An adjustable inductor

Abstract

The present application relates to an adjustable inductor, comprising a mounting tube and a magnetic core, wherein a coil is spirally wound on the outside of the mounting tube, both ends of the coil are connected to a current-carrying wire, a mounting cavity is arranged inside the mounting tube, the magnetic core is connected to the mounting cavity by sliding along the axis direction of the mounting tube, the mounting tube is provided with a driving rod for driving the magnetic core to slide, and the mounting tube is provided with a limiting member for limiting the driving rod. The present application has the effect of improving the convenience of operation.

Description

Technical Field

[0001] The present application relates to the technical field of inductors, and in particular to an adjustable inductor. Background Art

[0002] During the development of medium wave transmitter products, it is necessary to design an inductor to be installed on the motherboard for tuning and matching. Existing inductors are usually fixed value inductors, and different frequencies require different fixed value inductors, which results in a relatively single adaptability of the inductor. Utility Model Content

[0003] In order to improve the adaptability of the inductor, the present application provides an adjustable inductor.

[0004] The present application provides an adjustable inductor adopting the following technical solution:

[0005] An adjustable inductor comprises a mounting tube and a magnetic core, wherein a coil is spirally wound on the outside of the mounting tube, both ends of the coil are connected to current-carrying wires, a mounting cavity is arranged inside the mounting tube, the magnetic core is slidably connected to the mounting cavity along the axial direction of the mounting tube, the mounting tube is provided with a driving rod for driving the magnetic core to slide, and the mounting tube is provided with a limiting member for limiting the driving rod.

[0006] By adopting the above technical solution, firstly, the position of the energized wire is adjusted to short-circuit part of the coil and change the number of turns of the working coil of the inductor. Then, the driving rod is adjusted to pull the magnetic core to slide inside the mounting tube, thereby changing the size of the magnetic field in which the working coil of the inductor is located, and then adjusting the inductance of the inductor to adapt it to different frequencies, thereby improving the adaptability of the inductor.

[0007] Optionally, the outer peripheral wall of the installation tube is provided with a first limiting groove for clamping the coil, and the first limiting groove is spirally arranged around the axial direction of the installation tube.

[0008] By adopting the above technical solution, a first limiting groove is opened on the outer peripheral wall of the installation tube, and the coil is located in the first limiting groove, thereby reducing the possibility of short circuit caused by contact between adjacent coils under the action of external force.

[0009] Optionally, the driving rod is a screw rod, one end of which is connected to the magnetic core, and the limiting member is a nut, which is threadedly connected to the screw rod.

[0010] By adopting the above technical solution, when different inductances need to be adjusted, the magnetic core is driven to slide by the driving rod. After sliding to the corresponding position, the nut is tightened so that the nut abuts against the mounting tube, thereby limiting the driving rod.

[0011] Optionally, connecting legs are fixed to both ends of the mounting tube, and connecting bolts are provided on the connecting legs.

[0012] By adopting the above technical solution, a connecting foot is provided, and the connecting foot is connected to the motherboard on the medium wave transmitter through the connecting bolts on the connecting foot.

[0013] Optionally, the driving rod is slidably connected to the mounting tube along the axial direction of the mounting tube, and the limiting member is a clamping member, which is used to clamp the driving rod.

[0014] By adopting the above technical solution, when different inductances need to be adjusted, the magnetic core is driven to slide by the driving rod, and after sliding to the corresponding position, the driving rod is clamped by the limiting member to fix the position of the magnetic core.

[0015] Optionally, the clamping member includes a mounting seat having a sliding cavity and a sliding plate slidably connected to the sliding cavity, the mounting seat is provided with a first through hole for the driving rod to pass through, the sliding plate is provided with a second through hole for the driving rod to pass through and corresponding to the position of the first through hole, and the mounting cavity is provided with an elastic member that forces the sliding plate to slide so that the first through hole and the second through hole are staggered.

[0016] By adopting the above technical solution, when the magnetic core needs to be adjusted, the sliding plate is pressed so that the first through hole and the second through hole are coaxially arranged, and then the driving rod is moved to drive the magnetic core to move. After moving to the corresponding position, the sliding plate is released, and the sliding plate slides under the action of the elastic member, thereby clamping the driving rod.

[0017] Optionally, a plurality of second limiting grooves are formed on the outer peripheral wall of the driving rod, and the plurality of second limiting grooves are distributed along the axial direction of the driving rod, and a clamping portion corresponding to the second limiting grooves is formed on the hole wall of the second through hole.

[0018] By adopting the above technical solution, the clamping portion is clamped in the second limiting groove, thereby improving the limiting stability of the sliding plate on the driving rod.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. First, adjust the position of the energized wire, short-circuit part of the coil, change the number of turns of the working coil of the inductor, and then adjust the driving rod to pull the magnetic core to slide inside the installation tube, change the size of the magnetic field where the working coil of the inductor is located, and then adjust the inductance of the inductor to adapt it to different frequencies, thereby improving the adaptability of the inductor;

[0021] 2. When the magnetic core needs to be adjusted, press the sliding plate so that the first through hole and the second through hole are coaxially arranged, and then move the driving rod to drive the magnetic core to move. After moving to the corresponding position, release the sliding plate, and the sliding plate slides under the action of the elastic member, thereby clamping the driving rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of Example 1;

[0023] Figure 2 is a schematic diagram of the internal structure of the installation cylinder in Example 1;

[0024] Figure 3 is a schematic structural diagram of Example 2;

[0025] Figure 4 yes Figure 3 A magnified schematic diagram of center A.

[0026] In the figure, 1. mounting cylinder; 11. mounting cavity; 12. connecting leg; 13. connecting bolt; 2. magnetic core; 21. driving rod; 211. second limiting groove; 22. nut; 3. clamping member; 31. mounting seat; 311. sliding cavity; 312. spring; 313. first penetration hole; 32. sliding plate; 321. second penetration hole; 322. clamping part; 4. current-carrying wire. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 This application is described in further detail.

[0028] Embodiment 1:

[0029] Embodiment 1 of the present application discloses an adjustable inductor, referring to Figure 1 and Figure 2 , including a mounting tube 1 and a magnetic core 2. A coil is spirally wound on the outside of the mounting tube 1. Both ends of the coil are connected to a current-carrying wire. The current-carrying wire 4 can be connected to the coil by soldering or clamped to the coil by a conductive clip. The number of turns of the working coil can be adjusted by controlling the connection position of the current-carrying wire 4. The mounting tube 1 of the coil has a mounting cavity 11. The magnetic core 2 is slidably connected to the mounting cavity 11 along the axial direction of the mounting tube 1. The mounting tube 1 is provided with a driving rod 21 for driving the magnetic core 2 to slide. One end of the driving rod 21 is fixedly connected to the magnetic ring. The mounting tube 1 is provided with a limiting member for limiting the driving rod 21.

[0030] Reference Figure 1 and Figure 2 The driving rod 21 is a screw rod, a third through hole is formed on the end surface of the mounting tube 1, the screw rod is penetrated through the third through hole and extends out of the mounting cavity 11, and the limiting member is a nut 22, which is threadedly connected to the screw rod.

[0031] Reference Figure 1 and Figure 2 The outer wall of the installation tube 1 is provided with a first limiting groove for clamping the coil, and the first limiting groove is spirally arranged around the axial direction of the installation tube 1.

[0032] Reference Figure 1 and Figure 2 Both ends of the mounting tube 1 are fixedly connected with connecting legs 12 , and the connecting legs 12 are fixedly connected with connecting bolts 13 .

[0033] The implementation principle of Example 1 of the present application is: first adjust the position of the energized conductor 4, short-circuit part of the coil, change the number of turns of the working coil of the inductor, and then adjust the driving rod 21 to pull the magnetic core 2 to slide inside the mounting tube 1, change the size of the magnetic field where the working coil of the inductor is located, and then adjust the inductance of the inductor to adapt it to different frequencies, thereby improving adaptability.

[0034] Embodiment 2:

[0035] The difference between Example 2 and Example 1 is that, referring to Figure 3 and Figure 4 The limiting member is a clamping member 3 , which is arranged on the end surface of the mounting tube 1 , and is used to clamp the driving rod 21 .

[0036] Reference Figure 3 and Figure 4 The clamping member 3 includes a mounting seat 31 having a sliding cavity 311 and a sliding plate 32 slidably connected to the sliding cavity 311. The mounting seat 31 is provided with a first through hole 313 for the driving rod 21 to pass through. The mounting seat 31 is fixedly connected to the end surface of the mounting tube 1. The first through hole 313 and the third through hole are coaxially arranged. The sliding plate 32 is provided with a second through hole 321 for the driving rod 21 to pass through and corresponding to the position of the first through hole 313. The mounting cavity 11 is provided with an elastic member forcing the sliding plate 32 to slide so that the first through hole 313 and the second through hole 321 are staggered.

[0037] Reference Figure 3 and Figure 4 The elastic member is a spring 312 , which is located in the sliding cavity 311 , one end of the spring 312 is fixedly connected to the bottom wall of the sliding cavity 311 , and the other end of the spring 312 is fixedly connected to the sliding plate 32 .

[0038] Reference Figure 3 and Figure 4The outer wall of the driving rod 21 is provided with a plurality of second limiting grooves 211 , and the plurality of second limiting grooves 211 are distributed along the axial direction of the driving rod 21 . The hole wall of the second through hole 321 is protrudingly provided with a clamping portion 322 corresponding to the second limiting groove 211 .

[0039] The implementation principle of Example 2 is: when the magnetic core 2 needs to be adjusted, press the sliding plate 32 so that the first penetration hole 313 and the second penetration hole 321 are coaxially arranged, and then move the driving rod 21 to drive the magnetic core 2 to move. After moving to the corresponding position, release the sliding plate 32, and the sliding plate 32 slides under the action of the spring 312, thereby clamping the driving rod 21.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An adjustable inductor, characterized in that: The invention comprises a mounting tube (1) and a magnetic core (2), wherein a coil is spirally wound on the outside of the mounting tube (1), and both ends of the coil are connected to current-carrying wires. A mounting cavity (11) is provided inside the mounting tube (1), and the magnetic core (2) is slidably connected to the mounting cavity (11) along the axial direction of the mounting tube (1). The mounting tube (1) is provided with a driving rod (21) for driving the magnetic core (2) to slide, and the mounting tube (1) is provided with a limiting member for limiting the driving rod (21).

2. The adjustable inductor according to claim 1, characterized in that: The outer peripheral wall of the installation tube (1) is provided with a first limiting groove for clamping the coil, and the first limiting groove is arranged in a spiral shape around the axial direction of the installation tube (1).

3. The adjustable inductor according to claim 1, characterized in that: The driving rod (21) is a screw rod, one end of which is connected to the magnetic core (2), and the limiting member is a nut (22), which is threadedly connected to the screw rod.

4. The adjustable inductor according to claim 1, characterized in that: Connecting legs (12) are fixed to both ends of the installation cylinder (1), and connecting bolts (13) are provided on the connecting legs (12).

5. The adjustable inductor according to claim 1, characterized in that: The driving rod (21) is slidably connected to the mounting tube (1) along the axial direction of the mounting tube (1); the limiting member is a clamping member (3); and the clamping member (3) is used to clamp the driving rod (21).

6. The adjustable inductor according to claim 5, characterized in that: The clamping member (3) comprises a mounting seat (31) having a sliding cavity (311) and a sliding plate (32) slidably connected to the sliding cavity (311); the mounting seat (31) is provided with a first through hole (313) for the driving rod (21) to pass through; the sliding plate (32) is provided with a second through hole (321) for the driving rod (21) to pass through and corresponding to the position of the first through hole (313); and the mounting cavity (11) is provided with an elastic member for forcing the sliding plate (32) to slide so that the first through hole (313) and the second through hole (321) are arranged in a staggered manner.

7. The adjustable inductor according to claim 6, characterized in that: The outer peripheral wall of the driving rod (21) is provided with a plurality of second limiting grooves (211), the plurality of second limiting grooves (211) are distributed along the axial direction of the driving rod (21), and the hole wall of the second penetration hole (321) is provided with a clamping portion (322) corresponding to the second limiting groove (211).

Images