阅读说明：本技术 一种新型光模块透镜贴装结构 (Novel optical module lens pastes dress structure ) 是由 濮莉莉 于 2021-09-24 设计创作，主要内容包括：本发明涉及塑料透镜技术领域,具体为一种新型光模块透镜贴装结构,包括PCBA控制板、第一原始透镜主体和第二原始透镜主体,所述PCBA控制板的端部设置有大金垫,所述第一原始透镜主体的端部左右两侧对称安装有第一金属焊盘,所述第二原始透镜主体的端部左右对称开设有衔接槽,所述第二原始透镜主体的通过衔接槽安装有第二金属焊盘,通过使用新型透镜结构可以实现在线焊接,与传统的环氧树脂点胶和热固化方法相比,每片可节省1～2分钟的操作时间,节省人工成本,新型透镜结构所使用的焊接技术,对PCB表面污染不敏感,新的粘接结构采用焊接方式,降低了污染影响的风险,从而获得更好的粘接质量。(The invention relates to the technical field of plastic lenses, in particular to a novel optical module lens mounting structure which comprises a PCBA control board, a first original lens main body and a second original lens main body, wherein a large gold pad is arranged at the end part of the PCBA control board, first metal pads are symmetrically arranged at the left side and the right side of the end part of the first original lens main body, a connecting groove is symmetrically arranged at the left side and the right side of the end part of the second original lens main body, a second metal pad is arranged at the second original lens main body through the connecting groove, online welding can be realized by using the novel lens structure, compared with the traditional epoxy resin dispensing and thermosetting method, the novel optical module lens mounting structure can save the operation time of 1-2 minutes for each piece, save the labor cost, is insensitive to the welding technology used by the novel lens structure to the surface pollution of a PCB, and reduces the risk of pollution influence due to the adoption of the welding mode, thereby achieving better bonding quality.)

1. The utility model provides a novel optical module lens pastes dress structure, includes PCBA control panel (1), first original lens main part (2) and the original lens main part of second (3), its characterized in that: the end part of the PCBA control plate (1) is provided with a large gold pad (101), the end part of the first original lens main body (2) is provided with a first press-fitting groove (201), the first original lens main body (2) is provided with a first positioning groove (202) at the front side of the inner part of the first press-fitting groove (201), the left side and the right side of the end part of the first original lens main body (2) are symmetrically provided with first metal pads (203), the end part of the second original lens main body (3) is provided with a second press-fitting groove (301), the second original lens main body (3) is provided with a second positioning groove (302) at the front side of the inner part of the second press-fitting groove (301), the end part of the second original lens main body (3) is bilaterally symmetrically provided with a connecting groove (303), the side surface of the connecting groove (303) is vertically provided with a first connecting groove (304), and the middle part of the back surface of the second original lens main body (3) is provided with a second connecting groove (305), a second metal pad (306) is mounted on the second original lens body (3) through a joint groove (303).

2. The novel optical module lens mounting structure of claim 1, wherein: the first metal pad (203) is arranged to fit with the first original lens body (2), and the second metal pad (306) is arranged to fit with the second original lens body (3).

3. The novel optical module lens mounting structure of claim 1, wherein: the first original lens body (2) is welded or brazed with a lens through a first metal pad (203), and the second original lens body (3) is welded or brazed with a lens through a second metal pad (306).

4. The novel optical module lens mounting structure of claim 1, wherein: the second metal pad (306) is matched with the joint groove (303), and the inner side wall of the second metal pad (306) is provided with a joint block (307) corresponding to the first joint groove (304) and the second joint groove (305).

5. The novel optical module lens mounting structure of claim 1, wherein: the first original lens body (2) and the second original lens body (3) are two different optical module lens mounting structures.

6. The novel optical module lens mounting structure of claim 1, wherein: the first original lens body (2) and the second original lens body (3) are correspondingly welded with a big gold pad (101) at the end part of the PCBA control plate (1) through solder paste by laser.

Technical Field

The invention relates to the technical field of plastic lenses, in particular to a novel optical module lens mounting structure.

Background

At present, a lens mounting technology adopted in the optical module industry is mainly realized through a glue bonding process, whether CTE (coefficient of thermal expansion) between glue and a lens is matched or not needs to be considered, glue dispensing and glue curing need to be carried out for a long time in a manufacturing process, the production cycle is long, and if dirt such as scaling powder, oil stain and the like exist on the surface of a PCB (printed circuit board), the condition that the bonding strength is reduced in the process of bonding the lens and the PCBA by using the glue is possible, and finally the reliability test cannot be passed.

The adhesive of the mounted lens and the PCBA used in the traditional optical module is epoxy resin, the CTE of the epoxy resin is 58-87 ppm/K, the CTE of the PCBA is 12.5ppm/K, and the CTE difference of the epoxy resin and the PCBA is 3.65-5.96 times. At higher temperature variations, the geometry of the material changes to a different extent, creating stress between the epoxy and the PCBA. The serious consequences are that the lens can fall off and the optical module can fail, which causes customer complaints and goods returns. To reduce the consequences of CTE mismatch, a more CTE matched material is selected for the attachment material between the lens and the PCBA.

The traditional lens bonding needs to add other procedures after the lens coupling is completed, including manual filling of epoxy structural adhesive and oven thermosetting, which can greatly increase the manufacturing period and the operating cost of the product.

The traditional lens connection uses an epoxy resin bonding method to form intermolecular acting force so as to connect materials together. These forces include: intermolecular attractive forces (van der waals forces) and hydrogen bonding forces between polymer molecules.

In conventional lens bonding methods, the adhesion of the epoxy resin is affected by contamination (e.g., flux and oil), temperature and humidity changes. If the PCBA is polluted or the external environment is changed, after stress or aging, the risk that the lens falls or epoxy resin is layered exists, and therefore a novel optical module lens mounting structure is needed to improve the problems.

Disclosure of Invention

The present invention is directed to a novel optical module lens mounting structure, so as to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a novel optical module lens mounting structure comprises a PCBA control plate, a first original lens body and a second original lens body, wherein a large gold pad is arranged at the end part of the PCBA control plate, a first press-mounting groove is formed in the end part of the first original lens body, a first positioning groove is formed in the first original lens body and is positioned in the front of the first press-mounting groove, first metal bonding pads are symmetrically arranged on the left side and the right side of the end part of the first original lens body, a second press-mounting groove is formed in the end part of the second original lens body, a second positioning groove is formed in the second original lens body and is positioned in the front of the second press-mounting groove, a connecting groove is symmetrically formed in the left side and the right side of the end part of the second original lens body, a first connecting groove is vertically formed in the side face of the connecting groove, and a second connecting groove is formed in the middle of the back face of the second original lens body, and a second metal pad is arranged on the second original lens main body through the connecting groove.

As a preferable aspect of the present invention, the first metal pad is disposed to be fitted to the first original lens body, and the second metal pad is disposed to be fitted to the second original lens body.

In a preferred embodiment of the present invention, the first original lens body is welded or soldered with a lens by a first metal pad, and the second original lens body is welded or soldered with a lens by a second metal pad.

As a preferable aspect of the present invention, the second metal pad is disposed in a manner of being matched with the connecting groove, and the inner side wall of the second metal pad is provided with a connecting block corresponding to the first connecting groove and the second connecting groove.

As a preferable aspect of the present invention, the first original lens body and the second original lens body are two different optical module lens mounting structures.

In a preferred embodiment of the present invention, the first original lens body and the second original lens body are laser welded to a large gold pad at an end of the PCBA control board by solder paste.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the first metal bonding pad and the second metal bonding pad, compared with the traditional epoxy resin bonding method, the CTE matching degree of the lens with metal characteristics is higher after the lens is connected with the PCBA control board, the novel lens connection mode is that molten metal atoms are rearranged and bonded to generate a new metal bond, and the acting force of the metal bond is far greater than the hydrogen bond force and the van der Waals force, so that the mechanical reliability of metal welding is very high.

2. According to the invention, online welding can be realized by using the novel lens structure, compared with the traditional epoxy resin glue dispensing and thermosetting method, the operation time of 1-2 minutes can be saved for each lens, the labor cost is saved, the novel lens structure uses a welding technology, the bonding adhesion force of metal atoms is far greater than the hydrogen bonding force and van der Waals force of epoxy resin bonding, the welding technology used by the novel lens structure is insensitive to PCB surface pollution, and the new bonding structure adopts a welding mode, so that the risk of pollution influence is reduced, and better bonding quality is obtained.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of a first original lens body structure according to the present invention;

FIG. 3 is a schematic view of a first original lens body structure according to the present invention;

FIG. 4 is a schematic diagram of a second original lens body structure according to the present invention.

FIG. 5 is a schematic diagram of a second original lens body according to the present invention.

Fig. 6 is a schematic view of a second metal pad structure according to the present invention.

In the figure: 1. a PCBA control board; 101. a large gold pad; 2. a first original lens body; 201. a first press-fit groove; 202. a first positioning groove; 203. a first metal pad; 3. a second original lens body; 301. a second press-fit groove; 302. a second positioning groove; 303. a joining groove; 304. a first transfer groove; 305. a second transfer groove; 306. a second metal pad; 307. a connecting block.

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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-6, the present invention provides a technical solution:

a novel optical module lens mounting structure comprises a PCBA control plate 1, a first original lens body 2 and a second original lens body 3, wherein a large gold pad 101 is arranged at the end part of the PCBA control plate 1, a first press-mounting groove 201 is formed at the end part of the first original lens body 2, a first positioning groove 202 is formed in the first original lens body 2 and is positioned at the inner front side of the first press-mounting groove 201, first metal bonding pads 203 are symmetrically arranged at the left side and the right side of the end part of the first original lens body 2, a second press-mounting groove 301 is formed at the end part of the second original lens body 3, a second positioning groove 302 is formed in the second original lens body 3 and is positioned at the inner front side of the second press-mounting groove 301, connecting grooves 303 are symmetrically formed at the left side and the right side of the end part of the second original lens body 3, a first connecting groove 304 is vertically formed in the side surface of the connecting groove 303, a second connecting groove 305 is formed in the middle of the back surface of the second original lens body 3, the second original lens body 3 is mounted with a second metal pad 306 through a docking slot 303.

In the embodiment, referring to fig. 2-6, a first metal pad 203 is disposed to fit a first original lens body 2, a second metal pad 306 is disposed to fit a second original lens body 3, the first original lens body 2 is soldered or soldered with a lens through the first metal pad 203, the second original lens body 3 is soldered or soldered with a lens through the second metal pad 306, the second metal pad 306 is disposed to fit a connection groove 303, the inner sidewall of the second metal pad 306 is disposed with connection blocks 307 corresponding to the first connection groove 304 and the second connection groove 305, the lens with metal features has a higher CTE matching degree after being connected to a PCBA control board 1 through the first metal pad 203 and the second metal pad 306, compared to the conventional epoxy resin bonding method, the novel lens connection method is to rearrange and bond molten metal atoms to generate a new metal bond, the acting force of the metal bond is far greater than the hydrogen bonding force and van der waals force, the mechanical reliability of the metal welding is high.

In the embodiment, referring to fig. 1-6, the first original lens body 2 and the second original lens body 3 are two different optical module lens mounting structures, the first original lens body 2 and the second original lens body 3 are laser welded with the large gold pad 101 at the end of the PCBA control board 1 through solder paste, the novel lens structure can realize on-line welding, compared with the traditional epoxy resin glue dispensing and thermosetting method, the novel lens structure can save the operation time of 1-2 minutes and the labor cost, the novel lens structure uses the welding technology, the bonding and bonding force of metal atoms is far greater than the hydrogen bonding force and van der Waals force of epoxy resin bonding, the welding technology used by the novel lens structure, the novel bonding structure is insensitive to PCB surface pollution, and a welding mode is adopted, so that the risk of pollution influence is reduced, and better bonding quality is obtained.

The working principle is as follows: when the lens coupling device is used, the first original lens body 2 is welded or brazed with a lens through the first metal pad 203, the second original lens body 3 is welded or brazed with a lens through the second metal pad 306, at the moment, the CTE of a metal structure at the bottom of the lens is 15ppm/K, the CTE of solder is 25-30 ppm/K, the CTE of a PCB is 12.5ppm/K, the maximum difference of the CTE of the three is 1.4 times, compared with the original epoxy resin bonding, stress caused by temperature change can be greatly reduced, after the lens coupling is completed, the first original lens body 2 and the second original lens body 3 are correspondingly welded with the large gold pad 101 at the end part of the PCBA control board 1 through solder paste by laser, and after the coupling is completed, the on-line welding is directly carried out on a coupling machine, so that a large amount of operation time can be saved, the production cost of the step of the lens coupling is saved, and through the first metal pad 203 and the second metal pad 306, compared with the traditional epoxy resin bonding method, the CTE matching degree of the lens with metal characteristics is higher after the lens is connected with the PCBA control plate 1, the novel lens connecting method is that molten metal atoms are rearranged and bonded to generate a new metal bond, the acting force of the metal bond is far larger than the hydrogen bond force and the van der Waals force, so the mechanical reliability of metal welding is very high, online welding can be realized by using the novel lens structure, compared with the traditional epoxy resin spot gluing and thermosetting method, the operation time of each sheet can be saved by 1-2 minutes, the labor cost is saved, the novel lens structure uses the welding technology, the metal atom bonding force is far larger than the hydrogen bond force and the van der Waals force of epoxy resin bonding, the welding technology used by the novel lens structure is insensitive to the surface pollution of the PCB, the novel bonding structure adopts the welding method, the risk of pollution influence is reduced, thereby achieving better bonding quality.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.