Low-loss planar inductor

Abstract

The utility model discloses a low-loss planar inductor, which comprises a circuit board main body and an inductor main body clamped and installed at the upper end of the circuit board main body, a fixing piece is fixedly installed inside the circuit board main body, a heat dissipation plate is fixedly installed at the lower end of the fixing piece, and a butt joint is fixedly installed at the lower end of the inductor main body. According to the low-loss planar inductor, in the installation process of the inductor body, the two sets of pushing plates and the limiting elastic pieces can move relatively, so that the limiting elastic pieces are located at the upper end of the inductor body and limit the inductor body, and installation of the inductor body is rapidly completed; when the inductor is disassembled, the two groups of pushing plates are far away from each other to enable the moving cylinder to move upwards, and the contracted supporting spring in the moving cylinder expands, so that the inductor main body is pushed to move upwards through the contact cylinder and is separated from the circuit board main body, the quick disassembly process of the inductor is completed, and the disassembly convenience of the inductor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of planar inductors, in particular to a low-loss planar inductor. Background Art

[0002] In the development of CMOS radio frequency integrated circuits (RFIC), the most urgent and difficult thing is to develop high-performance new devices and new unit circuits, which are the basis for realizing monolithic CMOS integrated RF front-end. Planar inductors, as key components in RFIC, are the most difficult components to design and master in the circuit. Their performance parameters directly affect the performance of RFIC. On-chip inductors can realize the integration of inductors in RFIC.

[0003] On-chip planar inductors are mostly made by winding metal films on silicon substrates. Compared with traditional wire-wound inductors, on-chip planar inductors have the advantages of low cost, easy integration, low noise and low power consumption. More importantly, they are compatible with today's CMOS process. In recent years, with the development of mobile communications towards miniaturization and low power consumption, more and more research has been conducted on the production of high-quality on-chip passive devices compatible with CMOS processes. However, the existing low-loss planar inductors still have certain defects in use, such as;

[0004] The utility model announcement number CN215007871U discloses a low-loss planar inductor, which abandons many defects brought by the traditional wide-side structure frame and cleverly designs a narrow-side structure frame. Compared with the wide-side structure, the utility model has a smaller weight and a smaller load on the circuit board. At the same time, the cover plate of the utility model adopts a mesh plate structure composed of a plurality of air-permeable hole structures arranged in a rectangular array, thereby enhancing the heat dissipation performance of the utility model, and the rectangular holes opened on the support component can reduce the contact area between the support component and the inductor body, thereby further optimizing the heat dissipation effect of the utility model, and then optimizing the actual use effect of the utility model;

[0005] In the above document, the planar inductor dissipates heat through a mesh structure, and before the planar inductor is used, it needs to be installed on the outside of a circuit board for use, and the outside of the planar inductor is generally smooth and flat. During the installation process, the planar inductor is generally fixed to the circuit board by gluing, and this installation method requires manual control to ensure the accuracy of the installation of the planar inductor. At the same time, it is difficult to separate the planar inductor from the circuit board after gluing, and it is difficult to quickly replace the planar inductor after it is damaged, which brings inconvenience to the disassembly and assembly of the planar inductor.

[0006] In view of the above problems, it is urgent to carry out innovative design based on the original inductor structure. Utility Model Content

[0007] The purpose of the utility model is to provide a low-loss planar inductor to solve the problem that the existing planar inductor installation method proposed in the above background technology requires manual control to ensure the accuracy of the planar inductor installation, and it is difficult to separate the planar inductor from the circuit board after gluing and fixing, and it is difficult to quickly replace the planar inductor after it is damaged, which brings inconvenience to the disassembly and assembly of the planar inductor.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-loss planar inductor, comprising a circuit board body and an inductor body mounted on the upper end of the circuit board body;

[0009] A fixing piece is fixedly installed inside the circuit board body, and a heat sink is fixedly installed at the lower end of the fixing piece, and heat sink grooves are evenly spaced inside the heat sink, and a docking joint is fixedly installed at the lower end of the inductor body;

[0010] A limiting structure is arranged inside the circuit board body, and the limiting structure can achieve the effect of rapid disassembly and assembly of the inductor body inside the circuit board body.

[0011] Preferably, a contact cylinder, a moving cylinder and a support spring are arranged inside the limiting structure, the contact cylinder is slidably installed inside the fixing part, and the moving cylinder is slidably installed inside the contact cylinder, and the moving cylinder is located at the upper end of the heat dissipation plate, and support springs are arranged inside the contact cylinder and the moving cylinder.

[0012] Preferably, a traction rope and a fixed plate are provided inside the limiting structure, the traction rope is fixedly installed on the lower end of the moving cylinder, the fixed plate is fixedly installed on the upper end of the circuit board body, and a sliding plate is slidably installed inside the fixed plate, and the lower end of the sliding plate is fixedly connected to the traction rope.

[0013] Preferably, a push plate and a limit spring are provided inside the limiting structure, the push plate is fixedly mounted on the upper end of the sliding plate, the limit spring is mounted on the side of the upper end of the push plate close to the inductor body, and two groups of limit springs and push plates are symmetrically arranged about the vertical center axis of the inductor body, and the limit spring is located at the upper end of the inductor body.

[0014] Preferably, an adjustment structure is provided at the lower end of the circuit board body, and the adjustment structure can achieve the effect of accurately docking the connector;

[0015] The adjustment structure is provided with a connecting rope and a guide plate inside, the upper end of the connecting rope is fixedly connected to the sliding plate, and two groups of connecting ropes are symmetrically arranged about the vertical center axis of the inductor body, and the guide plate is fixedly installed at one end of the connecting rope away from the sliding plate.

[0016] Preferably, a docking member and a guide member are provided inside the adjustment structure, the docking member is fixedly mounted on the lower end of the circuit board body, the guide member is fixedly mounted inside the guide plate, and the guide member and the guide plate are arranged correspondingly.

[0017] Preferably, a first magnetic sheet and a second magnetic sheet are provided inside the adjustment structure, the first magnetic sheet is fixedly mounted on the upper end of the guide plate, the second magnetic sheet is fixedly mounted inside the lower end of the circuit board body, and the second magnetic sheet and the first magnetic sheet have special-shaped magnetic poles.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. A push plate and a limit spring are provided. During the installation of the inductor body, the two sets of push plates and the limit spring will move relative to each other, so that the limit spring is located at the upper end of the inductor body and limits the inductor body, thereby quickly completing the installation of the inductor body;

[0020] 2. A contact cylinder and a moving cylinder are provided. When the two sets of push plates move away from each other, the moving cylinder will move upward, and the contracted support spring inside the moving cylinder will expand, thereby pushing the inductor body upward and separating it from the circuit board body through the contact cylinder, thereby completing the quick disassembly process of the inductor and ensuring the convenience of disassembly of the inductor;

[0021] 3. Further, a guide plate and a guide member are provided, the guide member will preferentially contact the butt joint and guide the butt joint, and the guide member and the guide plate will move downward and assist the butt joint and the butt joint member to butt joint, thereby ensuring the accuracy of butt joint and butt joint member;

[0022] 4. Furthermore, a first magnetic sheet and a second magnetic sheet are provided, and the guide plate and the guide member can be supported by the attraction of the first magnetic sheet and the second magnetic sheet, so that the guide member can guide the docking joint next time;

[0023] 5. Furthermore, a heat sink is provided, and the heat sink can transfer and dissipate the heat inside the inductor body through the fixing parts, and the heat sink inside the heat sink will accelerate the speed of heat loss, thereby accelerating the cooling of the inductor body, achieving the effect of reducing the low loss of the inductor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0026] Figure 3 This is a front cross-sectional structural diagram of the guide member of the utility model;

[0027] Figure 4 This is a schematic diagram of the top view structure of the utility model;

[0028] Figure 5 This is a schematic diagram of the top view of the fixing member of the utility model;

[0029] Figure 6 This is a schematic diagram of the top view of the guide member of the utility model.

[0030] In the figure: 1. circuit board body; 2. inductor body; 3. fixing part; 4. heat sink; 5. heat sink; 6. contact cylinder; 7. moving cylinder; 8. supporting spring; 9. traction rope; 10. fixing plate; 11. sliding plate; 12. pushing plate; 13. limiting spring; 14. connecting rope; 15. docking part; 16. guide plate; 17. guide part; 18. docking head; 19. first magnetic sheet; 20. second magnetic sheet. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1: This embodiment Figure 1-Figure 2 and Figure 4-Figure 5 As shown, in order to solve the problem that the existing inductor is inconvenient to disassemble, the working process of the internal limiting structure of the low-loss planar inductor is disclosed, and the effect of the inductor being able to be quickly disassembled and assembled is achieved, and the specific contents are as follows:

[0033] A limiting structure is provided inside the circuit board body 1, and the limiting structure can achieve the effect of rapid disassembly and assembly of the inductor body 2 inside the circuit board body 1;

[0034] The limiting structure is provided with a contact cylinder 6, a moving cylinder 7 and a supporting spring 8 inside. The contact cylinder 6 is slidably mounted inside the fixing member 3, and the moving cylinder 7 is slidably mounted inside the contact cylinder 6. The moving cylinder 7 is located at the upper end of the heat dissipation plate 4. The contact cylinder 6 and the moving cylinder 7 are provided with a supporting spring 8 inside.

[0035] A traction rope 9 and a fixing plate 10 are arranged inside the limiting structure. The traction rope 9 is fixedly mounted on the lower end of the moving cylinder 7. The fixing plate 10 is fixedly mounted on the upper end of the circuit board body 1. A sliding plate 11 is slidably mounted inside the fixing plate 10. The lower end of the sliding plate 11 is fixedly connected to the traction rope 9.

[0036] A push plate 12 and a limit spring 13 are arranged inside the limiting structure. The push plate 12 is fixedly mounted on the upper end of the sliding plate 11. The limit spring 13 is mounted on the upper end of the push plate 12 on one side close to the inductor body 2. The limit spring 13 and the push plate 12 are arranged in two groups symmetrically about the vertical center axis of the inductor body 2, and the limit spring 13 is located at the upper end of the inductor body 2.

[0037] When using the low-loss planar inductor, the planar inductor is first installed at a position where work is required. In the process of installing the circuit board body 1 inside the upper end of the inductor body 2, the inductor body 2 can be directly snap-fitted and installed inside the circuit board body 1. Before the inductor body 2 contacts the circuit board body 1, it contacts and squeezes the contact cylinder 6. After being squeezed, the contact cylinder 6 slides downward on the outside of the moving cylinder 7. During the sliding of the contact cylinder 6, the moving cylinder 7 moves downward synchronously. During the movement of the moving cylinder 7, the sliding plate 11 is pulled by the traction rope 9 to slide inside the fixed plate 10. The movement of the sliding plate 11 During the movement, the push plate 12 and the limiting spring piece 13 will be driven to move, and then the limiting spring piece 13 can be brought into contact with both sides of the inductor body 2, and the inductor body 2 will still squeeze the contact cylinder 6 and make the contact cylinder 6 move. At this time, the support spring 8 is in a contracted state. After the circuit board body 1 and the inductor body 2 are engaged, the contracted support spring 8 will expand and push the moving cylinder 7 to move downward. During the downward movement of the moving cylinder 7, the sliding plate 11 will be pulled to move by the traction rope 9. During the movement of the sliding plate 11, the push plate 12 will drive the limiting spring piece 13 to move to the upper end of the inductor body 2, and the limiting of the inductor body 2 is completed.

[0038] In the process of disassembling the inductor body 2, it is necessary to push the two groups of pushing plates 12 away from each other. In the process of the pushing plates 12 moving away from each other, the sliding plate 11 will slide inside the fixed plate 10, and in the process of the sliding plate 11 moving away, the moving cylinder 7 will be pulled to move by the traction rope 9, and in the process of the moving cylinder 7 moving, the supporting spring 8 will be squeezed and the supporting spring 8 will be contracted. After the limiting spring piece 13 is separated from the inductor body 2, the contracted supporting spring 8 will expand and push the contact cylinder 6 to move, and in the process of the contact cylinder 6 moving, the inductor body 2 will be pushed to move and separate from the circuit board body 1, so as to facilitate the removal of the inductor body 2. At this point, the disassembly and assembly process of the inductor body 2 is completed, and the convenience of disassembly and assembly of the inductor body 2 is effectively improved.

[0039] Embodiment 2: This embodiment is as follows Figure 1-Figure 3 and Figure 6As shown, in order to solve the problem that the existing inductor joint 18 may not be properly connected during installation, the working process of the internal adjustment structure of the low-loss planar inductor is disclosed, so that the inductor can be quickly and accurately connected. The specific contents are as follows:

[0040] The lower end of the circuit board body 1 is provided with an adjustment structure, and the adjustment structure can achieve the effect of accurate docking of the connector 18;

[0041] A connecting rope 14 and a guide plate 16 are arranged inside the adjustment structure. The upper end of the connecting rope 14 is fixedly connected to the sliding plate 11, and two groups of connecting ropes 14 are arranged symmetrically about the vertical center axis of the inductor body 2, and the guide plate 16 is fixedly installed at one end of the connecting rope 14 away from the sliding plate 11;

[0042] The adjustment structure is provided with a docking member 15 and a guide member 17 inside. The docking member 15 is fixedly mounted on the lower end of the circuit board body 1. The guide member 17 is fixedly mounted inside the guide plate 16. The guide member 17 is arranged correspondingly to the guide plate 16.

[0043] A first magnetic piece 19 and a second magnetic piece 20 are arranged inside the adjustment structure. The first magnetic piece 19 is fixedly mounted on the upper end of the guide plate 16, and the second magnetic piece 20 is fixedly mounted inside the lower end of the circuit board body 1, and the second magnetic piece 20 and the first magnetic piece 19 are special-shaped magnetic poles.

[0044] During the installation of the inductor body 2, the docking joint 18 will move with the inductor body 2, and during the downward movement of the docking joint 18, it will first contact with the guide member 17 and make the guide member 17 move downward, and during the downward movement of the guide member 17, it will drive the guide plate 16 to move downward synchronously, and the guide plate 16 will move downward and separate the first magnetic sheet 19 from the second magnetic sheet 20, and the downward movement of the guide member 17 will contact with the docking member 15 and assist the docking joint 18 to dock with the docking member 15, thereby completing the docking process of the docking member 15 and the docking joint 18;

[0045] During the removal of the inductor body 2, the sliding plate 11 will pull the guide plate 16 upward through the connecting rope 14. The upward movement of the guide plate 16 will cause the guide member 17 to move to the initial position, and the first magnetic sheet 19 will attract the second magnetic sheet 20 again to support the guide plate 16 and the guide member 17. The guide member 17 will guide the docking joint 18, effectively ensuring the accuracy of the docking between the docking member 15 and the docking joint 18.

[0046] Embodiment 3: This embodiment is as follows Figure 1-Figure 3 As shown, in order to solve the problem of poor heat dissipation effect of the existing inductor, the working process of the upper and lower heat dissipation structure inside the low-loss planar inductor is disclosed, and the effect of the inductor being able to quickly dissipate heat is achieved. The specific contents are as follows:

[0047] A circuit board body 1 and an inductor body 2 mounted on the upper end of the circuit board body 1;

[0048] A fixing part 3 is fixedly installed inside the circuit board body 1 , and a heat sink 4 is fixedly installed at the lower end of the fixing part 3 , and heat sink grooves 5 are evenly spaced inside the heat sink 4 . A docking joint 18 is fixedly installed at the lower end of the inductor body 2 .

[0049] When the low-loss planar inductor is used, heat is generated inside the inductor body 2, and the push plate 12 and the limiting spring piece 13 are both made of metal, which can effectively transfer the heat generated by the inductor body 2, and the heat sink 4 is in contact with the inductor body 2 through the fixing member 3, and the heat sink 4 is provided with heat dissipation grooves 5 inside, and the upper end of the fixing member 3 is equidistantly provided with through holes, and the lower end of the inductor body 2 can be heat-dissipated by the heat sink 4, and the upper and lower ends of the inductor body 2 are heat-dissipated, so that the heat dissipation effect of the inductor body 2 can be effectively guaranteed, thereby reducing the temperature and resistance inside the inductor body 2, thereby achieving the effect of reducing losses and increasing the overall practicality.

[0050] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0051] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-loss planar inductor, comprising a circuit board body (1) and an inductor body (2) mounted on the upper end of the circuit board body (1); Features: The circuit board body (1) further comprises a fixing member (3) fixedly mounted inside, a heat sink (4) fixedly mounted at the lower end of the fixing member (3), heat sink grooves (5) equidistantly arranged inside the heat sink (4), and a docking joint (18) fixedly mounted at the lower end of the inductor body (2); A limiting structure is arranged inside the circuit board body (1), and the limiting structure can achieve the effect of rapid disassembly and assembly of the inductor body (2) inside the circuit board body (1).

2. A low-loss planar inductor according to claim 1, characterized in that: A contact cylinder (6), a moving cylinder (7) and a supporting spring (8) are arranged inside the limiting structure; the contact cylinder (6) is slidably mounted inside the fixing member (3); the moving cylinder (7) is slidably mounted inside the contact cylinder (6); the moving cylinder (7) is located at the upper end of the heat dissipation plate (4); and a supporting spring (8) is arranged inside the contact cylinder (6) and the moving cylinder (7).

3. A low-loss planar inductor according to claim 2, characterized in that: A traction rope (9) and a fixing plate (10) are arranged inside the limiting structure. The traction rope (9) is fixedly mounted on the lower end of the moving cylinder (7). The fixing plate (10) is fixedly mounted on the upper end of the circuit board body (1). A sliding plate (11) is slidably mounted inside the fixing plate (10), and the lower end of the sliding plate (11) is fixedly connected to the traction rope (9).

4. A low-loss planar inductor according to claim 1 or 3, characterized in that: A push plate (12) and a limit spring sheet (13) are arranged inside the limit structure. The push plate (12) is fixedly mounted on the upper end of the sliding plate (11). The limit spring sheet (13) is mounted on a side of the upper end of the push plate (12) close to the inductor body (2). The limit spring sheet (13) and the push plate (12) are arranged in two groups symmetrically about the vertical center axis of the inductor body (2). The limit spring sheet (13) is located at the upper end of the inductor body (2).

5. The low-loss planar inductor according to claim 1, characterized in that: An adjustment structure is provided at the lower end of the circuit board body (1), and the adjustment structure can achieve the effect of accurately docking the connector (18); A connecting rope (14) and a guide plate (16) are arranged inside the adjustment structure. The upper end of the connecting rope (14) is fixedly connected to the sliding plate (11). Two groups of connecting ropes (14) are arranged symmetrically about the vertical center axis of the inductor body (2). The guide plate (16) is fixedly mounted on one end of the connecting rope (14) away from the sliding plate (11).

6. A low-loss planar inductor according to claim 5, characterized in that: A docking member (15) and a guide member (17) are arranged inside the adjustment structure. The docking member (15) is fixedly mounted on the lower end of the circuit board body (1), and the guide member (17) is fixedly mounted inside the guide plate (16). The guide member (17) and the guide plate (16) are arranged correspondingly.

7. A low-loss planar inductor according to claim 6, characterized in that: A first magnetic sheet (19) and a second magnetic sheet (20) are arranged inside the adjustment structure. The first magnetic sheet (19) is fixedly mounted on the upper end of the guide plate (16), and the second magnetic sheet (20) is fixedly mounted inside the lower end of the circuit board body (1). The second magnetic sheet (20) and the first magnetic sheet (19) are different-shaped magnetic poles.

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