Ophthalmologic equipment

Abstract

The invention discloses ophthalmologic equipment which comprises a movable chassis, a host and a host driving mechanism, wherein the host integrates a vision examination function and a refraction detection function; the main machine comprises a main machine shell, a main machine upper cover and an upper cover driving mechanism. The ophthalmology equipment has a vision examination function and a refraction detection function and is provided with the movable base, the whole set of equipment can be transferred to a designated place according to needs, use is convenient, particularly, the equipment can be conveniently and sequentially moved to each class in a school for vision examination, queuing and crowding are avoided, and the examination and detection efficiency is also improved. The host can be adjusted in a lifting manner relative to the movable chassis, the host upper cover can be adjusted in a lifting manner relative to the host shell, and the window is arranged on one side of the host upper cover, so that secondary lifting adjustment can be realized to meet the inspection and detection requirements of users with different heights, and an external lifting driving mechanism is not needed to drive the whole set of ophthalmology equipment to move up and down; therefore, the ophthalmic equipment is released, so that the ophthalmic equipment can be transferred among different places for examination and detection.

Description

Technical Field

[0001] The present invention relates to the technical field of vision testing, and in particular to an ophthalmic device integrating a vision testing function and a refractive detection function. Background Art

[0002] The Chinese invention patent with publication number CN114343561A discloses a vision screening device, which integrates a diopter measuring device, a built-in display, a main control unit and a visual reflector, and integrates an external display on the outside. The user can operate the control unit to control the vision screening device. A window is provided on the device housing of the vision screening device at the position corresponding to the visual reflector. The optical paths of the built-in display and the diopter measuring device pass through the visual reflector and the window. The built-in display can display an electronic vision chart, and the external display can display the measurement results. The user stands in front of the window and visually observes the visual reflector. The diopter measuring device can complete the diopter measurement of the user's eyes. The electronic vision chart displayed on the built-in display can be reflected by the visual reflector. The user can complete the naked eye vision measurement by observing the electronic vision chart.

[0003] The device housing comprises a lower housing and an upper housing. A viewing window is provided on the upper housing, and a visible reflector is installed in the upper housing. A diopter measuring device, a built-in display and a main control unit are respectively installed in the lower housing.

[0004] A height adjustment mechanism for adjusting the installation height of the device housing is connected to the device housing. When in use, the device housing is adjustably mounted on a bracket, a wall or a fixing member at the use location. If the height of the user's eyes is higher or lower than the current height of the window, the height adjustment mechanism can be selectively operated to adjust the installation height of the device housing so that the user's eyes are substantially flush with the middle of the window.

[0005] The defects of the above existing solutions are that they can only be installed on a bracket, wall or fixed seat at the place of use, and the height adjustment mechanism is connected to the bracket, wall or fixed piece, and then the height of the device housing is adjusted by the height adjustment mechanism to match the height of the person being measured. If the person being measured is taller, for example, taller than 1.8m, the entire set of vision screening equipment needs to be raised to a higher position, which requires a larger and more reliable bracket, wall or fixed seat, which is inconvenient to change the location once fixed.

[0006] The decline of vision health of primary and secondary school students has become a real problem. Many schools are equipped with vision screening equipment or ophthalmic equipment for vision examination and diopter examination. If the vision screening equipment or ophthalmic equipment described in the prior art is used, it can only be fixed in the school clinic and requires a large space. Students can only queue up in the school clinic for examination, which is crowded and inefficient. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an ophthalmic device, which is equipped with a movable base, which can drive the entire set of equipment to be transferred to a designated place as needed, which is convenient for use, especially convenient for moving to each class in the school in turn for vision examination, avoiding queuing and crowding, and improving the efficiency of inspection and detection. The host is integrated with a vision examination function and a refractive detection function, which can be raised and lowered relative to the movable chassis, and the host cover can be raised and lowered relative to the host shell. The window is set on one side of the host cover, so that two-level lifting adjustment can be achieved to meet the inspection and detection needs of users of different heights. Therefore, there is no need for an external lifting drive mechanism to drive the entire set of ophthalmic equipment up and down, thereby releasing the ophthalmic equipment so that it can be transferred between different places for inspection and detection.

[0008] The technical solution of the present invention provides an ophthalmic device, comprising a movable chassis, a host slidably connected to the movable chassis and integrated with a vision test function and a refraction detection function, and a host driving mechanism for driving the host to lift and lower;

[0009] The host comprises a host housing equipped with a refractive detection module and a built-in display module, a host upper cover equipped with a window, an optical reflector and a visual reflector and slidably connected to the host housing, and an upper cover driving mechanism for driving the upper cover of the host to rise and fall;

[0010] The mainframe housing is slidably connected to the movable chassis and is connected to the mainframe driving mechanism;

[0011] The refractive detection module, the visible reflector and the window are located on the refractive detection optical path;

[0012] A beam splitter is provided at the lens end of the refractive detection module, and the built-in display module, the optical reflector, the beam splitter, the visual reflector and the window are located on the vision inspection optical path;

[0013] When the ophthalmic device is in a first working state, the host is in an initial position on the movable chassis;

[0014] When the ophthalmic device is in the second working state, the host driving mechanism drives the host to rise;

[0015] When the ophthalmic device is in the third working state, the upper cover driving mechanism drives the host upper cover to rise.

[0016] In one of the optional technical solutions, the refractive detection module is pivotally mounted in the mainframe housing, and the visible reflector is fixedly mounted in the mainframe upper cover;

[0017] The host housing is provided with a first linkage mechanism cooperating with the refractive detection module. When the host upper cover is raised or lowered, the first linkage mechanism drives the refractive detection module to swing accordingly, so that the refractive detection module and the visible reflector remain in the refractive detection optical path.

[0018] In one of the optional technical solutions, the built-in display module can be pivotally installed in the host housing and cooperate with the first linkage mechanism;

[0019] The optical reflector is pivotally mounted in the upper cover of the host, and a second linkage mechanism cooperating with the optical reflector is provided in the upper cover of the host;

[0020] When the upper cover of the host is raised or lowered, the first linkage mechanism drives the built-in display module to swing accordingly, and the second linkage mechanism drives the optical reflector to swing accordingly, so that the built-in display module, the optical reflector, the beam splitter and the visible reflector remain in the vision inspection light path.

[0021] In one of the optional technical solutions, the pivot end of the refractive detection module is provided with an arc-shaped first tooth portion, and the pivot end of the built-in display module is provided with an arc-shaped second tooth portion;

[0022] The first linkage mechanism includes a first flexible rack, a first reel for reeling up the first flexible rack, a first gear set assembled between the first flexible rack and the first toothed portion, a second gear set assembled between the first flexible rack and the second toothed portion, and a first guide wheel for guiding the first flexible rack to turn;

[0023] The first gear set and the second gear set are sequentially arranged between the first reel and the first guide wheel at intervals;

[0024] One end of the first flexible rack is connected to the first reel, and the other end of the first flexible rack is turned through the first guide wheel and connected to the mainframe upper cover.

[0025] In one of the optional technical solutions, the first linkage mechanism includes a first pressing wheel and a second pressing wheel;

[0026] The first pressing wheel is configured correspondingly to the first input end gear of the first gear set, and is used to press the first flexible rack and the first input end gear tightly;

[0027] The second pressure wheel is configured corresponding to the second input end gear of the second gear set, and is used to press the first flexible rack and the second input end gear tightly.

[0028] In one of the optional technical solutions, a housing installation cavity is provided at the bottom of the main housing, and the first reel, the first gear set, the second gear set and the first guide wheel are assembled in the housing installation cavity;

[0029] The side wall of the host housing is provided with a first channel for arranging the first flexible rack, and the lower end opening of the first channel is communicated with the housing installation cavity;

[0030] One end of the first flexible rack passes through the first channel and is connected to the host upper cover.

[0031] In one of the optional technical solutions, the pivot end of the optical reflector is provided with an arc-shaped third tooth portion;

[0032] The second linkage mechanism includes a second flexible rack, a second reel for reeling up the second flexible rack, a third gear set mounted between the second flexible rack and the third toothed portion, and a second guide wheel for guiding the second flexible rack to turn;

[0033] The third gear set is arranged between the second reel and the second guide wheel;

[0034] One end of the second flexible rack is connected to the second reel, and the other end of the second flexible rack is turned through the second guide wheel and connected to the main housing.

[0035] In one of the optional technical solutions, the second linkage mechanism includes a third pressure wheel, and the third pressure wheel is configured corresponding to the third input end gear of the third gear set, and is used to press the second flexible rack against the third input end gear.

[0036] In one of the optional technical solutions, the upper cover top plate of the host upper cover is provided with an upper cover mounting groove and an upper cover mounting cavity;

[0037] The second reel and the third gear set are mounted in the upper cover mounting groove, and the second guide wheel is mounted in the upper cover mounting cavity;

[0038] A second passage connecting the upper cover mounting groove and the upper cover mounting cavity is provided in the upper cover top plate, and the second passage is used for the second flexible rack to pass through;

[0039] A third channel extending vertically is provided in the upper cover side plate of the host upper cover, the upper end opening of the third channel is communicated with the upper cover mounting cavity, one end of the second flexible rack passes through the third channel and is connected to the host shell.

[0040] In one of the optional technical solutions, the host cover is sleeved on the outer periphery of the host shell;

[0041] A stretchable elastic shield is connected between the lower end of the mainframe upper cover and the upper end of the movable chassis.

[0042] The above technical solution has the following beneficial effects:

[0043] The ophthalmic device provided by the present invention comprises a movable chassis, a host and a host driving mechanism. The movable chassis can be moved and locked, and the host is integrated with a vision test function and a refractive detection function, which can be driven by the host driving mechanism to be raised and lowered relative to the movable chassis to achieve a first level of lifting and lowering adjustment.

[0044] The host computer with integrated vision test function and refractive detection function includes a host housing, a host upper cover and an upper cover driving mechanism, and the host housing is connected to the host driving mechanism. The window is arranged on the side of the host upper cover, the host upper cover is slidably connected to the host housing, and is driven by the upper cover driving mechanism to achieve the second level of lifting adjustment.

[0045] When conducting a vision test screening, if the height of the user being tested is below the first height, the host computer integrated with the vision test function and the refractive detection function is in the initial position on the movable chassis and does not need to be raised; if the height of the user being tested is between the first height and the second height, the host computer driving mechanism drives the host computer integrated with the vision test function and the refractive detection function to be raised; if the height of the user being tested is above the second height, the upper cover driving mechanism drives the upper cover of the host computer to be raised.

[0046] In summary, the ophthalmic equipment provided by the present invention has a vision test function and a refractive detection function, and is equipped with a movable base, which can drive the entire set of equipment to be transferred to a designated place as needed, which is convenient for use, and is especially convenient for moving to each class in the school in turn for vision tests and inspections, avoiding crowded queues, and improving the efficiency of inspections and inspections. The host integrated with the vision test function and the refractive detection function can be raised and lowered relative to the movable chassis, and the host cover can be raised and lowered relative to the host shell. The window is provided on one side of the host cover, so that two-level lifting adjustment can be achieved to meet the inspection and inspection needs of users of different heights. Therefore, there is no need for an external lifting drive mechanism to drive the entire set of ophthalmic equipment to move up and down, thereby releasing the ophthalmic equipment so that it can be transferred between different places for inspection and inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0048] Figure 1 A cross-sectional view of an ophthalmic device provided by an embodiment of the present invention, wherein the host is in an initial state;

[0049] Figure 2 A cross-sectional view of an ophthalmic device provided by an embodiment of the present invention, wherein the main unit is in a raised state;

[0050] Figure 3 A cross-sectional view of an ophthalmic device provided by an embodiment of the present invention, wherein the main unit cover of the main unit is in a raised state;

[0051] Figure 4 is a cross-sectional view of the movable chassis;

[0052] Figure 5 is a cross-sectional view of the host housing;

[0053] Figure 6 It is an assembly diagram of the refractive detection module, the built-in display module and the first linkage mechanism;

[0054] Figure 7 is a schematic diagram of the refractive detection module being driven to swing by the first gear set when the first flexible rack is pulled;

[0055] Figure 8 It is a schematic diagram of the built-in display module being driven to swing by the second gear set when the first flexible rack is pulled;

[0056] Fig. 9 It is a cross-sectional view of the upper cover of the host;

[0057] Fig.10 is a schematic diagram of the assembly of the optical reflector and the second linkage mechanism;

[0058] Fig.11 It is a schematic diagram of driving the optical reflector to swing through the third gear set when the second flexible rack is pulled;

[0059] Fig.12 A schematic diagram of simultaneously pulling the first flexible rack and the second flexible rack when the upper cover of the host is raised;

[0060] Fig.13 is a cross-sectional view of the elastic shield;

[0061] Fig.14 It is a schematic diagram of the refractive detection optical path and the vision inspection optical path when the upper cover of the main unit is in the initial state;

[0062] Fig.15 It is a schematic diagram of the refractive detection optical path and the vision inspection optical path when the upper cover of the host is in the raised state, wherein the refractive detection module, the built-in display module and the optical reflector are swung at a certain angle respectively. DETAILED DESCRIPTION

[0063] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. The same components are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0064] like Figure 1-6 and Fig. 9 As shown, an ophthalmic device provided by an embodiment of the present invention includes a movable chassis 1, a host 2 which is slidably connected to the movable chassis 1 and integrated with a vision examination function and a refractive detection function, and a host driving mechanism 3 for driving the host 2 to rise and fall.

[0065] The host 2 includes a host housing 21 equipped with a refractive detection module 24 and a built-in display module 25, a host upper cover 22 equipped with a window 223, an optical reflector 26 and a visible reflector 27 and slidably connected to the host housing 21, and an upper cover driving mechanism 23 for driving the host upper cover 22 to rise and fall.

[0066] The host housing 21 is slidably connected to the movable chassis 1 and is connected to the host driving mechanism 3 .

[0067] The refractive detection module 24, the visible reflector 27 and the window 223 are located on the refractive detection optical path.

[0068] A beam splitter 242 is provided at the lens end of the refractive detection module 24, and the built-in display module 25, the optical reflector 26, the beam splitter, the visible reflector 27 and the window 223 are located in the vision inspection optical path.

[0069] When the ophthalmic device is in the first working state, the host 2 is in an initial position on the movable chassis 1 .

[0070] When the ophthalmic device is in the second working state, the host driving mechanism 3 drives the host 2 to rise.

[0071] When the ophthalmic device is in the third working state, the upper cover driving mechanism 23 drives the main body upper cover 22 to rise.

[0072] The ophthalmic device provided by the present invention comprises a movable chassis 1, a host 2 and a host driving mechanism 3, wherein the host 2 is integrated with a vision testing function and a refractive detection function.

[0073] The movable chassis 1 can be moved and locked. Optionally, as Figure 4 As shown, the movable chassis 1 includes a chassis base 11 and a circle of chassis side walls 12 arranged around the chassis base 11, thereby forming a mounting cavity 13 for assembling the main body housing 21 and the main body driving mechanism 3.

[0074] The bottom of the chassis base 11 is provided with a plurality of universal wheels 14 and a lifting leveling foot 15. The leveling foot 15 is provided with a screw rod 151, and the chassis base 11 is provided with an internal threaded hole 111, and the screw rod 151 is connected to the internal threaded hole 111. The leveling foot 15 can be raised or lowered by rotating the screw rod 151. Preferably, the leveling foot 15 and the screw rod 151 are pivotally connected. When the screw rod 151 is rotated, the leveling foot 15 does not rotate, but only moves up and down with the screw rod 151.

[0075] When the leveling foot 15 is raised, the universal wheel 14 is grounded, and the ophthalmic device can be pushed. After moving to the specified position, the leveling foot 15 is lowered to prop up the ophthalmic device, and the universal wheel 14 is off the ground, the ophthalmic device is positioned at the specified position, and the ophthalmic device is leveled.

[0076] The host 2 can be driven by the host driving mechanism 3 to be raised and lowered relative to the movable chassis 1 to achieve a first level of raising and lowering adjustment.

[0077] The host 2 includes a host housing 21, a host upper cover 22 and an upper cover driving mechanism 23. The lower end of the host housing 21 is slidably assembled in the mounting cavity 13. The host housing 21 is connected to the host driving mechanism 3, and the host driving mechanism 3 drives the host housing 21 to rise and fall, thereby driving the host 2 to rise and fall.

[0078] A refraction detection module 24 and a built-in display module 25 are provided at the bottom of the main body housing 21 .

[0079] Specifically, the host housing 21 includes a housing bottom plate 211 and a circle of housing side walls 212 arranged on the housing bottom plate 211, thereby enclosing a cavity for installing the refractive detection module 24, the built-in display module 25, the control circuit board (control module), etc.

[0080] The refraction detection module 24 may use an existing refraction detection device, for example, an imaging device using polarized light photography optometry, which is used to measure the refraction of the user's eye 100 to obtain refraction parameters. The refraction parameters include spherical power sph, cylindrical power cyl, and axis axis.

[0081] The built-in display module 25 has an electronic eye chart display module, which can display the electronic eye chart or the letters in the eye chart, the letters are generally the letter E, and the size of the letters can be adjusted.

[0082] The host upper cover 22 is slidably connected to the host housing 21 and can slide up and down relative to the host housing 21. The optical reflector 26 and the visual reflector 27 are disposed in the host upper cover 22.

[0083] Specifically, the host upper cover 22 includes an upper cover top plate 221 and an upper cover side plate 222 arranged around the upper cover top plate 221 , which enclose a cavity for mounting the optical reflector 26 and the visual reflector 27 .

[0084] The viewing window 223 is disposed on the upper cover side plate 222 at one side of the host upper cover 22 . The visible reflector 27 is disposed corresponding to the viewing window 223 , and the optical reflector 26 is located between the visible reflector 27 and the viewing window 223 .

[0085] If the side with the viewing window 223 is defined as the front side, the visible reflector 27 extends forward and downward in an inclined manner. The optical reflector 26 is located at the top of the main body cover 22 and at the front corner.

[0086] The built-in display module 25 is located at the bottom of the main body housing 21 and at the rear bottom corner, and the refraction detection module 24 is located at the bottom of the main body housing 21 and at the front bottom corner.

[0087] The lens end 241 of the refractive detection module 24 is provided with a beam splitter 242 , which is used to allow infrared light emitted from the lens end 241 to pass toward the visible reflector 27 , and to reflect visible light emitted from the optical reflector 26 toward the visible reflector 27 .

[0088] The infrared light emitted from the lens end 241 of the refractive detection module 24 is emitted along the optical path a to the visual reflector 27, and then emitted from the visual reflector 27 along the optical path b from the window 223. Therefore, when the user's glasses are aligned with the window 223, their eyeballs can be photographed by the refractive detection module 24, and then the refractive power parameters are calculated by the control circuit board (control module). The optical path between the refractive detection module 24, the visual reflector 27 and the window 223 can be called the refractive detection optical path, which realizes the refractive detection function.

[0089] The light emitted by the built-in display module 25 reaches the optical reflector 26 via the optical path c, is then reflected by the optical reflector 26 along the optical path d to the beam splitter 242, and is then emitted from the window 223 along the optical path b by the optical reflector 26. Therefore, when the user's glasses are aligned with the window 223, he or she can see the electronic eye chart displayed by the built-in display module 25 or the letters in the eye chart. The optical path between the built-in display module 25, the optical reflector 26, the beam splitter 242, the visual reflector 27 and the window 223 can be called a vision test optical path to achieve a vision test function.

[0090] Each electric component in the present invention is connected to the control circuit board (control module) by signal, and the control circuit board (control module) controls the switches and actions of each driving mechanism, linkage mechanism, refractive detection module 24, and built-in display module 25, and is also used to collect signals, data, information, etc. of the refractive detection module 24, built-in display module 25 and monitoring unit to calculate the desired data parameters. The ophthalmic device provided by the present invention can be controlled by remote control, voice control, touch button, etc.

[0091] The host upper cover 22 is slidably connected to the host housing 21, and is driven by the upper cover driving mechanism 23 to be raised and lowered to achieve the second level of lifting and lowering adjustment. Specifically, the upper cover side plate 222 is slidably connected to the housing side wall 212. The upper cover side plate 222 can be located on the outer side of the housing side wall 212, or can be configured on the inner side of the housing side wall 212. The upper cover driving mechanism 23 is fixedly arranged on the housing side wall 212, and its output end is connected to the upper cover side plate 222 and / or the upper cover top plate 221, and is used to drive the host upper cover 22 to slide up and down.

[0092] The upper cover driving mechanism 23 can adopt a linear driving mechanism such as an oil cylinder, an air cylinder, a motor screw, etc.

[0093] The main engine driving mechanism 3 can be a linear driving mechanism such as an oil cylinder, an air cylinder, a motor screw, etc. The main engine driving mechanism 3 is fixedly arranged on the movable chassis 1 , and its output end is connected to the main engine housing 21 .

[0094] In normal or initial state, such as Figure 1 As shown, the host 2 is in the initial position, its host housing 21 is in the lowest position, and the host driving mechanism 3 does not drive the host 2 to rise. This state can also be called the first working state. At this time, it can be used for users within a certain height range, for example, users between 1m and 1.4m. Children with a height of less than 1m can use a bench or a seat to assist.

[0095] like Figure 2 As shown, when the user's height is within another certain height range, for example, the user group between 1.4-1.8m, the host 2 is driven to rise by the host drive mechanism 3 to meet the needs of the user group within this height range. This state can be called the second working state.

[0096] In the above two cases, the optical path lengths of the refractive detection optical path and the visual acuity test optical path remain unchanged.

[0097] When the user is higher than the other fixed height range, if the host 2 is further raised, the center of the whole machine will be too high and the center of gravity will be unstable. For this reason, the following method is adopted:

[0098] like Figure 3 As shown, when the height of the user is within a certain height range, for example, the user group between 1.8-2.2m, the host cover 22 is driven to rise by the cover driving mechanism 23 to meet the needs of the user group within this height range. This state can be called the third working state. At this time, only raising the host cover 22 will not cause the center of gravity of the whole machine to shift upward, and the center of gravity remains stable, and there is no need to add an additional fixing mechanism, thereby maintaining the flexibility of the whole machine.

[0099] In the above case, the optical paths of the refractive detection optical path and the visual acuity test optical path are increased, and the refractive detection module 24 has an automatic focusing function and automatically adjusts the focus according to the increase in the refractive detection optical path.

[0100] For the vision test optical path, if it does not exceed the standard distance value, for example, 2.5m, the size of the letter E displayed by the built-in display module 25 is a normal operation and does not need to be changed. If the optical path of the vision test optical path exceeds the standard distance value, the built-in display module 25 automatically enlarges the displayed letter E according to the optical path of the vision test optical path. This adjustment method is the content of the prior art and will not be repeated here.

[0101] In short, when performing vision screening, if the height of the user under test is below the first height, the host 2 integrated with the vision test function and the refractive detection function is in the initial position on the movable chassis 1 and does not need to be raised. If the height of the user under test is between the first height and the second height, the host driving mechanism 3 drives the host 2 integrated with the vision test function and the refractive detection function to rise. If the height of the user under test is above the second height, the upper cover driving mechanism 23 drives the host upper cover 22 to rise.

[0102] In summary, the ophthalmic equipment provided by the present invention has a vision test function and a refractive detection function, and is equipped with a movable base, which can drive the entire set of equipment to be transferred to a designated place as needed, which is convenient for use, and is especially convenient for moving to each class in the school in turn for vision tests, avoiding queues and crowds, and also improving the efficiency of inspection and detection. The host 2 integrated with the vision test function and the refractive detection function can be raised and lowered relative to the movable chassis 1, and the host cover 22 can be raised and lowered relative to the host shell 21. The window 223 is arranged on one side of the host cover 22, so that two-level lifting adjustment can be achieved to meet the inspection and detection needs of users of different heights. Therefore, there is no need for an external lifting drive mechanism to drive the entire set of ophthalmic equipment to move up and down, thereby releasing the ophthalmic equipment so that it can be transferred between different places for inspection and detection.

[0103] In one embodiment, if Figure 1-5 As shown, the upper end of the chassis side wall 12 is provided with a first limit ring 121 extending inward, and the shell bottom plate 211 is provided with a circle of first stop ring 2111 on the outer periphery of the shell side wall 212. When the host 2 rises to the limit position, the first stop ring 2111 is blocked by the first limit ring 121.

[0104] In one embodiment, if Figure 1-5 , Fig. 9 and Fig.12As shown, a second limiting ring 214 is provided on the outer periphery of the upper end of the shell side wall 212, a second retaining ring 225 is provided on the inner circle of the lower end of the upper cover side plate 222, and a third limiting ring 224 is provided on the inner surface of the upper cover side plate 222, and the third limiting ring 224 is located above the second retaining ring 225.

[0105] When the host upper cover 22 is in the initial state, the third limiting ring 224 falls on the second limiting ring 214 . When the host upper cover 22 rises to the limit position, the second blocking ring 225 is blocked by the second limiting ring 214 .

[0106] In one embodiment, if Figure 1-5 As shown, the host driving mechanism 3 adopts a motor screw mechanism, which includes a first motor 31 and a first screw 32 connected to the first motor 31. The housing bottom plate 211 is provided with an internal threaded hole 2112, specifically, the internal threaded hole 2112 is provided on the first retaining ring 2111. The first motor 31 is fixed to the chassis base 11, and the first screw 32 passes through the internal threaded hole 2112, and the two are threadedly connected. The forward and reverse rotation of the first motor 31 can drive the host housing 21 to rise and fall through the first screw 32, thereby driving the host 2 to rise and fall. Preferably, a linear guide structure is arranged between the host housing 21 and the chassis side wall 12 to improve the lifting stability of the host housing 21 and prevent the host housing 21 from rotating.

[0107] Preferably, the first screw rod 32 is pivotally connected to the first limiting ring 121 to improve the installation stability of the first screw rod 32 .

[0108] Preferably, two sets of host driving mechanisms 3 are arranged between the movable chassis 1 and the host housing 21 , and the two sets of host driving mechanisms 3 are located on opposite sides of the center line of the host housing 21 , so as to improve the stability of driving the host 2 to rise and fall.

[0109] In one embodiment, if Figure 1-3 , Figure 5 , Fig. 9 and Fig.12 As shown, the upper cover driving mechanism 23 adopts a motor screw mechanism, which includes a second motor 231 and a second screw 232 connected to the second motor 231 .

[0110] A mounting ring 213 is provided on the outer periphery of the shell side wall 212, and the second motor 231 is provided on the mounting ring 213. An internal threaded hole 226 is provided at the lower end of the upper cover side plate 222, and preferably, the internal threaded hole 226 is provided on the second retaining ring 225. The second screw rod 232 passes through the internal threaded hole 226, and the two are threadedly connected. The forward and reverse rotation of the second motor 32 can drive the main body upper cover 22 to rise and fall through the second screw rod 232. Preferably, a linear guide structure is arranged between the shell side wall 212 and the upper cover side plate 222 to improve the lifting stability of the main body upper cover 22 and prevent the main body upper cover 22 from rotating.

[0111] Preferably, an upper cover driving mechanism 23 is disposed between the host upper cover 22 and the host housing 21 , and two sets of upper cover driving mechanisms 23 are located on opposite sides of the center line of the host upper cover 22 , so as to improve the stability of driving the host upper cover 22 to rise and fall.

[0112] In one embodiment, if Figure 1-3 , Figure 6 and Figure 14-15 As shown, the refractive detection module 24 is pivotally mounted in the host housing 21 , and the visible reflector 27 is fixedly disposed in the host upper cover 22 .

[0113] A first linkage mechanism 28 cooperating with the refractive detection module 24 is provided in the main body shell 21. When the main body upper cover 22 is raised and lowered, the first linkage mechanism 28 drives the refractive detection module 24 to swing accordingly, so that the refractive detection module 24 and the visible reflector 27 remain in the refractive detection optical path.

[0114] In this embodiment, the visible reflector 27 is fixedly disposed in the main body upper cover 22, and the refractive detection module 24 is pivotally mounted in the main body housing 21 via a hinge or a rotating shaft, and can swing.

[0115] If the refractive detection module 24 is fixed in the host housing 21, when the host cover 22 rises a certain distance, the light emitted from the lens end 241 of the refractive detection module 24 may not illuminate the visible reflector 27, thereby causing the refractive detection module 24 to deviate from the refractive detection optical path.

[0116] Therefore, in this embodiment, during the rising process of the main body cover 22, the refractive detection module 24 adaptively swings a certain angle, so that the lens end 241 is always facing the visible reflector 27, so that the refractive detection module 24 remains in the refractive detection optical path.

[0117] Specifically, the pivot end 242 of the refractive detection module 24 is mounted on the bottom of the main housing 21 via a rotating shaft 244 .

[0118] A first linkage mechanism 28 is provided in the main body housing 21, and the first linkage mechanism 28 cooperates with the refractive detection module 24, and the first linkage mechanism 28 is linked with the main body upper cover 22. When the main body upper cover 22 is raised and lowered, the first linkage mechanism 28 drives the refractive detection module 24 to swing accordingly, so that the refractive detection module 24 and the visible reflector 27 are kept in the refractive detection optical path.

[0119] The first linkage mechanism 28 can be an actively driven motor mechanism, or a passively driven rack, cable, or other mechanism. The first linkage mechanism 28 cooperates with the pivot end 242 of the refractive detection module 24. When the host cover 22 is raised or lowered, the first linkage mechanism 28 starts to act on the pivot end 242, so that the refractive detection module 24 swings toward the front side at a certain angle α. When the host cover 22 is reset, the first linkage mechanism 28 drives the refractive detection module 24 to swing in the opposite direction and reset to the initial state or initial angle.

[0120] The angle α can be calculated based on Figure 14-15 The calculations shown in the figure show that:

[0121] Fig.14 In the figure, the main cover 22 is in the initial position, the initial height from the midpoint of the visible reflector 27 to the rotation axis 244 is H1, the horizontal distance is D, the angle between the light emitted from the lens end 241 and the vertical line downward from the midpoint of the visible reflector 27 is θ1, and the refractive detection module 24 is at the initial angle.

[0122] Fig.15 In the figure, the main cover 22 rises a certain distance, the initial height between the midpoint of the visible reflector 27 and the rotating shaft 244 is H2, the horizontal distance is D, the angle between the light emitted from the lens end 241 and the vertical line downward from the midpoint of the visible reflector 27 is θ2, and the refractive detection module 24 swings toward the front side by α.

[0123] Then, α=θ2-θ1=tgD / H1-tgD / H2.

[0124] In one embodiment, if Figure 1-3 , Figure 6 , Figure 10-11 and Figure 14-15 As shown, the built-in display module 25 is pivotally mounted in the host housing 21 and cooperates with the first linkage mechanism 28 .

[0125] The optical reflector 26 is pivotally mounted in the mainframe upper cover 22 , and a second linkage mechanism 29 cooperating with the optical reflector 26 is disposed in the mainframe upper cover 22 .

[0126] When the main cover 22 is raised or lowered, the first linkage mechanism 28 drives the built-in display module 25 to swing accordingly, and the second linkage mechanism 29 drives the optical reflector 26 to swing accordingly, so that the built-in display module 25, the optical reflector 26, the beam splitter 242 and the visible reflector 27 remain in the vision inspection light path.

[0127] In this embodiment, in order to prevent the light reflected by the optical reflector 26 from being unable to irradiate the beam splitter 242 due to the lifting of the mainframe cover 22 and the swing of the refractive detection module 24, the optical reflector 26 is installed in a pivotable manner.

[0128] If the optical reflector 26 is fixed in the mainframe cover 22, when the mainframe cover 22 rises a certain distance, the light reflected by the optical reflector 26 may not be irradiated onto the beam splitter 242, so that the optical reflector 26 deviates from the vision inspection light path.

[0129] Therefore, in this embodiment, during the rising process of the host cover 22, the optical reflector 26 adaptively swings to a certain angle, so that the optical reflector 26 is always facing the beam splitter 242, so that the optical reflector 26 and the beam splitter 242 remain in the vision inspection light path.

[0130] Specifically, the pivot end 261 of the optical reflector 26 is connected to the main body cover 22 via a hinge or a shaft 262, and can swing.

[0131] A second linkage mechanism 29 is provided in the mainframe upper cover 22, and the second linkage mechanism 29 cooperates with the optical reflector 26, and the second linkage mechanism 29 maintains linkage with the mainframe upper cover 22. When the mainframe upper cover 22 is raised and lowered, the second linkage mechanism 29 drives the optical reflector 26 to swing accordingly, so that the optical reflector 26 and the beam splitter 242 remain in the vision inspection optical path.

[0132] The second linkage mechanism 29 can be an actively driven motor mechanism, or a passively driven rack, cable, or other mechanism. The second linkage mechanism 29 cooperates with the pivot end 261 of the optical reflector 26. When the host cover 22 is raised or lowered, the second linkage mechanism 29 starts to act on the pivot end 261, so that the optical reflector 26 swings toward the front side at a certain angle β. When the host cover 22 is reset, the second linkage mechanism 29 drives the optical reflector 26 to swing in the opposite direction and reset to the initial state or initial angle.

[0133] Similarly, in order to prevent the light emitted by the built-in display module 25 from being unable to illuminate the optical reflector 26 due to the lifting of the host cover 22 and the swing of the optical reflector 26, the built-in display module 25 is installed in a pivotable manner.

[0134] The built-in display module 25 is pivotally mounted in the main body housing 21 via a hinge or a rotating shaft, and can swing. The built-in display module 25 cooperates with the first linkage mechanism 28, and the first linkage mechanism 28 drives the built-in display module 25 to swing. When the main body upper cover 22 is raised and lowered, the first linkage mechanism 28 simultaneously drives the built-in display module 25 to swing accordingly, so that the light emitted by the built-in display module 25 can remain directed toward the optical reflector 26.

[0135] Specifically, the pivot end 251 of the built-in display module 25 is installed at the bottom of the host housing 21 through a rotating shaft 252 .

[0136] The first linkage mechanism 28 cooperates with the pivot end 251 of the built-in display module 25. When the upper cover 22 of the host is raised and lowered, the first linkage mechanism 28 starts to act on the pivot end 251, so that the built-in display module 25 swings toward the front side by a certain angle γ. When the upper cover 22 of the host is reset, the first linkage mechanism 28 drives the built-in display module 25 to swing in the opposite direction and reset to the initial state or initial angle.

[0137] β and γ can be calculated using trigonometric functions based on α, the optical path, and the positions between components. Generally, the angle θ will not change too much, so α=β=γ can be selected to meet the need to maintain the optical path and facilitate control.

[0138] In one embodiment, if Figure 6-8 As shown, the pivot end 243 of the refractive detection module 24 is provided with an arc-shaped first tooth portion 245 , and the pivot end 251 of the built-in display module 25 is provided with an arc-shaped second tooth portion 253 .

[0139] The first linkage mechanism 28 includes a first flexible rack 281, a first winding wheel 282 for winding up the first flexible rack 281, a first gear set 283 assembled between the first flexible rack 281 and the first tooth portion 245, a second gear set 284 assembled between the first flexible rack 281 and the second tooth portion 253, and a first guide wheel 285 for guiding the first flexible rack 281 to turn.

[0140] The first gear set 283 and the second gear set 284 are sequentially arranged between the first reel 282 and the first guide wheel 285 at intervals.

[0141] One end of the first flexible rack 281 is connected to the first reel 282 , and the other end of the first flexible rack 281 is turned through the first guide wheel 285 and connected to the mainframe upper cover 22 .

[0142] In this embodiment, a first tooth portion 245 is provided on the outer surface of the pivot end 243 of the refractive detection module 24. The first tooth portion 245 is arc-shaped with a center angle between 90° and 180°. Of course, gears can also be arranged on the rotating shaft 244 to achieve this.

[0143] The outer surface of the pivot end 251 of the built-in display module 25 is provided with a second tooth portion 253, which is arc-shaped with a center angle between 90° and 180°. Of course, gears can also be arranged on the rotating shaft 252 to achieve this.

[0144] The first linkage mechanism 28 is a combination of a first flexible rack 281 , a first winding wheel 282 , a first gear set 283 , a second gear set 284 and a first guide wheel 285 .

[0145] One side of the first flexible rack 281 has teeth and can be wound. The first flexible rack 281 can be a cable with teeth.

[0146] The first reel 282 is disposed at the front side of the pivot end 243 and is used to reel in the first flexible rack 281. A torsion spring is disposed on the rotating shaft of the first reel 282. When the external force pulling the first flexible rack 281 disappears, the first reel 282 will automatically reel in the first flexible rack 281.

[0147] The first gear set 283 is assembled between the first flexible rack 281 and the first toothed portion 245, and plays a role in transmission. The first gear set 283 includes a first input end gear 2831 and a first output end gear 2832, which are meshed for transmission. The radius of the first input end gear 2831 is smaller than that of the first output end gear 2832, and plays a role in deceleration. The first input end gear 2831 meshes with the first flexible rack 281, and the first output end gear 2832 meshes with the first toothed portion 245. Figure 7 As described above, when the first flexible rack 281 is pulled to the right, the first input end gear 2831 rotates counterclockwise, and the first output end gear 2832 rotates clockwise, and finally drives the pivot end 243 to swing counterclockwise. When the first reel 282 reels the first flexible rack 281, the pivot end 243 swings clockwise to reset. By setting a suitable gear ratio, the refractive detection module 24 can swing to a suitable angle when the first flexible rack 281 is pulled to a preset length. This is the content of the prior art and will not be repeated here.

[0148] The second gear set 284 is located at the rear side of the first gear set 283. The second gear set 284 is assembled between the first flexible rack 281 and the second toothed portion 253 to play a transmission role. The second gear set 284 includes a second input end gear 2841 and a second output end gear 2842, which are meshed for transmission. The radius of the second input end gear 2841 is smaller than that of the second output end gear 2842, which plays a deceleration role. The second input end gear 2841 meshes with the first flexible rack 281, and the second output end gear 2842 meshes with the second toothed portion 245. Figure 8 As described above, when the first flexible rack 281 is pulled to the right, the second input end gear 2841 rotates counterclockwise, and the second output end gear 2842 rotates clockwise, and finally drives the pivot end 251 to swing counterclockwise. When the first reel 282 reels the first flexible rack 281, the pivot end 251 swings clockwise to reset. By setting a suitable gear ratio, when the first flexible rack 281 is pulled to a preset length, the built-in display module 25 swings to a suitable angle, which is the content of the prior art and will not be repeated here.

[0149] The first guide wheel 285 is disposed at the rear side of the second gear set 284 and is used to guide the passing first flexible rack 281 to turn upward.

[0150] During assembly, one end of the first flexible rack 281 is connected to the first roller 282, and the other end thereof is turned through the first guide wheel 285 and connected to the mainframe cover 22. Therefore, when the mainframe cover 22 rises, the first flexible rack 281 is pulled, so that the refractive detection module 24 and the built-in display module 25 swing forward respectively. When the mainframe cover 22 is lowered and reset, the first roller 282 retracts the first flexible rack 281, so that the refractive detection module 24 and the built-in display module 25 swing in the opposite direction and reset respectively.

[0151] In one embodiment, if Figure 6-8 As shown, the first linkage mechanism 28 includes a first pressure wheel 286 and a second pressure wheel 287 .

[0152] The first pressure wheel 286 is configured corresponding to the first input end gear 2831 of the first gear set 283 and is used to press the first flexible rack 281 and the first input end gear 2831 to prevent the first flexible rack 281 and the first input end gear 2831 from being separated.

[0153] The second pressure wheel 287 is configured corresponding to the second input end gear 2841 of the second gear set 284 to press the first flexible rack 281 and the second input end gear 2841 to prevent the first flexible rack 281 and the second input end gear 2841 from being separated.

[0154] In one embodiment, if Figure 5-8 and Fig.12 As shown, a housing installation cavity 215 is provided at the bottom of the main housing 21 , and the first reel 282 , the first gear set 283 , the second gear set 284 and the first guide wheel 285 are assembled in the housing installation cavity 215 .

[0155] The housing side wall 212 of the host housing 21 is provided with a first channel 2121 for arranging the first flexible rack 281 , and the lower end opening of the first channel 2121 is communicated with the housing installation cavity 215 .

[0156] One end of the first flexible rack 281 passes through the first channel 2121 and is connected to the host upper cover 22 .

[0157] In this embodiment, a housing installation cavity 215 is provided at the bottom of the main housing 21, and the first reel 282, the first gear set 283, the second gear set 284 and the first guide wheel 285 are assembled in the housing installation cavity 215, which acts as a gear box.

[0158] A mounting cavity cover 216 is provided at the top of the housing mounting cavity 215 to prevent dust and provide protection. The mounting cavity cover 216 is provided with a front opening 2161 and a rear opening 2162. The pivot end 243 and the pivot end 251 extend into the housing mounting cavity 215 through the front opening 2161 and the rear opening 2162, respectively.

[0159] A first channel 2121 is provided on the shell side wall 212 at the rear side of the host shell 21 for arranging the first flexible rack 281. The lower end opening of the first channel 2121 is communicated with the shell installation cavity 215, and the upper end opening of the first channel 2121 is located on the top surface of the shell side wall 212. One end of the first flexible rack 281 passes through the first channel 2121 and is connected to the host upper cover 22. The first channel 2121 serves to limit and guide the first flexible rack 281, and can also prevent the first flexible rack 281 from interfering with components on the inner side of the shell side wall 212.

[0160] In one embodiment, if Figure 10-11 As shown, the pivot end 261 of the optical reflector 26 is provided with an arc-shaped third tooth portion 263 .

[0161] The second linkage mechanism 29 includes a second flexible rack 291, a second reel 292 for reeling in the second flexible rack 291, a third gear set 293 mounted between the second flexible rack 291 and the third tooth portion 263, and a second guide wheel 294 for guiding the second flexible rack 291 to turn.

[0162] The third gear set 293 is disposed between the second reel 292 and the second guide wheel 294 .

[0163] One end of the second flexible rack 291 is connected to the second reel 292 , and the other end of the second flexible rack 291 is turned through the second guide wheel 294 and connected to the main housing 21 .

[0164] In this embodiment, a third tooth portion 263 is provided on the outer surface of the pivot end 261 of the optical reflector 26. The third tooth portion 263 is arc-shaped with a center angle between 90° and 180°. Of course, gears can also be arranged on the rotating shaft 262 to achieve this.

[0165] The second linkage mechanism 29 adopts a combination of a second flexible rack 291 , a second reel 292 , a third gear set 293 and a second guide wheel 294 .

[0166] One side of the second flexible rack 291 has teeth and can be wound. The second flexible rack 291 can be a cable with teeth.

[0167] The second reel 292 is disposed at the front side of the pivot end 261 for reeling in the second flexible rack 291. A torsion spring is disposed on the rotating shaft of the second reel 292. When the external force pulling the second flexible rack 291 disappears, the second reel 292 will automatically reel in the second flexible rack 291.

[0168] The third gear set 293 is assembled between the second flexible rack 291 and the third toothed portion 263, and plays a transmission role. The third gear set 293 includes a third input end gear 2931 and a third output end gear 2932, which are meshed for transmission. The radius of the third input end gear 2931 is smaller than that of the third output end gear 2932, and plays a deceleration role. The third input end gear 2931 meshes with the second flexible rack 291, and the third output end gear 2932 meshes with the third toothed portion 263. Fig.11 As described above, when the second flexible rack 291 is pulled to the right, the third input end gear 2931 rotates clockwise, and the third output end gear 2932 rotates counterclockwise, and finally drives the pivot end 263 to swing clockwise. When the second reel 292 reels the second flexible rack 291, the pivot end 263 swings counterclockwise to reset. By setting a suitable gear ratio, the optical reflector 26 can be swung to a suitable angle when the second flexible rack 291 is pulled to a preset length. This is the content of the prior art and will not be repeated here.

[0169] The second guide wheel 294 is disposed at the rear side of the third gear set 293 and is used to guide the passing second flexible rack 291 to turn downward.

[0170] During assembly, one end of the second flexible rack 291 is connected to the second reel 292, and the other end thereof is turned through the second guide wheel 294 and connected to the main body housing 21. Therefore, when the main body upper cover 22 rises, the second flexible rack 291 is pulled by the main body housing 21 and extends downward, so that the optical reflector 26 swings forward. When the main body upper cover 22 is lowered and reset, the second reel 292 retracts the second flexible rack 291, so that the optical reflector 26 swings in the opposite direction and resets.

[0171] In one embodiment, if Figure 10-11 As shown, the second linkage mechanism 29 includes a third pressure wheel 295, which is configured corresponding to the third input end gear 2931 of the third gear set 293, and is used to press the second flexible rack 291 and the third input end gear 2931 to prevent the second flexible rack 291 from disengaging from the third input end gear 2931.

[0172] In one embodiment, if Figure 9-12 As shown, the upper cover top plate 221 of the host upper cover 22 is provided with an upper cover mounting groove 2211 and an upper cover mounting cavity 2212 .

[0173] The second reel 292 and the third gear set 293 are assembled in the upper cover mounting groove 2211 , and the second guide wheel 294 is assembled in the upper cover mounting cavity 2212 .

[0174] A second passage 2213 communicating with the upper cover mounting groove 2211 and the upper cover mounting cavity 2212 is provided in the upper cover top plate 221 , and the second passage 2213 is used for the second flexible rack 291 to pass through.

[0175] A third channel 2221 extending vertically is provided in the upper cover side plate 222 of the host upper cover 22 . The upper end opening of the third channel 2221 is communicated with the upper cover mounting cavity 2212 . One end of the second flexible rack 291 passes through the third channel 2221 and is connected to the host housing 21 .

[0176] In this embodiment, the front side of the upper cover top plate 221 is provided with an upper cover mounting groove 2211, and the rear side thereof is provided with an upper cover mounting cavity 2212. The second reel 292 and the third gear set 293 are assembled in the upper cover mounting groove 2211, and the pivot end 263 is in the upper cover mounting groove 2211. If necessary, a cover plate can be provided at the bottom of the upper cover mounting groove 2211 to play a protective role.

[0177] The second guide wheel 294 is assembled in the upper cover installation cavity 2212 , and a window may be provided at the rear side of the upper cover installation cavity 2212 to facilitate installation of the second guide wheel 294 .

[0178] A second channel 2213 extending horizontally is provided in the upper cover top plate 221, which connects the upper cover mounting groove 2211 and the upper cover mounting cavity 2212, and the second flexible rack 291 passes through the second channel 2213. The second channel 2213 limits and guides the second flexible rack 291 in the horizontal section, and can also prevent the second flexible rack 291 from interfering with the components below the upper cover top plate 221.

[0179] A third channel 2221 is provided in the upper cover side plate 222 on the rear side of the host upper cover 22, and extends vertically. The upper end opening of the third channel 2221 is communicated with the upper cover mounting cavity 2212, and the lower end opening of the third channel 2221 is located at the bottom surface of the upper cover side plate 222. One end of the second flexible rack 291 passes through the third channel 2221 and is connected to the host housing 21. The third channel 2221 limits and guides the second flexible rack 291 in the vertical section, and can also prevent the second flexible rack 291 from interfering with the components on the inner side of the upper cover side plate 222.

[0180] In one embodiment, if Figure 1-3 and Fig.13 As shown, the mainframe upper cover 22 is sleeved on the outer periphery of the mainframe housing 21. A stretchable elastic shield 4 is connected between the lower end of the mainframe upper cover 22 and the upper end of the movable chassis 1.

[0181] In this embodiment, the upper cover side plate 222 of the host upper cover 22 is slidably disposed on the outer side of the housing side wall 212 of the host housing 21 .

[0182] An elastic shield 4 is connected between the lower end of the host upper cover 22 and the upper end of the chassis side wall 12 of the movable chassis 1. The elastic shield 4 can be stretched to prevent dust. The elastic shield 4 can be made of a rubber shield or a silicone shield with good elasticity. The elastic shield 4 can be provided with a corrugated structure as required to enhance its stretching ability. When the host 2 and the host upper cover 22 rise, the elastic shield 4 will stretch adaptively. After the host 2 and the host upper cover 22 are reset, the elastic shield 4 will automatically shrink.

[0183] In one embodiment, the second motor 231 is located between the elastic shield 4 and the housing side wall 212, and the elastic shield 4 plays a protective role. A plurality of breathing holes 41 are provided on the elastic shield 4 to play a ventilation and heat dissipation role.

[0184] The motor in the present invention can be a servo motor or a stepper motor.

[0185] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0186] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of the present invention, which should also be considered as the protection scope of the present invention.

Claims

1. An ophthalmic device, characterized in that: It comprises a movable chassis, a host slidably connected to the movable chassis and integrated with a vision inspection function and a refraction detection function, and a host driving mechanism for driving the host to lift and lower; The host comprises a host housing equipped with a refractive detection module and a built-in display module, a host upper cover equipped with a window, an optical reflector and a visual reflector and slidably connected to the host housing, and an upper cover driving mechanism for driving the upper cover of the host to rise and fall; The mainframe housing is slidably connected to the movable chassis and is connected to the mainframe driving mechanism; The refractive detection module, the visible reflector and the window are located on the refractive detection optical path; A beam splitter is provided at the lens end of the refractive detection module, and the built-in display module, the optical reflector, the beam splitter, the visual reflector and the window are located on the vision inspection optical path; When the ophthalmic device is in a first working state, the host is in an initial position on the movable chassis; When the ophthalmic device is in the second working state, the host driving mechanism drives the host to rise; When the ophthalmic device is in the third working state, the upper cover driving mechanism drives the host upper cover to rise.

2. The ophthalmic device according to claim 1, characterized in that The refraction detection module is pivotally mounted in the mainframe housing, and the visible reflector is fixedly mounted in the mainframe upper cover; The host housing is provided with a first linkage mechanism cooperating with the refractive detection module. When the host upper cover is raised or lowered, the first linkage mechanism drives the refractive detection module to swing accordingly, so that the refractive detection module and the visible reflector remain in the refractive detection optical path.

3. The ophthalmic device according to claim 2, characterized in that The built-in display module is pivotally mounted in the host housing and cooperates with the first linkage mechanism; The optical reflector is pivotally mounted in the upper cover of the host, and a second linkage mechanism cooperating with the optical reflector is provided in the upper cover of the host; When the upper cover of the host is raised or lowered, the first linkage mechanism drives the built-in display module to swing accordingly, and the second linkage mechanism drives the optical reflector to swing accordingly, so that the built-in display module, the optical reflector, the beam splitter and the visible reflector remain in the vision inspection light path.

4. The ophthalmic device according to claim 3, characterized in that The pivot end of the refractive detection module is provided with an arc-shaped first tooth portion, and the pivot end of the built-in display module is provided with an arc-shaped second tooth portion; The first linkage mechanism includes a first flexible rack, a first reel for reeling up the first flexible rack, a first gear set assembled between the first flexible rack and the first toothed portion, a second gear set assembled between the first flexible rack and the second toothed portion, and a first guide wheel for guiding the first flexible rack to turn; The first gear set and the second gear set are sequentially arranged between the first reel and the first guide wheel at intervals; One end of the first flexible rack is connected to the first reel, and the other end of the first flexible rack is turned through the first guide wheel and connected to the mainframe upper cover.

5. The ophthalmic device according to claim 4, characterized in that The first linkage mechanism includes a first pressing wheel and a second pressing wheel; The first pressing wheel is configured correspondingly to the first input end gear of the first gear set, and is used to press the first flexible rack and the first input end gear tightly; The second pressure wheel is configured corresponding to the second input end gear of the second gear set, and is used to press the first flexible rack and the second input end gear tightly.

6. The ophthalmic device according to claim 4, characterized in that A housing installation cavity is provided at the bottom of the main housing, and the first reel, the first gear set, the second gear set and the first guide wheel are assembled in the housing installation cavity; The housing side wall of the host housing is provided with a first channel for arranging the first flexible rack, and the lower end opening of the first channel is communicated with the housing installation cavity; One end of the first flexible rack passes through the first channel and is connected to the host upper cover.

7. The ophthalmic device according to claim 3, characterized in that The pivot end of the optical reflector is provided with an arc-shaped third tooth portion; The second linkage mechanism includes a second flexible rack, a second reel for reeling up the second flexible rack, a third gear set mounted between the second flexible rack and the third toothed portion, and a second guide wheel for guiding the second flexible rack to turn; The third gear set is arranged between the second reel and the second guide wheel; One end of the second flexible rack is connected to the second reel, and the other end of the second flexible rack is turned through the second guide wheel and connected to the main housing.

8. The ophthalmic device according to claim 7, characterized in that The second linkage mechanism includes a third pressure wheel, which is configured corresponding to the third input-end gear of the third gear set and is used to press the second flexible rack against the third input-end gear.

9. The ophthalmic device according to claim 7, characterized in that The upper cover top plate of the host upper cover is provided with an upper cover mounting groove and an upper cover mounting cavity; The second reel and the third gear set are mounted in the upper cover mounting groove, and the second guide wheel is mounted in the upper cover mounting cavity; A second passage connecting the upper cover mounting groove and the upper cover mounting cavity is provided in the upper cover top plate, and the second passage is used for the second flexible rack to pass through; A third channel extending vertically is provided in the upper cover side plate of the host upper cover, the upper end opening of the third channel is communicated with the upper cover mounting cavity, one end of the second flexible rack passes through the third channel and is connected to the host shell.

10. The ophthalmic device according to claim 1, characterized in that The host upper cover is sleeved on the outer periphery of the host shell; A stretchable elastic shield is connected between the lower end of the mainframe upper cover and the upper end of the movable chassis.

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