Calibration, ear impression scanning abutment ac power electromagnetic positioning structure

Abstract

The application discloses a self-rectifying device, which comprises a rotating table assembly, a swing arm, a dynamic connecting piece and a static connecting piece, the static connecting piece is fixedly connected to the swing arm, the rotating table assembly drives the dynamic connecting piece to rotate, an L-pole conductive ring and an N-pole conductive ring in a semi-ring shape are arranged on the static connecting piece and are connected with the L-pole and the N-pole of alternating current respectively, and a positive conductive elastic contact and a negative conductive elastic contact are arranged on the dynamic connecting piece. When the positive conductive elastic contact is in contact with the L-pole conductive ring, the negative conductive elastic contact is in contact with the N-pole conductive ring; when the dynamic connecting piece rotates by half a circle, the positive conductive elastic contact is in contact with the N-pole conductive ring, and the negative conductive elastic contact is in contact with the L-pole conductive ring; the rotating circle number of the rotating table assembly in a unit time is the same as the period of the alternating current. The application further provides a calibration, earprint mold scanning base station alternating current power supply electromagnetic positioning structure.

Description

TECHNICAL FIELD

[0001] The present application relates to a self-rectifying device and a calibration, ear impression scanning base station alternating current power supply electromagnetic positioning structure comprising the same, and belongs to the field of acoustic processing equipment. BACKGROUND

[0002] Please refer to the patent with application number CN202222260703.0, which discloses a calibration, ear impression scanning base station alternating current power supply electromagnetic positioning structure. The electromagnetic positioning structure works using direct current. The magnetic force of the electromagnet is closely related to the voltage of the direct current. How to provide stable voltage direct current for the calibration, ear impression scanning base station alternating current power supply electromagnetic positioning structure with a self-rectifying device is a technical problem that technicians in the field need to solve. SUMMARY

[0003] In order to overcome the above-mentioned shortcomings, the purpose of the present application is to provide a calibration, ear impression scanning base station alternating current power supply electromagnetic positioning structure with a self-rectifying device.

[0004] In order to achieve the above purpose, the technical solution adopted by the present application is: a self-rectifying device, comprising a turntable assembly, a swing arm, a dynamic terminal lug and a static terminal lug, the static terminal lug being fixedly connected to the swing arm, the turntable assembly driving the dynamic terminal lug to rotate, the dynamic terminal lug being above the static terminal lug, the static terminal lug being provided with a semi-ring-shaped L pole conductive ring and an N pole conductive ring, the L pole conductive ring and the N pole conductive ring being centrally symmetrically located on a virtual circular ring and being connected with the L pole and the N pole of alternating current respectively; the dynamic terminal lug is provided with a positive pole conductive elastic contact and a negative pole conductive elastic contact, the positive pole conductive elastic contact and the negative pole conductive elastic contact being centrally symmetrically arranged; when the positive pole conductive elastic contact contacts the L pole conductive ring, the negative pole conductive elastic contact contacts the N pole conductive ring; when the positive pole conductive elastic contact contacts the N pole conductive ring, the negative pole conductive elastic contact contacts the L pole conductive ring; the number of rotations of the turntable assembly per unit time is the same as the period of the alternating current.

[0005] The present application also provides a calibration, ear impression scanning base station alternating current power supply electromagnetic positioning structure, which comprises the self-rectifying device described above.

[0006] Compared with the prior art, the present application has the beneficial effects that the positive conductive elastic contact is in contact with the L-pole conductive ring when the negative conductive elastic contact is in contact with the N-pole conductive ring; after the movable terminal lug rotates by half a circle, the positive conductive elastic contact is in contact with the N-pole conductive ring when the negative conductive elastic contact is in contact with the L-pole conductive ring; the number of rotations of the rotating table assembly per unit time is the same as the period of the alternating current. Thus, the positive conductive elastic contact is always electrically connected with the upper half cycle of the alternating current, and the negative conductive elastic contact is always electrically connected with the lower half cycle of the alternating current; the electromotive force of the positive conductive elastic contact is higher than that of the negative conductive elastic contact. The alternating current forms direct current after passing through the self-rectifying device, serving as the power supply of the electromagnetic positioning structure of the calibration, earprint mold scanning base station. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a bottom view of the calibration assembly;

[0008] Figure 2 is a side view of the calibration assembly;

[0009] Figure 3 is a top view of the pin assembly;

[0010] Figure 4 is a bottom view of the pin assembly

[0011] Figure 5 is a sectional view along Figure 4 line AA;

[0012] Figure 6 is a structural schematic view of the universal base station sleeve;

[0013] Figure 7 is a top view of the armature;

[0014] Figure 8 is a sectional view along Figure 7 line BB;

[0015] Figure 9 is a top view of the sliding table;

[0016] Figure 10 is a sectional view along Figure 9 line CC;

[0017] Figure 11 is a bottom view of the sliding table;

[0018] Figure 12 is a structural schematic view of the assembly of the universal base station sleeve and the calibration assembly;

[0019] Figure 13 is a structural schematic view of the assembly of the universal base station sleeve, the calibration assembly, the armature and the sliding table;

[0020] Figure 14Assembling structure schematic diagram of general base sleeve and scanning assembly;

[0021] Figure 15 Assembling structure schematic diagram of general base sleeve, scanning assembly, armature and sliding table;

[0022] Figure 16 Top view of rotating table sleeve;

[0023] Figure 17 Structure schematic diagram of rotating table sleeve;

[0024] Figure 18 Bottom view of rotating table sleeve;

[0025] Figure 19 Bottom view of iron core;

[0026] Figure 20 Sectional view along Figure 19 DD line;

[0027] Figure 21 Sectional view of framework;

[0028] Figure 22 Top view of rotating table body;

[0029] Figure 23 Sectional view along Figure 22 EE line;

[0030] Figure 24 Bottom view of rotating table body;

[0031] Figure 25 Structure schematic diagram of static contact piece;

[0032] Figure 26 Structure schematic diagram of dynamic contact piece;

[0033] Figure 27 Assembling diagram of rotating table sleeve, rotating table body, framework, electromagnetic coil, static contact piece, dynamic contact piece and motor.

[0034] In the figure: 1, dynamic contact piece; 102, third through hole; 103, positive conductive elastic contact; 104, isolation diode; 105, capacitor; 106, negative conductive elastic contact;

[0035] 111, motor; 121, swing arm; 10, static contact piece; 11, calibration base plate; 12, calibration base; 13, first screw hole;

[0036] 21, pin base; 22, second screw hole; 23, reinforcing sheet; 24, positioning pin;

[0037] 3, general base sleeve; 31, first countersunk through hole; 32, base sleeve inner cavity; 33, first internal thread; 34, first countersunk screw;

[0038] 41, body; 42, convex column; 43, second countersunk hole; 44, second countersunk screw;

[0039] 5, sliding table; 51, first external thread; 52, sliding table through hole; 53, sliding rail; 54, assembly hole;

[0040] 6, rotary table sleeve; 61, rotary table sleeve side wall; 62, second internal thread; 63, rotary table inner cavity; 64, center through hole; 65, sliding groove;

[0041] 71, core base; 72, cylindrical core; 73, third countersunk hole; 74, first lead sheath through hole; 75, framework through hole; 76, framework; 77, lead sheath; 78, coil; 79, third countersunk screw;

[0042] 81, lower part; 82, rotary table body; 83, limiting shoulder; 84, second external thread; 85, shaft hole; 86, radial hole; 87, second lead sheath through hole; 88, internal thread blind hole; 89, set screw;

[0043] 91, solder pad; 92, first through hole; 93, L pole conductive ring; 94, N pole conductive ring; 95, insulating piece. DETAILED DESCRIPTION

[0044] The advantages and features of the present application will be more easily understood by those skilled in the art from the detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings, so as to make the scope of protection of the present application more clear and explicit.

[0045] Referring to the accompanying drawings Figures 1-26 As shown in the drawings, the self-rectifying device in the embodiment includes a rotary table assembly, a swing arm 121, a movable terminal lug 1 and a stationary terminal lug 10, the stationary terminal lug 10 is fixedly connected to the swing arm 121, the rotary table assembly drives the movable terminal lug 1 to rotate, the movable terminal lug 1 is above the stationary terminal lug 10, the stationary terminal lug 10 is provided with a semi-annular L pole conductive ring 93 and a semi-annular N pole conductive ring 94, the L pole conductive ring 93 and the N pole conductive ring 94 are centrally symmetrically arranged on a virtual annular ring and are respectively connected to the L pole and the N pole of alternating current; the movable terminal lug 1 is provided with a positive pole conductive elastic contact 103 and a negative pole conductive elastic contact 106, the positive pole conductive elastic contact 103 and the negative pole conductive elastic contact 106 are centrally symmetrically arranged; when the positive pole conductive elastic contact 103 contacts the L pole conductive ring 93, the negative pole conductive elastic contact 106 contacts the N pole conductive ring 94; when the positive pole conductive elastic contact 103 contacts the N pole conductive ring 94, the negative pole conductive elastic contact 106 contacts the L pole conductive ring 93; the number of rotations of the rotary table assembly per unit time is the same as the period of the alternating current.

[0046] When the rotation speed of the rotating table assembly increases or decreases, alternating current will still be formed between the positive conductive elastic contact 103 and the negative conductive elastic contact 106. In order to maintain the supply of direct current, further, the rectifier device is used to supply power to the electrical equipment; the positive conductive elastic contact 103 and the negative conductive elastic contact 106 are connected with the positive electrode and the negative electrode of the electrical equipment, and the isolation diode 104 is connected in series between the positive conductive elastic contact 103 and the electrical equipment. The isolation diode 104 will filter out the alternating current between the positive conductive elastic contact 103 and the negative conductive elastic contact 106, and retain the direct current.

[0047] In order to prevent the occurrence of arc and flying fire between the L-pole conductive ring 93 and the N-pole conductive ring 94, further, a pair of insulating pieces 95 are connected on the fixed terminal lug, the pair of insulating pieces 95 are respectively arranged between the end point of the L-pole conductive ring 93 and the end point of the N-pole conductive ring 94, and the top surface of the insulating piece 95 is flush with the surface of the L-pole conductive ring 93 and the N-pole conductive ring 94. The positive conductive elastic contact 103 and the negative conductive elastic contact 106 can smoothly slide, and the phenomenon of jamming, plugging or jumping will not occur.

[0048] In order to maintain the potential difference between the positive conductive elastic contact 103 and the negative conductive elastic contact 106 stable, eliminate the electric peak and valley, the capacitor 105 is connected between the positive conductive elastic contact 103 and the negative conductive elastic contact 106.

[0049] The first through hole 92 is arranged at the center of the static terminal lug 10, the second through hole is arranged on the upper surface of the swing arm 121, and the third through hole 102 is arranged at the center of the movable terminal lug. The first through hole 92 overlaps with the second through hole; the static terminal lug 10 is fixedly connected to the upper surface of the swing arm 121, and the rotating table assembly drives the movable terminal lug 1 to rotate through the first through hole 92 and the second through hole.

[0050] The application also provides a calibration and earprint scanning base station alternating current power supply electromagnetic positioning structure, which comprises a rectifier device.

[0051] The calibration, ear impression scanning base station alternating current power supply electromagnetic positioning structure further comprises a calibration assembly or pin assembly, a universal base station sleeve 3, and a sliding table 5. The lower surface of the calibration assembly or pin assembly is provided with a plurality of screw holes. The universal base station sleeve 3 is in the shape of an inverted cup and has a base station sleeve inner cavity 32. The side wall of the base station sleeve inner cavity 32 is provided with a first internal thread 33, and the bottom is provided with a plurality of first countersunk holes 31. The universal base station sleeve 3 is connected with the calibration assembly or pin assembly through first countersunk screws 34. The first countersunk screws 34 pass through the first countersunk holes 31 and are screwed with the screw holes. The top end of the turntable assembly is provided with an arc-shaped sliding groove 65. The sliding table 5 is in the shape of a cylinder and has a sliding table through hole 52 in the center. The edge is provided with a plurality of assembly holes 54. The lower surface is connected with an arc-shaped sliding rail 53. The upper surface is tightly connected with an armature. The side surface is provided with a first external thread 51 which is screwed with the first internal thread 33. The sliding rail 53 and the sliding groove 65 are matched and fitted in shape. The sliding rail 53 is inserted into the sliding groove 65. The electric device is an electromagnet. The electromagnet is arranged in the turntable assembly. The electromagnet attracts the armature.

[0052] The armature comprises a body 41 in the shape of a cylinder and a convex column 42. The radius of the convex column 42 is smaller than that of the body 41. The edge of the body is provided with a plurality of second countersunk holes 43. The middle part of the sliding table 5 is provided with a sliding table through hole 52. The convex column 42 extends into the sliding table through hole 52. The armature is connected with the universal base station sleeve 3 through second countersunk screws 44. The second countersunk screws 44 pass through the second countersunk holes 43 and are screwed with the universal base station sleeve 3.

[0053] The turntable assembly further comprises a turntable sleeve 6 and a turntable body 82. The turntable sleeve 6 is in the shape of an inverted cup. The top of the turntable sleeve 6 is provided with a central through hole 64. The turntable sleeve 6 has a turntable inner cavity 63. The electromagnet is arranged in the turntable inner cavity 63. The side wall 61 of the turntable sleeve is provided with a second internal thread 62. The sliding groove 65 is arranged on the top surface of the top of the turntable sleeve 6. The turntable body 82 comprises an upper part and a lower part. The lower end side surface of the upper part is connected with a limiting shoulder 83. The side surface of the upper part is provided with a second external thread 84 which is screwed with the second internal thread 62. The lower part 81 penetrates the first through hole 92 and the second through hole. The middle axis of the lower part is provided with a shaft hole 85. The output shaft of the motor 111 is inserted into the shaft hole 85. The radial direction of the lower part is provided with a radial hole 86 which is perpendicular to the shaft hole 85. The radial hole 86 is screwed with a set screw 89. The top end of the set screw 89 abuts against the output shaft of the motor 111. The turntable sleeve 6 covers the outside of the electromagnet. The turntable sleeve 6 not only supports the electromagnet but also protects the electromagnet from being hit.

[0054] The electromagnet includes an "I"-shaped frame 76, with a coil 78 wound around the center of the frame 76. Through holes 75 are arranged around the central axis of the frame 76. A cylindrical iron core 72 is disposed within the through holes 75 of the frame 76. The lower end of the cylindrical iron core 72 is connected to an iron core base 71, which is connected to the upper part. Several third countersunk holes 73 are formed on the edge of the iron core base 71. The iron core base is connected to the upper part by third countersunk screws 7979, which pass through the third countersunk holes 73 and are screwed into the internal blind holes 88 of the turntable body 82.

[0055] The coil 78 is connected to a lead wire that is electrically connected to the positive conductive elastic contact 103 and the negative conductive elastic contact 106; a plurality of lead wire sheaths 77 are provided on the lower end of the frame 76, and the lead wires pass through the lead wire sheaths 77; a first lead wire sheath through hole 74 is provided on the edge of the iron core chassis 71; a second lead wire sheath through hole 87 is provided on the upper part, and the lead wire sheaths 77 pass through the first lead wire sheath through hole 74 and the second lead wire sheath through hole 87 in sequence.

[0056] Motor 111 is fixedly connected to swing arm 121; moving connector 1 is connected to the lower surface of turntable.

[0057] The calibration assembly includes a calibration substrate 11 and a calibration base 12. The calibration base 12 is connected to the lower surface of the calibration substrate 11. The calibration base 12 is provided with a plurality of first screw holes 13. First countersunk screws 34 pass through the first countersunk holes 31 and are screwed into the first screw holes 13.

[0058] The pin assembly includes a pin base 21, a reinforcing plate 23, and a positioning pin 24. The lower surface of the pin base 21 is provided with a plurality of second screw holes 22. A first countersunk screw 34 passes through the first countersunk hole 31 and is screwed into the second screw holes 22.

[0059] The slide table 5 has several through assembly process holes, which are located on the outside of the slide rail 53. By prying open the assembly process holes, the slide table 5 can be easily and quickly assembled or disassembled.

[0060] In summary, the self-rectifying device and the use method of the AC power supply electromagnetic positioning structure of the calibration and earprint scanning base station shown in the present application are as follows: the motor 111 drives the rotation of the turntable assembly, and the movable terminal lug 1 connected with the turntable assembly rotates accordingly; the number of rotations of the movable terminal lug 1 in a unit time is the same as the period of the AC power. When the positive conductive elastic contact 103 is in contact with the L-pole conductive ring 93, the negative conductive elastic contact 106 is in contact with the N-pole conductive ring 94; after the movable terminal lug 1 rotates by half a circle, when the positive conductive elastic contact 103 is in contact with the N-pole conductive ring 94, the negative conductive elastic contact 106 is in contact with the L-pole conductive ring 93. Thus, the positive conductive elastic contact 103 is always electrically connected with the upper half cycle of the AC power, and the negative conductive elastic contact 106 is always electrically connected with the lower half cycle of the AC power; the electromotive force of the positive conductive elastic contact 103 is higher than that of the negative conductive elastic contact 106. The AC power forms DC power after passing through the self-rectifying device, and the DC power is used to supply power to the electromagnet. The static terminal lug 10 and the movable terminal lug 1 are made of insulating materials; the L-pole conductive ring 93 and the N-pole conductive ring 94 are both connected with a solder pad 91, and the AC power supply is directly connected through the solder pad 91.

[0061] In one cycle, the AC power is positive half cycle from 0 to 180°, and is negative half cycle from 180 to 360°, and changes continuously according to the sine law. The L-pole of the AC power is introduced from the L-pole conductive ring 93 of the static terminal lug 10, and the positive conductive elastic contact 103 on the movable terminal lug 1 slides to the starting end of the L-pole conductive ring 93, and continues to slide to the terminal end along the L-pole conductive ring 93 in the upper half cycle, and the current flows into the positive pole of the electromagnetic coil 78 through the introduction of the positive conductive elastic contact 103 and the isolation diode 104, and then flows out from the negative pole of the electromagnetic coil 78, and is introduced into the N-pole of the AC power through the negative conductive elastic contact 106 and the N-pole conductive ring 94, and the loop is completed. With the rotation of the turntable assembly by 180°, the AC power enters the lower half cycle. The negative conductive elastic contact 106 on the movable terminal lug 1 rotates to the starting end of the L-pole conductive ring 93 and reliably contacts with the starting end, and slides to the terminal end of the L-pole conductive ring 93 in the half cycle; the positive conductive elastic contact 103 correspondingly rotates to the starting end of the N-pole conductive ring 94 and reliably contacts with the starting end, and continues to slide to the terminal end of the N-pole conductive ring 94 along the N-pole conductive ring 94 in the half cycle, and at this time, the N-pole of the AC power is positive. The positive conductive elastic contact 103 reliably contacts with the N-pole conductive ring 94 of the static terminal lug 10 and flows into the positive pole of the electromagnetic coil 78, and then flows out from the negative pole of the electromagnetic coil 78, and is introduced into the L-pole conductive ring 93 on the static terminal lug 10 by the negative conductive elastic contact 106 to return to the L-pole to form a loop. This is repeated. In the whole cycle, the current always flows into the positive pole of the electromagnetic coil 78, flows through the whole electromagnetic coil 78, and then flows out from the negative pole, and always maintains a direction of flow. From the definition of DC power: the direction of current of the DC power always does not change. It can be known that the self-rectifying device has successfully converted the AC power into DC power.

[0062] Although the platform is driven by motor 111 synchronous rotation, but the structure of the rectifier device and isolation diode 104 determines that whether the motor 111 speed, will be AC rectified into DC. And the characteristics of DC: its current direction is always unchanged, regardless of frequency. In addition, can not be ignored, after the rectification is not pure DC, but the pulsating DC, still contains AC component. And the electromagnetic coil 78 is pure inductive nature, after adding capacitor 105, lagging, leading two-phase cancellation, play a smoothing filter effect, help to stabilize the voltage. With compensation, no doubt can improve the efficiency of the power supply. Electromagnetic coil 78 input end is provided with isolation diode 104, to ensure that only the forward current flows into the electromagnetic coil 78.

[0063] The armature is first placed in the universal base sleeve 3, and the second countersunk screw 44 is screwed through the second countersunk hole 43 and the universal base sleeve 3. The lower surface of the sliding table 5 is connected with the circular arc sliding rail 53, and the upper surface is tightly connected with the armature. The first external thread 51 of the sliding table 5 is screwed with the first internal thread 33 of the universal base sleeve 3. The sliding rail 53 faces outward.

[0064] When the electromagnet attracts the armature, the sliding rail 53 automatically inserts into the sliding groove 65, and when the front end of the sliding rail 53 abuts against the bottom end of the sliding groove 65, it is assembled in place. The scanning assembly or calibration assembly connected with the universal base sleeve 3 is exactly in the preset position. It uses the slope principle, and the sliding rail 53 can only slide along the sliding groove 65, which is labor-saving, convenient and efficient. It is simple and convenient to assemble and disassemble.

[0065] The H-shaped coil 78 skeleton 76 is wound with the electromagnetic coil 78. The coil 78 lead is drawn out from the lead sheath 77 of the skeleton 76. The lead sheath 77 passes through the lead sheath 77 perforation pre-set in the iron core and the rotating table body 82. The rotating table body 82 is rotated into the rotating table sleeve 6 at the upper end, and the second external thread 84 is screwed with the second internal thread 62. The rotating table sleeve 6 is screwed and stopped at the limiting shoulder 83. The center hole of the movable terminal piece 1 is sleeved into the lower end of the rotating table body 82, which is fixed on the lower end of the upper part of the rotating table body 82. The two leads of the electromagnetic coil 78 are drawn out from the lead sheath 77 of the skeleton 76 and welded on the positive and negative conductive elastic contacts 103 and 106, respectively. The first through hole 92 of the static terminal piece 10 is aligned with the second through hole on the swing arm 121. The lead wires drawn from the L pole conductive ring 93 and the N pole conductive ring 94 are directly connected with alternating current. The shaft of the motor 111 passes through the second through hole and the first through hole 92 and penetrates into the shaft hole 85 of the rotating table body 82. Then it is fixed with the set screw 89. The assembled rotating table sleeve 6 is screwed with the rotating table body 82 and stopped at the limiting shoulder 83. The iron core bottom plate 71 is tightly connected with the coil 78 skeleton 76. The top end surface of the iron core cylindrical core body is flush with the top end surface of the rotating table sleeve 6.

[0066] After the electromagnetic iron is powered off, the magnetic field disappears, and the magnetic attraction to the iron core also disappears. Therefore, the scanning base is easily and safely unloaded, and the positioning pin 24 will not be pierced by force.

[0067] The screwing alignment, the positioning of the sliding groove 65, the limiting shoulder 83, the top end surface of the iron core and the sleeve 6 being flush, and the bottom surface of the armature and the sliding table 5 being flush, and other foolproof designs reduce errors. When in use, the orientation does not need to be identified, and the correct positioning can be achieved by identifying the mark.

[0068] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. An electromagnetic positioning structure for calibrated, ear impression scan abutments on AC power, characterized by, The calibration and ear impression scanning base AC-powered electromagnetic positioning structure includes a self-rectifier, which comprises a turntable assembly, a swing arm, a moving connector, and a stationary connector. The stationary connector is fixedly connected to the swing arm, and the turntable assembly drives the moving connector to rotate, with the moving connector positioned above the stationary connector. The stationary terminal block is provided with a semi-circular L-pole conductive ring and an N-pole conductive ring. The L-pole conductive ring and the N-pole conductive ring are centrally symmetrically located on the virtual ring and are respectively connected to the L-pole and N-pole of the AC power. The movable connecting piece is provided with a positive conductive elastic contact and a negative conductive elastic contact, which are arranged symmetrically at the center. When the positive conductive elastic contact is in contact with the L-polar conductive ring, the negative conductive elastic contact is in contact with the N-polar conductive ring; when the positive conductive elastic contact is in contact with the N-polar conductive ring, the negative conductive elastic contact is in contact with the L-polar conductive ring. The number of rotations of the turntable assembly per unit time is the same as the period of the alternating current. The calibration and ear impression scanning base AC-powered electromagnetic positioning structure also includes a calibration component or pin assembly, a universal base sleeve, and a slide. The lower surface of the calibration component or pin assembly is provided with several screw holes. The universal base sleeve is in the shape of an inverted cup and has an inner cavity. The side wall of the inner cavity is provided with a first internal thread, and the bottom is provided with several first countersunk holes. The universal base sleeve is connected to the calibration component or pin assembly by a first countersunk screw, which passes through the first countersunk hole and is screwed into the screw hole. The top of the turntable assembly is provided with an arc-shaped slide groove. The slide table is cylindrical in shape, with an arc-shaped slide rail connected to its lower surface and an armature pressed against its upper surface. A first external thread is provided on the side, which is screwed into the first internal thread. The slide rail and the slide groove are matched in shape and the slide rail is inserted into the slide groove. The self-rectifier device supplies power to the electrical equipment, which is an electromagnet. The electromagnet is installed in the turntable assembly and attracts the armature. The armature includes a cylindrical body and a protruding post, the radius of which is smaller than the radius of the body. The slide table has a slide table through hole in the middle, and the protrusion extends into the slide table through hole; The electromagnet includes an "I"-shaped frame with a coil wound around the middle of the frame and through holes around the central axis of the frame; a cylindrical iron core is placed in the through holes of the frame.

2. The calibrated, ear impression scan abut AC power electromagnetic positioning structure of claim 1, wherein, The positive conductive elastic contact and the negative conductive elastic contact are connected to the positive and negative terminals of the electrical equipment, respectively, and an isolation diode is connected in series between the positive conductive elastic contact and the electrical equipment.

3. The calibrated, earmold scan abutment AC powered electromagnetic positioning structure of claim 2, wherein, A pair of insulating components are connected to the stationary terminal piece. The pair of insulating components are respectively disposed between the end point of the L-polar conductive ring and the end point of the N-polar conductive ring. The raised top surface of the insulating component is flush with the surface of the L-polar conductive ring and the N-polar conductive ring.

4. The calibrated, earmold scan abutment AC powered electromagnetic positioning structure of claim 3, wherein, A capacitor is connected between the positive conductive elastic contact and the negative conductive elastic contact.

5. The calibrated, ear impression scan abut AC power electromagnetic positioning structure of claim 4, wherein, The stationary connecting piece has a first through hole at its center, and the swing arm has a second through hole on its upper surface. The first through hole and the second through hole overlap. The stationary connecting piece is fixedly connected to the upper surface of the swing arm, and the turntable assembly drives the moving connecting piece to rotate through the first through hole and the second through hole.

6. The calibrated, ear impression scan abut AC power electromagnetic positioning structure of claim 5, wherein, The edge of the body is provided with a plurality of second countersunk head through holes; the armature is connected with the universal base sleeve through second countersunk head screws, the second countersunk head screws are screwed with the universal base sleeve through the second countersunk head through holes.

7. The calibrated, earmold scan abutment AC powered electromagnetic positioning structure of claim 6, wherein, The rotary table assembly further comprises a rotary table sleeve and a rotary table body, the rotary table sleeve is in the shape of an inverted cup, the rotary table sleeve is provided with a central through hole at the top, the rotary table sleeve has a rotary table inner cavity, the electromagnet is arranged in the rotary table inner cavity, the side wall of the rotary table sleeve is provided with a second internal thread, and the sliding groove is arranged on the top surface of the top of the rotary table sleeve; the rotary table body comprises an upper part and a lower part, the lower end side of the upper part is connected with a limiting shoulder, the side of the upper part is provided with a second external thread, the second external thread is screwed with the second internal thread, the lower part penetrates through the first through hole and the second through hole, the lower part is provided with an axle hole around the central axis, the output shaft of the motor is inserted into the axle hole, the radial hole is arranged in the radial direction of the lower part, the radial hole is perpendicular to the axle hole, a set screw is screwed in the radial hole, and the top end of the set screw abuts against the output shaft of the motor.

8. The calibrated, ear impression scan abut AC power electromagnetic positioning structure of claim 7, wherein, The lower end of the cylindrical core is connected with a core bottom disc, and the core bottom disc is connected with the upper part.

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