A bidirectionally adjustable observation head for surgical microscope

Abstract

The invention discloses a bidirectionally adjustable surgical microscope observation head, comprising a connection seat and hinged mirror seats symmetrically arranged on both sides of the upper end thereof, a steering mirror seat being arranged between the hinged mirror seats, the upper end of the steering mirror seat being rotatably connected to a rotating seat through a supporting shaft, two composite prism seats being arranged on the rotating seat, the lower ends of the two composite prism seats being rotatably arranged on the steering mirror seat, and a transmission component for driving the two composite prism seats to rotate is also arranged on the steering mirror seat. The invention uses a single-hand wheel control, which can be operated with one hand, and is convenient and fast. The invention uses a small-modulus precision gear rack one-with-two mutual transmission mode, and the interpupillary distance can be adjusted by a single-hand wheel in the middle, with the gear driving the rack, and the interpupillary distance can also be adjusted by turning the left or right composite prism seat, with the rack driving the gear, and the interpupillary distance can be adjusted in two directions, which is convenient to operate and has functional guarantee, and is suitable for different operation requirements.

Description

Technical Field

[0001] The invention relates to the technical field of medical microscope equipment, in particular to a bidirectionally adjustable surgical microscope observation head. Background Art

[0002] Medical microscopes are widely used in many fields such as ophthalmology, otolaryngology, stomatology, surgery, neurosurgery, gynecology, etc. For operators of medical microscopes, the distance between the eyepieces needs to be changed to suit different operators due to the difference in pupil distance of each person. The pupil distance of a person varies from about 48mm to 78mm, so the eyepiece must be infinitely adjustable within this range to facilitate operators with different pupil distances. Most of the surgical microscopes are used by doctors during surgery. Doctors not only have requirements for sterilized instruments and equipment, but also require stable and convenient operation. With the development of medical technology, the requirements for the accuracy and comfort of instruments have also increased.

[0003] One existing technology is that screw sleeves with positive and negative threads are fixed to the bottom of the composite prism seats on both sides, and an operating crossbar passes through the screw sleeves on both sides horizontally. The operating crossbar has a left and a right external thread. When the operating knob is rotated, the thread cooperates to make the composite prism seats on both sides open and close within the moving range, thereby realizing the adjustment of the pupil distance. The operating knob is covered with a silicone sleeve for easy removal and disinfection. Another existing single-hand wheel pupil distance adjustment mechanism is that a fixed rod is respectively installed on the left and right composite prism seats, and the other end of the fixed rod is placed on a turbine structure connected to the hand wheel. During the rotation of the hand wheel, the fixed rod is driven to move in the guide rail of the turbine, thereby achieving the purpose of moving the left and right composite prism seats and adjusting the pupil distance. The disadvantage is that when the turbine is driven, the rotation movement process is not smooth enough, and the parts are easily worn out. The pupil distance can only be controlled by turning the knob, and the composite prism seat cannot be directly turned.

[0004] In order to further simplify the operation and improve the accuracy and comfort of the product, a compact single-handwheel interpupillary distance adjustment mechanism has been developed. The single-handwheel is mainly used for operation, and the left or right compound lens seat can also be turned by one hand for operation. The handwheel is equipped with a sterilizable silicone sleeve, which can be used by doctors during surgery. The handwheel can be disinfected and operated directly. If it is not sterilized, the compound prism seat can be directly turned for adjustment. Summary of the invention

[0005] The object of the present invention is to provide a bidirectionally adjustable surgical microscope observation head to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A bidirectionally adjustable surgical microscope observation head, comprising a connection seat and hinge mirror seats symmetrically arranged on both sides of the upper end thereof, a steering mirror seat is arranged between the hinge mirror seats, fixed shafts at both ends of the steering mirror seat are rotatably connected to the hinge mirror seat, the steering mirror seat can be rotatably connected around the fixed shaft, a rotating seat is rotatably connected to the upper end of the steering mirror seat through a supporting shaft, two composite prism seats are arranged on the rotating seat, each composite prism seat is provided with a lens barrel at the upper end, an eyepiece is provided at the upper end of the lens barrel for convenient observation by staff, the lower ends of the two composite prism seats are rotatably arranged on the steering mirror seat, and a transmission component for driving the two composite prism seats to rotate is also arranged on the steering mirror seat;

[0008] The transmission assembly includes a main fixed seat arranged on a rotating seat, a cover plate is detachably provided on the upper end of the main fixed seat, two horizontally staggered sliding grooves are provided on the main fixed seat, a U-groove moving block is slidably matched in each sliding groove, a U-groove corresponding to the composite prism seat is provided on one side surface of each U-groove moving block, and a rack is connected to the other side surface of each U-groove moving block through a snap assembly, a fixing frame is also provided on the surface of the main fixed seat where the U-groove moving block is located, a gear member is penetrated in the mounting hole on the fixing frame, and the gear part of the gear member is meshed with the two racks on the U-groove moving block;

[0009] A linkage mechanism is provided between each U-groove moving block and the corresponding composite prism seat, and the linkage mechanism is used to cooperate with the U-groove moving block to apply a rotational force to the composite prism seat to drive the composite prism seat to turn.

[0010] As a further solution of the present invention: the end of the gear member is detachably provided with a hand wheel for easy hand-holding.

[0011] As a further solution of the present invention: the shaft portion of the gear member is rotatably connected to the fixing frame via a bearing.

[0012] As a further solution of the present invention: the linkage mechanism includes a swing shaft with one end fixedly connected to the composite prism seat, the other end of the swing shaft is a rod-shaped structure, and the surface of the U-groove moving block is provided with a U-groove for easy embedding of the rod-shaped structure.

[0013] As a further solution of the present invention: the buckle assembly includes a columnar block arranged on the rack and a columnar groove arranged on the U-groove moving block, and the columnar groove and the columnar block cooperate with each other.

[0014] As a further solution of the present invention: a silicone disinfection sleeve is provided on the hand wheel.

[0015] As a further solution of the present invention: one end of the cover plate is fixed with screws above the middle of the left and right composite prism seats and the other end is connected to the main fixing seat. The bottom of the main fixing seat is fixed to the connecting block with screws, and the connecting block is fixed to the rotating seat with screws.

[0016] As a further solution of the present invention: a scale line is provided in the middle of one side of the cover plate close to the hand wheel, and a scale ring is provided at the end of the hand wheel close to the cover plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses a single-hand wheel control, which can be operated with only one hand, which is convenient and quick.

[0018] 2. The present invention uses a small-modulus precision gear rack with two mutual transmission methods. The interpupillary distance can be adjusted by a single hand wheel in the middle, with the gear driving the rack, or the left or right compound prism seat can be turned to adjust the interpupillary distance, with the rack driving the gear. It is bidirectionally adjustable, easy to operate and functional, and suitable for different operating requirements.

[0019] 3. The present invention uses a small-module gear rack transmission, which is ground and matched to make the rotation easy and the movement process comfortable.

[0020] 4. The present invention has a compact structure, a single hand wheel is located in the common space of the left and right observation groups, has a strong integrity and a small appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] Figure 2 It is a side view of the present invention.

[0023] Figure 3 It is a schematic diagram of the exploded structure of the transmission component in the present invention.

[0024] Figure 4 This is a partial enlarged diagram of the relationship between pupil distance changes in the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of the transmission component and the composite prism seat in the present invention.

[0026] Among them: cover plate 1, main fixing seat 2, fixing frame 3, hand wheel 4, gear part 5, rack 6, U-groove moving block 7, connecting block 8, swing shaft 9, disinfection sleeve 10, eyepiece 11, lens barrel 12, compound prism seat 13, rotating seat 14, steering lens seat 15, hinge lens seat 16, connecting seat 17. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-5 In an embodiment of the present invention, a bidirectionally adjustable surgical microscope observation head includes a socket 17 and hinge mirror seats 16 symmetrically arranged on both sides of the upper end thereof, a steering mirror seat 15 is arranged between the hinge mirror seats 16, the fixed shafts at both ends of the steering mirror seat 15 are rotatably connected to the hinge mirror seat 16, the steering mirror seat 15 can be rotatably connected around the fixed shaft, the upper end of the steering mirror seat 15 is rotatably connected to a rotating seat 14 through a supporting shaft, two composite prism seats 13 are arranged on the rotating seat 14, each composite prism seat 13 is provided with a lens barrel 12 at the upper end, the lens barrel 12 is provided with an eyepiece 11 for convenient observation by the staff, the lower ends of the two composite prism seats 13 are rotatably arranged on the steering mirror seat 15, and the steering mirror seat 15 is also provided with a transmission component for driving the two composite prism seats 13 to rotate;

[0032] Figure 3 As shown, the transmission assembly includes a main fixed seat 2 arranged on a rotating seat 14, the upper end of the main fixed seat 2 is detachably provided with a cover plate 1, the main fixed seat 2 is provided with two horizontally staggered sliding grooves, each sliding groove is slidably matched with a U-groove moving block 7, one side surface of each U-groove moving block 7 is provided with a U-groove corresponding to the composite prism seat 13, and the other side surface is connected with a rack 6 through a snap assembly, and a fixing frame 3 is also mounted on the surface of the main fixed seat 2 where the U-groove moving block 7 is located, and a gear member 5 is penetrated through the mounting hole on the fixing frame 3, the rod body part of the gear member 5 is rotatably connected to the fixing frame 3 through a bearing, and the gear part of the gear member 5 is meshed with the two racks 6 on the U-groove moving block 7, and a hand wheel 4 that is easy to hold is detachably provided at the end of the gear member 5, and the hand wheel 4 is used to drive the gear member 5 to rotate. Since the two racks 6 here are distributed on the upper and lower sides of the gear member 5, this staggered meshing method enables the two racks 6 to drive the U-groove moving block 7 to move relative to or toward each other under gear transmission;

[0033] A linkage mechanism is provided between each U-groove moving block 7 and the corresponding composite prism seat 13 , and the linkage mechanism is used to cooperate with the U-groove moving block 7 to apply a rotational force to the composite prism seat 13 to drive the composite prism seat 13 to turn, thereby completing the adjustment of the distance between the two eyepieces 11 .

[0034] The linkage mechanism includes a swing shaft 9 with one end fixedly connected to the composite prism seat 13, and the other end of the swing shaft 9 is a rod-shaped structure. The surface of the U-groove moving block 7 is provided with a U-groove for easy embedding of the rod-shaped structure. When the U-groove moving block 7 slides, the U-groove will generate a force on the rod-shaped structure, thereby providing a driving force for the rotation of the composite prism seat 13.

[0035] The snap-fit ​​assembly includes a cylindrical block arranged on the rack 6 and a cylindrical groove arranged on the U-groove moving block 7. The cylindrical groove and the cylindrical block cooperate with each other. During actual installation, the cylindrical block is inserted into the cylindrical groove to complete the detachable connection between the rack 6 and the U-groove moving block 7.

[0036] The hand wheel 4 is covered with a silicone disinfection sleeve 10 .

[0037] One end of the cover plate 1 is fixed to the upper part between the left and right composite prism seats 13 by screws, and the other end is connected to the main fixing seat 2. The bottom of the main fixing seat 2 is fixed to the connecting block 8 by screws, and the connecting block 8 is fixed to the rotating seat 14 by screws.

[0038] The following is the calculation of pupil distance, such as Figure 4 shown.

[0039] L is 1 / 2 of the pupil distance;

[0040] The horizontal distance from the left prism seat rotation center O to the handwheel axis is D;

[0041] The distance from the left prism seat rotation center O to the fixed axis center O1 is b;

[0042] The distance from the left prism seat rotation center O to the eyepiece center O2 is a;

[0043] The distance from the eyepiece center O2 to the fixed axis O1 is c;

[0044] a, b, c are constants, and the angle between a, b, c is also a constant;

[0045] The angle between b and the horizontal handwheel axis is α: taking the horizontal handwheel axis as the reference, when the pupil distance increases, α is positive; when it decreases, α is negative.

[0046] The radius of the gear base circle is r;

[0047] When the handwheel rotates Δθ, the gear also rotates Δθ, then the rack meshing movement distance is Δθ*r, and the movement distance perpendicular to the handwheel axis is equal to the fixed axis and is also Δθ*r;

[0048] Taking the horizontal handwheel axis as the reference, the handwheel rotation angle is Δθ;

[0049] Then the following function is obtained after conversion:

[0050] L=a*sin(π-β+arcsin(Δθ*r / b))+DThe angle units are all radians;

[0051] Due to bilateral symmetry, the pupil distance is 2L.

[0052] Interpupillary distance: 2L=2(a*sin(π-β+arcsin(Δθ*r / b))+D);

[0053] The variation range of pupil distance 2L is {48, 78} mm. By dividing the sub-range into N equal parts, N values ​​of pupil distance 2L can be obtained, and correspondingly, N values ​​of D and Δθ can be obtained. These values ​​are listed in a table and plotted on the hand wheel to mark the pupil distance.

[0054] Example 2

[0055] There is a scale line in the middle of one side of the cover plate 1 close to the hand wheel 4, and there is a scale ring on the end of the hand wheel 4 close to the cover plate 1. When the hand wheel 4 is turned, the scale line on the cover plate 1 corresponds to the reading on the scale ring of the hand wheel 4, which is the pupil distance.

[0056] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bidirectionally adjustable surgical microscope observation head, comprising a connection seat (17) and hinge mirror seats (16) symmetrically arranged on both sides of the upper end thereof, a steering mirror seat (15) being arranged between the hinge mirror seats (16), fixed shafts at both ends of the steering mirror seat (15) being rotatably connected to the hinge mirror seat (16), the steering mirror seat (15) being rotatably connected around the fixed shaft, a rotating seat (14) being rotatably connected to the upper end of the steering mirror seat (15) via a supporting shaft, two composite prism seats (13) being arranged on the rotating seat (14), each composite prism seat (13) being provided with a lens barrel (12) at the upper end, an eyepiece (11) being provided at the upper end of the lens barrel (12) for convenient observation by a staff member, the lower ends of the two composite prism seats (13) being rotatably arranged on the steering mirror seat (15), and a transmission assembly for driving the two composite prism seats (13) to rotate is also arranged on the steering mirror seat (15); It is characterized in that The transmission assembly comprises a main fixed seat (2) arranged on a rotating seat (14); a cover plate (1) is detachably provided on the upper end of the main fixed seat (2); two horizontally staggered sliding grooves are provided on the main fixed seat (2); a U-groove moving block (7) is slidably matched in each sliding groove; a U-groove corresponding to the composite prism seat (13) is provided on one side surface of each U-groove moving block (7); a rack (6) is connected to the other side surface via a snap assembly; a fixed frame (3) is also provided on the surface of the main fixed seat (2) where the U-groove moving block (7) is located; a gear member (5) is inserted into the mounting hole on the fixed frame (3); a gear part of the gear member (5) is meshed with the two racks (6) on the U-groove moving block (7); A linkage mechanism is provided between each U-groove moving block (7) and the corresponding composite prism seat (13), and the linkage mechanism is used to cooperate with the U-groove moving block (7) to apply a rotational force to the composite prism seat (13) to drive the composite prism seat (13) to turn; The linkage mechanism comprises a swing shaft (9) having one end fixedly connected to the composite prism seat (13), the other end of the swing shaft (9) being a rod-shaped structure, and a U-groove for facilitating the embedding of the rod-shaped structure on the surface of the U-groove moving block (7); The buckle assembly comprises a columnar block arranged on the rack (6) and a columnar groove arranged on the U-groove moving block (7), and the columnar groove and the columnar block cooperate with each other.

2. The bidirectionally adjustable surgical microscope observation head according to claim 1, characterized in that: The end of the gear member (5) is detachably provided with a hand wheel (4) that is convenient for hand holding.

3. The bidirectionally adjustable surgical microscope observation head according to claim 1, characterized in that: The shaft portion of the gear member (5) is rotatably connected to the fixing frame (3) via a bearing.

4. The bidirectionally adjustable surgical microscope observation head according to claim 2, characterized in that: The hand wheel (4) is covered with a silica gel disinfection sleeve (10).

5. The bidirectionally adjustable surgical microscope observation head according to claim 1, characterized in that: One end of the cover plate (1) is fixed to the upper part between the left and right composite prism seats (13) by screws, and the other end is connected to the main fixing seat (2). The bottom of the main fixing seat (2) is fixed to the connecting block (8) by screws, and the connecting block (8) is fixed to the rotating seat (14) by screws.

6. The bidirectionally adjustable surgical microscope observation head according to claim 2, characterized in that: A scale line is provided in the middle of one side of the cover plate (1) close to the hand wheel (4), and a scale ring is provided at the end of the hand wheel (4) close to the cover plate (1).

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