A magnetically controlled zoom liquid lens

Abstract

The application relates to the field of optical lenses, in particular to a magnetic control zoom liquid lens which comprises a shell, a zoom assembly and an adjusting assembly are arranged in the shell; the zoom assembly comprises a zoom barrel, a first zoom lens is arranged at one end of the zoom barrel, a second zoom lens is arranged at the other end of the zoom barrel, a transparent elastic film is arranged in the zoom barrel, the transparent elastic film divides the zoom barrel into a first cavity and a second cavity, two different liquids are filled in the first cavity and the second cavity respectively; the adjusting assembly comprises a mounting ring, a first driving piece, a rotating block, a second driving piece and a magnet, the mounting ring is slidingly arranged in the shell, the first driving piece is used for driving the mounting ring to move towards the direction of approaching or moving away from the transparent elastic film; the rotating block is rotationally connected with the mounting ring, the magnet is fixed on the rotating block, and the second driving piece is used for driving the rotating block to rotate. The application is convenient for adjusting the focal length of the lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical lens, in particular to a magnetic control zoom liquid lens. BACKGROUND

[0002] In recent years, a liquid lens has appeared, the core of which is the liquid lens technology developed by Philips Company in the Netherlands. The technology uses two liquids with different refractive indexes and immiscible with each other, and can make a unique zoom lens with high optical quality and without moving parts. The two liquids (a conductive aqueous solution and a non-conductive oil) are filled into the lens, so that the aqueous solution forms a semispherical lens-shaped liquid at the other end of the test tube. The shape of the lens is adjusted by applying a DC voltage on the coating to reduce the water repulsive force. This process called "electrowetting" changes the radius of curvature of the concave-convex lens by adjusting the surface tension of the liquid, so as to change the focal length of the lens.

[0003] The related technology discloses a magnetic control zoom liquid lens, which comprises two lens pieces which are coaxially arranged and sealed at the periphery to form a cavity, a transparent elastic film containing magnetic material which divides the cavity into two cavities, two liquids with different refractive indexes which are filled in the two cavities respectively, and a lens barrel which is provided with a rotatable focusing barrel and at least one magnetic block which is arranged in the focusing barrel and changes the curvature of the transparent elastic film.

[0004] The related technology has the following defects: the related technology discloses that when the distance between the magnetic block and the transparent elastic film is long, the magnetic force acting on the film is weak; when the distance between the magnetic block and the transparent elastic film is unchanged, the magnetic force acting on the film is constant, and a stable curvature can be formed; when the magnetic block is close to the transparent elastic film, the magnetic force acting on the film is large, and the curvature of the film is large; since the refractive indexes of the liquids on both sides of the transparent elastic film are different, the related technology does not describe the specific adjustment mode of the magnetic block, so that the user cannot conveniently adjust the focal length of the lens. SUMMARY

[0005] In order to conveniently adjust the focal length of the lens, the present application provides a magnetic control zoom liquid lens.

[0006] The magnetic control zoom liquid lens provided by the present application adopts the following technical scheme:

[0007] A magnetic control zoom liquid lens comprises a shell, a zoom assembly and an adjusting assembly arranged in the shell; the zoom assembly comprises a zoom cylinder, a first zoom lens mounted on one end of the zoom cylinder, a second zoom lens mounted on the other end of the zoom cylinder, and a transparent elastic film mounted in the zoom cylinder, the transparent elastic film divides the zoom cylinder into a first cavity and a second cavity, and the first cavity and the second cavity are respectively filled with two different liquids;

[0008] The adjusting assembly comprises a mounting ring, a first driving member, a rotating block, a second driving member and a magnet, the mounting ring is slidingly arranged in the shell, the first driving member is used to drive the mounting ring to move towards the transparent elastic film or away from the transparent elastic film, the rotating block is rotationally connected with the mounting ring, the magnet is fixed on the rotating block, and the second driving member is used to drive the rotating block to rotate.

[0009] By adopting the above technical scheme, when the distance between the magnet and the transparent elastic film is long, the magnetic force acting on the transparent elastic film is weak; when the distance between the magnet and the transparent elastic film is constant, the magnetic force acting on the transparent elastic film is a constant value, so that a stable curvature can be formed; when the magnet is close to the transparent elastic film, the magnetic force acting on the magnet is large, and the curvature of the transparent elastic film is large; when the user needs to adjust the curvature of the lens, the first driving member is used to drive the mounting ring to move towards the transparent elastic film or away from the transparent elastic film, the mounting ring drives the magnet to move towards the transparent elastic film or away from the transparent elastic film; at the same time, the second driving member is used to drive the rotating block to rotate, and the rotating block drives the magnet to rotate, so that the angle of the magnet is adjusted, and the focal length of the liquid lens is adjusted.

[0010] Optionally, the first driving member comprises a mounting seat, a first small motor, a gear and a rack, the mounting seat is fixed on the mounting ring, the first small motor is fixed on the mounting seat, the gear is sleeved on the output shaft of the first small motor and is fixedly connected with the output shaft of the first small motor, the rack is fixed in the shell, and the gear and the rack are in meshing connection.

[0011] By adopting the above technical scheme, the first small motor drives the gear to rotate, the gear drives the rack and the first small motor to move along the length direction of the rack in the process of rotating, so as to drive the mounting ring and the magnet to move along the length direction of the rack, thereby facilitating the adjustment of the positions of the mounting ring and the magnet along the length direction of the rack, and further facilitating the adjustment of the distance between the magnet and the transparent elastic film.

[0012] Optionally, an arc-shaped groove is formed in the mounting seat, the mounting ring passes through the arc-shaped groove, the mounting seat and the mounting ring are in sliding cooperation, and a fixing assembly for fixing the mounting seat is arranged on the mounting seat.

[0013] By adopting the above technical solution, since the mounting base and the mounting ring slide together, the operator can release the fixing component from the mounting base, and then easily adjust the position of the mounting base and the gear along the circumference of the mounting ring, thereby ensuring that the gear and the rack mesh with each other.

[0014] Optionally, the fixing component includes a fixing block and a screw. The fixing block is fixed to the mounting base, the screw is threadedly engaged with the fixing block, and the end of the screw abuts against the mounting ring.

[0015] By adopting the above technical solution, when the end of the screw abuts against the fixed block, the friction between the end of the screw and the fixed block has a fixing effect on the fixed block, thereby fixing the fixed block to the mounting ring, and then fixing the mounting base and the motor to the mounting ring; when it is necessary to adjust the position of the gear along the circumference of the mounting ring, the operator can easily rotate the screw to move the screw away from the length direction of the mounting ring, thereby releasing the abutment of the end of the screw against the mounting ring, and thus making it easy for the operator to adjust the position of the mounting base and the motor along the circumference of the mounting ring, thereby facilitating the adjustment of the position of the gear along the circumference of the mounting ring.

[0016] Optionally, a knob is fixedly installed on the screw.

[0017] By adopting the above technical solution, workers can rotate the screw by turning the knob, which saves effort.

[0018] Optionally, the mounting base has a first mounting slot, and the first small motor is fixed in the first mounting slot.

[0019] By adopting the above technical solution, the first mounting slot has a positioning function for the first small motor, making it convenient for workers to install the first small motor on the mounting base.

[0020] Optionally, the inner sidewall of the housing is provided with a positioning groove, and the outer sidewall of the rack abuts against the inner sidewall of the positioning groove.

[0021] By adopting the above technical solution, the positioning groove has a positioning function for the rack, which not only increases the efficiency of installing the rack on the housing, but also increases the firmness of the rack installation on the housing.

[0022] Optionally, a positioning rod is fixedly installed in the positioning groove, and a positioning hole is opened on the rack, with the positioning rod and the positioning hole being inserted into each other.

[0023] By adopting the above technical solution, since the positioning rod and the positioning hole are inserted and matched, the positioning rod and the positioning groove have the same positioning function for the rack, thereby achieving precise positioning of the rack. When the first small motor drives the gear to rotate, the rack will not slide along the length direction of the positioning groove, which increases the firmness of the rack installed on the housing.

[0024] Optionally, the second driving component includes a support block, a rotating rod, and a second miniature motor. The support block is fixed to the mounting ring, the rotating rod is fixed to the rotating block, and the end of the rotating rod passes through the mounting ring and the support block in sequence. The rotating rod is rotatably connected to the mounting ring and the support block. The second miniature motor is fixed to the support block, and the output shaft of the second miniature motor is fixedly connected to the end of the rotating rod.

[0025] By adopting the above technical solution, the mounting ring supports the support block, the support block supports the second small motor, the second small motor drives the rotating rod to rotate, the rotating rod drives the rotating block to rotate, the rotating block drives the magnet to rotate, thereby facilitating the adjustment of the magnet's tilt angle, and thus facilitating the adjustment of the liquid lens's focal length.

[0026] Optionally, the rotating block has a second mounting groove, and the magnet is fixed in the second mounting groove.

[0027] By adopting the above technical solution, the second mounting slot has a positioning function for the magnet, which increases the efficiency of workers in installing the magnet on the rotating block.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. When the distance between the magnet and the transparent elastic film is relatively long, the magnetic force on the film is weak. When the distance between the magnet and the transparent elastic film remains constant, the magnetic force on the transparent elastic film is constant, forming a stable curvature. When the magnet approaches the transparent elastic film, the magnetic force increases, and the curvature of the transparent elastic film increases. When the user needs to adjust the curvature of the lens, the first driving component drives the mounting ring to move towards or away from the transparent elastic film, and the mounting ring drives the magnet to move towards or away from the transparent elastic film. At the same time, the second driving component drives the rotating block to rotate, and the rotating block drives the magnet to rotate, thereby facilitating the adjustment of the magnet's angle and thus adjusting the focal length of the liquid lens. It has the advantages of compact structure and flexible control.

[0030] 2. The first small motor drives the gear to rotate. During the rotation, the gear drives the gear and the first small motor to move along the length of the rack, thereby driving the mounting ring and the magnet to move along the length of the rack. This makes it easier to adjust the position of the mounting ring and the magnet along the length of the rack, and thus makes it easier to adjust the distance between the magnet and the transparent elastic film.

[0031] 3. Because the mounting base and the mounting ring slide together, the operator can release the fixing component from the mounting base, and then easily adjust the position of the mounting base and the gear along the circumference of the mounting ring, thereby ensuring that the gear and rack mesh with each other. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the magnetic zoom liquid lens in the embodiments of this application.

[0033] Figure 2 This is a half-sectional view of the housing in an embodiment of this application.

[0034] Figure 3 This is a half-sectional view of the zoom component in the embodiments of this application.

[0035] Figure 4 This is a schematic diagram of the structure of the adjustment component in the embodiments of this application.

[0036] Figure 5 yes Figure 4 A magnified view of part A in the diagram.

[0037] Figure 6 This is a schematic diagram of the positioning groove and positioning rod in the embodiments of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Housing; 11. Mounting cylinder; 111. First mounting hole; 112. Second mounting hole; 113. Positioning groove; 114. Positioning rod; 12. First iris; 13. Second iris; 2. Zoom assembly; 21. Zoom cylinder; 211. Third mounting hole; 212. Fourth mounting hole; 213. Mounting block; 214. Guide rod; 22. First zoom lens; 23. Second zoom lens; 24. Transparent elastic film; 25. First cavity; 26. Second cavity; 3. Adjustment group Components; 31. Mounting ring; 32. First driving component; 321. Mounting base; 322. First miniature motor; 323. Gear; 324. Rack; 325. Arc groove; 326. First mounting groove; 33. Rotating block; 331. Second mounting groove; 332. Measuring screw; 34. Second driving component; 341. Support block; 342. Rotating rod; 343. Second miniature motor; 35. Magnet; 36. Fixing assembly; 361. Fixing block; 362. Screw; 363. Knob. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0041] This application discloses a magnetically controlled zoom liquid lens. (Refer to...) Figure 1 and Figure 2 The magnetically controlled zoom liquid lens includes a housing 1, which includes a mounting cylinder 11. One end of the mounting cylinder 11 has a first mounting hole 111, and the other end has a second mounting hole 112. The diameter of the first mounting hole 111 is larger than the diameter of the second mounting hole 112. A first lens 12 is installed in the first mounting hole 111, and a second lens 13 is installed in the second mounting hole 112. The diameter of the first lens 12 is larger than the diameter of the second lens 13. The first lens 12 and the second lens 13 allow light to pass through, enabling light to penetrate from one end of the mounting cylinder 11 to the other end.

[0042] Reference Figure 2 and Figure 3 A zoom assembly 2 is disposed inside the mounting cylinder 11. The zoom assembly 2 includes a zoom tube 21, which is fixed inside the mounting cylinder 11, with its axis coinciding with the axis of the mounting cylinder 11. The zoom tube 21 is frustum-shaped, with openings at both ends. One end of the zoom tube 21 has a third mounting hole 211, and the other end has a fourth mounting hole 212. The diameter of the third mounting hole 211 is larger than the diameter of the fourth mounting hole 212. A first zoom lens 22 is fixedly disposed inside the third mounting hole 211, and a second zoom lens 23 is fixedly disposed inside the fourth mounting hole 212. Both the first zoom lens 22 and the second zoom lens 23 refract light. In this embodiment, the inner wall of the first iris 12 abuts against one end of the zoom tube 21, and the inner wall of the second iris 13 abuts against the other end of the zoom tube 21. The first and second perspective lenses 12 and 13 have a positioning function for the zoom tube 21, which increases the stability of the zoom tube 21 installation.

[0043] Reference Figure 3A transparent elastic film 24 is also fixedly disposed inside the zoom barrel 21. The transparent elastic film 24 is located between the first zoom lens 22 and the second zoom lens 23, dividing the zoom barrel 21 into a first cavity 25 and a second cavity 26. Specifically, the first zoom lens 22, the transparent elastic film 24, and the zoom barrel 21 combine to form the first cavity 25, and the second zoom lens 23, the transparent elastic film 24, and the zoom barrel 21 combine to form the second cavity 26. The first cavity 25 and the second cavity 26 are respectively filled with two liquids with different refractive indices. Because the two liquids have different refractive indices, light will be refracted after passing through the two liquids in sequence. The curvature change between the two liquids can adjust the refraction path, so that the focal length of the lens changes accordingly. In this embodiment, the two liquids can be, but are not limited to, water and colorless lubricating oil. The transparent elastic film 24 in this embodiment has good light transmittance, as well as sufficient elongation toughness and elasticity. Moreover, the transparent elastic film 24 will deform under the influence of the magnet 35. In addition, the transparent elastic film 24 in this embodiment is provided with a transparent magnetic material. The transparent magnetic material can be, but is not limited to, silica aerogel and ultrafine neodymium iron boron magnetic powder or magnetic materials composed of iron or nickel.

[0044] Reference Figure 4 and Figure 5 The adjustment assembly 3 includes a mounting ring 31, a first driving member 32, two rotating blocks 33, two second driving members 34, and two magnets 35. The mounting ring 31 is slidably disposed within the housing 1. The first driving member 32 drives the mounting ring 31 to move towards or away from the transparent elastic film 24, thereby facilitating the adjustment of the position of the magnets 35 in the direction of approaching or moving away from the transparent elastic film 24. The two rotating blocks 33 and the two magnets 35 are symmetrically distributed on opposite sides of the zoom barrel 21. Both rotating blocks 33 are rotatably connected to the mounting ring 31, and the two magnets 35 are respectively fixed to the ends of the two rotating blocks 33 away from the mounting ring 31. The two second driving members 34 are disposed on the mounting ring 31 and are respectively used to drive the two rotating blocks 33 to rotate. During the rotation of the two rotating blocks 33, the tilt angle of the two magnets 35 can be adjusted, thereby facilitating the change of the focal length of the liquid lens. It has the advantages of compact structure and flexible control.

[0045] Reference Figure 5The first driving component 32 includes a mounting base 321, a first miniature motor 322, a gear 323, and a rack 324. The mounting base 321 is fixed to the mounting ring 31, and a first mounting groove 326 is provided on the mounting base 321. The first miniature motor 322 is fixed in the first mounting groove 326. The gear 323 is sleeved on the output shaft of the first miniature motor 322 and is fixedly connected to the output shaft of the first miniature motor 322. The rack 324 is fixed in the housing 1, and the length direction of the rack 324 is the same as the length direction of the axis of the zoom cylinder 21. The gear 323 and the rack 324 mesh with each other. The first miniature motor 322 drives the gear 323 to rotate. During rotation, the gear 323 and the first miniature motor 322 move along the length of the rack 324, thereby causing the mounting ring 31 and the magnet 35 to move along the length of the rack 324. This facilitates adjustment of the positions of the mounting ring 31 and the magnet 35 along the length of the rack 324, and consequently, adjustment of the distance between the magnet 35 and the transparent elastic film 24. In this embodiment, the zoom barrel 21 and the mounting ring 31 are fitted with a clearance fit, ensuring that the mounting ring 31 does not contact the zoom barrel 21 during sliding, thus protecting both the zoom barrel 21 and the mounting ring 31.

[0046] Reference Figure 5 and Figure 6 The inner wall of the mounting cylinder 11 is provided with a positioning groove 113, and the outer wall of the rack 324 abuts against the inner wall of the positioning groove 113. The positioning groove 113 has a positioning function for the rack 324, which not only increases the efficiency of mounting the rack 324 on the housing 1, but also increases the firmness of the rack 324 mounted on the housing 1.

[0047] Reference Figure 6 Two positioning rods 114 are fixedly installed in the positioning groove 113, and two positioning holes are opened on the rack 324. The two positioning rods 114 are respectively inserted into the two positioning holes. Therefore, the two positioning rods 114 and the positioning groove 113 simultaneously have a positioning function for the rack 324, thereby achieving precise positioning of the rack 324. When the first small motor 322 drives the gear 323 to rotate, the rack 324 will not slide along the length direction of the positioning groove 113, which increases the firmness of the rack 324 installed on the housing 1.

[0048] Reference Figure 2 and Figure 4Two mounting blocks 213 are fixedly installed on the outer wall of the zoom cylinder 21. Guide rods 214 are fixedly installed on each mounting block 213, extending along the axis of the zoom cylinder 21. The ends of the guide rods 214 furthest from the mounting blocks 213 are fixedly connected to the mounting cylinder 11. Both guide rods 214 pass through the mounting ring 31, which slides in conjunction with the guide rods 214. The guide rods 214 guide the mounting ring 31, increasing the stability of the mounting ring 31 sliding along the length of the guide rods 214.

[0049] Reference Figure 5 The mounting base 321 has a through arc-shaped groove 325 through which the mounting ring 31 passes. The mounting base 321 and the mounting ring 31 slide against each other. The mounting base 321 is provided with a fixing component 36 for fixing the mounting base 321. Specifically, the fixing component 36 includes a fixing block 361 and a screw 362. The fixing block 361 is fixed to the mounting base 321, and the screw 362 is threadedly engaged with the fixing block 361. The end of the screw 362 abuts against the mounting ring 31. When the end of the screw 362 abuts against the fixing block 361, the friction between the end of the screw 362 and the fixing block 361 has a fixing effect on the fixing block 361, thereby fixing the fixing block 361 to the mounting ring 31, and further fixing the mounting base 321 and the motor to the mounting ring 31. When it is necessary to adjust the position of the gear 323 along the circumference of the mounting ring 31, the operator can easily rotate the screw 362 to move the screw 362 away from the mounting ring 31, thereby releasing the abutment of the end of the screw 362 against the mounting ring 31, thus facilitating the operator to adjust the position of the mounting base 321 and the motor along the circumference of the mounting ring 31, and thus facilitating the adjustment of the position of the gear 323 along the circumference of the mounting ring 31. A knob 363 is fixedly provided on the screw 362. The operator can rotate the screw 362 by rotating the knob 363, which has a labor-saving effect.

[0050] Continue to refer to Figure 5The second driving component 34 includes a support block 341, a rotating rod 342, and a second miniature motor 343. The support block 341 is fixed to the mounting ring 31, and the rotating rod 342 is fixed to the rotating block 33. The end of the rotating rod 342 passes through the mounting ring 31 and the support block 341 in sequence. The rotating rod 342 is rotatably connected to the mounting ring 31 and the support block 341. The second miniature motor 343 is fixed to the support block 341, and the output shaft of the second miniature motor 343 is fixedly connected to the end of the rotating rod 342. The mounting ring 31 supports the support block 341, and the support block 341 supports the second miniature motor 343. The second miniature motor 343 drives the rotating rod 342 to rotate, which in turn drives the rotating block 33 to rotate. The rotating block 33 then drives the magnet 35 to rotate, thereby facilitating the adjustment of the tilt angle of the magnet 35 and, consequently, the adjustment of the focal length of the liquid lens.

[0051] Continue to refer to Figure 5 The rotating block 33 has a second mounting groove 331, in which the magnet 35 is fixed. The second mounting groove 331 positions the magnet 35, increasing the efficiency of the operator in installing the magnet 35 onto the rotating block 33. The rotating block 33 also has a threaded fitting of a grommet screw 332, the end of which abuts against the surface of the magnet 35, thereby fixing the magnet 35 onto the rotating block 33 and increasing the ease of installation and removal of the magnet 35.

[0052] The implementation principle of the above embodiment is as follows: when the distance between the magnet 35 and the transparent elastic film 24 is relatively long, the magnetic force on the film is weak; when the distance between the magnet 35 and the transparent elastic film 24 remains unchanged, the magnetic force on the transparent elastic film 24 is constant, and a stable curvature can be formed; when the magnet 35 approaches the transparent elastic film 24, the magnetic force increases, and the curvature of the transparent elastic film 24 increases; when the user needs to adjust the curvature of the lens, the first driving member 32 drives the mounting ring 31 to move towards or away from the transparent elastic film 24, and the mounting ring 31 drives the magnet 35 to move towards or away from the transparent elastic film 24; at the same time, the second driving member 34 drives the rotating member to rotate, and the rotating member drives the magnet 35 to rotate, thereby facilitating the adjustment of the angle of the magnet 35, and thus adjusting the focal length of the liquid lens, which has the advantages of compact structure and flexible control.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A magnetically controlled zoom liquid lens characterized by: The utility model provides a zoom lens, including shell (1), be provided with zoom assembly (2) and adjustment assembly (3) in shell (1), zoom assembly (2) includes zoom cylinder (21), one end of zoom cylinder (21) is installed with first zoom lens (22), the other end of zoom cylinder (21) is installed with second zoom lens (23), be installed with transparent elastic film (24) in zoom cylinder (21), transparent elastic film (24) divides into first cavity (25) and second cavity (26) with the second cavity (26) in zoom cylinder (21) is filled with two different liquids respectively, Adjustment assembly (3) includes mounting ring (31), first drive (32), rotating block (33), second drive (34) and magnet (35), mounting ring (31) is arranged in shell (1) and slides, and first drive (32) is used for driving mounting ring (31) to move towards the direction close to or away from transparent elastic film (24), rotating block (33) is rotatably connected with mounting ring (31), magnet (35) is fixed on rotating block (33), and second drive (34) is used for driving rotating block (33) to rotate, First drive (32) includes mounting seat (321), first small motor (322), gear (323) and rack (324), mounting seat (321) is fixed on mounting ring (31), first small motor (322) is fixed on mounting seat (321), gear (323) is sleeved on the output shaft of first small motor (322) and is fixedly connected with the output shaft of first small motor (322), rack (324) is fixed in shell (1), gear (323) and rack (324) are engaged with each other, Second drive (34) includes support block (341), rotating rod (342) and second small motor (343), support block (341) is fixed on mounting ring (31), rotating rod (342) is fixed on rotating block (33), the end of rotating rod (342) passes through mounting ring (31) and support block (341) in proper order, rotating rod (342) is rotatably connected with mounting ring (31), rotating rod (342) is rotatably connected with support block (341), second small motor (343) is fixed on support block (341), and the output shaft of second small motor (343) is fixedly connected with the end of rotating rod (342).

2. A magnetorheological variable focus liquid lens according to claim 1, wherein: Arc slot (325) is formed in mounting seat (321), mounting ring (31) passes through arc slot (325), mounting seat (321) and mounting ring (31) are slidingly matched, and fixing assembly (36) for fixing mounting seat (321) is arranged on mounting seat (321).

3. A magnetorheological variable focus liquid lens according to claim 2, wherein: The fixing assembly (36) comprises a fixing block (361) fixed to the mounting base (321) and a screw rod (362) threadedly matched with the fixing block (361), and the end of the screw rod (362) abuts against the mounting ring (31).

4. A magnetorheological variable focus liquid lens according to claim 3, wherein: A knob (363) is fixedly arranged on the screw rod (362).

5. A magnetorheological variable focus liquid lens according to claim 4, wherein: A first mounting groove (326) is formed in the mounting base (321), and the first small motor (322) is fixed in the first mounting groove (326).

6. A magnetorheological variable focus liquid lens according to claim 1, wherein: An inner side wall of the shell (1) is provided with a positioning groove (113), and an outer side wall of the rack (324) abuts against an inner side wall of the positioning groove (113).

7. A magnetorheological variable focus liquid lens according to claim 6, wherein: A positioning rod (114) is fixedly arranged in the positioning groove (113), and a positioning hole is formed in the rack (324), and the positioning rod (114) is insertedly matched with the positioning hole.

8. A magnetorheological variable focus liquid lens according to claim 1, wherein: A second mounting groove (331) is formed in the rotating block (33), and the magnet (35) is fixed in the second mounting groove (331).

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