CN116679365A - Diaphragm adjusting device of camera lens and camera lens - Google Patents

Diaphragm adjusting device of camera lens and camera lens Download PDF

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Publication number
CN116679365A
CN116679365A CN202310569464.3A CN202310569464A CN116679365A CN 116679365 A CN116679365 A CN 116679365A CN 202310569464 A CN202310569464 A CN 202310569464A CN 116679365 A CN116679365 A CN 116679365A
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CN
China
Prior art keywords
diaphragm
groups
lens
main cylinder
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310569464.3A
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Chinese (zh)
Inventor
吴沛林
李兆佳
李四清
白振
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Hunan Chiopt Optical Technology Co ltd
Original Assignee
Hunan Chiopt Optical Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Hunan Chiopt Optical Technology Co ltd filed Critical Hunan Chiopt Optical Technology Co ltd
Priority to CN202310569464.3A priority Critical patent/CN116679365A/en
Publication of CN116679365A publication Critical patent/CN116679365A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

The invention discloses a diaphragm adjusting device of a lens and the lens, the lens comprises a main cylinder and two groups movably arranged in the main cylinder, the two groups are provided with first empty avoidance grooves extending along the circumferential direction of the two groups, and the diaphragm adjusting device comprises: the diaphragm assembly is assembled with the two groups, and a cam plate for adjusting the size of a diaphragm hole in the diaphragm assembly extends out of the diaphragm assembly; the diaphragm extension ring comprises a rod part and a ring part which are connected, wherein the rod part penetrates through the first clearance groove and is movably connected with the cam plate through a limit groove on the rod part, so that the cam plate can move in the limit groove along the moving direction of two groups; the ring part is rotatably sleeved in the main cylinder; and the limiting structure is connected with the diaphragm extension ring and the main cylinder and is used for limiting the diaphragm extension ring to move on the main cylinder along the moving directions of the two groups. The invention can solve the problem of easy damage to structural members.

Description

Diaphragm adjusting device of camera lens and camera lens
Technical Field
The present invention relates to the field of optical lenses, and in particular, to a diaphragm adjusting device for a lens and a lens.
Background
In some conventional large-movement-amount lenses, as diaphragm adjusting structures, a structure for extending the movement amount of a diaphragm assembly is generally selected, and the diaphragm assembly is arranged on a group provided with the diaphragm assembly and moves along with focusing of the lens. However, when the optical back focal length of the lens is shorter than the flange distance (the group protrudes from the interface) and the focusing movement amount is large, the conventional diaphragm adjusting structure also protrudes out of the group together with the group, so that the appearance of the lens is attractive and structural members are easy to damage.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a diaphragm adjusting device of a lens and the lens, which can solve the problem of easy damage to structural members.
In a first aspect, an embodiment of the present invention provides a diaphragm adjusting device for a lens, where the lens includes a main barrel and two groups movably disposed in the main barrel, and the two groups are provided with first empty avoidance grooves extending along a circumferential direction of the two groups, and the diaphragm adjusting device includes:
the diaphragm assembly is assembled with the two groups, and a cam plate for adjusting the size of a diaphragm hole in the diaphragm assembly extends out of the diaphragm assembly;
the diaphragm extension ring comprises a rod part and a ring part which are connected, wherein the rod part penetrates through the first clearance groove and is movably connected with the cam plate through a limiting groove on the rod part, so that the cam plate can move along the two groups of moving directions in the limiting groove; the ring part is rotatably sleeved in the main cylinder;
and the limiting structure is connected with the diaphragm extension ring and the main cylinder and used for limiting the diaphragm extension ring to move on the main cylinder along the moving directions of the two groups.
According to the first aspect of the invention, the diaphragm adjusting device of the lens has at least the following technical effects:
the invention comprises a main cylinder and two groups movably arranged in the main cylinder, wherein the two groups are provided with first clearance grooves extending along the circumferential directions of the two groups, and the first clearance grooves are used for avoiding the extension rings of the diaphragm to prevent structural interference; the diaphragm assembly is assembled with two groups, the diaphragm assembly extends to form a cam plate for adjusting the size of a diaphragm hole in the diaphragm assembly, the diaphragm extension ring comprises a rod part and a ring part, the rod part penetrates through the first clearance groove and is movably connected with the cam plate through a limiting groove on the rod part, so that the cam plate can move in the limiting groove along the moving direction of the two groups, the ring part is rotatably sleeved in the main cylinder, the two groups can move up and down to drive the diaphragm assembly to move during focusing, the rod part of the diaphragm extension ring penetrates through the first clearance groove and is movably connected with the cam plate through the limiting groove on the rod part, the diaphragm extension ring drives the cam plate to rotate through the limiting groove to adjust the size of the diaphragm, but the ring part of the diaphragm extension ring is rotatably sleeved in the main cylinder, and the diaphragm extension ring is limited to move in the moving direction of the two groups on the main cylinder through the limiting structure, so that the diaphragm extension ring does not participate in the movement of a lens focusing, and structural members cannot be damaged.
According to some embodiments of the invention, the ring part is sleeved on the inner side of the main cylinder, the diaphragm adjusting device further comprises a diaphragm adjusting cylinder, and the diaphragm adjusting cylinder is connected with the diaphragm extension ring and sleeved on the outer side of the main cylinder.
According to some embodiments of the present invention, the limiting structure includes a deflector rod, a first assembly hole provided on the diaphragm adjusting cylinder, a second assembly hole provided on the rod portion, and a rotation limiting groove provided on the main cylinder and extending along a circumferential direction of the main cylinder, one end of the deflector rod sequentially passes through the first assembly hole, the rotation limiting groove, and the second assembly hole, and the deflector rod can move along the circumferential direction of the main cylinder in the rotation limiting groove.
According to some embodiments of the invention, the limiting structure further comprises an interface and a first step arranged on the inner side of the main cylinder, the interface is fixedly connected with one side of the main cylinder through a screw, and the diaphragm extension ring is positioned between the first step and the interface and is in clearance fit with the interface.
According to some embodiments of the invention, the diaphragm adjustment cylinder is located between a second step provided on the outside of the main cylinder and the interface and is in clearance fit with the interface.
According to some embodiments of the invention, the cam plate comprises a first plate part parallel to the two ports of the main cylinder and a second plate part perpendicular to the two ports of the main cylinder, wherein the first plate part and the second plate part are connected in a 7 shape, and the second plate part is connected with the limit groove in a matching way.
According to some embodiments of the invention, the length of the second plate portion engaged with the limiting groove is longer than the maximum length of the relative movement between the main barrel and the two groups.
According to some embodiments of the invention, a first round angle is arranged at one end of the cam plate, which is contacted with the limit groove, and a second round angle is arranged at one end of the limit groove, which is close to the ring part, and the first round angle is matched with the second round angle.
According to some embodiments of the invention, the lens further comprises a group, the group is connected with one end of the main barrel away from the two groups, a second clearance groove is formed in the group, and the rod part extends into the second clearance groove towards the direction of the group.
In a second aspect, an embodiment of the present invention further provides a lens, where the lens is provided with the diaphragm adjusting device of the lens.
The diaphragm adjusting device according to the embodiment of the second aspect of the present invention has at least the following technical effects:
the lens comprises a main cylinder and two groups movably arranged in the main cylinder, wherein the two groups are provided with first clearance grooves extending along the circumferential directions of the two groups, and the first clearance grooves are used for avoiding the extension rings of the diaphragm to prevent structural interference; the diaphragm assembly is assembled with two groups, the diaphragm assembly extends to form a cam plate for adjusting the size of a diaphragm hole in the diaphragm assembly, the diaphragm extension ring comprises a rod part and a ring part, the rod part penetrates through the first clearance groove and is movably connected with the cam plate through a limiting groove on the rod part, so that the cam plate can move in the limiting groove along the moving direction of the two groups, the ring part is rotatably sleeved in the main cylinder, the two groups can move up and down to drive the diaphragm assembly to move during focusing, the rod part of the diaphragm extension ring penetrates through the first clearance groove and is movably connected with the cam plate through the limiting groove on the rod part, the diaphragm extension ring drives the cam plate to rotate through the limiting groove to adjust the size of the diaphragm, but the ring part of the diaphragm extension ring is rotatably sleeved in the main cylinder, and the diaphragm extension ring is limited to move in the moving direction of the two groups on the main cylinder through the limiting structure, so that the diaphragm extension ring does not participate in the movement of a lens focusing, and structural members cannot be damaged.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is an exploded view of a lens assembly according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view of a lens focusing process according to an embodiment of the present invention;
FIG. 3 is an assembled view of an iris extension ring of an embodiment of the invention;
FIG. 4 is a three-dimensional schematic view of a diaphragm assembly according to an embodiment of the invention;
FIG. 5 is an assembly view of two groups and diaphragm assemblies according to an embodiment of the present invention;
FIG. 6 is a three-dimensional schematic of a group according to an embodiment of the invention;
FIG. 7 is an assembled view of a main barrel and diaphragm extender ring according to an embodiment of the present invention;
FIG. 8 is an assembled view of a diaphragm adjustment and lever according to an embodiment of the present invention;
FIG. 9 is an interface assembly diagram of an embodiment of the present invention;
FIG. 10 is a structural assembly view of a focus mount according to an embodiment of the present invention;
description of the reference numerals:
110. a fixed cylinder; 120. a focusing barrel; 130. a CAM cartridge; 131. a curved slot; 140. a group of groups; 141. a second void-avoidance groove; 142. a second positioning hole; 150. a main barrel; 151. a first step; 152. a second step; 153. a linear groove; 154. rotating the limit groove; 160. a diaphragm assembly; 161. a cam plate; 162. a first rounded corner; 163. a first plate portion; 164. a second plate portion; 170. two groups; 171. a first void-avoidance groove; 172. a first positioning hole; 180. a diaphragm extension ring; 181. a stem portion; 182. a ring portion; 183. a limit groove; 184. a second assembly hole; 185. a second rounded corner; 186. assembling a counter bore; 190. a diaphragm adjusting cylinder; 191. a first assembly hole; 200. an interface; 210. driving PIN; 220. a deflector rod; 230. and (5) a screw.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, the description of first, second, etc. is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be determined reasonably by a person skilled in the art in combination with the specific content of the technical solution.
In some conventional large-movement-amount lenses, as diaphragm adjusting structures, a structure for extending the movement amount of a diaphragm assembly is generally selected, and the diaphragm assembly is arranged on a group provided with the diaphragm assembly and moves along with focusing of the lens. However, when the optical back focal length of the lens is shorter than the flange distance (the group protrudes from the interface) and the focusing movement amount is large, the conventional diaphragm adjusting structure also protrudes out of the group together with the group, so that the appearance of the lens is attractive and structural members are easy to damage.
To solve the above problems, the lens of the present invention includes a main barrel 150 and two groups 170 movably disposed in the main barrel 150, wherein the two groups 170 are provided with first empty-avoiding grooves 171 extending along the circumferential direction of the two groups 170, and the first empty-avoiding grooves 171 are used for avoiding an empty diaphragm extension ring 180 to prevent structural interference; the diaphragm assembly 160 is assembled with the two groups 170, the diaphragm assembly 160 extends to form a cam plate for adjusting the size of a diaphragm hole in the diaphragm assembly 160, the diaphragm extension ring 180 comprises a rod portion 181 and a ring portion 182 which are connected, the rod portion 181 penetrates through the first clearance groove 171 and is movably connected with the cam plate through a limiting groove 183 on the rod portion 181, so that the cam plate can move along the moving direction of the two groups 170 in the limiting groove 183, the ring portion 182 is rotatably sleeved in the main cylinder 150, the two groups 170 can move up and down during focusing to drive the diaphragm assembly 160 to move, the rod portion 181 of the diaphragm extension ring 180 penetrates through the first clearance groove 171 and is movably connected with the cam plate through the limiting groove 183 on the rod portion 181, the extension ring 180 drives the cam plate to rotate to adjust the size of the diaphragm, but the ring portion 182 of the diaphragm extension ring 180 is rotatably sleeved in the main cylinder 150, and the diaphragm extension ring 180 is limited to move along the moving direction of the two groups 170 on the main cylinder 150 through the limiting structure, so that the diaphragm extension ring 180 does not participate in the movement of a lens and does not damage a diaphragm structural member.
Referring to fig. 1 to 10, an embodiment of the present invention provides a diaphragm adjusting device for a lens, the lens including a main barrel 150 and two groups 170 movably disposed in the main barrel 150, the two groups 170 being provided with first empty avoiding grooves 171 extending along a circumferential direction of the two groups 170, the diaphragm adjusting device comprising:
the diaphragm assembly 160 is assembled with the two groups 170, and the diaphragm assembly 160 extends out of a cam plate for adjusting the size of a diaphragm hole in the diaphragm assembly 160;
the diaphragm extension ring 180 comprises a rod portion 181 and a ring portion 182 which are connected, wherein the rod portion 181 penetrates through the first clearance groove 171 and is movably connected with the cam plate through a limit groove 183 on the rod portion 181, so that the cam plate can move along the moving direction of the two groups 170 in the limit groove 183; the ring 182 is rotatably sleeved in the main cylinder 150;
and the limiting structure is connected with the diaphragm extension ring 180 and the main cylinder 150 and is used for limiting the diaphragm extension ring 180 to move on the main cylinder 150 along the moving directions of the two groups 170.
In this embodiment, the lens includes a main barrel 150 and two groups 170 movably disposed in the main barrel 150, wherein the two groups 170 are provided with first empty-avoiding grooves 171 extending along the circumferential direction of the two groups 170, and structural interference is prevented by the first empty-avoiding grooves 171 and an empty-avoiding diaphragm extension ring 180; the diaphragm assembly 160 is assembled with the two groups 170, the diaphragm assembly 160 extends to form a cam plate for adjusting the size of a diaphragm hole in the diaphragm assembly 160, the diaphragm extension ring 180 comprises a rod portion 181 and a ring portion 182 which are connected, the rod portion 181 penetrates through the first clearance groove 171 and is movably connected with the cam plate through a limiting groove 183 on the rod portion 181, so that the cam plate can move along the moving direction of the two groups 170 in the limiting groove 183, the ring portion 182 is rotatably sleeved in the main cylinder 150, the two groups 170 can move up and down during focusing to drive the diaphragm assembly 160 to move, the rod portion 181 of the diaphragm extension ring 180 penetrates through the first clearance groove 171 and is movably connected with the cam plate through the limiting groove 183 on the rod portion 181, the extension ring 180 drives the cam plate to rotate to adjust the size of the diaphragm, but the ring portion 182 of the diaphragm extension ring 180 is rotatably sleeved in the main cylinder 150, and the diaphragm extension ring 180 is limited to move along the moving direction of the two groups 170 on the main cylinder 150 through the limiting structure, so that the diaphragm extension ring 180 does not participate in the movement of a lens and does not damage a diaphragm structural member.
In some embodiments, the ring 182 is sleeved on the inner side of the main barrel 150, and the diaphragm adjusting device further includes a diaphragm adjusting barrel 190, where the diaphragm adjusting barrel 190 is connected to the diaphragm extension ring 180 and sleeved on the outer side of the main barrel 150.
In this embodiment, the diaphragm adjusting cylinder 190 is connected to the diaphragm extension ring 180, and the diaphragm adjusting cylinder 190 drives the diaphragm extension ring 180 to rotate, so as to adjust the size of the diaphragm.
In some embodiments, the limiting structure includes a lever 220, a first assembly hole 191 provided on the diaphragm adjusting cylinder 190, a second assembly hole 184 provided on the rod portion 181, and a rotation limiting groove 154 provided on the main cylinder 150 and extending along the circumferential direction of the main cylinder 150, one end of the lever 220 sequentially passes through the first assembly hole 191, the rotation limiting groove 154, and the second assembly hole 184, and the lever 220 can move along the circumferential direction of the main cylinder 150 in the rotation limiting groove 154.
In this embodiment, the diaphragm adjusting cylinder 190, the main cylinder 150 and the diaphragm extension ring 180 are connected together by passing the shift lever 220 through the first assembly hole 191, the rotation limiting groove 154 and the second assembly hole 184, and the rotation diaphragm adjusting cylinder 190 drives the diaphragm extension ring 180 to move circumferentially along the main cylinder 150 in the rotation limiting groove 154 by the shift lever 220, thereby controlling the maximum aperture and the minimum aperture of the diaphragm.
In some embodiments, the limiting structure further includes an interface 200 and a first step 151 disposed on the inner side of the main barrel 150, the interface 200 is fixedly connected to one side of the main barrel 150 by a screw 230, and the diaphragm extension ring 180 is located between the first step 151 and the interface 200 and is in clearance fit with the interface 200.
In the present embodiment, the position of the diaphragm extension ring 180 is fixed by the interface 200 and the first step 151, the diaphragm extension ring 180 is prevented from moving up and down, and the diaphragm extension ring 180 is clearance-fitted with the interface 200, so that the diaphragm extension ring 180 can be smoothly operated.
In some embodiments, the diaphragm adjustment cylinder 190 is located between the second step 152 disposed on the outside of the main cylinder 150 and the interface 200 and is in clearance fit with the interface 200.
In the present embodiment, the position of the diaphragm adjustment cylinder 190 is fixed by the interface 200 and the second step 152, the diaphragm adjustment cylinder 190 is prevented from moving up and down, and the diaphragm adjustment cylinder 190 is in clearance fit with the interface 200, so that the diaphragm adjustment cylinder 190 can be operated smoothly.
In some embodiments, the cam plate includes a first plate portion 163 parallel to the two ports of the main barrel 150 and a second plate portion 164 perpendicular to the two ports of the main barrel 150, the first plate portion 163 and the second plate portion 164 being connected in a 7-shape, wherein the second plate portion 164 is cooperatively connected with the limit groove 183.
In this embodiment, the first plate portion 163 and the second plate portion 164 are connected in a 7-shape, and the second plate portion 164 is cooperatively connected with the limiting groove 183, so that when the diaphragm assembly 160 moves up and down along with the two groups 170, the diaphragm extension ring 180 will not move along with the two groups, and only the second plate portion 164 and the limiting groove 183 will move relatively, so that the structural member will not be damaged.
In some embodiments, the mating length of the second plate 164 and the limiting groove 183 is greater than the maximum length of the relative movement of the main barrel 150 and the two groups 170.
In the present embodiment, the matching length of the second plate portion 164 and the limiting groove 183 is longer than the maximum length of the relative movement between the main barrel 150 and the two groups 170, so that the diaphragm extension ring 180 and the diaphragm assembly 160 can operate smoothly without affecting the focusing of the lens.
In some embodiments, a first rounded corner 162 is provided at an end of the cam plate contacting the stop groove 183, a second rounded corner 185 is provided at an end of the stop groove 183 adjacent to the ring 182, and the first rounded corner 162 mates with the second rounded corner 185.
In this embodiment, the end of the cam plate contacting the limiting groove 183 is provided with a first rounded corner 162, the end of the limiting groove 183 near the ring 182 is provided with a second rounded corner 185, and the rounded corner can prevent structural interference between the cam plate and the limiting groove 183.
In some embodiments, the lens further includes a group 140, the group 140 is connected to the end of the main barrel 150 away from the two groups 170, a second space-avoiding groove 141 is disposed on the group 140, and the rod portion 181 extends into the second space-avoiding groove 141 toward the direction of the group 140.
In this embodiment, the group 140 is provided with the second space avoiding groove 141, which can avoid the space diaphragm extending ring 180, and prevent the structural interference during focusing.
The embodiment of the invention also provides a lens, and the lens is provided with the diaphragm adjusting device of the lens.
Specifically, referring to fig. 1, the structural body of the lens includes: a fixed barrel 110, a focusing barrel 120, a CAM barrel 130, a group 140, a drive PIN210, a main barrel 150, a diaphragm assembly 160, two groups 170, a diaphragm extension ring 180, a diaphragm adjustment barrel 190, an interface 200, and a toggle 220.
Referring to fig. 2, the present embodiment can be applied to diaphragm adjustment of a large-movement-amount lens. The diaphragm assemblies 160 are assembled in the two groups 170, the levers 220 are assembled in the diaphragm adjustment cylinder 190, and the diaphragm assemblies 160 extend out of the cam plates for adjusting the size of the diaphragm apertures in the diaphragm assemblies 160. The diaphragm extension ring 180 is assembled and fixed in the main barrel 150, and the diaphragm extension ring 180 includes a rod portion 181 and a ring portion 182 connected, where the rod portion 181 passes through the first clearance groove 171 and is movably connected with the cam plate through a limit groove 183 on the rod portion 181, so that the cam plate can move along the moving direction of the two groups 170 in the limit groove 183. The cam plate comprises a first plate part 163 parallel to the two ports of the main cylinder 150 and a second plate part 164 perpendicular to the two ports of the main cylinder 150, wherein the first plate part 163 and the second plate part 164 are connected in a 7 shape, and the second plate part 164 is connected with the limit groove 183 in a matching way. The interface 200 is assembled and fixed with the main cylinder 150 by the screw 230, and can fix the positions of the diaphragm extension ring 180 and the diaphragm adjusting cylinder 190 at the same time. The limiting structure comprises a deflector rod 220, a first assembling hole 191 arranged on the diaphragm adjusting cylinder 190, a second assembling hole 184 arranged on the rod part 181, and a rotation limiting groove 154 arranged on the main cylinder 150 and extending along the circumferential direction of the main cylinder 150, wherein one end of the deflector rod 220 sequentially penetrates through the first assembling hole 191, the rotation limiting groove 154 and the second assembling hole 184, and the deflector rod 220 can move along the circumferential direction of the main cylinder 150 in the rotation limiting groove 154. By rotating the diaphragm adjusting cylinder 190, the deflector 220 drives the diaphragm extension ring 180 to adjust the aperture of the diaphragm. When the lens needs focusing, the CAM barrel 130 is driven by rotating the focusing barrel 120, and the driving PIN210 in the CAM barrel 130 drives the group 140 and the two groups 170 to focus along the respective curved grooves 131 by a large movement amount. The second plate portion 164 of the diaphragm assembly 160 always maintains a mating surface with the diaphragm extender ring 180, so that the diaphragm adjusting mechanism always operates smoothly when the lens is focused.
Referring to fig. 3, the diaphragm extension ring 180 includes a rod portion 181, a ring portion 182, and a screw 230. After the rod portion 181 is matched with the assembly counter bore 186 of the ring portion 182 on four sides, the rod portion is connected by the screw 230, so that the structure is stable. The limit groove 183 in the lever portion 181 is configured to cooperate with the second plate portion 164 of the diaphragm assembly 160, where the cooperation length is greater than the maximum movement of the linear groove 153 of the main cylinder 150 (i.e., the maximum length of the relative movement of the main cylinder 150 and the two groups 170 or 140). The second assembly hole 184 in the rod portion 181 is used to connect with the shifter 220, and the shifter 220 drives the diaphragm extender 180 to rotate along the center axis of the ring portion 182.
Referring to fig. 4, the diaphragm assembly 160 rotates the cam plate to adjust the size of the diaphragm aperture, wherein the cam plate is thicker, which makes the diaphragm assembly 160 not easy to deform when in operation, the second plate portion 164 of the cam plate can increase the moving engagement amount with the diaphragm extension ring 180, and the rounded corner at the tail end of the cam plate can prevent the rounded corner engagement interference with the limit groove 183 of the lever portion 181.
Referring to fig. 5, the two groups 170 are internally used for assembling lenses, the side walls of the two groups 170 are provided with three first positioning holes 172 distributed at 120 °, and a tap is arranged at the center of the concave hole of the first positioning hole 172, and is used for assembling the transmission PIN210. The front ends of the two groups 170 are used for assembling the diaphragm assembly 160, the empty-avoiding groove is used for preventing structural interference when the diaphragm assembly 160 is assembled, the whole circle of the matching surface between the two groups 170 and the main cylinder 150 is not reduced, the two groups 170 are prevented from being assembled and inclined, and imaging effect is facilitated.
Referring to fig. 6, a group 140 is internally used for assembling lenses, the side wall of the group 140 is provided with three second positioning holes 142 distributed at 120 °, and the center of the concave hole of the second positioning holes 142 is provided with a tapping for assembling a transmission PIN210. The rear end of the group 140 is provided with an empty-avoiding groove for avoiding structural interference during focusing by the diaphragm extension ring 180, and the whole circle of the matching surface between the group 140 and the main cylinder 150 is not reduced, so that the group 140 is prevented from being assembled and inclined, and the imaging effect is facilitated.
Referring to fig. 7, the side wall of the main barrel 150 has three linear grooves 153 distributed at 120 ° for limiting the PIN210 guide and the lens movement. The rear end of the main barrel 150 is provided with a step for assembling the engagement and limitation of the diaphragm extender ring 180 and a rotation limiting groove 154 for limiting the range of the moving angle of the lever 220, thereby controlling the maximum and minimum apertures of the diaphragm.
Referring to fig. 8, after the main cylinder 150 is assembled with the diaphragm extension ring 180, the diaphragm adjustment cylinder 190 is assembled outside the main cylinder 150, and the entire structure is connected using the lever 220. The threads of the deflector rod 220 are locked with the diaphragm adjusting cylinder 190, the outer diameter of the deflector rod 220 is matched and connected with the second assembly holes 184 on the diaphragm extension ring 180, and the diaphragm adjusting cylinder 190 can be rotated to adjust the diaphragm size after assembly is completed.
Referring to fig. 9, the interface 200 is assembled and fixed with the main barrel 150 in the lens by the screw 230, and can fix the positions of the diaphragm extension ring 180 and the diaphragm adjusting barrel 190 at the same time, and the interface 200 is in clearance fit with the diaphragm extension ring 180 and the diaphragm adjusting barrel 190, so that the diaphragm adjusting structure group operates smoothly.
Referring to fig. 10, a group 140, two groups 170, CAM barrel 130 are assembled in series with main barrel 150 via six sets of drive PINs 210. The CAM tube 130 has two sets of three curved slots 131 with the same angle of 120 ° on its side wall, and the driving PIN210 can drive the group 140 and the two groups 170 to move along the respective curved slots 131, so that the lens is focused accurately. After the assembly is completed, the CAM barrel 130 is continuously assembled with the focusing barrel 120, and then the fixing barrel 110 is assembled to fix and limit the whole focusing structure.
In the present embodiment, the diaphragm adjusting structure (the diaphragm adjusting structure includes the diaphragm extending ring 180 and the diaphragm adjusting cylinder 190) is fixed to the main cylinder 150, and does not participate in the movement of the lens focusing. Even under the condition of large movement, the smooth operation of the adjusting diaphragm structure can be always kept, the interference of the structure is avoided, and the appearance is not influenced.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims (10)

1. The utility model provides a diaphragm adjusting device of camera lens, its characterized in that, the camera lens include main section of thick bamboo and remove set up in two groups in the main section of thick bamboo, be provided with on two groups along two group circumference extension's first void groove, diaphragm adjusting device includes:
the diaphragm assembly is assembled with the two groups, and a cam plate for adjusting the size of a diaphragm hole in the diaphragm assembly extends out of the diaphragm assembly;
the diaphragm extension ring comprises a rod part and a ring part which are connected, wherein the rod part penetrates through the first clearance groove and is movably connected with the cam plate through a limiting groove on the rod part, so that the cam plate can move along the two groups of moving directions in the limiting groove; the ring part is rotatably sleeved in the main cylinder;
and the limiting structure is connected with the diaphragm extension ring and the main cylinder and used for limiting the diaphragm extension ring to move on the main cylinder along the moving directions of the two groups.
2. The diaphragm adjusting apparatus of a lens according to claim 1, wherein the ring portion is fitted inside the main cylinder, the diaphragm adjusting apparatus further comprises a diaphragm adjusting cylinder, and the diaphragm adjusting cylinder is connected to the diaphragm extension ring and fitted outside the main cylinder.
3. The diaphragm adjusting apparatus of the lens barrel according to claim 2, wherein the limiting structure comprises a deflector rod, a first assembly hole provided on the diaphragm adjusting cylinder, a second assembly hole provided on the rod portion, and a rotation limiting groove provided on the main cylinder and extending circumferentially along the main cylinder, one end of the deflector rod sequentially passes through the first assembly hole, the rotation limiting groove, and the second assembly hole, and the deflector rod is movable in the rotation limiting groove circumferentially along the main cylinder.
4. The diaphragm adjusting device of the lens according to claim 2, wherein the limiting structure further comprises an interface and a first step arranged on the inner side of the main barrel, the interface is fixedly connected with one side of the main barrel through a screw, and the diaphragm extension ring is located between the first step and the interface and is in clearance fit with the interface.
5. The diaphragm adjusting apparatus of a lens barrel according to claim 4, wherein the diaphragm adjusting cylinder is located between a second step provided on an outer side of the main cylinder and the interface and is clearance-fitted with the interface.
6. The diaphragm adjusting apparatus of a lens barrel according to claim 1, wherein the cam plate includes a first plate portion parallel to the two ports of the main barrel and a second plate portion perpendicular to the two ports of the main barrel, the first plate portion and the second plate portion being connected in a 7-shape, wherein the second plate portion is connected in cooperation with the limit groove.
7. The diaphragm adjusting apparatus of the lens system of claim 6, wherein the second plate portion and the limiting groove have a length greater than a maximum length of relative movement between the main barrel and the two groups.
8. The diaphragm adjusting device of the lens according to claim 1, wherein a first rounded corner is arranged at one end of the cam plate, which is in contact with the limiting groove, and a second rounded corner is arranged at one end of the limiting groove, which is close to the ring portion, and the first rounded corner is matched with the second rounded corner.
9. The diaphragm adjusting apparatus of claim 1, wherein the lens further comprises a group, the group is connected to an end of the main barrel away from the two groups, a second clearance groove is provided on the group, and the rod portion extends into the second clearance groove toward the direction of the group.
10. A lens, characterized in that the lens is provided with a diaphragm adjusting device of the lens according to any one of the preceding claims 1 to 9.
CN202310569464.3A 2023-05-19 2023-05-19 Diaphragm adjusting device of camera lens and camera lens Pending CN116679365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310569464.3A CN116679365A (en) 2023-05-19 2023-05-19 Diaphragm adjusting device of camera lens and camera lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310569464.3A CN116679365A (en) 2023-05-19 2023-05-19 Diaphragm adjusting device of camera lens and camera lens

Publications (1)

Publication Number Publication Date
CN116679365A true CN116679365A (en) 2023-09-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310569464.3A Pending CN116679365A (en) 2023-05-19 2023-05-19 Diaphragm adjusting device of camera lens and camera lens

Country Status (1)

Country Link
CN (1) CN116679365A (en)

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