Power type precision alloy resistor

Abstract

The utility model relates to the technical field of circuit elements, and discloses a power type precision alloy resistor which comprises an alloy resistor body, the left end face and the right end face of the alloy resistor body are fixedly connected with electrode plates, the lower surfaces of the electrode plates are fixedly connected with a PCB, the lower surface of the top of the alloy resistor body is fixedly connected with an arc-shaped protrusion, and the lower surface of the top of the alloy resistor body is fixedly connected with the PCB. An arc-shaped groove is formed in the lower surface of the arc-shaped protrusion. Through the arrangement of the arc-shaped bulge and the arc-shaped groove, a certain gap is formed between the lower part of the alloy resistor body and the surface of a circuit board on which the alloy resistor body is mounted; the arc-shaped grooves are formed in the alloy resistor body, so that airflow flowing below the alloy resistor body can flow to the inner surfaces of the left side and the right side of the alloy resistor body arranged in the shape like the Chinese character'ji 'through guiding of the arc-shaped grooves, heat on the inner surfaces of the left side and the right side of the alloy resistor body is driven, and the overall heat dissipation effect of the alloy resistor body is further improved; and the working efficiency of the alloy resistor body is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit element technical field, concretely relates to a power type precision alloy resistance. BACKGROUND

[0002] Electronic complete machine product is developing towards miniaturization unceasingly, this to the size, performance and heat dissipation capacity under the power on of various elements in the circuit etc. higher requirement is proposed. Among them, the resistor becomes the important component in the circuit with the advantages of small volume, high precision, good stability and strong adaptability.

[0003] According to the precision alloy resistor (announcement number: CN210349484U) disclosed, in the above application, the thin film covered on the resistance body increases the cross section area of the middle section of the resistance body, the resistance value of the middle section is reduced, then the heat generation of the middle section is also reduced, the current density of the combination of the resistance body and the thin film layer is close to the copper electrode at both ends, the heat generation at both ends of the resistance body is increased, the heat can be dissipated to the electrode part in time, and the safety of the circuit is protected.

[0004] But the above-mentioned equipment in the actual use process, because the alloy resistance in the process of using heat gathers in the top position of the resistance body, and the overall heat dissipation of the electronic product radiates to the alloy resistance can only produce a small airflow nearby, the heat dissipation of the position below the alloy resistance bump is limited, thereby the overall use effect of the alloy resistance is limited to a certain extent, in view of this, we put forward a kind of power type precision alloy resistance. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of power type precision alloy resistance, can improve the heat dissipation efficiency of the space below alloy resistance body, ensure the overall working condition of alloy resistance body.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] A kind of power type precision alloy resistance, including alloy resistance body, the left and right two end surfaces of the alloy resistance body are fixedly connected with electrode sheet, the lower surface of the electrode sheet is fixedly connected with PCB board, the top lower surface of the alloy resistance body is fixedly connected with arc convex, the lower surface of the arc convex is provided with arc slot.

[0008] The utility model also includes the following features:

[0009] The alloy resistance body is arranged as "several" characters, so that there is a certain gap between the surface of the circuit board below the alloy resistance body and the same.

[0010] The number of the electrode pieces is two groups, and the two groups of electrode pieces are horizontally arranged at the left and right ends of the alloy resistance body; the number of the PCB boards is two groups, and the two groups of PCB boards correspond to the electrode pieces one by one.

[0011] The arc-shaped surface of the arc-shaped protrusion is arranged directly below the alloy resistance body, and the arc-shaped protrusion is arranged in an arc shape with the front and rear ends being narrow and the center being wide below the alloy resistance body, so that the airflow in the external environment can make the airflow below the alloy resistance body faster when flowing through the space below the alloy resistance body.

[0012] The arc-shaped groove is arranged at the center below the arc-shaped protrusion, so that the airflow flowing through the space below the alloy resistance body can flow to the inner surfaces of the left and right sides of the alloy resistance body arranged in the "J" shape through the guidance of the arc-shaped groove.

[0013] The inner groove is arranged on one side surface of the PCB board close to the center of the alloy resistance body, the inner wall of the PCB board is provided with the air-permeable hole, and the end of the air-permeable hole is provided with a circular truncated cone hole.

[0014] The number of the inner grooves is multiple groups, and the multiple groups of inner grooves are uniformly distributed in a linear array on the surface of the one side of the PCB board close to the center of the alloy resistance body.

[0015] Preferably, the air-permeable hole penetrates the multiple groups of inner grooves, the circular truncated cone hole includes a large-diameter end and a small-diameter end, the small-diameter end is arranged on one side close to the air-permeable hole, and the large-diameter end is arranged on one side away from the center of the PCB board, so that the air flowing in the external environment can more easily enter between the air-permeable holes through the circular truncated cone hole.

[0016] The utility model discloses obtain technical effect for: through setting arc-shaped protrusion and arc-shaped groove below the alloy resistance body arranged in the "J" shape, make the certain gap between the surface of the circuit board installed below the alloy resistance body and it, and through the guidance of arc-shaped protrusion and arc-shaped groove, make the airflow flowing through the space below the alloy resistance body can flow to the inner surfaces of the left and right sides of the alloy resistance body arranged in the "J" shape through the guidance of arc-shaped groove, and then drive the heat of the inner surfaces of the left and right sides of alloy resistance body, further improve the overall heat dissipation effect of alloy resistance body, guarantee the work efficiency of alloy resistance body, and through setting inner groove and air-permeable hole on the side wall of PCB board, so that the connecting place between the PCB board and the alloy resistance body has greater contact surface with external air, the air flowing in the external environment can more easily enter between the air-permeable holes through the circular truncated cone hole, and through the penetrability of the inner groove and the air-permeable hole, to improve the airflow speed and heat dissipation efficiency of the air near the end position of the alloy resistance body close to the alloy resistance body, guarantee the continuous and efficient work of the alloy resistance body. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the main body structure schematic view of the utility model;

[0018] Fig. 2 It is the bottom view structure schematic view of the utility model;

[0019] Fig. 3 It is the PCB board section view structure schematic view of the utility model.

[0020] In the drawing: 100, alloy resistance body; 200, electrode sheet; 300, PCB board; 400, arc-shaped protrusion; 410, arc-shaped groove; 310, inner groove; 320, air hole; 321, circular table hole. DETAILED DESCRIPTION

[0021] In order to make the utility model purposes and advantages more clearly, the following specific description of the utility model is combined with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the protection scope of the utility model. As used in this text, the terms "parallel" and "perpendicular" are not limited to their strict geometric definitions, but include reasonable and inconsistent tolerances for machining or human error;

[0022] Combined Figs. 1 to 3 The specific features of the power type precision alloy resistance are described in detail as follows:

[0023] A power type precision alloy resistance, comprising alloy resistance body 100, the left and right two end surfaces of alloy resistance body 100 are fixedly connected with electrode sheet 200, the lower surface of electrode sheet 200 is fixedly connected with PCB board 300, the top lower surface of alloy resistance body 100 is fixedly connected with arc-shaped protrusion 400, and the lower surface of arc-shaped protrusion 400 is provided with arc-shaped groove 410.

[0024] In an embodiment of the utility model, alloy resistance body 100 is made of manganese copper or iron chromium or nickel chromium alloy, and the material of arc-shaped protrusion 400 is the same as that of alloy resistance body 100, so that arc-shaped protrusion 400 can have the same conductivity coefficient and heat dissipation efficiency as alloy resistance body 100 itself. At the same time, alloy resistance body 100 is arranged in the shape of "several", so that there is a certain gap between the lower part of alloy resistance body 100 and the surface of the circuit board on which it is installed. In addition, the number of electrode sheets 200 is two groups, and the two groups of electrode sheets 200 are arranged horizontally on the left and right ends of alloy resistance body 100. Specifically, the number of PCB boards 300 is two groups, and the two groups of PCB boards 300 correspond to electrode sheets 200 one by one. The upper surface of the end part of PCB board 300 close to the center side of alloy resistance body 100 is in contact with the end part of alloy resistance body 100, so as to ensure the installation stability of alloy resistance body 100.

[0025] In addition, the arc-shaped surface of the arc-shaped protrusion 400 is arranged directly below the alloy resistance body 100, and the arc-shaped protrusion 400 is arranged in an arc shape with the two ends being narrow and the center being wide below the alloy resistance body 100, so that when the airflow in the external environment flows through the space below the alloy resistance body 100, due to the small space below the alloy resistance body 100 and the large space above the alloy resistance body 100, according to Bernoulli's principle, the flow rate at the space below the alloy resistance body 100 is larger, so that the airflow at the space below the alloy resistance body 100 is faster, thereby taking away the heat at this part faster, improving the heat dissipation effect of the alloy resistance body 100. Further, the arc-shaped groove 410 is arranged at the center below the arc-shaped protrusion 400, so that the airflow flowing through the space below the alloy resistance body 100 can be guided to flow to the left and right inner surfaces of the alloy resistance body 100 arranged in a 'U' shape through the arc-shaped groove 410, thereby driving the heat at the left and right inner surfaces of the alloy resistance body 100, further improving the overall heat dissipation effect of the alloy resistance body 100.

[0026] In the embodiment of the utility model, the PCB 300 is provided with a plurality of inner grooves 310 on one side surface near the center of the alloy resistance body 100, and the inner wall of the PCB 300 is provided with air holes 320, and the end of the air hole 320 is provided with a circular table hole 321. Specifically, the plurality of inner grooves 310 are evenly distributed in a linear array on the surface of the PCB 300 near the center of the alloy resistance body 100, so that the connection between the PCB 300 and the alloy resistance body 100 has a larger contact surface with the external air, thereby ensuring the stability of the installation of the alloy resistance body 100 while improving the heat dissipation efficiency of the connection between the alloy resistance body 100 and the PCB 300. At the same time, the air holes 320 penetrate the plurality of inner grooves 310, and the circular table hole 321 is provided with two groups, and the two groups of circular table holes 321 are mirror arranged at the two ends of the air hole 320. Specifically, the circular table hole 321 includes a large diameter end and a small diameter end, the small diameter end is arranged near one side of the air hole 320, and the large diameter end is arranged away from the center of the PCB 300, so that the air flowing in the external environment can more easily enter the air holes 320 through the circular table holes 321, and pass through the inner grooves 310 and the air holes 320, thereby improving the air flow rate and heat dissipation efficiency near the end of the PCB 300 near the alloy resistance body 100, and ensuring the continuous and efficient work of the alloy resistance body 100.

[0027] In the utility model, when using, alloy resistance body 100 is fixedly installed on external circuit board through the PCB board 300 set up at both ends thereof and is electrically connected through electrode piece 200, so that alloy resistance body 100 is connected into the working circuit of circuit board, in actual use process, through the " several " shape setting of alloy resistance body 100, the air flow rate below alloy resistance body 100 is compared with the air of other positions and has faster flow speed, thereby quickly taking away the heat generated by alloy resistance body 100 when working, and then guaranteeing that alloy resistance body 100 is always in the efficient working state, guaranteeing the use efficiency of alloy resistor.

Claims

1. A power precision alloy resistor, comprising an alloy resistor body (100), electrode pieces (200) are fixedly connected to left and right end faces of the alloy resistor body (100), characterized in that: The lower surface of the electrode sheet (200) is fixedly connected to a PCB board (300). The lower surface of the top of the alloy resistor body (100) is fixedly connected to an arc-shaped protrusion (400), and an arc-shaped groove (410) is formed on the lower surface of the arc-shaped protrusion (400).

2. The power type precision alloy resistor according to claim 1, wherein: The alloy resistor body (100) is arranged in a "Ji" shape.

3. The power precision alloy resistor of claim 1, wherein: The number of the electrode sheets (200) is set to two groups, and the two groups of electrode sheets (200) are horizontally arranged at the left and right ends of the alloy resistor body (100). The number of the PCB boards (300) is set to two groups, and the two groups of PCB boards (300) correspond to the electrode sheets (200) one by one.

4. The power precision alloy resistor of claim 1, wherein: The arc-shaped surface of the arc-shaped protrusion (400) is arranged directly below the alloy resistor body (100), and the arc-shaped protrusion (400) is arranged in an arc shape that is narrow at both the front and rear ends and wide at the center below the alloy resistor body (100).

5. The power precision alloy resistor of claim 1, wherein: The arc-shaped groove (410) is formed at the center of the lower part of the arc-shaped protrusion (400).

6. The power precision alloy resistor of claim 1, wherein: An inner groove (310) is formed on one side surface of the PCB board (300) close to the center of the alloy resistor body (100). Vent holes (320) are formed on the inner wall of the PCB board (300), and a frustum-shaped hole (321) is formed at the end of the vent hole (320).

7. The power type precision alloy resistor according to claim 6, wherein: The number of the inner grooves (310) is set to multiple groups, and the multiple groups of inner grooves (310) are uniformly distributed in a linear array on the surface of the PCB board (300) close to the center of the alloy resistor body (100).

8. The power type precision alloy resistor according to claim 7, wherein: The vent holes (320) penetrate through multiple groups of inner grooves (310). The frustum-shaped hole (321) includes a large-diameter end and a small-diameter end. The small-diameter end is arranged on one side close to the vent hole (320), and the large-diameter end is arranged on one side far from the center of the PCB board (300).

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