CN210778077U

CN210778077U - Alloy resistor

Info

Publication number: CN210778077U
Application number: CN201921797864.5U
Authority: CN
Inventors: 杨漫雪; 骆达文; 肖酉; 桑玲玲
Original assignee: Nanjing Sart Science and Technology Development Co Ltd
Current assignee: Nanjing Sart Science and Technology Development Co Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-06-16
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses an alloy resistor, which comprises a resistance layer, current electrodes connected with two ends of the resistance layer, and voltage electrodes connected with the resistance layer; the voltage electrode is not connected to the current electrode. And the current electrode connected with the resistance layer is larger than the voltage electrode, namely the space utilization rate of the current electrode is improved so as to be beneficial to the heat dissipation of the current electrode.

Description

Alloy resistor

Technical Field

The utility model relates to a technical field of resistor.

Background

With the rapid development of the electronic industry, electronic products tend to have high reliability and multiple functions, and have the characteristics of stable operation, low loss, adaptability to different working environments and the like, so that more requirements on the performance of components related to the electronic products are provided.

Resistors are generally required to have more performance and characteristics as the most common passive components with the most diversified functions in electronic products. The current electronic products put the following requirements on the resistor: high power, high precision, low loss, high reliability, strong adaptability and the like. For resistor manufacturing enterprises, the production process is simple, the manufacturing period is short, and the product competitiveness can be greatly improved.

The resistance element part of the traditional resistor is a 2-electrode part, 2 voltage lines are pulled out in the wiring of a PCB and fed back to an IC end, so that the current value is calculated by utilizing the pressure difference, but the electrode size is amplified due to the heat dissipation requirement in the prior art, the wiring positions of the voltage lines are indirectly compressed, the inconvenience in design and use is caused, in addition, in the production process, the point measurement is carried out through probes due to the fact that the process control of the resistance value is carried out through probes, the resistance value measured due to the difference of the positions of the probes has variability, and in addition, the design of some 4 electrodes is carried out, and the electrodes at the two ends of the resistor are divided into a current electrode (a conductive electrode. Although the passing current (alternating current or direct current) can be controlled to be small, the current electrode still generates polarization, and the testing precision is influenced. For this purpose, two test electrodes are used for the measurement (for example, the Wheatstone bridge method), since no current flows through the outputs. Knowing the distance between two electrodes and the cross-sectional area of the object, the resistivity or conductivity of the object can be calculated. However, the 4-electrode design has a problem in that the current electrode and the voltage electrode are separated from each other, and the space of the current electrode is further reduced, thereby deteriorating heat dissipation of the product.

Therefore, a new technical solution is needed to solve the above problems.

Disclosure of Invention

The purpose of the invention is as follows: the utility model provides an adopt 4 electrode design's alloy resistor to realize the high effect of current electrode space utilization, with improvement current electrode thermal diffusivity.

The technical scheme is as follows: in order to achieve the above purpose, the alloy resistor of the present invention can adopt the following technical solutions:

an alloy resistor comprises a resistance layer, current electrodes connected to two 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.

Has the advantages that: the utility model discloses in, the electric current electrode that the resistance layer is connected is greater than voltage electrode, improves the space utilization of electric current electrode promptly in order to be favorable to the heat dissipation of electric current electrode.

Drawings

Fig. 1 is a schematic side view of an alloy resistor according to a first embodiment.

Fig. 2 is a schematic bottom view of an alloy resistor according to the first embodiment.

Fig. 3 is a schematic side view of an alloy resistor according to a second embodiment.

Fig. 4 is a schematic bottom view of an alloy resistor according to a second embodiment.

Fig. 5 is a schematic bottom view of an alloy resistor according to a third embodiment.

Fig. 6 is a schematic bottom view of an alloy resistor according to a fourth embodiment.

Fig. 7 is a schematic bottom view of an alloy resistor according to a fifth embodiment.

Detailed Description

Example one

Referring to fig. 1 and fig. 2, the alloy resistor provided in this embodiment includes a resistive layer 1, current electrodes 2 connected to two ends of the resistive layer 1, and voltage electrodes 3 connected to the resistive 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. Wherein, the current electrode 2 and the voltage electrode 3 which are positioned at the same end of the resistance layer 1 are both connected on the bottom surface of the resistance layer 1. The width of the current electrode 2 is the same as the width 1 of the resistance layer, the voltage electrode 3 does not exceed the width range of the resistance layer, and the end face of the current electrode 2 is coplanar with the end face of the resistance layer 1. The overlooking of the integral resistor product is regular square, the integral structure is compact and regular, and the integral resistor product is favorable for being matched with the wiring of a PCB or other elements on the PCB. 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 is located in the L-shaped gap of the current electrode 2. Thus, the current electrode 2 can be extended in a space not involved by the voltage electrode 3, which is advantageous for increasing the volume of the current electrode 2 and standing on 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 electrodes require a larger volume to increase the heat dissipation area. The voltage electrode is mainly used for measuring a voltage signal after the current passes through the resistor body, the voltage electrode does not need to bear large current like the current electrode, and the voltage electrode does not need a higher heat dissipation function. Therefore, when the space for the electrode position is limited, the volume of the current electrode 2 at the same end of the resistance layer is larger than that of the voltage electrode 3.

Example two

As shown in fig. 3, in the present embodiment, the current electrode 2 and the voltage electrode 3 located at the same end of the resistive layer 1 are connected to the end face of the resistive layer 1. And the width of the current electrodes 2 is the same as the width of the resistive layer 1, while, as such, the volume of each current electrode 2 is greater 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 is located in the L-shaped gap of the current electrode 2. The current electrode 2 is bent and extended in the width direction at the outer side of the current electrode 2 to form an L shape, although the volume is increased, without increasing the length of the entire product.

In the present embodiment, as shown in fig. 4, the voltage electrodes 3 disposed at two ends of the resistive layer 1 may be located at positions where the two ends of the resistive layer 1 are connected to the same side of the resistive layer 1.

EXAMPLE III

In the present embodiment, the current electrode 2 and the voltage electrode 3 located at the same end of the resistive layer 1 are connected to the end surface of the resistive layer 1. And the width of the current electrodes 2 is the same as the width of the resistive layer 1, while, as such, the volume of each current electrode 2 is greater 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 is located in the L-shaped gap of the current electrode 2. The current electrode 2 is bent and extended in the width direction at the outer side of the current electrode 2 to form an L shape, although the volume is increased, without increasing the length of the entire product. Unlike the second embodiment, as shown in fig. 5, one voltage electrode 3 among the voltage electrodes 3 at both ends of the resistive layer 1 is located at a position where one end of the resistive layer 1 is in contact with one side surface of the resistive layer 1; the other voltage electrode 3' is located at the other end of the resistive layer 1 in contact with the other side of the resistive layer 1. To cope with different PCB routing requirements.

Example four

As shown in fig. 6, in the present embodiment, of the current electrode 2 and the voltage electrode 3 located at the same end of the resistive layer 1, the current electrode 2 is connected to the bottom surface of the resistive layer 1, or the current electrode 2 is connected to the end surface of the resistive layer 1. The voltage electrodes 3 are connected to the side of the resistive layer 1, and the two voltage electrodes 3 are connected to the same side of the resistive layer 1. The volume of each current electrode 2 is greater than the volume of each voltage electrode 3. In this embodiment, since the voltage electrodes 3 are connected to the side surfaces of the resistive layer 1, the space in which the current electrodes 2 are connected to the end portions of the resistive layer 1 is not affected, and the current electrodes 2 can be made as large as possible to increase the heat dissipation effect in response to a demand for compact structure.

EXAMPLE five

The present embodiment is substantially the same as the fourth embodiment, except that, as shown in fig. 7, two voltage electrodes 3 are respectively connected to two sides of the resistive layer 2, that is, two voltage electrodes 3 are separated on two sides of the resistive layer 1, so as to meet different PCB trace requirements.

The invention embodies a number of methods and approaches to this solution and the foregoing is only a preferred embodiment of the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.

Claims

1. An alloy resistor comprises a resistance layer, current electrodes connected to two 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.

2. The alloy resistor of claim 1, wherein: the current electrode and the voltage electrode which are positioned at the same end of the resistance layer are both connected on the bottom surface of the resistance layer, the width of the current electrode is the same as that of the resistance layer, the end surface of the current electrode and the end surface of the resistance layer are coplanar up and down, the bottom surface of the current electrode is L-shaped, and the bottom surface of the voltage electrode is square and positioned in an L-shaped gap of the current electrode.

3. The alloy resistor of claim 1, wherein: the current electrode and the voltage electrode which are positioned at the same end of the resistance layer are both connected on the end surface of the resistance layer, the width of the current electrode is the same as that 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 positioned in an L-shaped gap of the current electrode.

4. The alloy resistor of claim 1, wherein: the current electrodes and the voltage electrodes are positioned at the same end of the resistance layer, the current electrodes are connected to the bottom surface or the end surface of the resistance layer, the voltage electrodes are connected to the side surface of the resistance layer, and the two voltage electrodes are connected to the same side surface of the resistance layer.

5. The alloy resistor of claim 1, wherein: the current electrodes and the voltage electrodes are positioned at the same end of the resistance layer, the current electrodes are connected to the bottom surface or the end surface of the resistance layer, the voltage electrodes are connected to the side surface of the resistance layer, and the two voltage electrodes are respectively connected to the two side surfaces of the resistance layer.

6. The alloy resistor of claim 3 wherein: the voltage electrodes at two ends of the resistance layer are positioned at the positions where the two ends of the resistance layer are connected with the same side surface of the resistance layer.

7. The alloy resistor of claim 3 wherein: one voltage electrode of the voltage electrodes at two ends of the resistance layer is positioned at the position where one end of the resistance layer is connected with one side surface of the resistance layer; the other voltage electrode is positioned at the position where the other end of the resistance layer is connected with the other side surface of the resistance layer.