TW202212954A - lens module - Google Patents

Abstract

The invention provides a lens module. A lens seat is provided with a bearing plate and a boss arranged on the bearing plate, the boss is provided with a plurality of exhaust grooves, a lens cone covers the bearing plate and covers the boss, a gap is formed between the bottom surface of the lens cone and the top surface of the bearing plate, and the gap is communicated with the exhaust grooves to enable an inner cavity of the lens cone to be communicated with an external space. According to the lens module, the gas packaged in the lens cone can be exhausted out of the lens cone in time throughthe gap and the exhaust grooves, so that the flatness among electronic components of the lens module is prevented from being influenced, the imaging quality is ensured, and the serious burst problem or layering problem of the lens module during heating can be prevented. Due to the fact that the inner cavity of the lens cone is communicated with the external space, a waterproof breathable film is arranged on the bearing plate and surrounds the boss, at least part of the gap is filled with the waterproof breathable film, impurities such as water vapor and dust in the external space can be prevented from entering the lens module, and the gap and the exhaust grooves do not have adverse effects on the imaging quality of the lens module.

Description

lens module

The present invention relates to the technical field of lenses, in particular to a lens module.

Electronic products such as mobile devices, computers, and electronic watches usually have a lens module. The lens module usually includes a lens barrel and a lens holder, and the lens holder seals the lens group in the lens barrel. When the traditional steps are assembled, some gas will be sealed in the lens barrel, resulting in an air interlayer between the lens group and the inner wall of the lens barrel; It needs to be cured by heating. When heated, the adhesive is easy to generate gas, and the gas in the air interlayer will expand when it is heated. The traditional steps rely on the thread gap between the lens barrel and the lens holder to discharge the above-mentioned gas, but in fact, it is difficult to discharge the gas out of the lens barrel in time, resulting in an unbalanced air pressure inside and outside the lens barrel, which can easily affect the electronic components in the lens module. This will affect the image quality of the camera module, and even lead to serious pop-cornissue or delamination problems in the lens module.

The purpose of the present invention is to provide a lens module, which can keep the air pressure inside and outside the lens barrel balanced, and prevent the lens module from serious bursting or delamination.

In order to achieve the above purpose, the present invention provides a lens module, comprising:

The mirror base has a bearing plate and a boss arranged on the bearing plate, and a plurality of exhaust grooves are arranged on the boss;

The lens barrel is covered on the bearing plate and covers the boss, a gap is formed between the bottom surface of the lens barrel and the top surface of the bearing plate, and the gap is communicated with the exhaust groove so that the The inner cavity of the lens barrel is communicated with the outer space;

A waterproof and breathable membrane is arranged on the bearing plate and surrounds the boss, and the waterproof and breathable membrane fills at least part of the gap.

Optionally, the material of the waterproof and breathable membrane is one or more of nanomaterials, polytetrafluoroethylene, polyethylene or polyurethane.

Optionally, the thickness of the waterproof and breathable membrane is less than or equal to the height of the gap.

Optionally, the exhaust groove is formed by cutting off a part of the edge of the boss.

Optionally, the boss is rectangular, and at least one top corner of the boss is chamfered to form the exhaust groove.

Optionally, the exhaust groove is recessed from the top of the boss to the interior of the boss.

Optionally, the exhaust grooves are symmetrically distributed with respect to the central axis of the boss.

Optionally, the lens barrel is fixed on the bearing plate by adhesive, and the thickness of the adhesive is the height of the gap.

Optionally, the boss is provided with a first through hole, the carrier plate is provided with a second through hole, and the first through hole and the second through hole communicate with each other.

Optionally, a plurality of lens groups are axially arranged in the inner cavity of the lens barrel, a filter is fixed in the first through hole, and a photosensitive wafer is fixed in the second through hole.

The lens module provided by the present invention includes a lens holder, a lens barrel and a waterproof and breathable membrane. The lens holder has a bearing plate and a boss arranged on the bearing plate, and a plurality of exhaust grooves are arranged on the boss. , the lens barrel is covered on the bearing plate and covers the boss, there is a gap between the bottom surface of the lens barrel and the top surface of the bearing plate, and the gap is communicated with the exhaust groove to make the The inner cavity of the lens barrel communicates with the outer space. In the present invention, the gas encapsulated in the lens barrel can be discharged out of the lens barrel in time through the gap and the exhaust groove, so as to avoid affecting the flatness between the electronic components of the lens module, so as to ensure the imaging quality , and can prevent serious popping problems or delamination problems of the lens module when heated. Since the inner cavity of the lens barrel is communicated with the external space, the present invention arranges the waterproof and breathable film on the bearing plate and surrounds the boss. Impurities such as water vapor and dust in the external space can be prevented from entering the lens module, and the setting of the gap and the exhaust groove will not adversely affect the imaging quality of the lens module.

The specific embodiments of the present invention will be described in more detail below with reference to the schematic diagrams. The advantages and features of the present invention will become more apparent from the following description. It should be noted that, the accompanying drawings are all in a very simplified form and in inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention.

Example 1

FIG. 1 a is a schematic structural diagram of a lens module provided in this embodiment, and FIG. 1 b is a structural schematic diagram of a lens holder 200 of the lens module provided in this embodiment. Referring to FIGS. 1 a and 1 b , the lens module includes a lens holder 200 , a lens barrel 100 and a waterproof and breathable membrane 700 .

Specifically, the lens barrel 100 has an inner cavity, and the inner cavity penetrates the lens barrel 100 so that the lens barrel 100 has a hollow cylindrical structure. Several lens groups 500 are installed in the inner cavity, and the lens groups 500 are completely accommodated in the inner cavity. Due to installation errors and other reasons, there is usually an air interlayer G between the outer edge of the lens group 500 and the cavity wall of the inner cavity.

Further, the top opening of the inner cavity is sealed by a cover sheet 600 to prevent dust or moisture from entering the inner cavity through the top opening of the inner cavity and contaminating the lens set 500 . Optionally, the cover sheet 600 may be a flat glass sheet that can transmit light, or the cover sheet 600 may also be a lens with a certain diopter, which is not limited in the present invention.

The lens barrel 100 is covered on the lens seat 200 , and the lens seat 200 is used to seal the bottom opening of the inner cavity and provide support for the lens barrel 100 . Specifically, the lens holder 200 has a bearing plate 201 and a boss 202 disposed on the bearing plate 201 . The lens barrel 100 is covered on the bearing plate 201 and covers the boss 202 . The boss 202 is completely accommodated in the inner cavity.

In this embodiment, the carrier plate 201 and the boss 202 are integrally formed, thereby simplifying the manufacturing process of the mirror holder 200 .

Further, a first through hole is formed in the boss 202 , a second through hole is formed in the bearing plate 201 , and the first through hole and the second through hole communicate with each other. The first through hole and the second through hole make the boss 202 and the carrier plate 201 both ring-shaped. In this embodiment, the carrier plate 201 and the boss 202 are both rectangular rings , Correspondingly, the first through hole and the second through hole are also rectangular, and the central axes of the first through hole and the second through hole coincide, so that the first through hole and The second through holes are concentric holes, but not limited thereto.

Further, the central axes of the first through hole and the second through hole also coincide with the central axis of the inner cavity.

The filter 300 is fixedly arranged in the first through hole, the photosensitive wafer 400 is fixedly arranged in the second through hole, and the light enters the lens barrel 100 through the cover sheet 600 and passes through the lens barrel The lens group 500 in 100 then enters the filter 300, and is filtered by the filter 300 to form a single wavelength of light that is incident on the photosensitive wafer 400, and the photosensitive wafer 400 converts the light signal into electrical signals. signal to achieve imaging. Since the central axes of the first through hole, the second through hole and the inner cavity are all coincident, the lens group 500 , the filter 300 and the photosensitive wafer 400 can be disposed opposite to each other, and the optical axes are coincident , which improves the imaging accuracy.

In this embodiment, specifically, the filter 300 may be an infrared cut filter 300 or blue glass.

Optionally, the optical filter 300 is fixed in the first through hole by adhesive, and the photosensitive chip 400 is fixed in the second through hole by adhesive. In order to prevent light leakage, the first through hole and the second through hole can be separated by an annular partition plate 204, and the filter 300 and the photosensitive chip 400 can be bonded to the partition plate 204 on. The partition plate 204 is an opaque plate-like structure, so as to prevent the gap between the filter 300 and the hole wall of the first through hole and the photosensitive wafer 400 and the second through hole The gap between the hole walls leaks light, which improves the imaging quality.

It can be understood that, the separating plate 204 can also be integrally formed with the supporting plate 201 and the boss 202, but should not be limited thereto.

Further, the lens barrel 100 is fixed on the carrier plate 201 by adhesive. That is to say, when the lens barrel 100 is installed on the lens holder 200 , glue is applied to the bottom surface of the lens barrel 100 first, and then the lens barrel 100 is bonded on the carrier plate 201 . In this way, the process of screwing the lens barrel 100 and the lens holder 200 is omitted, the focus adjustment step of the machine is omitted, and the influence of the debris generated during the screwing on the image quality is eliminated. It should be understood that the adhesive between the bottom surface of the lens barrel 100 and the top surface of the carrier board 201 has a certain thickness, so that there is a gap between the bottom surface of the lens barrel 100 and the top surface of the carrier board 201 Q, the thickness of the glue is the height of the gap Q.

In this embodiment, the gap Q is not filled with glue, so that a part of the gap Q is reserved. Specifically, when the bottom surface of the lens barrel 100 is glued, several places of glue are placed on the bottom surface of the lens barrel 100 by dispensing glue, and then the bottom surface of the lens barrel 100 is attached to the bearing When the top surface of the board 201 is bonded, the gap Q is filled at the position where the glue is applied, and the gap Q is reserved at the position where the glue is not applied. Or it can also be understood in this way, the gap Q between the bottom surface of the lens barrel 100 and the top surface of the carrier plate 201 is annular, and the annular gap Q is divided into several sections by several glues.

Further, a plurality of exhaust grooves 203 are provided on the boss 202 , and the gap Q can be communicated with the exhaust grooves 203 to communicate the inner cavity of the lens barrel 100 with the external space. When adhering the bottom surface of the lens barrel 100 to the top surface of the carrier plate 201 , or adhering the optical filter 300 and the photosensitive chip 400 to the separating plate 204 , the adhesive needs to be heated. At this time, after a large amount of gas generated by the curing of the adhesive or the air in the air interlayer G is heated and expanded, it can be discharged to the outside space through the exhaust groove 203 and the gap Q to prevent the lens barrel 100 from being inside and outside. The air pressure is greatly unbalanced and affects the flatness of the electronic components of the lens module, thereby avoiding the air pressure affecting the image quality, and preventing the lens module from causing serious bursting or delamination problems during heating.

In this embodiment, the exhaust groove 203 is formed by cutting off a top corner of the boss 202 . Since the air interlayer G is located near the cavity wall of the inner cavity, after cutting a top corner of the boss 202, the gas in the air interlayer G can easily enter the air interlayer G through the exhaust groove 203 gap Q, and discharge the lumen.

Of course, the boss 202 is not limited to cutting one top corner to form one vent groove 203, but also can cut two top corners to form two vent grooves 203, three top corners to form three vent grooves 203, or four top corners to form three vent grooves 203. Four exhaust grooves 203 are formed on each of the top corners to improve the exhaust effect; and the boss 202 is not limited to forming the exhaust groove 203 by cutting off the top corners, and the boss 202 can also be cut off. Any part of the edge of the boss 202, or directly chamfering at least one top corner of the boss 202 to form the exhaust groove 203, which will not be described one by one here.

Further, the waterproof and breathable membrane 700 is laid on the top surface of the carrier board 201 and disposed around the boss 202 , and the waterproof and breathable membrane 700 fills at least part of the gap Q. In this embodiment, the thickness of the waterproof and breathable membrane 700 is equal to the height of the gap Q, so that the waterproof and breathable membrane 700 completely fills the gap Q. In this way, while ensuring ventilation, it can also prevent impurities such as water vapor and dust in the external space from entering the lens module, and the setting of the gap Q and the exhaust groove 203 will not affect the lens module. Imaging quality is adversely affected.

As an optional embodiment, the thickness of the waterproof and breathable membrane 700 may also be smaller than the height of the gap Q, and the waterproof and breathable membrane 700 may only fill part of the gap Q, so as to avoid adverse effects on exhaust gas.

Optionally, the material of the waterproof and breathable membrane 700 may be one or more of nanomaterials, polytetrafluoroethylene, polyethylene or polyurethane, as long as the functions of breathability, waterproofness and dustproof can be achieved. In this embodiment, the waterproof and breathable film 700 is a conforming structure film composed of non-woven fabric and a polymer breathable film. In other embodiments, the waterproof and breathable film 700 may also be a single-layer film.

Embodiment 2

FIG. 2a is a schematic structural diagram of a lens module provided in this embodiment, and FIG. 2b is a schematic structural diagram of a lens holder 200 of the lens module provided in this embodiment. Referring to FIGS. 2 a and 2 b , the difference from the first embodiment is that in this embodiment, the exhaust groove 203 is recessed from the top of the boss 202 to the interior of the boss 202 .

Further, the exhaust slot 203 completely penetrates the boss 202 and exposes the surface of the carrier board 201 , and the exhaust slot 203 completely divides the boss 202 into several sections, so as to ensure that the row The air groove 203 can communicate with the gap Q, thereby improving the exhaust effect.

In this embodiment, there are four exhaust slots 203 , and the four exhaust slots 203 are respectively located at four corners of the boss 202 , and the connecting lines between the centers of the two opposite exhaust slots 203 pass through Through the center of the boss 202, the two opposite exhaust grooves 203 are symmetrically arranged, but this should not be limited.

It should be understood that the number of the exhaust grooves 203 is not limited to four, but can also be one, two, three or five, etc., which is not limited in the present invention; the exhaust grooves 203 may be related to the bosses 202 The central axis of the grooves 203 is symmetrically distributed, so as to improve the uniformity of exhaust gas. Of course, the exhaust grooves 203 may not be symmetrically distributed along the center of the boss 202, but distributed disorderly, which will not be illustrated here. .

To sum up, the lens module provided by the present invention includes a lens seat, a lens barrel and a waterproof and breathable membrane. The lens seat has a bearing plate and a boss arranged on the bearing plate. The boss is provided with a plurality of an exhaust slot, the lens barrel is covered on the bearing plate and covers the boss, a gap is formed between the bottom surface of the lens barrel and the top surface of the bearing plate, and the gap communicates with the exhaust slot to The inner cavity of the lens barrel is communicated with the outer space. In the present invention, the gas encapsulated in the lens barrel can be discharged out of the lens barrel in time through the gap and the exhaust groove, so as to avoid affecting the flatness between the electronic components of the lens module, so as to ensure the imaging quality , and can prevent serious popping problems or delamination problems of the lens module when heated. Since the inner cavity of the lens barrel is communicated with the external space, the present invention arranges the waterproof and breathable film on the bearing plate and surrounds the boss. Impurities such as water vapor and dust in the external space can be prevented from entering the lens module, and the setting of the gap and the exhaust groove will not adversely affect the imaging quality of the lens module.

The above are only preferred embodiments of the present invention, and do not have any limiting effect on the present invention. Any person skilled in the art, within the scope of not departing from the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, and does not depart from the technical solution of the present invention. content still falls within the protection scope of the present invention.

100: lens barrel 200: mirror base 201: Carrier plate 202: Boss 203: Exhaust slot 204: Divider 300: Filter 400: photosensitive wafer 500: Lens group 600: cover sheet 700: waterproof breathable membrane G: Air interlayer Q: Gap

1a is a schematic structural diagram of a lens module provided in Embodiment 1 of the present invention; 1b is a schematic structural diagram of a lens holder of a lens module according to Embodiment 1 of the present invention; 2a is a schematic structural diagram of a lens module provided in Embodiment 2 of the present invention; FIG. 2b is a schematic structural diagram of a lens holder of a lens module according to Embodiment 2 of the present invention.

100: lens barrel

200: mirror base

203: Exhaust slot

204: Divider

300: Filter

400: photosensitive wafer

500: Lens group

600: cover sheet

700: waterproof breathable membrane

G: Air interlayer

Q: Gap

Claims (10)

A lens module, comprising: The mirror base has a bearing plate and a boss arranged on the bearing plate, and a plurality of exhaust grooves are arranged on the boss; The lens barrel is covered on the bearing plate and covers the boss, a gap is formed between the bottom surface of the lens barrel and the top surface of the bearing plate, and the gap is communicated with the exhaust groove so that the The inner cavity of the lens barrel is communicated with the outer space; A waterproof and breathable membrane is arranged on the bearing plate and surrounds the boss, and the waterproof and breathable membrane fills at least part of the gap. The lens module according to claim 1, wherein the material of the waterproof and breathable membrane is one or more of nanomaterials, polytetrafluoroethylene, polyethylene or polyurethane. The lens module according to claim 1, wherein the thickness of the waterproof and breathable membrane is less than or equal to the height of the gap. The lens module according to claim 1, wherein the exhaust groove is formed by cutting a part of the edge of the boss. The lens module according to claim 1, wherein the boss is rectangular, and at least one top corner of the boss is chamfered to form the exhaust groove. The lens module according to any one of claims 1, 4 or 5, wherein the exhaust groove is recessed from the top surface of the boss to the interior of the boss. The lens module according to claim 6, wherein the exhaust grooves are symmetrically distributed with respect to the central axis of the boss. The lens module according to claim 1, wherein the lens barrel is fixed on the carrier board by adhesive, and the thickness of the adhesive is the height of the gap. The lens module according to claim 1, wherein a first through hole is formed in the boss, a second through hole is formed in the carrier plate, and the first through hole and the second through hole communicate with each other. . The lens module according to claim 9, wherein a plurality of lens groups are arranged in the inner cavity of the lens barrel along the axial direction, a filter is fixed in the first through hole, and a filter is fixed in the second through hole Photosensitive wafer.

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