A variable inductor

Abstract

The present invention provides a variable inductor, comprising a coil frame and a loading coil wound on the coil frame, the coil frame is provided with a plurality of wire-holding protrusions arranged side by side in the circumferential direction, the distance between adjacent wire-holding protrusions is adapted to the diameter of the loading coil, the height and width of the wire-holding protrusions are both smaller than the diameter of the loading coil, each wire-holding protrusion is provided with a wiring clearance opening, the loading coils are staggered and stacked on the coil frame in two layers, the loading coils located at the bottom layer are wound on both sides of the wire-holding protrusions, the loading coils located at the top layer are wound close to each other between two adjacent coils located at the bottom layer, and during winding, each layer of the loading coils jumps from one side of a wire-holding protrusion to the other side at the wiring clearance opening, so as to facilitate manual and accurate winding of the loading coils.

Description

Technical Field

[0001] The present invention relates to the technical field of inductors, and in particular to a variable inductor. Background Art

[0002] In the manual winding process of the existing variable inductor including the inductance coil, the number of winding turns depends on manual counting, which is prone to errors. The length of the coil is not uniform during batch winding, resulting in a large inductance error, which makes the manually wound inductance coil have a large error. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a variable inductor, which is convenient for manually and accurately winding the inductance coil, so that the inductance error of the inductance coil is small and the precision is high.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A variable inductor comprises a coil frame and a loading coil wound on the coil frame, wherein the coil frame is provided with a plurality of wire-holding protrusions arranged side by side in the circumferential direction, the distance between adjacent wire-holding protrusions is adapted to the diameter of the loading coil, the height and width of the wire-holding protrusions are both smaller than the diameter of the loading coil, each of the wire-holding protrusions is provided with a wiring clearance opening, the loading coils are staggered and stacked in two layers on the coil frame, the loading coils located on the bottom layer are wound on both sides of the wire-holding protrusions, and the loading coils located on the top layer are wound close to and between two adjacent turns of the loading coils located on the bottom layer, and when winding, each layer of the loading coils jumps from one side of a wire-holding protrusion to the other side at the wiring clearance opening.

[0006] Furthermore, each of the wire-holding protrusions is provided with a wire-blocking protrusion, the height of the wire-blocking protrusion is greater than or equal to twice the diameter of the loading coil, the wire-blocking protrusion is connected to the wiring clearance opening, and the wire-blocking protrusion is located at the front end of the wiring clearance opening along the winding direction.

[0007] Furthermore, when winding the loading coil, the odd-numbered turns starting from the third turn are wound on the top layer, and the other turns are wound on the bottom layer.

[0008] Furthermore, after the winding of the loading coil located at the bottom layer is completed, the winding of the loading coil located at the top layer is started.

[0009] Furthermore, it also includes a binding strap, the inductive coil includes at least one tap, the coil skeleton is provided with an inner hole and a tap wire clamping hole, the tap wire clamping hole is communicated with the inner hole, and two tap wire clamping holes are correspondingly provided at each tap. When winding, the binding strap passes through the two tap wire clamping holes and binds the tap.

[0010] Furthermore, a coil starting wire clamping hole and a coil ending wire clamping hole are provided at the end of the coil skeleton, and the coil starting wire clamping hole and the coil ending wire clamping hole are both communicated with the inner hole of the coil skeleton, and the inner hole of the coil skeleton is communicated with its two ends. During winding, a binding strap passes through the coil starting wire clamping hole, the inner hole and one end of the coil skeleton, and binds the starting end of the inductive coil, and another binding strap passes through the coil ending wire clamping hole, the inner hole and the other end of the coil skeleton, and binds the ending end of the inductive coil.

[0011] Furthermore, a plurality of the wire-holding protrusions are aligned with each other to form a tap-out opening, and the tap-holding hole is located at the tap-out opening.

[0012] Furthermore, the coil frame is cylindrical, including a tubular frame and two end covers, and the two end covers are respectively fixed at two ends of the tubular frame.

[0013] Furthermore, the wiring clearance openings on the plurality of wire-holding protrusions are arranged to be aligned.

[0014] Furthermore, a circle of limiting protrusions is respectively provided at both ends of the coil frame, the height of the limiting protrusions is greater than or equal to 1.5 times the diameter of the inductive coil, and the distance between the limiting protrusions and the adjacent wire-holding protrusions is adapted to the diameter of the inductive coil.

[0015] The beneficial effects of the present invention are as follows: the position and number of turns of the inductance coil of the bottom layer are limited by the wire clamping protrusion, and the position and number of turns of the inductance coil of the top layer are limited by the inductance coil of the bottom layer, so that when the variable inductor including the inductance coil is manually wound, the number of turns of the coil does not need to be counted, the number of winding turns will not be wrong, and the inductance error is small; two layers can be wound each time, the volume is small with the same number of turns, and the wound coil is longer with the same volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of a variable inductor of the present invention;

[0017] Figure 2 An exploded view of a coil skeleton of a variable inductor of the present invention;

[0018] Figure 3 For the embodiment of the present invention Figure 2 A partial enlarged view of;

[0019] Figure 4 A schematic diagram of winding a loading coil of a variable inductor according to an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of winding a loading coil of a variable inductor according to an embodiment of the present invention;

[0021] Figure 6 FIG. 4 is a circuit diagram of a variable inductor according to an embodiment of the present invention when used.

[0022] Description of labels:

[0023] 1. Coil skeleton; 2. Loading coil;

[0024] 11. Wire clamping protrusion; 12. Inner hole; 13. Tap wire clamping hole; 14. Coil starting wire clamping hole; 15. Coil ending wire clamping hole; 16. Tubular skeleton; 17. End cover; 18. Reinforcement ribs; 19. Limiting protrusion;

[0025] 111. Opening for making way for wiring; 112. bulge for blocking wires; 113. Opening for making way for tapping;

[0026] 21. Tap. DETAILED DESCRIPTION

[0027] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0028] Please refer to Figures 1 to 6 , Embodiment 1 provided by the present invention is:

[0029] A variable inductor comprises a coil skeleton 1 and a loading coil 2 wound on the coil skeleton 1. The coil skeleton 1 is provided with a plurality of wire-holding protrusions 11 arranged side by side in the circumferential direction. The distance between adjacent wire-holding protrusions 11 matches the diameter of the loading coil 2. The height and width of the wire-holding protrusions 11 are both smaller than the diameter of the loading coil 2. Each of the wire-holding protrusions 11 is provided with a wiring clearance opening 111. The loading coils 2 are staggered and stacked in two layers on the coil skeleton 1. The loading coils 2 located on the bottom layer are wound on both sides of the wire-holding protrusions 11. The loading coils 2 located on the top layer are wound close to and between two adjacent turns of the loading coils 2 located on the bottom layer. When winding, each layer of the loading coils 2 jumps from one side of a wire-holding protrusion 11 to the other side at the wiring clearance opening 111.

[0030] Adjacent wire-holding protrusions 11 are interference-fitted with the loading coils 2, so that the wire-holding protrusions 11 can position the loading coils 2 and facilitate the installation of the loading coils 2. The loading coils 2 located at the bottom layer and the loading coils 2 located at the top layer are both wound from the current circle to the next circle at the wiring clearance opening 111, so that the winding of the loading coils 2 is more regular and the inductance control accuracy is higher. Furthermore, the wire-holding protrusions 11 are a continuous multi-semicircular arc protrusion, or are composed of a plurality of intermittent less semicircular arc protrusions, which are easy to process.

[0031] Preferably, the shape between adjacent wire-holding protrusions 11 is rectangular, semicircular or U-shaped, which is convenient for winding the loading coil 2 .

[0032] The loading coil 2 includes at least one tap 21. Only one loading coil 2 can be placed between adjacent wire-holding protrusions 11. The loading coil 2 located at the bottom layer is wound on both sides of the wire-holding protrusions 11. The loading coil 2 located at the top layer is wound between two adjacent turns of the loading coil 2 at the bottom layer. The loading coil 2 is positioned by the two adjacent turns of the loading coil 2. Therefore, during the manual winding process, the winding position and length of the loading coil 2 are fixed, and there is no need to manually count the number of turns, thereby improving the efficiency of manual winding, and the inductance accuracy is high, which is convenient for manual batch production.

[0033] The second embodiment provided by the present invention is:

[0034] On the basis of embodiment 1, further, each of the wire-holding protrusions 11 is provided with a wire-blocking protrusion 112, the height of the wire-blocking protrusion 112 is greater than or equal to twice the diameter of the loading coil 2, the wire-blocking protrusion 112 is connected to the wiring clearance opening 111, and the wire-blocking protrusion 112 is located at the front end of the wiring clearance opening 111 along the winding direction.

[0035] The wire blocking protrusion 112 can not only position the loading coil 2 located on the bottom layer, but also position the loading coil 2 located on the top layer, thereby further improving the winding accuracy of the loading coil 2 in length, and also facilitating the accurate positioning of the loading coil 2 located on the top layer during the manual winding process of the loading coil 2, thereby facilitating manual mass production.

[0036] Preferably, the cross-sectional shape of the wire-blocking protrusion 112 is the same as that of the wire-clamping protrusion 11, but the wire-blocking protrusion 112 is higher than the wire-clamping protrusion 11, which is convenient for processing and manufacturing.

[0037] Please refer to Figure 4 , Embodiment 3 provided by the present invention is:

[0038] On the basis of the first or second embodiment, specifically, when winding the loading coil 2, the odd turns starting from the third turn are wound on the top layer, and the other turns are wound on the bottom layer. That is, in the process of winding the loading coil 2, the first and second turns are wound on the bottom layer, the third turn is wound on the top layer, the fourth turn is wound on the bottom layer, the fifth turn is wound on the top layer, and so on, until the number of turns is reached, and the loading coil 2 is wound closely. If a total of 11 turns are wound, please refer to Figure 4 The 1st, 2nd, 4th, 6th, 8th, and 10th turns are located at the bottom layer, and the 3rd, 5th, 7th, 9th, and 11th turns are located at the top layer. The coils are wound in numerical sequence.

[0039] Please refer to Figure 5 , the fourth embodiment provided by the present invention is:

[0040] On the basis of the first or second embodiment, specifically, the loading coil 2 at the bottom layer is wound before the loading coil 2 at the top layer is wound. That is, in the process of winding the loading coil 2, the loading coil 2 at the bottom layer is first arranged closely on the left and right sides of the wire clamping protrusion 11, and then the loading coil 2 at the top layer is arranged in the groove formed by the loading coil 2 at the bottom layer, so that the loading coil 2 can be wound quickly and conveniently. If a total of 11 turns are wound, please refer to Figure 5 The 1st, 2nd, 3rd, 4th, 5th and 6th turns are located at the bottom layer, and the 7th, 8th, 9th, 10th and 11th turns are located at the top layer. The coils are wound in numerical sequence.

[0041] Embodiment 5 provided by the present invention is:

[0042] On the basis of the first embodiment, further, it also includes a binding tape, the inductor coil 2 includes at least one tap 21, the coil skeleton 1 is provided with an inner hole 12 and a tap wire clamping hole 13, the tap wire clamping hole 13 is communicated with the inner hole 12, and two tap wire clamping holes 13 are correspondingly provided at each of the taps 21. When winding, the binding tape passes through the two tap wire clamping holes 13 and binds the tap 21.

[0043] Specifically, the tap wire clamping holes 13 are arranged on the outer side of the coil frame 1. Through the two tap wire clamping holes 13, it is convenient to thread the binding strap, so as to realize the positioning of the tap 21 of the inductance coil 2, thereby further improving the accuracy of the inductance of the inductance coil 2 during the manual winding process.

[0044] Furthermore, a coil starting wire clamping hole 14 and a coil ending wire clamping hole 15 are also provided at the end of the coil skeleton 1, and the coil starting wire clamping hole 14 and the coil ending wire clamping hole 15 are both communicated with the inner hole 12 of the coil skeleton 1, and the inner hole 12 of the coil skeleton 1 is communicated with its two ends. During winding, a binding strap passes through the coil starting wire clamping hole 14, the inner hole 12 and one end of the coil skeleton 1, and binds the starting end of the inductive coil 2, and another binding strap passes through the coil ending wire clamping hole 15, the inner hole 12 and the other end of the coil skeleton 1, and binds the ending end of the inductive coil 2.

[0045] The starting end and the ending end of the inductive coil 2 are positioned respectively through the coil starting wire clamping hole 14 and the coil ending wire clamping hole 15, so as to realize positioning of both ends of the inductive coil 2 and further ensure the length of the inductive coil 2 during the winding process.

[0046] Furthermore, a plurality of the wire-holding protrusions 11 are aligned with each other to form a tap-out opening 113 , and the tap-holding hole 13 is located at the tap-out opening 113 .

[0047] Preferably, the bottom of the tap-out opening 113 is flush with the outer circumferential surface of the coil skeleton 1 .

[0048] The tap openings 113 aligned on the wire-holding protrusions 11 are embodied as a smooth arc surface of a certain width on the coil skeleton 1 , which is convenient for processing the tap wire-holding holes 13 and for further installing heat shrink tubes on the taps 21 .

[0049] The sixth embodiment provided by the present invention is:

[0050] Based on the first or fifth embodiment, please refer to Figure 2 The coil frame 1 is cylindrical, and includes a tubular frame 16 and two end covers 17, and the two end covers 17 are respectively fixed at the two ends of the tubular frame 16. The coil frame 1 is light in weight and easy to process.

[0051] Furthermore, a weight-reducing hole is provided on the end cover 17 to reduce the weight of the coil skeleton 1 .

[0052] Furthermore, a reinforcing rib 18 is provided in the inner hole 12 of the tubular frame 16, and an embedded nut is provided in the end surface of the reinforcing rib 18, and a screw passes through the end cover 17 and is screwed to the embedded nut, thereby improving the structural strength of the tubular frame 16 and facilitating fixed connection with the end cover 17.

[0053] Embodiment 7 provided by the present invention is:

[0054] On the basis of the first embodiment, further, the wiring clearance openings 111 on the plurality of the wire clamping protrusions 11 are aligned. Preferably, the bottom of the wiring clearance opening 111 is flush with the outer cylindrical surface of the coil skeleton 1, and is reflected as a smooth arc surface of a certain width on the coil skeleton 1, which is convenient for the processing of the coil skeleton 1 and also makes the winding of the inductor coil 2 more regular.

[0055] Embodiment 8 provided by the present invention is:

[0056] On the basis of the first embodiment, further, a circle of limiting protrusions 19 are respectively provided at both ends of the coil skeleton 1, the height of the limiting protrusions 19 is greater than or equal to 1.5 times the diameter of the induction coil 2, and the distance between the limiting protrusions 19 and the adjacent wire clamping protrusions 11 is adapted to the diameter of the induction coil 2. The limiting protrusions 19 at both ends of the coil skeleton 1 are used to position the induction coils 2 at both ends to prevent the induction coils 2 at both ends from becoming loose, and the structural strength of the coil skeleton 1 can also be improved, making it easier to grasp the coil skeleton 1.

[0057] The distance between the limiting protrusion 19 and the adjacent wire-holding protrusion 11 is interference-fitted with the diameter of the loading coil 2. Structurally, each section of the loading coil 2 of the variable inductor provided by the present invention is continuously wound, that is, a single coil can be used to realize continuous winding of the loading coil 2 with the tap 21, and the continuous coil only needs to be folded back at the tap 21 and then fixedly connected to the wiring terminal, without welding at the connection of the two sections of the loading coil 2, thereby avoiding the inductance error caused by the welding point and further improving the inductance accuracy.

[0058] From the working principle, the inductance of each section of the inductor coil 2 can be different or the same. Each section of the inductor coil 2 is in series connection. When applying, please refer to Figure 6 As shown in the circuit diagram, each section of the loading coil 2 is connected in parallel with a relay to achieve independent control of each section of the loading coil 2. If a section of the loading coil 2 is required to participate in the work, the relay controlling the section of the loading coil 2 can be turned on, thereby making the inductance of the variable inductor more diverse and having a wider application.

[0059] In summary, the variable inductor provided by the present invention is used to manually wind two layers of loading coils 2. The loading coils 2 are positioned by means of the wire clamping protrusions 11, the wiring clearance openings 111, and the wire blocking protrusions 112 thereon, so that the loading coils 2 are wound tightly and regularly. The tap end and both ends of the loading coils 2 are positioned by means of the tap clamping holes 13, the coil starting wire clamping holes 14, and the coil ending wire clamping holes 15, so that a single coil can realize the winding of the loading coils 2, which is convenient for manual batch winding of the loading coils 2, and the obtained loading coils 2 have high precision. Whether the loading coils 2 of a single section are involved in the work is controlled by means of relays, so that the variable inductor has a variety of variable inductances and is widely used.

[0060] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A variable inductor, characterized in that: The invention comprises a coil frame and an inductance coil wound on the coil frame, wherein the coil frame is provided with a plurality of wire-holding protrusions arranged side by side in the circumferential direction, the distance between adjacent wire-holding protrusions is adapted to the diameter of the inductance coil, the height and width of the wire-holding protrusions are both smaller than the diameter of the inductance coil, each wire-holding protrusion is provided with a wiring clearance opening, the inductance coils are staggered and stacked in two layers on the coil frame, the inductance coils located on the bottom layer are wound on both sides of the wire-holding protrusions, and the inductance coils located on the top layer are wound close to and between two adjacent coils located on the bottom layer, and when winding, each layer of the inductance coils jumps from one side of a wire-holding protrusion to the other side at the wiring clearance opening; A wire blocking protrusion is provided on each of the wire clamping protrusions, the height of the wire blocking protrusion is greater than or equal to twice the diameter of the loading coil, the wire blocking protrusion is connected to the wire routing opening, and the wire blocking protrusion is located at the front end of the wire routing opening along the winding direction; It also includes a binding band, the loading coil includes at least one tap, the coil skeleton is provided with an inner hole and a tap wire clamping hole, the tap wire clamping hole is communicated with the inner hole, and two tap wire clamping holes are correspondingly provided at each tap, and when winding, the binding band passes through the two tap wire clamping holes and binds the tap; The end of the coil frame is also provided with a coil starting wire clamping hole and a coil ending wire clamping hole, and the coil starting wire clamping hole and the coil ending wire clamping hole are both communicated with the inner hole of the coil frame, and the inner hole of the coil frame is communicated with its two ends. During winding, a binding strap passes through the coil starting wire clamping hole, the inner hole and one end of the coil frame, and binds the starting end of the inductive coil, and another binding strap passes through the coil ending wire clamping hole, the inner hole and the other end of the coil frame, and binds the ending end of the inductive coil.

2. The variable inductor according to claim 1, wherein: When winding the loading coil, the odd-numbered turns starting from the 3rd turn are wound on the top layer, and the other turns are wound on the bottom layer.

3. The variable inductor according to claim 1, wherein: After the winding of the loading coil on the bottom layer is completed, the winding of the loading coil on the top layer begins.

4. The variable inductor according to claim 1, wherein: A plurality of the wire-holding protrusions are aligned with each other to form a tap-out opening, and the tap-holding wire hole is located at the tap-out opening.

5. The variable inductor according to claim 1, wherein: The coil frame is cylindrical and comprises a tubular frame and two end covers, and the two end covers are respectively fixed at two ends of the tubular frame.

6. The variable inductor according to claim 1, wherein: The wiring clearance openings on the plurality of wire-holding protrusions are arranged in alignment.

7. The variable inductor according to claim 1, wherein: A circle of limiting protrusions is respectively provided at both ends of the coil frame, the height of the limiting protrusions is greater than or equal to 1.5 times the diameter of the inductive coil, and the distance between the limiting protrusions and the adjacent wire-holding protrusions is adapted to the diameter of the inductive coil.

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