utility model, the transmission efficiency can be improved, the zooming knob can be rotated through smaller torque to realize zooming, the experience of a user is improved, the structure is simple and compact, and the size can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of surgical microscopes, and specifically to an optical continuous zoom structure for a surgical microscope. Background Technology

[0002] Existing optical continuous zoom structures for surgical microscopes include a first fixed lens group, a second fixed lens group, a first movable lens group, and a second movable lens group; the first and second movable lens groups are located between the first and second fixed lens groups. During use, different optical magnifications can be achieved by adjusting the positions of the first and second movable lens groups. However, current optical continuous zoom structures on the domestic market generally employ a complex multi-stage gear transmission design. This multi-stage transmission results in low transmission efficiency, leading to a heavy feel when turning the zoom knob, which is unpleasant for the user. Furthermore, the complex structure results in a large size and higher cost, which is detrimental to the portability of microscope lenses. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide an optical continuous zoom structure for a surgical microscope, which can improve transmission efficiency and achieve zoom by rotating the zoom knob with less torque, thereby enhancing the user experience. Moreover, its structure is simple and compact, which can reduce its size and reduce costs.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An optical continuous zoom structure for a surgical microscope includes a fixed lens group unit, a first movable lens group unit, a second movable lens group unit, a rotating cylinder, and a zoom knob.

[0006] The fixed lens assembly unit includes a support member, a first fixed lens assembly, and a second fixed lens assembly; the first fixed lens assembly is fixed to the support member; the second fixed lens assembly is fixed to the support member and located below the first fixed lens assembly; the support member is provided with a first guide structure and a second guide structure; both the first guide structure and the second guide structure extend along the height direction of the support member;

[0007] The rotating cylinder is rotatably mounted on the support member and is provided with a first cam groove and a second cam groove; a first bevel gear is provided on the rotating cylinder;

[0008] The zoom knob is rotatable and is equipped with a second bevel gear that meshes with the first bevel gear;

[0009] The first movable lens unit includes a first movable lens group located between the first fixed lens group and the second fixed lens group. The first movable lens unit is movably engaged with the first guide structure and can move along the extension direction of the first guide structure. The first movable lens unit is provided with a first insert for being movably embedded in the first cam groove so as to cause the first movable lens unit to move along the extension direction of the first guide structure when the magnification knob is rotated.

[0010] The second movable lens unit includes a second movable lens group located between the first movable lens group and the second fixed lens group. The second movable lens unit is movably engaged with the second guide structure and can move along the extension direction of the second guide structure. The second movable lens unit is provided with a second insert for being movably embedded in the second cam groove so as to cause the second movable lens unit to move along the extension direction of the second guide structure when the magnification knob is rotated.

[0011] The tooth ratio between the first bevel gear and the second bevel gear is 1.5:1 to 2.5:1.

[0012] The ratio of the number of teeth of the first bevel gear to the number of teeth of the second bevel gear is 2:1.

[0013] The first guiding structure is a first guide rod, and the first movable mirror assembly unit is movably mounted on the first guide rod.

[0014] The second guiding structure is a second guide rod, and the second movable mirror assembly unit is movably mounted on the second guide rod.

[0015] Both the first cam groove and the second cam groove are spiral grooves that are set on the rotating cylinder and are spiral in shape.

[0016] The optical continuous zoom structure of the surgical microscope also includes a housing disposed outside the support member, on which the zoom knob is rotatably mounted.

[0017] The upper and lower ends of the rotating cylinder are each provided with a first bevel gear. The optical continuous zoom structure of the surgical microscope includes two zoom knobs corresponding to the two first bevel gears respectively, and each zoom knob is provided with a second bevel gear that meshes with the corresponding first bevel gear.

[0018] The first movable lens assembly unit further includes a first movable support, the first movable lens assembly is disposed on the first movable support, and the first movable support is movably engaged with the first guide structure.

[0019] The second movable lens assembly unit also includes a second movable support, the second movable lens assembly is disposed on the second movable support, and the second movable support is movably engaged with the second guide structure.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This utility model provides an optical continuous zoom structure for a surgical microscope. It combines a fixed lens group unit, a first movable lens group unit, a second movable lens group unit, a rotating cylinder, and a zoom knob. Through the cooperation of a first insert with a first cam groove and a second insert with a second cam groove, only one stage of transmission is needed to move the first and second movable lens group units, improving transmission efficiency. Furthermore, zooming is achieved by rotating the zoom knob with less torque, enhancing the user experience. Moreover, its simple and compact structure reduces its size, meeting user expectations and lowering costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the optical continuous zoom structure of the surgical microscope of this utility model;

[0023] Figure 2 This is a cross-sectional view of the optical continuous zoom structure of the surgical microscope of this invention;

[0024] Figure 3 This is a schematic diagram showing the engagement of the rotating cylinder, the first bevel gear, and the second bevel gear.

[0025] Figure 4 A schematic diagram showing the coordination of the fixed lens unit, the first movable lens unit, and the second movable lens unit.

[0026] Among them, 10 is a fixed lens assembly unit; 11 is a supporting component; 12 is a first fixed lens assembly; 13 is a second fixed lens assembly; 14 is a first guide structure; 15 is a second guide structure; 16 is a housing; 20 is a first movable lens assembly unit; 21 is a first movable lens assembly; 22 is a first insert; 23 is a first movable bracket; 30 is a second movable lens assembly unit; 31 is a second movable lens assembly; 32 is a second insert; 33 is a second movable bracket; 40 is a rotating cylinder; 41 is a first cam groove; 42 is a second cam groove; 43 is a first bevel gear; 50 is a magnification knob; and 51 is a second bevel gear. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] like Figure 1-4 As shown, an optical continuous zoom structure for a surgical microscope includes a fixed lens group unit 10, a first movable lens group unit 20, a second movable lens group unit 30, a rotating cylinder 40, and a zoom knob 50.

[0029] The fixed lens assembly unit 10 includes a support member 11, a first fixed lens assembly 12, and a second fixed lens assembly 13; the first fixed lens assembly 12 is fixed to the support member 11; the second fixed lens assembly 13 is fixed to the support member 11 and is located below the first fixed lens assembly 12; the support member 11 is provided with a first guide structure 14 and a second guide structure 15; both the first guide structure 14 and the second guide structure 15 extend along the height direction of the support member 11.

[0030] The rotating cylinder 40 is rotatably mounted on the support member 11 and is provided with a first cam groove 41 and a second cam groove 42; a first bevel gear 43 is provided on the rotating cylinder 40.

[0031] The zoom knob 50 is rotatable and is provided with a second bevel gear 51 that meshes with the first bevel gear 43;

[0032] The first movable lens assembly unit 20 includes a first movable lens assembly 21 located between the first fixed lens assembly 12 and the second fixed lens assembly 13. The first movable lens assembly unit 20 is movably engaged with the first guide structure 14 and can move along the extension direction of the first guide structure 14. The first movable lens assembly unit 20 is provided with a first insert 22 for being movably fitted into the first cam groove 41 so as to cause the first movable lens assembly unit 20 to move along the extension direction of the first guide structure 14 when the magnification knob 50 is rotated.

[0033] The second movable lens assembly unit 30 includes a second movable lens assembly 31 located between the first movable lens assembly 21 and the second fixed lens assembly 13. The second movable lens assembly unit 30 is movably engaged with the second guide structure 15 and can move along the extension direction of the second guide structure 15. The second movable lens assembly unit 30 is provided with a second insert 32 for being movably fitted into the second cam groove 42 so as to cause the second movable lens assembly unit 30 to move along the extension direction of the second guide structure 15 when the magnification knob 50 is rotated.

[0034] In use, rotating the magnification knob 50 drives the first bevel gear 43 to rotate via the second bevel gear 51, which in turn drives the rotating cylinder 40 to rotate. The first insert 22, in conjunction with the first cam groove 41, causes the first movable lens unit 20 to move along the extension direction of the first guide structure 14. Similarly, the second insert 32, in conjunction with the second cam groove 42, causes the second movable lens unit 30 to move along the extension direction of the second guide structure 15. This movement of the first and second movable lens units 20 and 30 allows for different optical magnifications to be changed. Therefore, the continuous optical magnification structure of the surgical microscope provided by this invention... By combining a fixed lens assembly unit 10, a first movable lens assembly unit 20, a second movable lens assembly unit 30, a rotating cylinder 40, and a zoom knob 50, and through the cooperation of the first insert 22 with the first cam groove 41 and the second insert 32 with the second cam groove 42, only the second bevel gear 51 and the first bevel gear 43 need to form a single-stage transmission to drive the first movable lens assembly unit 20 and the second movable lens assembly unit 30 to move. This shortens the transmission path, improves transmission efficiency, and allows for zooming by rotating the zoom knob 50 with less torque, enhancing the user experience. Moreover, the structure is simple and compact, reducing its size and meeting user expectations for the product. In addition, it also reduces costs.

[0035] The gear ratio of the first bevel gear 43 to the second bevel gear 51 is 1.5:1 to 2.5:1. By reasonably setting the gear ratio of the first bevel gear 43 to the second bevel gear 51, the torque required to rotate the multiplication knob 50 can be further reduced.

[0036] As the most preferred embodiment of this utility model, the gear ratio of the first bevel gear 43 to the second bevel gear 51 is 2:1, so that the reduction ratio of the first bevel gear 43 to the second bevel gear 51 is about 2:1, which can ensure that the multiplication knob 50 can drive the rotating cylinder 40 to rotate with a relatively small torque, thus obtaining a better feel.

[0037] In this embodiment, when the magnification knob 50 is rotated one revolution, the first insert 22 moves from one end of the first cam groove 41 to the other end of the first cam groove 41, and the second insert 32 moves from one end of the second cam groove 42 to the other end of the second cam groove 42.

[0038] The first guiding structure 14 is a first guide rod, and the first movable lens assembly unit 20 is movably mounted on the first guide rod. By adopting the above structure, the first movable lens assembly unit 20 can move along the first guide rod, which is convenient for processing and manufacturing, and helps to reduce costs.

[0039] The second guiding structure 15 is a second guide rod, and the second movable lens assembly unit 30 is movably mounted on the second guide rod. By adopting the above structure, the second movable lens assembly unit 30 can move along the second guide rod, which is convenient for processing and manufacturing, and helps to reduce costs.

[0040] Both the first cam groove 41 and the second cam groove 42 are spiral grooves arranged on the rotating cylinder 40. By rotating the rotating cylinder 40, the spiral grooves of the first cam groove 41 and the second cam groove 42 can rotate, which can cause the first insert 22 to move along the first guide rod with the first movable lens assembly unit 20, and the second insert 32 to move along the second guide rod with the second movable lens assembly unit 30.

[0041] The optical continuous zoom structure of the surgical microscope also includes a housing 16 disposed outside the support member 11, and the zoom knob 50 is rotatably mounted on the housing 16.

[0042] The upper and lower ends of the rotating cylinder 40 are each provided with a first bevel gear 43. The optical continuous zoom structure of the surgical microscope includes two zoom knobs 50 corresponding to the two first bevel gears 43 respectively. Each zoom knob 50 is provided with a second bevel gear 51 that meshes with the corresponding first bevel gear 43. In use, the rotating cylinder 40 can be rotated by rotating any zoom knob 50, which makes it more convenient to use.

[0043] The first movable lens assembly unit 20 also includes a first movable support 23. The first movable lens assembly 21 is disposed on the first movable support 23. The first movable support 23 is movably engaged with the first guide structure 14, thereby facilitating manufacturing.

[0044] The second movable lens assembly unit 30 also includes a second movable support 33. The second movable lens assembly 31 is mounted on the second movable support 33. The second movable support 33 is movably engaged with the second guide structure 15, thereby facilitating manufacturing.

[0045] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An optical continuous zoom structure for a surgical microscope, characterized in that: It includes a fixed lens group unit, a first movable lens group unit, a second movable lens group unit, a rotating cylinder, and a zoom knob; The fixed lens assembly unit includes a support member, a first fixed lens assembly, and a second fixed lens assembly; the first fixed lens assembly is fixed to the support member; the second fixed lens assembly is fixed to the support member and located below the first fixed lens assembly; the support member is provided with a first guide structure and a second guide structure; both the first guide structure and the second guide structure extend along the height direction of the support member; The rotating cylinder is rotatably mounted on the support member and is provided with a first cam groove and a second cam groove; a first bevel gear is provided on the rotating cylinder; The zoom knob is rotatable and is equipped with a second bevel gear that meshes with the first bevel gear; The first movable lens unit includes a first movable lens group located between the first fixed lens group and the second fixed lens group. The first movable lens unit is movably engaged with the first guide structure and can move along the extension direction of the first guide structure. The first movable lens unit is provided with a first insert for being movably embedded in the first cam groove so as to cause the first movable lens unit to move along the extension direction of the first guide structure when the magnification knob is rotated. The second movable lens unit includes a second movable lens group located between the first movable lens group and the second fixed lens group. The second movable lens unit is movably engaged with the second guide structure and can move along the extension direction of the second guide structure. The second movable lens unit is provided with a second insert for being movably embedded in the second cam groove so as to cause the second movable lens unit to move along the extension direction of the second guide structure when the magnification knob is rotated.

2. The optical continuous zoom structure of the surgical microscope as described in claim 1, characterized in that: The tooth ratio between the first bevel gear and the second bevel gear is 1.5:1 to 2.5:

1.

3. The optical continuous zoom structure of the surgical microscope as described in claim 2, characterized in that: The ratio of the number of teeth of the first bevel gear to the number of teeth of the second bevel gear is 2:

1.

4. The optical continuous zoom structure of the surgical microscope as described in claim 1, characterized in that: The first guiding structure is a first guide rod, and the first movable mirror assembly unit is movably mounted on the first guide rod.

5. The optical continuous zoom structure of the surgical microscope as described in claim 1 or 4, characterized in that: The second guiding structure is a second guide rod, and the second movable mirror assembly unit is movably mounted on the second guide rod.

6. The optical continuous zoom structure of the surgical microscope as described in claim 1, characterized in that: Both the first cam groove and the second cam groove are spiral grooves that are set on the rotating cylinder and are spiral in shape.

7. The optical continuous zoom structure of the surgical microscope as described in claim 1, characterized in that: The optical continuous zoom structure of the surgical microscope also includes a housing disposed outside the support member, on which the zoom knob is rotatably mounted.

8. The optical continuous zoom structure of the surgical microscope as described in claim 1 or 7, characterized in that: The upper and lower ends of the rotating cylinder are each provided with a first bevel gear. The optical continuous zoom structure of the surgical microscope includes two zoom knobs corresponding to the two first bevel gears respectively, and each zoom knob is provided with a second bevel gear that meshes with the corresponding first bevel gear.

9. The optical continuous zoom structure of the surgical microscope as described in claim 1, characterized in that: The first movable lens assembly unit further includes a first movable support, the first movable lens assembly is disposed on the first movable support, and the first movable support is movably engaged with the first guide structure.

10. The optical continuous zoom structure of the surgical microscope as described in claim 1, characterized in that: The second movable lens assembly unit also includes a second movable support, the second movable lens assembly is disposed on the second movable support, and the second movable support is movably engaged with the second guide structure.

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