Stable and reliable chip resistor

Abstract

This utility model discloses a stable and reliable surface mount resistor, belonging to the field of surface mount resistor technology. It includes a surface mount resistor body, with an upper mounting plate and a lower mounting plate respectively positioned above and below the body. Two sets of support rods are fixedly connected to the upper surface of the lower mounting plate, with the top of each set of support rods contacting the bottom surface of the upper mounting plate. Each set of support rods has a snap-fit ​​groove at its top. Two sets of snap-fit ​​blocks are fixedly connected to the bottom surface of the upper mounting plate. This stable and reliable surface mount resistor, through the coordination of the surface mount resistor body, upper mounting plate, lower mounting plate, support rods, snap-fit ​​grooves, snap-fit ​​blocks, and limiting frame, conveniently and stably utilizes heat dissipation and heating structures to improve the working environment of the surface mount resistor body. Furthermore, by utilizing a heating element, a semiconductor cooling element, and a temperature sensor, it strives to ensure that the surface mount resistor is in a constant temperature environment, thus enabling stable and reliable use of the surface mount resistor.

Description

Technical Field

[0001] This utility model belongs to the field of surface mount resistor technology, and particularly relates to stable and reliable surface mount resistors. Background Technology

[0002] Chip resistors, also known as surface mount resistors, are a type of metal-glass enamel resistor. They are made by mixing metal powder and glass enamel powder and printing the mixture onto a substrate using screen printing. Chip resistors are characterized by their resistance to moisture and high temperatures, as well as their small temperature coefficient. They can greatly save circuit space and cost, allowing for more refined designs, and are therefore widely used in electronic devices.

[0003] The existing utility model with authorization announcement number CN221946885U discloses a chip resistor, including a substrate, a resistor body disposed in the middle of the top of the substrate, and a heat sink disposed at the bottom of the substrate, and electrode seats connected to both ends of the substrate; a support frame disposed on the top of the substrate, and the resistor body located inside the support frame, and silicone strips connected to the four sides of the inside of the support frame.

[0004] The above technical solution involves setting a support frame on the top of the substrate, which can enclose the resistor. The silicone strip inside the support frame can further press against the resistor to strengthen the connection between the resistor and the support frame. At the same time, support posts are inserted at the four ends of the substrate, which together with the support frame form a support skeleton. The substrate and resistor are placed in this support skeleton, which can effectively protect them from pressure damage. This makes the substrate and resistor less susceptible to damage or breakage due to external forces, greatly improving the service life of the chip resistor. However, with the above technical solution, the resistance value of the chip resistor will drift due to temperature changes when it operates in different temperature environments, leading to unstable circuit performance. Especially in fields such as precision measurement, sensors, medical equipment, and aerospace, temperature-induced resistance changes may seriously affect the accuracy and reliability of the system. The chip resistor only uses a heat sink to dissipate the heat generated during operation, but it cannot quickly cool down the high temperature of the chip resistor surface or quickly heat up the low temperature of the chip resistor surface, thus affecting the normal use of the chip resistor.

[0005] Therefore, we propose a stable and reliable surface mount resistor to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to solve the problem that existing technologies cannot maintain the operation of surface mount resistors at a constant temperature, and to propose a stable and reliable surface mount resistor.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A stable and reliable surface mount resistor includes a surface mount resistor body. An upper mounting plate and a lower mounting plate are respectively disposed above and below the surface mount resistor body. Two sets of support rods are fixedly connected to the upper surface of the lower mounting plate. The top end of each set of support rods contacts the bottom surface of the upper mounting plate, and each set of support rods has a snap-fit ​​groove at its top end. Two sets of snap-fit ​​blocks are fixedly connected to the bottom surface of the upper mounting plate, and the two sets of snap-fit ​​blocks respectively snap into the two sets of snap-fit ​​grooves. Limit frames are fixedly connected to both the upper surface of the lower mounting plate and the bottom surface of the upper mounting plate. Each limit frame... The inner walls of the upper mounting plate are in contact with the outer surface of the surface mount resistor body. A heating element is fixedly connected to the inner wall of the upper mounting plate, and the heating surface of the heating element is in contact with the upper surface of the surface mount resistor body. A thermoelectric cooler is fixedly connected to the inner wall of the lower mounting plate, and the cooling surface of the thermoelectric cooler is in contact with the bottom surface of the surface mount resistor body. The heat dissipation end of the thermoelectric cooler extends through the lower mounting plate to the bottom of the lower mounting plate. Two sets of temperature sensors are fixedly connected to the upper surface of the lower mounting plate. The heating element and the thermoelectric cooler are both connected to the two sets of temperature sensors via a PLC controller.

[0009] Preferably, the upper surface of the lower mounting plate and the bottom surface of the upper mounting plate are both fixedly connected to a support frame, and the two support frames are in contact with each other on their closest sides.

[0010] Preferably, each of the support frames has equidistant connecting slots on its outer surface, and there are at least two sets of connecting slots.

[0011] Preferably, each set of the snap-fit ​​blocks has a first threaded hole on its bottom surface, and the two sets of first threaded holes are respectively connected to the two sets of snap-fit ​​grooves. The upper surface of the upper mounting plate has two sets of mounting holes, and the two sets of first threaded holes are respectively connected to the two sets of mounting holes.

[0012] Preferably, each set of first threaded holes is internally threaded with a mounting bolt, and the bottom ends of the two sets of mounting bolts pass through the two sets of mounting holes, the two sets of first threaded holes and the two sets of snap-fit ​​grooves respectively, and are internally threadedly connected to the two sets of support rods.

[0013] Preferably, the two sides, the front and the back of the lower mounting plate are all fixedly connected to a support frame, and the upper surface of each support frame is provided with a second threaded hole.

[0014] Preferably, each set of second threaded holes is threaded with a fixing bolt, the bottom ends of the two sets of fixing bolts pass through the two sets of support connecting frames and extend to the bottom of the two sets of support connecting frames, and the outer surface of each set of fixing bolts is fixedly connected with an installation ring.

[0015] Preferably, a compression spring is fixedly connected to the bottom surface of each set of mounting rings, the inner walls of the two sets of compression springs are in contact with the outer surfaces of the two sets of fixed connecting bolts, a sliding ring is fixedly connected to the bottom end of each set of compression springs, the inner walls of the two sets of sliding rings are in contact with the outer surfaces of the two sets of fixed connecting bolts, and the bottom surfaces of the two sets of sliding rings are in contact with the upper surfaces of the two sets of support connecting frames.

[0016] In summary, the technical effects and advantages of this utility model are as follows:

[0017] By configuring the surface mount resistor body, upper mounting plate, lower mounting plate, support rod, snap-fit ​​slot, snap-fit ​​block, and limiting frame, a stable space can be formed between the upper and lower mounting plates. The limiting frame limits the surface mount resistor body between the upper and lower mounting plates, while the support rod, snap-fit ​​slot, and snap-fit ​​block improve the connection stability between the upper and lower mounting plates. This allows for convenient and stable improvement of the working environment of the surface mount resistor body through heat dissipation and heating structures. Furthermore, the combination of a heating element, a thermoelectric cooler, and a temperature sensor allows for convenient measurement of the ambient temperature of the surface mount resistor body. The PLC controller then automatically controls the heating element and thermoelectric cooler to heat the surface mount resistor body and cool it down, ensuring that the surface mount resistor operates in a constant temperature environment and can be used stably and reliably. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the support connecting frame of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the lower mounting plate, upper mounting plate, and chip resistor body of the stable and reliable chip resistor of this utility model after unfolding.

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the semiconductor cooling chip of this utility model;

[0021] Figure 4 This is a three-dimensional bottom view of the heating element of this utility model.

[0022] In the diagram: 1. Lower mounting plate; 2. Upper mounting plate; 3. Heating element; 4. Semiconductor cooling element; 5. Surface mount resistor body; 6. Limiting frame; 7. Temperature sensor; 8. Support rod; 9. Snap-fit ​​groove; 10. Snap-fit ​​block; 11. First threaded hole; 12. Mounting hole; 13. Mounting bolt; 14. Support frame; 15. Through slot; 16. Support connecting bracket; 17. Second threaded hole; 18. Fixed connecting bolt; 19. Mounting ring; 20. Compression spring; 21. Sliding ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-4 A stable and reliable surface mount resistor includes a surface mount resistor body 5. An upper mounting plate 2 and a lower mounting plate 1 are respectively provided above and below the surface mount resistor body 5. Support frames 14 are fixedly connected to the upper surface of the lower mounting plate 1 and the bottom surface of the upper mounting plate 2. The two support frames 14 are in contact with each other on their closest sides. By providing two support frames 14 between the upper mounting plate 2 and the lower mounting plate 1, the upper mounting plate 2 and the lower mounting plate 1 can be stably supported.

[0025] Each support frame 14 has equidistantly arranged connecting slots 15 on its outer surface. There are at least two sets of connecting slots 15. Through the two sets of connecting slots 15, the support frame 14 can form a connecting channel to dissipate the heat generated by the chip resistor body 5 and to connect the working environment of the chip resistor body 5 with the external environment.

[0026] Two sets of support rods 8 are fixedly connected to the upper surface of the lower mounting plate 1. The top of each set of support rods 8 is in contact with the bottom surface of the upper mounting plate 2. Each set of support rods 8 has a snap-fit ​​groove 9 at its top. Two sets of snap-fit ​​blocks 10 are fixedly connected to the bottom surface of the upper mounting plate 2. The two sets of snap-fit ​​blocks 10 are snapped into the two sets of snap-fit ​​grooves 9 respectively. The bottom surface of each set of snap-fit ​​blocks 10 has a first threaded hole 11. The two sets of first threaded holes 11 are connected to the two sets of snap-fit ​​grooves 9 respectively. Two sets of mounting holes 12 are opened on the upper surface of the upper mounting plate 2. The two sets of first threaded holes 11 are connected to the two sets of mounting holes 12 respectively. Through the first threaded holes 11, snap-fit ​​grooves 9 and mounting holes 12, they are connected in a corresponding manner, which can facilitate the installation and connection of the upper mounting plate 2 and the lower mounting plate 1.

[0027] Each set of first threaded holes 11 has a mounting bolt 13 threaded inside. The bottom ends of the two sets of mounting bolts 13 pass through the two sets of mounting holes 12, the two sets of first threaded holes 11 and the two sets of snap-fit ​​grooves 9 respectively, and are threadedly connected to the inside of the two sets of support rods 8. By using the mounting bolts 13 to thread through the two sets of mounting holes 12, the two sets of first threaded holes 11 and the two sets of snap-fit ​​grooves 9, the upper mounting plate 2 and the lower mounting plate 1 can be stably connected together to protect the chip resistor body 5.

[0028] Limiting frames 6 are fixedly connected to the upper surface of the lower mounting plate 1 and the bottom surface of the upper mounting plate 2. The inner wall of each limiting frame 6 is in contact with the outer surface of the chip resistor body 5. Support connecting frames 16 are fixedly connected to both sides, the front and back of the lower mounting plate 1. Each set of support connecting frames 16 has a second threaded hole 17 on its upper surface. Fixing the support connecting frames 16 to both sides, the front and back of the lower mounting plate 1 not only supports the chip resistor, but also makes it easy to install the chip resistor in the required position.

[0029] A heating element 3 is fixedly connected to the inner wall of the upper mounting plate 2. The heating element 3 is a sheet-like device that can convert electrical energy or other forms of energy into heat energy to achieve a heating function. The model of the heating element 3 is HD22-K8. The heating surface of the heating element 3 is in contact with the upper surface of the chip resistor body 5. A thermoelectric cooler 4 is fixedly connected to the inner wall of the lower mounting plate 1. The thermoelectric cooler 4 is a new type of cooling device that achieves cooling through the Peltier effect. The model of the thermoelectric cooler 4 is TEC1-12706. The cooling surface of the thermoelectric cooler 4 is in contact with the bottom surface of the chip resistor body 5. The heat dissipation end of the semiconductor cooling chip 4 extends through the lower mounting plate 1 and down to the bottom of the lower mounting plate 1. Each set of second threaded holes 17 is threaded with a fixing bolt 18. The bottom ends of the two sets of fixing bolts 18 pass through the two sets of support brackets 16 and extend to the bottom of the two sets of support brackets 16. Each set of fixing bolts 18 is fixedly connected to the outer surface of the outer surface with a mounting ring 19. The fixing bolts 18 can pass through the second threaded holes 17 and be threaded to the drilled holes to fix the support brackets 16 in the required position, thereby fixing the chip resistor in the required position.

[0030] Two sets of temperature sensors 7 are fixedly connected to the upper surface of the lower mounting plate 1. The temperature sensor 7 is a sensor that converts temperature variables into a standardized output signal that can be transmitted. The model of the temperature sensor 7 is PT100. The heating element 3 and the semiconductor cooling element 4 are both connected to the two sets of temperature sensors 7 through a PLC controller. A compression spring 20 is fixedly connected to the bottom surface of each mounting ring 19. The inner walls of the two sets of compression springs 20 are in contact with the outer surfaces of the two sets of fixed connecting bolts 18. A sliding ring 21 is fixedly connected to the bottom end of each set of compression springs 20. The inner walls of the two sets of sliding rings 21 are in contact with the outer surfaces of the two sets of fixed connecting bolts 18. The bottom surfaces of the two sets of sliding rings 21 are in contact with the upper surfaces of the two sets of support connecting brackets 16. By using the compression springs 20 and sliding rings 21 fixed under the mounting ring 19, the compression springs 20 can be compressed when the fixed connecting bolts 18 are twisted, until the elastic force in the compression springs 20 can buffer the impact force on the fixed connecting bolts 18.

[0031] The working principle of this utility model is as follows: In use, first connect the heating element 3, the thermoelectric cooler 4, and the temperature sensor 7 to the power supply. When installing this stable and reliable surface mount resistor, first manually place the surface mount resistor body 5 on the lower mounting plate 1 and the upper surface of the thermoelectric cooler 4, allowing the upper mounting plate 2 to cover the surface mount resistor body 5. This ensures that the bottom surface of the heating element 3 contacts the surface of the surface mount resistor body 5, and simultaneously allows the surface mount resistor body 5 to be secured within the limiting frame 6 fixed to the surface of the lower mounting plate 1 and the bottom surface of the upper mounting plate 2. The chip resistor body 5 is installed and positioned, and the two support frames 14 fixed on the surface of the lower mounting plate 1 and the bottom surface of the upper mounting plate 2 are in contact. Multiple through slots 15 opened on the outer surface of the support frame 14 can be used to connect the chip resistor with the external air. At the same time, multiple snap-fit ​​blocks 10 fixed on the bottom surface of the upper mounting plate 2 can be snapped into the snap-fit ​​slots 9 opened on the multiple support rods 8 fixed on the surface of the lower mounting plate 1, so as to facilitate the pre-connection between the lower mounting plate 1 and the upper mounting plate 2, thereby improving the stability of the chip resistor.

[0032] Next, the mounting bolt 13 is manually held and threaded through the mounting hole 12 to the first threaded hole 11 on the bottom surface of the snap-fit ​​block 10. At the same time, the mounting bolt 13 can pass through the snap-fit ​​groove 9 and be threaded into the support rod 8. This allows the lower mounting plate 1 and the upper mounting plate 2 to be securely installed together. This facilitates the use of the lower mounting plate 1 and the upper mounting plate 2 to provide stable protection and support for the chip resistor body 5, improving the stability and reliability of the chip resistor. The two sets of support connecting brackets 16 of the chip resistor are manually connected at the required positions, and holes corresponding to the second threaded hole 17 are drilled at these positions. The fixing bolt 18 can be threaded through the second threaded hole 17 and threaded into the drilled hole, thereby allowing the chip resistor to be stably installed in the required position for use.

[0033] During the use of this surface mount resistor, the resistor body 5 is connected to the external environment through the through slot 15, and the resistor body 5 itself generates heat during operation. The working environment of the resistor body 5 also changes due to changes in the ambient temperature. The two sets of temperature sensors 7 fixed on the lower mounting plate 1 can detect the working environment temperature of the resistor body 5. The PLC controller can then automatically control the power supply of the heating element 3 and the thermoelectric cooler 4. The heat generated by the heating element 3 is used to heat the working environment temperature of the resistor body 5, while the thermoelectric cooler 4 is used to cool the working environment temperature of the resistor body 5. This helps to keep the working environment temperature of the resistor body 5 constant, reducing the problem of resistance drift due to temperature changes and unstable circuit performance.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stable and reliable surface mount resistor, comprising a surface mount resistor body (5), characterized in that: An upper mounting plate (2) and a lower mounting plate (1) are respectively provided above and below the surface mount resistor body (5). Two sets of support rods (8) are fixedly connected to the upper surface of the lower mounting plate (1). The top of each set of support rods (8) is in contact with the bottom surface of the upper mounting plate (2). Each set of support rods (8) has a snap-fit ​​groove (9) at its top. Two sets of snap-fit ​​blocks (10) are fixedly connected to the bottom surface of the upper mounting plate (2). The two sets of snap-fit ​​blocks (10) are snapped into the two sets of snap-fit ​​grooves (9). Limiting frames (6) are fixedly connected to the upper surface of the lower mounting plate (1) and the bottom surface of the upper mounting plate (2). The inner wall of each limiting frame (6) is in contact with the surface mount resistor body (5). The outer surface of the resistor body (5) is in contact with the upper mounting plate (2). A heating element (3) is fixedly connected to the inner wall of the upper mounting plate (2). The heating surface of the heating element (3) is in contact with the upper surface of the surface mount resistor body (5). A thermoelectric cooler (4) is fixedly connected to the inner wall of the lower mounting plate (1). The cooling surface of the thermoelectric cooler (4) is in contact with the bottom surface of the surface mount resistor body (5). The heat dissipation end of the thermoelectric cooler (4) extends through the lower mounting plate (1) to the bottom of the lower mounting plate (1). Two sets of temperature sensors (7) are fixedly connected to the upper surface of the lower mounting plate (1). The heating element (3) and the thermoelectric cooler (4) are both connected to the two sets of temperature sensors (7) through a PLC controller.

2. The stable and reliable surface mount resistor according to claim 1, characterized in that: The upper surface of the lower mounting plate (1) and the bottom surface of the upper mounting plate (2) are both fixedly connected to support frames (14), and the two support frames (14) are in contact with each other on their closest sides.

3. The stable and reliable surface mount resistor according to claim 2, characterized in that: Each of the support frames (14) has equidistant connecting slots (15) on its outer surface, and there are at least two sets of connecting slots (15).

4. The stable and reliable surface mount resistor according to claim 1, characterized in that: Each set of the snap-fit ​​blocks (10) has a first threaded hole (11) on its bottom surface. The two sets of first threaded holes (11) are connected to the two sets of snap-fit ​​grooves (9) respectively. The upper surface of the upper mounting plate (2) has two sets of mounting holes (12). The two sets of first threaded holes (11) are connected to the two sets of mounting holes (12) respectively.

5. The stable and reliable surface mount resistor according to claim 4, characterized in that: Each set of first threaded holes (11) is internally threaded with mounting bolts (13). The bottom ends of the two sets of mounting bolts (13) pass through the two sets of mounting holes (12), the two sets of first threaded holes (11) and the two sets of snap-fit ​​grooves (9) respectively and are internally threadedly connected to the two sets of support rods (8).

6. The stable and reliable surface mount resistor according to claim 1, characterized in that: Supporting connecting frames (16) are fixedly connected to both sides of the lower mounting plate (1), the front side of the lower mounting plate (1), and the back side of the lower mounting plate (1). Each set of supporting connecting frames (16) has a second threaded hole (17) on its upper surface.

7. The stable and reliable surface mount resistor according to claim 6, characterized in that: Each set of second threaded holes (17) is threaded with a fixing bolt (18). The bottom ends of the two sets of fixing bolts (18) pass through the two sets of support frames (16) and extend to the bottom of the two sets of support frames (16). Each set of fixing bolts (18) is fixedly connected with an installation ring (19) on its outer surface.

8. The stable and reliable surface mount resistor according to claim 7, characterized in that: Each set of mounting rings (19) has a compression spring (20) fixedly connected to its bottom surface. The inner walls of the two sets of compression springs (20) are in contact with the outer surfaces of the two sets of fixed connecting bolts (18). Each set of compression springs (20) has a sliding ring (21) fixedly connected to its bottom end. The inner walls of the two sets of sliding rings (21) are in contact with the outer surfaces of the two sets of fixed connecting bolts (18). The bottom surfaces of the two sets of sliding rings (21) are in contact with the upper surfaces of the two sets of support connecting frames (16).

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