An alloy resistor

Abstract

The present invention discloses an alloy resistor, which includes a resistance layer, current electrodes connected to both ends of the resistance layer, and a voltage electrode connected to the resistance layer; the voltage electrode is not connected to the current electrodes. Moreover, the current electrodes connected to the resistance layer are larger than the voltage electrode, that is, the space utilization rate of the current electrodes is improved to facilitate the heat dissipation of the current electrodes.

Description

Technical Field

[0001] The present invention relates to the technical field of resistors. Background Art

[0002] With the rapid development of the electronics industry, electronic products tend to be highly reliable and multifunctional, and at the same time have the characteristics of stable operation, low loss, and adaptability to different working environments. This also places more requirements on the performance of components related to electronic products.

[0003] As the most common and multifunctional passive component in electronic products, resistors are usually required to have more performance and characteristics. Current electronic products have the following requirements for resistors: high power, high precision, low loss, high reliability, and strong adaptability. For resistor manufacturing enterprises, simple production processes and short manufacturing cycles can greatly improve product competitiveness.

[0004] The resistor element part of traditional resistors is a two-electrode part. Two voltage lines are drawn out in the PCB board wiring and fed back to the IC terminal, and the current value is calculated by using the voltage difference. However, in the past, due to heat dissipation requirements, the electrode size was enlarged, indirectly compressing the routing position of the voltage line, causing inconvenience in design and use. In addition, during the production process, since the resistance value process control is measured by probes at points, the measured resistance values will vary due to different probe positions. In addition, there are some four-electrode designs that divide the electrodes at both ends of the resistor into current electrodes (conductive electrodes) and voltage electrodes (test electrodes). Although the passing current (alternating current or direct current) can be controlled very small, the current electrodes will still be polarized, affecting the test accuracy. Therefore, two test electrodes are used for measurement (such as the Wheatstone bridge method), because there is no current passing through the output terminal. After knowing the distance between the two poles and the cross-sectional area of the object, the resistivity or conductivity of the object can be calculated. However, the problem with this four-electrode design is that separating the current electrodes and voltage electrodes further compresses the space of the current electrodes, resulting in poor heat dissipation of the product.

[0005] Therefore, a new technical solution is needed to solve the above problems. Summary of the Invention

[0006] Object of the Invention: The present invention provides an alloy resistor with a four-electrode design, and achieves the effect of high utilization rate of the current electrode space to improve the heat dissipation of the current electrode.

[0007] Technical Solution: To achieve the above object, the alloy resistor of the present invention can adopt the following technical solution:

[0008] An alloy resistor includes a resistance layer, current electrodes connected to both ends of the resistance layer, and voltage electrodes connected to the resistance layer; wherein, the voltage electrodes are not connected to the current electrodes, and the volume of each current electrode is greater than the volume of each voltage electrode.

[0009] Beneficial effects: In the present invention, the current electrode connected to the resistance layer is larger than the voltage electrode, that is, the space utilization rate of the current electrode is improved to facilitate the heat dissipation of the current electrode. Description of the Drawings

[0010] Figure 1 It is a side view schematic diagram of the alloy resistor in the first embodiment.

[0011] Figure 2 It is a bottom view schematic diagram of the alloy resistor in the first embodiment.

[0012] Figure 3 It is a side view schematic diagram of the alloy resistor in the second embodiment.

[0013] Figure 4 It is a bottom view schematic diagram of the alloy resistor in the second embodiment.

[0014] Figure 5 It is a bottom view schematic diagram of the alloy resistor in the third embodiment.

[0015] Figure 6 It is a bottom view schematic diagram of the alloy resistor in the fourth embodiment.

[0016] Figure 7 It is a bottom view schematic diagram of the alloy resistor in the fifth embodiment. Detailed Embodiments

[0017] The First Embodiment

[0018] Please refer to Figure 1 and Figure 2As shown in the figure, the alloy resistor provided in this embodiment includes a resistor layer 1, current electrodes 2 connected to both ends of the resistor layer 1, and a voltage electrode 3 connected to the resistor layer 1; the voltage electrode 3 is not connected to the current electrode 2. The current electrode 2 is larger than the voltage electrode 3. Among them, the current electrode 2 and the voltage electrode 3 located at the same end of the resistor layer 1 are both connected to the bottom surface of the resistor layer 1. And the width of the current electrode 2 is the same as the width of the resistor layer 1, and the voltage electrode 3 also does not exceed the width range of the resistor layer. The end face of the current electrode 2 and the end face of the resistor layer 1 are coplanar up and down. In this way, the top view of the overall resistor product is a regular square, and the overall structure is compact and regular, which is beneficial to the cooperation with the PCB board wiring or other components on the PCB board. Among them, in order to reasonably improve the space utilization rate on the bottom surface of the resistor layer 1, the bottom surface of the current electrode 2 is L-shaped, and the bottom surface of the voltage electrode 3 is square and located in the L-shaped notch of the current electrode 2. In this way, the current electrode 2 can extend in the space not involved in the voltage electrode 3, which is beneficial to increasing the volume of the current electrode 2 and facilitating heat dissipation. In the present invention, the volume of each current electrode 2 is larger than the volume of each voltage electrode 3. The current electrode needs a larger volume to increase the heat dissipation area. The voltage electrode is mainly used to measure the voltage signal after the current passes through the resistor body. The voltage electrode does not need to withstand a large current like the current electrode, and the voltage electrode does not require a high heat dissipation function. Therefore, when the space at the electrode position is limited, the volume of the current electrode 2 located at the same end of the resistor layer is larger than the volume of the voltage electrode 3.

[0019] Embodiment 2

[0020] As Figure 3 shown, in this embodiment, the current electrode 2 and the voltage electrode 3 located at the same end of the resistor layer 1 are both connected to the end face of the resistor layer 1. And the width of the current electrode 2 is the same as the width of the resistor layer 1, and similarly, the volume of each current electrode 2 is larger than the volume of each voltage electrode 3. In order to increase the volume of the current electrode 2, the bottom surface of the current electrode 2 is L-shaped, and the bottom surface of the voltage electrode 3 is square and located in the L-shaped notch of the current electrode 2. Although the volume of the current electrode 2 increases, it does not increase the length of the overall product, but bends outward in the current electrode 2 and extends in the width direction to form an L shape.

[0021] In this embodiment, as Figure 4 shown, the voltage electrodes 3 provided at both ends of the resistor layer 1 can be located at the positions where both ends of the resistor layer 1 are connected to the same side surface.

[0022] Embodiment 3

[0023] In this embodiment, the current electrode 2 and the voltage electrode 3 located at the same end of the resistance layer 1 are both connected to the end face of the resistance layer 1. The width of the current electrode 2 is the same as the width of the resistance layer 1, and similarly, the volume of each current electrode 2 is larger than the volume of each voltage electrode 3. In order to increase the volume of the current electrode 2, the bottom surface of the current electrode 2 is L-shaped, and the bottom surface of the voltage electrode 3 is square and located in the L-shaped notch of the current electrode 2. Although the volume of the current electrode 2 is increased, the length of the overall product is not increased. Instead, it is bent on the outside of the current electrode 2 and extended in the width direction to form an L-shape. Different from the second embodiment, Figure 5 As shown, of the voltage electrodes 3 at both ends of the resistor layer 1, one voltage electrode 3 is located where one end of the resistor layer 1 contacts the side surface of the resistor layer 1; the other voltage electrode 3' is located where the other end of the resistor layer 1 contacts the side surface of the resistor layer 1. This is to meet different PCB routing requirements.

[0024] Example 4

[0025] like Figure 6 As shown, in this embodiment, among the current electrode 2 and the voltage electrode 3 located at the same end of the resistor layer 1, the current electrode 2 is connected to the bottom surface of the resistor layer 1, or the current electrode 2 is connected to the end surface of the resistor layer 1. The voltage electrode 3 is connected to the side surface of the resistor layer 1, and two voltage electrodes 3 are connected to the same side surface of the resistor layer 1. The volume of each current electrode 2 is larger than the volume of each voltage electrode 3. In this embodiment, since the voltage electrode 3 is connected to the side surface of the resistor layer 1, it does not affect the space where the current electrode 2 is connected at the end of the resistor layer 1. The volume of the current electrode 2 can be made as large as possible to improve the heat dissipation effect while maintaining a compact structure.

[0026] Example 5

[0027] This embodiment is similar to the fourth embodiment, except that Figure 7 As shown, the two voltage electrodes 3 are respectively connected to the two side surfaces of the resistance layer 2 , that is, the two voltage electrodes 3 are separated on both sides of the resistance layer 1 to meet different PCB routing requirements.

[0028] There are many methods and approaches to implement the technical solution of the present invention. The above is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. An alloy resistor comprising a resistance layer, current electrodes connected to both ends of the resistance layer, and a voltage electrode connected to the resistance layer; characterized in that: The voltage electrodes are not connected to the current electrodes, and the volume of each current electrode is greater than the volume of each voltage electrode; The current electrode and voltage electrode located at the same end of the resistance layer are both connected to the end surface of the resistance layer, and the width of the current electrode is the same as the width of the resistance layer. The bottom surface of the current electrode is L-shaped, and the bottom surface of the voltage electrode is square and located in the L-shaped notch of the current electrode.

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