A lens structure with variable and fixed aperture conversion

Abstract

The utility model provides a kind of lens structure that variable aperture and fixed aperture can be converted, including main lens barrel, aperture module and focusing assembly;Focusing assembly is detachably connected with main lens barrel;Aperture module is connected at installation interface, locking hole and connecting hole are equipped on installation interface, through slot extends to installation interface, and form step on installation interface;When lens is variable aperture lens, aperture module includes movable ring and blade, one end of blade is hinged with connecting hole, extension part extends into through slot, extension part is connected with lever, main lens barrel is rotatably connected with aperture adjusting ring connected with lever;When lens is fixed aperture lens, aperture module includes fixed aperture ring with fixed hole, first screw is connected with locking hole after passing through fixed hole with screw connection. Fixed ring is fixedly connected to lens barrel. Based on main lens barrel and optical system, different aperture components are matched to derive multiple models, save design and mold cost, optimize supply chain, reduce inventory and logistics expenses.

Description

Technical Field

[0001] This utility model relates to the field of lens technology, and in particular to a lens structure that can switch between variable aperture and fixed aperture. Background Technology

[0002] Currently, optical imaging lenses on the market are mainly divided into two categories: fixed-aperture lenses and variable-aperture lenses. Fixed-aperture lenses have a simple structure, low cost, and stable light transmission, and are widely used in scenarios such as industrial inspection and security monitoring where constant depth of field and light transmission are required. Variable-aperture lenses, on the other hand, can control the amount of light and depth of field by adjusting the aperture size, and are widely used in fields such as photography, videography, and high-end mobile phones where flexible control of imaging effects is required. However, existing lens designs are usually "dedicated to a specific device," with one lens structure corresponding to only one aperture mode. This leads to the following problems for lens manufacturers and users: 1. High development costs: Two completely different mechanical structures need to be designed for fixed aperture and variable aperture respectively, doubling the mold opening and management costs.

[0003] 2. High inventory pressure: It is necessary to stock two completely different finished lenses and spare parts, which increases warehousing and logistics costs.

[0004] 3. Poor compatibility: Once the user's application scenario changes (such as from industrial inspection with fixed lighting to creative photography that requires background blur), the original lens cannot be adapted, and the entire mechanical structure of the lens must be replaced, resulting in a waste of resources.

[0005] Therefore, there is an urgent need for a lens structure that is compatible with both aperture modes and has low conversion costs. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a lens structure that can switch between variable aperture and fixed aperture, which can achieve the switching between fixed aperture and variable aperture modes by replacing a few parts on the same lens body structure, thereby improving the versatility and compatibility of lens design and reducing the manufacturer's inventory and the user's total cost of ownership.

[0007] This utility model is implemented as follows: This utility model provides a lens structure that can switch between variable aperture and fixed aperture, including a main lens barrel, a first lens group, an aperture module and a focusing component; The first lens group is located at one end of the main lens barrel, and the focusing assembly is detachably connected to the other end of the main lens barrel; An installation interface is provided on the inner side of the main lens barrel. A first through hole is provided at the center of the installation interface. The installation interface is located between the first lens group and the second lens group. The aperture module is connected to the installation interface. The installation interface is provided with a locking hole and several connecting holes. A through groove is provided on the outer side of the main lens barrel at a position corresponding to the installation interface. The through groove extends to the installation interface and forms a step on the installation interface. When the lens is a variable aperture lens, the aperture module includes a movable ring and several blades. A second through hole is provided at the center of the movable ring. The connecting hole corresponds one-to-one with the blade, and one end of the blade is hinged to the connecting hole. The movable ring has several elongated holes, each corresponding one-to-one with the blade. The other end of the blade is slidably connected in the elongated holes. The movable ring has an extension on the side facing the mounting interface. The extension extends into the through groove and is connected to a lever. An aperture adjustment ring is rotatably connected to the outside of the main lens barrel, and the lever is connected to the aperture adjustment ring. When the lens is a fixed aperture lens, the aperture module includes a fixed aperture ring with a light-transmitting hole at its center and a fixing hole along its outer edge. The fixing hole corresponds to a locking hole, and a first screw passes through the fixing hole and is screwed into the locking hole. A fixing ring for blocking the through slot is fixedly connected to the outside of the lens barrel.

[0008] Furthermore, when the lens is a variable aperture lens, a retaining ring groove is provided inside the main lens barrel, and a retaining ring is connected to the retaining ring, which contacts the movable ring.

[0009] Furthermore, the focusing assembly includes a focusing tube, a second lens group, a cam ring, and a focusing ring. The second lens group is installed inside the focusing tube. The focusing tube slides along the axial direction of the main lens barrel. The cam ring is rotatably connected to the outside of the main lens barrel. The cam ring has a spiral-shaped first guide groove. The focusing tube is connected to a guide pin, the upper end of which is connected to the first guide groove. The focusing ring is rotatably connected to the outside of the main lens barrel and covers the cam ring. The inner side of the focusing ring has a flange portion, which is fixedly connected to the cam ring.

[0010] Furthermore, a second guide groove is provided on the side wall of the main lens barrel. The second guide groove extends along the axial direction of the main lens barrel. The guide pin is slidably connected in the second guide groove. When the cam ring rotates, the focusing tube slides along the axial direction of the main lens barrel under the action of the first guide groove and the second guide groove.

[0011] Furthermore, the cam ring is provided with several locking holes, and the focusing ring is provided with a fourth through hole corresponding to the locking holes. The locking holes are connected to locking screws. When fixing the cam ring, the end of the locking screw passes through the fourth through hole and the locking hole and abuts against the outer wall of the main lens barrel.

[0012] Furthermore, the end of the main lens barrel away from the first lens group is also provided with an interface. The end face of the main lens barrel is provided with several screw holes. The interface is provided with a third through hole. After the second screw passes through the third through hole, it is screwed into the screw hole to fix the interface.

[0013] The advantages of this invention are: manufacturers only need to develop one main lens barrel and optical system, and can derive multiple models by matching different aperture components, greatly saving design and mold costs. Furthermore, only one main lens and two small aperture ring parts need to be stocked, rather than two completely different finished lens products, which greatly optimizes supply chain management and saves inventory and logistics costs.

[0014] Users or system integrators can flexibly configure the most suitable aperture mode for the device according to the final application scenario, and can even upgrade or modify it on-site later according to changes in needs, realizing multiple uses of one lens. It is suitable for manufacturers whose product lines cover multiple industries, such as companies that simultaneously target industrial machine vision and consumer drones. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a structural diagram of the lens of this utility model when it has a variable aperture.

[0017] Figure 2 for Figure 1 The diagram shows the structure behind the hidden marking ring and focusing ring of the lens.

[0018] Figure 3 for Figure 1 An exploded view of the lens structure shown.

[0019] Figure 4 for Figure 1 A cross-sectional view of the lens structure shown.

[0020] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle.

[0021] Figure 6 This is a schematic diagram of the movable ring structure in this utility model.

[0022] Figure 7 This is a schematic diagram of the structure of several blades combined according to this utility model.

[0023] Figure 8 This is a schematic diagram of the main lens barrel structure in this utility model. Figure 1 .

[0024] Figure 9 This is a schematic diagram of the main lens barrel structure in this utility model. Figure 2 .

[0025] Figure 10 This is a schematic diagram of the connection structure of the cam ring, focusing ring and interface in this utility model.

[0026] Figure 11 This is a schematic diagram of the aperture adjustment ring in this utility model.

[0027] Figure 12 This is a schematic diagram of the structure of the lens of this utility model when the aperture is fixed.

[0028] Figure 13 for Figure 12 An exploded view of the lens structure shown.

[0029] Figure 14 This is a schematic diagram of the aperture module of this utility model, which is a fixed aperture ring.

[0030] Explanation of the labels in the diagram: 1. Main lens barrel; 11. Mounting interface; 111. First through hole; 112. Locking hole; 113. Connecting hole; 114. Snap ring groove; 115. Second guide groove; 116. Screw hole; 12. Through groove; 13. Step; 2. First lens group; 3. Aperture module; 31. Movable ring; 311. Second through hole; 312. Long strip hole; 32. Blade; 321. First light-transmitting hole; 33. Extension; 34. Lever; 35. Aperture adjustment 36. Fixing ring; 361. Second light-transmitting hole; 362. Fixing hole; 37. Fixing ring; 38. Retaining ring; 4. Focusing assembly; 41. Focusing cylinder; 42. Second lens group; 43. Cam ring; 431. First guide groove; 432. Set hole; 44. Focusing ring; 441. Flange; 442. Fourth through hole; 45. Guide pin; 46. Set screw; 5. Interface; 51. Third through hole; 52. Protrusion. Detailed Implementation

[0031] Please see Figures 1 to 14 This utility model provides a lens structure that can switch between variable aperture and fixed aperture, including a main lens barrel 1, a first lens group 2, an aperture module 3 and a focusing component 4; the first lens group 2 and the focusing component 4 can adopt the structure in the prior art.

[0032] The first lens group 2 is located at one end of the main lens barrel 1 and is fixed inside the main lens barrel 1. The focusing assembly 4 is detachably connected to the other end of the main lens barrel 1. The main lens barrel 1 has a mounting interface 11 on its inner side. The mounting interface 11 has a first through hole 111 at its center. The mounting interface 11 is located between the first lens group 2 and the second lens group 42. The aperture module 3 is connected to the mounting interface 11. The mounting interface 11 has a locking hole 112 and several connecting holes 113. The connecting holes 113 are arranged in a ring array on the mounting interface 11. The main lens barrel 1 has a through groove 12 at a position corresponding to the mounting interface 11 on its outer side. The through groove 12 extends to the mounting interface 11 and forms a step 13 on the mounting interface 11. like Figures 1 to 11 As shown, when the lens is a variable aperture lens (i.e., a variable aperture adjustable focus lens), the aperture module 3 includes a movable ring 31 and several blades 32. The several blades 32 are arranged in a circular array, and the center enclosed by the several blades 32 forms a first light-transmitting hole 321. A second through hole 311 is provided at the center of the movable ring 31. The connecting hole 113 corresponds one-to-one with the blade 32, and one end of the blade 32 is hinged to the connecting hole 113. The movable ring 31 has several elongated holes 312, and the elongated holes 312 correspond one-to-one with the blades 32. The other end of the blade 32 is slidably connected in the elongated hole 312. The movable ring 31 has an extension 33 on the side facing the mounting interface 11. The extension 33 extends into the through groove 12 and is connected to a lever 34. The lever 34 and the extension 33 are detachably connected. An aperture adjustment ring 35 is rotatably connected to the outside of the main lens barrel 1. The lever 34 is connected to the aperture adjustment ring 35. The aperture adjustment ring 35 has a groove 351 on its inner side, and the upper end of the lever 34 is connected to the groove 351. The extension 33 extending into the through groove 12 serves two purposes. First, when the user excessively rotates the aperture adjustment ring 35, the side of the extension 33 contacts the side wall of the through groove 12, which can prevent the lever 34 from bending. Second, it allows for a more compact lens structure and reduces the size of the lens. It is worth mentioning that when the lens is a variable aperture lens, there is also an indicator ring 6 between the aperture adjustment ring 35 and the focus ring 44. The indicator ring 6 is fixed to the outside of the main lens barrel 1 by means of screw connection. The indicator ring has a first indicator line and a first scale. The aperture adjustment ring 35 has a second scale. The first indicator line and the second scale are used together to indicate the current aperture size. The focus ring 44 has a second indicator line. The second indicator line is used together with the first scale to indicate the current focus value.

[0033] like Figures 12 to 14As shown, when the lens is a fixed aperture lens (i.e., a fixed aperture adjustable focus lens), the aperture module 3 includes a fixed aperture ring 36. The fixed aperture ring 36 has a second light-transmitting hole 361 at its center, and a fixing hole 362 along its outer edge. The fixing hole 362 corresponds to a locking hole 112. A first screw passes through the fixing hole 362 and is screwed into the locking hole 112. A fixing ring 37 for blocking the through slot 12 is fixedly connected to the outside of the lens barrel. Since the lens is a fixed aperture lens, the fixing ring 37 has graduations, and the focusing ring 44 has markings. These two components work together to provide feedback on the current focus value.

[0034] In this invention, when converting a variable aperture lens to a fixed aperture lens, after removing the focusing assembly 4, the movable ring 31 and blade 32 can be removed, along with the lever 34 and aperture adjustment ring 35. Then, the fixed aperture ring 36 is installed on the mounting interface 11, and the fixed ring 37 is installed on the outside of the main lens barrel 1. After installing the focusing assembly 4 at the other end of the main lens barrel 1, the switch from a variable aperture lens to a fixed aperture lens is completed. Conversely, by removing the fixed aperture ring 36 and installing the movable ring 31 and blade 32 on the mounting interface 11, the switch from a fixed aperture lens to a variable aperture lens is completed.

[0035] Specifically, such as Figure 5 As shown, when the lens is a variable aperture lens, a retaining ring groove 114 is also provided on the inner side of the main lens barrel 1. A retaining ring 38 is connected to the retaining ring groove 114, and the retaining ring 38 contacts the movable ring 31. The retaining ring 38 is used to fix the movable ring 31 along the axial direction of the main lens barrel 1.

[0036] Specifically, such as Figure 2 , Figure 3 or Figure 13 As shown, the focusing assembly 4 includes a focusing tube 41, a second lens group 42, a cam ring 43, and a focusing ring 44. The focusing tube 41 is coaxially connected to the main lens barrel 1. The second lens group 42 is installed inside the focusing tube 41. The focusing tube 41 slides along the axial direction of the main lens barrel 1. The cam ring 43 is rotatably connected to the outside of the main lens barrel 1. The cam ring 43 has a spiral-shaped first guide groove 431. The focusing tube 41 is connected to a guide pin 45, which is detachably connected to the focusing tube 41. The upper end of the guide pin 45 is connected to the first guide groove 431. The focusing ring 44 is rotatably connected to the outside of the main lens barrel 1 and covers the cam ring 43. The inner side of the focusing ring 44 has a flange 441, which is fixedly connected to the end face of the cam ring 43. The flange 441 and the cam ring 43 are connected by a third screw.

[0037] Specifically, such as Figure 8 and 9As shown, a second guide groove 115 is provided on the side wall of the main lens barrel 1. The second guide groove 115 extends along the axial direction of the main lens barrel 1. The guide pin 45 is slidably connected in the second guide groove 115. When the cam ring 43 rotates, the focusing tube 41 slides along the axial direction of the main lens barrel 1 under the action of the first guide groove 431 and the second guide groove 115.

[0038] Specifically, such as Figure 10 As shown, the cam ring 43 is also provided with a plurality of locking holes 432, and the focusing ring 44 is provided with a fourth through hole 442 corresponding to the locking holes 432. The locking holes 432 are connected to locking screws 46. When fixing the cam ring 43, the end of the locking screw 46 passes through the fourth through hole 442 and the locking hole 432 and abuts against the outer wall of the main lens barrel 1.

[0039] Specifically, the end of the main lens barrel 1 away from the first lens group 2 is also provided with an interface 5. The end face of the main lens barrel 1 is provided with several screw holes 116. The interface 5 is provided with a third through hole 51. After the second screw passes through the third through hole 51, it is screwed into the screw hole 116 to fix the interface 5. The connector is also provided with a protrusion 52 extending towards the focusing ring 44. The protrusion 52 abuts against the flange 441 to axially fix the focusing ring 44 and the cam ring 43.

[0040] One specific application of this utility model is: When converting a variable aperture lens to a fixed aperture lens, first remove the interface 5 from the main lens barrel 1, and after removing the third screw, separate the focusing ring 44 from the cam ring 43. At this time, the guide pin 45 is exposed.

[0041] After removing the guide pin 45 from the focusing tube 41, the focusing tube 41, cam ring 43, marker ring, and aperture adjustment ring 35 can all be removed from the main lens barrel 1. After removing the focusing tube 41, the movable ring 31 is exposed. After removing the retaining ring 38 and the lever 34, the movable ring 31 and the blade 32 can be removed from the mounting interface 11.

[0042] Next, install the fixed aperture ring 36 onto the mounting interface 11, and the fixed ring 37 onto the outside of the main lens barrel 1. After installing the focusing assembly 4 at the other end of the main lens barrel 1, the switch from a variable aperture lens to a fixed aperture lens is completed. Conversely, by removing the fixed aperture ring 36 and installing the movable ring 31 and blade 32 onto the mounting interface 11, the switch from a fixed aperture lens to a variable aperture lens is completed. Regarding the installation of the focusing assembly 4: After the aperture module 3 is installed on the mounting interface 11, the focusing tube 41 containing the second lens group 42 is installed inside the main lens barrel 1, and the cam ring 43 is fitted onto the outside of the main lens barrel 1. The guide pin 45 is passed through the first guide groove 431 and the second guide groove 115 and then connected to the focusing tube 41. At this time, by rotating the cam ring 43, the focusing tube 41 moves along the axial direction of the main lens barrel 1 under the guidance of the first guide groove 431 and the second guide groove 115.

[0043] After the cam ring 43 is installed, the focusing ring 44 is fitted onto the outside of the main lens barrel 1, so that the focusing ring 44 covers the cam ring 43 and the flange portion 441 contacts the end face of the cam ring 43. The focusing ring 44 and the cam ring 43 are then fixedly connected by the third screw. Subsequently, the interface 5 is installed on the outside of the main lens barrel 1, and the protrusion 52 of the interface 5 abuts against the flange portion 441 of the focusing ring 44. After tightening the second screw, the focusing assembly 4 is fixed to the other end of the main lens barrel 1.

[0044] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A lens structure that can switch between variable aperture and fixed aperture, characterized in that: It includes the main lens barrel, the first lens group, the aperture module, and the focusing assembly; The first lens group is located at one end of the main lens barrel, and the focusing assembly is detachably connected to the other end of the main lens barrel; An installation interface is provided on the inner side of the main lens barrel. A first through hole is provided at the center of the installation interface. The installation interface is located between the first lens group and the second lens group. The aperture module is connected to the installation interface. The installation interface is provided with a locking hole and several connecting holes. A through groove is provided on the outer side of the main lens barrel at a position corresponding to the installation interface. The through groove extends to the installation interface and forms a step on the installation interface. When the lens is a variable aperture lens, the aperture module includes a movable ring and several blades. A second through hole is provided at the center of the movable ring. The connecting hole corresponds one-to-one with the blade, and one end of the blade is hinged to the connecting hole. The movable ring has several elongated holes, each corresponding one-to-one with the blade. The other end of the blade is slidably connected in the elongated holes. The movable ring has an extension on the side facing the mounting interface. The extension extends into the through groove and is connected to a lever. An aperture adjustment ring is rotatably connected to the outside of the main lens barrel, and the lever is connected to the aperture adjustment ring. When the lens is a fixed aperture lens, the aperture module includes a fixed aperture ring, a light-transmitting hole at the center of the fixed aperture ring, and a fixing hole at the outer edge of the fixed aperture ring. The fixing hole corresponds to the locking hole. After the first screw passes through the fixing hole, it is screwed to the locking hole. A fixing ring for blocking the through groove is fixedly connected to the outside of the lens barrel.

2. The lens structure that can switch between variable aperture and fixed aperture as described in claim 1, characterized in that: When the lens is a variable aperture lens, a retaining ring groove is also provided on the inner side of the main lens barrel. The retaining ring groove is connected to a retaining ring, and the retaining ring is in contact with the movable ring.

3. The lens structure that can switch between variable aperture and fixed aperture as described in claim 1, characterized in that: The focusing assembly includes a focusing tube, a second lens group, a cam ring, and a focusing ring. The second lens group is installed inside the focusing tube. The focusing tube slides along the axial direction of the main lens barrel. The cam ring is rotatably connected to the outside of the main lens barrel. The cam ring has a spiral-shaped first guide groove. The focusing tube is connected to a guide pin, the upper end of which is connected to the first guide groove. The focusing ring is rotatably connected to the outside of the main lens barrel and covers the cam ring. The inner side of the focusing ring has a flange portion, which is fixedly connected to the cam ring.

4. The lens structure that can switch between variable aperture and fixed aperture as described in claim 3, characterized in that: The main lens barrel has a second guide groove on its side wall. The second guide groove extends along the axial direction of the main lens barrel. The guide pin is slidably connected in the second guide groove. When the cam ring rotates, the focusing tube slides along the axial direction of the main lens barrel under the action of the first guide groove and the second guide groove.

5. The lens structure that can switch between variable aperture and fixed aperture as described in claim 3, characterized in that: The cam ring is also provided with several locking holes, and the focusing ring is provided with a fourth through hole corresponding to the locking holes. The locking holes are connected to locking screws. When fixing the cam ring, the end of the locking screw passes through the fourth through hole and the locking hole and abuts against the outer wall of the main lens barrel.

6. The lens structure that can switch between variable aperture and fixed aperture as described in claim 1, characterized in that: The main lens barrel is also provided with an interface at the end away from the first lens group. The end face of the main lens barrel is provided with several screw holes. The interface is provided with a third through hole. After the second screw passes through the third through hole, it is screwed into the screw hole to fix the interface.

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