CN113866932A

CN113866932A - Bracket assembly, camera module, assembling method of camera module and electronic equipment

Info

Publication number: CN113866932A
Application number: CN202111121618.XA
Authority: CN
Inventors: 李巍; 吴军; 周楠
Original assignee: Jiangxi Jinghao Optical Co Ltd
Current assignee: Jiangxi Jinghao Optical Co Ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2021-12-31

Abstract

The invention relates to the technical field of lenses and discloses a support assembly, a camera module, an assembling method of the camera module and electronic equipment. By adopting the bracket assembly of the embodiment, the electric connection circuit of the adjustable lens of the camera module is simpler, and the difficulty of the assembly process of the camera module is lower.

Description

Bracket assembly, camera module, assembling method of camera module and electronic equipment

Technical Field

The invention relates to the technical field of lenses, in particular to a bracket assembly, a camera module, an assembling method of the camera module and electronic equipment.

Background

In the related art, in order to improve the focusing capability of the camera module, an adjustable lens (T-lens) is added in the camera module, and the adjustable lens is deformed by powering on, thereby implementing the focusing function.

However, in the camera module of the related art, the electrical connection circuit of the adjustable lens is complicated, and the assembly process of the camera module is difficult.

Disclosure of Invention

The embodiment of the invention discloses a support assembly, a camera module, an assembling method of the camera module and electronic equipment.

In a first aspect, an embodiment of the present invention discloses a bracket assembly, which is applied to a camera module, the camera module includes a substrate, a photosensitive element and an adjustable lens, the photosensitive element is disposed on the substrate, the bracket assembly includes a bracket and an electrical connection component, the bracket is used for disposing the adjustable lens, the electrical connection component includes a first end, a middle section and a second end, which are sequentially connected, at least a part of the middle section is embedded in the bracket, the first end protrudes out of the bracket and is used for electrically connecting to the adjustable lens, and the second end protrudes out of the bracket towards the substrate and is used for electrically connecting to the substrate.

At least part through the interlude that connects the electric piece buries underground in the support to make to connect the electric piece and form an organic whole with the support, connect when electric connection adjustable lens and base plate in the electric piece camera module, connect the arrangement of electric piece and not influenced by the inner structure of camera module, need not to detour or avoid, adjustable lens's electric connection circuit is comparatively simple. In addition, the bracket and the electric connecting piece are formed into a whole, so that the electric connecting piece can be installed in place while the bracket is installed when the camera module is assembled, the electric connecting piece does not need to be installed independently, and the difficulty of the assembling process of the camera module is low.

In a second aspect, an embodiment of the present invention discloses a camera module, which includes a substrate, a photosensitive element, a first lens group, a second lens group, an adjustable lens, and a bracket assembly of the first aspect, wherein the photosensitive element is disposed on the substrate, the first lens group includes a first lens barrel and a first lens group mounted in the first lens barrel, the first lens barrel is disposed on the substrate, an image side of the first lens barrel faces the photosensitive element, the bracket is disposed at an object side of the first lens barrel, the bracket is provided with a first light-passing hole for allowing light to be emitted to the first lens barrel, the second lens group is disposed on a side of the bracket departing from the first lens barrel and is disposed corresponding to the first light-passing hole, the adjustable lens is disposed on the bracket and is disposed corresponding to the first light-passing hole, and the first end is electrically connected to the adjustable lens, the second end is electrically connected to the substrate.

Set up adjustable camera lens through the support, and the support is located between first mirror group and the second mirror group to make adjustable camera lens put in the module of making a video recording, and utilize the interlude of connecting the electric piece at least part to bury underground in the support, make the support and connect the electric piece and form an organic whole, connect the internal structure influence that the arranging of electric piece in the module of making a video recording does not receive the module of making a video recording, need not to detour or avoid, adjustable camera lens's electric connection circuit is comparatively simple. In addition, the bracket and the electric connecting piece are formed into a whole, so that the electric connecting piece can be installed in place while the bracket is installed when the camera module is assembled, the electric connecting piece does not need to be installed independently, and the difficulty of the assembling process of the camera module is low.

As an optional implementation manner, in an embodiment of the present invention, the bracket includes a main body portion and an extension portion connected to the main body portion, the main body portion is disposed at an object-side end of the first lens barrel, the main body portion is provided with the first light through hole, and the extension portion extends from the main body portion to the base plate and is located on a peripheral side of the first lens barrel;

the second lens group is arranged on one side, away from the first lens barrel, of the main body part, the adjustable lens is arranged on the main body part, at least part of the middle section is embedded in the main body part and the extension part, the first end protrudes out of the main body part, and the second end protrudes out of the surface, facing the substrate, of the extension part.

This embodiment is through the support design for main part and extension, when utilizing main part and extension to bury the interlude underground, first end and second end protrusion in main part and extension respectively, first end and second end are close to adjustable camera lens and base plate respectively, and the first end of being convenient for is connected with adjustable camera lens electricity, and the second end is connected with the base plate electricity, can simplify the electric connection of adjustable camera lens and base plate and walk the line.

As an optional implementation manner, in an embodiment of the present invention, the middle section includes a first section and a second section that are connected to each other, an end of the first section that is far away from the second section is connected to the first end, the first section is embedded in the main body portion, an end of the second section that is far away from the first section is connected to the second end, and the second section is embedded in the extending portion.

In the embodiment, the first section is embedded in the main body part, and the second section is embedded in the extension part, so that other parts of the electric connecting piece except the first end and the second end are embedded in the bracket, the electric connecting piece is protected as far as possible, and the situation that the electric connecting piece is exposed and damaged is avoided.

As an optional implementation manner, in an embodiment of the present invention, at least a part of a surface of the extending portion facing the peripheral side surface of the first barrel is a curved surface, the curved surface matches with a peripheral side surface of the object side end of the first barrel, and the curved surface abuts against the peripheral side surface of the object side end of the first barrel.

The curved surface abuts against the peripheral side surface of the first lens barrel, so that the assembly precision of the support and the first lens barrel can be improved, and the situation that the relative positions of the first lens group, the adjustable lens and the second lens group are changed due to the fact that the support is displaced relative to the first lens barrel, and further the optical performance of the camera module is affected can be avoided.

As an alternative implementation manner, in the embodiment of the present invention, the electric component embeds at least part of the middle section in the bracket by means of in-mold injection molding.

This embodiment adopts the mode of moulding plastics in the mould, will be when forming the support, buries underground in the support with the at least part of this interlude for the support forms integratively with the electrical connection spare, can effectively reduce cost and man-hour, improves production efficiency, and the support is higher with the overall stability who connects the electrical connection spare.

As an optional implementation manner, in an embodiment of the present invention, the adjustable lens is disposed on a first surface of the bracket, where the first surface is a surface of the bracket facing the first lens barrel, or the first surface is a surface of the bracket facing the second lens group.

This embodiment provides and sets up the mode of adjustable lens in the support different positions, can select according to actual conditions, satisfies different user demands.

As an optional implementation manner, in an embodiment of the present invention, the first surface is provided with a first accommodating groove communicated with the first light through hole, and the adjustable lens is disposed in the first accommodating groove and covers the first light through hole.

This embodiment utilizes this first holding tank to set up this adjustable lens through setting up first holding tank at this first surface, and the space that reducible this adjustable lens occupy to reduce this module of making a video recording's overall length, accord with electronic equipment's miniaturized design, especially make this module of making a video recording can be used for electronic equipment's leading camera.

As an optional implementation manner, in an embodiment of the present invention, a peripheral side surface of the tunable lens abuts against a side wall of the first receiving groove.

The embodiment can improve the assembly precision of the adjustable lens and the bracket by abutting the peripheral side surface of the adjustable lens against the side wall of the first accommodating groove, and can avoid the situation that the relative position of the adjustable lens relative to the bracket is changed to cause the change of the relative position of the first lens group, the adjustable lens and the second lens group, and further the influence on the optical performance of the camera module is caused.

As an optional implementation manner, in an embodiment of the present invention, the first surface is further provided with a plurality of dispensing grooves communicated with the first accommodating groove, the dispensing grooves are distributed around a circumference of the first accommodating groove, and each dispensing groove is filled with a viscose medium so as to adhere and fix the adjustable lens to the first accommodating groove.

This embodiment fills bonding medium through some glue grooves so that adjustable lens bonds and is fixed in first holding tank, and a plurality of glue grooves can make adjustable lens and first holding tank have a plurality of bonding positions, and encircle and distribute in a week of adjustable lens, can heighten the reliability that adjustable lens and first holding tank bonded.

As an optional implementation manner, in an embodiment of the present invention, the first surface is further provided with a plurality of glue overflow grooves, each glue overflow groove is disposed corresponding to each glue dispensing groove, each glue overflow groove is communicated with each corresponding glue dispensing groove to form a step groove, and each glue overflow groove is used for accommodating the bonding medium overflowing from each corresponding glue dispensing groove.

This embodiment is through setting up excessive gluey groove, and when the bonding medium in some gluey grooves spilled over, this excessive gluey groove can hold bonding medium to avoid bonding medium to spill over to the first surface of support and influence the condition emergence of the performance of the module of making a video recording.

As an optional implementation manner, in the embodiment of the present invention, the adjustable lens is electrically connected to the first end through a gold wire;

when the first surface is the surface of the bracket facing the first lens barrel, the end face of the object side end of the first lens barrel is provided with a position avoiding groove, and the position avoiding groove is used for avoiding the gold wire;

when the first surface is the surface of the support facing the second mirror group, a position avoiding groove is formed in the surface of the second mirror group facing the support and used for avoiding the gold wire.

The gold thread is avoided through the position avoiding groove, the setting space can be provided for the gold thread, the situation that the gold thread is interfered with the first lens cone or the second lens group to cause damage to the gold thread is avoided, and the adjustable lens is ensured to be electrically connected with the first end.

As an optional implementation manner, in an embodiment of the present invention, a plurality of first positioning portions are disposed at intervals on one side of the bracket facing the first lens barrel, a plurality of second positioning portions are disposed on an end surface of an object-side end of the first lens barrel corresponding to the first positioning portions, and each of the second positioning portions is connected to each of the first positioning portions in a matching manner.

The first positioning portion and the second positioning portion are connected in a matched mode, the assembling precision of the support and the first lens cone can be improved, and the situation that the relative positions of the first lens group, the adjustable lens and the second lens group are changed due to the fact that the support is in relative displacement with respect to the first lens cone, and further the optical performance of the camera module is affected can be avoided.

As an optional implementation manner, in an embodiment of the present invention, one of the first positioning portion and the second positioning portion is a positioning hole, and the other is a positioning column.

This embodiment provides the first location portion and the second location portion of different grade type, can select according to actual conditions, satisfies not user demand that uses.

As an optional implementation manner, in an embodiment of the present invention, a first through groove is disposed on a peripheral side surface of an image-side end of the first barrel, the first through groove penetrates through a surface of the image-side end of the first barrel facing the image side and a surface of the first barrel facing the object side, and the second end is at least partially located in the first through groove.

This embodiment holds at least part of second end through first logical groove, can reduce the space that the second end occupy to reduce this module of making a video recording's whole volume, and can protect the contact.

As an optional implementation manner, in an embodiment of the present invention, the image capturing module further includes a base and an optical filter, the base is disposed on the substrate, the base is provided with a second light through hole, the second light through hole is used for allowing light to irradiate the photosensitive element, the first lens barrel is disposed on a side of the base away from the substrate and is disposed corresponding to the second light through hole, and the optical filter is covered on the second light through hole.

The second light through hole is formed in the base, so that light rays can be emitted to the photosensitive element, stray light can be filtered by the light filter of the second light through hole through the sealing cover, the accuracy of the light rays received by the photosensitive element is improved, and the imaging quality of the camera module is improved.

As an alternative implementation manner, in the embodiment of the present invention, the peripheral side surface of the chassis is provided with a second through groove, the second through groove penetrates through a surface of the chassis facing the image side and a surface of the chassis facing the object side, and the second end is at least partially located in the second through groove.

This embodiment holds at least part of second end through the second logical groove, can reduce the space that the second end occupy to reduce this module of making a video recording's whole volume, and can protect the electric part.

In a third aspect, an embodiment of the present invention discloses an electronic device, which includes a device main body and the camera module of the second aspect, where the camera module is disposed in the device main body. It can be understood that the electronic device of the third aspect has the beneficial effects of the camera module of the second aspect.

In a fourth aspect, an embodiment of the present invention discloses an assembly method of a camera module, which is applied to the camera module in the second aspect, and the assembly method includes:

mounting the photosensitive element on the substrate;

mounting the adjustable lens to the bracket and electrically connecting the adjustable lens and the first end of the electrical connection member;

positioning and assembling the bracket and the first mirror group;

conducting the second end of the electric connection piece and the substrate in alignment equipment, and actively aligning the adjustable lens, the first mirror group, the second mirror group and the photosensitive element;

the bracket, the second mirror group, the first mirror group and the substrate are fixedly bonded;

soldering the second end of the electrical component and the substrate for electrical connection.

By implementing the assembling method, the assembling bracket and the electric connecting piece can be positioned at the same time, and the assembling process difficulty of the camera module is reduced. Moreover, the camera module assembled by the assembly method of the fourth aspect has the beneficial effects of the second aspect.

Compared with the prior art, the embodiment of the invention at least has the following beneficial effects:

the embodiment of the invention provides a support component, a camera module, an assembly method of the camera module and electronic equipment. Meanwhile, the first end and the second end of the electric connecting piece are respectively and electrically connected with the adjustable lens and the substrate, so that the substrate can be electrified to the adjustable lens to deform the adjustable lens, the focal length of the adjustable lens is adjusted, and the focusing of the camera module is realized. And the middle section of the electric connection piece is at least partially embedded in the bracket, and the first end and the second end of the electric connection piece protrude out of the bracket, namely, the bracket and the electric connection piece are integrally formed, the electric connection piece is arranged by utilizing the structure of the bracket, the electric connection circuit of the adjustable lens is simplified, and the electric connection piece can be installed in place while the bracket is installed when the camera module is assembled, the electric connection piece does not need to be installed independently, and the difficulty of the assembling process of the camera module is low.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for a person skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a camera module according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of a camera module according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a bracket and an electric connecting part disclosed by the embodiment of the invention;

fig. 4 is an exploded schematic view of a camera module according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a stent according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an electronic device according to a second embodiment of the present invention;

fig. 7 is a schematic flow chart illustrating an assembling method of a camera module according to a third embodiment of the present invention.

Reference numerals: 10. a substrate; 11. a photosensitive element; 12. a first mirror group; 121. a first barrel; 121a and a position avoiding groove; 121b, a second positioning part; 121c, a first through groove; 122. a first lens group; 13. a support; 13a, a first light through hole; 13b, a first surface; 131. a main body portion; 132. an extension portion; 132a, curved surface; 133. a first accommodating groove; 134. a notch; 135. dispensing a glue groove; 136. a glue overflow groove; 137. a first positioning portion; 14. a second mirror group; 15. an adjustable lens; 16. connecting a power piece; 161. a first end; 162. a middle section; 162a, a first segment; 162b, a second segment; 163. a second end; 17. a base; 17a, a second light through hole; 17b, a second accommodating groove; 17c, a second through groove; 18. an optical filter; 100. a camera module; 20. an apparatus main body; 200. an electronic device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The invention discloses a bracket component, a camera module, an assembling method of the camera module and electronic equipment.

Example one

Referring to fig. 1 to fig. 3 together, a schematic structural diagram of a camera module 100 according to an embodiment of the present invention is shown, in which the camera module 100 includes a substrate 10, a photosensitive element 11, a first lens group 12, a bracket 13, a second lens group 14, an adjustable lens 15 and an electrical connection element 16, the photosensitive element 11 is disposed on the substrate 10, the first lens group 12 includes a first lens barrel 121 and a first lens group 122 mounted in the first lens barrel 121, the first lens barrel 121 is disposed on the substrate 10, an image side end of the first lens barrel 121 faces the photosensitive element 11, the bracket 13 is disposed at an object side end of the first lens barrel 121, the bracket 13 is disposed with a first light through hole 13a, the first light through hole 13a is used for allowing light to irradiate the first lens barrel 121, the second lens group 14 is disposed at a side of the bracket 13 away from the first lens barrel 121 and corresponds to the first light through hole 13a, the adjustable lens 15 is disposed on the bracket 13, and is disposed corresponding to the first light-passing hole 13a, the electrical connection component 16 includes a first end 161, a middle section 162 and a second end 163 sequentially connected, at least a portion of the middle section 162 is embedded in the support 13, the first end 161 protrudes out of the support 13 and is electrically connected to the tunable lens 15, and the second end 163 protrudes out of the support 13 toward the substrate 10 and is electrically connected to the substrate 10.

The image side is a side facing the light receiving element 11, and the object side is a side facing the imaging object of the image capturing module 100.

In this embodiment, the first lens barrel 121 is disposed on the substrate 10, the bracket 13 is disposed at an object side end of the first lens barrel 121, the adjustable lens 15 is disposed on the bracket 13, and the second lens group 14 is disposed at a side of the bracket 13 away from the first lens barrel 121, so that the adjustable lens 15 is located between the first lens group 12 and the second lens group 14, and the adjustable lens 15 is disposed in the middle of the camera module 100. It can be understood that, compared with the related art, the present embodiment has many advantages by using the design with the adjustable lens 15 in the front of the camera module (the adjustable lens is the lens group closest to the object side in the camera module). In one aspect, the lens group closest to the object side in the camera module 100 is the second lens group 14, in this case, the second lens group 14 can adopt a lens with a small head to reduce the overall size of the camera module 100, and in particular, the camera module 100 can be used for a front camera of an electronic device. On the other hand, considering that the surface of the adjustable lens 15 is a thin film, the surface is likely to be damaged, so that the adjustable lens 15 can be protected by the adjustable lens 15 located between the first lens group 12 and the second lens group 14, the adjustable lens 15 is prevented from being damaged or contaminated by foreign objects (dust, sewage, etc.), and a better dustproof effect is achieved. In addition, the adjustable lens 15 adopts a mid-set design, when the camera module 100 is assembled, the adjustable lens 15, the first lens group 12 and the second lens group 14 can be respectively adjusted in position and then fixed, the adjustment processes are not mutually uniform, the assembly tolerance can be reduced, and the assembly precision of the camera module 100 is improved.

Meanwhile, the first end 161 and the second end 163 of the electrical connection component 16 are electrically connected to the adjustable lens 15 and the substrate 10, respectively, so that the substrate 10 can energize the adjustable lens 15 to deform the adjustable lens 15, and adjust the focal length of the adjustable lens 15, thereby realizing the focusing of the camera module 100. In addition, in order to electrically connect the first end 161 and the second end 163 with the tunable lens 15 and the substrate 10, the first end 161 and the second end 163 both protrude out of the holder 13, and the middle section 162 for conducting the first end 161 and the second end 163 is at least partially embedded in the holder 13, so that the holder 13 and the electrical connection member 16 are integrally formed, and the electrical connection member 16 is protected as much as possible. It can be understood that, considering that the internal structure of the camera module 100 is relatively complex, in the related art, when designing the electrical connection traces between the adjustable lens and the substrate, since a certain distance exists between the adjustable lens and the substrate, and the electrical connection traces of the adjustable lens are usually limited by a part of devices or a part of structures in the camera module, the routing needs to be bypassed or avoided, which results in that the electrical connection traces of the adjustable lens in the related art become complex. However, in the present embodiment, while the bracket 13 is used to set the adjustable lens 15, the electrical connection component 16 is set by using the structure of the bracket 13 itself, the arrangement of the electrical connection component 16 in the camera module 100 is not affected by the internal structure of the camera module 100, and the electrical connection line of the adjustable lens 15 is relatively simple without bypassing or avoiding. Moreover, because the bracket 13 and the electric connecting piece 16 are formed into a whole, when the camera module 100 is assembled, the bracket 13 can be installed and the electric connecting piece 16 can be installed in place, the electric connecting piece 16 does not need to be installed separately, and the assembly process difficulty of the camera module 100 is low.

Illustratively, the electrical component 16 is molded by Insert molding (Insert molding) to embed at least a portion of the intermediate section 162 within the cradle 13. It can be understood that, the mode of in-mold injection molding is adopted, and at least part of the middle section 162 is embedded in the bracket 13 while the bracket 13 is formed, so that the bracket 13 and the electric connecting piece 16 are formed into a whole, the cost and the working hours can be effectively reduced, the production efficiency is improved, and the overall stability of the bracket 13 and the electric connecting piece 16 is higher. In some other embodiments, the bracket 13 may form an inner space for accommodating at least a portion of the middle section 162 by a slot, and the electrical component 16 is disposed in the inner space to embed at least a portion of the middle section 162 in the bracket 13, which is not limited in this embodiment.

The electrical connection component 16 may be a Pin (Pin) or a conductive wire, which is not limited in this embodiment.

In this embodiment, as shown in fig. 3 and fig. 4, the bracket 13 includes a main body portion 131 and an extending portion 132 connected to the main body portion 131, the main body portion 131 is disposed at an object side end of the first lens barrel 121, the main body portion 131 is provided with the first light passing hole 13a, the extending portion 132 extends from the main body portion 131 to the substrate 10 and is located at a peripheral side of the first lens barrel 121, the second lens group 14 is disposed at a side of the main body portion 131 away from the first lens barrel 121, the adjustable lens 15 is disposed at the main body portion 131, the middle section 162 is at least partially embedded in the main body portion 131 and the extending portion 132, the first end 161 protrudes from the main body portion 131, and the second end 163 protrudes from a surface of the extending portion 132 facing the substrate 10. It is understood that the bracket 13 is designed as the main body 131 and the extension 132, the middle segment 162 is embedded by the main body 131 and the extension 132, since the tunable lens 15 is disposed on the main body 131, the protrusion of the first end 161 from the main body 131 can shorten the distance between the first end 161 and the tunable lens 15 as much as possible, thereby facilitating the electrical connection between the tunable lens 15 and the first end 161, and the extension 132 extends from the main body 131 to the substrate 10 can extend the middle segment 162 embedded in the bracket 13 from the main body 131 to the extension 132, and protrudes from the extension 132 toward the surface of the substrate 10 to the outside of the bracket 13, shortening the distance between the second end 163 and the substrate 10 as much as possible, thereby facilitating the electrical connection between the substrate 10 and the second end 163. This allows the electrical connection member 16 to be embedded by the structure of the holder 13, and also allows the electrical connection between the adjustable lens 15 and the substrate 10 to be simplified.

For example, as shown in fig. 3, the middle section 162 includes a first section 162a and a second section 162b connected to each other, an end of the first section 162a away from the second section 162b is connected to the first end 161, the first section 162a is embedded in the main body 131, an end of the second section 162b away from the first section 162a is connected to the second end 163, and the second section 162b is embedded in the extending portion 132. It can be understood that in the present embodiment, the first segment 162a is embedded in the main body portion 131, and the second segment 162b is embedded in the extension portion 132, so that the other portions of the electric component 16 except for the first end 161 and the second end 163 are embedded in the bracket 13, and the electric component 16 is protected as much as possible, and the electric component 16 is prevented from being damaged due to exposure.

In the present embodiment, as shown in fig. 4 and fig. 5, at least a portion of the peripheral side surface of the extension portion 132 facing the first barrel 121 is a curved surface 132a, the curved surface 132a matches with the peripheral side surface of the object side end of the first barrel 121, and the curved surface 132a abuts against the peripheral side surface of the object side end of the first barrel 121. It can be understood that, on the one hand, when the bracket 13 is assembled with the first barrel 121, the curved surface 132a can abut against the peripheral side surface of the object-side end of the first barrel 121, so as to position the bracket 13, improve the assembly accuracy, and reduce the difficulty of the assembly process. On the other hand, after the assembly of the holder 13 and the first barrel 121 is completed, the curved surface 132a abuts against the peripheral side surface of the object side end of the first barrel 121, so that the holder 13 can be limited, the connection reliability of the holder 13 and the first barrel 121 after the assembly is improved, and the occurrence of the situation that the relative positions of the first lens group 12, the adjustable lens 15 and the second lens group 14 are changed due to the relative displacement of the holder 13 relative to the first barrel 121, and the optical performance of the camera module 100 is further affected is avoided.

Optionally, the adjustable lens 15 is disposed on a first surface 13b of the bracket 13, where the first surface 13b is a surface of the bracket 13 facing the first barrel 121, or the first surface 13b is a surface of the bracket 13 facing the second lens group 14. It can be understood that the present embodiment provides a manner of disposing the adjustable lens 15 at different positions of the bracket 13, which can be selected according to practical situations, so as to meet different use requirements.

In the following, regarding the further design of the camera module 100, the first surface 13b is taken as the surface of the bracket 13 facing the first barrel 121 in the present embodiment as an example for description. In some other embodiments, if the first surface 13b is designed as a surface of the bracket 13 facing the second lens group 14, the design of the first surface 13b as a surface of the bracket 13 facing the first lens barrel 121 may be referred to for further design of the camera module 100, and this is not particularly limited.

In this embodiment, the first surface 13b is provided with a first receiving groove 133 communicating with the first light-passing hole 13a, and the adjustable lens 15 is disposed in the first receiving groove 133 and covers the first light-passing hole 13 a. It can be understood that, by disposing the first receiving groove 133 on the first surface 13b and disposing the adjustable lens 15 by using the first receiving groove 133, the space occupied by the adjustable lens 15 can be reduced, thereby reducing the overall length of the camera module 100, and conforming to the miniaturized design of the electronic device, in particular, enabling the camera module 100 to be used for a front camera of the electronic device.

Optionally, the first surface 13b is provided with a notch 134 communicating the inside of the bracket 13 and the first receiving groove 133, and the first end 161 protrudes from the notch 134 to the outside of the bracket 13. It can be understood that the first end 161 protrudes out of the bracket 13 through the notch 134, and the first end 161 is disposed near the first receiving groove 133, so as to facilitate the electrical connection between the tunable lens 15 and the first end 161, which is beneficial to simplify the electrical connection routing of the tunable lens 15.

Further, the peripheral side surface of the tunable lens abuts against the sidewall of the first receiving groove 133. It can be understood that, on one hand, when the tunable lens 15 is assembled with the bracket 13, the peripheral side surface of the tunable lens 15 can abut against the sidewall of the first receiving groove 133, so as to position the tunable lens 15, thereby improving the assembly precision and reducing the difficulty of the assembly process. On the other hand, after the adjustable lens 15 and the bracket 13 are assembled, the peripheral side surface of the adjustable lens 15 abuts against the sidewall of the first receiving groove 133, and the sidewall of the first receiving groove 133 can limit the adjustable lens 15, so as to avoid the occurrence of a situation that the relative positions of the first lens group 12, the adjustable lens 15 and the second lens group 14 are changed due to the relative displacement of the adjustable lens 15 with respect to the first receiving groove 133 (i.e., the bracket 13), and further the optical performance of the camera module 100 is affected.

Optionally, the shape and size of the first receiving groove 133 are adapted to the adjustable lens 15. For example, the tunable lens 15 of the present embodiment is square, and the first accommodating groove 133 is a square groove matching with the shape and size of the tunable lens 15. In some other embodiments, the adjustable lens 15 may have a circular shape, and the first receiving groove 133 may match with a circular groove, which is not limited in this embodiment.

In some embodiments, the surface of the tunable lens 15 facing the image side may be adhered to the bottom surface of the first receiving groove 133, so as to fix the tunable lens 15 in the first receiving groove 133.

Optionally, the first surface 13b is further provided with a plurality of dispensing grooves 135 communicated with the first receiving groove 133, the dispensing grooves 135 are circumferentially distributed around the first receiving groove 133, and the dispensing grooves 135 are filled with an adhesive medium to adhere and fix the adjustable lens 15 to the first receiving groove 133. It is understood that, on the one hand, if the tunable lens 15 and the first receiving groove 133 have no other bonding position, the tunable lens 15 can be fixed to the first receiving groove 133 by the bonding medium of the plurality of glue grooves 135 in this embodiment, and if the tunable lens 15 and the first receiving groove 133 have other bonding positions (for example, the surface of the tunable lens facing the object side can be bonded to the bottom surface of the first receiving groove 133), the reliability of fixing the tunable lens 15 to the first receiving groove 133 can be improved by the bonding medium of the plurality of glue grooves 135. On the other hand, the plurality of glue dispensing grooves 135 are circumferentially distributed around the first receiving groove 133, so that the adjustable lens 15 and the first receiving groove 133 have a plurality of bonding positions, and are circumferentially distributed around the adjustable lens 15, which can improve the bonding reliability between the adjustable lens 15 and the first receiving groove 133, and when the bonding medium is varied (expands with heat and contracts with cold), the acting force of the bonding medium of each glue dispensing groove 135 on the adjustable lens 15 can be mutually counteracted, thereby reducing the risk that the optical performance of the camera module 100 is reduced due to the relative position change of the adjustable lens 15 with respect to the first receiving groove 133 caused by the acting force generated when the bonding medium is varied.

Further, the first surface 13b is further provided with a plurality of glue overflow grooves 136, each glue overflow groove 136 is disposed corresponding to each glue groove 135, each glue overflow groove is communicated with the corresponding glue groove 135 to form a step groove, and each glue overflow groove 136 is used for accommodating the bonding medium overflowing from the corresponding glue groove 135. It can be understood that, by providing the glue overflow groove 136, when the bonding medium in the glue dispensing groove 135 overflows, the glue overflow groove 136 can accommodate the bonding medium, thereby preventing the bonding medium from overflowing to the first surface 13b of the bracket 13 and affecting the performance of the camera module 100.

The adjustable lens 15 is electrically connected to the first end 161 by a gold wire (not shown), for example. In some other embodiments, the adjustable lens 15 may also be electrically connected to the first end 161 through a copper wire, solder, or the like, which is not limited in this embodiment.

In the present embodiment, referring to fig. 2 again, the first surface 13b is a surface of the bracket 13 facing the first barrel 121, an end surface of an object-side end of the first barrel 121 is provided with an avoiding groove 121a, and the avoiding groove 121a is used for avoiding the gold wire. It can be understood that, the avoiding groove 121a avoids the gold wire, on one hand, it can provide a setting space for the gold wire, and on the other hand, it can avoid the situation that the gold wire interferes with the first barrel 121 to cause the gold wire to be damaged, and ensure the electrical connection between the adjustable lens 15 and the first end 161. In some other embodiments, when the first surface 13b is a surface of the bracket 13 facing the second mirror group 14, a surface of the second mirror group 14 facing the bracket 13 is provided with an avoiding groove 121a, and the avoiding groove 121a is used for avoiding the gold wire. It can be understood that only the position of the avoiding groove 121a is different, and the beneficial effects thereof can refer to the above description and are not described herein.

In some embodiments, as shown in fig. 4 and fig. 5, a plurality of first positioning portions 137 are disposed at intervals on one side of the bracket 13 facing the first barrel 121, a plurality of second positioning portions 121b are disposed on an end surface of an object-side end of the first barrel 121 corresponding to the first positioning portions 137, and each second positioning portion 121b is connected to each first positioning portion 137 in a matching manner. It can be understood that, on the one hand, when the bracket 13 is assembled with the first barrel 121, the first positioning portion 137 and the second positioning portion 121b are cooperatively connected, so that the bracket 13 can be positioned, and the assembly precision of the bracket 13 and the first barrel 121 can be improved. On the other hand, after the assembly of the bracket 13 and the first barrel 121 is completed, the first positioning portion 137 and the second positioning portion 121b are used for matching connection, so that the bracket 13 can be limited, the connection reliability of the assembled bracket 13 and the first barrel 121 is improved, and the occurrence of a situation that the relative positions of the first lens group 12, the adjustable lens 15 and the second lens group 14 are changed due to the relative displacement of the bracket 13 relative to the first barrel 121, and further the optical performance of the camera module 100 is affected is avoided.

Optionally, one of the first positioning portion 137 and the second positioning portion 121b is a positioning hole, and the other is a positioning post. It can be understood that the present embodiment provides different types of the first positioning portion 137 and the second positioning portion 121b, which can be selected according to actual situations, and meets different use requirements.

In this embodiment, a first through groove 121c is disposed on an outer circumferential surface of the image side end of the first barrel 121, the first through groove 121c penetrates through a surface of the image side end of the first barrel 121 facing the image side and a surface of the first barrel 121 facing the object side, and the second end 163 is at least partially located in the first through groove 121 c. It can be understood that, on the one hand, by accommodating at least part of the second end 163 through the first through slot 121c, the space occupied by the second end 163 can be reduced, thereby reducing the overall volume of the camera module 100. On the other hand, when the camera module 100 is subjected to external impact, the first through groove 121c can reduce the risk of external impact on the first end 161, thereby protecting the electrical components 16.

In some embodiments, referring to fig. 2 again, the image capturing module 100 further includes a base 17 and a filter 18, the base 17 is disposed on the substrate 10, the base 17 is disposed with a second light hole 17a, the second light hole 17a is used for allowing light to irradiate the photosensitive element 11, the first barrel 121 is disposed on a side of the base 17 away from the substrate 10 and disposed corresponding to the second light hole 17a, and the filter 18 covers the second light hole 17 a. It can be understood that the second light through hole 17a is formed in the base 17 for the light to irradiate the photosensitive element 11, and the optical filter 18 covering the second light through hole 17a is used for filtering stray light, so as to improve the accuracy of the light received by the photosensitive element 11, thereby improving the imaging quality of the camera module 100.

Furthermore, a second receiving groove 17b communicating with the second light passing hole 17a is disposed on a side of the base 17 away from the substrate 10, and the filter 18 is disposed in the second receiving groove 17 b. It can be understood that, by disposing the optical filter 18 in the second receiving groove 17b, the space occupied by the optical filter 18 can be reduced, so as to reduce the overall length of the camera module 100, and meet the miniaturization design of the electronic device, in particular, the camera module 100 can be used for a front camera of the electronic device.

Illustratively, the peripheral side surface of the base 17 is provided with a second through groove 17c, the second through groove 17c penetrates through the surface of the base 17 facing the image side and the surface facing the object side, and the second end 163 is at least partially located in the second through groove 17 c. It can be understood that, by receiving at least a portion of the second end 163 through the second through slot 17c, the space occupied by the second end 163 can be reduced, thereby reducing the overall volume of the camera module 100. On the other hand, when the camera module 100 is subjected to external impact, the second through slot 17c can reduce the risk of external impact on the second end 163, thereby protecting the electrical components 16.

Alternatively, the substrate 10 may be any one of a hard circuit board, a rigid-flex board, or a flexible circuit board. It is understood that different types of the substrate 10 can be selected according to actual situations to meet different use requirements, and the embodiment is not particularly limited thereto.

The photosensitive element 11 may be a CCD (Charge-coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) element, for example. Different types of photosensitive elements 11 can be selected according to actual situations to meet different use requirements, which is not specifically limited in this embodiment.

That is, the camera module 100 can be matched with different substrates 10 and photosensitive elements 11 according to actual needs, so as to meet different requirements.

In the camera module 100 according to the first embodiment of the present invention, the photosensitive element 11 is disposed on the substrate 10, the first lens group 12 includes the first lens barrel 121 and the first lens group 122 mounted on the first lens barrel 121, the first lens barrel 121 is disposed on the substrate 10, the bracket 13 is disposed at the object side end of the first lens barrel 121, the second lens group 14 is disposed at a side of the bracket 13 away from the first lens barrel 121, and the adjustable lens 15 is disposed on the bracket 13, that is, the adjustable lens 15 is located between the first lens group 12 and the second lens group 14, so as to realize the center placement of the adjustable lens 15 in the camera module 100. Meanwhile, the first end 161 and the second end 163 of the electrical connection component 16 are electrically connected to the adjustable lens 15 and the substrate 10, respectively, so that the substrate 10 can energize the adjustable lens 15 to deform the adjustable lens 15, and adjust the focal length of the adjustable lens 15, thereby realizing focusing of the camera module 100. Moreover, the middle section 162 of the electric connecting piece 16 is at least partially embedded in the bracket 13, and the first end 161 and the second end 163 of the electric connecting piece 16 protrude out of the bracket 13, that is, the bracket 13 and the electric connecting piece 16 are formed into a whole, the electric connecting piece 16 is arranged by utilizing the structure of the bracket 13, the electric connection circuit of the adjustable lens 15 is simplified, and when the camera module 100 is assembled, the bracket 13 can be installed while the electric connecting piece 16 is installed in place, the electric connecting piece 16 does not need to be installed separately, and the difficulty of the assembling process of the camera module 100 is low.

Example two

Referring to fig. 6, a schematic diagram of a structure of an electronic apparatus 200 according to a second embodiment of the present invention is shown, in which the electronic apparatus 200 includes an apparatus main body 20 and a camera module 100 according to a first embodiment, and the camera module 100 is disposed on the apparatus main body 20.

The electronic device 200 of the present embodiment may be a mobile phone, a tablet computer, a camera, a monitoring probe, or the like. The camera module 100 can be fixed or movably disposed on the device body 20, and when the electronic device 200 is a mobile phone or a tablet, the camera module 100 can be a front camera module or a rear camera module of the mobile phone or the tablet.

The second embodiment of the present invention provides an electronic apparatus 200, in which the electrical connection circuit of the adjustable lens of the camera module 100 is relatively simple, and the assembly process difficulty of the camera module 100 is relatively low.

EXAMPLE III

Please refer to fig. 7, which is a flowchart illustrating an assembly method of a camera module according to a third embodiment of the present invention, where the assembly method is applied to the camera module according to the first embodiment, and the specific structure of the camera module can refer to the first embodiment and is not described again. The assembling method comprises the following steps:

301. the photosensitive element is mounted on the substrate.

It is understood that, by performing step 301, the photosensitive element is fixed on the substrate, and the photosensitive element is electrically connected to the substrate.

302. The adjustable lens is mounted to the bracket and electrically connected to the adjustable lens and the first end of the electrical connection member.

It should be understood that, when the assembling method is applied to the camera module according to the first embodiment, the adjustable lens can be mounted in the first receiving groove of the bracket when the adjustable lens is mounted to the bracket. Moreover, as can be seen from the first embodiment, if the adjustable lens is connected to the first receiving groove in an adhesive manner, the step 302 may specifically be: the surface of the adjustable lens facing the image side can be bonded to the bottom surface of the first accommodating groove, bonding media are added to each glue dispensing groove so as to further bond and fix the adjustable lens to the first accommodating groove, Ultraviolet Curing (UV) is carried out, the adjustable lens is electrically connected with the first end of the electric piece in a gold wire bonding mode, and then baking is carried out.

More specifically, the process of electrically connecting the adjustable lens and the first end of the electrical connection component by means of gold wire bonding may be as follows: the method comprises the steps of setting preset related parameters (such as diameter, arc height and the like) of a gold wire in gold wire bonding equipment (such as a gold wire bonding machine), placing a support on a jig of the equipment, fixing the support (such as vacuum suction and fixation), moving a porcelain nozzle of the equipment to place a gold wire ball at a first end of a power connection piece, moving the porcelain nozzle along a preset path and enabling the porcelain nozzle to move to a power connection position (Pad, welding Pad) on the surface of an adjustable lens facing a first lens barrel, placing the gold wire ball at the power connection position of the adjustable lens by the porcelain nozzle again, and completing the electric connection of the adjustable lens and the first end of the power connection piece.

303. And positioning and assembling the bracket and the first mirror group.

In one embodiment, in step 303, the first positioning portion of the bracket and the second positioning portion of the first lens barrel are connected in a matching manner, and the curved surface of the extending portion of the bracket and the peripheral side surface of the object side end of the first lens barrel are matched, so as to realize positioning between the bracket and the first lens group, and the bracket and the first lens group can be fixed in an adhesive manner.

In addition, when the positioning assembly of the bracket and the first mirror group is completed, the electric connecting piece and the bracket are integrally formed, so that the positioning assembly of the electric connecting piece in the camera module can be completed simultaneously, and the manufacturing difficulty of the camera module is reduced.

304. And conducting the second end of the electric connection piece and the substrate in the alignment equipment, and actively aligning the adjustable lens, the first mirror group, the second mirror group and the photosensitive element.

The second end and the base plate of the electric part are conducted in the alignment equipment through the circuit which is possessed by the alignment equipment, so that the situation that when the second end and the base plate of the electric part are conducted, the relative position of the support and the base plate is fixed to influence the active alignment is avoided, and the focus of the adjustable lens can be controlled through the base plate when the active alignment is conducted subsequently, and the normal active alignment is guaranteed. After the active alignment is completed, the second end of the electrical connection part can be disconnected with the substrate.

305. And the fixed support, the second mirror group, the first mirror group and the substrate are bonded.

It is understood that after the step 305 is performed, the positions of the components of the camera module are fixed and the mechanical assembly of the components can be completed.

When the fixing support and the second mirror group are bonded, the bonding mode can be adopted twice. The end face of the image side end of the second lens group is bonded with the surface of the support facing the object side, a gap for air escape is reserved at the position of the end face, and after curing, glue is further supplemented to seal the gap. It can be understood that, when bonding for the first time, can bond support and second mirror crowd fixed, and the breach that leaves can be used to escape gas when the solidification, and after the solidification, bonding for the second time can seal this breach and prevent that foreign matter (water or dust) from entering into the camera module.

306. And welding the second end of the electric connecting piece and the substrate to be electrically connected.

It is understood that, after step 306 is performed, the substrate and the tunable lens are conducted through the electrical connection component, and at this time, the electrical assembly between the components of the camera module is completed.

The third embodiment of the invention provides an assembly method of a camera module, by implementing the assembly method, an assembly bracket and an electric part can be positioned at the same time, and the assembly process difficulty of the camera module is reduced.

The above detailed descriptions of the bracket assembly, the camera module, the assembling method thereof, and the electronic device disclosed in the embodiments of the present invention are provided, and the principles and embodiments of the present invention are described herein by applying an example, and the description of the above embodiments is only provided to help understanding the bracket assembly, the camera module, the assembling method thereof, the electronic device, and the core ideas thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a bracket component, its characterized in that is applied to the module of making a video recording, the module of making a video recording includes base plate, photosensitive element and adjustable camera lens, photosensitive element locates on the base plate, the bracket component includes:

the bracket is used for arranging the adjustable lens; and

the electric connection part comprises a first end, a middle section and a second end which are sequentially connected, at least part of the middle section is embedded in the support, the first end protrudes out of the support and is used for being electrically connected to the adjustable lens, and the second end protrudes out of the support towards the substrate and is used for being electrically connected to the substrate.

2. A camera module, comprising a substrate, a photosensitive element, a first lens group, a second lens group, an adjustable lens, and the bracket assembly of claim 1, wherein the photosensitive element is disposed on the substrate, the first lens group comprises a first lens barrel and a first lens group mounted in the first lens barrel, the first lens barrel is disposed on the substrate, an image side of the first lens barrel faces the photosensitive element, the bracket is disposed at an object side of the first lens barrel, the bracket is provided with a first light-passing hole for allowing light to irradiate the first lens barrel, the second lens group is disposed on a side of the bracket departing from the first lens barrel and is disposed corresponding to the first light-passing hole, the adjustable lens is disposed on the bracket and is disposed corresponding to the first light-passing hole, and the first end is electrically connected to the adjustable lens, the second end is electrically connected to the substrate.

3. The camera module according to claim 2, wherein the bracket includes a main body portion and an extension portion connected to the main body portion, the main body portion is disposed at an object-side end of the first barrel, the main body portion is provided with the first light passing hole, and the extension portion extends from the main body portion to the base plate and is located on a peripheral side of the first barrel;

4. The camera module of claim 3, wherein the intermediate section comprises a first section and a second section connected to each other, wherein an end of the first section remote from the second section is connected to the first end, the first section is embedded in the main body, an end of the second section remote from the first section is connected to the second end, and the second section is embedded in the extension portion.

5. The camera module according to claim 3, wherein at least a portion of a surface of the extension portion facing the peripheral side surface of the first barrel is a curved surface, the curved surface matches with a peripheral side surface of the object side end of the first barrel, and the curved surface abuts against the peripheral side surface of the object side end of the first barrel.

6. The camera module according to any one of claims 2 to 5, wherein the electrical component is formed by insert molding at least a portion of the middle section in the bracket.

7. The camera module according to any one of claims 2 to 5, wherein the adjustable lens is disposed on a first surface of the holder, and the first surface is a surface of the holder facing the first lens barrel, or the first surface is a surface of the holder facing the second lens group.

8. The camera module of claim 7, wherein the first surface is provided with a first receiving groove communicated with the first light through hole, and the adjustable lens is disposed in the first receiving groove and covers the first light through hole.

9. The camera module of claim 8, wherein a peripheral side surface of the adjustable lens abuts against a side wall of the first receiving groove.

10. The camera module according to claim 8, wherein the first surface further has a plurality of dispensing grooves communicating with the first receiving groove, the dispensing grooves are circumferentially distributed around a circumference of the first receiving groove, and each dispensing groove is filled with an adhesive medium to adhesively fix the adjustable lens to the first receiving groove.

11. The camera module of claim 10, wherein the first surface further comprises a plurality of glue overflow grooves, each glue overflow groove is disposed corresponding to each glue dispensing groove, each glue overflow groove is communicated with each corresponding glue dispensing groove to form a step groove, and each glue overflow groove is used for accommodating the bonding medium overflowing from each corresponding glue dispensing groove.

12. The camera module of claim 7, wherein the adjustable lens is electrically connected to the first end by a gold wire;

13. The camera module according to any one of claims 2 to 5, wherein a plurality of first positioning portions are disposed at intervals on a side of the bracket facing the first barrel, a plurality of second positioning portions are disposed on an end surface of an object-side end of the first barrel corresponding to the first positioning portions, and each of the second positioning portions is connected to each of the first positioning portions in a fitting manner.

14. The camera module of claim 13, wherein one of the first positioning portion and the second positioning portion is a positioning hole, and the other of the first positioning portion and the second positioning portion is a positioning post.

15. The image capturing module according to any one of claims 2 to 5, wherein a first through groove is formed on a peripheral side surface of the image side end of the first barrel, the first through groove penetrates through a surface of the image side end of the first barrel facing the image side and a surface of the first barrel facing the object side, and the second end is at least partially located in the first through groove.

16. The camera module according to any one of claims 2 to 5, further comprising a base and an optical filter, wherein the base is disposed on the substrate, the base is provided with a second light hole, the second light hole is used for allowing light to irradiate the photosensitive element, the first lens barrel is disposed on a side of the base away from the substrate and is disposed corresponding to the second light hole, and the optical filter covers the second light hole.

17. The camera module of claim 16, wherein the peripheral side surface of the base is provided with a second through slot, the second through slot extending through the image side surface and the object side surface of the base, and the second end is at least partially located in the second through slot.

18. An electronic apparatus, characterized in that the electronic apparatus comprises an apparatus main body and the camera module according to any one of claims 2 to 17, the camera module being provided to the apparatus main body.

19. A method of assembling a camera module, which is applied to the camera module according to any one of claims 2 to 17, the method comprising:

mounting the photosensitive element onto the substrate;

positioning and assembling the bracket and the first mirror group;

and welding the second end of the electric connecting piece and the substrate to be electrically connected.