Plane thick film power resistor

Abstract

The utility model discloses a planar thick-film power resistor, which relates to the technical field of electronic components and comprises a resistance plate and a metal pin mounted on one side of the resistance plate, the other side of the resistance plate is connected with a heat conducting plate, a heat conducting spring is mounted on one side of the heat conducting plate, and a graphite radiating fin is elastically attached to the tail end of the heat conducting spring; the resistor plate, the heat conduction plate, the heat conduction spring and the graphite cooling fin are all arranged in the insulating shell cylinder, and the metal pin penetrates outwards from the interior of the insulating shell cylinder; a plurality of heat dissipation through holes are formed in the four side surfaces of the insulating shell cylinder, the insulating shell cylinder is arranged to perform limited protection on the resistance plate and the graphite heat dissipation fins, and the plurality of heat dissipation through holes formed in the four side surfaces of the insulating shell cylinder are communicated with the inner groove, so that a good heat dissipation effect can be achieved while protection is performed; and the use effect is improved.

Description

Technical Field

[0001] The utility model discloses a planar thick film power resistor, which relates to the technical field of electronic components. Background Art

[0002] Planar thick film is an advanced microelectronics manufacturing technology that combines electronic materials, multi-layer wiring technology, surface micro-assembly and planar integration technology; this technology can form finer patterns with higher precision and flatness, so it is widely used in various electronic devices;

[0003] For example, a planar thick film power resistor with a Chinese patent announcement number of CN209149885U improves its heat dissipation efficiency and stability mainly by directly combining a heat dissipation base plate, a middle ceramic sheet and a resistor sheet. However, the existing planar thick film power resistor does not have a good protective effect when used. When subjected to external impact and extrusion, the resistor is very easy to be damaged. The resistor includes a resistor plate layer, which is a heat source. Generally, a heat sink is provided on the resistor plate layer for heat dissipation. However, the performance of the heat sink will decrease after a long time of use and needs to be replaced. In the prior art, most of the heat sinks are fixed to the resistor, and it is inconvenient to disassemble and use, which affects the use effect. Therefore, it is necessary to design a planar thick film power resistor to solve the above technical problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a planar thick film power resistor to solve the problems mentioned in the above background technology.

[0005] In order to achieve the above object, the utility model is implemented by the following technical scheme: a planar thick film power resistor, comprising a resistor plate and a metal pin installed on one side of the resistor plate, the other side of the resistor plate is connected to a heat conducting plate, one side of the heat conducting plate is installed with a heat conducting spring, and the end of the heat conducting spring is elastically attached with a graphite heat sink;

[0006] It also includes an insulating outer shell cylinder, wherein the resistor plate, the heat-conducting plate, the heat-conducting spring and the graphite heat sink are all arranged inside the insulating outer shell cylinder, and the metal pin passes through the inside of the insulating outer shell cylinder to the outside;

[0007] The four side surfaces of the insulating shell cylinder are provided with a plurality of heat dissipation through holes.

[0008] A further improvement is that: the insulating outer shell cylinder includes two left connecting cylinders and right connecting cylinders which are detachably connected to each other, the graphite heat sink is installed on the inner side of the right connecting cylinder, the resistor plate, the heat conducting plate and the heat conducting spring are all arranged on the inner side of the left connecting cylinder, and after the left connecting cylinder and the right connecting cylinder are connected to each other, the heat conducting spring can be pressed against one side of the graphite heat sink, and the metal pin passes through the inside of the left connecting cylinder to the outside.

[0009] A further improvement is that the opening sides of the left connecting cylinder and the right connecting cylinder are connected and disassembled by screwing together.

[0010] A further improvement is that: the upper and lower sides of the left connecting cylinder and the right connecting cylinder are respectively provided with outwardly protruding outer convex edge plates, so that the upper, lower, left and right sides of the insulating shell cylinder form inwardly concave inner grooves, and each of the heat dissipation holes is respectively connected to the inner grooves.

[0011] A further improvement is that the graphite heat sink is provided with a plurality of connecting holes, and each connecting hole is connected to the heat dissipation through hole.

[0012] A further improvement is that: the outer convex edge plate is provided with screw mounting holes.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The utility model has a simple and ingenious structure. It can provide limited protection for the resistor plate and the graphite heat sink by providing an insulating shell cylinder. The four side surfaces of the insulating shell cylinder are provided with a plurality of heat dissipation through holes connected to the inner groove. In this way, it can provide good heat dissipation while providing protection, thereby improving its use effect.

[0015] And the insulating shell cylinder is formed by a left connecting cylinder and a right connecting cylinder screwed together, wherein the graphite heat sink is installed in the right connecting cylinder, and the resistor plate is installed in the left connecting cylinder. Therefore, after the left connecting cylinder and the right connecting cylinder are assembled, the heat conducting plate on one side of the resistor plate is elastically fitted with the graphite heat sink through a heat conducting spring, and the heat generated by the resistor plate can be conducted to the graphite heat sink for rapid heat dissipation, which has a more positive and beneficial use effect than the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the disassembled structure of the left connecting cylinder and the right connecting cylinder of the utility model;

[0019] In the figure: resistor plate 1, metal pin 2, heat conducting plate 3, heat conducting spring 31, graphite heat sink 4, connecting hole 41, insulating shell cylinder 5, left connecting cylinder 51, right connecting cylinder 52, heat dissipation through hole 6, outer convex edge plate 7, screw mounting hole 71, inner groove 8. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] See also Figure 1-Figure 2 The utility model provides a technical solution of a planar thick film power resistor: it includes a resistor plate 1 and a metal pin 2 installed on one side of the resistor plate 1, a heat conducting plate 3 is connected to the other side of the resistor plate 1, a heat conducting spring 31 is installed on one side of the heat conducting plate 3, and a graphite heat sink 4 is elastically attached to the end of the heat conducting spring 31, so that the heat generated by the resistor plate 1 can be conducted to the graphite heat sink 4 and dissipated by the graphite heat sink 4, and also includes an insulating shell cylinder 5, the resistor plate 1, the heat conducting plate 3, the heat conducting spring 31 and the graphite heat sink 4 are all arranged inside the insulating shell cylinder 5, the metal pin 2 penetrates from the inside of the insulating shell cylinder 5 to the outside, the insulating shell cylinder 5 is made of insulating and high temperature resistant plastic or silicone, the insulating shell cylinder 5 can effectively protect the internal resistor plate 1, the heat conducting plate 3, the heat conducting spring 31 and the graphite heat sink 4 to avoid being squeezed by the outside, and a plurality of heat dissipation through holes 6 are opened on the four side surfaces of the insulating shell cylinder 5, which play a good heat dissipation role inside the insulating shell cylinder 5.

[0022] In this embodiment, the insulating shell cylinder 5 includes two mutually detachably connected left and right connecting cylinders 51 and 52, the graphite heat sink 4 is installed on the inner side of the right connecting cylinder 52, the resistor plate 1, the heat conducting plate 3 and the heat conducting spring 31 are all arranged on the inner side of the left connecting cylinder 51, the metal pin 2 penetrates from the inside of the left connecting cylinder 51 to the outside, and the graphite heat sink 4 is separately arranged from the resistor plate 1. When the left connecting cylinder 51 and the right connecting cylinder 52 are connected to each other, the heat conducting plate 3 on one side of the resistor plate 1 can be pressed against one side of the graphite heat sink 4 through the heat conducting spring 31, thereby achieving the heat conduction effect of the resistor plate 1, which is also convenient for disassembling and assembling the insulating shell cylinder 5, and replacing the resistor plate 1 and the graphite heat sink 4 inside the left connecting cylinder 51 and the right connecting cylinder 52 respectively. ; In the above technical scheme, preferably, the left connecting cylinder 51 and the right connecting cylinder 52 are connected by screwing and disassembling on one side of the opening, so that the disassembly and assembly are simpler and more convenient, but it is not limited to this connection method, and the snap connection or screw connection method in the prior art can also be adopted; the left connecting cylinder 51 and the right connecting cylinder 52 are respectively provided with outer convex edge plates 7 protruding outward on the upper and lower sides. When an external object squeezes the insulating shell cylinder 5, the outer convex edge plates 7 can play a supporting role, so that the insulating shell cylinder 5 forms an inner groove 8 concave inward on the upper, lower, left and right sides, and it is not easy to block the heat dissipation through-holes 6. Each heat dissipation through-hole 6 is respectively connected to the inner groove 8, so that the heat in the insulating shell cylinder 5 can enter the outer inner groove 8 through the heat dissipation through-hole 6 for heat dissipation.

[0023] Furthermore, the graphite heat sink 4 is provided with a plurality of connecting holes 41 , and each connecting hole 41 is connected to the heat dissipation through hole 6 , which is beneficial to the heat dissipation effect of the graphite heat sink 4 .

[0024] The four outer convex edge plates 7 are provided with screw mounting holes 71 , which facilitates mounting the corresponding outer convex edge plates 7 on the external designated mounting plates.

[0025] It should be noted that the utility model is a planar thick film power resistor, which mainly improves the above structure. The functions, components and structures not mentioned can be implemented by using components and structures in the prior art that can realize the corresponding functions.

[0026] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A planar thick film power resistor, comprising a resistor plate (1) and a metal pin (2) mounted on one side of the resistor plate (1), characterized in that: The other side of the resistor plate (1) is connected to a heat conducting plate (3), one side of the heat conducting plate (3) is provided with a heat conducting spring (31), and the end of the heat conducting spring (31) is elastically attached to a graphite heat sink (4); It also includes an insulating outer shell cylinder (5), wherein the resistor plate (1), the heat conducting plate (3), the heat conducting spring (31) and the graphite heat sink (4) are all arranged inside the insulating outer shell cylinder (5), and the metal pin (2) penetrates from the inside of the insulating outer shell cylinder (5) to the outside; The insulating shell cylinder (5) is provided with a plurality of heat dissipation through holes (6) on four side surfaces.

2. A planar thick film power resistor according to claim 1, characterized in that: The insulating outer shell cylinder (5) comprises a left connecting cylinder (51) and a right connecting cylinder (52) which are detachably connected to each other. The graphite heat sink (4) is installed on the inner side of the right connecting cylinder (52). The resistor plate (1), the heat conducting plate (3) and the heat conducting spring (31) are all arranged on the inner side of the left connecting cylinder (51). After the left connecting cylinder (51) and the right connecting cylinder (52) are connected to each other, the heat conducting spring (31) can be pressed against one side of the graphite heat sink (4), and the metal pin (2) passes through the inner side of the left connecting cylinder (51) to the outside.

3. A planar thick film power resistor according to claim 2, characterized in that: The opening sides of the left connecting cylinder (51) and the right connecting cylinder (52) are connected and disassembled by screwing together the threads.

4. A planar thick film power resistor according to claim 3, characterized in that: Outwardly protruding outer convex plates (7) are respectively provided on the upper and lower sides of the left connecting cylinder (51) and the right connecting cylinder (52), so that inwardly concave inner grooves (8) are formed on the upper, lower, left and right sides of the insulating outer shell cylinder (5), and each of the heat dissipation through holes (6) is respectively connected to the inner grooves (8).

5. A planar thick film power resistor according to claim 1 or 2, characterized in that: The graphite heat sink (4) is provided with a plurality of communication holes (41), and each communication hole (41) is connected to a heat dissipation through hole (6).

6. A planar thick film power resistor according to claim 4, characterized in that: The outer convex edge plate (7) is provided with a screw mounting hole (71).

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