Lens with interchangeable mount

Abstract

Provided is a lens with a replaceable mount. 【Solution means】The lens includes a lens body and a mount assembly. The lens body includes a lens barrel 1 and a connection cylinder 2 that are integrally fixed. There is an axial debugging gap 3 between the connection cylinder and the lens barrel. The mount assembly includes a mount fixing cylinder 4 and a mount 5. The mount fixing cylinder is removably connected to one side of the connection cylinder via a screw 6. The mount and the mount fixing cylinder are fixedly connected and non-removable. The mount is used to connect to a camera. By avoiding the rule that the mount is non-removable in the design of the lens mount and splitting the connection relationship between the mount and the lens, it is possible to achieve a quick replacement of the mount while ensuring that the relative positions of the mount and the lens itself do not change.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, and specifically to lenses with interchangeable mounts.

Background Art

[0002] Mounts of different camera brands differ in designs such as size, flange distance, and number of electrical contacts. Therefore, generally, mounts of different camera brands are not interchangeable. To enable the connection and use of cameras and lenses with different mounts, manufacturers have devised adaptors. Adaptors allow users to attach a lens of one brand to a camera of another brand, thereby expanding the lens selection range for photographers.

[0003] Although adaptors can achieve a certain degree of physical compatibility between different brand lenses and cameras, adaptors cannot completely eliminate the technical gaps between brands in aspects such as autofocus, aperture control, shake correction, and lens correction. These functions are often restricted when using adaptors.

[0004] As shown in FIGS. 1 and 2, in conventional lenses, the lens barrel includes a lens body part (1) and a lens body part (2) that are integrally fixed. The mount (3) is locked and fixed to the lens body part (1) using a male screw. When the mount (3) and the lens body part (1) are integrally fixed, the gap (4) between the mount (3) and the lens body part (1) is pre-debugged. After that, the mount (3) is non-removable (if the mount (3) is forcibly removed and then assembled, the gap (4) may change, affecting the pixel quality of the lens). Therefore, conventional lenses do not have the ability to remove and replace the mount, and the flange distances (5) at which different mounts are away from the imaging surface (6) also differ, which also limits the possibility of the lens replacing different mounts.

[0005] Therefore, how to achieve a replaceable mount design for a lens so that it matches the use of different cameras, and the replacement of the mount hook does not affect the pixel quality of the lens, and there are no problems of damage and compatibility in the use function of the lens is a technical problem to be solved currently.

Summary of the Invention

Problems to be Solved by the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the mount in the lens cannot be replaced and cannot match the use of different cameras in the prior art, and thereby provide a lens with a replaceable mount.

Means for Solving the Problems

[0007] In order to solve the above technical problems, the technical solution of the present invention is as follows. A lens with a replaceable mount comprises a lens body including a lens barrel and a connection cylinder fixed integrally, and there is an axial debugging gap between the connection cylinder and the lens barrel, and the lens body, a mount assembly including a mount fixing cylinder and a mount, the mount fixing cylinder is removably connected to one side of the connection cylinder through a screw, the mount and the mount fixing cylinder are fixedly connected and non-removable, and the mount is a mount assembly used for connecting to a camera.

[0008] Furthermore, the mount assembly further includes a sealing ring laid between the mount fixing cylinder and the mount.

[0009] Furthermore, the screw is a cross-slot screw exposed on the outer surface of the lens.

[0010] Furthermore, the mount is any one of an E mount, a Z mount, an RF mount, and an L mount.

[0011] Furthermore, the lens barrel is a barrel for attaching lens elements in the lens, and the connecting cylinder is coaxially fixed to the axial end of the lens barrel.

[0012] Furthermore, an accommodation chamber is surrounded between the mount fixing cylinder and the lens barrel, and the connecting cylinder is located in the accommodation chamber.

[0013] Furthermore, a step structure is provided at the axial end of the lens barrel close to the mount assembly. The connecting cylinder is fixedly connected to the step structure of the lens barrel. The connecting cylinder includes a connecting cylinder body fitted around the central column of the lens barrel, a first connecting side located at one end of the connecting cylinder body and extending radially outward, and a second connecting side located at the other end of the connecting cylinder body and extending radially inward. The first connecting side is provided opposite to the axial end face of the lens barrel. The first connecting side is fixed to the axial end face of the lens barrel via a male screw. The gap between the first connecting side and the axial end face of the lens barrel is the axial debugging gap. The mount fixing cylinder is removably connected to the second connecting side via a screw, and the connection between the mount fixing cylinder and the second connecting side is a rigid connection.

[0014] Furthermore, a stopper structure extending in the direction of the mount assembly is provided on the axial end face of the lens barrel. The stopper structure is stopper-abutted against the outer peripheral wall of the first connecting side.

[0015] Furthermore, the mount fixing cylinder includes a fixing cylinder mounting portion for fixing the mount, and a fixing cylinder extending portion extending from the fixing cylinder mounting portion in the direction of the outer peripheral edge of the lens body and covering the outside of the connecting cylinder.

[0016] Furthermore, a step engaging surface engaged with the lens barrel is provided at one end of the fixing cylinder extending portion facing the lens barrel.

Advantages of the Invention

[0017] The technical solution of this invention has the following advantages: Before the lens is shipped, the lens barrel and the connecting cylinder are integrally fixed and cannot be removed, and the axial debugging gap is debugged. When it is necessary to replace the mount in the lens to match different cameras, it is only necessary to remove the screw that locks between the mount fixing cylinder and the connecting cylinder, which can realize the quick replacement of the mount in the lens. Moreover, the axial debugging gap between the mount and the lens body that needs to be debugged before shipment in the conventional lens is advanced between the lens barrel and the connecting cylinder. During the process of replacing the mount, the mount assembly composed of the mount fixing cylinder and the mount is permanently fixed and cannot be privately removed. The removal / replacement of the mount does not affect the debugging effect, thereby ensuring that the pixel image quality is not affected by the removal, and there are no problems of loss of the lens's usage function and compatibility issues. Also, this series of lenses can realize the use of different focal length lenses by replacing the mount.

Brief Description of the Drawings

[0018] To more clearly explain the specific embodiments of this invention or the technical solutions in the prior art, the following briefly introduces the drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are only a part of the embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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Modes for Carrying Out the Invention

[0019] Hereinafter, with reference to the drawings, the technical solution of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present invention.

[0020] In the description of the present invention, still, the directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are for explaining the present invention and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific direction and must be constructed and operated in a specific direction. Therefore, it cannot be understood as a limitation of the present invention. Furthermore, the terms "first", "second", and "third" are only used for the purpose of description and should not be understood as indicating or implying relative importance.

[0021] In the description of the present invention, still, unless otherwise specifically stated and limited, the terms "mounting", "connecting", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection or an integral connection, a mechanical connection, or an electrical connection, a direct connection, or an indirect connection through an intermediary, or a communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] The lens with a replaceable mount as shown in FIGS. 3 to 8 includes a lens body and a mount assembly. The lens body includes a lens barrel 1 and a connecting cylinder 2 that are integrally fixed. There is an axial debugging gap 3 between the connecting cylinder 2 and the lens barrel 1. The mount assembly includes a mount fixing cylinder 4 and a mount 5. The mount fixing cylinder 4 is removably connected to one side of the connecting cylinder 2 via a screw 6. The mount 5 and the mount fixing cylinder 4 are fixedly connected and non-removable. The mount 5 is used to connect to a camera.

[0023] For such a lens with a replaceable mount, before shipping the lens, the lens barrel 1 and the connecting cylinder 2 need to be integrally fixed and made non-removable, and the axial debugging gap 3 needs to be debugged. When it is necessary to replace the mount 5 in the lens to match different cameras, it is only necessary to remove the screw 6 that locks between the mount fixing cylinder 4 and the connecting cylinder 2, which can realize the rapid replacement of the mount 5 in the lens. Also, the axial debugging gap 3 between the mount and the lens body that needs to be debugged before shipping in the conventional lens is advanced between the lens barrel 1 and the connecting cylinder 2. During the process of replacing the mount 5, the mount assembly composed of the mount fixing cylinder 4 and the mount 5 is permanently fixed and cannot be privately removed. The removal / replacement of the mount 5 does not affect the debugging effect, thereby ensuring that the pixel image quality of the lens is not affected by the removal, and no loss of use function and compatibility problems occur in the lens.

[0024] Specifically, the mount assembly further includes a sealing ring 7 laid with a seal between the mount fixing cylinder 4 and the mount 5. Due to the arrangement of the sealing ring 7, it can be realized that the mount 5 is tightly attached to the mount fixing cylinder 4, ensuring the accuracy of the mounting position of the mount 5. The mount assembly composed of the mount fixing cylinder 4, the sealing ring 7, and the mount 5 cannot be disassembled after being assembled, replacing the conventional mount 5 and eliminating the need to disassemble and remove the mount 5 when replacing the mount 5 subsequently. The screw 6 is specifically one or more cross-recessed screws exposed on the outer surface of the lens. The user can directly remove one or more cross-recessed screws, thereby replacing the entire mount assembly and achieving the purpose of replacing the mount.

[0025] The sizes of mounts of different camera brands are different, and the flange distances 8 from the mount 5 to the imaging surface 9 are also different. In order for the interchangeable lens in the present application to be used in accordance with different camera brands, four different mounts 5 and corresponding mount fixing cylinders 4 are arranged on the lens. The four mounts 5 are E mount, Z mount, RF mount, and L mount respectively, ensuring that the lens after attaching the corresponding mount 5 matches the flange distance 8 of the corresponding camera. And for this series of lenses in different focal lengths (15mm / 24mm / 35mm / 50mm / 75mm), the mount assembly is commonly designed and can be replaced with lenses of different focal length specifications, thereby expanding the user's usage range.

[0026] In some embodiments, the lens barrel 1 is a cylindrical body for attaching lens elements in a lens, a stepped structure is provided at an axial end close to the mount assembly of the lens barrel 1, and the connection cylinder 2 is coaxially fixed to the stepped structure of the lens barrel 1. The connection cylinder 2 includes a connection cylinder main body 21 fitted on the outer peripheral edge of the central column of the lens barrel 1, a first connection side 22 located at one end of the connection cylinder main body 21 and extending radially outward, and a second connection side 23 located at the other end of the connection cylinder main body 21 and extending radially inward. The first connection side 22 is provided facing the axial end face of the lens barrel 1, the gap between the first connection side 22 and the axial end face of the lens barrel 1 is the axial debugging gap 3, a plurality of gaskets (not shown) are laid in the axial debugging gap 3, and the connection cylinder 2 is fixed to the axial end face of the lens barrel 1 through a male screw 10 passing through itself and the plurality of gaskets. The mount fixing cylinder 4 is removably connected to the second connection side 23 through a screw 6, and the connection between the mount fixing cylinder 4 and the second connection side 23 is a rigid connection. When assembling the lens barrel 1 and the connection cylinder 2 before shipping the lens, by debugging the number and thickness of the gaskets and the locking force of the male screw 10, accurate control of the axial debugging gap 3 can be realized, ensuring that the pixel image quality of the lens is not affected by the removal of the mount assembly.

[0027] Furthermore, an accommodation chamber is surrounded between the mount fixing cylinder 4 and the axial end of the lens barrel 1, and the connection cylinder 2 is located in the accommodation chamber. Installing in this way can realize a built-in design of the connection cylinder 2, the male screw 10 and the gasket, preventing external moisture, dust, etc. from entering the accommodation chamber and affecting the locking effect of the male screw 10 and the gasket. For example, due to the influence of air and moisture over a long time, the elasticity of the gasket undergoes a slight change, such a slight change causes a slight loosening in the locking of the male screw 10, further changing the axial debugging gap 3 and affecting the imaging quality of the lens. The built-in design of the connection cylinder 2, the male screw 10 and the gasket can delay the occurrence of this phenomenon as much as possible.

[0028] In some embodiments, a stopper structure 11 extending in the direction of the mount assembly is provided on the axial end face of the lens barrel 1, and the stopper structure 11 is stopper-abutted against the outer peripheral wall of the first connection side 22. By providing the stopper structure 11 on the lens barrel 1, displacement of the connection cylinder 2 can be further prevented.

[0029] In some embodiments, the mount fixing cylinder 4 includes a fixing cylinder mounting portion 41 for fixing the mount 5, and a fixing cylinder extending portion 42 extending from the fixing cylinder mounting portion 41 in the direction of the outer peripheral edge of the lens barrel 1 and covering the outside of the connection cylinder 2. A stepped engagement surface 421 engaged with the lens body is provided at one end of the fixing cylinder extending portion 42 facing the lens barrel 1. Installed in this way, the sealing effect of the accommodation chamber can be further improved.

[0030] As described above, the lens with a replaceable mount provided by the embodiments of the present invention avoids the rule that the mount is non-removable in the design of the lens mount, and by dividing the connection relationship between the mount and the lens body, when ensuring that the relative positions of the mount and the lens body itself remain unchanged, a replaceable design of the mount in the lens is realized, and after replacing the mount, the quality of the lens pixels is not affected, no functional degradation and compatibility problems occur, the structure is simple, the cost is low, the feasibility is high, and the divided parts such as the mount are commonly designed and can be replaced with lenses of different focal length specifications, thereby realizing the mount replacement of this series of lenses.

[0031] Obviously, the above embodiments are merely illustrative for clear explanation and do not limit the embodiments. A person skilled in the art can make other different forms of changes or variations based on the above description. Here, it is not necessary to cover all embodiments, nor can all embodiments be covered. The obvious changes or variations derived from these are still within the protection scope created by the present invention.

Explanation of Reference Numerals

[0032] 1... Lens barrel 11… Stopper structure 2… Connection cylinder 21… Connection cylinder body 22… First connection side 23… Second connection side 3… Axial debugging gap 4… Mounting fixing cylinder 41… Fixing cylinder mounting part 42… Fixing cylinder extending part 421… Step engagement surface 5… Mount 6… Screw 7… Seal ring 8… Flange distance 9… Imaging surface 10… Male screw

Claims

1. A lens body including an integrally fixed lens barrel (1) and a connecting cylinder (2), and having an axial debugging gap (3) between the connecting cylinder (2) and the lens barrel (1); A mount assembly including a mount fixing cylinder (4) and a mount (5), wherein the mount fixing cylinder (4) is removably connected to one side of the connecting cylinder (2) via a screw (6), the mount (5) and the mount fixing cylinder (4) are fixedly connected and non-removable, and the mount (5) is a mount assembly used for connecting to a camera. A lens with a replaceable mount, characterized by comprising the above.

2. The mount assembly further includes a sealing ring (7) laid between the mount fixing cylinder (4) and the mount (5) with a seal. A lens with a replaceable mount according to Claim 1, characterized by comprising the above.

3. The screw (6) is a screw with a cross hole exposed on the outer surface of the lens. A lens with a replaceable mount according to Claim 1, characterized by comprising the above.

4. The mount (5) is any one of an E mount, a Z mount, an RF mount, and an L mount. A lens with a replaceable mount according to Claim 1, characterized by comprising the above.

5. The lens barrel (1) is a barrel for mounting lens elements in the lens, and the connecting cylinder (2) is coaxially fixed to the axial end of the lens barrel (1). A lens with a replaceable mount according to Claim 1, characterized by comprising the above.

6. An accommodation chamber is surrounded between the mount fixing cylinder (4) and the lens barrel (1), and the connecting cylinder (2) is located in the accommodation chamber. A lens with a replaceable mount according to Claim 5, characterized by comprising the above.

7. A step structure is provided at an axial end of the lens barrel (1) close to the mount assembly. The connection cylinder (2) is fixedly connected to the step structure of the lens barrel (1). The connection cylinder (2) includes a connection cylinder body (21) fitted around the central column of the lens barrel (1), a first connection side (22) located at one end of the connection cylinder body (21) and extending radially outward, and a second connection side (23) located at the other end of the connection cylinder body (21) and extending radially inward. The first connection side (22) is provided opposite to the axial end face of the lens barrel (1), and the first connection side (22) is fixed to the axial end face of the lens barrel (1) via a male screw (10). The gap between the first connection side (22) and the axial end face of the lens barrel (1) is the axial debugging gap (3). The mount fixing cylinder (4) is removably connected to the second connection side (23) via the screw (6), and the connection between the fixing cylinder of the mount (5) and the second connection side (23) is a rigid connection. A lens with an exchangeable mount according to claim 6, characterized in that.

8. A stopper structure (11) extending in the direction of the mount assembly is provided on the axial end face of the lens barrel (1). The stopper structure (11) is stopper-abutted against the outer peripheral wall of the first connection side (22). A lens with an exchangeable mount according to claim 7, characterized in that.

9. The mount fixing cylinder (4) includes a fixing cylinder mounting portion (41) for fixing the mount (5), and a fixing cylinder extending portion (42) extending from the fixing cylinder mounting portion (41) in the direction of the outer peripheral edge of the lens body and covering the outside of the connection cylinder (2). A lens with an exchangeable mount according to claim 6, characterized in that.

10. A stepped engagement surface (421) engaged with the lens barrel (1) is provided at one end of the fixing cylinder extending portion (42) facing the lens barrel (1). A lens with an exchangeable mount according to claim 9, characterized in that.

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