barometer

Abstract

The utility model discloses a barometer relates to barometer technical field, the barometer includes substrate, shell, sensor component and protection film, the shell is connected in the substrate, and the enclosure is formed to the cavity, the shell has the open mouth of intercommunication the cavity, the sensor component is connected in the substrate, and locates in the cavity, and the sensor component is used for detecting air pressure, the protection film is connected in the shell, and locates at the open mouth, and the gap is equipped between the protection film with the shell, and the gap is set up intercommunication the cavity, and the gap is used for the outside air pressure conduction to the sensor component, the utility model provides technical scheme to reduce the possibility of the foreign matter of outside into the shell inside, guarantees the detection accuracy of barometer.

Description

Technical Field

[0001] This utility model relates to the field of barometer technology, and in particular to a barometer. Background Technology

[0002] Waterproof barometers are widely used in outdoor sports, smart wearables, and weather monitoring, but they face significant challenges in waterproofing when operating in humid, submerged, or high-humidity environments. Currently, waterproof sealing is commonly achieved by injecting waterproof adhesive into the barometer housing. However, this method requires an injection port on the housing. During later use, foreign matter can easily enter the housing through this port and become mixed with the waterproof adhesive. Once mixed in, foreign matter alters the stress distribution within the adhesive, thus affecting the barometer's accuracy. Utility Model Content

[0003] The main purpose of this invention is to provide a barometer that reduces the possibility of foreign objects entering the casing, thereby ensuring the barometer's detection accuracy.

[0004] To achieve the above objectives, this utility model proposes a barometer, the barometer comprising:

[0005] substrate;

[0006] A housing, the housing being connected to the substrate and enclosing a cavity, the housing having an opening communicating with the cavity;

[0007] A sensor assembly, connected to the substrate and disposed within the cavity, is used to detect air pressure; and

[0008] A protective membrane is connected to the housing and disposed at the opening. A gap is provided between the protective membrane and the housing, and the gap communicates with the cavity. The gap is used to allow external air pressure to be conducted to the sensor assembly.

[0009] In one embodiment, one of the protective film and the housing is provided with a boss, which is connected to the other one, thereby forming the gap between the protective film and the housing.

[0010] In one embodiment, the protective film is provided with protrusions, and the protrusions include a plurality of protrusions. The plurality of protrusions are provided at intervals on the protective film and connected to the housing, and the gap is formed between two adjacent protrusions.

[0011] In one embodiment, the protective membrane is provided with a protrusion that surrounds the periphery of the opening, and the gap extends through the protrusion.

[0012] In one embodiment, the protective membrane is further provided with reinforcing ribs on the side facing the opening, the reinforcing ribs being used to support the protective membrane.

[0013] In one embodiment, the gap height ranges from 1 μm to 1 mm.

[0014] In one embodiment, the protective film has an adhesive backing on the side facing the opening, and at least a portion of the adhesive backing is disposed adjacent to the gap, the adhesive backing being used to adhere foreign objects.

[0015] In one embodiment, the protective film is provided with an adhesive layer, the adhesive layer comprising a plurality of layers, the adhesive layer being bonded to the housing, and the gap being formed between adjacent adhesive layers.

[0016] In one embodiment, the housing has an opening at one end away from the substrate, and a connecting platform protrudes from the opening in a direction away from the opening, with the protective film connected to the connecting platform.

[0017] In one embodiment, the barometer further includes a waterproof adhesive filled within the cavity, the waterproof adhesive encapsulating the sensor assembly.

[0018] The technical solution of this utility model involves mounting a housing on a substrate to form a cavity, connecting a sensor assembly to the substrate for electrical and mechanical connection, and placing the sensor assembly inside the cavity. The housing has an opening communicating with the cavity, and a protective film is provided on the opening. The protective film is connected to the housing, and there is a gap between the protective film and the housing, which communicates with the cavity. This gap allows external gas to be transmitted into the cavity, enabling the sensor assembly to accurately sense the external air pressure. Furthermore, the fact that the cavity communicates with the outside through a small gap greatly reduces the possibility of foreign objects entering the housing, thus improving the reliability of the barometer. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the barometer in one embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the barometer in another embodiment of the present invention;

[0022] Figure 3 A bottom view of the protective film in one embodiment of this utility model;

[0023] Figure 4 A front view of the protective film in one embodiment of this utility model;

[0024] Figure 5 A bottom view of the protective film in another embodiment of this utility model.

[0025] Explanation of icon numbers:

[0026] 100. Barometer; 1. Substrate; 2. Housing; 21. Cavity; 22. Opening; 23. Connecting platform; 3. Sensor assembly; 31. ASIC chip; 32. MEMS chip; 33. Connecting wire; 4. Protective film; 41. Boss; 42. Reinforcing rib; 43. Gap; 44. Adhesive backing; 5. Waterproof adhesive.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] 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 scope of protection of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Currently, waterproof sealing is commonly achieved by injecting waterproof adhesive into the barometer housing. However, this method requires an injection port on the housing. During later use, foreign objects can easily enter the housing through the injection port and become mixed with the waterproof adhesive. Once foreign objects are mixed into the waterproof adhesive, they will change the stress distribution inside the adhesive, thus affecting the barometer's detection accuracy.

[0032] Based on the above issues, please refer to the following: Figures 1 to 5 As shown, this utility model proposes a barometer 100, which includes a base plate 1, a housing 2, a sensor assembly 3, and a protective film 4. The housing 2 is connected to the base plate 1 and forms a cavity 21. The housing 2 has an opening 22 that communicates with the cavity 21. The sensor assembly 3 is connected to the base plate 1 and disposed in the cavity 21. The sensor assembly 3 is used to detect air pressure. The protective film 4 is connected to the housing 2 and disposed at the opening 22. A gap 43 is provided between the protective film 4 and the housing 2. The gap 43 communicates with the cavity 21 and is used to allow external air pressure to be transmitted to the sensor assembly 3.

[0033] In this embodiment, the base plate 1 serves as the basic support structure for the barometer 100, providing a platform for mounting and connecting the housing 2 and the sensor assembly 3. The housing 2 is connected to the base plate 1 and forms a cavity 21 with the base plate 1. The sensor assembly 3 is disposed within the cavity 21. Thus, the housing 2 protects the sensor assembly 3, preventing it from being directly exposed to the outside and thus susceptible to damage. The sensor assembly 3 is mechanically and electrically connected to the base plate 1. The base plate 1 allows the barometer 100 to transmit the pressure signal detected by the sensor assembly 3 to the outside, facilitating its installation in different products and promoting modular installation. The opening 22 of the housing 2 allows for the injection of waterproof adhesive 5. A protective membrane 4 is positioned at the opening 22 to cover it, preventing excessive exposure of the opening 22 and thus avoiding the entry of impurities or foreign objects into the cavity 21. This protects the sensor assembly 3. Simultaneously, the protective membrane 4 does not completely seal the opening 22; a gap 43 remains between the protective membrane 4 and the housing 2, allowing external air pressure to be transmitted to the sensor assembly 3. The sensor assembly 3 can then accurately detect the external air pressure. The barometer 100 in this application, while ensuring the sensor assembly 3 can detect external air pressure, effectively prevents external impurities or foreign objects from entering the cavity 21 and interfering with the sensor assembly 3, thereby improving the detection accuracy and reliability of the barometer 100.

[0034] Understandably, the barometer 100 in this application can be a waterproof barometer 100, with the waterproof adhesive 5 injected into the cavity 21 through the opening 22; or it can be a regular barometer 100 with a casing, where the sensor assembly 3 detects external air pressure through the opening 22, or provides a maintenance access through the opening 22. The protective membrane 4 is made of a completely sealed, airtight material, which can be plastic or metal.

[0035] Optionally, the housing 2 can be connected to the substrate 1 by means of bonding, welding or snap-fitting.

[0036] Specifically, sensor component 3 includes an ASIC chip 31 and a MEMS chip 32. The ASIC chip 31 is connected to the substrate 1, and the MEMS chip 32 is connected to the ASIC chip 31 via a connecting line 33. The MEMS chip 32 can undergo slight deformation under external air pressure, converting the air pressure signal into an electrical signal. The ASIC chip 31 can amplify, filter, and perform analog-to-digital conversion on the raw signal from the MEMS chip 32 to extract useful information and improve signal quality and accuracy. Together, they achieve high-precision air pressure detection.

[0037] In embodiments of this utility model, such as Figure 1 and Figure 2 As shown, one of the protective film 4 and the housing 2 is provided with a boss 41, and the boss 41 is connected to the other one, so that a gap 43 is formed between the protective film 4 and the housing 2.

[0038] In this embodiment, the boss 41 can be disposed on the protective film 4 or on the housing 2. The boss 41 provides a certain distance between the protective film 4 and the housing 2 to facilitate the formation of a gap 43 for air pressure transmission.

[0039] In actual implementation, the boss 41 can be connected to the other of the protective membrane 4 and the housing 2 by means of bonding, welding or snap-fitting. The boss 41 can be provided in an open ring or strip shape.

[0040] Optionally, such as Figures 3 to 5 As shown, the protective film 4 is provided with protrusions 41, and there are multiple protrusions 41. Multiple protrusions 41 are provided at intervals on the protective film 4 and connected to the housing 2. A gap 43 is formed between two adjacent protrusions 41.

[0041] In this embodiment, when the protective film 4 is rectangular, the protrusions 41 may include two, each corresponding to one of the two opposite sides of the protective film 4 and connected to the housing 2. The other two sides of the protective film 4 are naturally not in contact with the housing 2 and are suspended, thus forming a gap 43 between the protective film 4 and the housing 2. In this embodiment, the protrusions 41 are strip-shaped, and the extending direction of the gap 43 forms an angle with the extending direction of the protrusions 41.

[0042] Optionally, the boss 41 can be intermittently arranged in a ring shape along the edge of the protective membrane 4, forming a gap 43 between the suspended portion of the protective membrane 4 and the housing 2. In the above case, the height of the gap 43 is the height of the boss 41. By setting the height of the boss 41, the height of the gap 43 between the protective membrane 4 and the housing 2 can be precisely controlled, so as to set the height of the gap 43 according to the requirements, ensuring that the height of the gap 43 is the preset height, which can not only ensure the smooth transmission of air pressure, but also reduce the possibility of impurities or foreign objects entering the cavity 21.

[0043] It is understandable that when the protective film 4 is provided with a protrusion 41, the protrusion 41 can be a part of the protective film 4, the protrusion 41 is the part of the protective film 4 with a thicker thickness, and the part of the protective film 4 that forms a gap 43 between the protective film 4 and the shell 2 can be the part of the protective film 4 with a thinner thickness.

[0044] In an embodiment of this utility model, the protective film 4 is provided with a boss 41, which surrounds the periphery of the opening 22, and the gap 43 passes through the boss 41.

[0045] In this embodiment, the gap 43 can be formed by a hole provided on the boss 41. The boss 41 is arranged in a complete ring around the periphery of the opening 22, and a through groove or through hole can be provided on the boss 41, forming a gap 43 that communicates with the cavity 21.

[0046] Similarly, in the embodiment where the boss 41 is provided on the housing 2, the boss 41 may also be strip-shaped or intermittently and annularly arranged along the periphery of the opening 22. The specific arrangement can refer to the arrangement of the boss 41 on the protective film 4, and is not specifically limited here.

[0047] In embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the protective membrane 4 is also provided with a reinforcing rib 42 on the side facing the opening 22, and the reinforcing rib 42 is used to support the protective membrane 4.

[0048] In this embodiment, the protective membrane 4 is used to provide additional mechanical support for the protective membrane 4, ensuring that the protective membrane 4 remains stable during use, preventing the protective membrane 4 from deforming due to external pressure or mechanical vibration, causing the protective membrane 4 to collapse and the gap 43 to become smaller or disappear, so that the external air pressure cannot be transmitted to the cavity 21, and the sensor assembly 3 cannot detect the external air pressure normally.

[0049] Understandably, when the protective membrane 4 is provided with a boss 41, the reinforcing rib 42 can be connected to the boss 41 to cooperate with the boss 41 and share the force on the protective membrane 4. Optionally, the reinforcing rib 42 can also be part of the protective membrane 4, with a thickness greater than the part that forms the gap 43 between the protective membrane 4 and the shell 2, in order to strengthen the rigidity of the protective membrane 4 and reduce the possibility of deformation of the protective membrane 4, so that the gap 43 can always maintain the preset state, ensuring the smooth transmission of air pressure while preventing impurities or foreign objects from entering the cavity 21.

[0050] Optionally, the reinforcing ribs 42 include multiple ribs arranged in a grid pattern. The grid-like reinforcing ribs 42 can evenly distribute the stress on the protective membrane 4, further improving the overall stability of the protective membrane 4;

[0051] In some embodiments, when the protective film 4 is rectangular and the protrusions 41 are arranged corresponding to two opposite sides of the protective film 4, the plurality of reinforcing ribs 42 can be divided into two groups. One group of reinforcing ribs 42 is parallel to and spaced apart from the protrusions 41. The other group of reinforcing ribs 42 is perpendicular to and spaced apart from the protrusions 41.

[0052] Optionally, the reinforcing ribs 42 can be arranged in various shapes, such as a grid, a ring, or a strip. In this embodiment, the arrangement of the reinforcing ribs 42 can be determined according to the shape of the protective membrane 4 and its connection position with the shell 2.

[0053] In this embodiment of the invention, the height of the gap 43 ranges from 1 μm to 1 mm. It is understood that if the gap 43 is too small, the efficiency of air pressure transmission to the cavity 21 will be low, and the speed at which air pressure changes are transmitted to the sensor assembly 3 will be slow, thus affecting the response speed of the barometer 100 in detecting air pressure. Furthermore, the slowed airflow caused by a small gap 43 may also make the barometer 100 more sensitive to temperature changes, and the gas inside the cavity 21 will be more susceptible to thermal expansion and contraction. If the gap 43 is too large, impurities or foreign objects can easily enter the cavity 21, affecting the normal operation of the sensor assembly 3 and reducing the protective performance of the barometer 100. By controlling the height of the gap 43 to between 1 μm and 1 mm, the barometer 100 of this embodiment can effectively prevent foreign objects from entering the cavity 21 while ensuring efficient air pressure transmission, thus ensuring the normal operation of the sensor assembly 3 and measurement accuracy.

[0054] Optionally, the height of the gap 43 can be 1μm, 10μm, 20μm, 50μm, 60μm, 70μm, 0.1mm, 0.5mm, 1mm, etc.

[0055] In embodiments of this utility model, such as Figure 3 As shown, the protective film 4 has an adhesive backing 44 on the side facing the opening 22, and at least part of the adhesive backing 44 is provided adjacent to the gap 43. The adhesive backing 44 is used to adhere foreign objects.

[0056] In this embodiment, the protective film 4 is coated or adhered with adhesive 44 on the side facing the opening 22, and the adhesive 44 is disposed adjacent to the gap 43. It is understood that when the barometer 100 is operating, impurities or foreign objects in the outside air may enter the cavity 21 through the gap 43 with the airflow. At this time, the adhesive 44 can effectively adsorb and fix the foreign objects, preventing them from further intruding into the cavity 21 through the gap 43, thereby avoiding the impact of impurities or foreign objects on the normal operation of the sensor assembly 3 in the cavity 21, and ensuring the measurement accuracy and long-term stability of the barometer 100.

[0057] In actual implementation, the adhesive 44 can be distributed in a ring or strip shape on the edge of the protective film 4, and the gap 43 is located between the adhesive 44 and the shell 2. In some embodiments, the adhesive 44 can fully cover the side of the protective film 4 facing the opening 22. The adhesive 44 material has strong adhesion and can firmly adhere to impurities or foreign objects. Even if affected by external vibration, the impurities or foreign objects adhering to the adhesive 44 will not fall off.

[0058] In an embodiment of this utility model, the protective film 4 is provided with an adhesive layer, which includes multiple adhesive layers. The adhesive layers are bonded to the shell 2, and gaps 43 are formed between adjacent adhesive layers.

[0059] In this embodiment, the protective film 4 is directly bonded to the shell 2 through the adhesive layer. Since the adhesive layer has a certain thickness, the part of the protective film 4 without the adhesive layer is suspended and forms a gap 43 with the shell 2.

[0060] In practical implementation, the adhesive layer can be distributed in a ring, strip, or dot pattern on the edge of the protective film 4. The adhesive layer serves to bond and fix the protective film 4 to the housing 2, ensuring the stability of the protective film 4 during the use of the barometer 100 and preventing displacement due to external pressure changes or mechanical vibration. Simultaneously, the gap 43 between adjacent adhesive layers forms a pressure transmission channel, allowing external air pressure to be transmitted to the cavity 21 for detection by the sensor assembly 3. In this embodiment, the adhesive layer can replace the boss 41, and the arrangement of the adhesive layer can refer to the arrangement of the boss 41 described above.

[0061] In embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the end of the housing 2 away from the substrate 1 is provided with an opening 22, and the housing 2 is provided with a connecting platform 23 protruding around the opening 22 in a direction away from the opening 22. The protective film 4 is connected to the connecting platform 23.

[0062] In this embodiment, the housing 2 protrudes around the opening 22 in a direction away from the opening 22 to form a connecting platform 23; in order to increase the connection area of ​​the protective film 4, so that the protective film 4 can be more stably fixed on the housing 2.

[0063] In some embodiments, the connecting platform 23 is formed by the housing 2 protruding around the opening 22 in the direction toward the opening 22.

[0064] It is understandable that in some embodiments, such as Figure 5 As shown, when the area of ​​the connecting platform 23 is large enough, the protective membrane 4 can simultaneously provide multiple protrusions 41 along the circumference and radial direction of the opening 22. The protrusions 41 are connected to the connecting platform 23, and the gaps 43 formed between the protrusions 41 are arranged in a bent or labyrinthine shape to prevent the airflow from carrying impurities or foreign objects into the cavity 21 in a straight line from the gaps 43. This can further reduce the possibility of impurities or foreign objects entering the cavity 21 from the gaps 43.

[0065] Optionally, the bosses 41 are arranged in an intermittent ring along the periphery of the opening 22 to form gaps 43 in the circumferential direction of the opening 22. In addition, multiple bosses 41 are also arranged at intervals in the radial direction of the opening 22 to form gaps 43 in the radial direction of the opening 22. The tail end of one boss 41 and the head end of another adjacent boss 41 at least partially overlap in the radial direction of the opening 22.

[0066] In embodiments of this utility model, such as Figure 1As shown, the barometer 100 also includes a waterproof adhesive 5 filled in the cavity 21, which covers the sensor assembly 3.

[0067] In this embodiment, the waterproof adhesive 5 is used to wrap the sensor assembly 3. This prevents moisture from directly contacting the sensor assembly 3 and affecting its performance and lifespan. It is understood that the waterproof adhesive 5 can conduct pressure, and the sensor assembly 3, wrapped in the waterproof adhesive 5, can still accurately sense changes in external air pressure through the adhesive.

[0068] In actual implementation, the waterproof adhesive 5 is injected into the cavity 21 through the opening 22, and the shell 2 also has the effect of preventing the waterproof adhesive 5 from overflowing.

[0069] Optionally, the waterproof adhesive 5 can be a gel adhesive. Gel adhesive has good elasticity and waterproof properties, forming a protective layer around the sensor assembly 3. After curing, the gel adhesive maintains a certain degree of flexibility, effectively buffering external impacts and vibrations while ensuring uniform pressure transmission, thus guaranteeing the pressure detection accuracy of the sensor assembly 3. The housing 2 is bonded to the substrate 1 with a polymer adhesive. The polymer adhesive can achieve good contact and melting with the waterproof adhesive 5, reducing the possibility of air bubbles remaining within the waterproof adhesive 5, further improving the sealing effect of the sensor assembly 3 and ensuring waterproof performance.

[0070] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A barometer, characterized in that, The barometer includes: substrate; A housing, the housing being connected to the substrate and enclosing a cavity, the housing having an opening communicating with the cavity; A sensor assembly, connected to the substrate and disposed within the cavity, is used to detect air pressure; and A protective membrane is connected to the housing and disposed at the opening. A gap is provided between the protective membrane and the housing, and the gap communicates with the cavity. The gap is used to allow external air pressure to be conducted to the sensor assembly.

2. The barometer as described in claim 1, characterized in that, One of the protective film and the housing is provided with a boss, and the boss is connected to the other one, so that the gap is formed between the protective film and the housing.

3. The barometer as described in claim 2, characterized in that, The protective film is provided with protrusions, and the protrusions include multiple protrusions. The multiple protrusions are provided at intervals on the protective film and connected to the housing. The gap is formed between two adjacent protrusions.

4. The barometer as described in claim 2, characterized in that, The protective membrane is provided with a protrusion, which is arranged around the periphery of the opening, and the gap is provided through the protrusion.

5. The barometer as described in claim 1, characterized in that, The protective membrane is further provided with reinforcing ribs on the side facing the opening, and the reinforcing ribs are used to support the protective membrane.

6. The barometer as described in claim 1, characterized in that, The gap height ranges from 1 μm to 1 mm.

7. The barometer as described in claim 1, characterized in that, The protective film has an adhesive backing on the side facing the opening, and at least a portion of the adhesive backing is disposed adjacent to the gap. The adhesive backing is used to adhere foreign objects.

8. The barometer as described in claim 1, characterized in that, The protective film has an adhesive layer, which includes multiple adhesive layers. The adhesive layers are bonded to the shell, and gaps are formed between adjacent adhesive layers.

9. The barometer as described in any one of claims 1 to 8, characterized in that, The housing has an opening at one end away from the substrate, and a connecting platform protrudes from the opening around the opening in a direction away from the opening. The protective film is connected to the connecting platform.

10. The barometer as described in any one of claims 1 to 8, characterized in that, The barometer also includes a waterproof adhesive filled in the cavity, which encapsulates the sensor assembly.

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