External lens and shooting equipment

Abstract

The invention relates to an external lens and shooting equipment, the external lens comprises a lens assembly and a lens frame, the lens assembly has an axial direction and a circumferential direction surrounding the axial direction, one side of the lens assembly along the axial direction is provided with a mounting end, and the mounting end is provided with a plurality of circumferentially spaced positioning blocks; the lens frame is matched with an electronic equipment lens and is provided with a first end and a second end which are opposite in the axial direction, the first end is provided with a mounting groove for limiting the mounting end, the inner side wall of the mounting groove is provided with a plurality of limiting blocks spaced in the circumferential direction, and a notch for the positioning block to enter and exit is formed between every two adjacent limiting blocks; the end face of one of the mounting end and the first end is provided with a glass bead, the end face of the other one is provided with a glass bead groove, and when the positioning block rotates in the mounting groove until the positioning block and the notch are staggered by a preset angle, the glass bead is embedded in the glass bead groove in an aligned manner. The external lens is simple in structure and rapid to assemble, and the installation stability of the external lens on the shooting equipment can be further improved due to the fact that the glass beads and the glass bead grooves are matched for positioning.

Description

Technical Field

[0001] The present invention relates to the technical field of photographic accessories, and in particular to an external lens and a photographing device. Background Art

[0002] With the rapid development of mobile phone product technology, the quality of the camera built into the mobile phone, the parameters of the camera, the functions of the camera mode, and the demand of consumers for taking pictures with mobile phones are constantly increasing with the upgrade of hardware. As people continue to pursue and improve the camera function of mobile phones, the demand for external lenses for mobile phones has been continuously expanding. The earliest external lenses are usually telephoto lenses, which solve the problem that when general mobile phones need to take distant or panoramic photos, they are limited by the overall structure of the mobile phone, resulting in poor shooting effects. Therefore, external lenses need to be connected to achieve the above effects. In order to achieve higher shooting requirements, some smartphones will use a professional camera module lens connected to the original camera position, thereby improving the picture quality of smartphone shooting. Using this method of externally connecting the camera module lens to the smartphone housing, it takes time to align and fix the smartphone and the camera module lens, and there are problems with low connection and installation efficiency. Summary of the invention

[0003] The present invention provides an external lens and shooting equipment to solve the technical problem of low connection and installation efficiency in aligning and fixing a smart phone and a camera module lens.

[0004] First aspect

[0005] The present invention discloses an external lens, comprising:

[0006] A lens assembly having an axial direction and a circumferential direction around the axial direction, wherein the lens assembly has a mounting end along one side of the axial direction, and the mounting end is provided with a plurality of positioning blocks spaced apart along the circumferential direction;

[0007] A lens frame adapted for a camera assembly of an electronic device and having a first end and a second end arranged opposite to each other along the axial direction, wherein the first end is provided with a mounting groove for limiting the mounting end, and the inner side wall of the mounting groove is provided with a plurality of limiting blocks spaced along the circumferential direction, and a notch is formed between two adjacent limiting blocks to allow the positioning block to enter and exit;

[0008] A glass bead is provided on the end surface of one of the mounting end and the first end, and a glass bead groove is provided on the end surface of the other end. When the positioning block enters the mounting groove through the notch and rotates in the mounting groove until the positioning block and the notch are offset by a preset angle, the glass bead is aligned and embedded in the glass bead groove.

[0009] In one embodiment, there are multiple glass bead grooves, and the multiple glass bead grooves are arranged at intervals along the circumferential direction. When the positioning block and the notch are staggered at two different preset angles, the glass beads are embedded in two different glass bead grooves.

[0010] In one embodiment, the number of the mounting grooves is multiple and arranged at intervals, the number of the glass bead is one and is arranged on the end surface of the first end; the glass bead groove radially extends around the circumferential center axis of the lens assembly to form a slide groove, and when the mounting end is installed in different mounting grooves, the glass bead is limited to different length positions of the slide groove.

[0011] In one embodiment, the number of the mounting grooves is multiple and arranged at intervals, the number of the glass bead is one and is arranged on the end surface of the first end, and the straight-line distance between the glass bead and the central axis of each of the mounting grooves is equal; the straight-line distance between the glass bead groove and the central axis of the lens assembly is equal to the straight-line distance between the glass bead and the central axis of the mounting groove.

[0012] In one embodiment, the external lens includes an elastic pad, which is arranged between the first end and the mounting end, and the elastic pad accumulates and releases elastic force in the axial direction; when the positioning block and the notch are staggered by a preset angle, the elastic force released by the elastic pad can further enhance the abutment force between the positioning block and the limit block.

[0013] In one of the embodiments, the end surface of the first end is provided with a receiving groove, and the elastic pad is partially embedded in the receiving groove; the number of the elastic pads and the receiving grooves is multiple and one-to-one corresponding, and the elastic pads are distributed on the end surface of the first end at circumferential intervals around the opening of the installation groove.

[0014] In one embodiment, the limit block extends radially inwardly along the mounting groove and is connected to the first end, a side surface of the limit block facing the mounting end is smoothly connected to an end surface of the first end, and the elastic pad is arranged on a side of the limit block facing the mounting end.

[0015] In one of the embodiments, a mounting column is protruded along the axial direction on the end surface of the mounting end, and the positioning block is radially extended outward from the end of the mounting column. Along the axial direction, the positioning block and the end surface of the mounting end are spaced apart from each other to form an annular clamping groove, and when the positioning block rotates in the mounting groove, the limit block is clamped in the annular clamping groove.

[0016] In one embodiment, the lens frame includes a blocking block, which protrudes from the side of the limit block facing away from the lens assembly, and the positioning block can be rotated in the installation groove until the positioning block abuts against the blocking block to stabilize the positioning block and the notch so that they are staggered and rotated to a maximum preset angle.

[0017] Second aspect

[0018] The invention discloses a photographing device, comprising:

[0019] An electronic device with a protruding camera assembly on the back;

[0020] As in any of the foregoing embodiments, the external lens, the second end is adapted to be mounted on the camera assembly, and the lens of the camera assembly is opposite to the mounting slot.

[0021] It can be seen from the above technical solutions that the embodiments of the present invention have at least the following advantages and positive effects:

[0022] The embodiment of the present invention provides an external lens and a shooting device, wherein the second end of the lens frame is adapted to be installed on the camera assembly of the shooting device, and the positioning block on the lens assembly enters into the installation groove after being aligned with the notch of the lens frame, and the positioning block rotates to stably install the lens assembly on the first end of the lens frame, thereby fixing the external lens to the camera assembly of the shooting device. On the one hand, the user can optimize the shooting parameters of the camera assembly of the shooting device through the function of the external lens; on the other hand, the cooperation and positioning of the glass bead and the glass bead groove can further improve the installation stability of the external lens on the shooting device, so that the external lens and the camera assembly are stably connected. Therefore, the external lens of the present application has the advantages of simple structure, quick installation, optimized shooting parameters and better shooting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of a photographing device according to an embodiment of the present application;

[0025] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the shooting device shown;

[0026] Figure 3 for Figure 1The overall structure diagram of the external lens in the shooting device shown;

[0027] Figure 4 for Figure 3 A schematic diagram of the exploded structure of the external lens shown;

[0028] Figure 5 for Figure 4 Another perspective view of the exploded view shown;

[0029] Figure 6 for Figure 5 A schematic diagram showing that the positioning block in the external lens is in the release position;

[0030] Figure 7 for Figure 5 A schematic diagram showing a positioning block in a locking position in an external lens;

[0031] Figure 8 For along Figure 7 Schematic diagram of the cross-sectional structure along the AA direction.

[0032] The following are the descriptions of the reference numerals:

[0033] 1. Filming equipment;

[0034] 10. External lens; 100. Lens assembly; 110. Mounting end; 120. Positioning block; 130. Glass bead groove; 131. Slide groove; 140. Mounting column; 150. Annular clamp groove; 160. External thread; 200. Mirror frame; 210. First end; 211. Accommodating groove; 220. Second end; 230. Mounting groove; 240. Limiting block; 250. Notch; 260. Glass bead; 270. Stopper; 300. Elastic pad;

[0035] 20. Electronic equipment; 21. Camera components. DETAILED DESCRIPTION

[0036] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Combined with reference Figure 1 and Figure 2 The present invention provides an external lens 10, which can be equipped with a variety of different lenses or lens groups to have different shooting functions and effects. The shooting functions here include but are not limited to pixels, aperture, sensitivity, exposure compensation, etc. The external lens 10 is used to be installed on the camera assembly 21 protruding from the back of the electronic device 20 to be assembled into a shooting device 1 with better shooting effects, that is, the external lens 10 can be used as an auxiliary lens to optimize the shooting effect of the electronic device 20 with built-in shooting function. The electronic device 20 includes but is not limited to mobile phones, tablets, learning machines, phone watches, etc. In addition, the external lens 10 can also be directly installed on the shooting device 1 as a lens alone for video recording and photography.

[0040] Combined with reference Figure 2-5 The present invention provides an external lens 10, which can be matched with a variety of different lenses or lens groups to have functional effects of different shooting parameters. The external lens 10 includes a lens assembly 100 and a lens frame 200 that are adapted and connected. The lens assembly 100 has an axial direction and a circumferential direction around the axial direction. The lens assembly 100 has a mounting end 110 on one side along the axial direction, and the mounting end 110 is provided with a plurality of positioning blocks 120 spaced apart along the circumferential direction. The lens frame 200 has a first end 210 and a second end 220 that are opposite to each other along the axial direction. The first end 210 is provided with a mounting groove 230 for limiting the mounting end 110. A plurality of limiting blocks 240 spaced apart along the circumferential direction are provided on the inner side wall of the mounting groove 23, and a notch 250 is formed between two adjacent limiting blocks 240 to allow the positioning block 120 to enter and exit the mounting groove 230. Figure 2 As shown, the second end 220 is adapted to be installed and connected to the camera assembly 21 of the electronic device 20, and the lens of the camera assembly 21 is opposite to the installation slot 230, so that the lens assembly 100 and the camera assembly 21 are aligned along the axial direction. Here, the lens assembly 100 and the lens frame 200 can also be adapted to be installed on the electronic device 20 separately, and the lens frame 200 can be used as a decorative accessory when it is assembled on the electronic device 20 separately.

[0041] Combined with reference Figure 5-7After passing through the notch 250 , the positioning block 120 can extend inwardly in the mounting groove 230 and rotate circumferentially, that is, the mounting end 110 rotates relative to the first end 210 , and the positioning block 120 switches between the release position and the locking position. Figure 4 It is shown that when the positioning block 120 is in the release position, the positioning block 120 is aligned with the notch 250 so that the mounting end 110 can be axially disengaged from the mounting groove 230, and the lens assembly 100 is separated from the lens frame 200; Figure 5 It is shown that when the positioning block 120 is in a locked state, the positioning block 120 and the notch 250 are staggered at a certain angle along the circumferential direction and the positioning block 120 and the limiting block 240 are relatively limited along the axial direction to prevent the mounting end 110 from axially disengaging from the mounting groove 230, and the lens assembly 100 is relatively fixedly connected to the lens frame 200. Here, the limiting block 240 is an arc-shaped block to adapt to the circumferential rotation of the positioning block 120. Of course, in this application, the shape of the limiting block 240 is not limited.

[0042] Furthermore, combined with reference Figure 4 and Figure 5 A glass bead 260 is disposed on the end surface of one of the mounting end 110 and the first end 210, and a glass bead groove 130 is disposed on the end surface of the other end. When the positioning block 120 enters the mounting groove 230 through the notch 250 and rotates in the mounting groove 230 until the positioning block 120 and the notch 250 are offset from each other by a preset angle, the positioning block 120 and the limiting block 240 are relatively limited in the axial direction, and the glass bead 260 is embedded in the glass bead groove 130 at the same time. Here, the glass bead 260 elastically enters and exits the glass bead groove 130 with an obvious concave-convex feeling. The cooperation between the glass bead 260 and the glass bead groove 130, on the one hand, enhances the rotation feel between the mounting end 110 and the first end 210; on the other hand, it serves as a reminder. When the glass bead 260 is limited in the glass bead groove 130, it reminds the user that the rotation has reached the preset angle, and the lens assembly 100 and the lens frame 200 are in a stable installation connection position corresponding to the preset angle; finally, when the user does not have a large rotation force, the glass bead 260 and the glass bead groove 130 also play a positioning role.

[0043] The present invention provides an external lens 10 and a shooting device 1, wherein the second end 220 of the lens frame 200 is adapted to be installed on the camera assembly 21 of the electronic device 20, and the positioning block 120 on the lens assembly 100 enters the installation groove 230 after being aligned with the notch 250 of the lens frame 200, and the positioning block 120 extends inwardly in the installation groove 230 and rotates circumferentially to stably install the lens assembly 100 on the first end 210 of the lens frame 200, thereby installing and fixing the external lens 10 on the camera assembly 21 of the electronic device 20. On the one hand, the user can optimize the shooting parameters of the camera assembly 21 of the shooting device 1 through the lens function of the external lens 10; on the other hand, the installation stability of the external lens 10 on the electronic device 20 can be further improved due to the coordinated positioning of the glass bead 260 and the glass bead groove 130. Therefore, the external lens 10 of the present application has the advantages of simple structure, quick installation, optimized shooting parameters and better shooting effect.

[0044] Preferably, in one embodiment, in combination with reference Figure 4 and Figure 5 , there are multiple bead glass grooves 130, and the multiple bead glass grooves 130 are arranged at intervals along the circumferential direction. During the rotation of the mounting end 110 relative to the first end 210, the bead glass 260 can move and jump in the adjacent bead glass grooves 130 to increase the rotation feel of the mounting end 110. When the positioning block 120 and the notch 250 are staggered at two different preset angles, the bead glass 260 is embedded in two different bead glass grooves 130 to meet the positioning function of multiple preset angles. It should be noted that, without considering the rotation feel and the positioning function requiring multiple preset angles, in this application, the number of bead glass grooves 130 is not limited.

[0045] Preferably, in combination with reference Figure 4 and Figure 5In one embodiment, the number of mounting grooves 230 is multiple and arranged at intervals, and the number of glass beads 260 is one and is arranged on the end surface of the first end 210. The glass bead groove 130 radially extends around the central axis of the lens assembly 100 to form a slide groove 131. When the mounting end 110 is aligned and installed in different mounting grooves 230, the glass beads 260 are aligned and limited to different length positions of the slide groove 131. The straight-line distances from the glass beads 260 to the central axis of different mounting grooves 230 are not equal, so the glass beads 260 are limited to different length positions of the slide groove 131. The glass bead groove 130 is set in the form of the slide groove 131 so that one glass bead groove 130 and one glass bead 260 can cooperate to adapt to the mounting end 110 being installed in the mounting grooves 230 at different positions. It should be noted that, firstly, in this application, the number of mounting grooves 230 is not limited, and multiple mounting grooves 230 are for increasing the external interface of the frame 200. Secondly, in this application, the shape of the glass bead groove 130 is also not limited. For example, in one embodiment, when the distance between the glass bead 260 and the central axis of each mounting groove 230 is equal, the glass bead groove 130 can be a hole-shaped point, and the distance between the glass bead groove 130 and the central axis of the lens assembly 100 is equal to the distance between the glass bead 260 and the central axis of the mounting groove 230.

[0046] Preferably, in combination with reference Figure 4 and Figure 8 In one embodiment, the external lens 10 includes an elastic pad 300, which is disposed between the mounting end 110 and the first end 210, and the elastic pad 300 accumulates and releases elastic force in the axial direction. When the positioning block 120 and the notch 250 are staggered at a preset angle and the positioning block 120 and the limit block 240 are relatively axially limited, the elastic force released by the elastic pad 300 can further enhance the abutment force between the positioning block 120 and the limit block 240, so as to further enhance the assembly compactness and installation stability between the mounting end 110 and the first end 210. It should be noted that, without considering the assembly compactness and installation stability between the mounting end 110 and the first end 210, in the present application, whether the elastic pad 300 is provided or not is not limited. In other embodiments, the positioning block 120 and the limit block 240 can also be fitted with interference fit to enhance the installation stability.

[0047] Preferably, reference Figure 8In one embodiment, the end surface of the first end 210 is provided with a receiving groove 211, and part of the elastic pad 300 is embedded in the receiving groove 211, and the other part of the elastic pad 300 protrudes from the end surface of the first end 210 to elastically abut the end surface of the mounting end 110, and the receiving groove 211 increases the structural compactness of the external lens 10 and the assembly compactness of the elastic pad 300. The number of elastic pads 300 and the receiving grooves 211 is multiple and one-to-one corresponding, and the elastic pads 300 are distributed at intervals on the end surface of the first end 210 around the opening of the mounting groove 230. It should be noted that, firstly, in the present application, whether the receiving groove 211 is provided or not is not limited. For example, in other embodiments, the elastic pad 300 can be directly bonded to the end surface of the first end 210 to improve the installation stability between the mounting end 110 and the first end 210. Secondly, the number of elastic pads 300 and the receiving grooves 211 is not limited, and the circumferential distribution is to provide circumferential force balance and enhance installation stability. For example, in other embodiments, the number of the elastic pad 300 can be one and the elastic pad 300 can be annularly surrounding the opening of the mounting groove 230. Such a design can also provide circumferential force balance.

[0048] Preferably, reference Figure 8 In one embodiment, the limit block 240 extends radially inwardly along the mounting groove 230 and the limit block 240 is connected to the first end 210, and the side surface of the limit block 240 facing the mounting end 110 is smoothly connected to the end surface of the first end 210, and the elastic pad 300 is arranged on the side of the limit block 240 facing the mounting end 110. The limit block 240 is arranged in this way to have both the limiting function and the function of providing an installation space for the elastic pad 300, which greatly improves the structural compactness of the entire external lens 10. Moreover, the elastic force of the elastic pad 300 directly acts on the limit block 240, further increasing the abutment force between the limit block 240 and the positioning block 120. It should be noted that, without considering the structural compactness of the external lens 10, in this application, the setting position of the elastic pad 300 is not limited, as long as it is arranged between the mounting end 110 and the first end 210.

[0049] Preferably, in combination with reference Figure 5 and Figure 8In one embodiment, the end surface of the mounting end 110 is provided with a mounting column 140 protruding along the axial direction, and the positioning block 120 mentioned above is extended radially outward from the end of the mounting column 140. In the axial direction, the positioning block 120 and the end surface of the mounting end 110 are spaced relative to form an annular clamping groove 150. When the positioning block rotates in the mounting groove 230, the limit block 240 is clamped in the annular clamping groove 150, and the positioning block 120 is hung on the side of the limit block 240 away from the first end 210. It should be noted that in the present application, whether the mounting column 140 and the annular clamping groove 150 are provided or not is not limited, as long as the means for the relative axial limitation of the positioning block 120 and the limit block 240 are met, they should be protected. For example, in other embodiments, the positioning block 120 can be in the form of a hook to be hung on the limit block 240, so as to achieve the relative axial limitation of the two.

[0050] Preferably, in combination with reference Figure 5-7 , the lens frame 200 includes a blocking block 270, which is protruding from the side of the limit block 240 facing away from the lens assembly 100, and the positioning block 120 can be rotated in the installation groove 230 until the positioning block 120 is circumferentially close to the blocking block 270, preventing the positioning block 120 from rotating excessively after being offset from the notch 250, thereby stabilizing the maximum preset angle of rotation between the positioning block 120 and the notch 250. It should be noted that as long as the user does not exert too much force during the rotation process, and regardless of whether the positioning block 120 is rotated excessively, in this application, the setting of the blocking block 270 is not limited.

[0051] Preferably, reference Figure 5 In one embodiment, the outer circumferential side of the mounting end 110 is provided with an external thread 160, and the external thread 160 is used for the lens assembly to be separately threaded and externally mounted on some photographic equipment. It should be noted that the external thread 160 expands the external connection method of the lens assembly 100. In this application, whether the external thread 160 is provided or not is not limited, and the mounting end 110 includes but is not limited to threaded external connection.

[0052] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An external lens, characterized in that: include: A lens assembly having an axial direction and a circumferential direction around the axial direction, wherein the lens assembly has a mounting end along one side of the axial direction, and the mounting end is provided with a plurality of positioning blocks spaced apart along the circumferential direction; A lens frame adapted for a camera assembly of an electronic device and having a first end and a second end arranged opposite to each other along the axial direction, wherein the first end is provided with a mounting groove for limiting the mounting end, and the inner side wall of the mounting groove is provided with a plurality of limiting blocks spaced along the circumferential direction, and a notch is formed between two adjacent limiting blocks to allow the positioning block to enter and exit; A glass bead is provided on the end surface of one of the mounting end and the first end, and a glass bead groove is provided on the end surface of the other end. When the positioning block enters the mounting groove through the notch and rotates in the mounting groove until the positioning block and the notch are offset by a preset angle, the glass bead is aligned and embedded in the glass bead groove.

2. The external lens according to claim 1, characterized in that: There are multiple glass bead grooves, which are spaced apart along the circumferential direction. When the positioning block and the notch are staggered at two different preset angles, the glass beads are embedded in two different glass bead grooves.

3. The external lens according to claim 1, characterized in that: The number of the mounting grooves is multiple and arranged at intervals, the number of the glass bead is one and is arranged on the end surface of the first end; the glass bead groove radially extends around the circumferential center axis of the lens assembly to form a slide groove, and when the mounting end is installed in different mounting grooves, the glass bead is limited to different length positions of the slide groove.

4. The external lens according to claim 1, characterized in that: The number of the mounting grooves is multiple and arranged at intervals, the number of the glass bead is one and is arranged on the end surface of the first end, and the straight-line distance between the glass bead and the central axis of each of the mounting grooves is equal; the straight-line distance between the glass bead groove and the central axis of the lens assembly is equal to the straight-line distance between the glass bead and the central axis of the mounting groove.

5. The external lens according to claim 1, characterized in that: The external lens includes an elastic pad, which is arranged between the first end and the mounting end, and the elastic pad accumulates and releases elastic force along the axial direction; when the positioning block and the notch are staggered by a preset angle, the elastic force released by the elastic pad can further enhance the abutment force between the positioning block and the limit block.

6. The external lens according to claim 5, characterized in that: The end surface of the first end is provided with a receiving groove, and the elastic pad is partially embedded in the receiving groove; the number of the elastic pads and the receiving grooves is multiple and one-to-one corresponding, and the elastic pads are distributed on the end surface of the first end at circumferential intervals around the opening of the installation groove.

7. The external lens according to claim 5, characterized in that: The limit block extends radially inwardly along the mounting groove and is connected to the first end. A surface of the limit block on one side facing the mounting end is smoothly connected to an end surface of the first end. The elastic pad is arranged on a side of the limit block facing the mounting end.

8. The external lens according to claim 1, characterized in that: The end surface of the mounting end is provided with a mounting column protruding along the axial direction, and the positioning block is radially extended outward from the end of the mounting column. Along the axial direction, the positioning block and the end surface of the mounting end are spaced apart from each other to form an annular clamping groove. When the positioning block rotates in the mounting groove, the limit block is clamped in the annular clamping groove.

9. The external lens according to claim 1, characterized in that: The lens frame includes a blocking block, which protrudes from the side of the limit block facing away from the lens assembly. The positioning block can be rotated in the installation groove until the positioning block abuts against the blocking block to stabilize the positioning block and the notch so as to rotate to a maximum preset angle.

10. A photographing device, characterized in that: include: An electronic device with a protruding camera assembly on the back; According to any one of claims 1 to 9, the second end is adapted to be mounted on the camera assembly, and the lens of the camera assembly is opposite to the mounting slot.

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