SMD (Surface Mount Device) winding resistance wire

Abstract

The utility model belongs to the technical field of fuses, and particularly relates to a patch winding resistance wire. The flame-retardant ceramic capacitor comprises a ceramic substrate, an alloy wire, a first electrode cap, a second electrode cap, a flame-retardant shell, a first conductor ring and a second conductor ring, wherein the first electrode cap comprises a first electrode connecting cap and a first electrode fastening cap; and the second electrode connecting cap comprises a second electrode connecting cap and a second electrode fastening cap. According to the SMD winding resistor disclosed by the invention, the conductor ring is mounted on the ceramic substrate, and the electric connection between the electrode cap and the alloy wire is converted into the surface contact between the electrode cap and the conductor ring, so that the contact area of the electric connection is increased, the reliability of the electric connection is improved, and the cost performance of the product is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of fuses, and in particular relates to a chip wound resistor wire. Background Art

[0002] A wound resistance wire typically consists of a ceramic base, positive and negative pole caps, the resistance wire, and a flame-retardant casing. The positive and negative pole caps are placed at either end of the ceramic base, the resistance wire is wound around the base and electrically connected to the positive and negative pole caps at both ends, and the flame-retardant casing is fastened to the outside of the ceramic base and the resistance wire.

[0003] Existing wirewound resistors generally establish electrical connections between the resistor wire and the positive and negative pole caps by pressing and / or spot welding. The contact area of ​​the electrical connection is small (point contact), and poor contact is easily caused when the pole caps rotate. Utility Model Content

[0004] In view of this, the present application provides a patch wound resistor wire to solve all or part of the technical problems described in the background technology part of this application.

[0005] The solutions provided by this application to solve its technical problems are:

[0006] A chip wound resistance wire, comprising a ceramic substrate, an alloy wire, a first electrode cap, a second electrode cap, and a flame retardant shell; characterized in that:

[0007] Also includes a first conductor ring and a second conductor ring;

[0008] The first conductor ring and the second conductor ring are respectively arranged at two ends of the ceramic substrate, the alloy wire is wrapped around the ceramic substrate and the two ends are electrically connected to the first conductor ring and the second conductor ring respectively, and the flame retardant packaging shell is encapsulated outside the ceramic substrate and the alloy wire;

[0009] The first electrode cap and the second electrode cap are respectively arranged at two ends of the ceramic base and can cover the first conductor ring and the second conductor ring.

[0010] Preferably, the first electrode cap includes a first electrode connecting cap and a first electrode fastening cap; the first electrode connecting cap is assembled on the end of the ceramic substrate and can cover the first conductor ring, and the first electrode fastening cap is fastened to the first electrode connecting cap.

[0011] Preferably, the second electrode connection cap includes a second electrode connection cap and a second electrode fastening cap; the second electrode connection cap is assembled on the end of the ceramic substrate and can cover the second conductor ring, and the second electrode fastening cap is fastened to the second electrode connection cap.

[0012] Preferably, the first conductor ring and the second conductor ring are both conductive metal foils mounted on the ceramic substrate.

[0013] Preferably, the locations on the ceramic substrate for mounting the first conductor ring and the second conductor ring are both provided with foil grooves.

[0014] Preferably, the first electrode cap and the second electrode cap are both provided with welding spots, which are used to strengthen the connection between the first electrode cap, the second electrode cap and the first conductor ring, the second conductor ring.

[0015] Preferably, the ceramic substrate is a cylindrical structure, and the flame retardant shell is a cylindrical structure.

[0016] Beneficial technical effects:

[0017] The chip wound resistor disclosed in the present application converts the electrical connection between the first and second electrode caps and the alloy wire into surface contact between the first and second electrode caps and the first and second conductor rings by mounting the first and second conductor rings on the ceramic substrate, thereby increasing the contact area of ​​the electrical connection part and improving the reliability of the electrical connection; and no poor contact will occur when the first and second electrode caps rotate.

[0018] The technical solutions and technical effects of this application are described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : Front view of chip wire wound resistor;

[0020] Figure 2 : Side view of chip wire wound resistor wire;

[0021] Figure 3 : Exploded diagram of the chip wire wound resistor structure;

[0022] Figure 4 : Power reduction curve;

[0023] Figure 5 : Shock resistance test circuit;

[0024] Icon Description:

[0025] 10-ceramic substrate, 20-alloy wire, 30-first electrode cap, 40-second electrode cap, 50-flame retardant shell, 60-first conductor ring, 70-second conductor ring, 80-welding point;

[0026] 310-first electrode connecting cap, 320-second electrode fastening cap;

[0027] 410 - first electrode connecting cap, 420 - second electrode fastening cap. DETAILED DESCRIPTION

[0028] See also Figures 1 to 3The patch wound resistance wire provided in this application includes a ceramic substrate 10, an alloy wire 20, a first electrode cap 30, a second electrode cap 40, a flame retardant shell 50, a first conductor ring 60, and a second conductor ring 70; wherein: the first electrode cap 30 includes a first electrode connecting cap 310 and a first electrode fastening cap 320; the second electrode connecting cap 40 includes a second electrode connecting cap 410 and a second electrode fastening cap 420.

[0029] The first conductor ring 60 and the second conductor ring 70 are respectively mounted on the two ends of the ceramic base 10, the alloy wire 20 is wrapped around the ceramic base 10, and the two ends of the alloy wire 20 are respectively electrically connected to the first conductor ring 60 and the second conductor ring 70, and the flame retardant packaging shell 50 is encapsulated on the outside of the ceramic base 10 and the alloy wire 20.

[0030] The first electrode connection cap 310 is assembled at one end of the ceramic base 10 and can cover the first conductor ring 60 . The first electrode fastening cap 320 is fastened to the first electrode connection cap 310 .

[0031] The second electrode connection cap 410 is assembled at the other end of the ceramic base 10 and can cover the second conductor ring 70 . The second electrode fastening cap 420 is fastened to the second electrode connection cap 410 .

[0032] Welding points 80 are provided on both the first electrode cap 30 and the second electrode cap 40 .

[0033] The welding points 80 are used to strengthen the connection between the first electrode cap 30 , the second electrode cap 40 and the first conductor ring 60 , the second conductor ring 70 .

[0034] Material description: The first electrode cap 30 and the second electrode cap 40 can be tinned iron caps, the flame retardant shell 50 is a flame retardant coating layer, and the first conductor ring 60 and the second conductor ring 70 are both conductive metal foils mounted on the ceramic substrate 10.

[0035] Technical characteristics test:

[0036] 1. Power reduction curve: The rated power is the maximum value for continuous operation at 70℃. Figure 4 The power reduction curve in the figure reduces power consumption.

[0037] 2. Impact resistance: according to Figure 5 The test circuit shown is used to test the impact resistance of chip wound resistors. Switch K1 is closed and switch K2 is opened. K1 is repeatedly switched on and off 100 times according to the 2S on and 2S off requirement. The test resistor does not open and has no abnormalities.

[0038] The chip wound resistor disclosed in the present application converts the electrical connection between the electrode cap and the alloy wire into surface contact between the electrode cap and the conductor ring by mounting a conductor ring on a ceramic substrate, thereby increasing the contact area of ​​the electrical connection part, improving the reliability of the electrical connection, and improving the cost-effectiveness of the product.

[0039] The above describes the technical solution and technical effects of the present application in detail in combination with the drawings and specific embodiments of the specification. It should be noted that technicians in this field can also develop other embodiments on this basis; any simple deformation and equivalent substitution that does not deviate from the innovative concept of the present application are covered by the present application and fall within the scope of protection of this patent.

Claims

1. A patch wound resistance wire, comprising a ceramic substrate (10), an alloy wire (20), a first electrode cap (30), a second electrode cap (40), and a flame retardant shell (50); characterized in that: It also includes a first conductor ring (60) and a second conductor ring (70); The first conductor ring (60) and the second conductor ring (70) are respectively arranged at two ends of the ceramic base (10); the alloy wire (20) is wrapped around the ceramic base (10) and its two ends are respectively electrically connected to the first conductor ring (60) and the second conductor ring (70); the flame retardant packaging shell (50) is encapsulated outside the ceramic base (10) and the alloy wire (20); The first electrode cap (30) and the second electrode cap (40) are respectively arranged at two ends of the ceramic base (10) and are capable of covering the first conductor ring (60) and the second conductor ring (70).

2. The chip wound resistance wire according to claim 1, characterized in that: The first electrode cap (30) comprises a first electrode connecting cap (310) and a first electrode fastening cap (320); The first electrode connection cap (310) is assembled on the end of the ceramic base (10) and is capable of covering the first conductor ring (60), and the first electrode fastening cap (320) is fastened to the first electrode connection cap (310).

3. The chip wound resistance wire according to claim 1, characterized in that: The second electrode connection cap (40) comprises a second electrode connection cap (410) and a second electrode fastening cap (420); The second electrode connection cap (410) is assembled on the end of the ceramic base (10) and is capable of covering the second conductor ring (70), and the second electrode fastening cap (420) is fastened to the second electrode connection cap (410).

4. The chip wound resistance wire according to claim 1, characterized in that: The first conductor ring (60) and the second conductor ring (70) are both conductive metal foils mounted on the ceramic substrate (10).

5. The chip wound resistance wire according to claim 4, characterized in that: The portions of the ceramic base (10) used for mounting the first conductor ring (60) and the second conductor ring (70) are both provided with foil grooves.

6. The chip wire-wound resistance wire according to claim 1, characterized in that: Welding points (80) are provided on both the first electrode cap (30) and the second electrode cap (40).

7. The chip wire wound resistance wire according to claim 1, characterized in that: The ceramic base (10) is a cylindrical structure, and the flame retardant shell (50) is a cylindrical structure.

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