A chip E-type inductor

Abstract

The invention discloses a patch E-type inductor, comprising a skeleton, an E-type magnetic core and pins, and is characterized in that: the skeleton comprises an upper frame and a lower frame, the magnetic core is fixed on the inner side of the upper frame, the end of the magnetic core faces downward, a sleeve is provided on the lower frame, the end of the magnetic core is inserted into the sleeve, a coil is wound on the outer wall of the sleeve, a concave plug-in slot is provided at the end of the upper frame, a vertical accommodating cavity is also provided in the upper frame, the accommodating cavity is communicated with the plug-in slot, a threaded column is installed in the accommodating cavity, a plug-in column is provided at the end of the lower frame, the plug-in column is inserted into the plug-in slot, a threaded hole is provided in the center of the plug-in column, and the lower end of the threaded column is screwed into the threaded hole. The skeleton of the inductor is designed as a movable structure, and the distance between the magnetic core and the coil in the skeleton can be adjusted by screwing operation, so as to adjust the inductance value; in addition, the series-parallel connection mode of each group of coils can be changed by adjusting the paddle, so as to achieve a more detailed and more accurate adjustment of the inductance value.

Description

Technical Field

[0001] The present invention relates to an inductor, and more particularly to a chip E-type inductor. Background Art

[0002] With the rapid development of the electronic information industry, SMD electronic components are widely used, and SMD inductors are one of them.

[0003] Before mounting the inductor, you need to apply (or print) high-temperature softened solder paste on the solder joints of the PCB board, then contact the inductor pins with the solder paste and press the solder joints. After the solder paste cools and solidifies, the pins and solder joints can be fixed to complete the mounting of the inductor.

[0004] The inductance value of most existing chip inductors cannot be adjusted, so that the inductance value of the inductor cannot be adjusted according to actual usage conditions, and the application scope of such inductors is limited.

[0005] Therefore, it is necessary to design an adjustable inductor so that it can be suitable for different scenario requirements. Summary of the invention

[0006] In view of the shortcomings of the prior art, the object of the present invention is to provide a chip E-shaped inductor, whose inductance value can be freely adjusted and has a wide range of applications.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A patch E-type inductor comprises a skeleton, an E-shaped magnetic core and a pair of pins, wherein the skeleton comprises a detachable "C"-shaped upper frame and a lower frame, wherein the upper frame and the lower frame are arranged relative to each other so as to enclose and form a complete frame shape, wherein the magnetic core is fixed on the inner side of the upper frame, and the end of the magnetic core faces downward, and a vertical sleeve is arranged on the inner side of the lower frame and corresponding to the end of the magnetic core, wherein the lower end of the sleeve is connected and fixed to the lower frame, and the end of the magnetic core is inserted into the sleeve and can move up and down in the sleeve, and a The coil, the upper end of the pin is fixed to the bottom of the lower frame, the end of the coil is connected to the pin, the end of the upper frame is provided with a concave plug-in groove, and the upper frame is also provided with a vertical accommodating cavity, the accommodating cavity is communicated with the plug-in groove, a threaded column is installed in the accommodating cavity, the upper end of the threaded column passes through the top of the upper frame and is rotatably connected to the upper frame, and the end of the lower frame is provided with a plug-in column, the plug-in column is inserted into the plug-in groove, a threaded hole is opened in the center of the plug-in column, and the lower end of the threaded column is screwed into the threaded hole.

[0009] As a preferred solution: the number of the coils is three groups, namely coils L1, L2 and L3; a front groove is provided on the front of the lower frame, two groups of longitudinal paddles are symmetrically provided in the front groove, and the longitudinal paddles can slide up and down in the front groove; a front cover is provided on the front of the lower frame, the front cover presses the outer sides of the longitudinal paddles, and a conductive sliding sheet is provided on the contact surface of the longitudinal paddles; twelve contacts are provided in the groove, namely contacts A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11 and A12, wherein A1 and A5 are connected to one end of the coil L1, the other end of L1 is connected to the pin, and A9 is connected to the other end of L1; A2 and A10 are connected to one end of the coil L2, and A3 and A11 are connected to the other end of L2; A4 and A8 are connected to one end of the coil L3, A12 is connected to the other end of L3 and the other end is connected to another pin; A6 and A7 are connected and conducted; A1 and A2 are at the same level and flush with a set of longitudinal limit blocks; A5 and A6 are at the same level and flush with a set of longitudinal limit blocks; A9 and A10 are at the same level and flush with a set of longitudinal limit blocks; A1, A2, A5, A6, A9 and A10 are on the path where a set of longitudinal paddles slide up and down; A3 and A4 are at the same level and flush with a set of longitudinal limit blocks; A7 and A8 are at the same level and flush with a set of longitudinal limit blocks; A11 and A12 are at the same level and flush with a set of longitudinal limit blocks; A3, A4, A7, A8, A11 and A12 are on the path where another set of longitudinal paddles slide up and down.

[0010] As a preferred solution: vertical longitudinal guide strips are symmetrically arranged in the front groove and at both ends of the longitudinal paddle, and multiple groups of protruding longitudinal limit blocks are arranged at longitudinal intervals on one side of the longitudinal guide strip facing the longitudinal paddle, and each group of longitudinal limit blocks is aligned with each row of contacts, and an "M"-shaped longitudinal locking piece is fixed at the end of the longitudinal paddle, and the longitudinal limit block is snapped into the longitudinal locking piece.

[0011] As a preferred solution: a rear groove is provided on the back of the lower frame, a horizontal paddle is provided in the rear groove, and the horizontal paddle can slide left and right in the rear groove; a rear cover is provided on the back of the lower frame, and the rear cover presses the outer side of the horizontal paddle; six groups of contacts are provided in the rear groove and on the moving path of the horizontal paddle, namely contacts B1, B2, B3, B4, B5 and B6, wherein B1 and B5 are respectively connected to the two ends of the coil L2; B2 and B3 are respectively connected to the two ends of the coil L1; B4 and B6 are respectively connected to the two ends of the coil L3, and the horizontal paddle is Four groups of connecting pads are arranged on the contact surface. The first group of connecting pads are provided with conductive strips for contacting B3, B4, and B5, and conductive strips for contacting B1 and B2; the second group of connecting pads are provided with conductive strips for contacting B3, B4, and B5, and conductive strips for contacting B1, B2, and B6; the third group of connecting pads are provided with conductive strips for contacting B3, B4, and B5, and conductive strips for contacting B2 and B6; the fourth group of connecting pads are provided with conductive strips for contacting B3, B4, and B5, and conductive strips for contacting B1 and B6.

[0012] As a preferred solution: horizontal transverse guide strips are symmetrically arranged in the rear groove and at the top and bottom of the two ends of the transverse paddle, and multiple groups of protruding transverse limit blocks are arranged at lateral intervals on the side of the transverse guide strip facing the transverse paddle, and "M"-shaped transverse locking pieces are fixed at the top and bottom of the end of the transverse paddle, and the transverse limit blocks are snapped into the transverse locking pieces.

[0013] As a preferred solution: the longitudinal paddle includes a hollow shell, the interior of the shell is a cavity, and the contact surface of the shell is an open structure, the opening is connected to the cavity, the sliding piece is arranged in the opening, and a connecting piece and an elastic piece are arranged in the shell, the connecting piece can move back and forth in the cavity, the sliding piece is connected and fixed to the connecting piece, the elastic piece is arranged between the connecting piece and the inner wall of the shell, the elastic piece is in an extruded state, the elastic piece is used to push the connecting piece forward, and the sliding piece protrudes from the contact surface of the shell.

[0014] As a preferred solution: a longitudinal erasing strip for cleaning the contacts is arranged on the contact surface of the longitudinal paddle.

[0015] As a preferred solution: a transverse erasing strip for cleaning the contacts is arranged on the contact surface of the transverse paddle.

[0016] As a preferred solution: a through groove is provided on the side wall of the sleeve along its height direction.

[0017] Compared with the prior art, the advantages of the present invention are: the skeleton of the inductor is designed as a movable structure, and the distance between the magnetic core and the coil in the skeleton can be adjusted by twisting, so as to adjust the inductance value; in addition, the series-parallel connection mode of each group of coils can be changed by adjusting the paddle, and then the position of the magnetic core in the coil can be changed by twisting the knob, so as to achieve a more detailed and precise adjustment of the inductance value. The inductance value of the inductor can be adjusted within a certain range, which expands the application range of the inductor and makes it suitable for different application scenarios. And the adjustment operation is simple and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front cross-sectional view of the inductor in the first embodiment;

[0019] Figure 2 for Figure 1 A magnified view of part A in FIG.

[0020] Figure 3 for Figure 1 A magnified view of part B in FIG.

[0021] Figure 4 is a rear cross-sectional view of the inductor in the first embodiment;

[0022] Figure 5 is a schematic structural diagram of the contact surface of the horizontal paddle in the first embodiment;

[0023] Figure 6 is a wiring diagram of the inductor in the first embodiment;

[0024] Figure 7 It is a schematic diagram of the internal structure of the longitudinal paddle in the first embodiment;

[0025] Figure 8 is a schematic structural diagram of the contact surface of the horizontal paddle in the second embodiment;

[0026] Fig. 9 Schematic diagram of the structure of the operating surface of the longitudinal paddle in the second embodiment.

[0027] Explanation of the reference numerals: 1. upper frame; 2. lower frame; 3. magnetic core; 4. connecting bolt; 5. sleeve; 6. through slot; 7. coil; 8. pin; 9. bottom film; 10. plug-in slot; 11. plug-in column; 12. threaded hole; 13. accommodating cavity; 14. threaded column; 15. connecting seat; 16. knob; 17. front groove; 18. longitudinal guide strip; 19. longitudinal limit block; 20. longitudinal pick; 21. longitudinal position 1. Part; 22. Front contact; 23. Longitudinal operating protrusion; 24. Front cover; 25. Rear groove; 26. Horizontal paddle; 27. Horizontal operating protrusion; 28. Horizontal guide strip; 29. ​​Horizontal limit block; 30. Horizontal positioning part; 31. Back cover; 32. Connecting plate; 33. Conductive strip; 34. Cavity; 35. Sliding piece; 36. Connecting piece; 37. Elastic piece; 38. Horizontal erasing strip; 39. Vertical erasing strip. DETAILED DESCRIPTION

[0028] Embodiment 1:

[0029] Reference Figure 1 A chip E-type inductor includes a frame, an E-shaped magnetic core 3 and a pair of pins 8. The frame includes a detachable "C"-shaped upper frame 1 and a lower frame 2, and the upper frame 1 and the lower frame 2 are arranged relative to each other to form a complete frame shape.

[0030] The magnetic core 3 is located on the inner side of the upper frame 1. The magnetic core 3 is connected and fixed to the upper frame 1 by connecting bolts 4. The end of the magnetic core 3 faces downward. After removing the connecting bolts 4, the magnetic core 3 can be removed from the upper frame 1. A vertical sleeve 5 is provided on the inner side of the lower frame 2 and corresponding to the end of the magnetic core 3. The lower end of the sleeve 5 is connected and fixed to the lower frame 2. The end of the magnetic core 3 is inserted into the sleeve 5 and can move up and down in the sleeve 5. A coil 7 is wound on the outer wall of the sleeve 5.

[0031] In this embodiment, a through slot 6 is provided on the side wall of the sleeve 5 along its height direction. The through slot 6 can facilitate observation of the position of the magnetic core 3 in the sleeve 5 and is also conducive to rapid heat dissipation of the magnetic core 3 and the coil 7.

[0032] The upper end of the pin 8 is fixed to the bottom of the lower frame 2 , the lower end of the pin 8 is provided with a bottom sheet 9 for contacting with the soldering point, and the end of the coil 7 is connected to the pin 8 .

[0033] Reference Figure 2 A concave insertion groove 10 is provided at the end of the upper frame 1, and a vertical accommodating chamber 13 is also provided in the upper frame 1. The accommodating chamber 13 is communicated with the insertion groove 10. A freely rotatable threaded column 14 is installed in the accommodating chamber 13, and the upper end of the threaded column 14 passes upward from the top of the upper frame 1. A connecting seat 15 is installed at the top of the upper frame 1, and the upper end of the threaded column 14 is rotatably connected to the connecting seat 15. The lower end of the threaded column 14 has an external thread. A knob 16 is fixed at the upper end of the threaded column 14.

[0034] A plug-in column 11 is provided at the end of the lower frame 2, and the plug-in column 11 is used to be inserted into the plug-in slot 10, and the plug-in column 11 can move up and down in the plug-in slot 10. A threaded hole 12 is provided in the center of the plug-in column 11, and the lower end of the threaded column 14 is screwed into the threaded hole 12. By rotating the knob 16 to drive the threaded column 14 to rotate, the upper frame 1 can be driven away from or close to the lower frame 2. During this process, the magnetic core 3 moves synchronously with the upper frame 1. In this way, the position of the magnetic core 3 in the sleeve 5 can be changed, that is, the relative distance between the magnetic core 3 and the coil 7 is adjusted, so that the inductance value of the inductor can be adjusted. In this way, the inductance value of the inductor can be adjusted within a certain range, which expands the scope of application of the inductor and makes it suitable for different application scenarios. And the adjustment operation is simple and quick.

[0035] In this embodiment, the number of coils 7 is three groups, namely coils 7L1, L2 and L3.

[0036] Reference Figure 1 and Figure 3 A front groove 17 is provided on the front side of the lower frame 2, and a plurality of contacts are provided in the front groove 17, and the ends of the three groups of coils 7 are connected to their respective corresponding contacts.

[0037] Two groups of longitudinal paddles 20 are symmetrically arranged in the front groove 17 , and the longitudinal paddles 20 can slide up and down in the front groove 17 .

[0038] A vertical longitudinal guide strip 18 is symmetrically arranged in the front groove 17 and at both ends of the longitudinal paddle 20. A plurality of groups of protruding longitudinal limit blocks 19 are arranged at intervals along the longitudinal direction on the side of the longitudinal guide strip 18 facing the longitudinal paddle 20. An "M"-shaped longitudinal clamping piece 21 is fixed at the end of the longitudinal paddle 20. The longitudinal limit block 19 is clamped into the longitudinal clamping piece 21. A front cover plate 24 is arranged on the front of the lower frame 2, and the front cover plate 24 presses the outer side of the longitudinal paddle 20 to prevent the longitudinal paddle 20 from escaping from the front groove 17.

[0039] The "M"-shaped longitudinal clamping member 21 is elastic. When the longitudinal paddle 20 is moved upward or downward, the longitudinal limit block 19 squeezes the longitudinal clamping member 21, causing it to be squeezed and deformed. When the longitudinal clamping member 21 is separated from the longitudinal limit block 19, the longitudinal clamping member 21 returns to its original shape under the action of elastic force. When the longitudinal clamping member 21 contacts the next longitudinal limit block 19, it will be squeezed again until the longitudinal limit block 19 is completely inserted into the longitudinal clamping member 21. Such a structure allows the longitudinal paddle 20 to move stably when it is moved up and down, ensuring that it can move accurately and remain in each gear position; and there is clear vibration feedback when it is moved up and down, which is convenient for operation.

[0040] In order to facilitate the movement of the longitudinal paddle 20 , a longitudinal operating protrusion 23 is provided on the outer side of the longitudinal paddle 20 .

[0041] Reference Figure 6 , twelve contacts are arranged in the front groove 17, namely contacts A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11 and A12. Among them, A1 and A5 are connected to one end of the coil 7L1, the other end of L1 is connected to pin 8, and A9 is connected to the other end of L1; A2 and A10 are connected to one end of the coil 7L2, A3 and A11 are connected to the other end of L2; A4 and A8 are connected to one end of the coil 7L3, A12 is connected to the other end of L3 and the end is connected to another pin 8; A6 is connected to A7 for conduction.

[0042] A1 and A2 are at the same level and are flush with a set of longitudinal limit blocks 19; A5 and A6 are at the same level and are flush with a set of longitudinal limit blocks 19; A9 and A10 are at the same level and are flush with a set of longitudinal limit blocks 19; A1, A2, A5, A6, A9, and A10 are located on a path where a set of longitudinal paddles 20 slide up and down.

[0043] A3 and A4 are at the same level and are flush with a set of longitudinal limit blocks 19; A7 and A8 are at the same level and are flush with a set of longitudinal limit blocks 19; A11 and A12 are at the same level and are flush with a set of longitudinal limit blocks 19; A3, A4, A7, A8, A11, and A12 are located on the path where another set of longitudinal paddles 20 slide up and down.

[0044] Conductive slides 35 are provided on the contact surfaces of the two groups of longitudinal paddles 20 along their length direction, and the slides 35 are used to contact the front contacts 22. When the longitudinal paddles 20 slide to a certain position, the two groups of contacts at the height position are connected and conducted, so that the two groups of coils 7 can be connected.

[0045] When one group of longitudinal paddles 20Z1 is moved to contact A1 and A2, and the other group of longitudinal paddles 20Z2 is moved to contact A3 and A4, the coils 7L1, L2, and L3 are connected in series in sequence; when Z1 is moved to contact A1 and A2, and Z2 is moved to contact A11 and A12, the coil 7L1 is connected in series with L2, and L3 does not work; when Z1 is moved to contact A5 and A6, and Z2 is moved to contact A7 and A8, the coil 7L1 is connected in series with L3, and L2 does not work; when Z1 is moved to contact A9 and A10, and Z2 is moved to contact A3 and A4, the coil 7L2 is connected in series with L3, and L1 does not work. In this way, the series connection mode of the three groups of coils 7 can be changed by turning the paddle, so that the inductor has several inductance values, and then the position of the magnetic core 3 in the coil 7 can be changed by turning the knob 16, so that the inductance value can be adjusted more finely and accurately.

[0046] Reference Figure 4In this embodiment, a rear groove 25 is also provided on the back side of the lower frame body 2 , and a plurality of contacts are provided in the rear groove 25 .

[0047] A transverse paddle 26 is disposed in the rear groove 25 , and the transverse paddle 26 can slide left and right in the rear groove 25 .

[0048] Horizontal transverse guide bars 28 are symmetrically arranged at the top and bottom of both ends of the transverse paddle 26 in the rear groove 25, and multiple groups of protruding transverse stop blocks 29 are arranged at intervals along the transverse direction on the side of the transverse guide bar 28 facing the transverse paddle 26. An "M"-shaped transverse stopper 30 is fixed at the top and bottom of the end of the transverse paddle 26. The transverse stopper 29 is inserted into the transverse stopper 30. A back cover plate 31 is arranged on the back of the lower frame 2, and the back cover plate 31 presses the outer side of the transverse paddle 26 to prevent the transverse paddle 26 from escaping from the rear groove 25.

[0049] In order to facilitate the movement of the transverse paddle 26 , a transverse operating protrusion 27 is provided on the outer side of the transverse paddle 26 .

[0050] Referring to Figure 6, six groups of contacts are provided in the rear groove 25 and on the moving path of the horizontal paddle 26, namely contacts B1, B2, B3, B4, B5 and B6. Among them, B1 and B5 are connected to the two ends of the coil 7L2 respectively; B2 and B3 are connected to the two ends of the coil 7L1 respectively; B4 and B6 are connected to the two ends of the coil 7L3 respectively.

[0051] Reference Figure 5 Four groups of connection plates 32 are arranged on the contact surface of the horizontal paddle 26, and the first group of connection plates 32 is provided with conductive strips 33 for contacting B3, B4, and B5, and conductive strips 33 for contacting B1 and B2; the second group of connection plates 32 is provided with conductive strips 33 for contacting B3, B4, and B5, and conductive strips 33 for contacting B1, B2, and B6; the third group of connection plates 32 is provided with conductive strips 33 for contacting B3, B4, and B5, and conductive strips 33 for contacting B2 and B6; the fourth group of connection plates 32 is provided with conductive strips 33 for contacting B3, B4, and B5, and conductive strips 33 for contacting B1 and B6.

[0052] When the first group of connection disks 32 moves to the area where the contacts are located, B3, B4, and B5 are connected and conducted, and B1 and B2 are connected and conducted, at this time, the coil 7L1 is connected in parallel with L2, and the coil 7L3 is not put into operation; when the second group of connection disks 32 moves to the area where the contacts are located, B3, B4, and B5 are connected and conducted, and B1, B2, and B6 are connected and conducted, at this time, the coils 7L1, L2, and L3 are connected in parallel; when the third group of connection disks 32 moves to the area where the contacts are located, B3, B4, and B5 are connected and conducted, and B2 and B6 are connected and conducted, at this time, the coils 7L1 and L3 are connected in parallel, and the coil 7L2 is not put into operation; when the fourth group of connection disks 32 moves to the area where the contacts are located, B3, B4, and B5 are connected and conducted, and B1 and B26 are connected and conducted, at this time, the coil 7L2 is connected in parallel with L3, and the coil 7L1 is not put into operation.

[0053] In this way, the parallel connection mode of the three groups of coils 7 can be changed by toggling the horizontal paddle 26, making the adjustment of the inductor more flexible and changeable.

[0054] Reference Figure 7 In this embodiment, the longitudinal paddle 20 includes a hollow shell, the interior of the shell is a cavity 34, and the contact surface of the shell is an open structure, the opening is connected to the cavity 34, a slide 35 is arranged in the opening, a connecting piece 36 and an elastic piece 37 are arranged in the shell, the connecting piece 36 can move back and forth in the cavity 34, the slide 35 is fixedly connected to the connecting piece 36, the elastic piece 37 is arranged between the connecting piece 36 and the inner wall of the shell, the elastic piece 37 is in an extruded state, and the elastic piece 37 is used to push the connecting piece 36 forward; the slide 35 protrudes from the contact surface of the shell.

[0055] Such a structure enables the elastic sheet 37 to push the sliding sheet 35 forward. When the sliding sheet 35 contacts the contact point, the elastic sheet 37 pushes the sliding sheet 35 so that the sliding sheet 35 contacts the contact point closely, thereby avoiding poor contact.

[0056] Similarly, in this embodiment, the connection plate 32 is made of elastic material, so that it has a certain elasticity. When the conductive strip 33 contacts the contact point, the connection plate 32 pushes the conductive strip 33 forward to make it contact closely with the contact point.

[0057] Embodiment 2:

[0058] Reference Figure 8 In this embodiment, a horizontal erasing strip 38 is provided on the contact surface of the horizontal paddle 26. When the horizontal paddle 26 is toggled, the horizontal erasing strip 38 can sweep across the contact surface to wipe off the dust on the contact surface, thereby playing a cleaning role and preventing dust from affecting the contact between the conductive strip 33 and the contact.

[0059] Similarly, refer to Fig. 9 A longitudinal erasing strip 39 is provided on the contact surface of the longitudinal paddle 20 .

[0060] In this embodiment, the horizontal erasing strip 38 and the vertical erasing strip 39 are both made of sponge material.

[0061] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A chip E-type inductor, comprising a skeleton, an E-shaped magnetic core and a pair of pins, characterized in that: The skeleton includes a detachable "C"-shaped upper frame and a lower frame, the upper frame and the lower frame are arranged relative to each other to enclose a complete frame shape, the magnetic core is fixed on the inner side of the upper frame, the end of the magnetic core faces downward, and a vertical sleeve is arranged on the inner side of the lower frame and corresponding to the end of the magnetic core, the lower end of the sleeve is connected and fixed to the lower frame, the end of the magnetic core is inserted into the sleeve and can move up and down in the sleeve, a coil is wound on the outer wall of the sleeve, the upper end of the pin is fixed to the bottom of the lower frame, the end of the coil is connected to the pin, the end of the upper frame is provided with a concave plug-in groove, and a vertical accommodating cavity is also provided in the upper frame, the accommodating cavity is communicated with the plug-in groove, a threaded column is installed in the accommodating cavity, the upper end of the threaded column passes through the top of the upper frame and is rotatably connected to the upper frame, A plug-in column is provided at the end of the lower frame, and the plug-in column is inserted into the plug-in groove. A threaded hole is provided in the center of the plug-in column, and the lower end of the threaded column is screwed into the threaded hole; the number of the coils is three groups, namely coils L1, L2 and L3, and a front groove is provided at the front of the lower frame, and two groups of longitudinal paddles are symmetrically provided in the front groove, and the longitudinal paddles can slide up and down in the front groove, and a front cover plate is provided at the front of the lower frame, and the front cover plate presses the outer side of the longitudinal paddle, and a conductive sliding plate is provided on the contact surface of the longitudinal paddle, and twelve contacts are provided in the groove, namely contacts A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11 and A12, wherein A1 and A5 are connected to one end of the coil L1, the other end of L1 is connected to the pin, and A9 is connected to the other end of L1; A2 and A10 are connected to the coil One end of L2 is connected, and A3 and A11 are connected to the other end of L2; A4 and A8 are connected to one end of coil L3, A12 is connected to the other end of L3 and the end is connected to another pin; A6 and A7 are connected and turned on; A1 and A2 are at the same horizontal height and are flush with a group of longitudinal limit blocks; A5 and A6 are at the same horizontal height and are flush with a group of longitudinal limit blocks; A9 and A10 are at the same horizontal height and are flush with a group of longitudinal limit blocks; A1, A2, A5, A6, A9, and A10 are on the path where a group of longitudinal paddles slide up and down; A3 and A4 are at the same horizontal height and are flush with a group of longitudinal limit blocks; A7 and A8 are at the same horizontal height and are flush with a group of longitudinal limit blocks; A11 and A12 are at the same horizontal height and are flush with a group of longitudinal limit blocks; A3, A4, A7, A8, A11, and A12 are on the path where another group of longitudinal paddles slide up and down.

2. The chip E-type inductor according to claim 1, characterized in that: Vertical longitudinal guide strips are symmetrically arranged in the front groove and at both ends of the longitudinal paddle. A plurality of groups of protruding longitudinal limit blocks are arranged at longitudinal intervals on one side of the longitudinal guide strip facing the longitudinal paddle, and each group of longitudinal limit blocks is aligned with each row of contacts. An "M"-shaped longitudinal retaining piece is fixed at the end of the longitudinal paddle, and the longitudinal limit block is snapped into the longitudinal retaining piece.

3. The chip E-type inductor according to claim 1, characterized in that: A rear groove is provided on the back of the lower frame, and a horizontal paddle is provided in the rear groove. The horizontal paddle can slide left and right in the rear groove. A rear cover is provided on the back of the lower frame, and the rear cover presses the outer side of the horizontal paddle. Six groups of contacts are provided in the rear groove and on the moving path of the horizontal paddle, namely contacts B1, B2, B3, B4, B5 and B6, wherein B1 and B5 are respectively connected to the two ends of the coil L2; B2 and B3 are respectively connected to the two ends of the coil L1; B4 and B6 are respectively connected to the two ends of the coil L3, and the contact surface of the horizontal paddle Four groups of connection disks are provided. The first group of connection disks is provided with conductive strips for contacting B3, B4, and B5, and conductive strips for contacting B1 and B2; the second group of connection disks is provided with conductive strips for contacting B3, B4, and B5, and conductive strips for contacting B1, B2, and B6; the third group of connection disks is provided with conductive strips for contacting B3, B4, and B5, and conductive strips for contacting B2 and B6; the fourth group of connection disks is provided with conductive strips for contacting B3, B4, and B5, and conductive strips for contacting B1 and B6.

4. The chip E-type inductor according to claim 3, characterized in that: Horizontal transverse guide strips are symmetrically arranged in the rear groove and at the top and bottom of the two ends of the transverse paddle. A plurality of groups of protruding transverse limit blocks are arranged at lateral intervals on the side of the transverse guide strip facing the transverse paddle. "M"-shaped transverse locking pieces are fixed at the top and bottom of the end of the transverse paddle, and the transverse limit blocks are snapped into the transverse locking pieces.

5. The chip E-type inductor according to claim 1, characterized in that: The longitudinal paddle includes a hollow shell, the interior of the shell is a cavity, and the contact surface of the shell is an open structure, the opening is connected to the cavity, the sliding piece is arranged in the opening, the shell is provided with a connecting piece and an elastic piece, the connecting piece can move back and forth in the cavity, the sliding piece is connected and fixed to the connecting piece, the elastic piece is arranged between the connecting piece and the inner wall of the shell, the elastic piece is in an extruded state, the elastic piece is used to push the connecting piece forward, and the sliding piece protrudes from the contact surface of the shell.

6. The chip E-type inductor according to claim 1, characterized in that: A longitudinal erasing strip for cleaning the contacts is arranged on the contact surface of the longitudinal paddle.

7. The chip E-type inductor according to claim 3, characterized in that: A transverse erasing strip for cleaning contacts is arranged on the contact surface of the transverse paddle.

8. The chip E-type inductor according to claim 1, characterized in that: A through groove is provided on the side wall of the sleeve along the height direction thereof.

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