A chip type winding high frequency inductor

Abstract

The application discloses a sheet type winding high-frequency inductor, and relates to the technical field of inductors, which comprises a magnetic core and a coil wound on the magnetic core, and connecting seats are fixedly connected to the two ends of the magnetic core; welding blocks are fixed to the bottoms of the connecting seats; the two ends of the coil are fixedly connected with corresponding welding blocks; suction members are slidably arranged in the connecting seats; and damping members are arranged on the connecting seats and can slide. The extrusion ball and the damping member are arranged, so that the extrusion ball can be used for multi-stage damping when the shell is subjected to strong impact; when the extrusion ball is extruded, the contact area between the extrusion ball and the connecting seat and the contact area between the extrusion ball and the shell are increased, the gas distribution area in the extrusion ball is wider, the damping performance is further improved, and the technical problem of weak impact resistance when the existing inductor is hard connected with a board circuit is solved.

Description

Technical Field

[0001] This invention relates to the field of inductor technology, and more particularly to a chip wire-wound high-frequency inductor. Background Technology

[0002] Wire-wound chip inductors are a type of chip inductor suitable for high-frequency circuits. They are mainly formed by winding wires around a magnetic core to create a coil. The magnetic core is usually made of magnetic materials such as ferrite, silicon steel sheet, and nickel-zinc ferrite. These materials can enhance the magnetic field generated by the coil, thereby improving the performance of the inductor. Wire-wound chip inductors have good solderability and heat resistance, making them suitable for general soldering and reflow soldering.

[0003] When mounting inductors onto circuit boards using a pick-and-place machine, solder paste or solder is first heated on the pads of the circuit board. Then, the solder terminals of the inductor are placed against the pads. However, the contact area between the solder terminals and the solder paste or solder on the pads is small, resulting in a weak connection between the inductor terminals and the circuit board pads. Therefore, it is necessary to blow the solder liquid little by little to the bottom of the inductor or move it through other means to ensure the stability of the solder joint. This not only increases the difficulty and complexity of soldering but also increases the labor intensity of workers, is time-consuming and labor-intensive, and results in low processing efficiency. In large-scale manufacturing, this can easily lead to delays in the production schedule.

[0004] In practical use, it was found that although the suction component and suction chamber work together to suction the molten solder, allowing it to flow to the bottom of the solder block and make close contact with the uneven bottom surface, the damping component cannot push the molten solder. As a result, the suction component does a lot of useless work during suction, first drawing out a large amount of air, and only after reaching a certain distance from the molten solder can it actually suction it. Therefore, some molten solder cannot be drawn to the bottom of the solder block, resulting in a loose connection.

[0005] After assembly, if the coil is not properly secured, it will move on the magnetic core and wear down the outer insulation layer, potentially damaging the coil. Furthermore, during assembly, the end of the existing inductor furthest from the circuit board is usually rigidly connected to the casing. When subjected to strong vibrations or impacts to the casing, the lack of cushioning and shock absorption can cause the inductor to move or even fall off the circuit board, or cause cracks at the solder joint between the inductor and the circuit board, thus damaging the machine. Summary of the Invention

[0006] The purpose of this invention is to provide a chip-type wire-wound high-frequency inductor to solve the technical problem mentioned in the background art of weak shock resistance when existing inductors are rigidly connected to the circuit board.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a chip-wound high-frequency inductor, comprising a magnetic core and a coil wound thereon, with connecting seats fixedly connected to both ends of the magnetic core, and a solder block fixed to the bottom of each connecting seat. The two ends of the coil are respectively fixedly connected to the corresponding solder blocks. A suction component is slidably disposed inside each connecting seat, and a slidable shock absorber is disposed on each connecting seat. A hollow extrusion ball is fixedly connected to the top of the connecting seat. When the connecting seat is connected to the circuit board, the suction component draws the solder liquid to the solder block, so that the solder liquid and the solder block are in full contact. When the suction component draws the solder liquid, it can cause the shock absorber to move to the bottom, so that the shock absorber can wrap and protect the solder joint.

[0008] Preferably, each of the connecting seats is provided with two pneumatic telescopic rods, and the two corresponding pneumatic telescopic rods are connected to the interior of the corresponding extrusion ball through a connecting pipe, and the extended end of the pneumatic telescopic rod is fixedly connected to the corresponding shock absorber.

[0009] Preferably, each of the shock absorbers is fixedly connected to a collection component on its bottom outer wall. When the collection component comes into contact with the welding liquid, it pushes the welding liquid toward the welding block.

[0010] Preferably, each of the connecting seats has a suction cavity, the suction component is slidably disposed in the suction cavity, the welding block has multiple suction grooves, and the suction component can extend out of the corresponding suction grooves.

[0011] Preferably, each of the suction chambers is connected to the interior of the corresponding extrusion ball via a corresponding connecting tube.

[0012] Preferably, the two connecting seats are slidably connected to a clamping member at their opposite ends, and a contact member is fixedly connected to the side of the clamping member near the coil. The inner wall of the contact member is provided with a plurality of limiting grooves that are consistent with the shape of the coil, and the coil can be inserted into the limiting grooves.

[0013] Preferably, each of the connecting seats is provided with a pneumatic groove, and each of the pneumatic grooves is provided with a slidable extrusion block.

[0014] Preferably, the side of the extrusion block closest to the clamping member is inclined, and the inclined part of the extrusion block is slidably connected to the clamping member.

[0015] Preferably, each of the pneumatic grooves is connected to the interior of the corresponding extrusion ball through a vent pipe, and an elastic element is provided between the end of the extrusion block away from the clamping member and the pneumatic groove.

[0016] Preferably, a protective component is provided at the position where the coil is fixed to the corresponding solder block, and the suction component is slidably connected to the protective component.

[0017] The beneficial effects of this invention are:

[0018] 1. Through the coordinated design of suction components, suction chambers, and shock absorbers, the solder molten metal is moved towards the solder block during welding, resulting in a tight and secure weld and preventing weak welds. Simultaneously, the shock absorbers move towards the welding area to prevent solder molten metal overflow, which could lead to insufficient contact between the solder molten metal and the solder block, resulting in a weak weld. This achieves a better welding effect. Furthermore, the fixed connection between the collection component and the shock absorbers creates a sealed space between the collection component and the circuit board during solder molten metal suction. This allows the suction component and suction tank to only draw in the gas and solder molten metal within this space, enabling more solder molten metal to flow towards the bottom of the solder block. This ensures a tight connection between the inductor and the circuit board and guarantees the stability of the weld.

[0019] 2. The clamping components, contact components, and limiting grooves can restrict the coil, thereby preventing wear on the outer insulation layer when the coil moves. The extrusion ball and shock absorber can be used for multi-stage shock absorption when the housing is subjected to strong impact. First, the shock absorber can dampen the welded joints. The extrusion ball can prevent direct damage to the rigid connection between the housing and the inductor when subjected to strong impact. At the same time, the roughness of the outer wall of the extrusion ball can prevent relative movement between the inductor and the housing. When the extrusion ball is squeezed, the contact area between the extrusion ball and the connector and between the extrusion ball and the housing is increased, further improving the positional stability of the inductor. At the same time, the gas distribution area inside the extrusion ball is wider, further improving the shock absorption performance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the full-section front view structure of the present invention.

[0022] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle.

[0023] Figure 4 This is a schematic diagram showing the connection relationship between the extrusion ball and the connecting tube of the present invention.

[0024] Figure 5 This is an exploded view of the welding block, suction component, and protective component in this invention.

[0025] Figure 6 This is an exploded view of the contact element and clamping element in this invention.

[0026] The attached figures are labeled as follows: 1. Magnetic core; 2. Coil; 3. Connecting seat; 301. Weld block; 302. Shock absorber; 303. Extrusion ball; 304. Pneumatic telescopic rod; 305. Connecting pipe; 306. Collecting component;

[0027] 4. Suction component; 401. Suction chamber; 402. Suction groove; 403. Connecting pipe; 404. Protective component; 5. Clamping component; 501. Contact component; 502. Restricting groove; 503. Pneumatic groove; 504. Extrusion block; 505. Ventilation pipe; 506. Elastic component. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] Wire-wound chip inductors are a type of chip inductor suitable for high-frequency circuits. They are mainly formed by winding wires on a magnetic core 1 to form a coil 2. The magnetic core 1 is usually made of magnetic materials such as ferrite, silicon steel sheet, and nickel-zinc ferrite. These materials can enhance the magnetic field generated by the coil 2, thereby improving the performance of the inductor. Wire-wound chip inductors have good solderability and heat resistance, and are suitable for general soldering and reflow soldering.

[0031] When mounting inductors onto circuit boards using a pick-and-place machine, solder paste or solder is first heated on the pads of the circuit board. Then, the solder terminals of the inductor are placed against the pads. However, the contact area between the solder terminals and the solder paste or solder on the pads is small, resulting in a weak connection between the inductor terminals and the circuit board pads. Therefore, it is necessary to blow the solder liquid little by little to the bottom of the inductor or move it through other means to ensure the stability of the solder joint. This not only increases the difficulty and complexity of soldering but also increases the labor intensity of workers, is time-consuming and labor-intensive, and results in low processing efficiency. In large-scale manufacturing, this can easily lead to delays in the production schedule.

[0032] To resolve the above technical issues, please refer to Figures 1 to 6As shown, an embodiment of the present invention discloses a chip-wound high-frequency inductor, comprising a magnetic core 1 and a coil 2 wound thereon. Both ends of the magnetic core 1 are fixedly connected to connecting seats 3. Each connecting seat 3 has a solder block 301 fixed to its bottom. Both ends of the coil 2 are respectively fixedly connected to the corresponding solder block 301. Each connecting seat 3 has a sliding suction member 4, and each connecting seat 3 has a sliding shock absorber 302. A hollow extrusion ball 303 is fixedly connected to the top of each connecting seat 3. When the connecting seat 3 is connected to a circuit board, the suction member 4 draws the solder liquid to the solder block 301, ensuring full contact between the solder liquid and the solder block 301. When the suction member 4 draws the solder liquid, it causes the shock absorber 302 to move downwards, thus protecting the solder joint. Each connecting seat 3 is provided with two pneumatic telescopic rods 304. The two pneumatic telescopic rods 304 are connected to the interior of the corresponding extrusion ball 303 through a connecting pipe 305. The extended end of the pneumatic telescopic rod 304 is fixedly connected to the corresponding shock absorber 302. Each connecting seat 3 is provided with a suction chamber 401. The suction member 4 is slidably disposed in the suction chamber 401. The welding block 301 is provided with multiple suction grooves 402. The suction member 4 can extend out of the corresponding suction groove 402. Each suction chamber 401 is connected to the interior of the corresponding extrusion ball 303 through a corresponding connecting pipe 403. The coil 2 and the corresponding welding block 301 are fixedly provided with a protective member 404. The suction member 4 and the protective member 404 are slidably connected.

[0033] In use, the solder on the circuit board is first melted. Then, the solder block 301 of the inductor is moved toward the solder. The suction member 4 first comes into contact with the solder liquid. After contacting the solder liquid, the suction member 4 begins to move away from the solder liquid in the suction chamber 401, so that the suction member 4 moves relative to the connector 3. This makes the part of the suction chamber 401 at the bottom of the suction member 4 in a negative pressure state. The solder liquid is sucked by the solder block 301 and the suction groove 402. Since there is air between the solder block 301 and the circuit board, the air is first sucked out. The suction member 4 is provided with multiple contact rods corresponding to the suction groove 402. The diameter of the contact rods is smaller than the diameter of the suction groove 402 to prevent the solder liquid from being sucked to a high position and not being able to make close contact with the bottom of the solder block 301.

[0034] After the suction component 4 and the connecting seat 3 move a certain distance relative to each other, the portion of the suction chamber 401 located at the bottom of the suction component 4 begins to draw the solder molten metal through the suction groove 402, drawing the solder molten metal to the bottom position of the solder block 301, thereby causing the solder molten metal to accumulate in the bottom area of ​​the solder block 301, as shown in the attached drawings of the instruction manual. Figure 5 As can be seen, the bottom of the welding block 301 has an irregular uneven distribution, which allows the welding liquid to flow fully at the bottom of the welding block 301, thereby ensuring that the welding liquid and the welding block 301 are in full contact, making the weld stable and firm.

[0035] While the suction component 4 moves relative to the connecting seat 3, the suction component 4 squeezes the gas in the upper part of the suction chamber 401, so that the gas in the upper part of the suction chamber 401 is discharged into the pneumatic telescopic rod 304 after passing through the connecting pipe 403, the squeezing ball 303 and the connecting pipe 305. This causes the pneumatic telescopic rod 304 to extend and drive the corresponding shock absorber 302 to move to the bottom. This allows the shock absorber 302 to wrap and protect the weld joint, preventing the weld from overflowing and causing insufficient contact between the weld and the weld block 301, resulting in an unstable connection. The shock absorber 302 is made of high-temperature resistant flexible material and will not fail under the action of high-temperature weld. The pneumatic telescopic rod 304 is existing technology and will not be described in detail here.

[0036] During the movement of the suction component 4, the connection between the protective component 404 and the suction component 4 can ensure sealing and prevent the coil 2 from being worn within the range of movement of the suction component 4. At the same time, the coil 2 is made of enameled wire and other outer wall insulation materials, so there will be no leakage. The specific technology will not be described in detail here.

[0037] By cooperating with the suction component 4, suction chamber 401, and shock absorber 302, the welding liquid can be moved towards the welding block 301 during welding, thereby making the weld tight and firm and preventing the weld from being weak. At the same time as moving the welding liquid, the shock absorber 302 moves towards the welding point to prevent the welding liquid from overflowing and causing insufficient contact between the welding liquid and the welding block 301, resulting in a weak weld. This achieves a better welding effect.

[0038] Example 2

[0039] In actual use, it was found that although the suction component 4 and the suction chamber 401 cooperate to suction the molten solder, thereby causing the molten solder to flow to the bottom of the welding block 301 and make close contact with the uneven bottom of the welding block 301, the damping component 302 cannot push the molten solder. When the suction component 4 suctions, it will do a lot of useless work, first sucking out a large amount of air, and only after a certain distance from the molten solder can it be suctioned. Therefore, some molten solder cannot be sucked to the bottom of the welding block 301, resulting in the connection still being unstable.

[0040] To solve the above technical problems, based on the above embodiments, please refer to... Figures 1 to 6 As shown, the technical solution adopted includes a shock absorber 302, and a collector 306 is fixedly connected to the bottom outer wall of each shock absorber 302. When the collector 306 comes into contact with the welding liquid, it pushes the welding liquid to move towards the welding block 301.

[0041] During use, as the shock absorber 302 moves towards the welding point to prevent solder molten metal from overflowing, the shock absorber 302 also drives the collecting component 306 to move towards the welding point. The collecting component 306 contacts the circuit board before the shock absorber 302. The collecting component 306 is made of a flexible, high-temperature resistant material and will not fail under the action of high-temperature solder molten metal. The collecting component 306 deforms and pushes the solder molten metal to the bottom of the solder block 301. At the same time, a relatively sealed space is formed between the collecting component 306, the circuit board, and the connector 3, etc., so that the suction component 4 only extracts from this space, thereby reducing the probability of the suction component 4 doing useless work and increasing the probability that the solder molten metal is moved to the bottom of the solder block 301, thus ensuring full contact between the solder molten metal and the bottom of the solder block 301. After the shock absorber 302 contacts the circuit board, the solder molten metal is completely extracted to the bottom of the solder block 301.

[0042] Since the bottom of solder block 301 is uneven, please refer to the attached diagram in the instruction manual for details. Figure 5 As shown, the bottom of the welding block 301 has multiple dovetail grooves arranged in a longitudinal and transverse pattern, which creates an uneven bottom surface. This allows the welding liquid to fit into the dovetail grooves on the welding block 301 after cooling, thereby improving the connection stability and reliability between the welding liquid and the welding block 301.

[0043] By fixing the collection component 306 to the shock absorber 302, a sealed space can be formed between the collection component 306 and the circuit board when the solder is sucked up. This allows the suction component 4 and the suction groove 402 to only suck up the gas and solder in this space, so that more solder can flow to the bottom of the solder block 301, thereby achieving a tight connection between the inductor and the circuit board and ensuring the stability of the solder joint.

[0044] Example 3

[0045] Although the above embodiments solve the problem of close contact between the solder and the solder block 301, they cannot prevent the coil 2 from wearing on the magnetic core 1. After assembly, the coil 2 lacks fixation. After moving on the magnetic core 1, it will wear down the outer insulation layer. The technology of setting an insulation layer on the outside of the coil 2 is existing technology, which will cause damage to the coil 2. In addition, during assembly, the end of the existing inductor away from the circuit board is usually fixed to the shell by a rigid connection. When subjected to strong vibration or the shell is impacted, due to the lack of buffer and shock absorption components, the inductor is easy to move on the circuit board or even fall off, which will cause damage to the circuit board.

[0046] To solve the above technical problems, based on the above embodiments, please refer to... Figures 1 to 6As shown, the technical solution includes a connecting seat 3. The opposite ends of two connecting seats 3 are slidably connected to a clamping member 5. A contact member 501 is fixedly connected to the side of the clamping member 5 near the coil 2. Multiple limiting grooves 502 with the same shape as the coil 2 are opened on the inner wall of the contact member 501. The coil 2 is spirally distributed and can be inserted into the limiting grooves 502. Each connecting seat 3 is provided with a pneumatic groove 503. A pressing block 504 is slidably provided in each pneumatic groove 503. The side of the pressing block 504 near the clamping member 5 is inclined. The inclined part of the pressing block 504 is slidably connected to the clamping member 5. Each pneumatic groove 503 is connected to the interior of the corresponding pressing ball 303 through a vent pipe 505. An elastic member 506 is provided between the end of the pressing block 504 away from the clamping member 5 and the pneumatic groove 503.

[0047] In practical use, after the inductor and circuit board are soldered together, when it needs to be installed into the housing, first fix the end of the circuit board away from the inductor to the housing and other components. After fixing, use another housing or component to cover the end of the circuit board near the inductor. When covering, the subsequently installed housing or component squeezes the compression ball 303 on the connecting seat 3. Since the compression ball 303 is made of elastic high-temperature resistant material, the gas inside the compression ball 303 begins to be discharged into the pneumatic groove 503 through the vent pipe 505, causing the air pressure in the pneumatic groove 503 to increase. The compression block 504 moves towards the clamping member 5 and pushes the clamping member 5 downward. At the same time, the elastic member 506 is stretched. The clamping member 5 and the connecting seat 3 are connected by a keyway sliding method (not shown in the figure). This causes the clamping member 5 to drive the contact member 501 and the limiting groove 502 to move towards the coil 2, so that the coil 2 is located in the corresponding limiting groove 502. The contact member 501 is made of flexible material, and the clamping member 5 is made of rigid material, which facilitates the movement of the clamping member 5, avoids uneven movement on both sides, and fixes the coil 2.

[0048] Because of the elastic element 506, when the suction element 4 squeezes the suction chamber 401, the gas inside is effectively discharged into the pneumatic telescopic rod 304. Then, after the pneumatic telescopic rod 304 extends, it can act on the pneumatic groove 503 and the squeezing block 504.

[0049] When the housing contacts the extrusion ball 303, the extrusion ball 303 deforms. The surface of the extrusion ball 303 is roughened to form a damping connection with the housing. This delays or even prevents changes in the position between the inductor and the circuit board when impacted, preventing cracks or splits at the solder joint. Simultaneously, the extrusion ball 303, being made of elastic material, acts as a buffer between the housing, circuit board, and inductor when subjected to strong impacts. The shock absorber 302 also acts as a buffer between the circuit board and inductor. Upon impact, the extrusion ball 303 deforms, significantly reducing the impact force. When vibration occurs at the solder joint between the inductor and the circuit board, it transmits the vibration to the shock absorber 302 and the extrusion ball 303, thereby reducing damage to the solder joint between the inductor and the circuit board from vibration and impact. It also prevents a rigid connection between the housing and the inductor at the end furthest from the circuit board, thus improving the stability and shock resistance of the inductor and preventing damage to the circuit board and inductor.

[0050] The clamping member 5, contact member 501, and limiting groove 502 can restrict the coil 2, thereby preventing the coil 2 from shaking or moving slightly when the circuit board or the machine mounting the circuit board moves, which would cause the insulation layer on the outer wall of the coil 2 to gradually wear down. The extrusion ball 303 and shock absorber 302 can be used as multi-stage shock absorption when the housing is subjected to strong impact. First, the shock absorber 302 can absorb the vibration at the welded joint. The extrusion ball 303 can prevent the rigid connection between the housing and the inductor from being directly damaged when impacted. At the same time, the rough setting of the outer wall of the extrusion ball 303 can prevent relative movement between the inductor and the housing. When the extrusion ball 303 is squeezed, the contact area between the extrusion ball 303 and the connecting seat 3 and between the extrusion ball 303 and the housing is increased, which further improves the positional stability of the inductor. At the same time, it makes the gas distribution area inside the extrusion ball 303 wider, which further improves the shock absorption performance.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A chip-wound high-frequency inductor, comprising a magnetic core and a coil wound thereon, wherein both ends of the magnetic core are fixedly connected to connectors, characterized in that, Each of the connectors has a solder block fixed at its bottom. The two ends of the coil are respectively fixedly connected to the corresponding solder blocks. Each connector has a suction component that slides inside. Each connector has a shock absorber that can slide. A hollow extrusion ball is fixedly connected to the top of the connector. When the connector is connected to the circuit board, the suction component draws the solder liquid to the solder block, so that the solder liquid and the solder block are in full contact. When the suction component draws the solder liquid, it can make the shock absorber move to the bottom, so that the shock absorber can wrap and protect the welding area. Each of the connecting seats is provided with two pneumatic telescopic rods. The two pneumatic telescopic rods are connected to the interior of the corresponding extrusion ball through a connecting pipe. The extended end of the pneumatic telescopic rod is fixedly connected to the corresponding shock absorber. Each of the connecting seats has a suction cavity. The opposite ends of the two connecting seats are slidably connected to a clamping member. A contact member is fixedly connected to the side of the clamping member near the coil. Multiple limiting grooves with the same shape as the coil are opened on the inner wall of the contact member. The coil is spirally distributed and can be inserted into the limiting groove. Each of the connecting seats is provided with a pneumatic groove, and each of the pneumatic grooves is provided with a slidable extrusion block. The side of the extrusion block near the clamping member is inclined, and the inclined part of the extrusion block is slidably connected to the clamping member. Each of the pneumatic grooves is connected to the interior of the corresponding extrusion ball through a vent pipe. An elastic element is provided between the end of the extrusion block away from the clamping member and the pneumatic groove. The elastic element enables the gas inside the suction chamber to be effectively discharged into the pneumatic telescopic rod when the suction member extrudes the suction chamber, so that it can act on the pneumatic groove and the extrusion block after the pneumatic telescopic rod is extended.

2. The chip-wound high-frequency inductor according to claim 1, characterized in that, Each of the shock absorbers is fixedly connected to a collection component on its bottom outer wall. When the collection component comes into contact with the welding liquid, it pushes the welding liquid toward the welding block.

3. A chip-wound high-frequency inductor according to claim 2, characterized in that, The suction component is slidably disposed within the suction chamber, and the welding block has multiple suction grooves, with the suction component able to extend out of the corresponding suction grooves.

4. A chip-wound high-frequency inductor according to claim 3, characterized in that, Each of the suction chambers is connected to the interior of the corresponding extrusion ball via a corresponding connecting tube.

5. A chip-wound high-frequency inductor according to claim 4, characterized in that, The coil and the corresponding welding block are fixed with protective components, and the suction component is slidably connected to the protective components.

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