Focus lens and electronic device

Abstract

The utility model belongs to optical lens technical field discloses a focusing lens and electronic equipment. Focusing lens includes main cylinder, focusing group and rear group group. The inner wall of main cylinder is provided with annular step surface, and there is first inclination angle between annular step surface and the axis of main cylinder. Focusing group is arranged in main cylinder, the axis of main cylinder and the axis of focusing group coincide, and the end of focusing group towards annular step surface has the abutting surface of abutting with annular step surface, and there is second inclination angle between abutting surface and focusing group. First inclination angle and second inclination angle are equal. Rear group group is arranged at the rear end of main cylinder. When rotating in this focusing lens, because of the mutual abutting effect of abutting surface and annular step surface, focusing group can be close to or away from rear group group, the interval between focusing group and rear group group changes, and then the adjustment of the focal length of focusing lens is realized. Compared with the focusing mode of screw structure, the accuracy and stability of focusing are improved.

Description

Technical Field

[0001] This utility model relates to the field of optical lens technology, and in particular to a focusing lens and electronic device. Background Technology

[0002] External telephoto lenses for electronic devices such as mobile phones or cameras require pre-focusing during production. The focusing structure typically features external threads on the outer circumference of the focusing lens frame and internal threads on the inner wall of the main barrel that match these external threads. The focusing lens frame and main barrel are connected by these threads to allow the focusing lens frame to move within the main barrel when rotated. To ensure smooth rotation between the focusing lens frame and main barrel, a large gap is required between the threads. This large gap can cause tilting between the focusing lens frame and main barrel, leading to poor focusing. Furthermore, significant vibration or shaking after focusing can cause the focusing lens to shift focus. Utility Model Content

[0003] The purpose of this invention is to provide a focusing lens and electronic device that improves the accuracy and stability of focusing and avoids focus drift.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] Focusing lenses, including:

[0006] The main cylinder has an annular stepped surface on its inner wall, and the annular stepped surface has a first inclination angle with the axis of the main cylinder.

[0007] A focusing group is disposed inside the main cylinder, the axis of the main cylinder and the axis of the focusing group coincide, one end of the focusing group facing the annular step surface has a bearing surface that abuts against the annular step surface, the bearing surface has a second tilt angle with the axis of the focusing group, and the first tilt angle and the second tilt angle are equal;

[0008] The rear group is located at the rear end of the main tube;

[0009] When the focusing group rotates, the annular stepped surface keeps the focusing group close to or away from the rear group by always abutting against the bearing surface.

[0010] As an optional embodiment, the annular stepped surface has a high position and a low position along the axial direction of the main cylinder, and the distance between the high position and the low position of the annular stepped surface is 0.2mm-1.6mm;

[0011] The bearing surface has a high position and a low position along the axial direction of the focusing group, and the distance between the high position and the low position of the bearing surface is 0.2mm-1.6mm.

[0012] As an alternative, the annular stepped surface has a high position and a low position along the axial direction of the main cylinder, the high position of the annular stepped surface is provided with a first high position surface, and the low position of the annular stepped surface is provided with a first low position surface; the bearing surface has a high position and a low position along the axial direction of the focusing group, the high position of the bearing surface is provided with a second high position surface, and the low position of the bearing surface is provided with a second low position surface.

[0013] When the distance between the focusing group and the rear group is at its minimum, the first high surface abuts against the second low surface and the first low surface abuts against the second high surface; when the distance between the focusing group and the rear group is at its maximum, the first high surface abuts against the second high surface, and there is a gap between the first low surface and the second low surface.

[0014] As an optional solution, the focusing group includes a focusing lens frame, a focusing lens group, and a first pressure ring. The focusing lens frame is disposed inside the main tube, and the end of the focusing lens frame facing the annular stepped surface has the supporting surface. The focusing lens group is disposed inside the focusing lens frame, and the first pressure ring is fixedly disposed inside the focusing lens frame and presses against the focusing lens group.

[0015] As an optional solution, the focusing lens frame and the main tube are bonded together with adhesive.

[0016] As an optional solution, the end of the focusing lens frame facing away from the supporting surface is provided with a locking interface for engaging with the focusing tool.

[0017] As an optional embodiment, the rear group includes a rear frame, a rear lens group, and a second retaining ring. The rear frame is fixedly connected to the rear end of the main lens, the rear lens group is disposed within the rear frame, and the second retaining ring is fixedly disposed within the rear frame and presses against the rear lens group.

[0018] As an alternative, the rear frame has a recessed groove at one end facing the main tube, and the rear end of the main tube is embedded in the recessed groove.

[0019] As an optional feature, the focusing lens also includes multiple screws;

[0020] The rear end of the main tube is provided with multiple circumferentially distributed through holes, and the rear group lens frame is provided with multiple threaded holes corresponding to the through holes at the bottom of the recessed groove. Multiple screws are respectively inserted into the multiple through holes and screwed into the corresponding threaded holes.

[0021] Electronic device, including the focusing lens described in any of the above embodiments.

[0022] The beneficial effects of this utility model are:

[0023] The focusing lens provided by this utility model, by setting an annular stepped surface and a supporting surface with the same tilt angle, allows the focusing group to move closer to or further away from the rear group when rotating due to the mutual abutment of the supporting surface and the annular stepped surface. This changes the distance between the focusing group and the rear group, thereby achieving the adjustment of the focal length of the focusing lens. Compared with the focusing method of the thread structure, it improves the accuracy and stability of focusing, reduces the risk of wear and focus drift, and increases the service life. Attached Figure Description

[0024] Figure 1 This is an exploded view of the focusing lens provided in this embodiment of the utility model;

[0025] Figure 2 This is a top view of the main cylinder involved in the embodiment of this utility model;

[0026] Figure 3 yes Figure 2 Cross-sectional view of AA;

[0027] Figure 4 This is a bottom view of the focusing lens frame involved in the embodiment of this utility model;

[0028] Figure 5 yes Figure 4 Cross-sectional view of BB;

[0029] Figure 6 This is a schematic diagram of the structure of the focusing lens frame and the main tube when they are closest to each other, according to an embodiment of this utility model.

[0030] Figure 7 This is a schematic diagram of the structure of the focusing lens frame and the main tube when the distance between them is at its maximum, according to an embodiment of this utility model.

[0031] Figure 8 This is an axonometric view of the focusing lens frame involved in the embodiment of this utility model;

[0032] Figure 9 This is an axonometric view of the rear frame of the present invention.

[0033] In the picture:

[0034] 1. Main cylinder; 11. Annular stepped surface; 111. First high surface; 112. First low surface; 12. Through hole;

[0035] 2. Focusing group; 21. Focusing lens frame; 211. Support surface; 2111. Second high surface; 2112. Second low surface; 212. Snap-fit ​​interface; 22. Focusing lens group; 23. First pressure ring;

[0036] 3. Rear lens group; 31. Rear lens frame; 311. Recessed groove; 312. Threaded hole; 32. Rear lens group; 33. Second retaining ring;

[0037] 4. Screws;

[0038] 100. Focusing tools. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1-9As shown, this utility model embodiment provides a focusing lens, which includes a main barrel 1, a focusing group 2, and a rear group 3. The inner wall of the main cylinder 1 is provided with an annular stepped surface 11, which is set as an inclined surface, that is, the annular stepped surface 11 and the axis of the main cylinder 1 are not perpendicular, so that the annular stepped surface 11 and the axis of the main cylinder 1 have a first inclined angle. The focusing group 2 is set inside the main cylinder 1, and the axis of the main cylinder 1 and the axis of the focusing group 2 coincide. The end of the focusing group 2 facing the annular stepped surface 11 has a bearing surface 211 that abuts against the annular stepped surface 11. The bearing surface 211 is set as an inclined surface, that is, the bearing surface 211 and the axis of the focusing group 2 are not perpendicular, so that the bearing surface 211 and the focusing group 2 have a second inclined angle. The first inclined angle and the second inclined angle are equal, so that when the focusing group 2 is installed inside the main cylinder 1 and in the initial installation position, the bearing surface 211 and the annular stepped surface 11 can be completely fitted. The rear group 3 is set at the rear end of the main cylinder 1.

[0044] To adjust the focal length of the focusing lens, focusing group 2 needs to be rotated. During the rotation, the supporting surface 211 remains in contact with the annular step surface 11. Since both the supporting surface 211 and the annular step surface 11 are inclined, they each have a high position and a low position. When the supporting surface 211 and the annular step surface 11 are fully in contact, i.e., the high position of the supporting surface 211 and the low position of the annular step surface 11 are in contact, and the low position of the supporting surface 211 and the high position of the annular step surface 11 are in contact, the distance between focusing group 2 and the rear group 3 is minimized. As focusing group 2 gradually rotates and rotates 180°, the high position of the supporting surface 211 and the high position of the annular step surface 11 are in contact, maximizing the distance between focusing group 2 and the rear group 3.

[0045] Understandably, this focusing lens, by setting an annular stepped surface 11 and a bearing surface 211 with consistent tilt angles, allows the focusing group 2 to move closer to or further away from the rear group 3 when rotating due to the mutual contact between the bearing surface 211 and the annular stepped surface 11. This changes the distance between the focusing group 2 and the rear group 3, thereby adjusting the focal length of the focusing lens. Furthermore, in the prior art, the threaded structure requires multiple rotations to be fully unscrewed during disassembly, and the small contact surface of the threaded structure is prone to damage, resulting in inaccurate focusing. Compared to the focusing method of the threaded structure, this focusing lens improves the accuracy, stability, and disassembly / reassembly efficiency of focusing by using the surface-to-surface contact between the bearing surface 211 and the annular stepped surface 11, reducing the risk of wear and focus drift, and increasing service life.

[0046] It should be noted that before focusing is completed, focusing group 2 can rotate inside the main tube 1; after focusing is completed, focusing group 2 is fixed to the main tube 1.

[0047] Optionally, such as Figures 2-7 As shown, the distance between the high and low positions of the annular step surface 11 and the distance between the high and low positions of the bearing surface 211 are both 0.2mm-1.6mm. For example, the distances are 0.2mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, or 1.6mm. In this embodiment, the distance is preferably set to 1mm, that is, the first tilt angle and the second tilt angle are both 87.86°, so that the focusing range of the focusing group 2 is 0mm-1mm, ensuring the optimization of image sharpness.

[0048] Optionally, the annular stepped surface 11 has a first high surface 111 at its high position and a first low surface 112 at its low position; the bearing surface 211 has a second high surface 2111 at its high position and a second low surface 2112 at its low position. When the distance between the focusing group 2 and the rear group 3 is at its minimum, the first high surface 111 abuts against the second low surface 2112, and the first low surface 112 abuts against the second high surface 2111; when the distance between the focusing group 2 and the rear group 3 is at its maximum, the first high surface 111 and the second high surface 2111 abut against each other, and there is a gap between the first low surface 112 and the second low surface 2112. Figure 7 The angle between the bearing surface 211 and the axis of the focusing group 2 is 92.14°. By setting the first high surface 111, the first low surface 112, the second high surface 2111, and the second low surface 2112, the annular stepped surface 11 and the bearing surface 211 avoid the formation of sharp points when they come into contact, making the structure more stable and reducing wear. It can be understood that from the minimum to the maximum distance between the focusing group 2 and the rear group 3, the rotation angle of the focusing group 2 is 180°, that is, the rotation angle range of the focusing group 2 is between 0° and 180°.

[0049] It is understandable that the distance between the first high surface 111 and the first low surface 112, as well as the distance between the second high surface 2111 and the second low surface 2112, are both 0.2mm-1.6mm.

[0050] Specifically, refer to Figure 1As shown, the focusing group 2 includes a focusing lens frame 21, a focusing lens group 22, and a first retaining ring 23. The focusing lens frame 21 is disposed inside the main tube 1, and the end of the focusing lens frame 21 facing the annular stepped surface 11 has a bearing surface 211. The focusing lens group 22 is disposed inside the focusing lens frame 21. The first retaining ring 23 is fixedly disposed (and can be screwed) inside the focusing lens frame 21 and presses against the focusing lens group 22. This structure enables the focusing lens group 22 to be installed inside the focusing lens frame 21 through the first retaining ring 23, and the focusing lens group 22 is moved by rotating the focusing lens frame 21, thereby achieving focusing.

[0051] To facilitate the rotation of the focusing frame 21, such as Figure 8 and combined Figure 1 As shown, a focusing tool 100 is detachably connected to one end of the focusing lens frame 21 away from the support surface 211. A locking interface 212 is provided at the other end of the focusing lens frame 21 away from the support surface 211. Two locking interfaces 212 can be provided, and the two locking interfaces 212 are distributed at 180°. The focusing tool 100 can be engaged with the locking interface 212. Rotating the focusing tool 100 can drive the focusing lens frame 21 to rotate, making focusing more convenient.

[0052] Furthermore, after focusing is completed on the focusing lens frame 21, to ensure that the focusing lens frame 21 does not move, a fixing adhesive (UV adhesive) can be used to bond the focusing group 2 to the main tube 1, that is, to bond the focusing lens frame 21 of the focusing group 2 to the main tube 1. Specifically, the pre-reserved adhesive grooves on the main tube 1 and the focusing lens frame 21 are filled with fixing adhesive, and the UV lamp wavelength is 365nm and the energy is 4000~8000mj / cm. 2 Then, solidify the material to reduce the probability of scorching.

[0053] Specifically, such as Figures 1-2 and Figure 9 As shown, the rear lens group 3 includes a rear lens frame 31, a rear lens group 32, and a second retaining ring 33. The rear lens frame 31 is fixedly connected to the rear end of the main tube 1. The rear lens group 32 is disposed within the rear lens frame 31. The second retaining ring 33 is fixedly disposed (and can be screwed) within the rear lens frame 31 and presses against the rear lens group 32. This structure, through the second retaining ring 33, is fixedly connected to the rear lens frame 31, enabling the rear lens group 32 to be installed within the rear lens frame 31. When the focusing lens frame 21 moves within the main tube 1 along the axis of the main tube 1, the distance between the focusing lens group 22 and the rear lens group 32 changes, thereby achieving focusing of the focusing lens.

[0054] To ensure coaxial assembly of the rear lens frame 31 and the main lens 1, a recessed groove 311 is provided at the end of the rear lens frame 31 facing the main lens 1. The axis of the recessed groove 311 coincides with the axis of the rear lens frame 31, and the rear end of the main lens 1 is embedded in the recessed groove 311. This structure, by embedding the rear end of the main lens 1 into the recessed groove 311, ensures that the axes of the rear lens frame 31 and the main lens 1 are aligned during assembly, further facilitating the fixed connection between the rear lens frame 31 and the main lens 1 without requiring alignment; it also ensures the firmness of the connection between the rear lens frame 31 and the main lens 1.

[0055] Optionally, the rear lens frame 31 and the main tube 1 are fixedly connected by multiple screws 4. The rear end of the main tube 1 is provided with multiple circumferentially distributed through holes 12. The rear lens frame 31 is provided with multiple threaded holes 312 corresponding to the through holes 12 at the bottom of the recessed groove 311. The multiple screws 4 are respectively inserted into the multiple through holes 12 and screwed into the corresponding threaded holes 312, so as to fix the rear end of the rear lens frame 31 and the main tube 1.

[0056] This utility model embodiment also provides an electronic device including the aforementioned focusing lens. By incorporating the aforementioned focusing lens, this electronic device, such as a mobile phone or camera, avoids focus drift, improves focusing accuracy and stability, and extends its service life.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A focusing lens, characterized in that, include: The main cylinder (1) has an annular stepped surface (11) on its inner wall, and the annular stepped surface (11) has a first inclination angle with the axis of the main cylinder (1). A focusing group (2) is disposed inside the main cylinder (1). The axis of the main cylinder (1) coincides with the axis of the focusing group (2). The end of the focusing group (2) facing the annular step surface (11) has a bearing surface (211) that abuts against the annular step surface (11). The bearing surface (211) has a second tilt angle with the axis of the focusing group (2), and the first tilt angle and the second tilt angle are equal. The rear group (3) is located at the rear end of the main tube (1); When the focusing group (2) rotates, the annular step surface (11) abuts against the bearing surface (211) to bring the focusing group (2) closer to or further away from the rear group (3).

2. The focusing lens according to claim 1, characterized in that, The annular step surface (11) has a high position and a low position along the axial direction of the main cylinder (1), and the distance between the high position of the annular step surface (11) and the low position of the annular step surface (11) is 0.2mm-1.6mm; The bearing surface (211) has a high position and a low position along the axial direction of the focusing group (2), and the distance between the high position and the low position of the bearing surface (211) is 0.2mm-1.6mm.

3. The focusing lens according to claim 1, characterized in that, The annular step surface (11) has a high position and a low position along the axial direction of the main cylinder (1). The high position of the annular step surface (11) is provided with a first high position surface (111), and the low position of the annular step surface (11) is provided with a first low position surface (112). The bearing surface (211) has a high position and a low position along the axial direction of the focusing group (2). The high position of the bearing surface (211) is provided with a second high position surface (2111), and the low position of the bearing surface (211) is provided with a second low position surface (2112). When the distance between the focusing group (2) and the rear group (3) is at its minimum, the first high surface (111) abuts against the second low surface (2112) and the first low surface (112) abuts against the second high surface (2111); when the distance between the focusing group (2) and the rear group (3) is at its maximum, the first high surface (111) abuts against the second high surface (2111), and there is a gap between the first low surface (112) and the second low surface (2112).

4. The focusing lens according to claim 1, characterized in that, The focusing group (2) includes a focusing lens frame (21), a focusing lens group (22), and a first pressure ring (23). The focusing lens frame (21) is disposed inside the main tube (1), and the end of the focusing lens frame (21) facing the annular stepped surface (11) has the bearing surface (211). The focusing lens group (22) is disposed inside the focusing lens frame (21), and the first pressure ring (23) is fixedly disposed inside the focusing lens frame (21) and presses against the focusing lens group (22).

5. The focusing lens according to claim 4, characterized in that, The focusing lens frame (21) and the main tube (1) are bonded together with adhesive.

6. The focusing lens according to claim 4, characterized in that, The focusing lens frame (21) is provided with a locking interface (212) for engaging with the focusing tool (100) at the end opposite to the bearing surface (211).

7. The focusing lens according to claim 1, characterized in that, The rear group (3) includes a rear frame (31), a rear lens group (32), and a second retaining ring (33). The rear frame (31) is fixedly connected to the rear end of the main tube (1). The rear lens group (32) is disposed inside the rear frame (31). The second retaining ring (33) is fixedly disposed inside the rear frame (31) and presses against the rear lens group (32).

8. The focusing lens according to claim 7, characterized in that, The rear frame (31) has a recessed groove (311) at one end facing the main tube (1), and the rear end of the main tube (1) is embedded in the recessed groove (311).

9. The focusing lens according to claim 8, characterized in that, The focusing lens also includes multiple screws (4); The rear end of the main tube (1) is provided with a plurality of circumferentially distributed through holes (12), and the rear group lens frame (31) is provided with a plurality of threaded holes (312) corresponding one-to-one with the through holes (12) at the bottom of the recessed groove (311). A plurality of screws (4) are respectively inserted into the plurality of through holes (12) and screwed into the corresponding threaded holes (312).

10. An electronic device, characterized in that, Includes the focusing lens as described in any one of claims 1-9.

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