High-power thick-film resistor

Abstract

The utility model relates to the technical field of resistors, and discloses a high-power thick-film resistor which comprises a resistor body, a rectangular groove is formed in the upper end of the front surface of the resistor body, a replacement mechanism is arranged in the rectangular groove and comprises a connecting block and two screws, the connecting block is installed in the rectangular groove in a sliding mode, and the two screws are arranged in the rectangular groove. Two pins are fixedly connected to the front surface of the connecting block, two threaded grooves are formed in the upper surface of the connecting block, the two screws are installed in the two threaded grooves in a threaded mode, and through the arrangement of the connecting block and the two screws, the two screws can be rotated, so that the connecting block and the pins are detached from the interior of a rectangular groove in the resistor body; according to the high-power thick-film resistor provided by the utility model, the two pins can be replaced, so that after the high-power thick-film resistor is welded for multiple times, the two pins can be replaced, the thick-film resistor keeps relatively good weldability, and the use efficiency of the high-power thick-film resistor is improved.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, specifically a high-power thick-film resistor. Background Technology

[0002] High-power thick-film resistors are electronic components capable of withstanding high current and power. They are manufactured using thick-film technology and feature a ceramic substrate, resistive layer, and protective glaze. They are suitable for high-temperature and high-power environments such as power supplies and motor drives. They come in various packages, such as TO-220 and SOT-227, which facilitate heat dissipation and maintain stability. They offer a wide range of resistance values ​​and selectable accuracy to meet different application requirements. High-power thick-film resistors play an important role in the electronics industry and are widely used in various equipment and fields.

[0003] Currently, thick film resistors are typically fixed by soldering. However, for high-power thick film resistors, screws or clamps are usually used for fixing. After fixing, the leads need to be soldered. After multiple soldering cycles, the solderability of the thick film resistor decreases, leading to problems in assembly and maintenance, and affecting the use of the thick film resistor. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a high-power thick-film resistor, which solves the problem that the thick-film resistor is usually fixed with screws or clamps, and its pins need to be soldered after fixing. However, after multiple soldering cycles, the solderability of the thick-film resistor decreases, leading to problems in assembly and maintenance, and affecting the use of the thick-film resistor.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-power thick film resistor, comprising a resistor body, a rectangular groove formed at the upper end of the front surface of the resistor body, a connecting block slidably mounted inside the rectangular groove, two pins fixedly connected to the front surface of the connecting block, two threaded grooves formed on the upper surface of the connecting block, and two screws threadedly mounted inside the two threaded grooves.

[0006] The rectangular groove has positioning grooves on its left and right inner walls. Two positioning blocks are slidably installed inside the two positioning grooves, and both positioning blocks are fixedly connected to the connecting block.

[0007] The lower surface of the resistor is provided with a mounting groove.

[0008] A metal base is installed inside the mounting slot.

[0009] The metal base has a mounting hole at the rear end of its upper surface.

[0010] The metal base is T-shaped.

[0011] The lower surfaces of both positioning blocks have curved edges.

[0012] The lower ends of the two threaded grooves penetrate into the interior of the resistor body, and the lower ends of the two screws extend threadedly into the two threaded grooves inside the resistor body, respectively.

[0013] Compared with the prior art, the present invention provides a high-power thick-film resistor with the following advantages: the high-power thick-film resistor, through the setting of the connecting block and two screws, allows the two screws to be rotated, so that the connecting block and the pins can be removed from the rectangular groove on the resistor body and replaced. This allows the two pins of the high-power thick-film resistor to be replaced after multiple soldering operations, thereby maintaining good solderability of the thick-film resistor and improving the utilization efficiency of the high-power thick-film resistor. Attached Figure Description

[0014] Figure 1 This is a top view schematic diagram of the overall structure of the high-power thick film resistor of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal cross-sectional front view of the high-power thick film resistor of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall top view of the high-power thick film resistor of this utility model;

[0017] Figure 4 This is a cross-sectional view of the connecting block in this utility model.

[0018] In the diagram: 1. Resistor; 2. Metal base; 3. Mounting slot; 4. Rectangular slot; 5. Connecting block; 6. Screw; 7. Pin; 8. Threaded groove; 9. Positioning block; 10. Positioning slot; 11. Mounting hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4This utility model provides a new technical solution: a high-power thick film resistor, including a resistor body 1, which is the main body of the resistor, responsible for providing the resistance value and carrying the current. A rectangular groove 4 is provided on the upper end of the front surface of the resistor body 1 to accommodate a replacement mechanism, so that the pins 7 can be easily installed or replaced when replacing the resistor. A connecting block 5 is slidably installed inside the rectangular groove 4. Two pins 7 are fixedly connected to the front surface of the connecting block 5 for connecting the circuit and transmitting current. Two threaded grooves 8 are provided on the upper surface of the connecting block 5 for installing screws 6, so that the connecting block 5 and the two pins 7 can be fixed on the resistor body 1. Two screws 6 are installed in the internal threads of the two threaded grooves 8 for fixing the connecting block 5 and the resistor body 1.

[0021] When replacing the two pins 7, you can use a screwdriver or other tools to remove the two screws 6. After removing the two screws 6, you can take the connecting block 5 out of the rectangular slot 4, thereby removing the two pins 7 on the connecting block 5 and replacing the two pins 7.

[0022] Preferably, the left and right inner walls of the rectangular groove 4 are provided with positioning grooves 10 for installing positioning blocks 9 to ensure the correct position of the replacement mechanism in the resistor body 1. Two positioning blocks 9 are slidably installed inside the two positioning grooves 10. Both positioning blocks 9 are fixedly connected to the connecting block 5 for positioning and stabilizing the connecting block 5.

[0023] When installing the two pins 7, the two positioning blocks 9 on the connecting block 5 can be aligned with the two positioning slots 10, and the two positioning blocks 9 can be pushed into the two positioning slots 10, thereby pushing the connecting block 5 into the rectangular slot 4. Then, two screws 6 are installed into the two threaded slots 8 to install the connecting block 5 into the rectangular slot 4, thereby installing the pin 7 onto the resistor 1, so that the resistor 1 is connected to the pin 7. Afterwards, the high-power thick film resistor can be installed using screws or other fasteners.

[0024] Preferably, the connection block 5 and the two screws 6 are arranged so that the two screws 6 can be rotated, allowing the connection block 5 and the pins 7 to be removed from the rectangular slot 4 on the resistor body 1 and replaced. This allows the two pins 7 to be replaced after multiple soldering operations of the high-power thick film resistor, thereby maintaining good solderability of the thick film resistor and improving the utilization efficiency of the high-power thick film resistor.

[0025] Preferably, the lower surface of the resistor 1 is provided with a mounting groove 3.

[0026] Preferably, a metal base 2 is installed inside the mounting slot 3 to enhance the heat dissipation capacity of the resistor, since the metal base usually has good thermal conductivity.

[0027] Preferably, the upper surface of the metal base 2 has a mounting hole 11 at the rear end for mounting the resistor 1 onto a circuit board or other fixed structure by screws or other fixing devices.

[0028] Preferably, the lower ends of the two threaded grooves 8 penetrate into the interior of the resistor body 1, and the lower ends of the two screws 6 extend threadedly into the interior of the two threaded grooves 8 inside the resistor body 1.

[0029] Preferably, the metal base 2 is arranged in a "T" shape.

[0030] Preferably, the lower surfaces of both positioning blocks 9 have arc-shaped edges.

[0031] Structural Description: Resistor 1: This is the main part of the high-power thick film resistor, responsible for providing the resistance value and carrying the current;

[0032] Metal base 2: Installed inside the mounting slot 3, used to enhance the heat dissipation capacity of the resistor, and is usually made of metal with good thermal conductivity;

[0033] Mounting slot 3: Located on the lower surface of resistor 1, used to mount metal base 2;

[0034] Rectangular slot 4: Located at the upper end of the front surface of resistor 1, it is used to accommodate the replacement mechanism and facilitate the installation or replacement of pin 7;

[0035] Connecting block 5: Slidably installed inside rectangular slot 4, with two pins 7 fixedly connected to its front surface for connecting circuits and transmitting current;

[0036] Screw 6: Two screws are provided in total. The screws are threaded inside the threaded groove 8 and are used to fix the connecting block 5 and the resistor 1, so that the pin 7 can be stably connected to the resistor 1.

[0037] Pin 7: There are two of them, which are fixed on the front surface of the connecting block 5 and are used to connect the circuit. They are the connection points between resistor 1 and the external circuit.

[0038] Threaded groove 8: There are two in total, located on the upper surface of the connecting block 5, for mounting screws 6 to fix the connecting block 5 and the pin 7 on the resistor 1;

[0039] Positioning block 9: There are two of them. They are slidably installed inside the positioning groove 10 and fixedly connected to the connecting block 5. They are used to position and stabilize the connecting block 5.

[0040] Positioning slots 10: There are two in total, located on the left and right inner walls of the rectangular slot 4, used to install positioning blocks 9 to ensure the correct position of the replacement mechanism within the resistor 1;

[0041] Mounting hole 11: Located at the rear end of the upper surface of the metal base 2, it is used to mount the resistor 1 to a circuit board or other fixed structure by screws or other fixing devices.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-power thick-film resistor, characterized in that: The resistor (1) includes a rectangular groove (4) on the upper end of the front surface of the resistor (1), a connecting block (5) is slidably installed inside the rectangular groove (4), two pins (7) are fixedly connected to the front surface of the connecting block (5), and two threaded grooves (8) are opened on the upper surface of the connecting block (5). Two screws (6) are installed inside the threads of the two threaded grooves (8). The rectangular groove (4) has positioning grooves (10) on both the left and right inner walls. Two positioning blocks (9) are slidably installed inside the two positioning grooves (10). Both positioning blocks (9) are fixedly connected to the connecting block (5). A mounting groove (3) is provided on the lower surface of the resistor (1); A metal base (2) is installed inside the mounting slot (3); The metal base (2) has a mounting hole (11) at the rear end of its upper surface. The lower ends of the two threaded grooves (8) penetrate into the interior of the resistor (1), and the lower ends of the two screws (6) extend into the interior of the two threaded grooves (8) inside the resistor (1). The metal base (2) is set in a "T" shape; The lower surfaces of both positioning blocks (9) are curved.

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