Lens assembly

Abstract

The utility model discloses a lens assembly, which comprises a metal lens barrel, a lens, a lens module and a magnet, the lens and the lens module are respectively arranged on two sides of the metal lens barrel, and the magnet is arranged on one side of the metal lens barrel close to the lens and is in contact with the metal lens barrel. The lens barrel of the lens assembly is the metal lens barrel, the magnet is installed on the metal lens barrel, the magnet is in contact with the metal lens barrel, the metal lens barrel can be equivalent to a magnetic conductive sheet and can play a magnetic conductive role, and leakage flux of the end face, in contact with the metal lens barrel, of the magnet can form a complete magnetic conductive loop through the metal lens barrel. According to the lens assembly, the magnetic flux leakage of the magnet can be greatly reduced, the magnetic force intensity of the magnet is enhanced, stronger magnetic attraction force can be provided, the effect that a small magnet has large magnetic force is achieved, stronger magnetic attraction force can be achieved under the condition that the size of the magnet is not changed, the design is more compact, the overall size of the lens assembly is small, and the product competitiveness can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of camera devices, in particular to a lens assembly. Background Art

[0002] In existing small camera products, in order to adapt to relevant lens accessories and have a better user experience, small magnets are usually installed in the limited-volume lens part to play a role in fixing and positioning the accessories. For example, a privacy cover set to protect the user's privacy and security when not shooting can be fixed to the lens by the assembled small magnet to block the lens. However, due to the extremely limited space in the lens part of small camera products and the need to accommodate a very large number of components itself, the space left for the lens accessory magnet is very small, which makes the volume and magnetic adsorption area of the lens magnet small, and it is easy to have the risk of insufficient magnetic force resulting in the dropping of the accessory, restricting the accessories that the lens part can carry. And if a larger, thicker, and stronger-magnetic magnet is selected to enhance the magnetic adsorption effect of the magnet, this will inevitably increase the cost of the magnet, and at the same time increase the overall size of the product, indirectly increasing the product cost. Moreover, in consumer small camera products, users prefer small and compact products, and the increase in the overall size of the product will cause the product to lose some competitiveness. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a lens assembly that can improve the magnetic adsorption ability of a small magnet while maintaining the volume of a small camera product.

[0004] To solve the above technical problem, the utility model provides a lens assembly, including a metal lens barrel, a lens, a lens module, and a magnet. Among them, the lens and the lens module are respectively installed on both sides of the metal lens barrel, and the magnet is installed on the side of the metal lens barrel close to the lens and is in contact with the metal lens barrel.

[0005] A further technical solution of it is that: a ring-shaped placement groove is formed by inwardly recessing the circumferential surface of the side of the metal lens barrel close to the lens, and the magnet is installed in the placement groove of the metal lens barrel.

[0006] A further technical solution of it is that: the magnet is a ring-shaped magnet, and the magnetic pole polarities of the two half-rings in the ring-shaped magnet are different.

[0007] A further technical solution of it is that: the ring-shaped magnet is an integral ring-shaped magnet; or, the ring-shaped magnet is composed of a plurality of arc-shaped magnets connected end to end in sequence.

[0008] A further technical solution of it is that: the magnet includes at least two arc-shaped magnets, the arc-shaped magnets are spaced apart and distributed in the placement groove, and the magnetic pole polarities of the opposite end faces of two adjacent arc-shaped magnets are different.

[0009] A further technical solution thereof is that the metal lens barrel is made of martensitic stainless iron material.

[0010] A further technical solution thereof is that the lens module includes a PCBA and a lens connected to the PCBA, and the PCBA is mounted on the metal lens barrel in a direction where the lens faces the lens.

[0011] A further technical solution thereof is that at least one positioning hole is formed in one side of the metal lens barrel opposite to the lens module, a plug-in portion is arranged on the PCBA, and the PCBA is installed and connected to the metal lens barrel in a manner that the plug-in portion is correspondingly inserted into the positioning hole.

[0012] A further technical solution thereof is that the plug-in portion is a copper column protruding towards the metal lens barrel, and the copper columns are arranged in one-to-one correspondence with the positioning holes.

[0013] A further technical solution thereof is that the lens assembly further includes a plurality of locking screws, a plurality of locking holes are formed in the metal lens barrel, and each locking screw passes through the PCBA and is fixed in a locking hole of the metal lens barrel.

[0014] The beneficial technical effect of the present utility model is that compared with the prior art, the lens barrel of the lens assembly of the present utility model is a metal lens barrel, and a magnet is installed on one side of the metal lens barrel close to the lens. When the magnet contacts the metal lens barrel, the metal lens barrel can be equivalent to a magnetic conductive sheet and can play a role in magnetic conduction. The magnetic leakage at the end face where the magnet contacts the metal lens barrel can form a complete magnetic conduction loop through the metal lens barrel, effectively improving the magnetic circuit, greatly reducing the magnetic leakage of the magnet, enhancing the magnetic force intensity of the magnet, providing a stronger magnetic attraction force, and achieving the effect of a small magnet having a large magnetic force. It can be seen that the lens assembly of the present utility model can achieve a stronger magnetic attraction force without changing the volume of the magnet, has a more compact design, can save more space to a greater extent, makes the overall size of the lens assembly smaller, has less cost, and can enhance the product competitiveness. Description of the Drawings

[0015] Figure 1 is an exploded structural schematic diagram of a specific embodiment of the lens assembly of the present utility model.

[0016] Figure 2 is a cross-sectional schematic diagram of the lens assembly of the present utility model.

[0017] Figure 3 is Figure 1 a structural schematic diagram of another perspective of the metal lens barrel in the shown lens assembly. Detailed Embodiments

[0018] To better understand the technical content of the present utility model, the technical solution of the present utility model will be further introduced and described below in conjunction with the schematic diagrams, but not limited thereto.

[0019] Referring to Figures 1 to 3 , Figures 1 to 3 FIG. shows a specific embodiment of the lens assembly 100 of the present utility model. In the embodiment shown in the drawings, the lens assembly 100 includes a metal lens barrel 20, a lens 40, a lens module 30, and a magnet 10. Among them, the lens 40 and the lens module 30 are respectively installed on both sides of the metal lens barrel 20, and the magnet 10 is installed on the side of the metal lens barrel 20 close to the lens 40 and is in contact with the metal lens barrel 20. Preferably, in this embodiment, the metal lens barrel 20 can be made of non-magnetic iron material, and in some other embodiments, it can also be made of a metal material with good magnetic conductivity; the lens 40 can be installed on the metal lens barrel 20 by connection means such as tape or glue. For example, the lens 40 can be pasted on the metal lens barrel 20 by back glue. In the present utility model, the magnet 10 is in contact with the metal lens barrel 20, and the metal lens barrel 20 has good magnetic conductivity, which is equivalent to a magnetic conduction sheet and plays a role in magnetic conduction. The magnetic leakage at the end face where the magnet 10 is in contact with the metal lens barrel 20 can form a complete short-distance magnetic conduction loop through the metal lens barrel 20, effectively improving the magnetic circuit, greatly reducing the magnetic leakage of the magnet 10, enhancing the magnetic force intensity of the magnet 10, providing a stronger magnetic suction force without changing the volume of the magnet 10, achieving the effect of a small magnet having a large magnetic force, that is, the size of the magnet 10 can be reduced under the same magnetic force intensity, thereby reducing the magnet cost, and at the same time, more space can be saved to reduce the overall size of the lens assembly 100, making the structural design of the product more compact and more competitive.

[0020] In some embodiments, a ring-shaped placement groove 27 is formed by inward recessing of the circumferential surface on the side of the metal lens barrel 20 close to the lens 40, and the magnet 10 is installed in the placement groove 27 of the metal lens barrel 20. Preferably, in this embodiment, the magnet 10 is a ring-shaped magnet adapted to the placement groove 27, and the magnetic pole polarities of the two half-rings in the ring-shaped magnet are different (as Figure 1 shown, N and S in the figure respectively represent the magnetic poles of the magnet 10). Based on the above design, the entire ring-shaped magnet of the present utility model is magnetized by the method of half-charging, so that the magnetic pole polarities of the two half-rings in the ring-shaped magnet are different, and the two half-rings in the ring-shaped magnet can also form a magnetic circuit through the metal lens barrel 20 to further reduce the magnetic leakage of the magnet 10. It can be understood that in some other embodiments, the magnet 10 can also be a plurality of spaced arc-shaped magnets, that is, the magnet 10 can include at least two arc-shaped magnets, the arc-shaped magnets are spaced apart in the placement groove 27, and the magnetic pole polarities of the opposite end faces of adjacent two arc-shaped magnets are different, which can also further reduce the magnetic leakage of the magnet 10.

[0021] Specifically, as Figure 1 shown, in this embodiment, the annular magnet is composed of two arc magnets connected end to end, and is magnetized in a left-right half-filling manner, and the magnetic pole polarities of the two arc magnets are different. In some other embodiments, the annular magnet can be an integral annular magnet, or an annular magnet composed of three or more arc magnets connected end to end in sequence. By adopting different magnetization methods, the magnetic pole polarities of the two half-rings in the annular magnet can also be made different.

[0022] Continuing to refer to Figures 1 to 3 , in some embodiments, the lens module 30 includes a PCBA 31 and a lens 32 connected to the PCBA 31, and the PCBA 31 is mounted on the metal lens barrel 20 in the direction in which the lens 32 faces the lens 40. Specifically, in this embodiment, at least one positioning hole 21 is provided on the side of the metal lens barrel 20 opposite to the lens module 30. A plug-in portion 33 is provided on the PCBA 31 of the lens module 30, and the lens module 30 is mounted and connected to the metal lens barrel 20 in such a way that the plug-in portion 33 is correspondingly inserted into the positioning hole 21. The utility model ensures higher positioning concentricity between the lens 32 and the metal lens barrel 20 through the positioning and plugging cooperation of the plug-in portion 33 and the positioning hole 21. When in use, even if affected by dropping, the deviation between the lens 32 and the metal lens barrel 20 is small, and the lens module 30 is directly fixed on the metal lens barrel 20, which can greatly shorten the assembly dimension chain from the lens 32 to the metal lens barrel 20, making the assembly tolerance smaller, fully exerting the optical performance of the lens module 30, further improving the photographing and imaging effect of the lens assembly 100, and bringing people a better visual experience.

[0023] In the utility model, according to the installation needs, one or more positioning holes 21 can be provided. Preferably, as Figure 3 shown, in the embodiment shown in the drawings, two positioning holes 21 are provided, and the two positioning holes 21 are respectively opened at the upper and lower parts of the inner peripheral portion 26 of the metal lens barrel 20. Combining Figure 1 , in this embodiment, the plug-in portion 33 is a copper column protruding towards the metal lens barrel 20, and the copper columns are provided in one-to-one correspondence with the positioning holes 21. In the utility model, the copper columns can be welded to the PCBA 31 by SMT technology for positioning and plugging.

[0024] Furthermore, the lens assembly 100 further includes three locking screws 50. Three locking holes 22 are provided on the metal lens barrel 20, and each locking screw 50 passes through the PCBA 31 and is fixed in one of the locking holes 22. Based on the above design, the lens module 30 and the metal lens barrel 20 are fixed by the locking screws 50.

[0025] In summary, in the lens assembly of the present utility model, the metal lens barrel acts as a magnetic conductive metal and can play a magnetic conduction role, enabling the magnetic leakage at the end face where the magnet contacts the metal lens barrel to form a complete short-distance magnetic conduction loop through the metal lens barrel, effectively improving the magnetic circuit, greatly reducing the magnetic leakage of the magnet. With a limited magnet volume, the magnetic force intensity of the magnet is enhanced, achieving the effect of a small magnet having a large magnetic force, which is beneficial for carrying accessories. That is, at the same magnetic force intensity, the size of the magnet can be reduced, thereby reducing the magnet cost, and it is also convenient to accommodate the magnet in a limited lens, saving more space to reduce the overall size of the lens assembly, making the structural design of the product more compact and more competitive. Moreover, the lens assembly of the present utility model can ensure good concentricity between the lens and the metal lens barrel through the positioning and plugging cooperation of the plugging part and the positioning hole, and the lens module is directly fixed on the lens barrel, which can greatly shorten the assembly dimension chain from the lens to the lens barrel, making the assembly tolerance smaller, being beneficial to fully exert the optical performance of the lens module and bringing people a better visual experience.

[0026] The above preferred embodiments should be regarded as illustrative examples of the implementation modes of the present utility model. All technical deductions, substitutions, improvements, etc. that are identical, similar to or based on the present utility model should be regarded as within the protection scope of this patent.

Claims

1. A lens assembly, characterized in that: The lens assembly includes a metal lens barrel, a lens, a lens module and a magnet, wherein the lens and the lens module are respectively installed on both sides of the metal lens barrel, and the magnet is installed on a side of the metal lens barrel close to the lens and in contact with the metal lens barrel.

2. The lens assembly according to claim 1, wherein: The circumference of the metal lens barrel on one side close to the lens is inwardly concave to form an annular placement groove, and the magnet is installed in the placement groove of the metal lens barrel.

3. The lens assembly according to claim 1 or 2, characterized in that: The magnet is an annular magnet, and the magnetic poles of two half rings in the annular magnet are different.

4. The lens assembly according to claim 3, characterized in that: The annular magnet is an integrated annular magnet; or, the annular magnet is composed of a plurality of arc-shaped magnets connected end to end in sequence.

5. The lens assembly according to claim 2, wherein: The magnet comprises at least two arc-shaped magnets, the arc-shaped magnets are distributed in the placement slot at intervals, and the magnetic poles of the opposite end surfaces of two adjacent arc-shaped magnets are different.

6. The lens assembly according to claim 1, wherein: The metal lens barrel is made of stainless iron material.

7. The lens assembly according to claim 1, wherein: The lens module includes a PCBA and a lens connected to the PCBA, and the PCBA is installed on the metal lens barrel in a direction in which the lens faces the lens.

8. The lens assembly according to claim 7, wherein: At least one positioning hole is formed on a side of the metal lens barrel opposite to the lens module, and a plug-in portion is provided on the PCBA, and the plug-in portion is installed and connected to the metal lens barrel in a manner that the plug-in portion is correspondingly plugged into the positioning hole.

9. The lens assembly according to claim 8, wherein: The plug-in portion is a copper column protruding toward the metal lens barrel, and the copper column is arranged in a one-to-one correspondence with the positioning hole.

10. The lens assembly according to claim 8 or 9, characterized in that: The lens assembly further comprises a plurality of locking screws. The metal lens barrel is provided with a plurality of locking holes. Each of the locking screws passes through the PCBA and is fixed in a locking hole of the metal lens barrel.

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