A high-precision chip resistor capable of being quickly disassembled

Abstract

The application discloses a high-precision chip resistor which can be quickly disassembled, relates to the technical field of high-precision resistor devices, and is characterized in that the high-precision chip resistor is provided with a quick-disassembly module which can be pre-welded and fixed to a circuit board, and the resistor body is designed as a pluggable independent component, so that the quick installation and disassembly of the high-precision chip resistor are realized, which makes it possible to directly plug and unplug the resistor body when the resistor needs to be replaced or debugged, improves the efficiency of research and development, debugging, maintenance and upgrading to a certain extent, and is favorable for avoiding the risk of thermal damage to the circuit board pad and peripheral components, meanwhile, the second electrode made of gallium-based liquid metal is fixed on the first electrode, the second electrode is melted by the working heat of the resistor, and a liquid-state electric contact interface is formed in the connecting cavity, so that the stability of the electric connection between the resistor body and the quick-disassembly module is improved.

Description

Technical Field

[0001] This invention relates to the field of high-precision resistor technology, and in particular to a high-precision chip resistor that can be quickly disassembled. Background Technology

[0002] As an indispensable basic passive component in electronic circuits, chip resistors are widely used in the circuit board design of various electronic products such as communication equipment, industrial control, and precision instruments.

[0003] Currently, high-precision chip resistors in existing technologies are generally fixed and electrically connected to the circuit board by soldering during actual assembly and use. Although this traditional soldering assembly method can achieve reliable electrical conduction between the resistor and the circuit board, it has exposed many obvious defects in practical applications. First, since the resistor is integrated with the circuit board after being solidified by soldering, the disassembly, maintenance, and debugging of chip resistors are inconvenient. Especially in scenarios such as circuit board R&D prototyping, performance debugging, and circuit parameter optimization, if it is necessary to disassemble the chip resistor, it is necessary to use professional tools such as soldering irons and hot air guns for desoldering operations. The operation process is cumbersome and time-consuming, and the desoldering process is very likely to damage the circuit board pads, surrounding wiring, and adjacent components, which greatly reduces the efficiency of circuit board development and debugging. Second, the high temperature of soldering can easily damage the performance of high-precision resistors. The instantaneous high temperature and thermal shock generated during the soldering operation can easily cause the material properties of the internal resistive layer of the resistor to shift, resulting in problems such as resistance drift and decreased accuracy, which seriously affects the precision electrical performance and long-term stability of the resistor.

[0004] To address these issues, a high-precision chip resistor with quick disassembly is proposed. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of existing chip resistors being fixed to the circuit board by soldering, which makes disassembly inconvenient and easily damages the resistors during the soldering heating process. The invention proposes a high-precision chip resistor that can be quickly disassembled.

[0006] To address the problems existing in the prior art, the present invention adopts the following technical solution:

[0007] A high-precision surface mount resistor with quick disassembly includes a resistor body, which includes a resistive layer. An insulating layer is fixedly covered at the top center of the resistor body. First electrodes are fixedly wrapped around both ends of the resistive layer, and a second electrode is fixedly connected to the side of the first electrode furthest from the center of the resistive layer. A quick-release module is provided on the outside of the resistor body, including an insulating base. Connection cavities adapted to the outer dimensions of the first and second electrodes are provided inside both ends of the insulating base. First electrical connections are engaged at the lower outer positions of both ends of the insulating base. The first electrical connector has a C-shaped cross-section. The upper end of the first electrical connector extends through the end wall of the insulating base to the bottom of the corresponding connection cavity. The lower end of the first electrical connector is fixedly wrapped around the bottom of the end of the insulating base. A second electrical connector is provided on the upper outer side of both the left and right ends of the insulating base. The cross-section of the second electrical connector is an inverted L-shaped structure. The vertical end of the second electrical connector is firmly welded to the first electrical connector. The horizontal end of the second electrical connector covers the top of the connection cavity. The heat generated when the resistor body is working causes the second electrode to be in a liquid state in the corresponding connection cavity.

[0008] Preferably, the second electrode is made of gallium-based liquid metal, and the melting point of the gallium-based liquid metal is adjusted to 30-50°C by alloying ratio.

[0009] Preferably, the resistor body is tightly wrapped with a plastic shell before installation and use, and the resistor body is pre-cooled before installation and use at a temperature below 30°C.

[0010] Preferably, a second pressure plate is fixedly connected to the side of the horizontal end of the second electrical connector near the connecting cavity, and the second pressure plate is configured as an arc-shaped structure with one end curving upward.

[0011] Preferably, it includes a series-use mode in which multiple quick-release modules are arranged neatly in sequence along the lateral direction, and the second electrical connector located on the left side of one quick-release module is connected to the second electrical connector located on the right side of another quick-release module by soldering.

[0012] Preferably, another mode of series use is also included, in which a first groove is provided at the rear left end of the insulating base, and a first connecting piece fixedly connected to the first electrical connector on the left is embedded in the first groove, and a second groove is provided at the front left end of the insulating base, and a second connecting piece fixedly connected to the first electrical connector on the right is embedded in the second groove. In this mode, multiple quick-release modules are arranged neatly in sequence along the longitudinal direction, and the first connecting piece in one quick-release module is connected to the second connecting piece in another quick-release module by soldering.

[0013] Preferably, a slot is provided on one side of the insulating base, and a card block adapted to the slot is fixedly installed on the other side of the insulating base.

[0014] Preferably, the insulating base has horizontally arranged sliding grooves on both the front and rear sides. Each sliding groove has an electrical connecting piece slidably installed in it. A spring is arranged above the two electrical connecting pieces, and the spring is set in an inverted V-shape. The right end of the electrical connecting piece in front is firmly connected to the right end of the spring, and the left end of the electrical connecting piece in rear is firmly connected to the left end of the spring. An insulating plate covers the top center of the spring. The spring and the two electrical connecting pieces together form an electrical connection path.

[0015] Preferably, the upper end of the first electrical connector is fixedly connected to a first pressure plate disposed in the insulating base, and the first pressure plate is configured as a downwardly curved arc structure. After the electrical connector is driven, its end is inserted under the first pressure plate in the corresponding direction.

[0016] Preferably, a vertically arranged column is fixedly installed at the bottom center of the insulating plate, and the column moves through the spring. A slot adapted to the lower end of the column is opened in the center of the insulating base.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, by providing a quick-release module that can be pre-welded and fixed to the circuit board, and designing the resistor body as a pluggable independent component, it is beneficial to realize the rapid installation and removal of high-precision chip resistors. This allows the resistor body to be directly plugged in or unplugged when the resistor needs to be replaced or adjusted, which improves the efficiency of R&D, debugging, maintenance and upgrade to a certain extent, and helps to avoid the risk of thermal damage to the circuit board pads and surrounding components. At the same time, by fixing the second electrode made of gallium-based liquid metal on the first electrode, the resistor itself heats up and melts the low-melting-point second electrode, forming a liquid electrical contact interface in the connection cavity, which helps to improve the stability of the electrical connection between the resistor body and the quick-release module.

[0019] 2. In this invention, by setting a slot and a block splicing design on the insulating base, multiple quick-release modules can be flexibly and stably combined and used in series. At the same time, by installing an automatic switching structure containing springs and sliding electrical connecting pieces inside the insulating base, in a series circuit, an empty quick-release module without a resistor body can automatically form a conductive bridge through the internal springs and electrical connecting pieces to ensure circuit continuity. After a resistor is installed, it automatically switches to a resistive path. This design allows the device to support modular configuration and rapid reconfiguration of circuit parameters, which improves the convenience and reliability of system integration to a certain extent. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 This is an exploded view of the resistor body and quick-release module of the present invention;

[0022] Figure 2 This is a perspective view of the resistor body of the present invention;

[0023] Figure 3 This is a perspective view of the resistor body of the present invention installed in the quick-release module;

[0024] Figure 4 For the present invention Figure 3 Front sectional view of the middle structure;

[0025] Figure 5 For the present invention Figure 3 Side sectional view of the middle structure;

[0026] Figure 6 For the present invention Figure 3 Top sectional view of the middle structure;

[0027] Figure 7 This is a perspective view of the invention when used in the first series mode;

[0028] Figure 8 This is a schematic diagram of the circuit connection when the present invention is used in the first series mode;

[0029] Figure 9 This is a perspective view of the second series mode of the present invention.

[0030] Figure 10 This is a circuit connection diagram for use in the second series mode of the present invention;

[0031] Figure 11 This is a perspective view of the resistor body after it has been removed from the quick-release module of the present invention.

[0032] Figure 12 For the present invention Figure 11 Front sectional view of the middle structure;

[0033] Figure 13 For the present invention Figure 11 Top sectional view of the middle structure;

[0034] Figure 14 This is a perspective view of the resistor body of the present invention being vertically installed in the matching quick-release module.

[0035] In the picture:

[0036] 1. Resistor body; 11. Resistor layer; 12. Insulating layer; 13. First electrode; 14. Second electrode;

[0037] 2. Quick-release module;

[0038] 3. Insulating base; 31. Connecting cavity; 32. First electrical connector; 33. First pressure plate; 34. Second electrical connector; 35. Second pressure plate;

[0039] 4. First groove; 41. First connecting piece; 42. Second groove; 43. Second connecting piece;

[0040] 5. Card slot; 51. Card block;

[0041] 6. Slide; 61. Electrical connector; 62. Spring; 63. Insulating plate; 64. Post; 65. Slot. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] Example: This example provides a high-precision surface mount resistor that can be quickly disassembled. See [link to example]. Figure 1 - Figure 14Specifically, the resistor body 1 includes a resistive layer 11, and an insulating layer 12 is fixedly covered at the top center of the resistor body 1. First electrodes 13 are fixedly wrapped around both ends of the resistive layer 11, and a second electrode 14 is fixedly connected to the side of the first electrode 13 furthest from the center of the resistive layer 11. The second electrode 14 is made of gallium-based liquid metal, and the melting point of the gallium-based liquid metal is adjusted to 30-50℃ through alloy formulation. A quick-release module 2 is provided on the outside of the resistor body 1. The quick-release module 2 includes an insulating base 3, and connecting cavities 31 adapted to the outer dimensions of the first electrode 13 and the second electrode 14 are provided inside both ends of the insulating base 3. First electrical connectors 32 are engaged at the lower outer positions of both ends of the insulating base 3. Furthermore, the cross-section of the first electrical connector 32 is set as a C-shaped structure. The upper end of the first electrical connector 32 extends through the end wall of the insulating base 3 to the bottom of the corresponding connecting cavity 31. The lower end of the first electrical connector 32 is fixedly wrapped around the bottom of the end of the insulating base 3. The upper positions of the left and right sides of the insulating base 3 are provided with second electrical connectors 34. The cross-section of the second electrical connector 34 is set as an inverted L-shaped structure. The vertical end of the second electrical connector 34 is firmly welded to the first electrical connector 32. The horizontal end of the second electrical connector 34 covers the top of the connecting cavity 31. Taking the melting point of gallium-based liquid metal as 47°C as an example, under normal conditions, the second electrode 14 is solid. When in use, the heat generated when the resistor body 1 is working makes the second electrode 14 liquid in the corresponding connecting cavity 31.

[0044] In this device, during installation, the lower ends of the first electrical connectors 32 at both ends of the insulating base 3 inside the quick-release module 2 can be soldered to the connection positions on the circuit board to complete the pre-installation of the quick-release module 2. Then, the operator moves the second electrical connectors 34 above both ends of the insulating base 3 to open the upper part of the insulating base 3 and the connection cavities 31 at both ends. The operator can then place the resistor body 1 inside the insulating base 3, so that the first electrode 13 and the second electrode 14 at both ends of the resistor layer 11 inside the resistor body 1 are in the connection cavities 31 in the corresponding directions. In this state, the second electrode 14 is in a relatively closed independent space under the restriction of the first electrical connectors 32, the second electrical connectors 34 and the first electrode 13 in the connection cavities 31 in the corresponding directions.

[0045] After the device is powered on, the resistor body 1 generates heat, and the second electrode 14 has a low melting point, which is sufficient to melt the second electrode 14 into a liquid state. Although the gallium-based liquid metal is liquid after phase transition, its high surface tension and the formation of a surface oxide layer give it characteristics similar to solid-state flow suppression. It typically appears as a bead-like structure filling the independent space formed within the connection cavity 31, effectively enhancing the tightness of the connection between the first electrode 13 and the corresponding first electrical connector 32, and preventing leakage. In this device, the first electrical connector 32 and the second electrical connector 34 can be made of copper with high conductivity. When it is necessary to remove the resistor body 1 from the quick-release module 2, simply peel back the second electrical connector 34 covering both ends of the insulating base 3 to quickly remove the resistor body 1 from the quick-release module 2, effectively achieving convenient quick removal of the high-precision resistor. Depending on the requirements, the quick-release module 2 can also be configured as follows: Figure 14 The structure shown allows the resistor body 1 to be vertically inserted into the matching quick-release module 2, which helps to save the space occupied by the device on the horizontal plane of the circuit board.

[0046] In the specific implementation process, the resistor body 1 is tightly wrapped with a plastic shell before installation and use. The presence of the plastic shell not only protects the resistor body 1, but also restricts the second electrode 14. The resistor body 1 is pre-cooled before installation and use, and the pre-cooling temperature is below 30°C. The resistor body 1 can also be pre-cooled before being quickly removed from the quick-release module 2. In this device, when the resistor body 1 is installed into the corresponding quick-release module 2, after the resistor body 1 is pre-cooled, the plastic shell wrapped around the outside of the resistor body 1 needs to be removed, and it is quickly placed into the insulating base 3 and the connecting cavities 31 at both ends in the quick-release module 2. Then the second electrical connector 34 is closed. The pre-cooling treatment can ensure that the second electrode 14 remains solid in the initial stage of installation, which is convenient for positioning and placement and prevents liquid metal from overflowing and contaminating. Pre-cooling before disassembly is also to solidify the second electrode 14, which is convenient for separation.

[0047] In the specific implementation process, such as Figure 3 and Figure 4As shown, a second pressure plate 35 is fixedly connected to the side of the horizontal end of the second electrical connector 34 near the connecting cavity 31. The second pressure plate 35 is configured as an arc-shaped structure with one end raised upwards. In this device, the arc-shaped structure of the second pressure plate 35 allows the operator to quickly drive the horizontal end of the second electrical connector 34 to elastically lift and move away by moving the second pressure plate 35, thereby opening the top opening of the connecting cavity 31 to facilitate the installation of the resistor body 1. After the resistor body 1 is placed, the elastic rebound and pressing of the second electrical connector 34 and the second pressure plate 35 can make the second pressure plate 35 tightly press against the upper end of the first electrode 13, forming an upper and lower clamping structure together with the first electrical connector 32 below. This helps to ensure the tightness of the electrical connection and mechanical stability between the first electrode 13 and the first electrical connector 32, the second electrical connector 34 and the second pressure plate 35 in the corresponding direction.

[0048] In the specific implementation process, such as Figure 4 , Figure 7 and Figure 8 As shown, a series connection mode is included, in which multiple quick-release modules 2 are arranged neatly in a horizontal direction. The second electrical connector 34 on the left side of one quick-release module 2 is connected to the second electrical connector 34 on the right side of another quick-release module 2 by soldering. In this device, when multiple resistors need to be connected in series to obtain a higher resistance value or to perform voltage division, this horizontal series connection mode can be used. By directly connecting the second electrical connector 34 on the left side of one quick-release module 2 to the second electrical connector 34 on the right side of the adjacent quick-release module 2 by soldering, the series connection between the two modules and their internal resistor bodies 1 can be realized. This connection method is intuitive and robust, and is suitable for circuit designs with clear horizontal arrangement requirements.

[0049] In the specific implementation process, such as Figure 1 , Figure 3 , Figure 6 and Figure 9 - Figure 10As shown, another series-connected mode is also included. A first groove 4 is provided at the rear left end of the insulating base 3, and a first connecting piece 41 fixedly connected to the first electrical connector 32 on the left is embedded in the first groove 4. A second groove 42 is provided at the front left end of the insulating base 3, and a second connecting piece 43 fixedly connected to the first electrical connector 32 on the right is embedded in the second groove 42. In this mode, multiple quick-release modules 2 are arranged neatly in sequence along the longitudinal direction. The first connecting piece 41 in one quick-release module 2 is connected to the second connecting piece 43 in another quick-release module 2 by soldering. In this device, the first connecting piece 41 and the second connecting piece 43 can also be made of high-quality copper material with high conductivity. In another longitudinal series-connected application mode, electrical connection can be achieved by soldering the first connecting piece 41 at the rear left of one quick-release module 2 to the second connecting piece 43 in the second groove 42 at the front left of the adjacent quick-release module 2. This front-to-back connection method can save the space occupied in the lateral direction, making it possible to arrange multiple modules compactly in the longitudinal direction, which is suitable for the development layout of high-density integrated circuit boards.

[0050] In the specific implementation process, such as Figure 3 and Figure 9 As shown, a slot 5 is provided on one side of the insulating base 3, and a locking block 51 that matches the slot 5 is fixedly installed on the other side of the insulating base 3. In this device, the cooperation between the locking block 51 and the slot 5 enables multiple insulating bases 3 to be quickly mechanically positioned and locked when spliced ​​in the longitudinal direction, ensuring that the assembly is neat and stable, which helps to prevent misalignment and facilitates subsequent welding or overall installation. The same principle applies to the splicing of multiple insulating bases 3 in the transverse direction, so it is not shown in the figure.

[0051] In the specific implementation process, such as Figure 4 - Figure 6 and Figure 11 - Figure 13As shown, the insulating base 3 has horizontally arranged grooves 6 on both the front and rear sides. Each groove 6 contains a slidingly mounted electrical connecting piece 61. A spring 62 is positioned above and between two electrical connecting pieces 61, and the spring 62 has an inverted V-shaped structure. The right end of the front electrical connecting piece 61 is firmly connected to the right end of the spring 62, and the left end of the rear electrical connecting piece 61 is firmly connected to the left end of the spring 62. An insulating plate 63 covers the top center of the spring 62. The spring 62, together with the two electrical connecting pieces 61, forms an electrical connection path. In this device, the left and right ends of the spring 62 are connected to the front and rear electrical connecting pieces 61... The connection can be made by hinge or by directly forming the electrical connecting piece 61 and the spring piece 62 as one piece, depending on the actual needs. In the case of hinge, the right end of the front electrical connecting piece 61 is hinged to the right end of the spring piece 62, and the left end of the rear electrical connecting piece 61 is hinged to the left end of the spring piece 62. In the case of one piece, the electrical connecting piece 61 fixedly connected to the front right end of the spring piece 62 is bent horizontally to the left, and the electrical connecting piece 61 fixedly connected to the rear left end of the spring piece 62 is bent horizontally to the right. It is only necessary to ensure that when the spring piece 62 is pressed down, the front and rear electrical connecting pieces 61 are close to each other in the horizontal direction.

[0052] When the resistor body 1 is installed in the corresponding quick-release module 2, the loading of the resistor body 1 causes the bottom of the resistor body 1 to press down on the insulating plate 63. This causes the insulating plate 63 to move the middle position of the spring 62 downward. The spring 62 is deformed by the compression, and its left and right ends expand outward, causing the left and right ends of the spring 62 to move away from each other. At this time, the electrical connecting piece 61 located in front is pulled to the right, causing the left end of the front electrical connecting piece 61 to separate from the upper end of the first electrical connecting piece 32 on the left. Similarly, the electrical connecting piece 61 located in rear is pulled to the left, causing the right end of the rear electrical connecting piece 61 to separate from the upper end of the first electrical connecting piece 32 on the right. In this state, the resistor body 1 is normally electrically connected between the first electrical connecting pieces 32 on the left and right sides, and the current flows completely through the resistor body 1 to form a circuit.

[0053] When multiple of these devices are used in series, a secure connection can be made between multiple quick-release modules 2 beforehand. Then, the staff can select an appropriate number of resistor bodies 1 for quick installation according to actual development needs. If the number of resistor bodies 1 to be installed is less than the number of quick-release modules 2, some quick-release modules 2 will be left unloaded. In this case, since the resistor bodies 1 are not installed in the quick-release modules 2, the top of the insulating plate 63 in the corresponding quick-release module 2 is not subjected to downward pressure. Under the spring return of the spring 62, the front and rear electrical connecting pieces 61 are pulled horizontally away from the middle position inside the insulating base 3, thereby causing the front electrical connecting piece 61 to move to the left. Its end abuts against the top of the first electrical connector 32 on the left, causing the rear electrical connector 61 to move to the right, and its end abuts against the top of the first electrical connector 32 on the right. The electrical connector 61 and the spring 62 can be made of high-quality copper material with high conductivity. In this state, the first electrical connectors 32 on the left and right sides are connected by the electrical connector 61 and the spring 62 to form a direct connection path across the first electrical connectors 32 on the left and right sides. This mechanism ensures that even if the resistor body 1 is not installed in a quick-release module 2 in the series link, the circuit can be automatically kept connected by the "short-circuit bridge" inside the quick-release module 2 without the need for additional jumpers, which greatly improves the reliability and convenience of using multiple modules in series.

[0054] In the specific implementation process, such as Figure 4 and Figure 12 As shown, the upper end of the first electrical connector 32 is fixedly connected to a first pressure plate 33 disposed in the insulating base 3, and the first pressure plate 33 is configured as a downwardly curved arc structure. After the electrical connector 61 is driven, its end is inserted under the first pressure plate 33 in the corresponding direction. In this device, since the first pressure plate 33 is configured as a downwardly curved arc structure, it has a certain elasticity. When the electrical connector 61 slides and inserts under the corresponding first pressure plate 33, the first pressure plate 33 will generate a downward elastic pressure on the end of the electrical connector 61, thereby increasing the contact area and contact pressure between the two. This can ensure that when a short-circuit bridge is formed by means of the spring 62, the electrical contact resistance between the electrical connector 61 and the first electrical connector 32 is low enough and the connection is reliable.

[0055] In the specific implementation process, such as Figure 1As shown, a vertically arranged column rod 64 is fixedly installed at the bottom center of the insulating plate 63, and the column rod 64 is movably inserted through the spring 62. A slot 65 adapted to the lower end of the column rod 64 is opened at the center of the insulating base 3. In this device, the cooperation between the column rod 64 and the slot 65 can guide the up and down movement of the insulating plate 63 and the spring 62 to prevent deflection. On the other hand, the insertion of the column rod 64 into the slot 65 can also limit the excessive deformation of the spring 62 to a certain extent, which is beneficial to protecting the elastic life of the spring 62, thereby effectively ensuring the accuracy and repeatability of the mechanism's operation.

[0056] Specifically, the working principle of this invention is as follows:

[0057] During the initial installation phase, the quick-release module 2 is first welded and fixed to the predetermined position on the circuit board via the lower ends of the first electrical connectors 32 on both sides. Before installing the resistor body 1, it is pre-cooled to solidify the second electrode 14. Then, the protective plastic shell is removed, the second electrical connector 34 on the top of the quick-release module 2 is opened, and the pre-cooled resistor body 1 is accurately placed into the cavity of the insulating base 3, so that the second electrode 14 and the first electrode 13 at both ends are placed in the left and right connecting cavities 31. The second electrical connector 34 is closed, and the second pressure plate 35 on it will elastically press against the upper surface of the first electrode 13. At this time, the resistor body 1 is mechanically fixed, and its two ends are initially in contact with the first electrical connector 32 and the second electrical connector 34 in the connecting cavity 31 through the solid first electrode 13 and the second electrode 14.

[0058] When the circuit is powered on, the resistor body 1 starts to work and heat up. When its temperature rises above the melting point of the second electrode 14, the second electrode 14 gradually melts into a liquid state and flows in the sealed space of the connection cavity 31, fully wetting and connecting the contact area between the first electrode 13 and the first electrical connector 32 and the second electrical connector 34, forming a large-area, low-resistance liquid metal electrical contact interface, achieving excellent and stable electrical connection. When the resistor needs to be replaced, the resistor body 1 can be easily removed vertically from the quick-release module 2 by simply opening the second electrical connectors 34 on both sides through the second pressure plate 35.

[0059] In scenarios where multiple modules are used in series, whether connected horizontally or vertically, the mechanical splicing between multiple quick-release modules 2 is completed first, and the electrical connection is achieved by welding the first connecting piece 41 and the second connecting piece 43 on another quick-release module 2. Subsequently, the resistor body 1 can be inserted or removed into any quick-release module 2 as needed. When the quick-release module 2 with the resistor body 1 inserted is inserted, the spring 62 inside is pressed down, and the resistor body 1 is connected to the circuit. When the empty quick-release module 2 without the resistor body 1 inserted is not inserted, the spring 62 inside is lifted up, driving the electrical connecting piece 61 to slide, automatically forming a short-circuit bridge between the left and right first electrical connecting pieces 32, ensuring that the current path is not interrupted, and realizing the flexible configuration and high reliability of the series resistor network.

[0060] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-precision surface-mount resistor that can be quickly disassembled, comprising a resistor body (1), characterized in that: The resistor body (1) includes a resistive layer (11), and an insulating layer (12) is fixedly covered at the top center of the resistor body (1). The first electrode (13) is fixedly wrapped at both ends of the resistive layer (11), and a second electrode (14) is fixedly connected to the side of the first electrode (13) away from the center of the resistive layer (11). A quick-release module (2) is provided on the outside of the resistor body (1). The quick-release module (2) includes an insulating base (3), and a connecting cavity (31) is provided inside both ends of the insulating base (3). A first electrical connector (32) is engaged at the lower outer side of both ends of the insulating base (3), and the cross-section of the first electrical connector (32) is set as a C-shaped structure. The upper end of the first electrical connector (32) extends through the end wall of the insulating base (3) to the bottom of the corresponding connecting cavity (31). The lower end of the first electrical connector (32) is fixedly wrapped around the bottom of the end of the insulating base (3). The upper positions of the left and right sides of the insulating base (3) are provided with second electrical connectors (34), and the cross section of the second electrical connector (34) is set as an inverted L-shaped structure. The vertical end of the second electrical connector (34) is firmly welded to the first electrical connector (32). The horizontal end of the second electrical connector (34) covers the top of the connecting cavity (31). The heat generated when the resistor body (1) is working makes the second electrode (14) liquid in the corresponding connecting cavity (31).

2. The high-precision chip resistor with quick disassembly according to claim 1, characterized in that: The second electrode (14) is made of gallium-based liquid metal, and the melting point of the gallium-based liquid metal is adjusted to 30-50°C by alloying ratio.

3. A high-precision chip resistor with quick disassembly according to claim 1, characterized in that: The resistor body (1) is tightly wrapped with a plastic shell before installation and use. The resistor body (1) is pre-cooled before installation and use, and the temperature of the pre-cooling treatment is below 30°C.

4. A high-precision chip resistor with quick disassembly according to claim 1, characterized in that: The second electrical connector (34) has a second pressure plate (35) fixedly connected to the side of the horizontal end near the connecting cavity (31), and the second pressure plate (35) is configured as an arc-shaped structure with one end raised upward.

5. A high-precision chip resistor with quick disassembly according to claim 1, characterized in that: Including a series use mode, in which multiple quick-release modules (2) are arranged neatly in the lateral direction, and the second electrical connector (34) located on the left side of one quick-release module (2) is connected to the second electrical connector (34) located on the right side of another quick-release module (2) by soldering.

6. A high-precision chip resistor with quick disassembly according to claim 5, characterized in that: Another mode of series use is also included, in which a first groove (4) is provided at the rear left end of the insulating base (3), and a first connecting piece (41) fixedly connected to the first electrical connector (32) on the left is embedded in the first groove (4), and a second groove (42) is provided at the front left end of the insulating base (3), and a second connecting piece (43) fixedly connected to the first electrical connector (32) on the right is embedded in the second groove (42). In this mode, multiple quick-release modules (2) are arranged neatly in sequence along the longitudinal direction, and the first connecting piece (41) in one quick-release module (2) and the second connecting piece (43) in another quick-release module (2) are connected by soldering.

7. A high-precision chip resistor with quick disassembly according to claim 6, characterized in that: A slot (5) is provided on one side of the insulating base (3), and a card block (51) adapted to the slot (5) is fixedly installed on the other side of the insulating base (3).

8. A high-precision chip resistor with quick disassembly according to claim 6, characterized in that: The insulating base (3) has horizontally arranged sliding grooves (6) on both the front and rear sides. Each sliding groove (6) has an electrical connecting piece (61) slidably installed in it. A spring (62) is arranged above the two electrical connecting pieces (61), and the spring (62) is set in an inverted V-shaped structure. The right end of the electrical connecting piece (61) in front is firmly connected to the right end of the spring (62), and the left end of the electrical connecting piece (61) in the rear is firmly connected to the left end of the spring (62). An insulating plate (63) is covered in the middle of the top of the spring (62). The spring (62) and the two electrical connecting pieces (61) form an electrical connection path.

9. A high-precision chip resistor with quick disassembly according to claim 8, characterized in that: The upper end of the first electrical connector (32) is fixedly connected to a first pressure plate (33) disposed in the insulating base (3), and the first pressure plate (33) is configured as a downwardly curved arc structure. After the electrical connector (61) is driven, its end is inserted below the first pressure plate (33) in the corresponding direction.

10. A high-precision chip resistor with quick disassembly according to claim 8, characterized in that: A vertically arranged column (64) is fixedly installed at the bottom middle position of the insulating plate (63), and the column (64) is movably inserted through the spring (62). A slot (65) adapted to the lower end of the column (64) is opened in the middle position of the insulating base (3).

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