Surgical magnifier
By incorporating an adjusting screw and transmission mechanism within the surgical magnifying glass, synchronous adjustment of the two lenses is achieved, resolving the issues of cumbersome adjustment and poor symmetry in existing technologies, and providing a simple and symmetrical method for adjusting interpupillary distance.
Patent Information
- Application Number
- CN202511169161.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2025-11-14
AI Technical Summary
Existing surgical magnifying glasses are cumbersome to operate when adjusting interpupillary distance and it is difficult to ensure symmetry.
The two lenses are adjusted synchronously by setting up adjustment screws and transmission components. The transmission components connect the left and right adjustment screws, making them rotate synchronously, simplifying the adjustment process and ensuring symmetry.
It achieves easy adjustment of the interpupillary distance and good symmetry of the surgical magnifying glass, improving the user experience.
Smart Images
Figure CN120949401A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and more specifically, to a surgical magnifying glass. Background Technology
[0002] Surgical magnifiers employ converging observation technology, focusing the observer's binocular vision into a narrow cavity to create a bright, magnified three-dimensional field of view. This provides a unique, deep stereoscopic image for examination and treatment, making it a commonly used medical instrument. Because different users have different interpupillary distances (IPDs), the left and right lenses of the surgical magnifier are adjustable to accommodate different users. However, in related technologies, adjusting the interpupillary distance requires separately adjusting the positions of the left and right lenses. This adjustment method is cumbersome and makes it difficult to ensure the symmetry of the surgical magnifier. Summary of the Invention
[0003] The purpose of this application is to provide a surgical magnifying glass that allows for easy and convenient adjustment of the interpupillary distance while ensuring optimal symmetry.
[0004] The embodiments of this application can be implemented as follows: In a first aspect, this application provides a surgical magnifying glass, including a base, a left support, a right support, a left adjusting screw, a right adjusting screw, a transmission component, a left lens assembly, and a right lens assembly. The left and right supports are respectively disposed on opposite sides of the base. The left adjusting screw is rotatably disposed on the left support, and the right adjusting screw is rotatably disposed on the right support. The left lens assembly is slidably engaged with the left support, and the sliding direction is consistent with the axial direction of the left adjusting screw. The right lens assembly is slidably engaged with the right support, and the sliding direction is consistent with the axial direction of the right adjusting screw. The left adjusting screw is threadedly connected to the left lens assembly, and the right adjusting screw is threadedly connected to the right lens assembly. The adjacent ends of the left and right adjusting screws are connected by the transmission component to achieve synchronous rotation of the left and right adjusting screws.
[0005] In an optional implementation, both the left and right brackets are rotatably connected to the base so that the optical axis angle between the left and right lens assemblies is adjustable, and the transmission component is a double universal joint.
[0006] In an optional embodiment, the surgical magnifying glass further includes a toothed conditioner that slides with the base. The sliding direction of the toothed conditioner is perpendicular to the rotation axes of the left and right supports. The toothed conditioner has two rack portions. A left gear is fixedly provided at one end of the left support connected to the base, and the left gear coincides with the rotation axis of the left support. A right gear is fixedly provided at one end of the right support connected to the base, and the right gear coincides with the rotation axis of the right support. The two rack portions of the toothed conditioner mesh with the left gear and the right gear, respectively.
[0007] In an optional embodiment, the surgical magnifying glass further includes an angle adjustment screw, the two ends of which are rotatably connected to the base, and the angle adjustment screw is threadedly connected to the toothed part.
[0008] In an optional embodiment, the base is provided with a receiving cavity, the gear is disposed in the receiving cavity, the inner wall of the receiving cavity is provided with a sliding groove, the gear also includes a sliding part, the sliding part slides into the sliding groove, at least a portion of the left gear and at least a portion of the right gear extend into the receiving cavity and mesh with the rack portion.
[0009] In an optional implementation, the angle adjusting screw passes through a groove and is threadedly connected to the sliding part.
[0010] In an optional embodiment, one end of the angle adjusting screw is provided with an angle adjusting screw portion, which protrudes from the surface of the base.
[0011] In an optional embodiment, a left strip hole is provided on the left bracket, and the left lens assembly includes a left lens and a left connecting part connected to the left lens. The left connecting part is inserted into the left strip hole and can slide along the left strip hole. The left adjusting screw passes through the left strip hole along the length direction of the left strip hole and is threadedly connected to the left connecting part. The right bracket is provided with a right strip hole. The right lens assembly includes a right lens and a right connecting part connected to the right lens. The right connecting part is inserted into the right strip hole and can slide along the right strip hole. The right adjusting screw passes through the right strip hole along the length direction of the right strip hole and is threadedly connected to the right connecting part.
[0012] In an optional embodiment, the surgical magnifying glass further includes a left locking screw and a right locking screw. The left locking screw extends into the left slot along the depth direction of the left slot and is screwed into the left connecting part. The head of the left locking screw is used to abut against the left support to lock the position of the left connecting part relative to the left support. The right locking screw extends into the right slot along the depth direction of the right slot and is screwed into the right connecting part. The head of the right locking screw is used to abut against the right bracket to lock the position of the right connecting part relative to the right bracket.
[0013] In an optional embodiment, the end of the left adjusting screw away from the transmission component is provided with a left-hand turning part, which protrudes from the end of the left bracket away from the right bracket. And / or, the end of the right adjusting screw away from the transmission component is provided with a right-hand turning part, which protrudes from the end of the right bracket away from the left bracket.
[0014] The beneficial effects of the surgical magnifying glass provided in this application include: This application provides a surgical magnifying glass, including a base, a left support, a right support, a left adjustment screw, a right adjustment screw, a transmission component, a left lens assembly, and a right lens assembly. The left and right supports are respectively disposed on opposite sides of the base. The left adjustment screw is rotatably disposed on the left support, and the right adjustment screw is rotatably disposed on the right support. The left lens assembly slides with the left support, and the sliding direction is consistent with the axial direction of the left adjustment screw. The right lens assembly slides with the right support, and the sliding direction is consistent with the axial direction of the right adjustment screw. The left adjustment screw is threadedly connected to the left lens assembly, and the right adjustment screw is threadedly connected to the right lens assembly. The adjacent ends of the left and right adjustment screws are connected through the transmission component to achieve synchronous rotation of the left and right adjustment screws. The surgical magnifying glass provided in this application allows the left and right adjustment screws to rotate synchronously by turning the left and / or right adjustment screws. Since the left and right lens assemblies are respectively screwed to the left and right adjustment screws, they can be driven to move closer or further apart, thereby achieving interpupillary distance adjustment. As can be seen, the surgical magnifying glass of this application only requires adjusting one of the left or right adjustment screws to achieve synchronous adjustment of the left and right lens components, thereby changing the interpupillary distance. The adjustment method is simple and efficient, and because it is a synchronous adjustment on both sides, it has good symmetry. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of a surgical magnifying glass in one embodiment of this application; Figure 2 This is an exploded view of a surgical magnifying glass in one embodiment of this application; Figure 3 This is an exploded view of one embodiment of the present application, omitting the left and right lens assemblies; Figure 4 This is a schematic diagram illustrating the fit between the base and the teeth in one embodiment of this application.
[0017] Icons: 100-Base; 110-Receiving cavity; 210-Left bracket; 211-Left slotted hole; 212-Left adjusting screw; 213-Left screwing part; 214-Left gear; 215-Left locking screw; 216-Pin; 220-Right bracket; 221-Right slotted hole; 222-Right adjusting screw; 223-Right screwing part; 224-Right gear; 225-Right locking screw; 230-Transmission component; 310-Left lens assembly; 311-Left lens; 312-Left connecting part; 320-Right lens assembly; 321-Right lens; 322-Right connecting part; 400-Gear condition; 410-Rack part; 420-Sliding part; 500-Angle adjusting screw; 510-Angle adjusting screwing part; 520-Retaining ring. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0021] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0023] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.
[0024] In related technologies, surgical magnifying glasses require adjusting the positions of the left and right lenses separately when adjusting the interpupillary distance. This adjustment method is rather cumbersome. Furthermore, the symmetry after adjustment is poor, meaning that the center of the base is not exactly in the center of the two lenses.
[0025] Therefore, this application provides a surgical magnifying glass that achieves synchronous adjustment of two lenses by setting an adjusting screw and a transmission component, which is simple to adjust and has good symmetry.
[0026] Figure 1 This is a schematic diagram of a surgical magnifying glass in one embodiment of this application; Figure 2 This is an exploded view of a surgical magnifying glass in one embodiment of this application. Figure 1 and Figure 2 As shown, the surgical magnifying glass provided in this application embodiment includes a base 100, a left support 210, a right support 220, a left adjusting screw 212, a right adjusting screw 222, a transmission component 230, a left lens assembly 310, and a right lens assembly 320. The left bracket 210 and the right bracket 220 are respectively disposed on opposite sides of the base 100. The left adjusting screw 212 is rotatably disposed on the left bracket 210, and the right adjusting screw 222 is rotatably disposed on the right bracket 220. The left lens assembly 310 is slidably engaged with the left bracket 210 and the sliding direction is consistent with the axial direction of the left adjusting screw 212. The right lens assembly 320 is slidably engaged with the right bracket 220 and the sliding direction is consistent with the axial direction of the right adjusting screw 222. The left adjusting screw 212 is threadedly connected to the left lens assembly 310, and the right adjusting screw 222 is threadedly connected to the right lens assembly 320. The adjacent ends of the left adjusting screw 212 and the right adjusting screw 222 are connected through the transmission member 230 to realize the synchronous rotation of the left adjusting screw 212 and the right adjusting screw 222.
[0027] In this embodiment, rotating either the left adjusting screw 212 or the right adjusting screw 222 is sufficient to achieve synchronous rotation of both via the transmission member 230. Since the left lens assembly 310 and the right lens assembly 320 can slide and translate along the left support 210 and the right support 220, the rotation of the left adjusting screw 212 and the right adjusting screw 222 can cause the left lens assembly 310 and the right lens assembly 320 to move synchronously closer or further apart. It should be noted that the threads of the left adjusting screw 212 and the right adjusting screw 222 should have opposite directions of rotation to ensure that the left lens assembly 310 and the right lens assembly 320 move in opposite directions, i.e., towards each other or away from each other.
[0028] In this embodiment, the left support 210 is provided with a left strip hole 211. The left lens assembly 310 includes a left lens 311 and a left connecting part 312 connected to the left lens 311. The left connecting part 312 is inserted into the left strip hole 211 and can slide along the left strip hole 211. The left adjusting screw 212 passes through the left strip hole 211 along its length and is threadedly connected to the left connecting part 312. The left strip hole 211 can serve as a guide, allowing the left connecting part 312 on the left lens assembly 310 to translate along the length of the left strip hole 211 without rotating. When the left lens assembly 310 moves along the left support 210, the distance relative to the right lens assembly 320 is adjusted. Similarly, the right bracket 220 is provided with a right strip hole 221, and the right lens assembly 320 includes a right lens 321 and a right connecting part 322 connected to the right lens 321. The right connecting part 322 is inserted into the right strip hole 221 and can slide along the right strip hole 221. The right adjusting screw 222 passes through the right strip hole 221 along the length direction of the right strip hole 221 and is threadedly connected to the right connecting part 322.
[0029] Furthermore, the left adjusting screw 212 has a left-hand turning part 213 at the end away from the transmission member 230, which protrudes from the end of the left bracket 210 away from the right bracket 220. The right adjusting screw 222 has a right-hand turning part 223 at the end away from the transmission member 230, which protrudes from the end of the right bracket 220 away from the left bracket 210. By providing the left-hand turning part 213 and the right-hand turning part 223, the user can hold the left-hand turning part 213 and / or the right-hand turning part 223 to rotate the left adjusting screw 212 and the right adjusting screw 222, facilitating the adjustment of the interpupillary distance.
[0030] Both the left slot 211 and the right slot 221 are through holes. In this embodiment, the surgical magnifying glass also includes a left locking screw 215 and a right locking screw 225. The left locking screw 215 extends into the left slot 211 along its depth direction and is screwed onto the left connecting portion 312. The head of the left locking screw 215 abuts against the left support 210 to lock the position of the left connecting portion 312 relative to the left support 210. The right locking screw 225 extends into the right slot 221 along its depth direction and is screwed onto the right connecting portion 322. The head of the right locking screw 225 abuts against the right support 220 to lock the position of the right connecting portion 322 relative to the right support 220. Before adjusting the interpupillary distance, loosen the left locking screw 215 and the right locking screw 225. After adjusting the interpupillary distance, tighten the left locking screw 215 and the right locking screw 225 to lock the left lens assembly 310 and the right lens assembly 320 onto the left bracket 210 and the right bracket 220 to prevent lens shaking when using the surgical magnifier.
[0031] In existing related technologies, the optical axes of the left lens 311 and the right lens 321 are designed to be parallel, which cannot simulate the natural convergence angle of the human eye (approximately 2~15°), resulting in weak stereoscopic depth perception and easily causing visual errors during deep cavity surgery. In this embodiment, both the left support 210 and the right support 220 are rotatably connected to the base 100, allowing the angle between the optical axes of the left lens assembly 310 and the right lens assembly 320 to be adjustable. Specifically, the left support 210 and the right support 220 can be rotatably connected to the base 100 via pins 216. Figure 1 As shown, optionally, the deflectable angles β1 and β2 of the left support 210 and the right support 220 are both in the range of 0° to 10°. This allows the optical axis angle α between the left lens 311 and the right lens 321 to be adjusted between 0° and 20°. By adjusting the optical axis angle, the surgical magnifying glass can better match the natural focusing angle of the human eye, resulting in clearer and more realistic imaging. To accommodate the deflection of the left adjusting screw 212 and the right adjusting screw 222 caused by the rotation of the left support 210 and the right support 220, and to ensure that the transmission component 230 can effectively transmit torque between the angled left adjusting screw 212 and the right adjusting screw 222, in this embodiment, the transmission component 230 is a double universal joint. The two ends of the double universal joint can transmit torque with the left adjusting screw 212 and the right adjusting screw 222, and can also bend in multiple directions relative to the left adjusting screw 212 and the right adjusting screw 222. In alternative embodiments, the transmission element 230 may also be a flexible hose that can be bent (but must have sufficient torsional resistance to transmit torque).
[0032] Figure 3 This is an exploded view of one embodiment of the present application, omitting the left lens assembly 310 and the right lens assembly 320; Figure 4 This is a schematic diagram illustrating the engagement of the base 100 and the tooth condition 400 in one embodiment of this application. Figure 3 and Figure 4As shown, in this embodiment, the surgical magnifying glass further includes a toothed conditioner 400, which slides with the base 100. The sliding direction of the toothed conditioner 400 is perpendicular to the rotation axes of the left support 210 and the right support 220. In this embodiment, the left support 210 and the right support 220 are symmetrically arranged, and their rotation axes are parallel. The toothed conditioner 400 has two rack portions 410. A left gear 214 is fixedly provided at one end of the left support 210 connected to the base 100, and the left gear 214 coincides with the rotation axis of the left support 210. A right gear 224 is fixedly provided at one end of the right support 220 connected to the base 100, and the right gear 224 coincides with the rotation axis of the right support 220. The two rack portions 410 of the toothed conditioner 400 mesh with the left gear 214 and the right gear 224, respectively. By sliding the gear condition 400 along the base 100, the two rack parts 410 can drive the left gear 214 and the right gear 224 to rotate. The rotation of the left gear 214 and the right gear 224 can drive the left bracket 210 and the right bracket 220 to rotate relative to the base 100, thereby realizing the adjustment of the optical axis angle between the left lens 311 and the right lens 321.
[0033] Optionally, the surgical magnifying glass also includes an angle adjustment screw 500, the two ends of which are rotatably connected to the base 100, and the angle adjustment screw 500 is threadedly connected to the toothed condition 400. By rotating the angle adjustment screw 500, the toothed condition 400 can be driven to slide relative to the base 100, causing the left support 210 and the right support 220 to rotate. Furthermore, the angle adjustment screw 500 has a locking function, that is, when the angle adjustment screw 500 is not rotating, the toothed condition 400 will not slide relative to the base 100, so the swing angle of the left support 210 and the right support 220 is locked, and the included angle of the optical axes of the left lens 311 and the right lens 321 is also locked.
[0034] In this embodiment, one end of the angle adjusting screw 500 is provided with an angle adjusting screw head 510, which protrudes from the surface of the base 100. By providing the angle adjusting screw head 510, the user can easily rotate the angle adjusting screw 500 to adjust the optical axis angle. Furthermore, a retaining ring 520 is provided at the end of the angle adjusting screw 500 away from the angle adjusting screw head 510. The retaining ring 520 is clamped in the groove at the end of the angle adjusting screw 500, and can abut against the base 100 to prevent the angle adjusting screw 500 from falling off the base 100.
[0035] In this embodiment, the base 100 is provided with a receiving cavity 110, and the gear condition 400 is disposed within the receiving cavity 110. The inner wall of the receiving cavity 110 is provided with a sliding groove. The gear condition 400 also includes a sliding part 420, which slides in cooperation with the sliding groove. At least a portion of the left gear 214 and at least a portion of the right gear 224 extend into the receiving cavity 110 and mesh with the rack part 410. By providing the receiving cavity 110, the gear condition 400 can be housed, improving the compactness of the structure. By providing the sliding groove and the sliding part 420 to cooperate, the movement direction of the gear condition 400 relative to the base 100 can be restricted, preventing the gear condition 400 from rotating or translating in other directions. In other optional embodiments, the gear condition 400 can also be a toggle member with two levers, using a slot structure instead of the left gear 214 and the right gear 224. That is, when the toggle member moves, the lever structure can push the slot structure, thereby driving the left support 210 and the right support 220 to rotate.
[0036] In this embodiment, the angle adjusting screw 500 passes through the slide groove and is threadedly connected to the sliding part 420. It can be understood that the sliding direction of the sliding part 420 in the slide groove is consistent with the axial direction of the angle adjusting screw 500, so that the angle adjusting screw 500 can drive the sliding part 420 to move in the slide groove by rotating.
[0037] The working principle of the surgical magnifying glass provided in this application embodiment is as follows: Rotating the right adjustment knob rotates the right adjustment screw 222, whose threaded portion connects to the threaded hole of the right connecting part 322 of the right lens assembly 320, converting rotational motion into linear motion. This allows the right lens 321 to slide left and right along the right bracket 220, thus adjusting the interpupillary distance. Similarly, rotating the left adjustment knob allows the left lens 311 to slide left and right along the left bracket 210. The right adjustment screw 222 and the left adjustment screw 212 are connected by the transmission component 230, enabling them to rotate synchronously and at the same speed. The right adjusting screw 222 and the left adjusting screw 212 have right-hand and left-hand threads with equal pitch, respectively. Correspondingly, the threaded holes of the right connecting part 322 and the left connecting part 312 also have right-hand and left-hand threads with equal pitch. Therefore, when the transmission system consisting of the right adjusting screw 222, the transmission component 230, and the left adjusting screw 212 rotates, the right lens assembly 320 and the left lens assembly 310 move closer or further apart synchronously, thus achieving synchronous adjustment of the interpupillary distance of the two lenses. The threaded portion of the angle adjusting screw 500 connects to the threaded hole of the gear condition 400. By rotating the angle adjusting screw 510 on the angle adjusting screw 500, the rotational motion can be converted into linear motion, and the gear condition 400 moves back and forth within the receiving cavity 110. When the gear condition 400 moves, the rack part 410 can drive the left gear 214 and the right gear 224 to rotate, thereby driving the left support 210 and the right support 220 to rotate. Therefore, by rotating the angle adjustment screw 500, the left bracket 210 and the right bracket 220 can be adjusted synchronously relative to the centerline. Due to the double universal joint of the transmission component 230, torque can also be transmitted when the left adjustment screw 212 and the right adjustment screw 222 are at an angle, so that the two rotate synchronously, that is, the pupil distance synchronous adjustment function can also be effective.
[0038] In summary, this application provides a surgical magnifying glass, including a base 100, a left support 210, a right support 220, a left adjusting screw 212, a right adjusting screw 222, a transmission component 230, a left lens assembly 310, and a right lens assembly 320. The left support 210 and the right support 220 are respectively disposed on opposite sides of the base 100. The left adjusting screw 212 is rotatably disposed on the left support 210, and the right adjusting screw 222 is rotatably disposed on the right support 220. The left lens assembly 310 is connected to the left support. The left adjusting screw 210 slides with the right adjusting screw 222 in the same direction as the axis of the left adjusting screw 212. The right lens assembly 320 slides with the right support 220 in the same direction as the axis of the right adjusting screw 222. The left adjusting screw 212 is threaded to the left lens assembly 310, and the right adjusting screw 222 is threaded to the right lens assembly 320. The adjacent ends of the left adjusting screw 212 and the right adjusting screw 222 are connected by a transmission component 230 to achieve synchronous rotation of the left adjusting screw 212 and the right adjusting screw 222. The surgical magnifying glass provided in this application embodiment allows the left adjusting screw 212 and the right adjusting screw 222 to rotate synchronously by turning the left adjusting screw 212 and / or the right adjusting screw 222. Since the left lens assembly 310 and the right lens assembly 320 are respectively threaded to the left adjusting screw 212 and the right adjusting screw 222, they can be driven to move closer to each other or further away from each other, thereby achieving interpupillary distance adjustment. As can be seen, the surgical magnifying glass of this application only needs to adjust one of the left adjustment screw 212 or the right adjustment screw 222 to achieve synchronous adjustment of the left lens assembly 310 and the right lens assembly 320, thereby changing the interpupillary distance. The adjustment method is simple and efficient, and because it is a synchronous adjustment on both sides, it has good symmetry.
[0039] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.
Claims
1. A surgical magnifying glass, characterized in that, The device includes a base, a left bracket, a right bracket, a left adjusting screw, a right adjusting screw, a transmission component, a left lens assembly, and a right lens assembly. The left and right brackets are respectively disposed on opposite sides of the base. The left adjusting screw is rotatably disposed on the left bracket, and the right adjusting screw is rotatably disposed on the right bracket. The left lens assembly slides with the left bracket, and the sliding direction is consistent with the axial direction of the left adjusting screw. The right lens assembly slides with the right bracket, and the sliding direction is consistent with the axial direction of the right adjusting screw. The left adjusting screw is threadedly connected to the left lens assembly, and the right adjusting screw is threadedly connected to the right lens assembly. The adjacent ends of the left and right adjusting screws are connected through the transmission component to achieve synchronous rotation of the left and right adjusting screws.
2. The surgical magnifying glass according to claim 1, characterized in that, Both the left and right brackets are rotatably connected to the base, so that the optical axis angle between the left and right lens assemblies is adjustable, and the transmission component is a double universal joint.
3. The surgical magnifying glass according to claim 2, characterized in that, The surgical magnifying glass also includes a toothed fitting, which slides in conjunction with the base. The sliding direction of the toothed fitting is perpendicular to the rotation axes of the left and right supports. The toothed fitting has two rack portions. A left gear is fixedly installed at one end of the left support connected to the base, and the left gear coincides with the rotation axis of the left support. A right gear is fixedly installed at one end of the right support connected to the base, and the right gear coincides with the rotation axis of the right support. The two rack portions of the toothed fitting mesh with the left gear and the right gear, respectively.
4. The surgical magnifying glass according to claim 3, characterized in that, The surgical magnifying glass also includes an angle adjustment screw, the two ends of which are rotatably connected to the base, and the angle adjustment screw is threadedly connected to the gear.
5. The surgical magnifying glass according to claim 4, characterized in that, The base is provided with a receiving cavity, the gear is disposed in the receiving cavity, the inner wall of the receiving cavity is provided with a sliding groove, the gear also includes a sliding part, the sliding part slides in cooperation with the sliding groove, at least a part of the left gear and at least a part of the right gear extend into the receiving cavity and mesh with the rack part.
6. The surgical magnifying glass according to claim 5, characterized in that, The angle adjusting screw passes through the slide groove and is threadedly connected to the sliding part.
7. The surgical magnifying glass according to claim 4, characterized in that, One end of the angle adjusting screw is provided with an angle adjusting screw part, which protrudes from the surface of the base.
8. The surgical magnifying glass according to any one of claims 1-7, characterized in that, The left bracket is provided with a left strip hole. The left lens assembly includes a left lens and a left connecting part connected to the left lens. The left connecting part is inserted into the left strip hole and can slide along the left strip hole. The left adjusting screw passes through the left strip hole along the length direction of the left strip hole and is threadedly connected to the left connecting part. The right bracket is provided with a right strip hole. The right lens assembly includes a right lens and a right connecting part connected to the right lens. The right connecting part is inserted into the right strip hole and can slide along the right strip hole. The right adjusting screw passes through the right strip hole along the length direction of the right strip hole and is threadedly connected to the right connecting part.
9. The surgical magnifying glass according to claim 8, characterized in that, The surgical magnifying glass also includes a left locking screw and a right locking screw. The left locking screw extends into the left slot along the depth direction of the left slot and is screwed into the left connecting part. The head of the left locking screw is used to abut against the left bracket to lock the position of the left connecting part relative to the left bracket. The right locking screw extends into the right slot along the depth direction of the right slot and is screwed into the right connecting part. The head of the right locking screw is used to abut against the right bracket to lock the position of the right connecting part relative to the right bracket.
10. The surgical magnifying glass according to any one of claims 1-7, characterized in that, The left adjusting screw is provided with a left-handing part at the end away from the transmission component, and the left-handing part protrudes from the end of the left bracket away from the right bracket; And / or, the right adjusting screw is provided with a right-hand turning part at the end away from the transmission member, and the right-hand turning part protrudes from the end of the right bracket away from the left bracket.