CN111352204B

CN111352204B - Lens holder assembly, assembling method thereof, reverse-mounted lens and lens module

Info

Publication number: CN111352204B
Application number: CN201811569576.4A
Authority: CN
Inventors: 章斌; 徐杰伟; 洪铁迪
Original assignee: Yuyao Sunny Optical Intelligence Technology Co Ltd
Current assignee: Yuyao Sunny Optical Intelligence Technology Co Ltd
Priority date: 2018-12-21
Filing date: 2018-12-21
Publication date: 2023-02-03
Anticipated expiration: 2038-12-21
Also published as: CN111352204A

Abstract

A lens holder assembly, a method for assembling the same, a reverse lens and a lens module are provided. The lens base assembly comprises a lens base provided with an internal thread and a reverse-mounted lens reversely mounted on the lens base. This anti-dress formula camera lens includes: the lens cone main body is provided with an external thread, wherein the external thread of the lens cone main body can be in threaded connection with the internal thread of the lens base; at least one lens, wherein the at least one lens is assembled to the barrel body; and the dustproof piece extends outwards from the lens cone main body, is positioned below the threaded connection part between the lens cone main body and the lens base and is used for collecting dust falling from the threaded connection part.

Description

Lens holder assembly, assembling method thereof, reverse-mounted lens and lens module

Technical Field

The present invention relates to a lens module, and more particularly to a lens holder assembly, a lens module assembly method, a lens module and a lens module.

Background

Along with the development of photoelectric technology, the application of lens module is more and more wide, except digital camera, portable electronic equipment all need be equipped with the lens module like flat board, cell-phone, artificial intelligence, medical instrument, security protection, unmanned aerial vehicle etc.. In order to obtain higher imaging quality, there are more and more occasions where a variable focus lens is required to obtain a high quality image by adjusting the focal length of the lens.

As shown in fig. 1, the conventional zoom lens is usually designed as a through type, and during assembly, the zoom lens 1P is screwed from the top end of the lens holder 2P, and the bottom end of the lens holder 2P is mounted to the photosensitive element 3P, so as to assemble a zoom lens module. In the whole process of utilizing the thread to focus the lens module, dust falling protection of the thread part between the lens 1P and the lens base 2P is lost, and dust generated by thread friction is hidden in the gap of the thread in an opposite mode. Therefore, after a series of operations such as focusing, vibration and the like, the dust of the part can fall into the inner cavity of the lens base 2P, and the chip in the photosensitive assembly 3P is easily polluted, so that the image quality is poor, and the use performance of the product is influenced. Especially in some lens modules that are required for a long time in a shock and impact environment (such as a sport aerial camera lens module), the potential risk of dust fall is not manageable, and once dust fall occurs, the final performance of the product will be directly affected.

In addition, since the through-type zoom lens 1P needs to be screwed in from the top of the lens holder 2P, the size of the bottom of the zoom lens 1P cannot be larger than the size of the top opening of the lens holder 2P, so that the size of the bottom of the zoom lens 1P cannot provide a sufficient attachment area for the square filter, and the size of the filter attached to the bottom of the zoom lens 1P cannot be larger than the size of the top opening of the lens holder 2P, therefore, the square filter needs to be polished and polished into a circular filter before attaching the filter to the bottom of the zoom lens 1P to meet the size required by the lens module, which greatly increases the cost of the lens module.

Disclosure of Invention

An object of the present invention is to provide a lens holder assembly, a method for assembling the same, a lens module and a flip-chip lens, which can effectively reduce the effect of dust generated by thread friction on the lens module, and help to ensure the quality of the lens module.

Another object of the present invention is to provide a lens holder assembly, a method for assembling the same, a lens module and a flip-chip lens, which can effectively prevent thread dust by adding a dust-proof structure to the module structure.

Another object of the present invention is to provide a lens holder assembly, a method for assembling the same, a flip lens, and a lens module, wherein in an embodiment of the present invention, the bottom of the flip lens can provide a sufficient attachment area for a square filter without polishing the square filter into a circular filter, which is helpful to reduce the production cost of the lens module.

Another object of the present invention is to provide a lens holder assembly, a method for assembling the same, a flip lens and a lens module, wherein the flip lens is mounted in a lens holder by a flip method, so as to facilitate disposing a dust-proof member at the bottom of the flip lens, thereby effectively suppressing dust pollution.

Another objective of the present invention is to provide a lens holder assembly, a method for assembling the same, a flip lens, and a lens module, wherein in an embodiment of the present invention, the dust-proof groove of the flip lens can not only collect dust, but also store dust so as to prevent secondary dust pollution, which is helpful for further ensuring the quality of the lens module.

Another object of the present invention is to provide a lens holder assembly, a method of assembling the same, a flip lens, and a lens module, which do not require expensive materials or complicated structures. Therefore, the present invention successfully and effectively provides a solution, and not only provides a lens holder assembly and an assembling method thereof, as well as a flip-chip lens and a lens module, but also increases the practicability and reliability of the lens holder assembly and the assembling method thereof, as well as the flip-chip lens and the lens module.

To achieve at least one of the above and other objects and advantages, the present invention provides a lens barrel assembly including:

the lens base is provided with internal threads; and

a lens barrel, wherein the lens barrel is configured to be assembled to the lens holder in a flip-up manner, and the lens barrel comprises:

the lens barrel comprises a lens barrel body, a lens base and a lens holder, wherein the lens barrel body is provided with an external thread, and the external thread of the lens barrel body can be in threaded connection with the internal thread of the lens holder so as to form a threaded connection part between the lens barrel body and the lens holder;

at least one lens, wherein the at least one lens is assembled to the barrel body; and

and the dustproof piece extends outwards from the lens cone main body, is positioned below the threaded connection part and is used for collecting dust falling from the threaded connection part.

In an embodiment of the present invention, the dust-proof member is integrally connected to a bottom of the lens barrel body to form an annular boss on an outer circumferential surface of the lens barrel body.

In an embodiment of the present invention, the dust-proof member is coupled to a bottom of the lens barrel body to form an annular boss on an outer circumferential surface of the lens barrel body.

In an embodiment of the invention, the dust-proof member is provided with a dust-proof groove, wherein the dust-proof groove is formed by downwardly recessing from an upper end surface of the annular boss so as to correspond to the threaded connection portion.

In an embodiment of the present invention, the dust-proof member is further provided with a dust storage cavity, wherein the dust storage cavity is located at the bottom of the dust-proof slot and is communicated with the dust-proof slot for storing dust falling into the dust-proof slot.

In an embodiment of the present invention, the opening of the dust storage cavity is located on the bottom surface of the dust-proof slot, and the size of the opening of the dust storage cavity is smaller than the size of the cavity of the dust storage cavity.

In an embodiment of the present invention, the opening of the dust storage chamber is located adjacent to the outer circumferential surface of the lens barrel body.

In an embodiment of the present invention, the dust-proof member is further provided with a groove cavity with a downward opening, wherein the groove cavity is located at the top of the dust storage cavity and is located away from the outer circumferential surface of the lens barrel body.

In an embodiment of the invention, the flip-chip lens further includes an absorption layer, wherein the absorption layer is disposed on the dust-proof member and is used for absorbing dust falling to the dust-proof member.

In an embodiment of the invention, the flip-chip lens further includes an absorption layer, wherein the absorption layer is disposed in the dust-proof groove of the dust-proof member and is used for absorbing dust falling into the dust-proof groove.

In an embodiment of the present invention, the absorption layer is a glue layer with adhesiveness.

In an embodiment of the invention, the dust-proof member is a pressing ring, wherein the pressing ring is screwed with the bottom of the lens barrel body, so that an upper end surface of the pressing ring corresponds to the screwed connection.

In an embodiment of the present invention, the pressing ring is provided with a peripheral groove, wherein the peripheral groove is located at a thread start position of an upper end surface of the pressing ring to form a dust-proof groove by the combination of the peripheral groove of the pressing ring and an outer circumferential surface of the barrel body.

In an embodiment of the present invention, the external thread of the lens barrel body extends to a bottom of the lens barrel body, wherein the pressing ring is screwed with a lower portion of the external thread of the lens barrel body, and the lens base is screwed with an upper portion of the external thread of the lens barrel body.

In an embodiment of the invention, the flip-chip lens further includes a glue layer having a viscosity, wherein the glue layer is located at a joint between the pressing ring and the lens barrel body and in the peripheral groove of the pressing ring.

In an embodiment of the invention, the lens holder assembly further includes a filter element, wherein the filter element is disposed on the flip lens.

In an embodiment of the invention, the filter element is a square filter assembled to the dust-proof member of the flip lens.

According to another aspect of the present invention, there is further provided a flip-chip lens for being assembled to a lens holder in a flip-chip manner, comprising:

the lens barrel comprises a lens barrel body, a lens base and a lens barrel cover, wherein the lens barrel body is provided with an external thread and is used for being in threaded connection with the internal thread of the lens base so as to form a threaded connection part between the lens barrel body and the lens base;

and the dustproof piece extends outwards from the lens cone main body, and is positioned below the threaded connection part when the lens cone main body is in threaded connection with the lens base, and is used for collecting dust falling from the threaded connection part.

According to another aspect of the present invention, there is provided a lens module, comprising:

the photosensitive assembly comprises a circuit board and a photosensitive chip, wherein the photosensitive chip is attached to the circuit board; and

the lens barrel assembly of any one of the above, wherein the lens barrel of the lens barrel assembly is assembled to the circuit board of the photosensitive assembly, and the photosensitive chip of the photosensitive assembly is made to correspond to the flip-chip lens of the lens barrel assembly.

According to another aspect of the present invention, there is further provided a lens holder assembly assembling method characterized by comprising the steps of:

providing a reverse lens, wherein the reverse lens comprises a lens barrel body, at least one lens and a dust-proof piece, wherein the lens barrel body is provided with an external thread, the at least one lens is assembled on the lens barrel body, and the dust-proof piece extends outwards from the lens barrel body; and

and screwing the reverse-mounted lens into the external thread of the lens cone main body from the bottom end of the lens base to be in threaded connection with the external thread, wherein the dustproof piece is positioned below the threaded connection part between the lens base and the lens cone main body and is used for collecting dust falling from the threaded connection part.

In an embodiment of the invention, the method for assembling the lens holder assembly further includes the steps of:

and arranging a square optical filter on the dustproof piece of the reverse lens.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

Fig. 1 shows a schematic cross-sectional view of a lens module in the prior art.

Fig. 2 is a schematic cross-sectional view of a lens module according to a first embodiment of the invention.

Fig. 3 is an exploded view of the lens module according to the first embodiment of the invention.

Fig. 4 shows a first modified embodiment of the lens module according to the above first embodiment of the present invention.

Fig. 5 shows a second modified embodiment of the lens module according to the above first embodiment of the present invention.

Fig. 6 illustrates an assembling method of the lens module according to the above-described first embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a lens module according to a second embodiment of the invention.

Fig. 8 is an exploded view of a flip lens of the lens module according to the second embodiment of the invention.

Fig. 9 shows a first modified embodiment of the lens module according to the above second embodiment of the present invention.

Fig. 10 is a flowchart illustrating an assembling method of the flip lens according to the second embodiment of the present invention.

Fig. 11 is a flowchart illustrating an assembling method of the lens module according to the second embodiment of the invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

In the present invention, the terms "a" and "an" in the claims and the description should be understood as meaning "one or more", that is, one element may be one in number in one embodiment, and the element may be more than one in number in another embodiment. The terms "a" and "an" should not be construed as limiting the number unless the number of such elements is explicitly recited as one in the present disclosure, but rather the terms "a" and "an" should not be construed as being limited to only one of the number.

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The lens module is used as a precise electronic device and has higher sensitivity to dust pollution. Once dust falls on the photosensitive chip in the lens module, the dust has a serious influence on the imaging quality of the lens module, and further the final performance of the lens module is directly reduced greatly, so that the sealing grade requirements of the market and application scenes on the lens module are higher and higher. However, the structure of the variable-focus module is limited, and when the variable-focus module needs to be subjected to zooming operation, the lens of the variable-focus module inevitably rotates relative to the lens base, so that the sealing effect of the variable-focus module at the threaded connection between the lens and the lens base is poor, and dust enters the module through the threaded gap, so that the photosensitive chip of the lens module is polluted. Therefore, a lens module with a dustproof effect is urgently needed to solve the dustproof problem.

Referring to fig. 2 and 3, a lens module according to a first embodiment of the present invention is illustrated for having a dustproof function to prevent dust between threads from falling into the module when focusing or shaking, thereby ensuring good image quality of the lens module. Specifically, as shown in fig. 2, the lens module 1 includes a photosensitive element 10, a lens holder 20 and a flip-chip lens 30, wherein the flip-chip lens 30 is mounted on the lens holder 20 to form a lens holder assembly 2, and wherein the lens holder 20 of the lens holder assembly 2 is mounted on the photosensitive element 10 to form the lens module 1.

More specifically, as shown in fig. 2 and 3, the flip lens 30 of the lens holder assembly 2 includes at least one lens 31, a barrel body 32, and a dust-proof member 33. The at least one lens 31 is assembled in the barrel body 32. The lens barrel body 32 is provided with an external thread 320 for screwing with the internal thread 210 of the lens holder 20 to form a threaded connection 200 between the lens barrel body 30 and the lens holder 20. The dust-proof member 33 extends outward from the lens barrel body 32, is located below the threaded connection 200 between the lens barrel body 30 and the lens base 20, and is used for collecting dust falling from the threaded connection 200.

The photosensitive assembly 10 generally includes a circuit board 11 and a photosensitive chip 12, wherein the photosensitive chip 12 is attached to the circuit board 11, and the lens holder 20 is mounted on the circuit board 11 and surrounds the periphery of the photosensitive chip 12, so that the lens 31 of the flip lens 30 corresponds to the photosensitive chip 12, and the photosensitive chip 12 can receive light transmitted through the lens 31 to form an image.

It should be noted that when the lens barrel body 32 is screwed with the lens base 20, the dust-proof member 33 can collect dust falling from the screwed connection 200 only at the screwed connection 200 between the lens barrel body 32 and the lens base 20, so as to prevent the dust from falling to the photosensitive chip 12 and affecting the imaging quality of the lens module 1. Therefore, the lateral dimension of the dust-proof member 33 must be larger than the lateral dimension of the lens barrel body 32 at the external thread 320, so that the dust-proof member 33 can surround the bottom 322 of the lens barrel body 32 and correspondingly be located below the external thread 320, so as to collect dust falling from the threaded connection 200.

However, due to the existence of the dust-proof member 33, the bottom 322 of the barrel body 32 of the lens mount 30 is larger than the head 321 of the barrel body 32 of the lens mount 30 (i.e. the lens mount 30 has a shape with a large head and a small bottom), so the lens mount 30 of the present invention cannot be screwed in from the top 21 of the lens holder 20 like the conventional through lens, but can be assembled in reverse, i.e. the lens mount 30 is screwed in from the bottom 22 of the lens holder 20 to assemble the lens holder assembly.

In this first embodiment of the present invention, as shown in fig. 2 and 3, the dust-proof member 33 integrally extends outward from the bottom portion 322 of the barrel body 32 to form an annular projection 331 on the outer peripheral surface 323 of the barrel body 32, so that dust falling from the screw joint 200 is collected by the upper end surface 3311 of the annular projection 331.

Further, in order to prevent the dust falling on the dust-proof member 33 from sliding off the upper end surface 3311 of the annular boss 331, in the first embodiment of the present invention, as shown in fig. 2, the upper end surface 3311 of the annular boss 331 is recessed downward to form the dust-proof groove 330 having a U-shaped cross section, so that the dust falling on the dust-proof member 33 automatically collects on the bottom surface of the dust-proof groove 330, and thus the dust falling in the dust-proof groove 330 can be effectively prevented from sliding off the upper end surface 3311 of the annular boss 331 to the photosensitive chip 12 again to contaminate the photosensitive chip 12. In other words, the outer edge of the upper end surface 3311 of the annular boss 331 protrudes upward to form the dust-proof groove 330 having a U-shaped structure between the outer circumferential surface 323 of the barrel body 32 and the upper end surface 3311 of the annular boss 331.

Preferably, the dust-proof groove 330 is implemented as an annular groove continuously extending along the upper end surface 3311 of the annular boss 331 so as to surround the outer circumferential surface 323 of the barrel body 32 and correspond to the screw joint 200 for collecting dust falling from any portion of the screw joint 200. Of course, in other examples of the present invention, the dust-proof groove 330 may also be implemented as a plurality of strip-shaped grooves intermittently extending along the upper end surface of the annular boss, so as to ensure the self-strength of the dust-proof member 33, in order to prevent the dust-proof groove 330 from being damaged by knocking.

It should be noted that although fig. 2 and 3 and the related description illustrate the dust-proof member 33 having only one dust-proof groove 330 to clarify the features and advantages of the flip-chip lens 30 of the present invention, it can be understood by those skilled in the art that the number of the dust-proof grooves 330 disclosed in fig. 2 to 5 and the related description is only an example and does not limit the content and scope of the present invention, for example, in other examples of the flip-chip lens 30, the number of the dust-proof grooves 330 can be two or more, so as to achieve the dust-proof effect, and the present invention is not repeated herein.

In the first embodiment of the present invention, as shown in fig. 2, the lens holder assembly 2 of the lens module 1 further includes a filter element 40, wherein the filter element 40 is disposed between the photo sensor chip 12 of the photo sensor assembly 10 and the lens 31 of the flip lens 30, so that the light entering the inside of the lens module 1 from the lens 31 of the flip lens 30 can be received and photoelectrically converted by the photo sensor chip 12 after being filtered by the filter element 40, thereby improving the imaging quality of the lens module 1, for example, the filter element 40 can filter the infrared part of the light entering the inside of the lens module 1 from the flip lens 30.

It will be understood by those skilled in the art that, in different examples of the lens module 1, the filter element 40 can be implemented in different types, for example, the filter element 40 can be implemented as an infrared cut filter, a full transmission spectrum filter, and other filters or a combination of filters, for example, the filter element 40 can be implemented as a combination of an infrared cut filter and a full transmission spectrum filter, that is, the infrared cut filter and the full transmission spectrum filter can be switched to be selectively located on the photosensitive path of the photosensitive chip 12, for example, when the lens module 1 is used in a light-rich environment such as daytime, the infrared cut filter can be switched to the photosensitive path of the photosensitive chip 12 to filter the infrared rays entering the lens module 1 in the light reflected by the object, and when the lens module 1 is used in a dark environment such as night, the full transmission spectrum filter can be switched to the photosensitive path of the photosensitive chip 12 to allow the infrared rays entering the lens module 1 in the light reflected by the object to partially transmit.

Specifically, the filter element 40 is disposed on the dust-proof member 33 of the flip lens 30, so that the filter element 40 is located between the photosensitive chip 12 of the photosensitive assembly 10 and the lens 31 of the flip lens 30. For example, as shown in fig. 2, the filter element 40 is attached to the lower end surface of the annular boss 331, so that light entering the lens module 1 from the lens 31 of the flip-chip lens 30 can be received by the light sensing chip 12 after being filtered by the filter element 40.

It should be noted that, in the prior art, the through lens is limited by the size of the bottom of the lens barrel, so that the square filter has to be polished into a circular filter before being attached to the bottom of the lens barrel of the through lens. In the present invention, since the annular boss is formed by extending outward from the bottom 322 of the barrel body 32, so that the lateral dimension of the lower end surface 3312 of the annular boss 331 is certainly larger than the lateral dimension of the bottom 322 of the barrel body 32, the lower end surface 3312 of the annular boss 331 can provide a sufficient attachment area for the filter element 40, so as to attach the square filter 41 directly to the lower end surface 3312 of the annular boss 331, without performing an attachment process by polishing the square filter into a circular filter as in the conventional through-type lens, which helps to reduce the production cost of the filter element 40 (estimated that the unit price cost of the filter element 40 of the present invention can be reduced by about 15%), thereby reducing the costs of the flip lens 30 and the lens module 1.

It will be understood by those skilled in the art that although the present invention illustrates other features and advantages of the lens holder assembly 2 of the present invention with the filter element 40 attached to the dust-proof member 33, it is not intended to indicate that the filter element 40 in the lens holder assembly 2 of the present invention is limited to the dust-proof member 33 mounted to the flip-chip lens 30. For example, in other examples of the present invention, the filter element 40 of the lens holder assembly 2 may be implemented as a circular filter and directly assembled into the barrel body 32 of the flip lens 30; or the filter element 40 can also be directly attached to the photosensitive chip 12 of the photosensitive assembly 10; still alternatively, the filter element 40 may be mounted in the lens holder 20 after the lens module 30 is assembled to the lens holder 20, as long as the imaging quality of the lens module 1 can be improved by filtering.

In addition, since the lens mount 20 needs to be screwed from the bottom end 22 of the lens mount 20 in a reverse assembly manner, so that the lens mount 20 needs to be matched with the lens mount 30, the design of the lens mount 20 needs to consider the thread-up position of the internal thread 210 on the lens mount 20, the mold-drawing direction of the lens mount 20, the mold-opening manner of the lens mount 20, and the like, so as to ensure that the lens mount 20 can be assembled with the lens mount 30 in a matched manner.

It should be noted that when the lens module 1 is used, the lens module 1 is not placed upright as shown in fig. 2, but is more often placed upside down, or even placed upside down. Therefore, although the dust-proof groove 330 is designed as an annular groove having a U-shaped cross section, once the lens module 1 is placed upside down or upside down, dust falling into the dust-proof groove 330 may escape from the dust-proof groove 330 and fall onto the photosensitive chip 12 from the edge of the annular projection 331, which also causes contamination of the photosensitive chip 12.

In order to solve the above problem, as shown in fig. 4, the present invention further provides a first modified implementation of the lens module 1 according to the first embodiment, wherein the flip-chip lens 30 further includes an absorption layer 34, wherein the absorption layer 34 is disposed on the dust-proof member 33 for absorbing the dust falling to the dust-proof member 33, so as to prevent the dust falling to the dust-proof member 33 from escaping from the dust-proof member 33 to contaminate the photo-sensing chip 12. In other words, the adsorption layer 34 may be disposed on the upper end surface 3311 of the annular boss 331 for adsorbing the dust falling to the annular boss 331 so as to prevent the dust from sliding off the edge of the upper end surface 3311 of the annular boss 331 to contaminate the photosensitive chip 12.

Specifically, the adsorption layer 34 is disposed in the dust-proof groove 330 of the dust-proof member 33, and is configured to adsorb dust falling into the dust-proof groove 330, so as to prevent dust falling into the dust-proof groove 330 from escaping from the dust-proof groove 330 to contaminate the photosensitive chip 12, thereby avoiding secondary pollution, and further improving the dust-proof performance of the dust-proof member 33 in the flip-chip lens 30.

For example, the adsorption layer 34 of the dust-proof piece 33 may be, but is not limited to, implemented as a sticky glue layer, and the glue layer is disposed at the bottom of the dust-proof slot 330 by means of dispensing, so as to ensure that dust falling into the dust-proof slot 330 will be adsorbed by the adsorption layer 34 and stored and cannot escape from the dust-proof slot 330 when the lens module 1 is horizontally placed or even inverted, so as to further enhance the dust-proof effect of the dust-proof piece 33, and help ensure that the lens module 1 can maintain good imaging quality for a long time. That is, the dust-proof member 33 of the reverse lens 30 can have not only a dust-proof function but also a dust-storage function, which contributes to the maximum quality assurance of the lens module 1.

Fig. 5 shows a second variant of the lens module 1 according to the first embodiment of the present invention, wherein the dust-proof member 33 further includes a dust-storing cavity 333, wherein the dust-storing cavity 333 is located at the bottom of the dust-proof groove 330 and is communicated with the dust-proof groove 330, so that the dust falling into the dust-proof groove 330 can enter the dust-storing cavity 333 to be stored, so as to prevent the dust falling into the dust-proof groove 330 from escaping from the dust-proof groove 330.

Specifically, as shown in fig. 5, the opening 3330 of the dust storage cavity 333 is located at the bottom surface of the dust-proof slot 330, and the opening size of the dust storage cavity 333 is smaller than the cavity size of the dust storage cavity 333, that is, the dust storage cavity 333 has a structure with a small opening and a large cavity, so that dust falling into the dust-proof slot 330 can easily enter the dust storage cavity 333, but dust entering the dust storage cavity 333 is difficult to escape from the dust storage cavity 333, and thus secondary pollution of dust can be effectively avoided.

Preferably, the opening 3330 of the dust storage chamber 333 is located adjacent to the outer circumferential surface 323 of the lens barrel body 32 such that the opening 3330 of the dust storage chamber 333 is aligned with the external thread 320 of the lens barrel body 32. Thus, dust falling from the threaded connection 200 is directly stored by entering the dust storage chamber 333 through the opening 3330 on the bottom surface of the dust protection groove 330. When the lens module 1 is placed in a tilted manner, the dust stored in the dust storage cavity 333 will be collected at a side of the dust storage cavity 333 away from the lens barrel body 32 under the action of gravity, that is, the dust stored in the dust storage cavity 333 will be collected at a position away from the opening 3330 of the dust storage cavity 333, so that the dust in the dust storage cavity 333 is difficult to access the opening 3330 of the dust storage cavity 333 and escape from the dust storage cavity 333, thereby preventing the collected dust from escaping to cause secondary pollution.

More preferably, as shown in fig. 5, the dust-proof member 33 may further be provided with a trench-back cavity 334 having a downward opening, wherein the trench-back cavity 334 is located at the top of the dust storage cavity 333 and is located away from the outer circumferential surface 323 of the lens barrel body 32, so that the trench-back cavity 334 is located around the opening 3330 of the dust storage cavity 333, so that dust stored in the dust storage cavity 333 will be collected in the trench-back cavity 334 and will not escape from the dust storage cavity 333 through the opening 3330 of the dust storage cavity 333 even if the lens module 1 is placed upside down, so as to prevent the dust stored in the dust storage cavity 333 from escaping from the dust storage cavity 333 to cause secondary pollution to the maximum extent. In other words, a blocking piece 335 is disposed outside the opening 3330 of the dust storage cavity 333 to form the dust storage cavity 334 at the top of the dust storage cavity 333 through the blocking piece 335, so that when the lens module 1 is placed upside down, the blocking piece 335 blocks dust from escaping from the opening 3330 of the dust storage cavity 333 and focuses the dust in the dust storage cavity 334, thereby further improving the dust storage effect of the dust storage cavity 333.

According to another aspect of the present invention, the above-described first embodiment of the present invention further provides a lens holder assembly assembling method. Specifically, as shown in fig. 6, the assembling method of the lens holder assembly 2 includes the steps of:

s510: providing a lens barrel 30, wherein the lens barrel 30 includes a barrel body 32, at least one lens 31, and a dust-proof member 33, wherein the barrel body 32 is provided with an external thread 320, wherein the at least one lens 31 is assembled to the barrel body 32, and wherein the dust-proof member 33 extends outward from the barrel body 32; and

s520: the flip lens 30 is screwed into the bottom end 22 of the lens holder 20 to be screwed with the lens barrel body 32, wherein the dust-proof member 33 is located below the screw joint 200 between the lens holder 20 and the lens barrel body 32, and is used for collecting dust falling from the screw joint 200.

In an example of the present invention, the method for assembling the lens holder assembly 2 further includes the steps of:

s530: a square filter 41 is disposed on the dust-proof member 33 of the flip lens 30.

In addition, after the lens module 2 is assembled, the lens module 1 can be assembled by simply mounting the lens holder 20 of the lens holder assembly 2 to the circuit board 11 of the photosensitive assembly 10.

Referring to fig. 7 and 8, a lens module 1A according to a second embodiment of the present invention is illustrated. The lens module 1A according to the second embodiment of the present invention is different from the above-described first embodiment of the present invention in that: the dust-proof member 33A of the flip lens 30A of the lens module 1A may be coupled with a bottom 322 of the barrel body 32 to form a separable annular boss 331A at an outer circumferential surface 323 of the barrel body 32, instead of the annular boss 331 integrally connected with the bottom of the barrel body 32. In this way, when the lens barrel body 32 and the dust-proof member 33A are manufactured, the lens barrel body 32 and the dust-proof member 33A can be manufactured independently, so that the lens barrel body 32 can be manufactured according to a method for manufacturing a lens barrel of a through-type lens, and the difficulty of manufacturing the dust-proof groove 330A in the dust-proof member 33A is greatly reduced, so that the difficulty of manufacturing the lens barrel body 30A can be greatly simplified, and the manufacturing cost of the lens barrel body 30A can be reduced.

Illustratively, as shown in fig. 7, the annular boss 331A may be fixed to the bottom 322 of the barrel body 32 by dispensing, wherein an upper end surface 3311A of the annular boss 331A is combined with the outer circumferential surface 323 of the barrel body 32 to form the dust-proof groove 330A for collecting dust falling from the threaded connection 200. Of course, in other examples of the present invention, the annular boss 331A may also be coupled to the bottom 322 of the lens barrel body 32 by a connection manner, such as interference fit, snap-fit, screwing, sleeving, and the like, which is not further limited by the present invention.

Specifically, as shown in fig. 8, while the annular boss 331A is fixed to the bottom 322 of the lens barrel main body 32 by dispensing, the adsorption layer 34 may be formed by dispensing in the dust-proof groove 330A to adsorb dust falling into the dust-proof groove 330A.

Fig. 9 shows a first variant of the lens module 1A according to the second embodiment of the present invention, wherein the dust-proof member 33A of the flip-chip lens 30A can be implemented as a pressing ring 331A having a peripheral groove 3310A, wherein the pressing ring 331A can be coupled to the bottom 322 of the barrel body 32 by means of a screw connection. In this way, when the pressing ring 331A is screwed with the lens barrel body 32, not only can the pressing ring 331A fix the lens 31 within the lens barrel body 32, but also the peripheral groove 3310A of the pressing ring 331A can cooperate with the outer peripheral surface 323 of the lens barrel body 32 to form a dust-proof groove 330A having a U-shaped cross section for collecting dust falling from the threaded connection 200 between the lens barrel body 32 and the lens holder 20.

It is to be noted that the pressing ring 331A is a common member for fixing a lens, and has been widely used for fixing a lens when assembling a lens. In the present invention, the circumferential groove 3310A is only required to be provided on the upper end surface of the pressing ring 331A without changing the basic structure of the pressing ring, so that the lens 31 can be fixed and the dustproof effect can be achieved.

Illustratively, as shown in fig. 9, the external thread 320 of the lens barrel body 32 may extend to a bottom 322 of the lens barrel body 32, wherein an internal thread 3313A of the pressing ring 331A is threadedly coupled to a lower portion of the external thread 320 of the lens barrel body 32 to fix the lens 31 within the lens barrel body 32, and the peripheral groove 3310A of the pressing ring 331A is threadedly coupled to the outer peripheral surface 323 of the lens barrel body 32 to form the dust-proof groove 330A, wherein the internal thread 210 of the lens holder 20 is threadedly coupled to an upper portion of the external thread 320 of the lens barrel body 32, so that the dust-proof groove 330A can correspond to the threaded connection 200 between the lens holder 20 and the lens barrel body 32, facilitating collection of dust falling from the threaded connection 200 through the dust-proof groove 330A, thereby assembling a lens holder assembly 2A having a dust-proof effect. It is understood that when the pressing ring 331A is screwed with the lens barrel body 32, the starting position of the internal thread 3313A of the pressing ring 331A naturally forms a U-shaped groove as the dust-proof groove 330A, so that the dust-proof groove 330A is located just below the screwed connection 200 between the lens barrel body 32 and the lens base 20. In this way, the dust-proof groove 330A can be formed only by combining the pressing ring 331A with the barrel body 32 without changing the original structure and manufacturing process of the barrel body 32, which greatly reduces the manufacturing process and manufacturing cost of the flip lens 30A, thereby contributing to reduction of the manufacturing cost of the lens holder assembly 2A and the lens module 1A.

It should be noted that, when the pressing ring 331A is screwed with the lens barrel body 32, glue is further dispensed at the screwed position of the pressing ring 331A and the lens barrel body 32 to further strengthen the stability of the connection between the pressing ring 331A and the lens barrel body 32. A sticky adhesive layer is formed on the bottom surface of the dust-proof slot 330A by dispensing, so that the adhesive layer can be implemented as the adsorption layer 34A for adsorbing the dust falling into the dust-proof slot 330A by using the stickiness of the adhesive layer, so as to prevent the dust from escaping from the dust-proof slot 330A to cause secondary pollution.

Preferably, as shown in fig. 9, the filter element 40 of the lens module 1A is attached to the lower end surface 3312A of the pressing ring 331A, and the lens 31 and the filter element 40 can be separated by the pressing ring 331A while the attachment area provided by the lower end surface 3312A of the pressing ring 331A is fully utilized, so as to ensure that the optical system of the flip lens 30A is relatively complete, thereby ensuring that the lens module 1A has high imaging quality. In this way, the filter element 40 can also be implemented as a square filter 41, and can be directly attached to the bottom of the flip-chip lens 30A without polishing, which contributes to greatly reducing the manufacturing cost of the filter element 40, and further reducing the product cost of the lens module 1A.

According to another aspect of the present invention, the above second embodiment of the present invention further provides a method for assembling a flip-chip lens 30A. Specifically, as shown in fig. 10, the method for assembling the flip-chip lens 30A includes the steps of:

s610: assembling at least one lens 31 on the barrel body 32; and

s620: the dust-proof member 33A is coupled to the bottom 322 of the lens barrel body 32 to form an annular boss 331A below the external thread 320 of the lens barrel body 32 for collecting dust.

It is noted that, in an example of the present invention, as shown in fig. 10, the step S620 of the assembling method of the flip-chip lens 30A includes the steps of:

s621: a pressing ring 331A provided with a peripheral groove 3310A is screwed to the bottom 322 of the barrel body 32 to form a dust-proof groove 330A having a U-shaped structure by the cooperation of the peripheral groove 3310A of the pressing ring 331A and the barrel body 32; and

s622: dispensing glue on the joint between the pressing ring 331A and the lens barrel main body 32, and forming an adsorption layer 34A on the bottom surface of the dust-proof groove 330A for adsorbing dust.

Further, in an example of the present invention, as shown in fig. 10, the step S620 further includes the steps of:

s623: a filter element 40 is attached to the lower end surface 3312A of the pressing ring 331A, wherein the filter element 40 is a square filter 41.

According to the above-described second embodiment of the present invention, after the assembly of the flip lens 30A is completed, the flip lens 30A is screwed in from the bottom end 22 of the mirror base 20, so that the flip lens 30A is screwed with the mirror base 20 in a flip manner, and the dust-proof groove 330A is located below the screw joint 200 between the flip lens 30A and the mirror base 20 to assemble the lens-base assembly 2A. Then, the lens holder 20 of the lens holder assembly 2A is mounted to the photosensitive assembly 10, so that the photosensitive chip 12 of the photosensitive assembly 10 corresponds to the lens 31 of the flip-chip lens 30A to assemble the lens module 1A.

Exemplarily, as shown in fig. 11, the assembling method of the lens module 1A includes the steps of:

s710: providing a lens barrel 30A, wherein the lens barrel 30A includes a barrel body 32, at least one lens 31 and a dust-proof member 33A, wherein the barrel body 32 has an external thread 320, wherein the at least one lens 31 is assembled to the barrel body 32, and wherein the dust-proof member 33A is coupled to a bottom 322 of the barrel body 32 and extends outward from the barrel body 32;

s720: screwing the reverse mount lens 30A from the bottom end 22 of the lens holder 20 so that the dust-proof member 33A is positioned below the threaded connection 200 between the reverse mount lens 30A and the lens holder 20 to assemble a lens holder assembly 2A; and

s730: the lens mount 20 of the lens mount assembly is mounted to the photosensitive assembly 10, wherein the photosensitive chip 12 of the photosensitive assembly 10 corresponds to the lens group 31 of the flip-chip lens 30A to assemble the lens module 1A.

In an example of the present invention, before the step S720, the method for assembling the lens module 1A further includes the steps of:

a filter element 40 is attached to the dust-proof part 33A of the inverse lens 30A, wherein the filter element 40 is a square filter 41.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A lens mount assembly, comprising:

the lens base is provided with internal threads; and

the lens barrel comprises a lens barrel body, a lens base and a lens holder, wherein the lens barrel body is provided with an external thread, and the external thread of the lens barrel body can be in threaded connection with the internal thread of the lens base;

the dustproof piece extends outwards from the lens cone main body, is positioned below a threaded connection part between the lens cone main body and the lens base and is used for collecting dust falling from the threaded connection part;

the dustproof piece comprises a dustproof groove corresponding to the threaded connection part and a dust storage cavity communicated with the dustproof groove; the dust storage cavity is positioned at the bottom of the dust-proof groove, and the dust-proof groove and the dust storage cavity are communicated with each other through an opening of the dust storage cavity, so that dust falling into the dust-proof groove can enter the dust storage cavity through the opening;

the size of the opening of the dust storage cavity is smaller than the size of the cavity of the dust storage cavity, so that the dust storage cavity has a structure with a small opening and a large cavity.

2. A lens barrel assembly according to claim 1, wherein said dust-proof member is integrally connected to a bottom portion of said lens barrel body to form an annular projection on an outer peripheral surface of said lens barrel body.

3. The lens holder assembly of claim 1, wherein the dust prevention member is coupled to a bottom of the barrel body to form an annular boss at an outer circumferential surface of the barrel body.

4. A lens holder assembly according to claim 2 or 3, wherein the dust-proof member is provided with a dust-proof groove recessed downward from an upper end surface of the annular projection to correspond to the screw-threaded connection.

5. The lens holder assembly of claim 1, wherein the dust shield further comprises a trench-back cavity opening downward, the trench-back cavity being formed at a top of the dust storage cavity.

6. The lens barrel assembly according to claim 5, wherein the cavity is located away from an outer circumferential surface of the barrel body to prevent dust from escaping from the dust storage cavity.

7. The lens holder assembly of claim 6, wherein the dust prevention member further comprises a barrier sheet disposed outside the opening of the dust storage chamber to form the return channel chamber at the top of the dust storage chamber through the barrier sheet.

8. The lens holder assembly of any one of claims 1 to 3, wherein the flip lens further comprises an adsorption layer, wherein the adsorption layer is provided to the dust-proof member for adsorbing dust falling to the dust-proof member.

9. The lens holder assembly of claim 4, wherein the flip lens further comprises an adsorption layer, wherein the adsorption layer is disposed in the dust-proof groove of the dust-proof member for adsorbing dust falling into the dust-proof groove.

10. A lens mount assembly as recited in claim 9, wherein the absorption layer is a glue layer having a tackiness.

11. The lens holder assembly of claim 1, wherein the dust-proof member is a pressing ring, wherein the pressing ring is screw-coupled to a bottom of the barrel body such that an upper end surface of the pressing ring corresponds to the screw-coupling.

12. The lens barrel assembly as claimed in claim 11, wherein the pressing ring is provided with a peripheral groove, wherein the peripheral groove is located at a screw-thread start position of an upper end surface of the pressing ring to form the dust-proof groove by the peripheral groove of the pressing ring being combined with an outer circumferential surface of the barrel body.

13. The lens holder assembly of claim 12, wherein the external thread of the barrel body extends to a bottom of the barrel body, wherein the pressing ring is threadedly coupled with a lower portion of the external thread of the barrel body, and wherein the holder is threadedly coupled with an upper portion of the external thread of the barrel body.

14. The lens holder assembly of claim 13, wherein the flip lens further comprises a glue layer having an adhesive property, wherein the glue layer is located at a junction between the pressing ring and the barrel body and in the peripheral groove of the pressing ring.

15. The lens mount assembly of any of claims 1-3 and 11-14, further comprising a filter element, wherein the filter element is disposed on the flip-chip lens.

16. The lens holder assembly of claim 15, wherein the filter element is a square filter assembled to the dust prevention member of the flip lens.

17. A reverse-mounted lens, which is used to be assembled on a lens holder in a reverse-mounted manner, is characterized by comprising:

the dustproof piece extends outwards from the lens cone main body, and is positioned below the threaded connection part when the lens cone main body is in threaded connection with the lens base, so as to collect dust falling from the threaded connection part;

18. A lens module, comprising:

a lens holder assembly according to any one of claims 1 to 16, wherein the holder of the lens holder assembly is assembled to the wiring board of the photosensitive assembly, and the photosensitive chip of the photosensitive assembly is made to correspond to the flip lens of the lens holder assembly.

19. A method of assembling a lens holder assembly, comprising the steps of:

the reverse-mounted lens is screwed in from the bottom end of the lens base to be in threaded connection with the external thread of the lens cone main body, wherein the dustproof piece is positioned below the threaded connection part between the lens base and the lens cone main body and is used for collecting dust falling from the threaded connection part;

20. The method of assembling a lens holder assembly of claim 19, further comprising the steps of: