Lens barrel and lens assembly

Abstract

The present invention discloses a lens barrel and a lens assembly. Among them, the lens barrel includes a body and a first connection end provided at one end of the body. The body is formed with a through hole that penetrates the first connection end; the first connection end is provided with an annular groove on its end face, and the annular groove extends along the axial direction of the through hole. The lens barrel of the technical solution of the present invention can achieve an elastic fit connection with the lens mount, so as to solve the adaptation problem and the focusing problem.

Description

Technical Field

[0001] The present invention relates to the technical field of lenses, and particularly to a lens barrel and a lens assembly. Background Art

[0002] In existing cameras, for plastic lenses, due to a considerable number of errors in plastic raw materials and molding conditions, the actual finished product sizes of the lens body and the lens mount have large errors and are difficult to match. For metal lenses, whether by extrusion molding or metallurgical injection molding, some treatments need to be done on the appearance after the metal parts are molded, resulting in problems with torque adaptation during assembly. Therefore, when the lens and the lens mount are always loosely fitted, focusing problems occur, and when they are interference-fitted, the processing dimensions will cause adaptation problems. Summary of the Invention

[0003] The main object of the present invention is to propose a lens barrel, aiming to solve the adaptation problem and the focusing problem between the lens barrel and the lens mount.

[0004] To achieve the above object, the lens barrel proposed by the present invention includes a body and a first connection end provided at one end of the body. The body is formed with a through hole that penetrates the first connection end. The first connection end is provided with an annular groove on its end face, and the annular groove extends along the axial direction of the through hole.

[0005] In an optional embodiment, in the direction from the body to the end face of the first connection end, the opening ring width of the annular groove gradually increases.

[0006] In an optional embodiment, a cut is provided on the outer peripheral surface of the first connection end and communicates with the annular groove. The cut extends along the axis direction of the through hole and penetrates the end face of the first connection end.

[0007] In an optional embodiment, there are a plurality of the cuts, and the plurality of cuts are evenly arranged along the circumferential direction of the first connection end.

[0008] In an optional embodiment, the side wall surface of the cut away from the end face of the first connection end is flush with the bottom wall surface of the annular groove.

[0009] In an optional embodiment, an external thread is provided on the outer peripheral surface of the first connection end.

[0010] In an optional embodiment, in the axial direction of the through hole, the depth of the groove is greater than the length of the external thread.

[0011] In an optional embodiment, a holding portion is convexly provided on the circumferential surface of the first connection end. The holding portion is away from the body and is evenly distributed along the circumferential direction of the first connection end.

[0012] In an alternative embodiment, a guiding inclined surface is provided at one end of the abutting portion facing away from the body.

[0013] The present invention also provides a lens assembly, including a lens and a lens mount. The lens mount is formed with a mounting cavity. The lens includes the lens barrel as described above, and the first connection end of the lens barrel is mounted in the mounting cavity.

[0014] In the lens barrel of the technical solution of the present invention, an annular groove is provided on the end face of the first connection end. The annular groove extends along the axial direction of the through hole, so that there is an annular gap between the outer peripheral surface of the first connection end and the inner wall surface of the through hole, enabling the outer peripheral wall of the first connection end to have an elastic deformation space facing the through hole. On the one hand, when there is an interference fit between the size of the first connection end and the lens mount, the deformation of the first connection end facilitates the assembly and disassembly of the lens barrel and the lens mount, solves the problem of the fit between the lens mount and the lens barrel, and at the same time achieves the effect of stable fixation. On the other hand, when there is no interference fit between the first connection end and the lens mount, when the lens barrel is displaced due to an external force, it can also be reset by the elastic force of the second connection portion, without causing the problem of focus misalignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the lens barrel of the present invention;

[0017] Figure 2 For Figure 1 It is a schematic structural diagram of the lens barrel shown from another perspective;

[0018] Figure 3 It is a schematic structural diagram of another embodiment of the lens barrel of the present invention;

[0019] Figure 4 For Figure 3 It is a schematic structural diagram of the lens barrel shown from another perspective;

[0020] Figure 5 For Figure 3 It is a schematic structural diagram of the lens barrel shown from yet another perspective;

[0021] Figure 6 It is a schematic structural diagram of an embodiment of the lens assembly of the present invention;

[0022] Figure 7 For Figure 6Exploded view of the lens assembly shown

[0023] Figure 8 Exploded view of another embodiment of the lens assembly of the present invention

[0024] Explanation of the reference numerals in the drawings

[0025] Reference numeral Name Reference numeral Name 100 Lens assembly 137 Abutting portion 10 Lens barrel 1371 Guide inclined surface 11 Body 15 Second connection end 111 Through hole 30 Lens mount 13 First connection end 30a Installation cavity 131 Annular groove 31 Base 133 Notch 33 Connection portion 135 External thread

[0026] The realization of the object of the present invention, its functional features and advantages will be further described with reference to the embodiments and the accompanying drawings Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0028] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly

[0029] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances

[0030] In addition, in the present invention, the descriptions such as "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention

[0031] There is a common problem of torque adaptation between the lens and the lens holder in existing security monitors, mobile phone cameras, laptop cameras or tablet computers. For example, whether the lens and the lens holder are threaded or directly interference fit with the inner wall of the lens holder, there is a problem of too tight or loose connection between the lens and the lens holder, which affects the product yield.

[0032] Based on the above problems, the inventors have considered that the key to achieving torque adaptation between the lens and the lens mount is to achieve a suitable connection effect of "neither tight nor loose" between the lens and the lens mount. As long as the connection between the lens mount and the lens is set to have a certain degree of elasticity, on the one hand, the lens mount and the lens can be elastically deformed when there is an interference fit, thereby facilitating assembly and disassembly, solving the problem of "too tight" connection between the lens and the lens mount, and at the same time improving the connection stability. On the other hand, when the lens is offset due to external force, since the connection between the lens mount or the lens has a certain degree of elasticity, the lens will also be reset due to the elastic force, and the problem of lens focus misalignment will not be caused.

[0033] Guided by the above considerations, the inventors conceived that an annular groove is formed on the end surface of the first connecting end of the lens barrel, so that a gap is generated between the outer peripheral wall of the first connecting end and the inner wall of the through hole, thereby enabling the first connecting end to produce elastic deformation. In this way, when the first connecting end is connected to the lens mount, the focusing problem of the lens and the lens mount being too tight or loose can be solved.

[0034] The following embodiments are all based on the above considerations.

[0035] Please refer to Figures 1 to 2 The present invention proposes a lens barrel 10 for mounting a camera lens and connected to a lens mount 30. The lens barrel 10 includes a body 11 and a first connecting end 13 provided at one end of the body 11. The body 11 is formed with a through hole 111, and the through hole 111 passes through the first connecting end 13. The first connecting end 13 is provided with an annular groove 131 on its end surface, and the annular groove 131 extends along the axial direction of the through hole 111.

[0036] In this embodiment, after the camera lens barrel 10 is installed with camera lenses, a lens for photography is formed. After the lens is fixed to the lens mount 30, it is installed on a certain device, serving as the camera of the device. Here, the material of the lens barrel 10 can be metal or plastic. A through hole 111 is formed in the body 11 of the lens barrel 10 for installing lenses to achieve the transmission of light. It can be understood that the shape of the body 11 is a cylinder, and the opening shape of the through hole 111 is circular, making the body 11 in a cylindrical shape, which is convenient for processing and preparation. The lens barrel 10 further includes a first connection end 13 for connecting with the lens mount 30 to fix the lens. Here, the first connection end 13 and the body 11 are an integrally formed structure, which can strengthen the structural strength of the lens barrel 10 itself, that is, the first connection end 13 extends from one end of the body 11, and the through hole 111 penetrates through the first connection end 13. Then, the first connection end 13 and the body 11 together form a cylindrical structure. The outer diameter of the first connection end 13 can be the same as the outer diameter of the body 11, or the outer diameter of the body 11 is slightly larger than the outer diameter of the first connection end 13, which is convenient for manual assembly. Of course, the lens barrel 10 further includes a second connection end 15. The second connection end 15 is provided at the other end of the body 11 away from the first connection end 13. An external thread 135 is provided on the outer peripheral edge of the second connection end 15, which can be used to connect a lens cap to protect the lens of the lens. Of course, the external thread 135 may not be provided on the second connection end 15, and it can be connected to the lens cap by means of plugging, clamping, etc.

[0037] An annular groove 131 is formed on the end face of the first connection end 13. This end face is the end face away from the body 11 and has a circular shape. The annular groove 131 is recessed from this end face towards the body 11. One side wall of the annular groove 131 is the inner side wall, and the other side wall is the outer side wall. The inner side wall encloses to form the through hole 111, and the annular structure formed by the cooperation of the outer side wall and the outer peripheral wall of the first connection end 13 can undergo elastic deformation. The diameter of the inner side wall and the diameter of the outer side wall of the annular groove 131 can be set according to the outer diameter of the first connection end 13 and the diameter of the through hole 111, and the depth of the annular groove 131 in the axial direction of the through hole 111 is also set according to actual needs, as long as it is ensured that the first connection end 13 can undergo elastic deformation.

[0038] In the lens barrel 10 of the technical solution of the present invention, an annular groove 131 is provided on the end face of the first connection end 13, and the annular groove 131 extends along the axial direction of the through hole 111, so that there is a gap between the outer peripheral surface of the first connection end 13 and the inner wall surface of the through hole 111, enabling the outer peripheral wall of the first connection end 13 to have an elastic deformation space towards the through hole 111. On the one hand, when the sizes of the first connection end 13 and the lens mount 30 are in interference fit, the deformation of the first connection end 13 facilitates the assembly and disassembly of the lens barrel 10 and the lens mount 30, solves the problem of the adaptation between the lens mount 30 and the lens barrel 10, and at the same time can achieve the effect of stable fixation. On the other hand, when the first connection end 13 and the lens mount 30 are not in interference connection, when the lens barrel 10 is offset due to external force, it can also be reset by the elastic force of the second connection part 33, without causing the problem of focus misalignment.

[0039] Please refer to Figure 2 and Figure 3 , in an optional embodiment, in the direction from the body 11 to the end face of the first connection end 13, the opening ring width B of the annular groove 131 gradually increases.

[0040] In this embodiment, a radial line is made on the end face of the first connection end 13, and the width of the radial line between the inner side wall and the outer side wall of the annular groove 131 is the opening ring width B of the annular groove 131. When the size of the ring width B gradually increases in the direction from the body 11 to the end face of the first connection end 13, the gap near the end face of the first connection end 13 can be increased, and further, the outer peripheral wall near the end face of the first connection end 13 can have more deformation space, thereby increasing the elastic deformation amount. Even if there are machining errors during machining, they can be compensated by elastic deformation, further solving the adaptation problem and making it more convenient for the assembly of the lens barrel 10 and the lens mount 30.

[0041] Please refer to Figure 3 and Figure 4 , in order to further strengthen the elastic effect of the first connection end 13, in an optional embodiment, a notch 133 communicating with the annular groove 131 is provided on the outer peripheral surface of the first connection end 13, and the notch 133 extends along the axial direction of the through hole 111 and penetrates the end face of the first connection end 13.

[0042] In this embodiment, a notch 133 is formed on the outer peripheral surface of the first connection end 13, that is, the first connection end 13 is not continuous in the circumferential direction. When the notch 133 communicates with the annular groove 131 and penetrates the end face of the first connection end 13, the outer peripheral wall of the first connection end 13 can be divided, that is, the outer side wall of the annular groove 131 is divided, so that the structural freedom degree formed by the outer side wall of the annular groove 131 and the outer peripheral wall of the first connection end 13 is further increased, and the elastic deformation amount can be further improved. Here, the width of the notch 133 in the circumferential direction of the first connection end 13 and the length in the axial direction of the through hole 111 can be set according to actual needs to ensure the elastic deformation of the arc-shaped plate formed by the outer peripheral wall of the first connection end 13 and the outer side wall of the annular groove 131, so as to avoid the problem of torque adaptation.

[0043] Please refer to Figures 3 to 5 , in an alternative embodiment, a plurality of notches 133 are provided, and the plurality of notches 133 are evenly arranged along the circumferential direction of the first connection end 13.

[0044] In this embodiment, a plurality of notches 133 can be provided, and the plurality of notches 133 are evenly arranged along the circumferential direction of the first connection end 13. For example, three notches 133 are provided in the figure, and the three notches 133 are evenly distributed in the circumferential direction of the first connection end 13, so that a plurality of elastic arms are formed between the outer side wall of the annular groove 131 and the outer peripheral wall of the first connection end 13, further increasing the elastic change amount of the first connection end 13. At the same time, the elastic force in the circumferential direction of the through hole 111 at the connection position between the first connection end 13 and the lens holder 30 is evenly distributed, so that the barrel 10 is uniformly stressed, further strengthening the stable connection effect between the barrel 10 and the lens holder 30.

[0045] Please refer to again Figure 3 , in an alternative embodiment, the side wall surface of the notch 133 away from the end face of the first connection end 13 is flush with the bottom wall surface of the annular groove 131.

[0046] In this embodiment, the distance between the side wall surface of the notch 133 away from the end face of the first connection end 13 and the end face of the first connection end 13 is the length of the notch 133 in the axial direction of the through hole 111, and the distance from the bottom wall surface of the annular groove 131 to the end face of the first connection end 13 is the depth of the annular groove 131. Therefore, making the side wall surface of the notch 133 away from the end face of the first connection end 13 flush with the bottom wall surface of the annular groove 131 means that the dimensions of the notch 133 and the annular groove 131 in the axial direction of the through hole 111 are the same. This structure can make the elastic deformation performance of the formed elastic arms more obvious, further increasing the error adjustment amount when the barrel 10 and the lens holder 30 are matched, and at the same time further increasing the assembly convenience and avoiding the adaptation problem.

[0047] In an alternative embodiment, an external thread 135 is provided on the outer peripheral surface of the first connection end 13.

[0048] In this embodiment, an external thread 135 is provided on the outer peripheral surface of the first connection end 13, that is, an external thread 135 is provided on the outer periphery of the structure that can undergo elastic deformation. For example, the annular structure formed by the outer side wall of the annular groove 131 and the outer peripheral wall of the first connection end 13 in the above embodiment, or the elastic arms formed by the two. The first connection end 13 and the lens mount 30 are connected by screw fit. This connection structure is convenient for assembly and can be easily disassembled when replacement or repair is required. At the same time, the screw connection structure has good stability, and the loose fit formed by this structure can also effectively avoid the problem of lens focus misalignment through the elastic deformation of the first connection end 13.

[0049] Of course, the first connection end 13 and the lens mount 30 can also be fixedly connected by bonding, welding or other means. Or they can be connected by other detachable connection methods, such as snap fits.

[0050] In an alternative embodiment, in the axial direction of the through hole 111, the length of the external thread 135 is less than the depth of the groove.

[0051] In this embodiment, in the axial direction of the through hole 111, the length of the external thread 135 is set to be less than the depth of the groove, so that the length of the elastic deformation of the first connection end 13 is greater than the length of the connection between the first connection end 13 and the lens mount 30. Thus, it can be ensured that during the screw connection process of the first connection end 13, there is a small deformation space on the outer peripheral surface at each place, so that the fit between the first connection end 13 and the lens mount 30 is in a "neither loose nor tight" state, effectively improving the adaptation rate and the focus accuracy.

[0052] Please refer to Figure 1 , in an alternative embodiment, a holding portion 137 is protruded on the circumferential surface of the first connection end 13. The holding portion 137 is disposed away from the body 11, and the holding portions 137 are uniformly distributed along the circumferential direction of the first connection end 13.

[0053] In this embodiment, the outer peripheral surface of the first connecting end 13 is not provided with threads, but is connected to the lens holder 30 by a plug-in manner. To achieve connection stability, a holding portion 137 is provided on the outer peripheral surface of the first connecting end 13. The holding portion 137 can be one, and this holding portion 137 is evenly distributed in the circumferential direction of the first connecting end 13, that is, a holding ring; or there are multiple holding portions 137, and the multiple holding portions 137 are evenly distributed in the circumferential direction of the first connecting end 13, which is not limited herein. The holding portion 137 is integrally formed with the first connecting end 13 and protrudes from the outer peripheral surface of the first connecting end 13, which is convenient for processing and has high structural strength. At this time, the diameter of the first connecting end 13 for mating connection increases, so that the first connecting end 13 and the lens holder 30 achieve an interference fit, thereby realizing the firm connection between the lens barrel 10 and the lens holder 30, not easily shaking, and combined with the elastic deformation of the first connecting end 13, it can also prevent the assembly of the two from being too tight to cause fitting problems and improve the assembly efficiency.

[0054] Optionally, the holding portion 137 is provided on the outer peripheral surface of the first connecting end 13 near the end face, and when the holding portion 137 is a holding ring, multiple holding rings can also be arranged at intervals in the axial direction of the through hole 111. While ensuring no fitting problems and focusing problems, further stable connection can be achieved, improving the yield rate of the lens.

[0055] In an alternative embodiment, a guiding inclined surface 1371 is provided at one end of the holding portion 137 facing away from the body 11.

[0056] In this embodiment, in order to facilitate the insertion of the lens barrel 10 into the lens holder 30, a guiding inclined surface 1371 is provided at one end of the holding portion 137 facing away from the body 11. The guiding inclined surface 1371 gradually moves away from the through hole 111 in the direction from the first connecting end 13 to the body 11, so that the diameter of the first connecting end 13 near the end face is smaller, which is convenient for inserting into the hole of the lens holder 30, and when the lens barrel 10 is inserted into the lens holder 30, it can slide in along the inclination direction of the guiding inclined surface 1371, improving the plug-in efficiency and saving effort.

[0057] It should be noted that when the lens barrel 10 is provided with an external thread 135, the cross-sectional shape of the first connecting end 13 is circular. When the lens barrel 10 is not provided with an external thread 135 and an interference fit is used, the cross-section of the first connecting end 13 can be circular, square, rectangular, regular pentagonal, triangular or irregularly shaped. Correspondingly, when the holding portion 137 is a holding ring, it is also set to have the same shape as the cross-section of the first connecting end 13, making the assembly more convenient.

[0058] Please refer to Figures 6 to 8, the present invention also provides a lens assembly 100, including a lens and a lens mount 30. The lens mount 30 is formed with an installation cavity 30a. The lens includes a lens barrel 10, and the specific structure of the lens barrel 10 refers to the above embodiments. The first connection end 13 of the lens barrel 10 is installed in the installation cavity 30a. Since the lens barrel 10 of the lens assembly 100 of the present invention includes all the technical solutions of the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here.

[0059] Specifically, the lens further includes a lens element, which is installed in the through hole 111 of the lens barrel 10. The lens barrel 10 can be connected to the lens mount 30 by screw connection or interference fit, or can be connected by fixed connection methods such as welding and bonding, or by detachable connection methods such as snap connection. In this embodiment, the lens mount 30 includes a base 31 and a connecting portion 33. The connecting portion 33 protrudes from the base 31 and encloses with the base 31 to form the installation cavity 30a for connecting the first connection end 13 of the lens barrel 10. The surface of the base 31 connected to the connecting portion 33 is perpendicular to the extending direction of the first connection end 13, which can ensure the vertical connection of the lens barrel 10 and make the lens focus more accurately.

[0060] The technical solution of this embodiment is to provide an annular groove 131 on the end face of the first connection end 13, so that the structure formed by the outer peripheral wall of the first connection end 13 and the outer side wall of the annular groove 131 can undergo elastic deformation, making the cooperation between the lens barrel 10 and the lens mount 30 have a certain elasticity. On the one hand, it is convenient for the assembly and disassembly of the lens barrel 10 and the lens mount 30 to solve the problem of "too tight". On the other hand, when the lens barrel 10 is offset due to external force, the lens barrel 10 can be reset by the elastic force of the first connection end 13, and the problem of lens focus misalignment will not occur, thus solving the problem of "too loose", making the torsion of the lens barrel 10 and the lens mount adapted, and improving production efficiency and product quality.

[0061] In addition, the lens assembly 100 further includes a filter switch (not shown), which can be arranged in the lens mount 30 and is perpendicular to the lens element of the lens, which is more conducive to the accurate focusing of the lens.

[0062] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A lens barrel for mounting a camera lens, characterized in that, The lens barrel includes a main body and a first connection end provided at one end of the main body. The main body is formed with a through hole that penetrates the first connection end. The first connection end is provided with an annular groove on its end face, and the annular groove extends along the axial direction of the through hole. In the direction from the main body to the end face of the first connection end, the opening ring width of the annular groove gradually increases. A notch communicating with the annular groove is provided on the outer peripheral surface of the first connection end. The notch extends along the axis direction of the through hole and penetrates the end face of the first connection end. The side wall surface of the notch away from the end face of the first connection end is flush with the bottom wall surface of the annular groove. The corner of the side wall surface of the notch away from the end face of the first connection end is an arc surface. A holding portion is convexly provided on the peripheral surface of the first connection end. The holding portion is arranged away from the main body, and the holding portions are evenly distributed along the circumferential direction of the first connection end. The holding portion is integrally formed with the first connection end. A guiding inclined surface is provided at one end of the holding portion facing away from the main body. The guiding inclined surface gradually moves away from the through hole in the direction from the first connection end to the main body.

2. The lens barrel according to claim 1, characterized in that, There are a plurality of notches, and the plurality of notches are evenly arranged along the circumferential direction of the first connection end.

3. A lens assembly, characterized in that, It includes a lens and a lens mount. The lens mount is formed with an installation cavity. The lens includes the lens barrel as described in any one of claims 1-2, and the first connection end of the lens barrel is installed in the installation cavity.

Images