Sensor soft rubber mold for infrared sensor

Abstract

The utility model discloses a sensor soft glue mould of infrared sensor belongs to soft glue mould technical field. It aims at solving the problem of the existing infrared sensor soft glue mould's instability and the problem of the too fast exhaust of the initial stage of glue injection leading to the overflow of colloid. The mould includes oil base silica gel mould main part, is equipped with infrared sensor main part groove in the main part, sets up silica gel bubble at one end, and there is airbag in the bubble, and the main part groove is equipped with suction cup cavity near silica gel bubble and is connected with airbag through trachea, and annular magnet is installed in the groove of suction cup cavity side lower side; the outlet of top exhaust hole is equipped with elastic diaphragm, and the one end of diaphragm is connected with the exhaust hole inner wall joint groove cooperation, and the remote end has the gap. The mould is used for the infrared sensor metal surface casting silica gel soft film layer, can realize the double fixing of negative pressure and magnetic attraction, strengthens the stability, can also automatically adjust the exhaust speed according to the air pressure, avoids the overflow of colloid.

Description

Technical Field

[0001] This utility model relates to the field of soft rubber mold technology, and in particular to a sensor soft rubber mold for an infrared sensor. Background Technology

[0002] An infrared sensor is a sensor that can sense infrared radiation emitted by a target and uses the physical properties of infrared light for measurement. Based on the detection mechanism, it can be divided into photon detectors and thermal detectors. Infrared sensing technology has been widely used in modern science and technology, national defense, and industry and agriculture. The final step in the manufacturing of an infrared sensor is generally to cast a layer of silicone soft film onto its metal surface. Existing soft film molds typically use double-layer hard molds and require internal support, resulting in a support hole that needs to be filled in later. Furthermore, existing soft film molds are prone to adhesive residue at the lens area, which needs to be removed after the soft film layer is manufactured.

[0003] In view of this, Chinese utility model patent CN214188087U discloses a soft rubber mold for an infrared sensor. It utilizes the low temperature during soft rubber layer casting and the good elasticity and shaping properties of an oil-based silicone mold body to shape the soft rubber layer. By pressing the silicone bubble, air is expelled from the air bladder, and the infrared sensor lens to be processed is aligned with the suction cup cavity. The silicone bubble is then released, and its elasticity is used to adhere and fix the infrared sensor lens to the suction cup cavity, separating the sensor lens from the gaps in the soft rubber molding process, thus preventing the lens from sticking to the adhesive. However, relying solely on the suction cup cavity to adhere and fix the infrared sensor lens can easily lead to air leakage and unstable fixation. Furthermore, the vent is directly connected to the outside, posing a risk of adhesive overflow if venting is too rapid during the initial injection stage.

[0004] Therefore, it is necessary to improve upon the shortcomings of the existing technologies mentioned above. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a soft rubber mold for infrared sensors, which addresses the shortcomings of the prior art and solves the problems of unstable fixing of soft rubber molds for infrared sensors and excessive venting in the early stage of glue injection, which leads to glue overflow.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a soft rubber mold for an infrared sensor, comprising an oil-based silicone mold body, wherein an infrared sensor body groove is provided inside the oil-based silicone mold body, a silicone bubble is provided at one end of the oil-based silicone mold body, an air bladder is provided inside the silicone bubble, a suction cup cavity is provided inside the oil-based silicone mold body near the silicone bubble in the infrared sensor body groove, an air tube is connected between the suction cup cavity and the air bladder, and an installation groove is provided inside the oil-based silicone mold body below the suction cup cavity, wherein a ring magnet is installed in the installation groove.

[0007] By adopting the above technical solution, an annular magnet is installed on the lower side of the suction cup cavity. The annular magnet attracts the metal parts of the infrared sensor lens, forming a double fixation with the negative pressure adsorption of the suction cup cavity, thereby enhancing the stability of the infrared sensor fixation.

[0008] A further provision of the above technical solution is that: a first insert slot communicating with the mounting groove is provided on one side of the oil-based silicone mold body, and the annular magnet can be inserted into the mounting groove through the first insert slot.

[0009] The above technical solution facilitates the installation and disassembly of the ring magnet, improving the practicality and maintenance convenience of the mold.

[0010] A further feature of the above technical solution is that a limiting boss is provided on one side of the mounting groove to engage with the inner ring of the annular magnet.

[0011] By adopting the above technical solution, the limiting boss engages with the inner ring of the annular magnet, which can limit the inner ring of the annular magnet. Combined with the limiting of the outer ring of the annular magnet by the mounting groove, the stability of the annular magnet installation is further enhanced.

[0012] A further provision of the above technical solution is as follows: the top of the oil-based silicone mold body is provided with an exhaust hole that communicates with the groove of the infrared sensor body, an elastic diaphragm is installed at the outlet of the exhaust hole, one end of the elastic diaphragm is provided with a snap-fit ​​part, and the inner wall of the exhaust hole is provided with a snap-fit ​​groove that cooperates with the snap-fit ​​part.

[0013] By adopting the above technical solution, an elastic diaphragm is set in the vent hole. When the internal air pressure increases during glue injection, the elastic diaphragm deforms and expands the venting channel, thereby automatically adjusting the venting speed according to the internal air pressure during glue injection, and avoiding glue overflow caused by excessively fast venting in the early stage of glue injection.

[0014] A further provision of the above technical solution is that the end of the elastic diaphragm away from the snap-fit ​​portion is provided with a notch to ensure the basic air displacement.

[0015] By adopting the above technical solution, the notch on the elastic diaphragm can ensure a certain amount of exhaust volume under normal conditions, ensuring the exhaust of air inside the mold. At the same time, in conjunction with the deformation of the elastic diaphragm when the air pressure increases, the exhaust speed can be reasonably adjusted.

[0016] A further provision of the above technical solution is that the inclined surface of the oil-based silicone mold body is provided with multiple sets of infrared sensor pin holes that cooperate with the groove of the infrared sensor body.

[0017] Using the above technical solution, the infrared sensor pins are fixed through the pin holes of the infrared sensor. Since the lens and pins need to be exposed and cannot be coated, the process characteristics of not needing a soft glue layer are used to support the whole. Thus, the entire infrared sensor body is made of soft glue in one injection, without fixing holes, avoiding the complicated operation of secondary hole filling.

[0018] A further provision of the above technical solution is that an infrared sensor side groove is provided inside the oil-based silicone mold body at the outer side of the infrared sensor body groove to cooperate with it.

[0019] Using the above technical solution, the soft rubber layer can be molded into an edge ring through the infrared sensor edge groove.

[0020] A further provision of the above technical solution is that the oil-based silicone mold body has injection holes on both sides that are connected to the side grooves of the infrared sensor.

[0021] By adopting the above technical solution, the injection hole is connected to the side groove of the infrared sensor, which facilitates the injection of the adhesive and ensures that the adhesive can be evenly filled into the mold.

[0022] A further provision of the above technical solution is that the top of the oil-based silicone mold body is provided with a second insert slot that communicates with the infrared sensor body slot, and the infrared sensor is inserted into the infrared sensor body slot through the second insert slot.

[0023] By adopting the above technical solution, the setting of the second insert slit facilitates the installation and removal of the infrared sensor and improves the convenience of mold reuse.

[0024] A further provision of the above technical solution is that a nano-level anti-stick coating is sprayed onto the inner wall of the infrared sensor body groove and pin hole.

[0025] By adopting the above technical solution, the nano-level anti-stick coating can prevent silicone from sticking to the inner wall of the mold, which facilitates the rapid separation of the soft rubber layer from the mold after molding, improves production efficiency, and at the same time reduces the amount of adhesive residue in the mold, which can extend the cleaning cycle of the mold.

[0026] The beneficial effects achieved by this utility model are as follows: by installing a ring magnet on the lower side of the suction cup cavity, magnetic attraction of the metal parts on the infrared sensor is realized. Combined with the negative pressure adsorption of the suction cup cavity, a double fixation is formed, which significantly enhances the stability of the infrared sensor fixation. An elastic diaphragm is set in the vent hole, which can automatically adjust the venting speed according to the change of air pressure inside the mold during glue injection, avoiding the problem of glue overflow caused by excessively fast venting in the early stage of glue injection. At the same time, the setting of the notch ensures the basic venting volume and ensures the reasonable discharge of air inside the mold. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0028] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0029] Figure 3 This is an internal cross-sectional view of the oil-based silicone mold body in an embodiment of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the elastic diaphragm in an embodiment of this utility model.

[0031] The markings in the diagram are: 1. Oil-based silicone mold body; 11. Infrared sensor body groove; 12. Silicone bubble; 13. Airbag; 14. Suction cup cavity; 15. Air pipe; 16. Mounting groove; 17. Ring magnet; 18. First plug slot; 19. Limiting boss; 20. Vent hole; 21. Elastic diaphragm; 22. Snap-fit ​​part; 23. Snap-fit ​​groove; 24. Notch; 25. Infrared sensor pin hole; 26. Infrared sensor side groove; 27. Injection gate; 28. Second plug slot. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figure 1-3As shown, a soft silicone mold for an infrared sensor includes an oil-based silicone mold body 1. An infrared sensor body groove 11 is provided inside the oil-based silicone mold body 1. A silicone bubble 12 is provided at one end of the oil-based silicone mold body 1, and an air bladder 13 is provided inside the silicone bubble 12. A suction cup cavity 14 is provided inside the oil-based silicone mold body 1 near the silicone bubble 12 within the infrared sensor body groove 11. An air tube 15 connects the suction cup cavity 14 and the air bladder 13. An installation groove 16 is provided below the suction cup cavity 14 inside the oil-based silicone mold body 1, and a ring magnet 17 is installed in the installation groove 16. A first insertion slot 18 communicating with the installation groove 16 is provided on one side of the oil-based silicone mold body 1, allowing the ring magnet 17 to be inserted into the installation groove 16 through the first insertion slot 18. A limiting boss 19 is provided on one side of the installation groove 16 to engage with the inner ring of the ring magnet 17.

[0034] like Figure 2-4 As shown, the top of the oil-based silicone mold body 1 is provided with an exhaust hole 20 that communicates with the infrared sensor body groove 11. An elastic diaphragm 21 is installed at the outlet of the exhaust hole 20. One end of the elastic diaphragm 21 is provided with a snap-fit ​​part 22. The inner wall of the exhaust hole 20 is provided with a snap-fit ​​groove 23 that cooperates with the snap-fit ​​part 22. The end of the elastic diaphragm 21 away from the snap-fit ​​part 22 is provided with a notch 24 to ensure the basic exhaust volume.

[0035] like Figure 1-3 As shown, the inclined surface of the oil-based silicone mold body 1 has multiple sets of infrared sensor pin holes 25 that mate with the infrared sensor body groove 11. Inside the oil-based silicone mold body 1, located outside the infrared sensor body groove 11, there is an infrared sensor side groove 26 that mates with it. The two sides of the oil-based silicone mold body 1 are provided with injection holes 27 that communicate with the infrared sensor side groove 26. The top of the oil-based silicone mold body 1 is provided with a second plug slot 28 that communicates with the infrared sensor body groove 11. The inner walls of the infrared sensor body groove 11 and the pin holes 25 are coated with a nano-level anti-stick coating (not shown in the figure).

[0036] Working Principle: During use, the infrared sensor is inserted into the infrared sensor body groove 11 through the second insertion slot 28, with the infrared sensor pins placed in the infrared sensor pin holes 25, and the lens of the infrared sensor aligned with the suction cup cavity 14. Next, the silicone bubble 12 is pressed to expel the air from the airbag 13. After releasing, the airbag 13 regains its elasticity, creating negative pressure in the suction cup cavity 14 through the air tube 15, attracting the infrared sensor lens. Simultaneously, the ring magnet 17 magnetically attracts the metal components of the infrared sensor lens, achieving double fixation. During glue injection, silicone is injected through the injection hole 27 into the infrared sensor side groove 26 and the infrared sensor body groove 11. As glue injection proceeds, the air pressure inside the mold increases, and the elastic diaphragm 21 deforms to expand the exhaust channel. The exhaust speed is automatically adjusted according to the air pressure, and the notch 24 ensures a basic exhaust volume. After glue injection, due to the nano-level anti-stick coating, the soft glue layer does not easily adhere to the inner wall of the mold, facilitating quick removal and improving production efficiency. Simultaneously, it reduces glue residue inside the mold, extending the mold cleaning cycle.

Claims

1. A soft rubber mold for an infrared sensor, comprising an oil-based silicone mold body (1), wherein an infrared sensor body groove (11) is provided inside the oil-based silicone mold body (1), a silicone bubble (12) is provided at one end of the oil-based silicone mold body (1), an air bladder (13) is provided inside the silicone bubble (12), a suction cup cavity (14) is provided inside the oil-based silicone mold body (1) near the silicone bubble (12) in the infrared sensor body groove (11), and an air tube (15) is connected between the suction cup cavity (14) and the air bladder (13), characterized in that: The oil-based silicone mold body (1) has an installation groove (16) located below the suction cup cavity (14) and a ring magnet (17) is installed in the installation groove (16).

2. The soft rubber mold for an infrared sensor according to claim 1, characterized in that: The oil-based silicone mold body (1) has a first insert slot (18) on one side that communicates with the mounting groove (16), and the annular magnet (17) can be inserted into the mounting groove (16) through the first insert slot (18).

3. The soft rubber mold for an infrared sensor according to claim 2, characterized in that: The mounting groove (16) is provided with a limiting boss (19) on one side, which engages with the inner ring of the annular magnet (17).

4. A soft rubber mold for an infrared sensor according to any one of claims 1-3, characterized in that: The top of the oil-based silicone mold body (1) is provided with an exhaust hole (20) that communicates with the groove (11) of the infrared sensor body. An elastic diaphragm (21) is installed at the outlet of the exhaust hole (20). One end of the elastic diaphragm (21) is provided with a snap-fit ​​part (22). The inner wall of the exhaust hole (20) is provided with a snap-fit ​​groove (23) that cooperates with the snap-fit ​​part (22).

5. The soft rubber mold for an infrared sensor according to claim 4, characterized in that: The elastic diaphragm (21) has a notch (24) at the end away from the snap-fit ​​portion (22) to ensure the basic air volume.

6. The sensor soft rubber mold for an infrared sensor according to claim 5, characterized in that: The oil-based silicone mold body (1) has multiple sets of infrared sensor pin holes (25) on its inclined surface that cooperate with the infrared sensor body groove (11).

7. The soft rubber mold for an infrared sensor according to claim 6, characterized in that: The oil-based silicone mold body (1) has an infrared sensor side groove (26) located outside the infrared sensor body groove (11) inside.

8. The soft rubber mold for an infrared sensor according to claim 7, characterized in that: The oil-based silicone mold body (1) has injection holes (27) on both sides that are connected to the infrared sensor side groove (26).

9. The soft rubber mold for an infrared sensor according to claim 8, characterized in that: The top of the oil-based silicone mold body (1) is provided with a second insert slot (28) that communicates with the infrared sensor body slot (11). The infrared sensor is inserted into the infrared sensor body slot (11) through the second insert slot (28).

10. The soft rubber mold for an infrared sensor according to claim 9, characterized in that: The inner walls of the infrared sensor main body groove (11) and pin hole (25) are coated with a nano-level anti-stick coating (29).

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