Optical continuous zooming structure of operating microscope

Abstract

The invention 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; the rotating cylinder is rotatably mounted on the supporting member; 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 invention, the transmission efficiency can be improved, the zooming knob can be rotated through a smaller torque to realize zooming, the user experience is improved, and the first movable lens group unit, the second movable lens group unit and the rotating cylinder can be conveniently separated and assembled.

Description

Technical Field

[0001] The present invention relates to the field of surgical microscopes, and in particular to an optical continuous zoom structure of a surgical microscope. Background Art

[0002] The optical continuous zoom structure of existing surgical microscopes includes 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, the optical continuous zoom structures currently on the domestic market generally use a complex multi-stage gear transmission design. This multi-stage transmission results in low transmission efficiency, making the zoom knob feel heavy to turn, which is not a good user experience. Furthermore, the complex structure makes the zoom mechanism bulky and expensive, which is detrimental to the lightweight design of the microscope lens. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention 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 a smaller torque, thereby improving the user experience. Moreover, its structure is simple and compact, which can reduce its size and reduce costs.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] An optical continuous zoom structure for a surgical microscope, characterized by comprising a fixed lens unit, a first movable lens unit, a second movable lens unit, a rotating cylinder, and a zoom knob;

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

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

[0008] The zoom knob is rotatably arranged and is provided with a second bevel gear meshing with the first bevel gear;

[0009] The first movable mirror group unit includes a first movable mirror group located between the first fixed mirror group and the second fixed mirror group, the first movable mirror group unit being movably engaged with the first guide structure and movable along the extension direction of the first guide structure; a first mounting hole is provided on the first movable mirror group unit, the first mounting hole being provided with a first inserting member for movably embedding in the first cam groove to cause the first movable mirror group unit to move along the extension direction of the first guide structure when the zoom knob is rotated; and a first actuating device is installed on the first movable mirror group unit for causing the first inserting member to move axially along the first mounting hole;

[0010] The second movable mirror group unit includes a second movable mirror group located between the first movable mirror group and the second fixed mirror group, the second movable mirror group unit is movably cooperated with the second guide structure and can move along the extension direction of the second guide structure; the second movable mirror group unit is provided with a second mounting hole, the second mounting hole is equipped with a second insert for being movably embedded in the second cam groove to prompt the second movable mirror group unit to move along the extension direction of the second guide structure when the magnification knob is rotated, and the second movable mirror group unit is equipped with a second actuating device for prompting the second insert to move axially along the second mounting hole.

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

[0012] The gear ratio between the first bevel gear and the second bevel gear is 2:1.

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

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

[0015] The first cam groove and the second cam groove are both spiral grooves provided on the rotating cylinder and in a spiral shape.

[0016] The optical continuous zoom structure of the surgical microscope further comprises a shell arranged outside the supporting component, and the zoom knob is rotatably mounted on the shell.

[0017] A first bevel gear is provided at the upper and lower ends of the rotating cylinder. 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 meshing with the corresponding first bevel gear.

[0018] The first movable mirror group unit further includes a first movable bracket, the first movable mirror group is arranged on the first movable bracket, and the first movable bracket is movably matched with the first guide structure.

[0019] The second movable mirror group unit further includes a second movable bracket, the second movable mirror group is arranged on the second movable bracket, and the second movable bracket is movably matched with the second guide structure.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides an optical continuous zoom structure for a surgical microscope. The structure adopts a combination of a fixed lens group unit, a first movable lens group unit, a second movable lens group unit, a rotating barrel, and a zoom knob. Through the cooperation of a first embedded part and a first cam groove, and a second embedded part and a second cam groove, only one-stage transmission is required to achieve movement of the first movable lens group unit and the second movable lens group unit, thereby improving transmission efficiency. The zoom knob can be rotated with a smaller torque to achieve zooming, thereby improving the user experience. Moreover, the structure is simple and compact, and its volume can be reduced, meeting user expectations for the product. In addition, the cost can be reduced. The structure also facilitates separation and assembly of the first movable lens group unit, the second movable lens group unit, and the rotating barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the optical continuous zoom structure of the surgical microscope of the present invention;

[0023] Figure 2 A cross-sectional view of the optical continuous zoom structure of the surgical microscope of the present invention;

[0024] Figure 3 for Figure 2 A magnified view of point A;

[0025] Figure 4 for Figure 2 Enlarged view of point B;

[0026] Figure 5 Schematic diagram of the cooperation between the rotating cylinder, the first bevel gear and the second bevel gear;

[0027] Figure 6 Schematic diagram of the coordination between the fixed lens unit, the first movable lens unit and the second movable lens unit

[0028] Among them, 10, fixed mirror unit; 11, supporting member; 12, first fixed mirror unit; 13, second fixed mirror unit; 14, first guiding structure; 15, second guiding structure; 16, housing; 20, first movable mirror unit; 21, first movable mirror unit; 22, first embedded component; 23, first movable bracket; 24, first mounting hole; 30, second movable mirror unit; 31, second movable mirror unit; 32, second embedded component; 33, second movable bracket; 34, second mounting hole; 40. Rotating cylinder; 41. First cam groove; 42. Second cam groove; 43. First bevel gear; 50. Zoom knob; 51. Second bevel gear; 60. First actuating device; 61. First adjusting member; 62. First spring; 63. First pressure-bearing inclined surface; 64. First push-resisting inclined surface; 65. First threaded hole; 70. Second actuating device; 71. Second adjusting member; 72. Second spring; 73. Second pressure-bearing inclined surface; 74. Second push-resisting inclined surface; 75. Second threaded hole. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] like Figure 1-6 As shown, an optical continuous zoom structure of a surgical microscope includes a fixed lens unit 10, a first movable lens unit 20, a second movable lens unit 30, a rotating cylinder 40 and a zoom knob 50;

[0031] The fixed mirror group unit 10 includes a support member 11, a first fixed mirror group 12, and a second fixed mirror group 13. The first fixed mirror group 12 is fixed to the support member 11. The second fixed mirror group 13 is fixed to the support member 11 and is located below the first fixed mirror group 12. The support member 11 is provided with a first guide structure 14 and a second guide structure 15. The first guide structure 14 and the second guide structure 15 both extend along the height direction of the support member 11.

[0032] The rotating cylinder 40 is rotatably mounted on the supporting member 11 and is provided with a first cam groove 41 and a second cam groove 42 ; the rotating cylinder 40 is provided with a first bevel gear 43 ;

[0033] The zoom knob 50 is rotatably provided and is provided with a second bevel gear 51 that meshes with the first bevel gear 43;

[0034] The first movable lens group unit 20 includes a first movable lens group 21 located between the first fixed lens group 12 and the second fixed lens group 13. The first movable lens group unit 20 is movably engaged with the first guide structure 14 and is movable along the extension direction of the first guide structure 14. The first movable lens group unit 20 is provided with a first mounting hole 24. A first inserting member 22 is mounted in the first mounting hole 24 for movably inserting into the first cam groove 41 to cause the first movable lens group unit 20 to move along the extension direction of the first guide structure 14 when the zoom knob 50 is rotated. The first movable lens group unit 20 is also provided with a first actuating device 60 for causing the first inserting member 22 to move axially along the first mounting hole 24.

[0035] The second movable mirror group unit 30 includes a second movable mirror group 31 located between the first movable mirror group 21 and the second fixed mirror group 13. The second movable mirror group unit 30 is movably matched with the second guide structure 15 and can move along the extension direction of the second guide structure 15. The second movable mirror group unit 30 is provided with a second mounting hole 34, and the second mounting hole 34 is installed with a second inserting part 32 for being movably embedded in the second cam groove 42 to prompt the second movable mirror group unit 30 to move along the extension direction of the second guide structure 15 when the magnification knob 50 is rotated. The second movable mirror group unit 30 is installed with a second actuating device 70 for prompting the second inserting part 32 to move axially along the second mounting hole 34.

[0036] During use, by rotating the magnification knob 50, the first bevel gear 43 can be driven to rotate through the second bevel gear 51, thereby driving the rotating cylinder 40 to rotate, and the first embedded component 22 and the first cam groove 41 cooperate to promote the first movable lens group unit 20 to move along the extension direction of the first guide structure 14, and the second embedded component 32 and the second cam groove 42 cooperate to promote the second movable lens group unit 30 to move along the extension direction of the second guide structure 15, so as to realize the change of different optical magnifications through the movement of the first movable lens group unit 20 and the second movable lens group unit 30. The second actuating device 70 is used to urge the second embedded member 32 to move axially along the second mounting hole 34 toward the inside of the second mounting hole 34, so that the first embedded member 22 and the second embedded member 32 can be separated from the rotating cylinder 40, thereby facilitating the disassembly and replacement of the first movable mirror group unit 20 and the second movable mirror group unit 30. In the subsequent installation process, after the first movable mirror group unit 20 and the second movable mirror group unit 30 are respectively installed on the first guide structure 14 and the second guide structure 15, the first actuating device 60 is used to urge the first embedded member 22 to move axially along the first mounting hole 24 toward the outside of the first mounting hole 24, and the second actuating device 70 is used to urge the second embedded member 32 to move axially along the second mounting hole 34 toward the outside of the second mounting hole 34, so that the first embedded member 22 and the second embedded member 32 can be respectively embedded in the first cam groove 41 and the second cam groove 41. The wheel groove 42 facilitates the assembly of the first movable lens group unit 20, the second movable lens group unit 30 and the rotating cylinder 40. Therefore, the optical continuous zoom structure of the surgical microscope provided by the present invention adopts the combination of the fixed lens group unit 10, the first movable lens group unit 20, the second movable lens group unit 30, the rotating cylinder 40 and the zoom knob 50, and through the cooperation of the first embedded part 22 and the first cam groove 41, and the cooperation of the second embedded part 32 and the second cam groove 42, only the second bevel gear 51 and the first bevel gear 43 form a first-stage transmission to drive the first movable lens group unit 20 and the second movable lens group unit 30 to move, which can shorten the transmission path and improve the transmission efficiency. The zoom knob 50 can be rotated with a smaller torque to achieve zooming, thereby improving the user experience. Moreover, the structure is simple and compact, and its volume can be reduced, which meets the user's expectations for the product and reduces the cost. It is also convenient to separate and assemble the first movable lens group unit 20, the second movable lens group unit 30 and the rotating cylinder 40.

[0037] The gear ratio of the first bevel gear 43 to the second bevel gear 51 is 1.5:1-2.5:1. By properly setting the gear ratio of the first bevel gear 43 to the second bevel gear 51, the torque for rotating the zoom knob 50 can be further reduced.

[0038] As the most preferred embodiment of the present invention, the tooth ratio of the first bevel gear 43 and the second bevel gear 51 is 2:1, so that the reduction ratio of the first bevel gear 43 and the second bevel gear 51 is approximately 2:1, which can ensure that the magnification knob 50 can drive the rotating cylinder 40 to rotate with a relatively small torque, thereby obtaining a better hand feel.

[0039] In this embodiment, when the zoom knob 50 rotates one circle, 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 .

[0040] The first guide structure 14 is a first guide rod, and the first movable mirror unit 20 is movably mounted on the first guide rod. By adopting the above structure, the first movable mirror unit 20 can move along the first guide rod, and is convenient for processing and manufacturing, which is conducive to reducing costs.

[0041] The second guide structure 15 is a second guide rod, and the second movable mirror unit 30 is movably mounted on the second guide rod. By adopting the above structure, the second movable mirror unit 30 can move along the second guide rod, and is convenient for processing and manufacturing, which is conducive to reducing costs.

[0042] The first cam groove 41 and the second cam groove 42 are both spiral grooves provided on the rotating cylinder 40. The rotation of the rotating cylinder 40 causes the spiral grooves of the first cam groove 41 and the second cam groove 42 to rotate, thereby causing the first insert 22 to move along the first guide rod along with the first movable lens assembly unit 20, and the second insert 32 to move along the second guide rod along with the second movable lens assembly unit 30.

[0043] The optical continuous zoom structure of the surgical microscope further includes a housing 16 disposed outside the supporting member 11 , and the zoom knob 50 is rotatably mounted on the housing 16 .

[0044] A first bevel gear 43 is provided at the upper and lower ends of the rotating cylinder 40. The optical continuous magnification structure of the surgical microscope includes two magnification knobs 50 corresponding to the two first bevel gears 43 respectively. Each magnification knob 50 is provided with a second bevel gear 51 that meshes with the corresponding first bevel gear 43. When in use, the rotating cylinder 40 can be rotated by rotating any one of the magnification knobs 50, which is more convenient to use.

[0045] The first movable mirror group unit 20 further includes a first movable bracket 23 , on which the first movable mirror group 21 is disposed. The first movable bracket 23 is movably matched with the first guide structure 14 , thereby facilitating manufacturing.

[0046] The second movable mirror group unit 30 further includes a second movable bracket 33 , on which the second movable mirror group 31 is disposed. The second movable bracket 33 is movably matched with the second guide structure 15 , thereby facilitating manufacturing.

[0047] The first actuating device 60 includes a first threaded hole 65 provided on the first movable mirror group unit 20 and connected to the first mounting hole 24, a first adjusting member 61 threadedly connected to the first threaded hole 65, and a first spring 62; the first embedded member 22 is provided with a first pressure-bearing inclined surface 63, the first adjusting member 61 is provided with a first pushing inclined surface 64 for pushing the first pressure-bearing inclined surface 63 when the first adjusting member 61 moves toward the direction close to the first mounting hole 24 to enable the first embedded member 22 to move toward the inside of the first mounting hole 24, the first spring 62 is pressed between the first embedded member 22 and the hole wall of the first mounting hole 24, and is used to provide an elastic force to urge the first embedded member 22 to move toward the outside of the first mounting hole 24. During use, the first adjusting member 61 is screwed in upward to move the first adjusting member 61 upward, and the first resisting inclined surface 64 is used to resist the first pressure-bearing inclined surface 63 to move the first embedded member 22 toward the inside of the first mounting hole 24, so that the first embedded member 22 can be separated from the rotating cylinder 40; in the subsequent installation process, after the first movable mirror group unit 20 is installed on the first guide structure 14, the first adjusting member 61 is screwed in downward to move the first adjusting member 61 downward, and the first spring 62 prompts the first embedded member 22 to move toward the outside of the first mounting hole 24, so that the first pressure-bearing inclined surface 63 is against the first resisting inclined surface 64, and the first embedded member 22 is embedded in the first cam groove 41, thereby facilitating the assembly of the first movable mirror group unit 20 and the rotating cylinder 40 while reducing costs.

[0048] The first resisting inclined surface 64 slopes upward from one end of the first resisting inclined surface 64, which is closest to the inner end of the first mounting hole 24, to the other end. The inclination of the first pressure-bearing inclined surface 63 matches the inclination of the first resisting inclined surface 64. The first mounting hole 24 and the first threaded hole 65 are both provided on the first movable bracket 23.

[0049] The second actuating device 70 includes a second threaded hole 75 provided on the second movable mirror group unit 30 and connected to the second mounting hole 34, a second adjusting member 71 threadedly connected to the second threaded hole 75, and a second spring 72; the second embedded member 32 is provided with a second pressure-bearing inclined surface 73, and the second adjusting member 71 is provided with a second pushing inclined surface 74 for pushing the second pressure-bearing inclined surface 73 to move the second embedded member 32 toward the inside of the second mounting hole 34 when the second adjusting member 71 moves toward the direction close to the second mounting hole 34. The second spring 72 is pressed between the second embedded member 32 and the hole wall of the second mounting hole 34 and is used to provide an elastic force to urge the second embedded member 32 to move toward the outside of the second mounting hole 34. When in use, the second adjusting member 71 is screwed in upward to move the second adjusting member 71 upward, and the second resisting inclined surface 74 is used to resist the second pressure-bearing inclined surface 73 to make the second embedded member 32 move toward the inside of the second mounting hole 34, so that the second embedded member 32 can be separated from the rotating cylinder 40; in the subsequent installation process, after the second movable mirror group unit 30 is installed on the second guide structure 15, the second adjusting member 71 is screwed in downward to move the second adjusting member 71 downward, and the second spring 72 prompts the second embedded member 32 to move toward the outside of the second mounting hole 34, so that the second pressure-bearing inclined surface 73 is against the second resisting inclined surface 74, and the second embedded member 32 is embedded in the second cam groove 42, thereby facilitating the assembly of the second movable mirror group unit 30 and the rotating cylinder 40 while reducing costs.

[0050] The second resisting inclined surface 74 is inclined upward from one end thereof close to the inner end of the second mounting hole 34 to the other end thereof. The inclination of the second pressure-bearing inclined surface 73 matches the inclination of the second resisting inclined surface 74.

[0051] The second fixed mirror group 13 is detachably fixed to the support member 11. In this embodiment, the second fixed mirror group 13 is fixed to the support member 11 by bolts. The second mounting hole 34 and the second threaded hole 75 are provided on the second movable bracket 33.

[0052] During the assembly process, after the first fixed mirror group 12 is fixed to the support member 11, the first movable mirror group unit 20 is mounted on the first guide rod, the second movable mirror group unit 30 is mounted on the second guide rod, and the second fixed mirror group 13 is fixed to the support member 11, the first fixed mirror group 12, the first movable mirror group unit 20, the second movable mirror group unit 30, the second fixed mirror group 13 and the support member 11 are installed as a whole, and the rotating cylinder 40 is rotatably installed on the support member 11. By screwing the first adjusting member 61 downward, the first adjusting member 61 moves downward, and the first spring 62 The first insert 22 is urged to move toward the outside of the first mounting hole 24, so that the first pressure-bearing inclined surface 63 abuts against the first push inclined surface 64, and the first insert 22 is inserted into the first cam groove 41. By screwing the second adjusting member 71 downward, the second adjusting member 71 moves downward, and the second spring 72 urges the second insert 32 to move toward the outside of the second mounting hole 34, so that the second pressure-bearing inclined surface 73 abuts against the second push inclined surface 74, and the second insert 32 is inserted into the second cam groove 42, completing the assembly of the first movable lens group unit 20, the second movable lens group unit 30 and the rotating cylinder 40.

[0053] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An optical continuous zoom structure for a surgical microscope, characterized by: It includes a fixed lens group unit, a first movable lens group unit, a second movable lens group unit, a rotating tube and a magnification knob; The fixed mirror group unit includes a support member, a first fixed mirror group, and a second fixed mirror group; the first fixed mirror group is fixed to the support member; the second fixed mirror group is fixed to the support member and is located below the first fixed mirror group; the support member is provided with a first guide structure and a second guide structure; the first guide structure and the second guide structure both extend along the height direction of the support member; The rotating cylinder is rotatably mounted on the supporting member and is provided with a first cam groove and a second cam groove; the rotating cylinder is provided with a first bevel gear; The zoom knob is rotatably arranged and is provided with a second bevel gear meshing with the first bevel gear; The first movable mirror group unit includes a first movable mirror group located between the first fixed mirror group and the second fixed mirror group, the first movable mirror group unit being movably engaged with the first guide structure and movable along the extension direction of the first guide structure; a first mounting hole is provided on the first movable mirror group unit, the first mounting hole being provided with a first inserting member for movably embedding in the first cam groove to cause the first movable mirror group unit to move along the extension direction of the first guide structure when the zoom knob is rotated; and a first actuating device is installed on the first movable mirror group unit for causing the first inserting member to move axially along the first mounting hole; The second movable mirror group unit includes a second movable mirror group located between the first movable mirror group and the second fixed mirror group, the second movable mirror group unit is movably cooperated with the second guide structure and can move along the extension direction of the second guide structure; the second movable mirror group unit is provided with a second mounting hole, the second mounting hole is equipped with a second insert for being movably embedded in the second cam groove to prompt the second movable mirror group unit to move along the extension direction of the second guide structure when the magnification knob is rotated, and the second movable mirror group unit is equipped with a second actuating device for prompting the second insert to move axially along the second mounting hole.

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

1.

3. The optical continuous zoom structure of a surgical microscope according to claim 2, characterized in that: The gear ratio between the first bevel gear and the second bevel gear is 2:

1.

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

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

6. The optical continuous zoom structure of a surgical microscope according to claim 1, characterized in that: The first cam groove and the second cam groove are both spiral grooves provided on the rotating cylinder and in a spiral shape.

7. The optical continuous zoom structure of a surgical microscope according to claim 1, characterized in that: The optical continuous zoom structure of the surgical microscope further comprises a shell arranged outside the supporting component, and the zoom knob is rotatably mounted on the shell.

8. The optical continuous zoom structure of a surgical microscope according to claim 1 or 7, characterized in that: A first bevel gear is provided at the upper and lower ends of the rotating cylinder. 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 meshing with the corresponding first bevel gear.

9. The optical continuous zoom structure of a surgical microscope according to claim 1, characterized in that: The first movable mirror group unit further includes a first movable bracket, the first movable mirror group is arranged on the first movable bracket, and the first movable bracket is movably matched with the first guide structure.

10. The optical continuous zoom structure of a surgical microscope according to claim 1, characterized in that: The second movable mirror group unit further includes a second movable bracket, the second movable mirror group is arranged on the second movable bracket, and the second movable bracket is movably matched with the second guide structure.

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