阅读说明：本技术 一种遮光片、镜头组件及其组装工艺 (Shading sheet, lens assembly and assembling process thereof ) 是由 胡德忠 吴俊甫 邹海荣 于 2020-03-24 设计创作，主要内容包括：本申请公开了一种遮光片、镜头组件及其组装工艺,包括：主体件,呈圆环形,主体件具有两个相对的圆环面；导磁体,具有磁吸性,导磁体设于圆环面。本申请提供一种遮光片、镜头组件及其组装工艺,该遮光片包括主体件以及导磁体。导磁体具有磁吸性,且导磁体设于主体件的圆环面上。本申请通过在遮光片上设置导磁体,使遮光片能够被磁力所吸附,这样,在遮光片的组装过程中,就可以通过磁力的吸附作用来对遮光片进行吸附、固定以及定位。从而就可以避免遮光片在组装时受外界环境影响或受静电影响而发生偏移,防止出现偏光片装偏或漏装的情况,提升了镜头组件的成像质量。(The application discloses anti-dazzling screen, camera lens subassembly and assembly process thereof includes: the main body part is in a ring shape and is provided with two opposite ring surfaces; the magnetizer has magnetic attraction and is arranged on the ring surface. The application provides a shading sheet, a lens assembly and an assembling process thereof. The magnetizer has magnetic attraction, and the magnetizer is arranged on the circular ring surface of the main body part. This application makes the anti-dazzling screen can be adsorbed by magnetic force through set up the magnetizer on the anti-dazzling screen, like this, in the equipment process of anti-dazzling screen, just can adsorb, fix and fix a position the anti-dazzling screen through the adsorption effect of magnetic force. Therefore, the light-shielding sheet is prevented from being influenced by the external environment or static electricity to deviate during assembly, the polarizer is prevented from being installed in a deviating or neglected installation manner, and the imaging quality of the lens assembly is improved.)

1. A light-blocking sheet, comprising:

the main body part is in a ring shape and is provided with two opposite ring surfaces;

the magnetizer has magnetic attraction, and the magnetizer is arranged on the ring surface.

2. The shade of claim 1,

one of the circular ring surfaces of the main body part is provided with the magnetizer; or

The two circular ring surfaces of the main body part are provided with the magnetizers.

3. The shade of claim 1,

the magnetizer is powdery, and the magnetizer is arranged on the ring surface.

4. The shade of claim 1,

the magnetizer is in a sheet shape and is embedded in the annular surface.

5. The shade of claim 1,

the magnetizer is arranged in the main body part in a penetrating way, and two end faces of the magnetizer are respectively parallel and level with the two circular ring surfaces.

6. The shade of claim 1,

the magnetizer is annular and is arranged around the center of the main body part.

7. The shade of claim 1,

the magnetizer is provided with a plurality of magnetizers, and each magnetizer is symmetrically arranged around the center of the main body part.

8. The shade of claim 1,

the body member has a dimension in a range of 0.2mm to 1mm in a radial direction along the body member.

9. A lens assembly, comprising:

a lens barrel;

the light-shielding sheet according to any one of claims 1 to 8, wherein the light-shielding sheet is disposed in the lens barrel.

10. The lens assembly of claim 9, further comprising:

a plurality of lenses, each of which is stacked in the lens barrel;

the shading sheet is arranged between two adjacent lenses.

11. A lens assembly assembling process is characterized by comprising the following steps:

moving the shading sheet to a position to be assembled in the lens barrel;

and adsorbing the light shielding sheet by adopting magnetic force so as to pre-fix the light shielding sheet at the position to be assembled.

12. The lens assembly assembling process of claim 11, further comprising, before the step of moving the light-shielding sheet to a position to be assembled within the lens barrel, the steps of:

arranging a magnetic element on the assembling tray at a position corresponding to the position to be assembled;

and fixing the lens barrel on the assembly tray.

Technical Field

The application relates to the technical field of optical elements, in particular to a shading sheet, a lens assembly and an assembling process of the lens assembly.

Background

In recent years, in order to meet the increasing demands for photographing and imaging, a lens assembly is integrated into portable electronic devices such as digital cameras, video cameras, and mobile phones. The lens assembly generally includes a light shielding sheet for adjusting light and shielding stray light. Along with the increase of the miniaturization trend of electronic equipment, the size of the lens component in the prior art is smaller and smaller, and the size of the shading sheet is reduced, so that the quality of the shading sheet is extremely light, the positioning is difficult, and the deviation is easy to occur due to the influence of the external environment. In addition, the material of the light shielding sheet is easy to generate static electricity, and the light shielding sheet is also easy to be influenced by the static electricity to generate deviation in the assembling process. This will bring great inconvenience to the equipment of lens subassembly, the condition that the anti-dazzling screen dress is inclined to one side even neglected loading appears easily, has influenced the imaging quality of lens subassembly.

Disclosure of Invention

The application provides a lens-shading sheet, lens subassembly and assembly process thereof can avoid the lens-shading sheet skew takes place when the equipment, prevents the condition that the polaroid dress is partially inclined or neglected loading from appearing, has promoted the imaging quality of lens subassembly.

According to an aspect of the present application, there is provided a light-shielding sheet including:

the main body part is in a ring shape and is provided with two opposite ring surfaces;

the magnetizer has magnetic attraction and is arranged on the ring surface. This design can be adsorbed, fixed and fix a position the anti-dazzling screen through the adsorption of magnetic force, avoids the anti-dazzling screen to take place the skew when the equipment, has just also promoted the imaging quality of lens subassembly.

According to some embodiments, one of the circular ring surfaces of the body member is provided with a magnetic conductor; or

Two ring surfaces of the main body part are both provided with magnetizers. Can select above two kinds of modes according to the user demand of difference in this design, be equipped with the magnetizer at one of them ring surface of main part spare, can reduce the production, the processing degree of difficulty of anti-dazzling screen, reduce overall cost. And two ring surfaces of the main body part are provided with magnetizers, so that the assembling process of the light shielding sheet can be simplified, the assembling efficiency is improved, and the light shielding sheet is more firmly fixed.

According to some embodiments, the magnetizer is in a powder shape, and the magnetizer is disposed on the circular ring surface. This design can make the magnetizer firmly adhere to on the torus to the magnetizer is more even in the distribution on the torus, also can occupy bigger area on the torus simultaneously.

According to some embodiments, the magnetizer is in a shape of a sheet, and the magnetizer is embedded in the circular ring surface. This design can improve the roughness of anti-dazzling screen on the torus, avoids influencing the equipment of follow-up part or subassembly in the camera lens subassembly because of the arch on the torus.

According to some embodiments, the magnetizer is disposed through the body member, and two end surfaces of the magnetizer are flush with the two annular surfaces respectively. This design can improve the roughness of anti-dazzling screen on the torus equally to a processing just can make all be equipped with the magnetizer on two tories, and the position symmetry of the magnetizer on two tories guarantees more easily, is favorable to the equipment of anti-dazzling screen.

According to some embodiments, the magnetic conductor is annular in shape and is arranged around the center of the body member. The design can ensure that the whole stress of the shading sheet is vertical to the bearing surface of the shading sheet, so that the shading sheet can be prevented from deviating, and the fixing firmness of the shading sheet is increased.

According to some embodiments, the number of the magnetic conductors is plural, and each of the magnetic conductors is arranged symmetrically around the center of the main body member. The design can also enable the whole stress of the shading sheet to be vertical to the bearing surface of the shading sheet, so that the shading sheet is prevented from deviating, the fixing firmness of the shading sheet is increased, and the shape of the magnetizer is not limited.

According to some embodiments, the body member has a dimension in the range of 0.2mm to 1mm in a radial direction along the body member. The design can further reduce the size of the light-shielding sheet to be suitable for the lens assembly with smaller size on the premise of avoiding the assembly deviation or neglected assembly caused by the deviation of the light-shielding sheet.

According to a second aspect of the present application, there is also provided a lens assembly including:

a lens barrel;

and the light shielding sheet is arranged in the lens barrel. After the lens assembly in the design is assembled, the condition that the polaroid is installed in a biased mode or is not installed in a neglected mode cannot occur, and the imaging quality of the lens assembly is improved.

According to some embodiments, further comprising:

a plurality of lenses, each lens being stacked in the lens barrel;

wherein, the shading sheet is arranged between two adjacent lenses. The lens barrel has the advantages that the lens can be firmly fixed in the lens barrel, the lens and the lens are convenient to assemble, the condition that the polaroid is installed in an inclined mode or is not installed in an inclined mode can be avoided, and the imaging quality of the lens assembly is improved.

According to a third aspect of the present application, there is also provided a lens assembly assembling process, including the steps of:

moving the shading sheet to a position to be assembled in the lens barrel;

and the magnetic force is adopted to adsorb the shading sheet so as to pre-fix the shading sheet at the position to be assembled. By adopting the assembling process, the condition of polarizing plate deviation or neglected installation can not occur, and the imaging quality of the lens component is improved.

According to some embodiments, before the step of moving the light-shielding sheet to the to-be-assembled position within the lens barrel, the method further comprises the steps of:

arranging a magnetic element on the assembly tray at a position corresponding to the position to be assembled;

the lens barrel is fixed to the assembly tray. The design can lead the two parts of the light shading sheet at the two sides of the central axis of the lens cone to be subjected to magnetic force with the same size and direction, thus leading the light shading sheet to be completely fixed at the position to be assembled without deviation or overturn.

The application provides a shading sheet and camera lens subassembly, this shading sheet includes main part and magnetizer. The magnetizer has magnetic attraction, and the magnetizer is arranged on the circular ring surface of the main body part. This application makes the anti-dazzling screen can be adsorbed by magnetic force through set up the magnetizer in the anti-dazzling screen, like this, in the equipment process of anti-dazzling screen, just can adsorb, fix and fix a position the anti-dazzling screen through the adsorption effect of magnetic force. Therefore, the light-shielding sheet is prevented from being influenced by the external environment or static electricity to deviate during assembly, the polarizer is prevented from being installed in a deviating or neglected installation manner, and the imaging quality of the lens assembly is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of a prior art lens assembly with an offset anti-glare sheet;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

FIG. 3 is a cross-sectional view of a prior art lens assembly with missing lens;

FIG. 4 is an enlarged partial schematic view of FIG. 3;

fig. 5 is a schematic view of an overall structure of a light-shielding sheet in an embodiment of the present application;

fig. 6 is a schematic view of an overall structure of a light-shielding sheet in another embodiment of the present application;

fig. 7 is a sectional view of the entire structure of the lens assembly in the embodiment of the present application in an exploded state;

FIG. 8 is a flow chart of a lens assembly process in one embodiment of the present application;

FIG. 9 is a flow chart of a lens assembly process in another embodiment of the present application;

fig. 10 is a sectional view of the lens assembly of the present embodiment when assembled; wherein, the shading sheet is adsorbed on the suction nozzle and moves along with the suction nozzle;

fig. 11 is a sectional view of the lens assembly of the present embodiment when assembled; the lens barrel comprises a lens barrel, a lens, a shading sheet and a lens holder, wherein the shading sheet is moved to a position to be assembled in the lens barrel;

fig. 12 is a sectional view of the lens assembly of the present embodiment when assembled; wherein, the magnetic element absorbs the shading sheet at the position to be assembled;

fig. 13 is a sectional view of the lens assembly of the present embodiment when assembled; and the lens in the lens assembly is completely fixed after the lens is assembled.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the prior art, the size of the lens assembly is smaller and smaller, and the size of the anti-dazzling screen is reduced, so that the anti-dazzling screen is extremely light in weight, difficult to position and easy to be affected by the external environment to deviate. In addition, the material of the light shielding sheet is easy to generate static electricity, and the light shielding sheet is also easy to be influenced by the static electricity to generate deviation in the assembling process. This will bring great inconvenience to the equipment of lens subassembly, the condition that the anti-dazzling screen dress is inclined to one side even neglected loading appears easily, has influenced the imaging quality of lens subassembly. As shown in fig. 1 to fig. 2, one side of the light-shielding sheet 100 'is shifted toward the center direction of the lens barrel, and the effective light ray a required for imaging by the lens assembly enters the lens assembly along the arrow direction, and at this time, the light-shielding sheet 100' shields the effective light ray a, which affects the normal imaging of the lens assembly. As shown in fig. 3 to 4, the light-shielding sheet 100' is shifted toward the outside of the lens barrel or is neglected, at this time, the effective light ray a required for imaging of the lens assembly and the stray light B affecting imaging both enter the lens assembly along the arrow direction, so that the stray light B cannot be normally shielded, resulting in a large defect in imaging of the lens assembly.

In order to solve the above technical problem, please refer to fig. 5 to 6, an embodiment of the present application provides a light-shielding sheet 100, in which the light-shielding sheet 100 includes a main body 110 and a magnetizer 120. The light shielding sheet 100 is a member for adjusting the intensity of light and shielding stray light in the lens assembly 10. The shape and size of the light-shielding sheet 100 can be adjusted according to the change of the lens assembly 10.

The main body 110 is a main functional part of the light shielding sheet 100, and the main body 110 is circular. The circular ring-shaped body 110 is formed by forming a central hole 112 on a circular substrate, which is concentric with the substrate, and the size of the central hole 112 is adjusted according to the environment of the light-shielding sheet 100, so as not to block the effective light required for imaging in the lens assembly 10. Thus, the body member 110 has several exposed surfaces: an outer circumferential surface 113 of the outer sidewall of the substrate, an inner circumferential surface 114 at the central hole 112, and two opposing circular ring surfaces 111 of the surface of the body member 110. To meet the functional requirements of the light-shielding sheet 100, the main body 110 is usually made by adding a light-shielding material such as carbon powder to a transparent optical material such as glass or synthetic resin. In practical applications, the material commonly used in the synthetic resin is PET (Polyethylene terephthalate), which has high transparency, smooth surface, good glossiness, and good mechanical properties, and is beneficial to processing and using the main body 110.

The magnetizer 120 is a critical component for preventing the light-shielding sheet 100 from shifting during assembly, and the magnetizer 120 has magnetic attraction. Magnetic attraction, as the name implies, refers to a property that can be attracted by magnetic force. The magnetizer 120 is disposed in the light-shielding sheet 100, so that the light-shielding sheet 100 can be attracted by magnetic force, which is convenient for positioning the light-shielding sheet 100. Meanwhile, the magnetizer 120 may also increase the weight of the light-shielding sheet 100, so that the light-shielding sheet 100 is not easily affected by static electricity to generate unnecessary displacement during assembly, thereby preventing the light-shielding sheet 100 from shifting during assembly. The magnetizer 120 is disposed on the circular ring surface 111. As described above, the surface of the body 110 has two opposite circular rings 111, and the magnetic conductor 120 is disposed on the circular rings 111, on one hand, the circular rings 111 are more flat and have a larger surface area relative to the outer circumferential surface 113 and the inner circumferential surface 114 of the body 110, thereby facilitating the disposition of the magnetic conductor 120. Also, when the magnetic conductor 120 is attracted by the magnetic force, it is easier to keep the body member 110 stable. On the other hand, the circular ring surface 111 is also a bearing surface for the light-shielding sheet 100 to contact with other components after the assembly is completed, and the magnetizer 120 is disposed on the circular ring surface 111, so that the main body 110 can be fixed more firmly by the absorption of the magnetic force on the magnetizer 120, and the light-shielding sheet 100 is further prevented from shifting.

The type, material, shape, size, etc. of the magnetizer 120 may be various, and the magnetizer 120 may be any magnetizer that can be attracted by magnetic force, which is not limited herein, and meets the requirements of the embodiments of the present application. The connection and fixation manner between the magnetizer 120 and the circular ring surface 111 of the main body 110 is different according to the type of the magnetizer 120, and the connection manners such as bonding, screwing, welding, and integral molding, which are commonly used in the art, are all within the selection range of the embodiments of the present application.

The embodiment of the application enables the light-shielding sheet 100 to be adsorbed by magnetic force by arranging the magnetizer 120 in the light-shielding sheet 100, so that the light-shielding sheet 100 can be adsorbed, fixed and positioned by the adsorption effect of the magnetic force in the assembling process of the light-shielding sheet 100. Therefore, the light-shielding sheet 100 can be prevented from being influenced by the external environment or static electricity to generate deviation during assembly, the condition of the polarizer being installed in a deviated or neglected installation is prevented, and the imaging quality of the lens assembly 10 is improved.

In the assembling process of the lens assembly 10, the circular ring surface 111 of the main body 110 is also a bearing surface for the light-shielding sheet 100 to contact with other components after the assembling process is completed, and by changing the assembling direction of the light-shielding sheet 100, both circular ring surfaces 111 of the main body 110 can be used as the bearing surface. The fixing of the light-shielding sheet 100 can be well realized by arranging the magnetizer 120 on the circular ring surface 111 as the bearing surface. Thus, in one embodiment, one of the toroidal surfaces 111 of the body member 110 is provided with a magnetic conductor 120. When the light-shielding sheet 100 is assembled, the assembling direction of the light-shielding sheet 100 can be adjusted, and the annular surface 111 provided with the magnetizer 120 can be used as a bearing surface. In other embodiments, two circular rings 111 of the main body 110 may be provided with magnetic conductors 120. Thus, when assembling the shade 100, the step of adjusting the assembling direction can be omitted, and the assembling requirement can be satisfied with any one of the circular ring surfaces 111 of the main body 110 as a bearing surface. In the actual production and processing processes, the two modes can be selected according to different use requirements, and the magnetizer 120 is arranged on one of the circular ring surfaces 111 of the main body part 110, so that the production and processing difficulties of the light-shielding sheet 100 can be reduced, and the overall cost is reduced. The two circular ring surfaces 111 of the main body 110 are provided with the magnetizers 120, so that the assembling process of the light shielding sheet 100 can be simplified, the assembling efficiency can be improved, and the light shielding sheet 100 can be fixed more firmly.

In order to make the distribution of the magnetizer 120 on the circular ring surface 111 more uniform and occupy a larger area on the circular ring surface 111, in an embodiment, the magnetizer 120 is in a powder shape, and the magnetizer 120 is disposed on the circular ring surface 111. The powder generally refers to an aggregate of discrete particles having a size of less than 1mm, and the particle size of the powder is not further specifically limited in this embodiment. There are various methods for preparing the powdered magnetizer 120, for example, a mechanical pulverization method, an electrolysis method, an atomization method, a reduction method, and other physical or chemical methods may be used, and the method may be flexibly selected according to the material of the magnetizer 120 itself. The powder magnetizer 120 may be coated on the circular ring surface 111 to form a layered structure, so as to achieve a fixed connection with the body member 110. In order to increase the connection firmness of the magnetizer 120, additives such as a plasticizer, a curing agent, an adhesive and the like may be added to the powder magnetizer 120, and the magnetizer 120 may be firmly attached to the annular surface 111 by heat treatment and other processes. The powdered magnetic conductor 120 may also be directly mixed into the raw material for manufacturing the body member 110. As described above, the main body 110 is made of transparent optical material such as glass or synthetic resin, and carbon powder is added thereto, and in this case, the powder-shaped magnetizer 120 may be further added to the optical material. Thus, the powder-shaped magnetic conductors 120 are present in the whole structure of the main body 110, and the distribution density of the magnetic conductors 120 increases as the number of the magnetic conductors 120 added increases. In this case, the light shielding sheet 100 is simpler in manufacturing process, and the body member 110 and the magnetic conductor 120 are more closely arranged.

In order to improve the flatness of the light shielding plate 100 on the circular ring surface 111 and avoid the protrusion on the circular ring surface 111 from affecting the assembly of the subsequent components or assemblies in the lens assembly 10, in one embodiment, the magnetic conductor 120 is sheet-shaped, and the magnetic conductor 120 is embedded in the circular ring surface 111. The sheet shape generally refers to an object whose dimension in one direction is much smaller than that in the other directions, that is, the thickness dimension of the sheet-shaped magnetic conductor 120 is much smaller than that in the other directions, and the thickness dimension of the sheet-shaped magnetic conductor 120 is not further specifically limited in this embodiment. The sheet-shaped magnetic conductor 120 can be obtained by pressing. In this embodiment, for convenience of processing, the sheet-shaped magnetic conductor 120 with a circular cross section is adopted, and in other embodiments, the cross section of the sheet-shaped magnetic conductor 120 may be in various irregular patterns or regular patterns. The magnetizer 120 is embedded in the circular ring surface 111, so that the magnetizer 120 can partially or even completely coincide with the main body part 110 in the direction perpendicular to the circular ring surface 111, the protruding degree on the circular ring surface 111 is reduced, and the leveling degree of the shading sheet 100 on the circular ring surface 111 is also improved.

In other embodiments, the magnetic conductor 120 may be disposed through the main body 110, and two end surfaces of the magnetic conductor 120 are flush with the two annular surfaces 111, respectively. The effect of reducing the degree of protrusion on the circular ring surface 111 and improving the flatness of the light-shielding sheet 100 on the circular ring surface 111 can also be achieved. At this time, in order to reduce the damage degree to the structure of the main body member 110 and also reduce the processing difficulty in inserting the magnetic conductor 120 into the main body member 110, the magnetic conductor 120 may be cylindrical, and the side surface of the cylinder is embedded into the main body member 110. At this time, the height dimension of the cylinder is equal to the thickness dimension of the body member 110, and one bottom surface of the cylinder is flush with one circular surface 111 of the body member 110, and the other bottom surface is flush with the other circular surface 111 of the body member 110. In this embodiment, the two circular ring surfaces 111 can be provided with the magnetizers 120 by one-time processing, and the position symmetry of the magnetizers 120 on the two circular ring surfaces 111 is easier to be ensured, which is beneficial to the assembly of the light-shielding sheet 100. In other embodiments, the height dimension of the cylindrical magnetic conductor 120 may be smaller than the thickness dimension of the body member 110, so that the magnetic conductor 120 is immersed in the body member 110, and the appearance integrity of the outer surface of the body member 110 is maintained.

The arrangement position of the magnetizer 120 on the circular ring surface 111 directly affects the fastening degree of the light shielding sheet 100 in the subsequent assembling process. Thus, in one embodiment, the shape of the magnetic conductor 120 is annular, in which case the magnetic conductor 120 is arranged around the center of the body member 110. Since the body member 110 is circular, the center of the body member 110 is at the center of the central hole 112. Thus, during the assembly process of the light-shielding sheet 100, the magnetic force for attracting the light-shielding sheet 100 is distributed symmetrically about its center, so that the whole force applied to the light-shielding sheet 100 is perpendicular to its bearing surface, thereby preventing the light-shielding sheet 100 from shifting and increasing the fixing firmness of the light-shielding sheet 100. In order not to block the light that should pass through the central hole 112, the magnetizer 120 may be configured as a circular ring centered at the center of the central hole 112. Moreover, the inner circle of the magnetizer 120 should coincide with the inner circumferential surface 114 of the main body 110, or the inner circle radius of the magnetizer 120 should be smaller than the inner circle radius of the main body 110, and the outer circle of the magnetizer 120 should not exceed the outer circumferential surface 113 of the main body 110, and the specific size can be adjusted according to the use requirement.

In other embodiments, the number of the magnetic conductors 120 may be multiple, and each magnetic conductor 120 is symmetrically arranged around the center of the main body 110. Similarly, during the assembly of the light-shielding sheet 100, the magnetic force for attracting the light-shielding sheet 100 is distributed symmetrically about the center of the light-shielding sheet 100, so that the whole force applied to the light-shielding sheet 100 is perpendicular to its bearing surface, thereby preventing the light-shielding sheet 100 from shifting and increasing the fixing firmness of the light-shielding sheet 100. In this case, the shape of the magnetic conductor 120 is not limited to the circular ring shape, and may be any other shape. The plurality of magnetic conductors 120 are distributed in an annular array on any circumference between the inner circumferential surface 114 and the outer circumferential surface 113 of the body member 110.

Because the anti-dazzling screen 100 in this application embodiment adsorbs, fixes and fixes a position anti-dazzling screen 100 through the adsorption of magnetic force in the assembling process, the anti-dazzling screen 100 in this application embodiment can not appear because the size is little, the quality is light and the location difficulty that leads to, easily receives external environment influence and takes place the problem of skew. Thus, the size of the light-shielding sheet 100 can be further reduced to be suitable for the smaller-sized lens assembly 10. For example, in one embodiment, the body member 110 has a size ranging between 0.2mm and 1mm in a radial direction along the body member 110.

In order to enable the magnetizer 120 to be firmly adsorbed by the magnetic force, the material of the magnetizer 120 includes at least one of iron, cobalt, and nickel. Iron, cobalt and nickel are ferromagnetic metals, and ferromagnetism refers to the magnetic state of a material, with spontaneous magnetization. They are magnetized by an external magnetic field, and even if the external magnetic field disappears, they still have magnetism while maintaining their magnetized state, i.e., a so-called spontaneous magnetization phenomenon. Thus, the different light-shielding sheets 100 can be attracted and fixed to each other by magnetism, which is beneficial for assembling the different light-shielding sheets 100 in the lens assembly 10.

Referring to fig. 7, an embodiment of the present invention further provides a lens assembly 10, where the lens assembly 10 includes a lens barrel 200 and at least one light-shielding sheet 100. The light shielding sheet 100 is disposed in the lens barrel 200. The number of the light-shielding sheets 100 in the lens assembly 10 and the installation position thereof are not uniquely determined, and may vary depending on the usage scenario and the function of the lens assembly 10. Fig. 7 is a cross-sectional view of the overall structure of the lens assembly 10 in an exploded state in one instance only, and many other instances are possible with the structure of the lens assembly 10. For example, in one embodiment, the lens assembly 10 includes a plurality of lenses 300 stacked in the lens barrel 200, and the light-shielding sheet 100 is disposed between two adjacent lenses 300. In other embodiments, the lens assembly 10 further includes other optical elements such as a lens 300 for adjusting light, a spacer ring 400 for adjusting the distance between two adjacent lenses 300, and in this case, the light shielding sheet 100 may be disposed between the lens 300 and the lens 300, and between the lens 300 and the spacer ring 400. The light-shielding sheets 100 can be attracted by magnetic force during the assembly process, so that the condition that the polarizer is installed in a biased or neglected installation mode after the lens assembly 10 is assembled is avoided, and the imaging quality of the lens assembly 10 is improved.

Referring to fig. 8, an assembly process of the lens assembly 10 is further provided in the embodiment of the present application, including the following steps:

s102, moving the light shielding sheet 100 to a position to be assembled in the lens barrel 200.

There are various ways to move the shade 100. In a conventional manner, the gobo 100' may be held by a holder, and the holder may be released after moving to the position to be assembled, or as shown in fig. 10 to 11, the gobo 100 may be sucked by a suction nozzle 600, the suction nozzle 600 may be released after moving to the position to be assembled, and so on. Since the light-shielding sheet 100 in the embodiment of the present application is provided with the magnetizer 120, which can be attracted by magnetic force, in this embodiment, the light-shielding sheet 100 can be attracted by magnetic force, for example, the magnet is used to attract the light-shielding sheet 100, and after moving to the position to be assembled, the magnet and the light-shielding sheet 100 are changed from surface contact to point contact by external intervention, so that the magnetic force of the magnet to the light-shielding sheet 100 is not enough to attract the light-shielding sheet 100, and the light-shielding sheet 100 can be dropped to the position to be assembled.

And S104, adsorbing the light shielding sheet 100 by adopting magnetic force so as to pre-fix the light shielding sheet 100 at the position to be assembled.

Since the magnetizer 120 is disposed in the light-shielding sheet 100 in the embodiment of the present application, the light-shielding sheet 100 can be attracted by magnetic force. Therefore, the light-shielding sheet 100 may be attracted using a magnetic force. Referring to fig. 12 to 13, the magnetic force may be generated in various ways, for example, the magnetic element 700 is directly used to adsorb the light shielding sheet 100, which occupies a small space and is low in cost. Or an electromagnetic field is arranged at the position to be assembled, the shading sheet 100 is adsorbed by the adsorption effect of the electromagnetic field on the magnetizer 120, the strength of the magnetic force generated by the electromagnetic field can be easily changed, and the use is more convenient. Other components or assemblies of the lens assembly 10 may be assembled by pre-fixing the gobo 100 in the position to be assembled. By adopting the assembling process, the condition of polarizing plate assembling deviation or neglected assembling can not occur, and the imaging quality of the lens component 10 is improved.

Before step S102, the method further includes the following steps:

the magnetic member 700 is provided on the assembly tray 500 at a position corresponding to a position to be assembled, and the magnetic member 700 is symmetrical with respect to the first plane. In this embodiment, the magnetic element 700 is used to attract the light shielding sheet 100. The magnetic element 700 occupies a small space and can be directly fixed on the assembly tray 500 at a position corresponding to the position to be assembled. And the shape of the magnetic element 700 is symmetric about a first plane. Thus, the magnetic element 700 can generate a magnetic field symmetrical about the first plane, and can generate a uniform magnetic force action on the light-shielding sheet 100. The lens barrel 200 is fixed to the assembly tray 500 with the central axis of the lens barrel 200 in the first plane. When the gobo is assembled to the to-be-assembled position in the lens barrel 200, the two portions on both sides of the central axis of the lens barrel 200 are subjected to the same magnetic force in the same magnitude and direction, so that the gobo 100 is completely fixed to the to-be-assembled position without being shifted or turned over.

In another embodiment, referring to fig. 9 to 13, the assembling process of the lens assembly 10 specifically includes the following steps:

s202, arranging the magnetic element 700 on the assembly tray 500 at a position corresponding to a position to be assembled, the magnetic element 700 being symmetrical about the first plane.

S204, fixing the lens barrel 200 to the assembly tray 500, so that the central axis of the lens barrel 200 is located in the first plane.

S206, the suction nozzle 600 or the magnetic device 700 is used to move the light shielding sheet 100 to the position to be assembled in the lens barrel 200.

S208, the magnetic element 700 is used to attract the light-shielding sheet 100, so as to fix the light-shielding sheet 100 at the position to be assembled.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those skilled in the art according to specific situations.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.