Optical module and optical coupling lens

Abstract

The utility model discloses an optical module and an optical coupling lens, the optical module comprises a circuit board and an optical coupling lens arranged on the circuit board, the optical coupling lens comprises a bottom surface facing the circuit board and a side wall adjacent to the bottom surface, and the optical coupling lens also comprises a plurality of glue grooves arranged on the side wall, the optical coupling lens is glued with the circuit board through glue, and the glue extends and is embedded into the glue groove. In the process of gluing the optical coupling lens and the circuit board through the glue, the glue not only bonds the side wall of the optical coupling lens and the circuit board, but also is embedded into the glue groove of the side wall, and cohesive force in all directions is formed on the optical coupling lens, so that the optical coupling lens and the circuit board are bonded more firmly, and the optical module is more stable and reliable in the long-term use process.

Description

Technical Field

[0001] The utility model relates to the field of optical communication, in particular to an optical module and an optical coupling lens. Background Art

[0002] In the field of optical communication, optical modules are important devices for achieving photoelectric conversion. Optical modules generally include optical coupling lenses, optical fiber connectors, and circuit boards. The optical coupling lenses are fixedly connected to the circuit boards through colloids. Due to the process and the need for possible rework, the optical fiber connectors and optical coupling lenses are generally pluggable. Figure 1 As shown, the upper optical coupling lens 20' can be aligned with the lower circuit board 10' first, and then glue is applied around the optical coupling lens 20' to fix it, the optical fiber connector 30' is aligned and connected with the optical coupling lens 20', and the optical fiber connector 30' and the optical coupling lens 20' are clamped by the buckle 50'.

[0003] During the assembly process of the above optical module, the inventors found that the prior art has the following problems:

[0004] Since the optical coupling lens 20' is relatively smooth around and has relatively insufficient adhesion to the colloid, during reliability testing of the optical module, installation of the buckle 50', or plugging and unplugging of the optical fiber connector 30' and the optical coupling lens 20', a force away from the circuit board 10' will be applied to the optical coupling lens 20', which may cause the optical coupling lens 20' to peel off from the colloid, making the product scrapped. Even if some peeling is relatively minor and is not subsequently detected, it will cause a risk of reliability of adhesion between the optical coupling lens 20' and the circuit board 10' during the long-term use of the optical module, and may also cause the coupling light path to deviate, thereby causing the problem of light loss. Summary of the invention

[0005] In order to solve the problem of reliability of bonding between optical coupling lenses and circuit boards in the prior art, the utility model aims to provide an optical module and an optical coupling lens with more stable and reliable connection.

[0006] To achieve the above-mentioned utility model object, an embodiment of the utility model provides an optical module, including a circuit board and an optical coupling lens arranged on the circuit board, wherein the optical coupling lens includes a bottom surface facing the circuit board and a side wall adjacent to the bottom surface;

[0007] The optical coupling lens further comprises a plurality of adhesive grooves arranged on the side wall, wherein the adhesive grooves have a bottom wall higher than the bottom surface;

[0008] The optical module also includes a colloid for bonding the optical coupling lens and the circuit board. The colloid is at least filled in the junction between the side wall of the optical coupling lens and the circuit board, and extends and is embedded in the glue groove.

[0009] As a further improvement of the present utility model, the side wall includes a first side wall, a second side wall, a third side wall and a fourth side wall. The optical coupling lens further includes a connecting portion for connecting an optical fiber connector, and the connecting portion is disposed on the third side wall. The first side wall and the second side wall are respectively adjacent to both sides of the third side wall, the fourth side wall is connected between the first side wall and the second side wall, and at least two of the first side wall, the second side wall, the third side wall and the fourth side wall are provided with the glue grooves.

[0010] As a further improvement of the present utility model, a plurality of the glue grooves are provided on each of the first side wall, the second side wall, the third side wall and the fourth side wall.

[0011] As a further improvement of the present utility model, the colloid at least coats the bottom wall, the part of the circuit board adjacent to the side wall, and the side wall between the bottom wall and the circuit board.

[0012] As a further improvement of the present utility model, the height of the colloid is higher than the top end of the glue groove, and the colloid fills the glue groove.

[0013] As a further improvement of the present utility model, the glue groove is provided as a circular blind hole or a rectangular blind hole.

[0014] As a further improvement of the present utility model, the plurality of glue grooves are equidistantly arranged on the side wall.

[0015] As a further improvement of the present utility model, the glue groove is recessed on the outer surface of the side wall, and the thickness of the side wall is greater than the depth of the glue groove provided on the side wall.

[0016] As a further improvement of the present utility model, the optical module further includes a buckle and an optical fiber connector; the optical coupling lens includes a main body and a supporting portion. The main body includes a lens array, a reflecting surface and a coupling surface. The lens array faces the circuit board, the coupling surface is used for docking with the optical fiber connector, the reflecting surface is located between the lens array and the coupling surface, and the reflecting surface is used for deflecting the direction of light transmission between the coupling surface and the lens array to reflect the light received by the coupling surface onto the lenses of the lens array and / or reflect the light output from the lens array to the coupling surface;

[0017] The supporting portion is used for supporting the main body, so that the lens array of the main body is suspended above the circuit board, the bottom surface is located at the bottom of the supporting portion, and the side wall is located on the side surface of the supporting portion;

[0018] The buckle is clamped on the main body to detachably fix the optical fiber connector and the optical coupling lens.

[0019] To achieve one of the above-mentioned utility model purposes, an embodiment of the present utility model provides an optical coupling lens, which includes a bottom surface and a side wall adjacent to the bottom surface. The optical coupling lens further includes a plurality of glue grooves provided on the side wall. The glue grooves have a bottom wall higher than the bottom surface. The glue grooves are configured such that when the optical coupling lens is bonded to an external substrate, a part of the bonding colloid is embedded into the glue grooves.

[0020] Compared with the conventional technology, the present utility model has the following beneficial effects: During the process of gluing the optical coupling lens and the circuit board with colloid, the colloid is simultaneously embedded into the glue grooves on the side wall, forming a grip on the optical coupling lens, which plays a better fixing role for the optical coupling lens. When the optical coupling lens has a tendency to separate from the circuit board under an external force, the colloid not only exerts the bonding force between the colloid and the side wall on the optical coupling lens, but also exerts a supporting force of the colloid on the bottom wall of the glue groove. And since the bonding between the colloid and the inner wall of the glue groove includes bonding in directions other than perpendicular to the bottom wall, the colloid embedded in the glue grooves on the side wall of the optical coupling lens can overcome the separating forces of the optical coupling lens in multiple directions, forming a clamping force in all directions on the optical coupling lens. Thus, the bonding between the optical coupling lens and the circuit board can be made more firm, and the optical module is also more stable and reliable during long-term use, and the coupling optical path is not likely to deviate. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of an optical module of the prior art;

[0022] Figure 2 is a schematic structural diagram of an optical module according to an embodiment of the present utility model;

[0023] Figure 3 is an exploded view of an optical module according to an embodiment of the present utility model;

[0024] Figure 4 is a top view of an optical module according to an embodiment of the present utility model;

[0025] Figure 5 is Figure 4 a cross-sectional view taken along the A-A direction in

[0026] Figure 6 is a side view of an optical module according to an embodiment of the present utility model;

[0027] Figure 7 is a side view of an optical module according to another embodiment of the present utility model;

[0028] Among them, 10', circuit board; 20', optical coupling lens; 30', fiber optic connector; 50', buckle;

[0029] 100. Optical module; 10. Circuit board; 20. Optical coupling lens; 21. Side wall; 211. First side wall; 212. Second side wall; 213. Third side wall; 214. Fourth side wall; 22. Glue groove; 220. Bottom wall; 221. First glue groove; 222. Second glue groove; 223. Circular blind hole; 224. Rectangular blind hole; 23. Bottom surface; 24. Main body; 25. Connection part; 26. Support part; 30. Fiber optic connector; 40. Colloid; 50. Buckle; 60. Optical fiber. Detailed implementation manners

[0030] The following will describe the present utility model in detail in conjunction with the specific implementation manners shown in the drawings. However, these implementation manners do not limit the present utility model, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these implementation manners is included in the protection scope of the present utility model.

[0031] It should be understood that the spatially relative terms, such as "upper", "above", "lower", "below", etc., used herein are for the purpose of facilitating description to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. The spatially relative terms may be intended to include different orientations of the device in use or operation in addition to the orientation shown in the figures.

[0032] An embodiment of the present utility model provides an optical module and an optical coupling lens with more stable and reliable connection. The optical module aims to improve the structure of the optical coupling lens and its bonding method with the circuit board to enhance the bonding strength between the two, thereby improving the reliability and stability of the entire optical module.

[0033] Figure 2 and Figure 3 Fig. shows a schematic structural diagram of an embodiment of the optical module 100. The optical module 100 includes a circuit board 10 and an optical coupling lens 20. The optical coupling lens 20 is fixed on the circuit board 10. The optical coupling lens 20 includes a bottom surface 23 and a side wall 21 adjacent to the bottom surface 23. The bottom surface 23 faces the circuit board 10. The optical coupling lens 20 is generally in a cuboid structure. The side wall 21 is substantially perpendicular to the bottom surface 23. An approximately right-angle is formed at the intersection of the side wall 21 and the circuit board 10. The colloid 40 is filled at the intersection, that is, the colloid 40 is filled at the intersection of the side wall 21 of the optical coupling lens 20 and the circuit board 10. An optical transceiver component is arranged on the circuit board 10, and the optical coupling lens 20 is aligned with the optical transceiver device. Specifically, in this embodiment, the optical transceiver device includes a laser chip and a photodetector chip, which are located below the optical coupling lens 20, and the lens array of the optical coupling lens 20 is optically aligned with the laser chip and the photodetector chip.

[0034] In addition, the optical module 100 further includes an optical fiber connector 30. The optical fiber connector 30 is used to fix the optical fiber 60 and is coupled to the optical coupling lens 20 to realize the transmission of optical signals between the optical fiber 60 and the optical coupling lens 20. The optical fiber connector 30 is inserted into the optical coupling lens 20 along the first direction and is detachably connected to the optical coupling lens 20. Here, the optical fiber connector 30 can be inserted parallel to the bottom surface 23 or can have an inclined angle with the bottom surface 23, that is, the first direction is not limited to Figure 2 and 3 the direction parallel to the bottom surface in

[0035] To clearly express the positions and directions described in this embodiment, in this embodiment, the optical coupling lens 20 is located above the circuit board 10, and the opposite direction is below. The direction perpendicular to the bottom surface 23 is the up and down direction. In addition, the first direction can be the left direction, and the opposite direction is the right direction. One side perpendicular to the plane where up, down, left, and right are located is the rear direction, and the opposite direction is the front direction.

[0036] In this embodiment, the optical coupling lens 20 further includes a plurality of glue grooves 22 provided on the side wall 21. The glue grooves 22 have a bottom wall 220 higher than the bottom surface 23; the colloid 40 is at least filled at the junction of the side wall 21 of the optical coupling lens 20 and the circuit board 10 and extends and is embedded in the glue grooves 22.

[0037] The glue grooves 22 are provided at positions close to the lower edge of the side wall 21. Since the bottom wall 220 of the glue grooves 22 is higher than the bottom surface 23, the colloid 40 at least covers the side surface between the bottom surface 23 and the bottom wall 220, and at least part of the space in the circuit board 10 and the glue grooves 22. On the one hand, the colloid 40 exerts an adhesive force on the side wall 21, the glue grooves 22, and the circuit board 10. On the other hand, the colloid 40 can exert a supporting force on the glue grooves 22, at least on the bottom wall 220 of the glue grooves 22, so as to form a clamping force in all directions on the optical coupling lens and prevent the optical coupling lens 20 from separating or being misaligned with the circuit board 10. Taking the example of applying a force in the direction away from the circuit board 10 to the optical coupling lens 20, the supporting force exerted by the colloid 40 on the glue grooves 22 is at least reflected in the force exerted on the bottom wall 220 in the direction towards the circuit board 10, that is, a clamping force towards the circuit board 10 is applied to the optical coupling lens 20, thereby preventing the optical coupling lens 20 from separating from the circuit board 10. Therefore, the colloid 40 is embedded in the glue grooves 22, enhancing the bonding strength between the optical coupling lens 20 and the circuit board 10.

[0038] During the assembly process, the colloid 40 is coated or injected into the junction of the side wall 21 of the optical coupling lens 20 and the circuit board, as well as into the glue grooves 22, to ensure that the colloid 40 can penetrate into the glue grooves 22 and form glue columns or glue nails in the glue grooves 22 to form a firm bonding structure.

[0039] In this embodiment, the colloid 40 at least coats the bottom wall 220, the part of the circuit board 10 adjacent to the side wall, and the side wall 21 between the bottom wall 220 and the circuit board 10. More specifically, in the vertical direction perpendicular to the bottom wall 220, the colloid 40 at least coats the bottom wall 220, a part of the side wall 21 below the bottom wall, and a part of the circuit board 10 below a part of the side wall 21. At the position where the glue groove 22 is located, the colloid 40 extending in the horizontal direction and the vertical direction is formed simultaneously.

[0040] Further, the optical coupling lens 20 further includes a main body 24. The side wall 21 is located on the side surface 21 of the main body 24. The main body 24 includes a lens array, a reflection surface, and a coupling surface. The lens array faces the circuit board 10. The coupling surface is used for docking with the fiber optic connector 30. The reflection surface is located between the lens array and the coupling surface. The reflection surface is used to deflect the direction of light transmission between the coupling surface and the lens array, so as to reflect the light received by the coupling surface onto the lenses of the lens array and / or reflect the light output from the lens array to the coupling surface.

[0041] The optical module 100 further includes a buckle 50. The buckle 50 is clamped on the main body 24 to detachably fix the fiber optic connector 30 and the optical coupling lens 20. When the process requirements or rework are needed, the buckle 50 can be removed to separate the fiber optic connector 30 and the optical coupling lens 20.

[0042] The optical coupling lens 20 further includes a support portion 26, as Figure 5 shown. The support portion 26 is used to support the main body 24, so that the lens array of the main body 24 is suspended above the circuit board 10 to avoid the laser chip and the photodetector chip. The bottom surface 23 of the optical coupling lens is located at the bottom of the support portion 26, and the side wall 21 is located on the side surface of the support portion 26.

[0043] As Figure 4 shown, the side wall 21 includes a first side wall 211, a second side wall 212, a third side wall 213, and a fourth side wall 214 respectively located on four side surfaces of the main body 24. As Figure 3 shown, the optical coupling lens 20 further includes a connecting portion 25 for connecting the fiber optic connector 30. The connecting portion 25 is provided on the third side wall 213. As Figure 2 and 3 shown, the connecting portion 25 can be set as a through hole, and the fiber optic connector 30 is connected to the optical coupling lens 20 in a way of inserting into the through hole.

[0044] The first side wall 211 and the second side wall 212 are respectively adjacent to both sides of the third side wall 213. The fourth side wall 214 is connected between the first side wall 211 and the second side wall 212. At least two of the first side wall 211, the second side wall 212, the third side wall 213, and the fourth side wall 214 are provided with glue grooves 22, so that the optical coupling lens 20 is held against the circuit board 10 from multiple sides.

[0045] Further, a plurality of glue grooves 22 are provided on the first side wall 211, the second side wall 212, the third side wall 213, and the fourth side wall 214. As shown in Figure 3 the figure, the four side walls of the optical coupling lens 20 and a plurality of positions on each side wall are tightly held together with the circuit board 10 by the colloid 40, maximizing the bonding effect of the colloid 40.

[0046] As shown in Figure 3 and 4 the figure, the first side wall 211 and the second side wall 212 both extend in the left - right direction, and glue grooves 22 are provided on both the first side wall 211 and the second side wall 212. The first side wall 211 and the second side wall 212 are two opposite side walls 21. By restricting the optical coupling lens 20 in two opposite directions, its connection is made firm.

[0047] More specifically, the optical coupling lens 20 includes a first glue groove 221 on the first side wall 211. The first glue groove 221 extends into the interior of the optical coupling lens 20 in the backward direction, and the colloid 40 is embedded into the first glue groove 221 backward. The colloid 40 enters the interior of the main body 24 of the optical coupling lens 20. While bonding the circuit board 10, the optical coupling lens 20 can be firmly fixed on the circuit board 10. The bonding between the colloid 40 and the first glue groove 221 can form a holding force in all directions except the backward direction in addition to applying the bonding force.

[0048] For example, when an upward force is applied to the optical coupling lens 20, the holding force exerted by the colloid 40 on the bottom wall 220 of the first glue groove 221 increases, forming a tendency to prevent the optical coupling lens 20 from moving upward. When a leftward force is applied to the optical coupling lens 20, the holding force exerted by the colloid 40 on the right - hand inner wall of the first glue groove 221 increases, forming a tendency to prevent the optical coupling lens 20 from moving leftward. When a forward force is applied to the optical coupling lens 20, the resistance between the colloid 40 and the first glue groove 221 prevents the optical coupling lens 20 from moving forward.

[0049] That is, by providing the glue groove 22 extending into the optical coupling lens 20 and the structure in which the colloid 40 is embedded in the glue groove 22, through the cooperation between the colloid 40 and the glue groove 22, in addition to forming the bonding force, a holding force that hinders the optical coupling lens 20 from moving in directions other than the backward direction can be formed.

[0050] Further, as shown in Figure 5 the figure, the optical coupling lens 20 further includes a second glue groove 222 on the second side wall 212. The second glue groove 222 extends into the interior of the optical coupling lens 20 in the forward direction, and the colloid 40 is embedded into the second glue groove 222 forward.

[0051] Similarly, the cooperation between the colloid 40 and the second glue groove 222 can, in addition to forming an adhesive force, also form a resisting force that hinders the movement of the optical coupling lens 20 in directions other than the front. Moreover, through the cooperation between the colloid 40 and the first glue groove 221 and the second glue groove 222 respectively, by forming resisting forces in the forward and backward directions simultaneously, in addition to the inherent adhesive force of the colloid 40 itself, a resisting force that hinders the movement of the optical coupling lens 20 in all directions can be formed.

[0052] That is, when the resisting force is sufficient, in this embodiment, at least one glue groove 22 only needs to be provided on each of the first side wall 211 and the second side wall 212. Through the structure in which the colloid 40 is embedded in the glue groove 22, the effect of preventing the optical coupling lens 20 from moving in any direction can be achieved. This design ensures that the force applied to the optical coupling lens 20 from any direction can be resisted through the interaction between the colloid 40 and the glue groove 22, thereby reducing the risk of structural damage or performance degradation caused by operation errors or external forces, enhancing the stability and strength of the bonding between the optical coupling lens 20 and the circuit board 10, and thus improving the reliability of the optical module 100.

[0053] In addition, glue grooves 22 are provided on both the third side wall 213 and the fourth side wall 214. That is to say, glue grooves 22 are provided on all four side walls 21 of the optical coupling lens 20, and the colloid 40 is embedded in the glue grooves 22 on all four side walls 21, forming an all-round fixation of the optical coupling lens 20.

[0054] Furthermore, the glue groove 22 is recessed on the outer surface of the side wall 21, and the thickness of the side wall 21 is greater than the depth of the glue groove 22 provided on the side wall 21. The thicknesses of the four side walls 21 in this embodiment can be different. Through the defined relationship between the thickness of the side wall 21 and the depth of the glue groove 22, it can be ensured that the glue groove 22 on each side wall 21 does not penetrate the side wall 21.

[0055] On the one hand, the glue groove 22 is recessed in the side wall, without additionally occupying the wiring area of the circuit board 10. While playing the role of firm connection, it does not affect the surface wiring of the circuit board 10, that is, while solving the problem of weak bonding, other problems such as a reduction in the wiring area are not introduced. On the other hand, the thickness of the side wall 21 is greater than the depth of the glue groove 22. When dispensing glue, it can prevent the glue from penetrating into the inside of the coupling lens and contaminating the optical surface of the coupling lens.

[0056] The glue groove 22 can be set as a circular blind hole 223 or a rectangular blind hole 224, or the circular blind hole 223 and the rectangular blind hole 224 are arranged alternately. Both the circular blind hole 223 and the rectangular blind hole 224 can play a role in firmly connecting the optical coupling lens 20 in all directions of the cross-section of the hole. The circular blind hole 223 is as Figure 6 shown, and the rectangular blind hole 224 is as Figure 7 shown.

[0057] In addition, through Figure 6 and Figure 7 It can also be seen that in this embodiment, the glue groove 22 can be set relatively large so that the colloid 40 can cover the bottom wall 220 of the glue groove 22. Figure 7 As shown, the glue groove 22 can also be set relatively low and small, so that the glue 40 fills the glue groove 22, as shown in FIG. Figure 6 That is to say, the height of the colloid 40 to the circuit board 10 is higher than the bottom wall 220, and the colloid 40 can be filled into part of the space of the glue groove 22, or can fill the glue groove 22 completely, that is, the height of the colloid 40 to the circuit board 10 can be higher than the bottom wall 220 and lower than the top of the glue groove 22, or can be higher than the top of the glue groove 22.

[0058] Furthermore, each side wall is provided with a plurality of glue grooves, and a plurality of glue grooves 22 are equidistantly arranged on the side wall 21, so that when a force driving the optical coupling lens 20 to move occurs, a more uniform force to overcome the movement can be applied thereto, thereby ensuring the reliability of the optical module 100.

[0059] In the following, taking the case where the four side walls 21 of the optical coupling lens 20 are all provided with glue grooves 22 as an example, the assembly method of the optical module 100 includes the following steps:

[0060] First, the optical coupling lens 20 is placed on the circuit board 10 , and the position of the optical coupling lens 20 is adjusted so that the lens array thereof is aligned with the optical transceiver on the circuit board 10 .

[0061] Next, the optical coupling lens 20 is fixed on the circuit board 10 by gluing with the colloid 40. Specifically, glue is dispensed on the four side walls 21 of the optical coupling lens 20. When the height of the glue groove 22 is lower than the height of the existing colloid, the colloid 40 will naturally flow into the glue groove 22, and the colloid 40 will at least cover the bottom wall 220. When the height of the glue groove 22 is higher than the height of the existing colloid, the height of the colloid 40 is appropriately increased, or at least the height of the colloid 40 is increased near the glue groove 22, until the colloid 40 is injected into the glue groove 22 and covers the bottom wall 220. Preferably, the colloid 40 fills the glue groove 22.

[0062] Then, the colloid 40 is cured so that the optical coupling lens 20 is firmly fixed on the circuit board 10 .

[0063] Finally, the optical fiber connector 30 connected with the optical fiber is inserted into the optical coupling lens 20 , and the buckle 50 is put on to clamp the optical fiber connector 30 and the optical coupling lens 20 .

[0064] In subsequent processes or reassembly, when the optical fiber connector 30 is repeatedly plugged in and out, the optical coupling lens 20 is always firmly fixed on the circuit board 10 .

[0065] Compared with the prior art, the present embodiment has the following beneficial effects:

[0066] (1)Enhanced adhesion: By providing a plurality of glue grooves 22 on the side wall 21 of the optical coupling lens 20, the colloid 40 can fill into these glue grooves 22, thereby forming anchoring points inside the side wall 21 of the optical coupling lens 20. This structure not only increases the gripping force of the colloid 40, but also provides stronger mechanical support for the connection between the optical coupling lens 20 and the circuit board 10 through internal anchoring, effectively preventing the optical coupling lens 20 from falling off the circuit board 10 due to the peeling of the colloid 40. Therefore, when the optical fiber connector 30 is inserted and removed from the optical coupling lens 20 due to process or inspection requirements, or when the optical fiber connector 30 needs to be disassembled and assembled due to rework, there is no need to worry about the loosening of the connection of the optical coupling lens 20 caused by the insertion and removal, nor about damaging the circuit board 10 or other components.

[0067] (2)Improved long-term stability: The presence of the glue grooves 22 increases the contact area between the colloid 40 and the optical coupling lens 20, and the structure formed after the colloid 40 is cured is more complex, which can form a holding force in all directions on the optical coupling lens 20, effectively resisting the stress caused by mechanical vibration or temperature change, and improving the reliability of the optical module 100.

[0068] (3)Do not additionally occupy the surface wiring area of the circuit board 10: The glue grooves 22 are recessed in the outer surface of the side wall 21. This structure plays a role in firmly connecting without additionally occupying the surface wiring area of the circuit board 10, and solves the problem of poor bonding without introducing other problems such as a reduction in the wiring area.

[0069] (4)Small modification with great effect: Only by providing one glue groove 22 in each of two opposite directions, and through the scheme of embedding the colloid 40 into the glue groove 22, the effect of overcoming the movement of the optical coupling lens 20 in any direction can be achieved, ensuring that the force applied to the optical coupling lens 20 from any direction can be resisted through the interaction between the colloid 40 and the glue groove 22, thereby reducing the risk of structural damage or performance degradation caused by operation errors or external forces, and maintaining the stability and strength of the optical module 100.

[0070] In summary, the present embodiment can make the fixation of the optical coupling lens and the circuit board more firm, and the optical module is more stable and reliable during long-term use, significantly enhancing the competitiveness of the optical module product in the market, especially in communication equipment requiring high reliability. The application of this technology is expected to promote the performance stability and reliability of optical communication equipment under various environmental conditions, especially in data centers and long-distance optical fiber communication systems.

[0071] It should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0072] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical module, comprising a circuit board and an optical coupling lens disposed on the circuit board, wherein the optical coupling lens comprises a bottom surface facing the circuit board and a side wall adjacent to the bottom surface; characterized in that: The optical coupling lens further comprises a plurality of adhesive grooves arranged on the side wall, wherein the adhesive grooves have a bottom wall higher than the bottom surface; The optical module also includes a colloid for bonding the optical coupling lens and the circuit board. The colloid is at least filled in the junction between the side wall of the optical coupling lens and the circuit board, and extends and is embedded in the glue groove.

2. The optical module according to claim 1, characterized in that: The side walls include a first side wall, a second side wall, a third side wall and a fourth side wall. The optical coupling lens also includes a connecting portion for connecting an optical fiber connector, the connecting portion is arranged on the third side wall, the first side wall and the second side wall are respectively adjacent to two sides of the third side wall, the fourth side wall is connected between the first side wall and the second side wall, and at least two of the first side wall, the second side wall, the third side wall and the fourth side wall are provided with the glue groove.

3. The optical module according to claim 2, characterized in that: A plurality of the glue grooves are arranged on the first side wall, the second side wall, the third side wall and the fourth side wall.

4. The optical module according to claim 1, characterized in that: The colloid covers at least the bottom wall, a portion of the circuit board adjacent to the side wall, and the side wall between the bottom wall and the circuit board.

5. The optical module according to claim 4, characterized in that: The height of the colloid is higher than the top of the glue groove, and the colloid fills the glue groove.

6. The optical module according to claim 1, characterized in that: The glue groove is configured as a circular blind hole or a rectangular blind hole.

7. The optical module according to claim 1, characterized in that: The plurality of glue grooves are arranged on the side wall at equal intervals.

8. The optical module according to claim 1, characterized in that: The glue groove is recessed on the outer surface of the side wall, and the thickness of the side wall is greater than the depth of the glue groove arranged on the side wall.

9. The optical module according to claim 1, characterized in that: The optical module further includes a buckle and an optical fiber connector; the optical coupling lens includes a main body and a supporting portion, the main body includes a lens array, a reflecting surface and a coupling surface, the lens array faces the circuit board, the coupling surface is used to dock with the optical fiber connector, the reflecting surface is located between the lens array and the coupling surface, and the reflecting surface is used to deflect the direction of light transmission between the coupling surface and the lens array, so as to reflect the light received by the coupling surface onto the lens of the lens array and / or reflect the light output by the lens array onto the coupling surface; The support portion is used to support the main body so that the lens array of the main body is suspended on the circuit board, the bottom surface is located at the bottom of the support portion, and the side wall is located at the side of the support portion; The buckle is mounted on the main body to detachably fix the optical fiber connector and the optical coupling lens.

10. An optical coupling lens, comprising a bottom surface and a side wall adjacent to the bottom surface, characterized in that: The optical coupling lens also includes a plurality of glue grooves arranged on the side wall, wherein the glue groove has a bottom wall higher than the bottom surface, and the glue groove is configured so that when the optical coupling lens is bonded to an external substrate, the bonded colloid part is embedded in the glue groove.

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