Metal packaging sensor with reinforced forming base

Abstract

The invention discloses a metal packaging sensor with a reinforced molding base. The sensor comprises a top cover, a diaphragm and a base, the top surface of the base is provided with a trumpet-shaped base opening formed by inward sinking, one side surface, facing the diaphragm, of the top cover is provided with a trumpet-shaped top cover opening formed by inward sinking, the top of the top cover is provided with a top cover through hole communicated with the top cover opening, and the bottom opening of the top cover opening is connected with the side wall of the crimping ring; the side wall of the top cover opening inclines from the crimping ring to the top cover through hole; the base, the diaphragm and the top cover are all made of metal materials; a base through hole communicated with the base mounting part and the bottom of the base opening is formed in the base, and the base is formed by strengthening and is formed with the top cover by laser welding; a gap is formed between the diaphragm and the upper end surface of the base; the gap is communicated with the base through hole to form an oil groove, and oil is injected into the oil groove. The design of the metal packaging sensor shows remarkable technical advantages in the aspects of structural stability, functionality and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a metal packaged sensor with a reinforced molded base. Background Art

[0002] In order to conduct minute deformation, high-precision sensors are provided with an oil chamber between the diaphragm and the sensing device. The deformation of the diaphragm is conducted to the sensing device through the oil chamber, so that the sensing device senses the deformation and generates a sensing signal. Since the base of the sensor is provided with too many connectors in combination according to the needs of the sensing connection, the sensing chip and the connecting leads on the circuit board are often subjected to vibration, which affects the stability of the device structure during the use of the sensor and reduces the overall service life of the sensor. For example, the sensing chip is loosened, resulting in poor contact between the sensing chip and the circuit board, causing the sensor to fail and unable to work, affecting the reliability of the sensor during use. Therefore, the sensor in the prior art has the problem of poor stability of the internal structure of the sensor. Summary of the invention

[0003] The embodiment of the present invention provides a metal package sensor with a reinforced molded base, aiming to solve the problem of poor stability of the internal structure of the sensor existing in the prior art method.

[0004] The embodiment of the present invention discloses a metal package sensor with a reinforced molded base, the sensor comprising a top cover, a diaphragm and a base; the top surface of the base is provided with a trumpet-shaped base opening formed by an inward depression, the edge of the base opening protrudes toward one side of the top cover to form a support ring, the outer edge of the top cover is provided with a crimping ring, the support ring and the crimping ring are respectively crimped to the two sides of the diaphragm; the top cover is provided with a trumpet-shaped top cover opening formed by an inward depression on one side facing the diaphragm, and the top of the top cover is provided with a A top cover through hole, the bottom opening of the top cover opening is connected to the side wall of the crimping ring; the side wall of the top cover opening is inclined by the crimping ring toward the top cover through hole; the base, the diaphragm and the top cover are all made of metal; a base through hole is provided in the base, which is connected to the base mounting portion and the bottom of the base opening, and the base is reinforced and laser welded with the top cover; a gap is provided between the diaphragm and the upper end surface of the base; the gap is connected to the base through hole to form an oil groove, and oil is injected into the oil groove.

[0005] Furthermore, a base flange is provided on the outer side wall of the base.

[0006] Furthermore, one side of the base flange is cut vertically to form a smooth cutting edge to avoid air gaps.

[0007] Furthermore, the sensor includes a sensing pin, the sensing pin is internally arranged in the base, and the sensing pin extends out of the base and externally receives the control device.

[0008] Furthermore, the base and the top cover are made of the same metal material.

[0009] Furthermore, the metal material is a first metal material, and the first metal material is stainless steel.

[0010] Furthermore, the ratio between the diameter of the top cover through hole and the inner diameter of the crimping ring is 1:3-12.

[0011] Furthermore, the outer surface of the sensor pin is made of kovar metal, and the outermost surface of the sensor pin is coated with metal-plated material.

[0012] Furthermore, the laser welding forming process temperature is 1200°C-1500°C.

[0013] Furthermore, the oil tank is configured to have a circular horizontal cross section.

[0014] The design of the above-mentioned metal packaged sensor demonstrates significant technical advantages in structural stability, sensing efficiency, manufacturing process, functionality and reliability, making it a high-performance sensor suitable for a variety of industrial and scientific research fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0016] Figure 1 A front perspective view of the overall structure of a metal package sensor with a reinforced molded base provided by an embodiment of the present invention;

[0017] Figure 2 The overall structure diagram of the metal package sensor with a reinforced molded base provided by an embodiment of the present invention;

[0018] Figure 3 An exploded schematic diagram of the overall structure of a metal package sensor with a reinforced molded base provided by an embodiment of the present invention;

[0019] Figure 4 Another overall structural diagram of a metal packaged sensor with a reinforced molded base provided by an embodiment of the present invention.

[0020] Figure Number:

[0021] 1. Top cover; 2. Diaphragm; 3. Base; 31. Base opening; 311. Support ring; 11. Crimp ring; 12. Top cover opening; 13. Top cover through hole; 33. Base through hole; 34. Base flange; 341. Avoid air and smooth cutting edges. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0024] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0025] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all combinations of one or more of the associated listed items.

[0026] like Figures 1 to 4As shown, a metal package sensor with a reinforced molded base provided in this embodiment includes a top cover 1, a diaphragm 2 and a base 3; the top surface of the base 3 is provided with a trumpet-shaped base opening 31 formed by an inward depression, and the edge of the base opening 31 is convex toward one side of the top cover 1 to form a support ring 311, and the outer edge of the top cover 1 is provided with a crimping ring 11, and the support ring 311 and the crimping ring 11 are respectively crimped on both sides of the diaphragm 2; the top cover 1 is provided with a trumpet-shaped top cover opening 12 formed by an inward depression on one side facing the diaphragm 2, and the top of the top cover 1 is provided with a top cover opening 12 formed by a inward depression. 12 is connected with a top cover through hole 13, and the bottom opening of the top cover opening 12 is connected with the side wall of the crimping ring 11; the side wall of the top cover opening 12 is inclined toward the top cover through hole 13 by the crimping ring 11; the base 3, the diaphragm 2 and the top cover 1 are all made of metal materials; a base through hole 33 is provided in the base 3, which is connected with the base 3 mounting part and the bottom of the base opening 31, and the base 3 is reinforced and laser welded with the top cover 1; there is a gap between the upper end surfaces of the diaphragm 2 and the base 3; the gap is connected with the base through hole 33 to form an oil groove, and oil is injected into the oil groove.

[0027] In actual use scenarios, the top cover 1 is a component of the sensor, located at the top of the sensor, and is used to close and protect the internal structure. The diaphragm 2 is located between the top cover 1 and the base 3, and is a key component in the sensor for sensing pressure or other physical quantities. The base 3 is the bottom structure of the sensor, providing support and fixing the sensor. The top surface of the base 3 is designed with a trumpet-shaped opening that is recessed inward, and this design helps to concentrate or guide the sensing area of ​​the sensor. The edge of the base opening 31 protrudes toward one side of the top cover 1 to form a support ring 311 for supporting the diaphragm 2 and maintaining its position. The outer edge of the top cover 1 is provided with a crimping ring 11, which cooperates with the support ring 311 of the base 3 to crimp the diaphragm 2 together. The top cover 1 is provided with a trumpet-shaped opening formed by recessing inward on one side of the diaphragm 2. This structure corresponds to the trumpet-shaped opening of the base 3 and is used to form a specific sensing channel. A through hole connected to the top cover opening 12 is provided on the top of the top cover 1, which is used to introduce or export the sensing medium (such as liquid or gas). The base 3, diaphragm 2 and top cover 1 are all made of metal, which helps to improve the mechanical strength and corrosion resistance of the sensor. The base 3 is reinforced and molded to enhance its structural strength and stability. The base 3 and the top cover 1 are formed by laser welding to ensure that the joint is well sealed and the structure is stable. A gap is left between the upper end surface of the diaphragm 2 and the base 3, and the gap is connected to the base through hole 33 to form an oil groove. Oil is injected into the oil groove for lubrication, cooling or sealing. By designing the mounting structure in the base 3 of the sensor as an integrated unit, the number of components is reduced, the structure is simplified, and the complexity of assembly is reduced. Enhanced stability and service life: The use of integrated structure and metal materials, coupled with enhanced molding and laser welding technology, together improve the overall stability and service life of the sensor.

[0028] In summary, by designing the main components of the sensor (top cover 1, diaphragm 2, base 3) as a whole, the joint points between the components are reduced, thereby reducing the structural weaknesses caused by poor joints, and significantly improving the rigidity and deformation resistance of the overall structure. The design of the support ring 311 and the crimping ring 11 ensures that the diaphragm 2 is firmly fixed inside the sensor, and even under extreme working conditions, it can maintain its position stability and avoid displacement caused by vibration or impact, thereby ensuring the measurement accuracy of the sensor. The trumpet-shaped openings of the top cover 1 and the base 3 help to concentrate the sensing medium, optimize the sensing efficiency of the sensor, and improve the sensitivity to small changes. The inclined side wall design of the top cover opening 12 allows the sensing medium to pass through the sensing area smoothly, reducing the generation of turbulence and dead zones, and improving the accuracy and repeatability of the sensing data. Made of metal material, it not only improves the mechanical strength of the sensor, but also enhances its corrosion resistance and temperature resistance, and is suitable for a variety of harsh environments. The reinforced molding technology of the base 3 enhances its mechanical strength, enabling it to withstand higher working pressures and temperatures, while ensuring the dimensional stability of the sensor in long-term use. Laser welding provides high-precision welding joints, ensures the overall sealing of the sensor, prevents the intrusion of external impurities and moisture, and extends the service life of the sensor. The setting of the oil tank not only provides lubrication for the diaphragm 2 and reduces wear, but also plays a role in isolating the external environment and protecting the internal sensitive components from contamination. The oil medium in the oil tank helps to maintain the stability of the internal environment of the sensor, reduces the impact of temperature changes and humidity on the performance of the sensor, and ensures the stability of the sensor in long-term use. The integrated structure and oil tank design make the maintenance of the sensor simpler, reduce the maintenance frequency and cost, and improve the user experience. In summary, the design of this metal packaged sensor shows significant technical advantages in structural stability, sensing efficiency, manufacturing process, functionality and reliability, making it a high-performance sensor suitable for a variety of industrial and scientific research fields.

[0029] Furthermore, a base flange 34 is provided on the outer side wall of the base 3 ; one side of the base flange 34 is vertically cut to form a smooth cutting edge 341 to avoid air.

[0030] Furthermore, the sensor includes a sensing pin, which is internally arranged in the base 3, and the sensing pin extends out of the base 3 and is externally connected to the control device. The base 3 and the top cover 1 are made of the same metal material.

[0031] Specifically, a base flange 34 is provided on the outer wall of the base 3, and the design of this flange can be used to enhance the fixing ability of the sensor so that it can be installed more firmly on the device or structure. The flange can also serve as an interface for docking with other components to provide a mechanical connection point. One side of the base flange 34 is cut vertically to form a smooth cut edge 341 to avoid air. This design is used to avoid interference with other components during installation or operation, and the smooth cut edge helps to reduce stress concentration and avoid fatigue damage caused by rough cutting edges. The sensor pin is built into the base 3. This design ensures that the electrical connection of the sensor is both hidden and safe, and avoids damage to the sensor pin by external factors. The sensor pin extends from the base 3 to connect with an external control device. This design simplifies the installation process of the sensor and provides a reliable electrical interface. The external connection design of the sensor pin allows the sensor to seamlessly dock with various control devices, whether it is an analog signal or a digital signal, to achieve efficient data transmission. The base 3 is made of a first metal material, which usually has good mechanical properties and processing properties and can withstand certain mechanical loads and environmental factors. Material selection of top cover 1: The top cover 1 can adopt the same first metal material as the base 3 to ensure overall consistency and welding performance. The selection of different metal materials provides flexibility for the welding process, and the welding parameters can be adjusted according to different material characteristics to ensure the strength and sealing of the welded joint. In summary, the further design details of this metal package sensor not only enhance its structural stability and functionality, but also improve its adaptability and reliability in practical applications through material selection and pin design.

[0032] Furthermore, the metal material is a first metal material, the first metal material is stainless steel, and may further include nickel plating, gold plating, and silver plating on the surface of stainless steel or carbon steel; and the diaphragm is stainless steel or aluminum.

[0033] Furthermore, the ratio between the diameter of the top cover through hole 13 and the inner diameter of the crimping ring 11 is 1:3-12.

[0034] Furthermore, the outer surface of the sensor pin is made of kovar metal, and the outermost surface of the sensor pin is coated with metal-plated material.

[0035] Specifically, the base 3 is made of stainless steel. Aluminum and its alloys are very popular in sensor manufacturing because of their light weight, good thermal and electrical conductivity, and easy molding. In addition, the corrosion resistance of aluminum is also an important factor in choosing it as the material of the base 3 of the sensor. The top cover 1 is made of iron-plated nickel material. Iron-plated nickel combines the strength of iron and the corrosion resistance of nickel, so that the top cover 1 can maintain good appearance and performance in a variety of environments while maintaining structural strength. The nickel plating can also improve the welding quality and prevent oxidation. The ratio between the diameter of the top cover through hole 13 and the inner diameter of the crimping ring 11 is 1:3 to 1:12. This ratio range ensures that the crimping ring 11 is large enough to fix the diaphragm 2, and the size of the top cover through hole 13 is moderate, which does not affect the stability of the structure and facilitates the installation and replacement of the internal components of the sensor. The outer surface of the sensor pin is made of kovar metal. The nickel plating treatment improves the corrosion resistance and wear resistance of the pin, and also provides a good electrical contact surface. This treatment helps to maintain the long-term stability and reliability of the sensor, especially in environments with high humidity or strong chemical corrosion. The use of aluminum alloy as the material of the base 3 reduces the overall weight and facilitates installation and handling, and is particularly suitable for weight-sensitive industries such as aerospace and automobiles. The iron nickel-plated top cover 1 and the nickel-plated sensing pins provide excellent corrosion resistance and extend the service life of the sensor in harsh environments. The diameter ratio design of the top cover through hole 13 and the crimping ring 11 optimizes the internal space, ensures the functionality of the sensor, and is also convenient for production and maintenance. The nickel-plated sensing pins ensure good electrical contact, reduce interference in signal transmission, and improve the measurement accuracy of the sensor. In summary, the design of this metal-packaged sensor has been carefully considered in terms of material selection, size ratio and surface treatment, aiming to provide a high-performance sensor that is lightweight, corrosion-resistant, easy to install and maintain, and is suitable for a variety of industrial application scenarios.

[0036] Furthermore, the laser welding forming process temperature is 1200°C-1500°C.

[0037] Furthermore, the oil groove is configured to have a circular horizontal cross section.

[0038] Specifically, the temperature of the laser welding forming process is controlled at 1200℃-1500℃. This temperature range is set for the characteristics of stainless steel and iron-nickel-plated materials to ensure the stability of the molten pool during the welding process and avoid material performance degradation or welding defects caused by overheating. Within this temperature range, high-strength and high-quality welded joints can be achieved while maintaining the original properties of the metal material. Laser welding has the advantages of high energy density, small heat-affected zone, fast welding speed and high degree of automation. Welding in the temperature range of 1200℃-1500℃ can reduce thermal deformation and stress concentration during welding, thereby improving the dimensional accuracy and overall structural strength of the sensor. The oil tank is set to a circular horizontal cross-section. The circular cross-section has a uniform stress distribution characteristic, which can effectively reduce the stress concentration of the oil tank during oil filling and sensor operation, thereby improving the structural strength and sealing performance of the oil tank. The oil injected into the oil tank is mainly used for lubrication and sealing, preventing dust, moisture and other pollutants in the external environment from entering the sensor, while reducing the wear of internal components and extending the service life of the sensor. The circular oil groove design is easy to process and easy to keep the inside of the oil groove clean, ensuring the fluidity and uniform distribution of the oil. In addition, the circular structure also helps to form a stable oil film in the oil groove, further protecting the internal components of the sensor. By precisely controlling the temperature of laser welding, it is possible to ensure that the sensor maintains excellent mechanical properties and dimensional accuracy during the manufacturing process. The design of the circular oil groove combined with the laser welding forming process not only improves the overall stability of the sensor, but also enhances its environmental adaptability and durability. Due to the optimization of the oil groove design, the maintenance of the sensor becomes simpler, and the replacement and inspection of the oil can be carried out efficiently. In short, the laser welding forming process and the oil groove design of this metal package sensor both reflect the careful consideration of details, aiming to provide a high-performance, high-reliability and easy-to-maintain sensor product.

[0039] The present invention discloses a metal package sensor with a reinforced molded base, the sensor comprises a top cover 1, a diaphragm 2 and a base 3; the top surface of the base 3 is provided with a trumpet-shaped base opening 31 which is concave inwards, the edge of the base opening 31 is convex toward one side of the top cover 1 to form a support ring 311, the outer edge of the top cover 1 is provided with a crimping ring 11, the support ring 311 and the crimping ring 11 are respectively crimped on both sides of the diaphragm 2; the top cover 1 is provided with a trumpet-shaped top cover opening 12 which is concave inwards on one side facing the diaphragm 2, the top of the top cover 1 is provided with a 2, the bottom opening of the top cover opening 12 is connected to the side wall of the crimping ring 11; the side wall of the top cover opening 12 is inclined from the crimping ring 11 to the top cover through hole 13; the base 3, the diaphragm 2 and the top cover 1 are all made of metal materials; the base 3 is provided with a base through hole 33 that penetrates the base 3 mounting part and the bottom of the base opening 31, and the base 3 is reinforced and laser welded with the top cover 1; there is a gap between the diaphragm 2 and the upper end surface of the base 3; the gap is connected to the base through hole 33 to form an oil groove, and oil is injected into the oil groove. The advantage of the one-piece molding structure design of the base 3 in the above-mentioned sensor is that it reduces the joints between the components, reduces the potential leakage path and structural weaknesses, and thus improves the integrity and sealing of the overall structure. Since there are no additional joint parts, the one-piece molding structure can better withstand external forces and vibrations, and maintain the accuracy and stability of the sensor. The one-piece molding process can more accurately control the size of the base 3, reduce manufacturing errors, and improve the overall dimensional accuracy of the sensor. Reducing the number of parts means reducing potential failure points, thereby improving the long-term reliability of the sensor. One-piece molding reduces assembly steps, simplifies the production process, improves production efficiency, and reduces manufacturing costs. Due to the reduction in the number of parts, the workload of manual assembly and inspection is also reduced accordingly, reducing the possibility of human error. The one-piece molding structure makes the entire base 3 made of the same metal material, avoiding the problem of electrochemical corrosion between different materials. The one-piece molding structure makes it easier to achieve uniform surface treatment, such as plating, thereby improving corrosion resistance. The one-piece molding structure helps to achieve more uniform heat conduction, reduce thermal stress concentration, and improve the stability of the sensor in a temperature-changing environment. The one-piece molding structure reduces maintenance points, making the sensor easier to maintain and clean. Due to the simple structure, it is easier to locate problems during maintenance, reducing maintenance time and cost. The one-piece molding structure provides better sealing performance, protecting internal sensitive components from external environmental factors such as dust, moisture and chemical corrosion. The one-piece molding structure design of the base 3 in the sensor has significant advantages in improving structural integrity, accuracy and reliability, manufacturing efficiency, corrosion resistance, thermal management, and convenience of maintenance and repair, making it an ideal choice for high-performance sensor design.

[0040] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A metal package sensor with a reinforced molded base, characterized in that: The sensor comprises a top cover, a diaphragm and a base; The top surface of the base is provided with a trumpet-shaped base opening formed by an inward depression, the edge of the base opening protrudes toward one side of the top cover to form a support ring, the outer edge of the top cover is provided with a crimping ring, and the support ring and the crimping ring are respectively crimped to the two sides of the diaphragm; the top cover is provided with a trumpet-shaped top cover opening formed by an inward depression on one side facing the diaphragm, the top of the top cover is provided with a top cover through hole connected to the top cover opening, and the bottom opening of the top cover opening is connected to the side wall of the crimping ring; the side wall of the top cover opening is inclined toward the top cover through hole by the crimping ring; the base, the diaphragm and the top cover are all made of metal material; The base is provided with a base through hole penetrating the base mounting portion and the bottom of the base opening, and the base is reinforced and formed by laser welding with the top cover; A gap is provided between the diaphragm and the upper end surface of the base; the gap is connected with the through hole of the base to form an oil groove, and oil is injected into the oil groove.

2. The metal packaged sensor with a reinforced molded base according to claim 1, characterized in that: The outer side wall of the base is provided with a base flange.

3. The metal packaged sensor with a reinforced molded base according to claim 2, characterized in that: One side of the base flange is cut vertically to form a smooth cutting edge to avoid air.

4. The metal packaged sensor with a reinforced molded base according to claim 1, characterized in that: The sensor comprises a sensing pin, wherein the sensing pin is internally arranged in the base, and the sensing pin extends out of the base and externally receives a control device.

5. The metal packaged sensor with a reinforced molded base according to any one of claims 1 to 4, characterized in that: The base and the top cover are made of the same metal material.

6. The metal packaged sensor with a reinforced molded base according to claim 5, characterized in that: The metal material is a first metal material, and the first metal material is stainless steel.

7. The metal packaged sensor with a reinforced molded base according to claim 1, characterized in that: The ratio between the diameter of the top cover through hole and the inner diameter of the crimping ring is 1:3-12.

8. The metal packaged sensor with a reinforced molded base according to claim 4, characterized in that: The outer surface of the sensor pin is made of kovar metal, and the outermost surface of the sensor pin is covered with metal-plated material.

9. The metal packaged sensor with a reinforced molded base according to claim 1, characterized in that: The laser welding forming process temperature is 1200°C-1500°C.

10. The metal packaged sensor with a reinforced molded base according to claim 1, characterized in that: The oil groove is arranged to have a circular horizontal cross section.

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