Chip resistor

Abstract

The utility model relates to the technical field of resistors, in particular to a chip resistor, which comprises a PCB (printed circuit board), a resistor body and a protective layer arranged on the surface of the resistor body, electrodes are fixed on two sides of the top of the PCB and are symmetrically distributed, clamping heads are arranged at two ends of the resistor body, the clamping heads are movably connected with the electrodes, and the protective layer is arranged on the surface of the resistor body. A quick release mechanism is arranged between the electrode and the clamping head, a protection mechanism is arranged on the surface of the PCB, a ventilation groove is formed in the surface of the PCB, protruding parts are fixed to the two sides of the clamping head, a groove is formed in the inner side of the electrode, and the protruding parts are connected with the groove in a clamped mode; according to the utility model, the resistor body can be quickly fixed on the PCB through the buckles at the two sides, the resistor body and the PCB can be conveniently disassembled and assembled, the adverse effect of welding on maintenance and replacement is avoided, the service life of the resistor is prolonged, the protective cover at the top can physically protect the resistor body, and the safety of the resistor body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of resistors, in particular to a chip resistor. Background Art

[0002] Chip resistors, also known as chip resistors, are a new generation of leadless or short-lead electronic components. The soldering surfaces of the lead-out ends are on the same plane. The main function of chip resistors in the circuit is to reduce the voltage, share part of the voltage, that is, voltage division, current limiting protection circuit, shunting, etc. They can also be used as time circuit components and sensors, etc.

[0003] A chip resistor is a resistor made by mixing metal powder and glass glaze powder and printing them on a substrate using a screen printing method, such as the chip resistor and chip resistor assembly disclosed in Chinese Patent Publication No. "CN106935341B". The chip resistor includes: an insulating substrate, including a first surface, a second surface opposite to the first surface, and a side surface arranged between the first surface and the second surface; a resistance layer, arranged on the first surface of the insulating substrate; a first terminal and a second terminal, respectively arranged on both ends of the insulating substrate and respectively connected to the two ends of the resistance layer; a third terminal, arranged between the first terminal and the second terminal on the first surface of the insulating substrate and having a recess.

[0004] The current chip resistors are usually small in size and fixed on the PCB by welding. The high integration density is not conducive to maintenance and replacement, which increases the maintenance cost. Due to circuit design and other reasons, there are often easily damaged resistor components on the PCB. If welding is used for these resistors, it is not conducive to maintenance and replacement. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art, such as being difficult to repair and replace, increasing the repair cost, and the like, and proposes a chip resistor.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A chip resistor is designed, comprising a PCB board, a resistor body and a protective layer arranged on the surface of the resistor body, electrodes are fixed on both sides of the top of the PCB board and the electrodes are symmetrically distributed, card joints are arranged at both ends of the resistor body, the card joints are movably connected with the electrodes, a quick release mechanism is arranged between the electrodes and the card joints, a protective mechanism is arranged on the surface of the PCB board, a ventilating groove is provided on the surface of the PCB board, protrusions are fixed on both sides of the card joint, a groove is provided on the inner side of the electrode, and the protrusion is card-engaged with the groove.

[0008] Furthermore, the quick-release mechanism includes a sliding seat, which is fixed to the top of the electrode, and a buckle is slidably connected to the inner side of the sliding seat. A guide hole is opened on one side of the buckle, and a guide rod is fixed to the inner side of the sliding seat. The guide rod is slidably connected to the guide hole, and a spring is sleeved on the surface of the guide rod and the two ends of the spring respectively contact the buckle and the inner wall of the sliding seat.

[0009] Furthermore, limiting blocks are fixed at both ends of the buckle, and guide grooves are provided on both sides of the sliding seat, and the limiting blocks are slidably connected to the guide grooves.

[0010] Furthermore, a push block is fixed on the top of the buckle, and the surface of the push block is provided with anti-slip textures.

[0011] Furthermore, a limiting frame is fixed on the top of the clamping joint, and the limiting frame is movably connected to the buckle.

[0012] Furthermore, the protective mechanism includes a strip buckle and a protective cover movably connected between the strip buckles, the strip buckles are fixed to both sides of the top of the PCB board, mounting strips are fixed on both sides of the protective cover, the mounting strips are clamped with the strip buckles, and a plurality of heat dissipation holes are opened on the surface of the protective cover.

[0013] The chip resistor proposed by the utility model has the beneficial effect that the resistor body can be quickly fixed on the PCB board through the buckles on both sides, and the two can be conveniently disassembled and installed, avoiding the adverse effects of welding on maintenance and replacement, which is beneficial to extending the service life of the resistor. The protective cover on the top can physically protect the resistor body and improve the safety of the resistor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 3 It is a three-dimensional schematic diagram of the clamping structure of the utility model;

[0017] Figure 4 For this utility model Figure 1 A partial enlarged view of point A in the middle.

[0018] In the figure: 1. PCB board; 2. resistor; 3. protective layer; 4. electrode; 5. card connector; 6. quick release mechanism; 61. sliding seat; 62. buckle; 63. guide hole; 64. guide rod; 65. spring; 7. protection mechanism; 71. bar buckle; 72. protective cover; 73. mounting strip; 74. heat dissipation hole; 8. ventilation groove; 9. protrusion; 10. groove; 11. limit block; 12. guide groove; 13. push block; 14. limit frame. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-4 A chip resistor comprises a PCB board 1, a resistor body 2 and a protective layer 3 arranged on the surface of the resistor body 2, wherein the protective layer 3 can protect the resistor body to prevent the resistor body from affecting performance in a humid environment, electrodes 4 are fixed on both sides of the top of the PCB board 1 and the electrodes 4 are symmetrically distributed, a clamping joint 5 is provided at both ends of the resistor body 2, the clamping joint 5 is movably connected with the electrode 4, a quick release mechanism 6 is provided between the electrode 4 and the clamping joint 5, a protective mechanism 7 is provided on the surface of the PCB board 1, a venting groove 8 is provided on the surface of the PCB board 1, protrusions 9 are fixed on both sides of the clamping joint 5, a groove 10 is provided on the inner side of the electrode 4, and the protrusion 9 is clamped with the groove 10; the chip resistor can quickly fix the resistor body 2 on the PCB board 1 through the buckles 62 on both sides, and convenient disassembly and installation can be achieved between the two, thereby avoiding the adverse effects of welding on maintenance and replacement, which is beneficial to prolonging the service life of the resistor, and the protective cover 72 on the top can physically protect the resistor body 2 and improve the safety of the resistor body 2.

[0021] In this embodiment, the quick-release mechanism 6 includes a sliding seat 61, which is fixed to the top of the electrode 4. A buckle 62 is slidably connected to the inner side of the sliding seat 61. The top of the buckle 62 is arc-shaped, and a guide hole 63 is opened on one side of the buckle 62. A guide rod 64 is fixed to the inner side of the sliding seat 61. The guide rod 64 is slidably connected to the guide hole 63. A spring 65 is sleeved on the surface of the guide rod 64 and the two ends of the spring 65 are respectively in contact with the buckle 62 and the inner wall of the sliding seat 61. The buckle 62 can cooperate with the spring 65 to quickly fix the resistor 2 on the PCB board 1, so as to facilitate the installation and removal of the resistor 2.

[0022] Furthermore, limiting blocks 11 are fixed at both ends of the buckle 62, and guide grooves 12 are provided on both sides of the sliding seat 61. The limiting blocks 11 are slidably connected to the guide grooves 12. The limiting blocks 11 can limit the buckle 62 so that the guide rod 64 and the guide hole 63 are always in contact.

[0023] Furthermore, a push block 13 is fixed to the top of the buckle 62 , and the surface of the push block 13 is provided with anti-slip textures. The push block 13 can fit the fingers to facilitate pushing the buckle 62 .

[0024] In addition, a limit frame 14 is fixed on the top of the clamping joint 5, and the limit frame 14 is movably connected to the buckle 62. The limit frame 14 can protect the buckle 62 to prevent accidental touch.

[0025] It should be noted that the protective mechanism 7 includes a strip buckle 71 and a protective cover 72 movably connected between the strip buckles 71, the protective cover 72 is made of elastic material, the strip buckle 71 is fixed to both sides of the top of the PCB board 1, and mounting strips 73 are fixed on both sides of the protective cover 72. The mounting strips 73 are snap-connected with the strip buckle 71, and a plurality of heat dissipation holes 74 are opened on the surface of the protective cover 72. The protective cover 72 can physically protect the resistor 2 and improve the safety of the resistor 2.

[0026] Working method: When disassembling and installing the resistor 2, the staff first aligns the protrusions 9 on the clamping joints 5 at both ends of the resistor 2 with the grooves 10 of the electrode 4 and presses the resistor 2 downward. The resistor 2 will squeeze the buckle 62 outward and compress the spring 65. When the buckle 62 moves to the top of the resistor 2, it can rebound and clamp the resistor 2. When disassembling, hold the pushing block 13 with your hand and push it outward. The pushing block 13 drives the buckle 62 to detach from the surface of the resistor 2, and the resistor 2 can be removed from the PCB board 1. The protective cover 72 can be fixed and removed by the strip buckle 71 and the mounting strip 73.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A chip resistor, comprising a PCB board (1), a resistor body (2) and a protective layer (3) arranged on the surface of the resistor body (2), Features: Electrodes (4) are fixed on both sides of the top of the PCB (1), and the electrodes (4) are symmetrically distributed; clamping joints (5) are provided at both ends of the resistor (2); the clamping joints (5) are movably connected to the electrodes (4); a quick release mechanism (6) is provided between the electrodes (4) and the clamping joints (5); a protective mechanism (7) is provided on the surface of the PCB (1); a venting groove (8) is provided on the surface of the PCB (1); protrusions (9) are fixed on both sides of the clamping joint (5); a groove (10) is provided on the inner side of the electrode (4); the protrusion (9) is clamped with the groove (10).

2. A chip resistor according to claim 1, Features: The quick release mechanism (6) comprises a sliding seat (61), the sliding seat (61) is fixed to the top of the electrode (4), a buckle (62) is slidably connected to the inner side of the sliding seat (61), a guide hole (63) is opened on one side of the buckle (62), a guide rod (64) is fixed to the inner side of the sliding seat (61), the guide rod (64) is slidably connected to the guide hole (63), a spring (65) is sleeved on the surface of the guide rod (64), and the two ends of the spring (65) are respectively in contact with the buckle (62) and the inner wall of the sliding seat (61).

3. A chip resistor according to claim 2, Features: Limit blocks (11) are fixed at both ends of the buckle (62), guide grooves (12) are provided on both sides of the sliding seat (61), and the limit blocks (11) are slidably connected to the guide grooves (12).

4. A chip resistor according to claim 2, Features: A pushing block (13) is fixed on the top of the buckle (62), and a surface of the pushing block (13) is provided with anti-slip patterns.

5. The chip resistor according to claim 2, Features: A limit frame (14) is fixed on the top of the clamping joint (5), and the limit frame (14) is movably connected to the buckle (62).

6. The chip resistor according to claim 1, Features: The protection mechanism (7) comprises a strip buckle (71) and a protection cover (72) movably connected between the strip buckles (71); the strip buckles (71) are fixed to two sides of the top of the PCB board (1); mounting strips (73) are fixed to both sides of the protection cover (72); the mounting strips (73) are snap-connected to the strip buckles (71); and a plurality of heat dissipation holes (74) are provided on the surface of the protection cover (72).

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