Handle control device and ophthalmic medical apparatus

Abstract

The application provides a handle control device and an ophthalmic medical equipment, which comprises an operating handle and a ball head connecting structure, the operating handle has a ball head structure, and the ball head connecting structure comprises a connecting main body and a positioning guide piece; the connecting main body comprises an outer fixing piece, an inner fixing piece, an elastic piece and a limiting piece, the limiting piece is arranged on the outer fixing piece, the inner fixing piece and the elastic piece are arranged in a mounting cavity of the outer fixing piece, the outer fixing piece has a first limiting surface, the inner fixing piece has a second limiting surface, the first limiting surface and the second limiting surface abut against the ball head structure under the action of the compressed elastic piece, the first limiting surface and the second limiting surface are spaced apart along a first central axis of the connecting main body and are located on two sides of a large circle corresponding to the ball head structure; and the positioning guide piece is used for restricting the freedom of relative rotation around the first central axis between the outer fixing piece and the ball head structure. In the application, the operating handle has no looseness, the control precision is high, and the tightness degree is not affected by manual assembly.

Description

Technical Field

[0001] This application relates to the field of ophthalmic medical devices, specifically to a handle control device and an ophthalmic medical device. Background Technology

[0002] Ophthalmic medical devices are used to examine or treat the eyes and can include slit lamps, ophthalmic OCT (optical coherence tomography), ophthalmic AI screening machines, ophthalmic surgical microscopes, or fundus laser treatment devices. In ophthalmic medical devices, the parts that functionally interact with the eye (such as image acquisition modules used to obtain corneal image information) are often designed with adjustable structures to ensure precise alignment with the eye; these functionally related parts are defined as the controlled devices.

[0003] One approach to solving the position adjustment problem of a controlled device is to use a handle control device. This involves controlling the three degrees of freedom of the controlled device through the operation of the handle and its associated mechanical structure. However, some commercially available products suffer from loose handles due to structural design flaws, negatively impacting control accuracy and resulting in a poor user experience.

[0004] Application content

[0005] The purpose of this application is to provide a robust handle control device with uniform tightness, which solves the problem of poor control accuracy caused by loose operating handle.

[0006] The purpose of this application is also to provide an ophthalmic medical device including the handle control device described above.

[0007] To address the aforementioned problems, this application provides the following technical solution.

[0008] In a first aspect, this application provides a handle control device, including an operating handle and a ball joint connection structure, wherein the operating handle includes a first connecting portion having a ball joint structure, and the ball joint connection structure includes a connecting body and a positioning guide;

[0009] The connecting body includes an external fixator, an internal fixator, an elastic member, and a limiting member. The limiting member is fixed to the external fixator. The internal fixator and the elastic member are disposed in the mounting cavity of the external fixator. The external fixator has a first limiting surface, and the internal fixator has a second limiting surface. The first limiting surface and the second limiting surface abut against the ball head structure under the action of the compressed elastic member. The first limiting surface and the second limiting surface are distributed at intervals along the first central axis of the connecting body and are located on both sides of the large circle corresponding to the spherical surface of the ball head structure.

[0010] The positioning guide is used to constrain the degree of freedom of relative rotation between the external fixing member and the ball head structure about the first central axis.

[0011] Optionally, the external fixing member includes a fixing outer ring having the mounting cavity, one end of the fixing outer ring having the first limiting surface, and the other end being detachably connected to the limiting member, and the positioning guide is positioned on the fixing outer ring.

[0012] Optionally, the inner wall of the mounting cavity includes an inner cylindrical surface section and an inner conical surface section, the diameter of the inner cylindrical surface section is larger than the diameter of the inner conical surface section, the inner fixing member and the elastic member are disposed in the space corresponding to the inner cylindrical surface section, and the first limiting surface is located on the inner conical surface section;

[0013] The fixed outer ring has a boss that separates the outer surface of the fixed outer ring into a first outer cylindrical surface section and a second outer cylindrical surface section. The first outer cylindrical surface section is used as a bearing mounting surface, and the second outer cylindrical surface section is used as a drive wheel mounting surface.

[0014] Optionally, the limiting member includes an annular limiting cap, which is detachably connected to the end face of the external fixing member by fasteners.

[0015] Optionally, the inner fixing member includes a fixing inner ring, the fixing inner ring includes an inner ring body and a retaining ring, the top outer surface of the inner ring body protrudes outward to form the retaining ring, the elastic member is disposed between the inner ring body and the wall of the mounting cavity and abuts against the retaining ring; the inner surface of the inner ring body is provided with a second limiting surface, the second limiting surface being a conical surface.

[0016] Optionally, the elastic element is sleeved on the inner fixing element, and the elastic element is a helical spring.

[0017] Optionally, the positioning guide is columnar, with one end of the positioning guide fixedly or rotatably connected to the external fixing member, and the other end of the positioning guide being guided to the positioning guide groove on the ball head structure.

[0018] Optionally, the ball head structure is provided with a positioning guide groove, the length direction of which is the direction of the first central axis.

[0019] Optionally, the operating handle includes a multi-directional translational spindle and a multi-directional rotational spindle. The multi-directional translational spindle passes through and is rotatably connected to the multi-directional rotational spindle. The multi-directional rotational spindle has a first connecting part, and the multi-directional translational spindle has a second connecting part. The second connecting part and the base of the handle control device form a three-degree-of-freedom ball-and-socket joint structure. The operating handle drives the ball-head connection structure to perform translational motion in a first plane by rotating around the second connecting part as a fulcrum. The operating handle drives the ball-head connection structure to output rotational motion about the first central axis by rotating the multi-directional rotational spindle relative to the multi-directional translational spindle.

[0020] Optionally, the handle control device further includes a first load, a transmission mechanism, and a second load disposed on the first load. The first load is movably connected to the external fixing member via a bearing, and the axis of the bearing is the first central axis. The transmission mechanism is used to convert the rotational motion of the ball joint connection structure into the linear motion of the second load.

[0021] In a second aspect, this application provides an ophthalmic medical device that includes a handle control device as described in the first aspect.

[0022] Compared with the prior art, this application has the following beneficial effects:

[0023] 1. In this application, under the action of the elastic element, the first limiting surface and the second limiting surface abut against the ball head structure of the operating handle respectively, and the first limiting surface and the second limiting surface are distributed on both sides of the large circle corresponding to the ball head structure, constraining all displacement degrees of freedom of the ball head structure. The operating handle can rotate relative to the ball head connection structure, but does not produce displacement, so the operating handle will not loosen relative to the ball head connection structure, thereby ensuring the control accuracy of the handle control device.

[0024] 2. In this application, the positions of the external fixing part and the limiting part are relatively fixed. The elastic force of the elastic part is used to make the first limiting surface and the second limiting surface movably connected with the ball head structure. The mechanical parameters of the elastic part can be calculated according to the design requirements. Therefore, the tightness of the ball head connection structure and the operating handle after connection is determined and is not affected by manual installation. The tightness of each handle control device obtained after assembly is more uniform. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the handle control device according to an embodiment of this application from one perspective, in which part of the transmission mechanism and the second load are omitted.

[0026] Figure 2This is a schematic diagram of the handle control device according to an embodiment of this application from another perspective, in which part of the transmission mechanism and the second load are omitted.

[0027] Figure 3 This is a cross-sectional view of a handle control device according to an embodiment of this application, in which part of the transmission mechanism and the second load are omitted.

[0028] Figure 4 This is a cross-sectional view of a handle control device according to an embodiment of this application, in which part of the transmission mechanism and the second load are omitted.

[0029] Figure 5 This is an exploded view of a handle control device according to an embodiment of this application, in which part of the transmission mechanism and the second load are hidden. In addition, the dashed lines in the figure are used for auxiliary marking.

[0030] Figure label:

[0031] 1. Base; 11. Wear-resistant support plate; 111. Rotating hole; 112. Support protrusion; 113. Friction protrusion; 114. Ring; 2. Operating handle; 21. Multi-directional rotary spindle; 211. First connecting part; 212. Positioning guide groove; 22. Multi-directional translational spindle; 221. Second connecting part; 3. Ball joint connection structure; 31. Connecting body; 311. First limiting surface; 312. Second limiting surface; 313. External fixing part; 3131. Mounting cavity; 3132. Inner cylindrical surface section; 3133. Inner conical surface Section; 3134, Boss; 3135, First outer cylindrical surface section; 3136, Second outer cylindrical surface section; 314, Internal fixing component; 3141, Internal fixing part; 31411, Inner ring body; 31412, Retaining ring; 3142, Elastic part; 315, Limiting part; 3151, Limiting cover; 32, Positioning guide part; 4, First load; 41, Multi-directional moving platform; 42, Washer; 43, Fixed bracket; 431, Annular plate; 432, Support leg; 5, Transmission mechanism; 51, Drive wheel; 6, Wear-resistant plate. Detailed Implementation

[0032] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] This application provides an ophthalmic medical device for detecting or treating the eyes. The ophthalmic medical device may be a slit lamp, ophthalmic OCT (optical coherence tomography), biometer, corneal topography instrument, ophthalmic AI screening machine, fundus camera, or fundus laser treatment instrument, etc., equipped with an operating handle.

[0034] The ophthalmic medical device according to embodiments of this application includes a controlled device and a handle control device. The controlled device may be a part functionally associated with the eye, such as an image acquisition module used to acquire corneal image information. The handle control device is used to adjust the position of the controlled device to ensure precise alignment between the controlled device and the eye.

[0035] Combination Figure 1-5 Understanding. This application provides a handle control device for the above-described handle, which includes a base 1, an operating handle 2, a ball joint connection structure 3, a first load 4, a transmission mechanism 5, and a second load disposed on the first load 4. The operating handle 2 is movably connected to both the base 1 and the ball joint connection structure 3. Pushing the operating handle 2 forward, backward, left, and right drives the ball joint connection structure 3 to translate relative to the base 1 on a first plane. Rotating the operating handle 2 drives the ball joint connection structure 3 to output rotational motion about a first central axis, wherein the first central axis is as follows: Figure 3 As shown by the dotted line, the first plane is in Figure 3 On the horizontal plane, the first central axis is perpendicular to the first plane; the first load 4 is movably connected to the ball joint connection structure 3 and can drive the second load to move in translation along with the ball joint connection structure 3, and can also drive the transmission mechanism 5 to move in translation at the same time; the transmission mechanism 5 is used to convert the rotational motion into linear motion of the second load in the direction perpendicular to the first plane.

[0036] In this embodiment, the ball joint connection structure 3 outputs translational and rotational motion via the operating handle 2. The first load 4 transmits the translational motion to the second load, and the transmission mechanism 5 converts the rotational motion into linear motion of the second load. Accordingly, the operating handle 2 can control the three degrees of freedom of the second load, thereby controlling the three degrees of freedom of the controlled device mounted on the second load. Considering practical applications, when the distance between the person and the equipment is far, the person actively adapts to the equipment; when the distance between the person and the equipment is close and fine adjustments are needed, the operating handle 2 is used to control the device for alignment, achieving fine adjustment. Consequently, the amplitude of the translational and linear motion of the controlled device is relatively small.

[0037] In this embodiment, the base 1 serves as a support member for the handle control device, such as... Figure 1 , Figure 3 as well as Figure 4 As shown, the base 1 can be placed horizontally. Correspondingly, the first plane is a horizontally set surface, and the first central axis is a vertical axis. The controlled device ultimately obtains two degrees of freedom of displacement in the horizontal direction and one degree of freedom of displacement in the vertical direction.

[0038] In this embodiment, the base 1 includes a wear-resistant support plate 11, and a ball-and-socket joint structure is formed between the wear-resistant support plate 11 and the operating handle 2, so that the operating handle 2 obtains three rotational degrees of freedom, thereby enabling control of multiple displacement degrees of freedom of the second load by rotating the operating handle 2. Figure 3 As shown, the central area of ​​the wear-resistant support plate 11 has a rotating hole 111. The rotating hole 111 and the spherical structure on the operating handle 2 form a ball-and-socket joint structure. Of course, as an alternative to these two embodiments, the operation can also be reversed, that is, the spherical structure is set on the wear-resistant support plate 11 and the rotating hole 111 is set on the operating handle 2.

[0039] In this embodiment, the wear-resistant support plate 11 can be used in conjunction with the wear-resistant plate 6. The wear-resistant plate 6 is used as an installation reference, and the wear-resistant support plate 11 is placed on the wear-resistant plate 6. The wear-resistant support plate 11 and the wear-resistant plate 6 are not fixedly connected, but the coefficient of friction at the contact point between the two is relatively high, and the static friction between the two is used to maintain the stability of the connection.

[0040] like Figure 3 As shown, the wear-resistant support plate 11 is provided with a support protrusion 112, which is positioned directly opposite the rotation hole 111. The wear-resistant support plate 11 is mounted on the wear-resistant plate 6 (i.e., the mounting reference) via the support protrusion 112. Compared to attaching the entire lower surface of the wear-resistant support plate 11 to the wear-resistant plate 6, providing the support protrusion 112 to connect the wear-resistant plate 6 can achieve greater stress at the contact point between the two. Of course, in some other embodiments, as an alternative, the entire lower surface of the wear-resistant support plate 11 is in contact with the wear-resistant plate 6, or multiple protrusions are additionally provided on the wear-resistant support plate 11 to connect the wear-resistant plate 6, which is also within the scope of protection of this application.

[0041] In this embodiment, the wear-resistant support plate 11 also has a plurality of friction protrusions 113 on the side opposite to the support protrusion 112. The friction protrusions 113 are fitted together with the first load 4 and can slide relative to it. The friction protrusions 113 are in contact with the first load 4 and provide support for the first load 4, thereby improving the stability of the first load 4.

[0042] Continue to refer to Figure 3The wear-resistant support plate 11 has a circular outer contour. The support protrusion 112 and the rotating hole 111 are located at the center of the wear-resistant support plate 11. That is, the position where the circular wear-resistant support plate 11 connects to the wear-resistant plate 6 and the position where the operating handle 2 is used as a fulcrum are located in the central area, thereby improving the stability of the wear-resistant support plate 11 and also contributing to the reliability of the equipment. The wear-resistant support plate 11 also has an upwardly protruding ring 114, which increases the length of the rotating hole 111, preventing the operating handle 2 from falling off and improving the reliability of the equipment. The upper surface of the friction protrusion 113 is flat, which facilitates sliding connection with the first load 4. The side and the upper surface are smoothly connected by an arc surface, which can prevent the first load 4 from getting stuck and allow the first load 4 to have slight swaying relative to the horizontal plane, thus improving the reliability of the equipment. Figure 3 As shown, each friction bump 113 is generally circular, the same size, and evenly arranged around the ring 114 to ensure the uniformity of force on the wear-resistant support plate 11 and improve the stability and reliability of the handle control device. In other embodiments, the shape and arrangement of the friction bump 113 can be adjusted.

[0043] In the embodiments of this application, such as Figures 3 to 5 As shown, the operating handle 2 has a first connecting part 211 and a second connecting part 221 that are rotatably connected. The axis of rotation between the two is a second central axis, which is located along the length of the operating handle 2. Figure 3 When the operating handle 2 is placed vertically, the second central axis and the first central axis coincide. However, when the operating handle 2 rotates relative to the ball joint connecting structure 3 (the rotation method is determined by the first connecting part 211), the second central axis and the first central axis no longer coincide, and they intersect. The first connecting part 211 connects to the ball joint connecting structure 3, and the second connecting part 221 connects to the base 1. When the operating handle 2 is rotated, the first connecting part 211 rotates, causing the ball joint connecting structure 3 to rotate synchronously. The second connecting part 221, which is connected to the multi-directional translational main shaft 22 located inside the operating handle 2, remains stationary, thereby preventing the wires led out through the internal space of the multi-directional translational main shaft 22 from becoming entangled. The operating handle 2 drives the ball joint connecting structure 3 to perform translational motion by rotating with the second connecting part 221 as the fulcrum (which is also equivalent to rotating with the rotating hole 111 as the fulcrum). The operating handle 2 drives the ball joint connecting structure 3 to output rotational motion by rotating the first connecting part 211 relative to the second connecting part 221 (rotating around the second central axis). Translational and rotational movements are achieved by different operations of the operating handle 2. In application, the two movements can be performed individually or simultaneously.

[0044] As described above, the operating handle 2 and the base 1 form a three-degree-of-freedom ball-and-socket joint structure, that is, the second connecting part 221 and the rotating hole 111 of the wear-resistant support plate 11 form a ball-and-socket joint structure. The second connecting part 221 obtains three rotational degrees of freedom. Correspondingly, the first load 4, the second load, and the controlled device mounted on the second load can translate in any direction on the horizontal plane. The operating handle 2 and the ball-head connecting structure 3 form a spherical mechanism with two rotational degrees of freedom, that is, the first connecting part 211 and the ball-head connecting structure 3 are also spherically connected, but one of the rotational degrees of freedom is constrained, so that when the first connecting part 211 rotates relative to the second connecting part 221, the ball-head connecting structure 3 can rotate about the first central axis.

[0045] When the ball joint connecting structure 3 only performs translational motion, the operating handle 2 rotates around the second connecting part 221 as a fulcrum. At this time, the first connecting part 211 and the ball joint connecting structure 3 are in a relative motion state, allowing the ball joint connecting structure 3 to translate in any direction of the first plane. When the ball joint connecting structure 3 only performs rotational motion, the first connecting part 211 rotates relative to the second connecting part 221 around the second central axis. The ball joint connecting structure 3 rotates together with the first connecting part 211, but the axis of rotation of the ball joint connecting structure 3 is the first central axis. When the ball joint connecting structure 3 performs both translational and rotational motions, while the operating handle 2 rotates around the second connecting part 221 as a fulcrum, the rotation of the first connecting part 211 relative to the first connecting part 211 around the second central axis is further controlled.

[0046] In this embodiment, the operating handle 2 includes a multi-directional translational spindle 22 and a multi-directional rotational spindle 21. The multi-directional translational spindle 22 passes through and is rotatably connected to the multi-directional rotational spindle 21. The multi-directional translational spindle 22 and the multi-directional rotational spindle 21 are coaxially arranged, with the axis being the aforementioned second central axis. Figure 5 As shown, the multi-directional rotary spindle 21 is shorter than the multi-directional translational spindle 22. Bearings can be installed at both ends of the multi-directional rotary spindle 21 to connect to the multi-directional translational spindle 22, thereby improving the stability of both. Figure 5 As shown, the second connecting part 221 is located at the end of the multi-directional translational main shaft 22 and has a spherical structure, which allows it to rotate at a larger angle relative to the base 1. The first connecting part 211 is located at the end of the multi-directional rotational main shaft 21 and is located at the end close to the second connecting part 221. The first connecting part 211 adopts a ball-head structure.

[0047] See Figure 4-5 The surface of the first connecting part 211 is partially recessed to form a positioning guide groove 212. The length direction of the positioning guide groove 212 is parallel to the direction of the axis of the multi-directional rotating main shaft 21, that is, parallel to the direction of the second central axis. The positioning guide groove 212 and the positioning guide 32 of the ball head connecting structure 3 guide each other.

[0048] Specifically, along the length of the positioning guide groove 212, the guide end of the positioning guide member 32 can slide or roll relative to the positioning guide groove 212. Along the width of the positioning guide groove 212, the two sides of the positioning guide groove 212 are in contact with or have a small gap with the positioning guide member 32. During the rotation of the operating handle 2 around the second connecting part 221, the first connecting part 211 rotates relative to the ball joint connection structure 3. At this time, the guide ends of the positioning guide groove 212 and the positioning guide member 32 slide or roll relative to each other, thereby driving the ball joint connection structure 3 to translate on the first plane, causing the first load 4 and the second load mounted on the first load 4 to move horizontally relative to the base 1, and thus driving the controlled device to move horizontally. When the multi-directional rotary spindle 21 rotates relative to the multi-directional translational spindle 22, the positioning guide groove 212 drives the entire ball joint connection structure 3 to rotate by driving the positioning guide member 32. Figure 1-5 In the embodiment shown, the positioning guide 32 is disposed on the connecting body 31 of the ball joint connecting structure 3, and the positioning guide groove 212 is disposed on the ball joint structure of the first connecting part 211. In other embodiments, as an alternative, a structure with a function similar to the positioning guide groove 212 may be disposed on the ball joint connecting structure 3, and a structure with a function similar to the positioning guide 32 may be disposed on the first connecting part 211.

[0049] The operating handle 2 may also include other components. Considering that other components are not closely related to the design concept of this application, they will not be described in detail here.

[0050] In the embodiments of this application, such as Figures 3 to 5 As shown, the ball joint connection structure 3 includes the aforementioned connecting body 31 and the aforementioned positioning guide 32. The connecting body 31 and the first connecting part 211 with a ball joint structure of the operating handle 2 are connected to form a ball-and-socket joint structure with three rotational degrees of freedom. At the same time, the positioning guide 32 constrains the rotational degrees of freedom between the connecting body 31 and the first connecting part 211 relative to the first central axis. Therefore, the operating handle 2 ultimately has two rotational degrees of freedom relative to the ball joint connection structure 3.

[0051] In this embodiment, the connecting body 31 has a first limiting surface 311 and a second limiting surface 312 distributed along a first central axis. The first limiting surface 311 and the second limiting surface 312 are respectively located on both sides of the great circle (the circle obtained by intersecting the sphere with a plane passing through the center of the sphere) corresponding to the ball-head structure of the first connecting part 211, so as to facilitate the installation and constraint of the first connecting part 211. Figure 3-4As shown, the first limiting surface 311 and the second limiting surface 312 can be spaced apart, with space reserved between them for installing the positioning guide 32. In other embodiments, the first limiting surface 311 and the second limiting surface 312 can also be tightly connected, with the positioning guide 32 disposed between the component containing the first limiting surface 311 and the component containing the second limiting surface 312. In this embodiment, the first limiting surface 311 and the second limiting surface 312 respectively abut against the surfaces of the two ends of the spherical surface of the first connecting part 211, and the connecting body 31 and the first connecting part 211 form a movable connection relationship, so that the first connecting part 211 can rotate relative to the component containing the first limiting surface 311 and the component containing the second limiting surface 312, thereby forming a three-degree-of-freedom ball-and-socket joint structure between the connecting body 31 and the ball head structure of the first connecting part 211.

[0052] In this embodiment, the connecting body 31 includes an outer fixing member 313 and an inner fixing component 314 disposed within the outer fixing member 313. The outer fixing member 313 and the inner fixing component 314 are detachably connected. The positioning guide member 32 constrains the degree of freedom of relative rotation between the outer fixing member 313 and the first connecting part 211 about the first central axis. The first limiting surface 311 is disposed on the outer fixing member 313 or the inner fixing component 314, and the second limiting surface 312 is located on the inner fixing component 314. The positioning guide member 32 is disposed on the outer fixing member 313 or the inner fixing component 314. The first load 4 and the transmission mechanism 5 are respectively connected to the outer surface of the fixed outer ring.

[0053] like Figure 3-5 As shown, the connecting body 31 includes an external fixing member 313, an internal fixing component 314, and a limiting member 315. The limiting member 315 and the external fixing member 313 are detachably connected, and the limiting member 315 limits the internal fixing component 314, so that the second limiting surface 312 on the internal fixing component 314 abuts against the ball head structure of the first connecting part 211.

[0054] The internal fixation component 314 includes an internal fixation member 3141 and an elastic member 3142, which are disposed in the mounting cavity 3131 of the external fixation member 313. A limiting member 315 is connected to one end of the external fixation member 313 via fasteners. A first limiting surface 311 is disposed on the external fixation member 313, and a second limiting surface 312 is disposed on the internal fixation member 3141. The first and second limiting surfaces 311 and 312 abut against the ball-head structure under the action of the compressed elastic member 3142. The positions of the external fixation member 313 and the limiting member 315 are relatively fixed. The elastic force of the elastic member 3142 allows the first and second limiting surfaces 311 and 312 to be movably connected to the ball-head structure. The mechanical parameters of the elastic member 3142 can be calculated according to design requirements, thus ensuring that the tightness of the ball-head connection structure 3 and the operating handle 2 after connection is determined and unaffected by manual installation.

[0055] The external fixing member 313 includes a fixing outer ring with a mounting cavity 3131. One end of the fixing outer ring has a first limiting surface 311, and the other end is connected to the limiting member 315 by bolts. The positioning guide member 32 is positioned on the fixing outer ring. Here, "positioned on" can be interpreted as a fixed connection relationship or a rotational connection relationship. For example, the positioning guide member 32 is fixed on the fixing outer ring. Or, for example... Figure 4 As shown, the positioning guide 32 is rotatably connected to the fixed outer ring. The two ends of the positioning guide 32 are respectively limited by the transmission mechanism 5 and the first connecting part 211, so that the positioning guide 32 will not be displaced relative to the fixed outer ring.

[0056] The inner wall of the mounting cavity 3131 includes an inner cylindrical section 3132 and an inner conical section 3133. The diameter of the inner cylindrical section 3132 is larger than the diameter of the inner conical section 3133. The inner fixing member 3141 and the elastic member 3142 are disposed in the space corresponding to the inner cylindrical section 3132. The first limiting surface 311 is located on the inner conical section 3133. The fixing outer ring has a boss 3134, which separates the outer surface of the fixing outer ring into a first outer cylindrical section 3135 and a second outer cylindrical section 3136. The first outer cylindrical section 3135 serves as a bearing mounting surface and connects to the first load 4. The second outer cylindrical section 3136 serves as a drive wheel 51 mounting surface and connects to the transmission mechanism 5. In addition, when the first outer cylindrical section 3135 is connected to the first load 4 through the bearing, the edges of the boss 3134 and the limiting member 315 are respectively used as retaining rings for the inner ring of the bearing to prevent the bearing from moving axially.

[0057] The limiting member 315 includes an annular limiting cover 3151, which is detachably connected to the end face of the outer fixing member 313 by fasteners, making installation convenient. The inner ring of the limiting cover 3151 protrudes towards the inner wall of the fixing outer ring to limit the elastic member 3142. At the same time, the inner ring of the limiting cover 3151 can also limit the lower end of the inner fixing member 3141 to prevent the inner fixing member 3141 from falling off, thereby improving the reliability of the equipment.

[0058] The inner fixing component 3141 includes a fixed inner ring, which comprises an inner ring body 31411 and a retaining ring 31412. The top outer surface of the inner ring body 31411 protrudes outward to form the retaining ring 31412. An elastic element 3142 is disposed between the inner ring body 31411 and the wall of the mounting cavity 3131, preventing the elastic element 3142 from disengaging from the mounting cavity 3131 and improving the stability of the elastic element 3142. The elastic element 3142 abuts against the retaining ring 31412, which is fitted against the inner wall of the fixed outer ring to prevent radial movement of the fixed inner ring and the elastic element 3142, further improving the stability of the equipment. The inner surface of the inner ring body 31411 is provided with a second limiting surface 312, which is a conical surface.

[0059] The elastic element 3142 is a helical spring, sleeved on the inner fixing element 3141. In other embodiments, as an alternative, the elastic element 3142 may be a plurality of spring pieces evenly distributed between the inner fixing ring and the outer fixing ring.

[0060] In this embodiment, the positioning guide 32 is columnar, such as a positioning pin. One end of the positioning guide 32 is fixedly or rotatably connected to the external fixing member 313, and the other end of the positioning guide 32 is guided to the positioning guide groove 212 on the ball head structure. Figure 4 As shown, in this embodiment, the end of the positioning guide 32 away from the ball head structure abuts against the drive wheel 51 of the transmission mechanism 5, which facilitates installation and can use the drive wheel 51 to prevent the positioning guide 32 from moving outward or even falling off.

[0061] In this embodiment, the first load 4 includes a multi-directional moving platform 41 and a washer 42. The multi-directional moving platform 41 is rotatably connected to the ball joint connection structure 3 and can be a plate-like structure to facilitate the installation of the second load. The multi-directional moving platform 41 is fixed to the outer ring by a bearing, so that when the outer ring rotates about the first central axis, the multi-directional moving platform 41 can remain stationary. The washer 42 is fixed to the multi-directional moving platform 41 by fasteners. The washer 42 is disposed between the multi-directional moving platform 41 and the wear-resistant support plate 11. When the multi-directional moving platform 41 translates, the washer 42 slides relative to the friction protrusion 113 to improve the stability of the multi-directional moving platform 41. A hole is provided in the middle of the washer 42, and a gap is provided between the inner wall of the washer 42 and the ring 114 at the rotating hole 111 to prevent the washer 42 from interfering with the ring 114 when the multi-directional moving platform 41 translates.

[0062] like Figures 3 to 5 As shown, the first load 4 also includes a fixed bracket 43. The fixed bracket 43 includes an annular plate 431 and several legs 432 disposed on the edge of the annular plate 431. The legs 432 are detachably connected to the multi-directional moving platform 41 by fasteners. The annular plate 431 has a central hole in the middle, and there is a gap between the inner wall of the central hole and the support protrusion 112. The central hole allows the support protrusion 112 to pass through and leaves space for translational movement relative to the support protrusion 112 to prevent interference.

[0063] In some embodiments, the transmission mechanism 5 may include a drive wheel 51, a driven wheel, a transmission component, and an output shaft. The drive wheel 51 is fixed on a fixed outer ring and rotates together with the fixed outer ring. The transmission component is a transmission belt or a transmission chain. The drive wheel 51 drives the driven wheel to rotate through the transmission component, which in turn drives the output shaft fixedly connected to the driven wheel. The output shaft is threadedly connected to a second load. In other embodiments, the transmission mechanism 5 may be implemented using a mechanism not used for belt drives or chain drives, as long as it can convert the rotational motion of the fixed outer ring into the linear motion of the second load.

[0064] In this embodiment, the second load can be connected to the multi-directional moving platform 41 via the transmission mechanism 5, for example, by fixing it to the multi-directional moving platform 41 via the aforementioned output shaft. A plate structure or a frame structure can be used.

[0065] The above-disclosed embodiments are only some specific embodiments of this application, but this application is not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A handle control device, characterized in that, The device includes a base, an operating handle, and a ball joint connection structure. The operating handle includes a first connecting part and a second connecting part having a ball joint structure. The ball joint connection structure includes a connecting body and a positioning guide. The connecting body includes an external fixator, an internal fixator, an elastic member, and a limiting member. The limiting member is fixed to the external fixator. The internal fixator and the elastic member are disposed in the mounting cavity of the external fixator. The external fixator has a first limiting surface, and the internal fixator has a second limiting surface. The first limiting surface and the second limiting surface abut against the ball head structure under the action of the compressed elastic member. The first limiting surface and the second limiting surface are distributed at intervals along the first central axis of the connecting body and are located on both sides of the large circle corresponding to the spherical surface of the ball head structure. The positioning guide is used to constrain the degree of freedom of relative rotation between the external fixing member and the ball head structure about the first central axis, and is cylindrical; The external fastener is a single piece and includes the mounting cavity defined inside and a fixing outer ring with a boss on the outer surface. One end of the fixing outer ring has the first limiting surface, and the other end is detachably connected to the limiting member. The positioning guide is positioned on the fixing outer ring. The inner wall of the mounting cavity includes an inner cylindrical surface section and an inner conical surface section. The diameter of the inner cylindrical surface section is larger than the diameter of the inner conical surface section. The inner fixing member and the elastic member are disposed in the space corresponding to the inner cylindrical surface section. The first limiting surface is located on the inner conical surface section. The boss isolates the outer surface of the fixed outer ring into a first outer cylindrical surface section and a second outer cylindrical surface section. The first outer cylindrical surface section serves as a bearing mounting surface, and the second outer cylindrical surface section serves as a drive wheel mounting surface and connects to the drive wheel of the transmission mechanism. The first limiting surface and the second outer cylindrical surface section are opposite to each other. The outer fixing member has a positioning hole corresponding to the second outer cylindrical surface section for accommodating the positioning guide. When the drive wheel is positioned in the second outer cylindrical surface section, the drive wheel abuts against one end of the positioning guide. The boss serves as a retaining ring for the inner ring of the bearing to prevent axial movement of the bearing. The inner fixing member includes a fixing inner ring, which includes an inner ring body and a retaining ring. The top outer surface of the inner ring body protrudes outward to form the retaining ring. The elastic member is disposed between the inner ring body and the wall of the mounting cavity and abuts against the retaining ring. The inner surface of the inner ring body is provided with a second limiting surface, which is a conical surface. The elastic element is sleeved on the inner fixing element, and the elastic element is a helical spring. The ball head structure is provided with a positioning guide groove, the length direction of which is the direction of the first central axis, and when the positioning guide is seated in the positioning hole, the other end of the positioning guide is guided to the positioning guide groove. The limiting component includes an annular limiting cap, which is detachably connected to the end face of the outer fixing component by fasteners; the inner ring of the limiting cap protrudes towards the inner wall of the fixed outer ring to limit the elastic component, and at the same time, the inner ring of the limiting cap can also limit the lower end of the inner fixing component to prevent the inner fixing component from falling off. The base includes a wear-resistant support plate with a rotating hole in its central area. The rotating hole and the second connecting part form a ball-and-socket joint structure. The wear-resistant support plate is provided with a support protrusion facing the rotating hole. The side of the wear-resistant support plate away from the support protrusion has several friction protrusions. The friction protrusions are fitted to the first load and can slide relative to it, providing support for the first load. The wear-resistant support plate also has an upwardly protruding ring to increase the length of the rotating hole and prevent the operating handle from falling off. The friction protrusions are evenly arranged around the ring.

2. The handle control device as described in claim 1, characterized in that, The operating handle includes a multi-directional translational spindle and a multi-directional rotational spindle. The multi-directional translational spindle passes through and is rotatably connected to the multi-directional rotational spindle. The multi-directional rotational spindle has a first connecting part, and the multi-directional translational spindle has a second connecting part. The operating handle drives the ball joint connection structure to perform translational motion in a first plane by rotating around the second connecting part as a fulcrum. The operating handle drives the ball joint connection structure to output rotational motion about the first central axis by rotating the multi-directional rotational spindle relative to the multi-directional translational spindle.

3. The handle control device as described in claim 2, characterized in that, The handle control device further includes a first load, a transmission mechanism, and a second load disposed on the first load. The first load is movably connected to the external fixing member through a bearing, and the axis of the bearing is the first central axis. The transmission mechanism is used to convert the rotational motion of the ball joint connection structure into the linear motion of the second load.

4. An ophthalmic medical device, characterized in that, Includes the handle control device as described in any one of claims 1-3.

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