Mold, lens module and sensor device

Abstract

The utility model relates to the technical field of semiconductor luminescence, and discloses a mold, a lens module and a sensor device. The mold comprises an upper mold and a lower mold, and the upper mold and the lower mold are respectively provided with a mold cavity for closing and forming the light-transmitting glue between the upper mold and the lower mold. Limiting plates used for mold closing and positioning are arranged on the sides, away from the mold cavity, of the upper mold and the lower mold. According to the die, the upper die and the lower die which are separated from each other are arranged, the lens is formed in a die assembly forming mode of the upper die and the lower die, the structure is simple and reasonable, and die assembly and demolding are easy. The manufacturing method of the lens module is simple and efficient, and the light control effect is good. The sensor device provided by the utility model has the advantages of simple and stable structure, good sealing performance, high precision and easy optical design.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductor light emitting, and specifically relates to a mold, a lens module and a sensor device. Background Art

[0002] The sensor device that integrates at least two optical chips 5 for emitting light and receiving light usually uses a light-absorbing structure made of opaque material to isolate the emitted light and the received light in order to prevent them from interfering with each other (refer to Fig.21 ), the structure and manufacturing method of the existing sensor device are as follows:

[0003] Prior art 1:

[0004] Step A1: Refer to Fig.16 At least two optical chips 5 are fixed on the substrate 4, and a transparent lens 2 is covered above the optical chip 5. The lens 2 has the function of encapsulating the optical chip 5 and adjusting the outgoing light and the received light.

[0005] Step A2: Refer to Fig.17 , a second groove 6 is cut on the lens 2 between the light emitting chip and the photosensitive chip and around the light emitting chip and the photosensitive chip, so that the substrate 4 in the area where the second groove 6 is located is exposed, so that the receiving part 1 formed in the later process can be directly connected to the substrate 4. This setting is because the bonding between the receiving part 1 and the lens 2 is not as strong as the bonding between the receiving part 1 and the substrate 4.

[0006] Step A3: Cover the receiving portion 1 directly in the second groove 6 or in the second groove 6 and the adjacent side and part of the top surface of the lens 2 by dispensing, injection molding or molding, referring to Fig.18 The receiving portion 1 has the function of preventing the light emitted by the light-emitting chip and the light-sensitive chip from interfering with each other and mixing.

[0007] The method of the prior art 1 directly forms the receiving portion 1 in the second groove 6 by dispensing, injection molding or molding, which is simple to manufacture and has good sealing performance. However, there is a problem that the receiving portion 1 and the lens 2 are easily separated due to stress, resulting in poor stability of the entire structure.

[0008] Prior art 2: Steps A1 and A2 are the same as prior art 1, except for step A3. Fig.19 Step A3: prefabricate the receiving portion 1 matching the second groove 6, apply adhesive to the bottom of the receiving portion 1, insert the receiving portion 1 into the second groove 6 and glue it to the substrate 4, and form a Fig. 20 sensor devices.

[0009] The method of the second prior art is to pre-fabricate the receiving portion 1, and then assemble the receiving portion 1 with the substrate 4 fixed with the lens 2. Since the receiving portion 1 is only fixedly connected to the substrate 4 and not connected to the lens 2, there is no stress-detachment problem with the lens 2. Existing problems: 1. Since the size of the second groove 6 is small, the processing accuracy of the receiving portion 1 and the assembly accuracy of the receiving portion 1 and the second groove 6 are very high, the processing difficulty is large, and the yield and production efficiency are low. 2. Since it is assembled, there is a space margin for assembly between the side wall of the receiving portion 1 and the side wall of the second groove 6, so the sealing is poor.

[0010] Based on the above, the problems to be solved at present are: to provide a mold for making a lens module with a simple process and high efficiency; to provide a lens module with a stable structure and good sealing and a sensor device with high precision. Utility Model Content

[0011] The purpose of the utility model is to provide a mold, a lens module and a sensor device, aiming to solve the problems in the prior art that the molding process of the lens and the receiving part of the lens module is complicated, the production efficiency is low, the reliability and sealing of the lens module are poor, and the accuracy of the sensor device is not high.

[0012] The utility model is implemented in this way: a method for manufacturing a lens module comprises the following steps:

[0013] Step S1, the receiving part is provided with at least two cavity structures with upper and lower openings; the upper mold and the lower mold are respectively provided with a mold cavity with one side opening; the mold cavities of the upper mold and the lower mold are respectively extended from the upper and lower opening ends of the receiving part into the cavity structure for alignment and mold closing, and a gap is left between the upper mold and the lower mold during the mold closing process;

[0014] Step S2, filling the mold cavity of the mold with light-transmitting glue, and the excess light-transmitting glue flows out through the gap around the upper mold and the lower mold, and adheres to the inner wall of the receiving part;

[0015] Step S3: After curing, remove the upper mold and the lower mold to form a lens in the cavity structure, wherein the lens at least includes a first lens and a second lens formed in different cavity structures.

[0016] Furthermore, before step S1, step S0 is also included;

[0017] Step S0: distributing the light-transmitting glue into the mold cavity of the upper mold and / or the lower mold.

[0018] Furthermore, a first groove is provided on the inner wall of the cavity structure in step S2 corresponding to the gap between the upper mold and the lower mold; the mold cavity is filled with translucent glue, and excess translucent glue flows out through the gap around the upper mold and the lower mold, and flows into the first groove and the inner wall of the receiving part to bond.

[0019] Furthermore, in step S2, the mold cavity after mold closing is filled with light-transmitting glue by injection molding.

[0020] A mold, the mold used in the manufacturing method of the lens module, includes an upper mold and a lower mold, the upper mold and the lower mold are respectively provided with a mold cavity for light-transmitting glue to be molded between the upper mold and the lower mold; the upper mold and the lower mold are provided with a limit plate for mold positioning on the side away from the mold cavity.

[0021] Furthermore, the length of the limiting plate is greater than the length between the inner walls on both sides of the corresponding cavity structure, so as to be clamped at the end of the cavity structure during the mold closing process.

[0022] A lens module, a lens module manufactured by the manufacturing method of the lens module, comprising:

[0023] The receiving portion is provided with at least two cavity structures with upper and lower openings;

[0024] The lens comprises at least a first lens and a second lens, wherein the first lens and the second lens are respectively arranged in the two cavity structures; the lens is an optical functional area, which is used for optically adjusting the outgoing light and / or the received light.

[0025] Furthermore, the receiving portion is a non-optical functional area, which is used to support the lens and isolate the light from the first lens and the second lens.

[0026] Furthermore, the inner wall of the receiving portion is provided with a first groove for connecting the four edges of the lens.

[0027] A sensor device, using the lens module, further comprising:

[0028] A substrate, which is disposed below the lens;

[0029] The optical chip comprises a light emitting chip for emitting light and a photosensitive chip for receiving light; the light emitting chip is arranged on the substrate and below the first lens; the photosensitive chip is arranged on the substrate and below the second lens.

[0030] Compared with the prior art, the mold, lens module and sensor device provided by the utility model have the following beneficial effects:

[0031] The manufacturing method of the sensor device of the utility model adopts the method of pre-forming the lens 2 in the cavity structure 11 of the receiving part 1, reserving a space for packaging the optical chip 5 at the bottom of the lens 2, and bonding the bottom or the bottom and part of the side of the receiving part 1 to the substrate 4. Compared with the prior art 1 and 2 of the utility model, 1. The manufacturing method of the utility model fixes the lens 2 on the receiving part 1 while forming the lens 2, and the process is simple and efficient. 2. The receiving part 1 of the utility model is firmly combined with the substrate 4. 3. The process of cutting the second groove 6 is saved, and the production process is simple. 4. The manufacturing accuracy and assembly accuracy requirements are low, the yield is high, and the sealing is good and the precision is high.

[0032] The lens module of the utility model includes a lens 2 with optical functions and a receiving part 1 for preventing light from lenses 2 in different optical function areas from interfering with each other. The first lens 21 and the second lens 22 are pre-arranged in the cavity structure 11 of the receiving part 1. Compared with the prior art one and two, the lens 2 is not connected to the substrate 4 and no longer relies on the support of the substrate 4, which will not affect the connection between the receiving part 1 and the substrate 4. The stability of the bonding between the receiving part 1 and the substrate 4 can be achieved by appropriately adjusting the bonding area between the receiving part 1 and the substrate 4. The cavity structure 11 provides sufficient space for the bonding glue between the receiving part 1 and the substrate 4. The bottom of the receiving part 1 or the bottom and part of the side are bonded to the substrate 4, and the overall structure is stable and the sealing is better.

[0033] At the same time, a space for packaging the optical chip 5 is reserved at the bottom of the lens 2. The space can be used to accommodate the optical chip 5 and for light propagation, which is beneficial to optical design. For example, the surface shape of the lower surface of the lens 2 can be designed to achieve a preset optical effect; the principle of refraction due to different refractive indices of different media can also be used to form a "double-layer lens" between the optical chip 5 and the external atmosphere, thereby performing optical design. The sensor device of the utility model has the advantages of good reliability, good light control effect and high accuracy.

[0034] The mold of the utility model is configured as an upper mold 31 and a lower mold 32 which are separated from each other. The lens 2 is formed by molding the upper mold 31 and the lower mold 32. The structure is simple and reasonable, and the molds can be easily molded and demolded. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of a local state after the step S0 of the manufacturing method of the lens module provided by the utility model is implemented;

[0036] Figure 2 It is a schematic diagram of a local state after the step S2 of the manufacturing method of the lens module provided by the utility model is implemented;

[0037] Figure 3 It is a schematic diagram of a local state after the step S3 of the manufacturing method of the lens module provided by the utility model is implemented;

[0038] Figure 4 This is a schematic diagram of the overall state after the step S3 of the manufacturing method of the lens module provided by the utility model is implemented;

[0039] Figure 5 It is a schematic diagram of a local state after the step S3 of the first embodiment of the manufacturing method of the lens module provided by the utility model is implemented;

[0040] Figure 6 It is a partial cross-sectional schematic diagram of the first embodiment of the lens module provided by the utility model;

[0041] Figure 7 It is a schematic diagram of a local state after the step S3 of the second embodiment of the method for manufacturing a lens module provided by the utility model is implemented;

[0042] Figure 8 It is a partial cross-sectional schematic diagram of the second embodiment of the lens module provided by the utility model;

[0043] Fig. 9 It is a schematic diagram of a local state after the step S3 of the third embodiment of the method for manufacturing a lens module provided by the utility model is implemented;

[0044] Fig.10 It is a partial cross-sectional schematic diagram of the third embodiment of the lens module provided by the utility model;

[0045] Fig.11 It is a schematic diagram of the cross-section structure of the sensor device provided by the utility model;

[0046] Fig.12 It is a three-dimensional structural schematic diagram of the mold provided by the utility model;

[0047] Fig.13 It is a three-dimensional structural schematic diagram of the upper mold provided by the utility model;

[0048] Fig.14 It is a three-dimensional structural schematic diagram of the lower mold provided by the utility model;

[0049] Fig.15 It is a light path diagram of the sensor device provided by the utility model;

[0050] Fig.16 It is a schematic diagram of the state after the step A1 of the manufacturing method of the sensor device in the prior art is implemented;

[0051] Fig.17 It is a schematic diagram of the state after the step A2 of the manufacturing method of the sensor device in the prior art is implemented;

[0052] Fig.18It is a schematic diagram of the state after the step A3 of the manufacturing method of the sensor device of the prior art 1 is implemented;

[0053] Fig.19 It is a schematic diagram of the implementation process of step A3 of the manufacturing method of the sensor device of the prior art II;

[0054] Fig. 20 It is a schematic diagram of the state after the step A3 of the manufacturing method of the sensor device of the prior art 2 is implemented;

[0055] Fig.21 is a top view of a sensor device of the prior art;

[0056] In the figure: 1-supporting part; 11-cavity structure; 12-first groove; 2-lens; 21-first lens; 22-second lens; 31-upper mold; 32-lower mold; 301-mold cavity; 302-limiting plate; 4-substrate; 5-optical chip; 6-second groove. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0058] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0059] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0060] Reference Figure 1-15 As shown, it is a preferred embodiment provided by the utility model.

[0061] A method for manufacturing a lens module comprises the following steps:

[0062] Step S1: at least two cavity structures 11 with upper and lower openings are provided in the receiving portion 1. The upper mold 31 and the lower mold 32 are respectively provided with a mold cavity 301 with one side opening. Figure 2, the figure only takes the formation of a light-transmitting lens 2 in a cavity structure 11 as an example, and the other cavity structure 11 is not shown in the figure, and the manufacturing method is the same. After the receiving part 1 is placed, the mold cavity 301 of the upper mold 31 and the lower mold 32 respectively extend into the cavity structure 11 from the upper and lower opening ends of the receiving part 1, and the openings of the mold cavity 301 of the upper mold 31 and the lower mold 32 are relatively aligned and molded. During the mold closing process, a gap is left between the upper mold 31 and the lower mold 32, and the excess light-transmitting glue used to fill the mold cavity 301 flows out along the gaps around and adheres to the inner wall of the receiving part 1. The material of the receiving part 1 can be a light-transmitting material or a light-absorbing material (such as black glue), etc.

[0063] Step S2, fill the mold cavity 301 with transparent glue, the shape of the mold cavity 301 is used to form the required optical interface. The excess transparent glue flows out through the gap around the upper mold 31 and the lower mold 32, and adheres and fixes to the inner wall of the receiving part 1, refer to Figure 2 .

[0064] Step S3: After curing, the upper mold 31 and the lower mold 32 are removed to form a transparent lens 2 for optical shaping in the cavity structure 11. Figure 3 ) and overall status diagram ( Figure 4 The lens 2 further includes a first lens 21 disposed in one cavity structure 11 for adjusting the output light, and a second lens 22 disposed in another cavity structure 11 for adjusting the received light. Below the first lens 21 and the second lens 22, there is a space in the cavity structure 11 for placing the optical chip 5.

[0065] The manufacturing method of the lens module of the utility model adopts the method of pre-forming the lens 2 in the cavity structure 11 of the receiving part 1, reserving space for packaging the optical chip 5 at the bottom of the lens 2, and bonding the bottom of the receiving part 1 or the bottom and part of the side of the receiving part 1 to the substrate 4, so that the connection between the receiving part 1 and the substrate 4 is firm. In order to increase the firmness of the bonding, the amount of adhesive used can also be appropriately increased. Compared with the prior art one and two, the utility model has more space for accommodating adhesive, that is, the adhesive can spread to part of the inner wall of the cavity structure 11 and part or all of the upper surface of the substrate 4, and it is not easy to contaminate the lens 2. In addition, there is no need to cut out the second groove 6, the production process is simple, the manufacturing accuracy and assembly accuracy requirements are low, the production efficiency is high, and the yield rate is high. The sensor device has good sealing and high precision.

[0066] There are two preferred methods for filling the mold with light-transmitting glue:

[0067] Method 1: Reference Figure 1 , step S0 is set before step S1, and light-transmitting glue is distributed on the surface of the mold cavity 301 of the upper mold 31 and / or the lower mold 32.

[0068] During the mold closing process, the light-transmitting glue is squeezed through the upper mold 31 and the lower mold 32, and the mold cavity 301 of the upper mold 31 and the lower mold 32 is filled. The excess light-transmitting glue flows out along the gaps around, and the flowing light-transmitting glue is connected to the inner wall of the receiving part 1 to play a fixing role.

[0069] Method 2: The combination of the upper mold 31 and the lower mold 32 is provided with an injection port, and the light-transmitting glue is injected through the injection port so that the light-transmitting glue fills the mold cavity 301 of the mold. Excess light-transmitting glue flows out from the injection port, and at the same time, the excess light-transmitting glue flows out along the gaps around it. The light-transmitting glue that flows out is connected to the inner wall of the receiving part 1 to play a fixing role.

[0070] The manufacturing method of the utility model fixes the lens 2 on the receiving part 1 while molding the lens 2, and the process is simple and efficient. When the molds are closed, the excess light-transmitting glue flows out along the gap between the upper mold 31 and the lower mold 32, and spreads upward and downward on the inner wall of the cavity structure 11. By controlling the amount of light-transmitting glue, the bonding area of ​​the edges of the lens 2 and the cavity structure 11 can be controlled, that is, the lens 2 can be connected to part or all of the inner wall of the cavity structure 11. Figure 7-8 Since the inner wall area of ​​the cavity structure 11 is large, the connection between the lens 2 and the receiving portion 1 is more secure than that of the prior art 1 and 2, and the stress effect is smaller.

[0071] Optimization scheme: In step S2, the inner wall of the cavity structure 11 corresponds to the gap between the upper mold 31 and the lower mold 32 and is provided with a first groove 12 for accommodating the light-transmitting glue. The first groove 12 can be set as a stepped groove, referring to Figure 2 It can also be set to a notch-shaped groove that is recessed into the interior of the receiving portion 1, refer to Figure 5 The specific structure is set as needed, not limited to the above structure, as long as the first groove 12 is used for accommodation and reinforcement, it is within the technical solution of the utility model. The light-transmitting glue fills the mold cavity 301 of the mold, and the excess light-transmitting glue flows out along the gaps around it and flows into the first groove 12 to bond with the inner wall of the receiving part 1, and the edges of the lens 2 extend into the first groove 12. At the same time, the lens 2 can be bonded to the inner wall of the cavity structure 11 above and / or below the first groove 12, so that the connection between the lens 2 and the receiving part 1 is more firmly.

[0072] A method for manufacturing a sensor device, including the method for manufacturing a lens module described in this specification, further comprising a step S4 after step S3. S4, aligning the cavity structure 11 of the receiving part 1 with at least two optical chips 5 disposed on the substrate 4 one by one; then bonding the receiving part 1 to the substrate 4, and encapsulating the optical chip 5 in the cavity structure 11 under the lens 2 and on the substrate 4, referring to Fig.11The optical chip 5 preferably includes a light emitting chip and a photosensitive chip. The manufacturing method of the sensor device of the utility model has simple process, high production efficiency, good product stability, good sealing, low manufacturing accuracy and assembly accuracy requirements, and high precision.

[0073] The mold used in the method for making the lens module in this manual is referred to Fig.12 The mold includes an upper mold 31 and a lower mold 32. Figure 13-14 The upper mold 31 and the lower mold 32 are respectively provided with a mold cavity 301 recessed into the upper mold 31 and the lower mold 32, and the mold cavity 301 is used for the light-transmitting glue to be molded between the upper mold 31 and the lower mold 32. The upper mold 31 and the lower mold 32 are provided with a limit plate 302 for mold closing and positioning on the side away from the mold cavity 301. The length of the limit plate 302 is greater than the length between the outer walls of the mold cavity 301 on both sides, that is, the length of the limit plate 302 is greater than the length of the opening of the cavity structure 11 of the receiving part 1, so that the limit plate 302 can be stuck at the two ends of the receiving part 1, which is used to control the length of the mold cavity 301 to penetrate into the cavity structure 11, and then accurately control the position of the mold closing.

[0074] The upper mold 31 and the lower mold 32 are set to be easy to demould. The outer diameter of the mold cavity 301 of the upper mold 31 deep into the cavity structure 11 is set to be consistent at the top and bottom (refer to Figure 2 , Figure 5 ), or the outer diameter of the mold cavity 301 end is set to gradually decrease in the direction away from the limiting plate 302 (refer to Fig. 9 ). The outer diameter of the cavity 301 of the lower mold 32 that penetrates into the cavity structure 11 is set the same as the upper mold 31. Correspondingly, the diameter of the portion of the cavity structure 11 that accommodates the upper mold 31 is uniform or the diameter of the portion of the cavity structure 11 that accommodates the upper mold 31 gradually decreases in the direction away from its opening; the diameter of the portion of the cavity structure 11 that accommodates the lower mold 32 is uniform or the diameter of the portion of the cavity structure 11 that accommodates the lower mold 32 gradually decreases in the direction away from its opening. The structure that is easy to demold is not limited to the above structure.

[0075] The mold of the utility model is set as an upper mold 31 and a lower mold 32 separated from each other, and the lens 2 is formed by the mold combination of the two. The structure is simple and reasonable, and it is easy to mold and demold. The length of the outer wall on both sides of the mold cavity 301 of the upper mold 31 and the lower mold 32 is matched with the structure of the first groove 12, so that the edges of the lens 2 after the mold combination are formed in the first groove 12, or formed in the first groove 12 and on the inner wall of the cavity structure 11 above and / or below the first groove 12, and the overall structure is more stable.

[0076] A lens module, referring to Figure 3, including a receiving portion 1 and a lens 2. The receiving portion 1 is provided with at least two cavity structures 11 with upper and lower openings. Figure 4 The lens 2 at least includes a first lens 21 and a second lens 22. The first lens 21 and the second lens 22 are respectively disposed in two cavity structures 11.

[0077] The lens 2 is an optical functional area, that is, the lens 2 is made of a light-transmitting material and is used to optically adjust the outgoing light or / and the received light. The surface shapes of the first lens 21 and the second lens 22 can be set according to optical needs.

[0078] The receiving portion 1 is a non-optical functional area, and can be made of a light-transmitting material or a non-light-transmitting material as required, and is used to fix the lens 2 and isolate the light of the first lens 21 and the second lens 22 to prevent light interference between the first lens 21 and the second lens 22. The material of the receiving portion 1 is preferably a material with a certain light-absorbing function, such as black glue.

[0079] In a preferred embodiment, in order to make the connection between the lens 2 and the receiving part 1 more stable, a first groove 12 is provided on the inner wall of the receiving part 1, and the edges of the lens 2 are fixed in the first groove 12, that is, the lens 2 is placed in the first groove 12 by gluing, is not easy to fall off, and has high stability.

[0080] Embodiment 1: A method for manufacturing a lens module comprises the following steps:

[0081] Step S1, reference Figure 5 At least two upper and lower openings of the cavity structure 11 are provided in the receiving part 1, and the cavity structure 11 is provided with a first notch-shaped groove 12 recessed into the receiving part 1, and the diameters of the cavity structure 11 on both sides of the first groove 12 are consistent. The upper mold 31 and the lower mold 32 are respectively provided with a mold cavity 301 with one side open, and the outer wall of the mold cavity 301 end of the upper mold 31 and the lower mold 32 are consistent in diameter.

[0082] The mold cavities 301 of the upper mold 31 and the lower mold 32 are respectively extended from the upper and lower opening ends of the receiving part 1 into the cavity structure 11 for alignment and mold closing. A gap is left between the upper mold 31 and the lower mold 32 during the mold closing process.

[0083] Step S2 , the light-transmitting glue fills the mold cavity 301 of the mold, and the excess light-transmitting glue flows out through the gaps around the upper mold 31 and the lower mold 32 , and flows into the first groove 12 to be bonded to the inner wall of the receiving part 1 .

[0084] Step S3: After curing, remove the upper mold 31 and the lower mold 32. A lens 2 is formed in the cavity structure 11. The lens 2 includes at least a first lens 21 and a second lens 22 formed in different cavity structures 11. The periphery of the lens 2 is connected to the first groove 12, as shown in FIG. Figure 6 .

[0085] Embodiment 2: The main difference from Embodiment 1 is as follows: Figure 7 : In step S1, the diameter of the cavity structure 11 above the first groove 12 is greater than the diameter of the cavity structure 11 below the first groove 12. Correspondingly, the diameter of the outer wall of the cavity 301 end of the upper mold 31 is greater than the diameter of the outer wall of the cavity 301 end of the lower mold 32.

[0086] In step S2 , the excess light-transmitting glue flows out through the gaps around the upper mold 31 and the lower mold 32 , and flows into the first groove 12 and the inner walls of the cavity structure 11 above and below the first groove 12 , and adheres to the inner wall of the receiving portion 1 .

[0087] In step S3, the periphery of the lens 2 is connected to the first groove 12 and the inner wall of the cavity structure 11 above and below the first groove 12, referring to Figure 8 .

[0088] The other settings are the same as those in the first embodiment.

[0089] Embodiment 3: The main difference from Embodiment 1 is as follows: Fig. 9 In step S1, the diameter of the cavity structure 11 above the first groove 12 gradually decreases in the direction away from the upper opening, and the diameter of the cavity structure 11 below the first groove 12 gradually decreases in the direction away from the lower opening. Correspondingly, the diameters of the outer walls of the cavity 301 ends of the upper mold 31 and the lower mold 32 are respectively set to gradually decrease in the direction away from the limiting plate 302.

[0090] Step S3 refers to Fig.10 .

[0091] The other settings are the same as those in the first embodiment.

[0092] A sensor device using the lens module of this specification also includes a substrate 4 and an optical chip 5, referring to Fig.11. The lens 2 is fixed above the substrate 4, and the optical chip 5 is packaged between the substrate 4 and the lens 2. The optical chip 5 includes a light-emitting chip that emits light and a photosensitive chip that receives light. The light-emitting chip is arranged in a cavity structure 11 on the substrate 4 and below the first lens 21. The photosensitive chip is arranged in another cavity structure 11 on the substrate 4 and below the second lens 22. The light emitted by the light-emitting chip reaches the second lens 22 and is received by the second lens 22 after refraction and / or reflection by the first lens 21, and reaches the photosensitive area of ​​the photosensitive chip after refraction and / or reflection by the second lens 22, and is received and processed by the photosensitive area. The sensor device of the utility model has a stable structure, good sealing and high precision. Reserving space for packaging the optical chip 5 at the bottom of the lens 2 is beneficial to optical design, and different surface designs can be performed on the lower surfaces of the first lens 21 and the second lens 22 to achieve different optical effects such as divergence and convergence.

[0093] Working principle reference of sensor device Fig.15 The light emitted by the light-emitting chip is optically shaped by the first lens 21 and then emitted at a preset angle, shape and brightness. The emitted light is reflected after irradiating the object to be detected or sensed. The reflected light is incident on the second lens 22 and is received by the photosensitive chip after optical shaping by the second lens 22. The photosensitive chip converts the received light energy into electrical energy and makes corresponding signal feedback. The lens 2 of the utility model can be set to different surface shapes and tilt angles according to different positions of the cavity structure 11. The lens 2 of the prior art is tightly wrapped on the optical chip 5, and the adjustable surface shape, angle and space of the lens 2 are limited. Therefore, the sensor device of the utility model is easy to design optically, has good optical adjustment effect, and has high detection accuracy.

[0094] This does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mold, characterized in that: The invention comprises an upper mold (31) and a lower mold (32), wherein the upper mold (31) and the lower mold (32) are respectively provided with a mold cavity (301) for molding the light-transmitting glue between the upper mold (31) and the lower mold (32); and the upper mold (31) and the lower mold (32) are provided with a limit plate (302) for mold positioning on a side away from the mold cavity (301).

2. A lens module, characterized in that: A lens module manufactured using the mold as claimed in claim 1, comprising: The receiving portion (1) is provided with at least two cavity structures (11) with upper and lower openings; A lens (2) comprising at least a first lens (21) and a second lens (22), wherein the first lens (21) and the second lens (22) are respectively arranged in the two cavity structures (11); the lens (2) is an optical functional area, and is used for optically adjusting the outgoing light and / or the received light.

3. The lens module according to claim 2, characterized in that: The receiving portion (1) is a non-optical functional area, used for supporting the lens (2) and isolating the light from the first lens (21) and the second lens (22).

4. The lens module according to claim 2 or 3, characterized in that: The inner wall of the receiving portion (1) is provided with a first groove (12) for connecting the peripheral edges of the lens (2).

5. A sensor device, characterized in that: The lens module according to any one of claims 2 to 4 further comprises: A substrate (4) disposed below the lens (2); An optical chip (5) comprises a light-emitting chip for emitting light and a photosensitive chip for receiving light; the light-emitting chip is arranged on the substrate (4) and below the first lens (21); the photosensitive chip is arranged on the substrate (4) and below the second lens (22).

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