A double row lead frame resistor

Abstract

The application provides a double-row lead frame resistance. The double-row lead frame resistance comprises a lead frame, a resistance, and the two ends of the first coil and the second coil are respectively installed with the lead wires; a protective cover; a cooling mechanism, the inside of the protective cover is fixedly connected with the supporting rod, the bottom end of the supporting rod is installed with the air bag; the top end of the supporting rod is internally installed with the fixed block and the fixed frame, the inside of the fixed block is slidably connected with the piston, the inside of the piston and the fixed block is respectively installed with the magnetic ring, the magnetic rings are attracted to each other; the inside of the fixed frame is slidably connected with the sliding rod, the sliding rod is fixedly connected with the piston, the side wall of the sliding rod is sleeved with the spring, and the two ends of the spring are respectively connected with the fixed frame and the piston; a cooling mechanism; a connecting mechanism. The double-row lead frame resistance provided by the application has the advantages of eliminating the self-induction of the coil, reducing the eddy current, and facilitating the dissipation of the heat inside the coil.

Description

Technical Field

[0001] This invention relates to the field of resistor technology, and more particularly to a double-row lead frame resistor. Background Technology

[0002] Coil resistance typically refers to a loop of wire windings. The most common applications of coils include motors, inductors, transformers, and loop antennas. In a circuit, a coil refers to an inductor. An inductor is a series of wires wound together, insulated from each other. The insulating tube can be hollow or contain an iron core or magnetic powder core; it is simply called an inductor.

[0003] In order to regulate the current in the circuit board, coil resistors are usually installed in the circuit board. The coil resistors are usually single-layer coils. When the current flows in the coil resistor, losses will occur due to self-inductance and eddy currents, which will cause the current to be unstable after passing through the resistor. The coil resistor will generate a lot of heat during operation, and excessive heat is not conducive to the operation of electrical components in the circuit board.

[0004] Therefore, it is necessary to provide a new double-row lead frame resistor to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a double-row lead frame resistor that eliminates coil self-inductance, reduces eddy currents, and facilitates the dissipation of heat inside the coil.

[0006] To solve the above-mentioned technical problems, the present invention provides a double-row lead frame resistor comprising: a lead frame; a resistor, the resistor comprising a guide wire, a first coil, and a second coil, multiple guide wires connected to the lead frame, and the guide wires respectively installed at both ends of the first coil and the second coil; a protective cover, the first coil and the second coil being disposed inside the protective cover; a cooling mechanism, the cooling mechanism comprising an air bladder, a support rod, a fixing block, a magnetic ring, a piston, a spring, a fixing frame, and a sliding rod, the support rod being fixedly connected inside the protective cover, the air bladder being installed at the bottom end of the support rod; the fixing block and the fixing frame being installed inside the top end of the support rod, the piston being slidably connected inside the fixing block, the magnetic rings being respectively installed inside the piston and the fixing block, the magnetic rings attracting each other; the sliding rod being slidably connected inside the fixing frame, the sliding rod being fixedly connected to the piston, the spring being fitted onto the side wall of the sliding rod, and the two ends of the spring being respectively connected to the fixing frame and the piston; a cooling mechanism connected to the support rod; and a connecting mechanism installed inside the protective cover, and the connecting mechanism connecting the air bladder and the cooling mechanism.

[0007] Preferably, the wire frame includes an outer bracket, a terminal block, and terminal posts. The terminal posts are installed on the sidewalls of the terminal block, and the guide wires are wound around the sidewalls of the terminal posts. The terminal blocks with arc-shaped sidewalls are symmetrically installed on the sidewalls of the outer bracket.

[0008] Preferably, the first coil and the second coil are interleaved spirally wound, and the winding direction of the first coil is opposite to that of the second coil.

[0009] Preferably, the cooling mechanism includes a cover plate, fins, a fixing rod, and grooves. The top end of the support rod is fixedly connected to the fixing rod, and the top end of the fixing rod is fixedly connected to the cover plate. The side wall of the cover plate is provided with a plurality of grooves, and a plurality of fins are installed on the side wall of the cover plate.

[0010] Preferably, the cover plate has a conical structure, and the top end of the fixing rod extends into the top end of the cover plate, and the height of the fixing rod is less than the height of the cover plate.

[0011] Preferably, the sidewalls of the fins are arc-shaped, and the length of the fins gradually increases from the top of the cover plate to the bottom of the cover plate.

[0012] Preferably, the protective cover includes a cylindrical body, a slot, a base, and a through hole. The slot is symmetrically provided at the bottom end of the cylindrical body, and the inside of the slot is slidably connected to the wiring plate. The bottom end of the cylindrical body engages with the base, and the through hole is uniformly provided on the side wall of the cylindrical body.

[0013] Preferably, the connecting mechanism includes a storage ring, a feeding pipe, a connecting pipe, a fixing plug, a pull rod, and a sliding groove. The storage ring is installed on the top surface of the cylinder, and the top surface of the storage ring is installed and connected to the cover plate. The sliding groove is provided inside the cylinder, and the sliding groove connects the feeding pipe and the connecting pipe. The connecting pipe is connected to the bottom end of the storage ring. The fixing plug is slidably connected to the inside of the sliding groove and the side wall of the connecting pipe, and the fixing plug and the sliding rod are respectively fixedly connected to the side wall of the pull rod.

[0014] Preferably, the sidewall cross-sections of the slide and the fixing plug are "L" shaped, and the slide connects to the top of the support rod.

[0015] Compared with related technologies, the double-row lead frame resistor provided by the present invention has the following beneficial effects:

[0016] This invention provides a double-row lead frame resistor. When current flows inside the lead frame, the current passes through two strands of guide wire, entering the first coil and the second coil respectively. Insulating varnish is applied to the surfaces of the first coil, the second coil, and the guide wire. The first coil and the second coil are non-conductive. The winding directions of the first coil and the second coil are opposite, making the DC resistance and AC resistance symmetrical. When current moves through the first coil and the second coil, the coil self-inductance is eliminated, making them purely resistive, reducing losses, stabilizing current symmetry, improving the skin effect, reducing the internal eddy current field, and improving product efficiency. The first coil and the second coil are respectively installed inside the protective cover, thus forming two resistors inside the protective cover, saving space. The heat generated when the first coil and the second coil are working affects the airbag. The internal refrigerant is heated, causing it to evaporate and generate vapor. The vapor accumulates inside the air bladder and the support rod. As heat enters the air bladder, it cools the first and second coils and causes the air bladder to expand continuously. Simultaneously, it increases the pressure inside the support rod. The vapor gradually increases the pressure exerted on the piston. When the pressure on the piston exceeds the resistance to its upward movement, the piston moves upward inside the fixed block. The magnetic ring on the piston sidewall separates from the magnetic ring on the fixed block sidewall. At this point, the resistance to the piston's movement suddenly decreases, causing the piston and the sliding rod to move upward, compressing the spring and opening the fixed block. This allows the vapor from the support rod to quickly enter the cooling mechanism for cooling. The vapor discharge causes the air bladder to contract, drawing air from around the coil into the coil's interior, increasing airflow and further cooling the coil. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the double-row lead frame resistor provided by the present invention;

[0018] Figure 2 for Figure 1 The diagram shows the resistor structure.

[0019] Figure 3 for Figure 2 The diagram shows the internal structure of the protective cover.

[0020] Figure 4 for Figure 3 The diagram shows an enlarged view of the structure at point A.

[0021] Figure 5 for Figure 2 The protective cover structure shown is a top view.

[0022] Figure 6 for Figure 3The diagram shows an enlarged view of the structure at point B.

[0023] Figure 7 for Figure 2 The diagram shows the structure of the protective cover.

[0024] The diagram is labeled as follows: 1. Wire frame, 11. Outer support, 12. Terminal block, 13. Terminal post, 2. Resistor, 22. Guide wire, 23. First coil, 24. Second coil, 3. Protective cover, 31. Cylinder, 32. Slot, 33. Base, 34. Through hole, 4. Connecting mechanism, 41. Storage ring, 42. Feed pipe, 43. Connecting pipe, 44. Fixing plug, 45. Pull rod, 46. Slide groove, 5. Cooling mechanism, 51. Cover plate, 52. Fin, 53. Fixing rod, 54. Groove, 6. Cooling mechanism, 61. Airbag, 62. Support rod, 63. Fixing block, 64. Magnetic ring, 65. Piston, 66. Spring, 67. Fixing frame, 68. Slide rod. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The double-row lead frame resistor includes: a lead frame 1; a resistor 2, which includes a guide wire 22, a first coil 23, and a second coil 24, with multiple guide wires 22 connected to the lead frame 1, and the guide wires 22 are respectively installed at both ends of the first coil 23 and the second coil 24; a protective cover 3, with the first coil 23 and the second coil 24 disposed inside the protective cover 3; and a cooling mechanism 6, which includes an airbag 61, a support rod 62, a fixing block 63, a magnetic ring 64, a piston 65, a spring 66, a fixing frame 67, and a sliding rod 68. The support rod 62 is fixedly connected inside the protective cover 3, and the airbag 61 is installed at the bottom end of the support rod 62; the top end of the support rod 62 is... The fixing block 63 and the fixing frame 67 are installed in the part. The piston 65 is slidably connected inside the fixing block 63. The magnetic rings 64 are respectively installed inside the piston 65 and the fixing block 63, and the magnetic rings 64 attract each other. The sliding rod 68 is slidably connected inside the fixing frame 67. The sliding rod 68 is fixedly connected to the piston 65. The spring 66 is fitted on the side wall of the sliding rod 68, and the two ends of the spring 66 are respectively connected to the fixing frame 67 and the piston 65. Cooling mechanism 5 is connected to the support rod 62. Connecting mechanism 4 is installed inside the protective cover 3 and connects the airbag 61 and the cooling mechanism 5.

[0027] The wire frame 1 includes an outer bracket 11, a terminal block 12, and terminal posts 13. The terminal posts 13 are installed on the side wall of the terminal block 12, and the guide wire 22 is wound around the side wall of the terminal post 13. The terminal blocks 12 with arc-shaped side walls are symmetrically installed on the side wall of the outer bracket 11. In order to facilitate the outer bracket 11 to improve the support of the terminal block 12, it is convenient for the guide wire 22 to be installed on the side wall of the terminal post 13.

[0028] The first coil 23 and the second coil 24 are interleaved spirally wound, and the winding direction of the first coil 23 is opposite to that of the second coil 24. In order to make the DC resistance and AC resistance symmetrical, when the circuit passes through the first coil and the second coil, the coil self-inductance is eliminated, making it a pure resistor, reducing losses, stabilizing the current symmetry, improving the skin effect, reducing the eddy current electric field generated inside, and improving the working efficiency of the product.

[0029] The cooling mechanism 5 includes a cover plate 51, fins 52, a fixing rod 53, and grooves 54. The top end of the support rod 62 is fixedly connected to the fixing rod 53, and the top end of the fixing rod 53 is fixedly connected to the cover plate 51. The sidewall of the cover plate 51 has multiple grooves 54, and multiple fins 52 are installed on the sidewall of the cover plate 51. The cover plate 51 has a conical structure, and the top end of the fixing rod 53 extends into the top end of the cover plate 51. The height of the fixing rod 53 is less than the height of the cover plate 51. The sidewalls of the fins 52 are arc-shaped to facilitate steam flow. The steam enters the top interior of the cover plate 51 through the fixing rod 53, causing the steam to move from top to bottom inside the cover plate 51. The steam contacts the fins 52, and the length of the fins 52 gradually increases from the top end of the cover plate 51 to the bottom end, continuously increasing the heat exchange area of ​​the steam and slowing down the movement speed of the steam. This helps to dissipate the heat in the steam into the air, causing the steam to condense into water droplets. The side wall of the cover plate 51 is provided with the groove 54, which facilitates the dissipation of heat inside the cover plate 51, thereby quickly reducing the internal temperature of the cover plate 51.

[0030] The protective cover 3 includes a cylindrical body 31, a slot 32, a base 33, and a through hole 34. The slots 32 are symmetrically arranged at the bottom end of the cylindrical body 31, and the interior of the slots 32 is slidably connected to the terminal block 12. The bottom end of the cylindrical body 31 engages with the base 33, and the through holes 34 are evenly arranged on the side wall of the cylindrical body 31. After the guide wire 22 is installed, the cylindrical body 31 is moved, the terminal block 12 slides across the side wall of the slot 32, and then the base 33 engages with the cylindrical body 31, sealing the bottom end of the cylindrical body 31. The outer bracket 12 is bent upward, causing the outer bracket 12 to move upward on the side wall of the slot 32. The top end of the outer bracket 12 is bent and abuts against the cylindrical body 31. The cylindrical body 31 encloses the first coil 23 and the second coil 24 (as shown in the attached diagram). Figure 7 (As shown).

[0031] The connecting mechanism 4 includes a storage ring 41, a feeding pipe 42, a connecting pipe 43, a fixing plug 44, a pull rod 45, and a sliding groove 46. The storage ring 41 is installed on the top surface of the protective cover 3, and the top surface of the storage ring 41 is installed and connected to the cover plate 51. The sliding groove 46 is provided inside the protective cover 3, and the sliding groove 46 connects the feeding pipe 42 and the connecting pipe 43. The connecting pipe 43 is connected to the bottom end of the storage ring 41, and the bottom end of the feeding pipe 42 is connected to the airbag 61. The fixing plug 44 is slidably connected to the inside of the sliding groove 46 and the side wall of the connecting pipe 43. The sidewalls of the pull rod 45 are respectively fixedly connected to the fixing plug 44 and the slide rod 68; the sidewalls of the slide groove 46 and the fixing plug 44 have an "L" shaped structure, and the slide groove 46 is connected to the top of the support rod 62. In order to facilitate the upward movement of the slide rod 68, the slide rod 68 drives the fixing plug 44 to move upward inside the slide groove 46, so that the fixing plug 44 is separated from the connecting pipe 43, and the coolant stored inside the storage ring 41 enters the interior of the airbag 61 again through the connecting pipe 43, the slide groove 46 and the discharge pipe 42.

[0032] The working principle of the double-row lead frame resistor provided by this invention is as follows: First, connect the lead wires 22 to the corresponding terminals 13. Move the cylinder 31, and the terminal block 12 slides across the side wall of the slot 32. Then, engage the base 33 with the cylinder 31 to close the bottom of the cylinder 31. Cut off the outer support 12 at one end of the terminal block 12, and then bend the outer support 12 upwards, causing it to move upwards along the side wall of the slot 32. The top of the outer support 12 bends and abuts against the cylinder 31, and the cylinder 31 encloses the first coil 23 and the second coil 24 (as shown in the attached diagram). Figure 5 and attached Figure 7(As shown). The protective cover 3 is installed in the circuit board. When the current flows inside the terminal block 12, the four terminal blocks 12 correspond one-to-one. Two of the terminal blocks 12 form a resistor with the first coil 23, and the other two terminal blocks 12 form another resistor with the second coil 24. Compared with the prior art, two resistors can be formed in the same space, saving costs and space.After the current enters the interior of the terminal block 12, it flows through the guide wires in the two resistors respectively. When the current flows inside the first coil 23 and the second coil 24, the first coil 23 and the second coil 24 are intertwined, and the winding direction of the first coil 23 is opposite to that of the second coil 24, making the DC resistance symmetrical and the AC resistance symmetrical. When the circuit moves between the first coil and the second coil, the coil self-inductance is eliminated, making it a pure resistor, reducing losses, stabilizing the current symmetry, improving the skin effect, reducing the internal eddy current electric field, and improving the working efficiency of the product. The heat generated heats the refrigerant inside the airbag 61, causing it to evaporate and produce vapor. This vapor accumulates inside the airbag 61 and the support rod 62. As heat enters the airbag 61, it cools the first coil 23 and the second coil 24, causing the airbag 61 to expand continuously. Simultaneously, it increases the pressure inside the support rod 62. The vapor's pressure on the piston 65 gradually increases. When the pressure on the piston 65 exceeds the resistance to its upward movement, the piston 65 moves upward inside the fixing block 63, and the magnetic ring 64 on the sidewall of the piston 65 separates from the magnetic ring 64 on the sidewall of the fixing block 63. At this moment, the resistance to the movement of the piston 65 suddenly decreases, causing the piston 65 and the slide rod 68 to move rapidly upward, compressing the spring 66, opening the fixing block 63, and allowing the vapor from the support rod 62 to enter the top interior of the cover plate 51 through the fixing rod 53. The vapor then moves from top to bottom inside the cover plate 51, contacting the fins 52. The length of the fins 52 gradually increases from the top to the bottom of the cover plate 51, continuously increasing the heat exchange area and slowing down the vapor's movement. This facilitates the dissipation of heat from the vapor into the air, causing the vapor to condense and form water droplets that collect inside the storage ring 41. The side wall of the cover plate 51 is provided with the groove 54 to facilitate the dissipation of heat inside the cover plate 51, thereby quickly reducing the internal temperature of the cover plate 51; the steam discharged from the inside of the support rod 62 causes the air bag 61 to contract, bringing the air around the coil into the inside of the coil, increasing the air flow and cooling the coil again; and when the slide rod 68 moves upward, the slide rod 68 drives the fixing plug 44 to move upward inside the slide groove 46, so that the fixing plug 44 separates from the connecting pipe 43, allowing the coolant stored inside the storage ring 41 to re-enter the inside of the air bag 61 through the connecting pipe 43, the slide groove 46 and the discharge pipe 42.After the steam is discharged from the inside of the support rod 62, the spring 66 pushes the piston 65 to move downward to reset and engage the fixing block 63, and the fixing plug 44 seals the inside of the connecting pipe 43 and the slide groove 46. During this process, most of the heat accumulated inside the airbag 61 enters the inside of the cover plate 51 through the steam, so that the heat is gradually dissipated into the air through the cover plate 51, which facilitates the airbag 61 to continuously absorb the heat dissipated by the coil, which is beneficial to the operation of the coil.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A double-row lead frame resistor, characterized in that, include: Conductor frame (1); The resistor (2) includes a guide wire (22), a first coil (23) and a second coil (24). Multiple guide wires (22) are connected to the lead frame (1), and the guide wires (22) are respectively installed at both ends of the first coil (23) and the second coil (24). A protective cover (3) is provided inside the protective cover (3), wherein the first coil (23) and the second coil (24) are disposed. The cooling mechanism (6) includes an airbag (61), a support rod (62), a fixing block (63), a magnetic ring (64), a piston (65), a spring (66), a fixing frame (67), and a sliding rod (68). The support rod (62) is fixedly connected inside the protective cover (3), and the airbag (61) is installed at the bottom end of the support rod (62). The fixing block (63) and the fixing frame (67) are installed inside the top end of the support rod (62). The piston (65) is slidably connected inside the fixing block (63). The magnetic ring (64) is installed inside the piston (65) and the fixing block (63), and the magnetic ring (64) attracts each other. The sliding rod (68) is slidably connected inside the fixing frame (67), and the sliding rod (68) is fixedly connected to the piston (65). The spring (66) is fitted on the side wall of the sliding rod (68), and the two ends of the spring (66) are connected to the fixing frame (67) and the piston (65), respectively. Cooling mechanism (5), the cooling mechanism (5) is connected to the support rod (62); A connecting mechanism (4) is installed inside the protective cover (3) and connects the airbag (61) and the cooling mechanism (5); the connecting mechanism (4) includes a storage ring (41), a discharge pipe (42), a connecting pipe (43), a fixing plug (44), a pull rod (45), and a slide groove (46). The storage ring (41) is installed on the top surface of the cylinder (31), and the top surface of the storage ring (41) is installed and connected to the cover plate (51); the slide groove (46) is provided inside the cylinder (31). The chute (46) connects the feed pipe (42) and the connecting pipe (43), and the connecting pipe (43) connects to the bottom end of the storage ring (41); the inside of the chute (46) and the side wall of the connecting pipe (43) are slidably connected to the fixing plug (44), and the side wall of the pull rod (45) is fixedly connected to the fixing plug (44) and the slide rod (68) respectively; the side wall cross-section of the chute (46) and the fixing plug (44) is an "L" shaped structure, and the chute (46) connects to the top end of the support rod (62).

2. The double-row lead frame resistor according to claim 1, characterized in that, The wire frame (1) includes an outer bracket (11), a terminal block (12), and terminal posts (13). The terminal posts (13) are installed on the side wall of the terminal block (12), and the guide wire (22) is wound around the side wall of the terminal post (13). The terminal blocks (12) with arc-shaped side walls are symmetrically installed on the side wall of the outer bracket (11).

3. The double-row lead frame resistor according to claim 2, characterized in that, The first coil (23) and the second coil (24) are interleaved spirally wound, and the winding direction of the first coil (23) is opposite to the winding direction of the second coil (24).

4. The double-row lead frame resistor according to claim 2, characterized in that, The cooling mechanism (5) includes a cover plate (51), fins (52), a fixing rod (53) and a groove (54). The top end of the support rod (62) is fixedly connected to the fixing rod (53), and the top end of the fixing rod (53) is fixedly connected to the cover plate (51). The side wall of the cover plate (51) is provided with a plurality of grooves (54), and a plurality of fins (52) are installed on the side wall of the cover plate (51).

5. The double-row lead frame resistor according to claim 4, characterized in that, The cover plate (51) has a conical structure, and the top end of the fixing rod (53) extends into the top end of the cover plate (51). The height of the fixing rod (53) is less than the height of the cover plate (51).

6. The double-row lead frame resistor according to claim 5, characterized in that, The sidewall of the fin (52) is arc-shaped, and the length of the fin (52) gradually increases from the top of the cover plate (51) to the bottom of the cover plate (51).

7. The double-row lead frame resistor according to claim 4, characterized in that, The protective cover (3) includes a cylindrical body (31), a slot (32), a base (33), and a through hole (34). The bottom end of the cylindrical body (31) is symmetrically provided with the slot (32), and the interior of the slot (32) is slidably connected to the wiring board (12). The bottom end of the cylindrical body (31) engages with the base (33), and the side wall of the cylindrical body (31) is uniformly provided with the through hole (34).

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