Lens with interchangeable bayonets

Abstract

The utility model discloses a lens with an interchangeable bayonet, which comprises a lens main body and a bayonet assembly, the lens main body comprises a lens barrel and a connecting barrel which are fixed into a whole, and an axial debugging gap is arranged between the connecting barrel and the lens barrel; the bayonet assembly comprises a bayonet fixing cylinder and a bayonet; the bayonet fixing cylinder is detachably connected to one side of the connecting cylinder through a screw, the bayonet is fixedly connected with the bayonet fixing cylinder and cannot be detached, and the bayonet is used for being connected with a camera. According to the design, the rule that the bayonet is not detachable is avoided in the design of the lens bayonet, and the bayonet on the lens can be quickly replaced under the condition that the relative position of the bayonet and the lens is not changed by splitting the connection relation between the bayonet and the lens, so that the purpose of matching with different cameras for use is achieved; moreover, the pixel quality of the lens is not affected after the bayonet is replaced, and the use function of the lens is not damaged, and the compatibility problem is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical lens technical field, concretely relates to a lens with interchangeable bayonet. BACKGROUND

[0002] The bayonet of different camera brands is different in size, flange distance and electronic contact quantity, so the bayonet of different camera brands is generally not universal. In order to connect the camera and lens of different bayonet together for use, manufacturers have invented an adapter ring, which allows users to install a lens of one brand to a camera of another brand, thereby expanding the lens selection range of photography enthusiasts.

[0003] Although the adapter ring can realize the physical compatibility of different brand lenses and cameras to a certain extent, the adapter ring cannot completely eliminate the technical gap between brands, for example, there are obvious differences in automatic focusing, aperture control, image stabilization and lens correction, and the adapter ring often accompanies the compromise of these functions when in use.

[0004] The traditional lens, as shown in Figure 1 and Figure 2 , the lens barrel includes a lens main body part ① and a lens main body part ② fixed together, the bayonet ③ is locked and fixed together with the lens main body part ① using screws, when the bayonet ③ and the lens main body part ① are fixed together, the gap ④ between the bayonet ③ and the lens main body part ① is pre-adjusted, thereafter the bayonet ③ cannot be disassembled (if the bayonet ③ is forcibly disassembled and assembled together again, the gap ④ may change, which will affect the pixel quality of the lens), therefore the traditional lens does not have the ability to disassemble and replace the bayonet, and moreover the flange distance ⑤ of different bayonets from the imaging surface ⑥ is also different, which also limits the possibility of replacing the lens with different bayonets.

[0005] Therefore, how to realize the replaceable design of the bayonet on the lens to match the use of different cameras, and how to replace the bayonet hook without affecting the pixel quality of the lens, and how to avoid the problems of compromise and compatibility in the use function of the lens are the technical problems to be solved at present. CONTENT OF THE UTILITY MODEL

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the defects that the bayonet on the lens cannot be replaced and cannot match the use of different cameras in the prior art, so as to provide a lens with interchangeable bayonet.

[0007] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0008] A lens with interchangeable bayonet, comprising:

[0009] The lens body comprises a lens barrel and a connecting barrel, and an axial adjustment gap is formed between the connecting barrel and the lens barrel.

[0010] The bayonet assembly comprises a bayonet fixing barrel and a bayonet, the bayonet fixing barrel is detachably connected to one side of the connecting barrel by a screw, and the bayonet is fixedly connected to the bayonet fixing barrel and cannot be detached, and the bayonet is used to connect a camera.

[0011] Further, the bayonet assembly further comprises a sealing ring arranged between the bayonet fixing barrel and the bayonet.

[0012] Further, the screw is a cross-shaped screw exposed on the outer surface of the lens.

[0013] Further, the bayonet is any one of an E-bayonet, a Z-bayonet, an RF-bayonet, and an L-bayonet.

[0014] Further, the lens barrel is a barrel of the lens for mounting a lens, and the connecting barrel is coaxially fixed to an axial end of the lens barrel.

[0015] Further, an accommodating cavity is enclosed between the bayonet fixing barrel and the lens barrel, and the connecting barrel is located in the accommodating cavity.

[0016] Further, the lens barrel is provided with a stepped structure at an axial end close to the bayonet assembly, and the connecting barrel is fixedly connected to the stepped structure of the lens barrel; the connecting barrel comprises a connecting barrel body sleeved on the outer periphery of the central column of the lens barrel, a first connecting edge located at one end of the connecting barrel body and extending radially outward, and a second connecting edge located at the other end of the connecting barrel body and extending radially inward; the first connecting edge and the axial end surface of the lens barrel are oppositely arranged, the first connecting edge is fixed on the axial end surface of the lens barrel by a screw, and the gap between the first connecting edge and the axial end surface of the lens barrel is the axial adjustment gap; the bayonet fixing barrel is detachably connected to the second connecting edge by a screw, and the connection between the bayonet fixing barrel and the second connecting edge is rigid connection.

[0017] Further, the axial end surface of the lens barrel is provided with a limiting structure extending towards the bayonet assembly, and the limiting structure is limitedly abutted against the outer peripheral wall of the first connecting edge.

[0018] Further, the bayonet fixing barrel comprises a fixing barrel mounting portion for fixing the bayonet, and a fixing barrel extension portion extending from the fixing barrel mounting portion towards the peripheral edge of the lens body and covering the outer side of the connecting barrel.

[0019] Further, the fixed cylinder extension part is provided with a step matching surface matched with the lens cylinder body at one end of the lens cylinder body.

[0020] The technical scheme of the utility model has the following advantages: the lens cylinder body and the connecting cylinder are fixed as a whole and cannot be disassembled before the lens is delivered, and the axial adjustment gap is adjusted, when the bayonet on the lens needs to be replaced to match different cameras, only the screw between the bayonet fixing cylinder and the connecting cylinder needs to be disassembled, the bayonet on the lens can be quickly replaced, the axial adjustment gap between the bayonet and the lens main body in the traditional lens is moved to the lens cylinder body and the connecting cylinder, the bayonet assembly composed of the bayonet fixing cylinder and the bayonet is permanently fixed together and cannot be disassembled privately, the disassembly / replacement of the bayonet does not affect the adjustment effect, so that the pixel quality is not affected by the disassembly, and the use function of the lens is not damaged and the compatibility problem does not occur, and the series of lenses can also be used for different focal length lenses by replacing the bayonet. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0022] Figure 1 It is a schematic view of the bayonet structure of the traditional lens;

[0023] Figure 2 It is a schematic view of the appearance of the traditional lens;

[0024] Figure 3 It is a schematic view of the structure of the interchangeable bayonet lens in the embodiment of the utility model;

[0025] Figure 4 It is a schematic view of the appearance of the interchangeable bayonet lens in the embodiment of the utility model;

[0026] Figure 5 It is a disassembly and assembly schematic view of the lens main body and the bayonet assembly in the interchangeable bayonet lens in the embodiment of the utility model;

[0027] Figure 6 It is an assembly schematic view of the bayonet assembly in the embodiment of the utility model;

[0028] Figure 7 It is a schematic view of the structure of the bayonet fixing cylinder in the embodiment of the utility model;

[0029] Figure 8This is a schematic diagram of the bayonet structure in an embodiment of this utility model.

[0030] Explanation of reference numerals in the attached drawings: 1. Lens tube; 11. Limiting structure; 2. Connecting tube; 21. Connecting tube body; 22. First connecting edge; 23. Second connecting edge; 3. Axial adjustment gap; 4. Bayonet fixing tube; 41. Fixing tube mounting part; 42. Fixing tube extension part; 421. Step mating surface; 5. Bayonet; 6. Screw; 7. Sealing ring; 8. Flange distance; 9. Imaging surface; 10. Screw. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] like Figure 3 -8 shows an interchangeable mount lens, including a lens body and a mount assembly; the lens body includes a lens barrel 1 and a connecting barrel 2 fixed together, with an axial adjustment gap 3 between the connecting barrel 2 and the lens barrel 1; the mount assembly includes a mount fixing barrel 4 and a mount 5, the mount fixing barrel 4 is detachably connected to one side of the connecting barrel 2 by a screw 6, and the mount 5 is fixedly connected to the mount fixing barrel 4 and cannot be detached, and the mount 5 is used to connect a camera.

[0035] The interchangeable lens has the lens barrel 1 and the connecting barrel 2 fixed as a whole and not detachable before the lens is shipped, and the axial adjustment gap 3 is adjusted, when the bayonet 5 on the lens needs to be replaced to match different cameras, only the screw 6 between the bayonet fixing barrel 4 and the connecting barrel 2 needs to be disassembled, the bayonet 5 on the lens can be quickly replaced; and the axial adjustment gap 3 between the bayonet and the lens body in the traditional lens, which needs to be adjusted before shipment, is moved to between the lens barrel 1 and the connecting barrel 2, in the process of replacing the bayonet 5, the bayonet assembly composed of the bayonet fixing barrel 4 and the bayonet 5 is permanently fixed together and cannot be disassembled privately, the disassembly / replacement of the bayonet 5 will not affect the adjustment effect, so as to ensure that the pixel quality of the lens is not affected by disassembly, and there will be no loss and compatibility problems in the use function of the lens.

[0036] Specifically, the bayonet assembly further includes a sealing ring 7 arranged between the bayonet fixing barrel 4 and the bayonet 5, the sealing ring 7 can realize the tight installation of the bayonet 5 on the bayonet fixing barrel 4, and ensure the accuracy of the installation position of the bayonet 5. The bayonet assembly composed of the bayonet fixing barrel 4, the sealing ring 7 and the bayonet 5 cannot be disassembled after assembly, replaces the original bayonet 5, and does not need to be disassembled when the bayonet 5 is replaced subsequently. The screw 6 is one or more cross screws exposed on the outer surface of the lens; the user can directly disassemble one or more cross screws, so as to replace the entire bayonet assembly and achieve the purpose of replacing the bayonet.

[0037] Because the sizes of the bayonets of different camera brands are different, and the flange distances 8 of the bayonets 5 from the imaging surface 9 are also different; in order to make the interchangeable lens in the application can be matched with different camera brands, the lens is provided with four different bayonets 5 and corresponding bayonet fixing barrels 4, the four bayonets 5 are E bayonet, Z bayonet, RF bayonet and L bayonet, so as to ensure that the lens after installing the corresponding bayonet 5 meets the flange distance 8 of the corresponding camera. Moreover, the bayonet assembly of the series of lenses is commonly designed in different focal lengths (15mm / 24mm / 35mm / 50mm / 75mm), and can be interchangeable on lenses of different focal lengths, so as to expand the use range of users.

[0038] In some embodiments, the lens barrel 1 is a barrel for mounting a lens, and the lens barrel 1 is provided with a stepped structure at an axial end close to the bayonet assembly. The connecting barrel 2 is coaxially fixed at the stepped structure of the lens barrel 1. The connecting barrel 2 includes a connecting barrel body 21 sleeved on the outer periphery of the central column of the lens barrel 1, a first connecting edge 22 extending radially outward at one end of the connecting barrel body 21, and a second connecting edge 23 extending radially inward at the other end of the connecting barrel body 21. The first connecting edge 22 is oppositely arranged with the axial end surface of the lens barrel 1, and the gap between the first connecting edge 22 and the axial end surface of the lens barrel 1 is an axial adjustment gap 3. A plurality of spacers (not shown in the figure) are arranged at the axial adjustment gap 3, and the connecting barrel 2 is fixed on the axial end surface of the lens barrel 1 by a screw 10 passing through the connecting barrel 2 and the spacers. The bayonet fixing barrel 4 is detachably connected to the second connecting edge 23 by a screw 6, and the connection between the bayonet fixing barrel 4 and the second connecting edge 23 is a rigid connection. When assembling the lens barrel 1 and the connecting barrel 2 before the lens is shipped, the number and thickness of the spacers and the locking force of the screw 10 can be adjusted to accurately control the axial adjustment gap 3, so as to ensure that the pixel quality of the lens is not affected by the disassembly of the bayonet assembly.

[0039] Further, the bayonet fixing barrel 4 and the axial end of the lens barrel 1 enclose an accommodation cavity, and the connecting barrel 2 is located in the accommodation cavity. In this way, the connecting barrel 2, the screw 10, and the spacers can be designed in a concealed manner, preventing external moisture, dust, and the like from entering the accommodation cavity and affecting the locking effect of the screw 10 and the spacers. For example, the elasticity of the spacers may change slightly after being affected by air and moisture for a long time, which may cause the screw 10 to loosen slightly, thereby changing the axial adjustment gap 3 and affecting the imaging quality of the lens. The concealed design of the connecting barrel 2, the screw 10, and the spacers can delay the occurrence of this phenomenon as much as possible.

[0040] In some embodiments, the axial end surface of the lens barrel 1 is provided with a limiting structure 11 extending towards the bayonet assembly, and the limiting structure 11 is limited by the outer peripheral wall of the first connecting edge 22. The limiting structure 11 on the lens barrel 1 can further prevent the connecting barrel 2 from loosening.

[0041] In some embodiments, the bayonet fixing barrel 4 includes a fixing barrel mounting portion 41 for fixing the bayonet 5, and a fixing barrel extension portion 42 extending from the fixing barrel mounting portion 41 towards the outer peripheral edge of the lens barrel 1 and covering the outer side of the connecting barrel 2. One end of the fixing barrel extension portion 42 towards the lens barrel 1 is provided with a stepped matching surface 421 matched with the lens body. In this way, the sealing effect of the accommodation cavity can be further improved.

[0042] In conclusion, the interchangeable lens of the utility model embodiment avoids the rule that the lens mount cannot be disassembled, through splitting the connection relationship between the lens mount and the lens main body, under the condition that the relative position between the lens mount and the lens main body is unchanged, the interchangeable design of the lens mount on the lens is realized, and after replacing the lens mount, the pixel quality of the lens is not affected, there is no function loss and compatibility problem, and the structure is simple, the cost is low, and the feasibility is high; in addition, the split parts such as the lens mount are commonly designed, can be interchanged on lenses of different focal length specifications, so that the lens mount replacement of the series of lenses is realized.

[0043] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model creation.

Claims

1. A lens with interchangeable mounts, characterized in that, The utility model relates to a lens barrel, comprising: a lens barrel body including a lens barrel body (1) and a connecting barrel (2) fixed as a whole, the connecting barrel (2) and the lens barrel body (1) have an axial adjustment gap (3) therebetween; a bayonet assembly including a bayonet fixing barrel (4) and a bayonet (5), the bayonet fixing barrel (4) is detachably connected to one side of the connecting barrel (2) by a screw (6), the bayonet (5) is fixedly connected to the bayonet fixing barrel (4) and cannot be detached, and the bayonet (5) is used for connecting a camera.

2. The interchangeable bayonet lens of claim 1, wherein, The bayonet assembly further includes a sealing ring (7) arranged between the bayonet fixing barrel (4) and the bayonet (5).

3. The interchangeable bayonet lens of claim 1, wherein, The screw (6) is a cross-shaped screw exposed to the outer surface of the lens.

4. The interchangeable bayonet lens of claim 1, wherein, The bayonet (5) is any one of an E bayonet, a Z bayonet, an RF bayonet and an L bayonet.

5. The interchangeable bayonet lens of claim 1, wherein, The lens barrel body (1) is a barrel body for mounting a lens, and the connecting barrel (2) is coaxially fixed to an axial end of the lens barrel body (1).

6. The interchangeable bayonet lens of claim 5, wherein, The bayonet fixing barrel (4) and the lens barrel body (1) enclose a containing cavity therebetween, and the connecting barrel (2) is located in the containing cavity.

7. The interchangeable bayonet lens of claim 6, wherein, The lens barrel body (1) is provided with a stepped structure at an axial end close to the bayonet assembly, and the connecting barrel (2) is fixedly connected to the stepped structure of the lens barrel body (1); the connecting barrel (2) includes a connecting barrel main body (21) sleeved around the outer periphery of the central column of the lens barrel body (1), a first connecting edge (22) located at one end of the connecting barrel main body (21) and extending radially outward, and a second connecting edge (23) located at the other end of the connecting barrel main body (21) and extending radially inward; the first connecting edge (22) and the axial end surface of the lens barrel body (1) are oppositely arranged, the first connecting edge (22) is fixed to the axial end surface of the lens barrel body (1) by a screw (10), and the gap between the first connecting edge (22) and the axial end surface of the lens barrel body (1) is the axial adjustment gap (3); the bayonet fixing barrel (4) is detachably connected to the second connecting edge (23) by a screw (6), and the connection between the bayonet fixing barrel (4) and the second connecting edge (23) is rigid connection.

8. The interchangeable bayonet lens of claim 7, wherein, The axial end surface of the lens barrel body (1) is provided with a limiting structure (11) extending toward the bayonet assembly, and the limiting structure (11) is limitedly abutted against the outer peripheral wall of the first connecting edge (22).

9. The interchangeable bayonet lens of claim 6, wherein, The bayonet fixing barrel (4) includes a fixing barrel mounting portion (41) for fixing the bayonet (5), and a fixing barrel extension portion (42) extending from the fixing barrel mounting portion (41) toward the peripheral edge of the lens barrel body and covering the outer side of the connecting barrel (2).

10. The interchangeable bayonet lens of claim 9, wherein, One end of the fixing barrel extension portion (42) toward the lens barrel body (1) is provided with a stepped matching surface (421) matched with the lens barrel body (1).

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