A calibrated, ear impression scan abutment

Abstract

This invention discloses a calibration and ear impression scanning base, comprising a switching DC power supply. The DC power supply includes an electromagnetic interference suppression circuit, a bridge rectifier circuit, and a switching power transistor connected in series. 220V, 50Hz AC mains power is rectified by the bridge rectifier circuit to form 300V DC. This is then inverted and stepped down to a suitable AC voltage by the switching power transistor and transformer. After passing through a first rectifier and filter circuit, a stable 24V low-voltage DC is formed, supplying power to the electromagnets operating on the calibration and ear impression scanning base. The voltage regulation feedback circuit reflecting output voltage changes employs an optocoupler isolation scheme. The control circuit uses an integrated chip IC1, model M6362B. The M6362B's 6-pin GATE power MOSFET drives the output, controlling the switching power transistor's on / off state. The M6362B also provides comprehensive protection coverage with automatic recovery.

Description

Technical Field

[0001] This invention relates to a calibration and ear impression scanning platform, belonging to the field of acoustic processing equipment. Background Technology

[0002] Please refer to patent application number CN202222260703.0, which discloses an electromagnetic positioning structure for a calibration and ear impression scanning base. This electromagnetic positioning structure operates using direct current (DC). The magnetic force of the electromagnet is closely related to the DC voltage. How to provide a stable DC voltage for the electromagnetic positioning structure of the calibration and ear impression scanning base is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention aims to provide a calibration and ear impression scanning platform.

[0004] To achieve the above objectives, the technical solution adopted by this invention is: a calibration and ear impression scanning base, comprising a DC power supply. The main circuit of the DC power supply comprises, in series, an anti-electromagnetic interference circuit, a bridge rectifier circuit, a switching power transistor and a transformer, and a first rectifier filter circuit. The electromagnetic interference suppression circuit at the AC input terminal includes capacitor C1, inductor L1, and capacitor C2 connected in parallel. The input terminal of the electromagnetic interference suppression circuit is connected to 220V AC, and the output terminal is connected to the input terminal of the bridge rectifier circuit. The bridge rectifier circuit includes diodes VD1, VD2, VD3, and VD4, which are connected in series. The transformer includes a primary winding and several secondary windings. The output terminal of the bridge rectifier circuit is connected to one input terminal of the primary winding. The other end of the primary winding is connected to the drain D of the switching power transistor VT. Resistor R1 and capacitor C3 are connected in parallel and then in series with diode VD5, and then connected across the two ends of the primary winding to absorb and suppress the transient back EMF generated by the primary winding during the switching process. The source S of the switching power transistor VT is connected to resistor R6, and the other end of resistor R6 is connected to the same potential. The gate G of the switching power transistor is connected to pin 6 of the control chip IC1, which drives the power MOSFET output (pulse width modulation output). When the switching power transistor VT is turned on, the 300V DC current from the rectifier bridge flows into the primary winding, then flows from the drain (D) of the series-connected switching power transistor to the source (S), and then through the source feedback resistor R6 to ground, forming a loop. The switching power transistor is driven by the modulated pulse width output from pin GATE6 of the integrated chip IC1, rapidly turning on and off at a high frequency of 65kHz. The current flowing into the primary winding also turns on and off at a high frequency of 65kHz, creating a high-frequency alternating magnetic field. The number of turns in the secondary winding is much lower than that in the primary winding; the turns ratio of each secondary winding to the primary winding is determined by the design. Under the strong action of the alternating magnetic field, each secondary winding induces a 65kHz high-frequency, low-voltage AC current. We call this process of converting 300V DC to AC "inversion." The reason for using a high-frequency conversion is that, compared to the power frequency, it can greatly reduce the size and weight of the transformer, significantly reducing costs and improving efficiency. One of the secondary windings is connected to the input terminal of the first rectifier and filter circuit; the first rectifier and filter circuit includes a rectifier diode VD10 and a filter capacitor C6, the rectifier diode VD10 is connected in series in the positive line of the first rectifier and filter circuit; one end of the capacitor C6 is connected to the negative terminal of the diode VD10, and the other end is connected to the negative line of the first rectifier and filter circuit.The control circuit includes an integrated chip IC1 and its peripheral components. The peripheral components include: diode VD13, resistors R5, R7, and R8, a temperature resistor RT, and capacitor C7. The integrated chip IC1 is an M6362B, a highly integrated current PWM control chip in an SOT23-6 package. Its pin configuration is as follows: pin 1 (GND) is connected to equipotential; pin 2 (FB) is the feedback signal input; pin 3 (PRT) is for external temperature protection; pin 4 (SEN) is the current signal detection pin; pin 5 (VDD) is for chip power supply; and pin 6 (GATE) is the power MOSFET drive output. Resistor R5 provides the operating power to the integrated chip IC1. C7 is charged, causing its voltage to rise. When the voltage reaches the threshold, the integrated chip IC1 starts operating.

[0005] The optocoupler IC2 feeds back the signal indicating the output voltage change to pin 2 (FB) of IC1. The source feedback resistor R6 of the switching power transistor is connected in series in the primary winding and the switching power transistor circuit. The magnitude of the current flowing through the circuit causes a corresponding change in the voltage drop across the source feedback resistor. This voltage drop is then cross-linked to pin 4 (SEN) of IC1 via resistor R7. The PWM duty cycle of the chip is determined by the voltage level signal at pin 2 (FB) and the current signal introduced at pin 4 (SEN).

[0006] The second secondary winding is connected to resistor R8 to pin 3 (PRT) of integrated chip IC1 to detect the demagnetization status of the transformer core and adjust the OVP trigger voltage; the PRT pin is connected to temperature resistor RT for external temperature protection.

[0007] The modulated pulse width drive signal is output from pin 6 (GATE) of integrated chip IC1, driving the switching power transistor to turn on and off at a high frequency of 65kHz.

[0008] The voltage regulation feedback circuit includes resistors R9, R10, R11, and R12, capacitor C8, Zener diode VW4, resistor R13, and integrated chip IC2. Resistors R9 and R10 are connected in series to form a voltage divider sampling circuit, which is connected across the positive and negative terminals of the output voltage. One end of resistor R9 is connected to the positive terminal of the first rectifier filter circuit, and the other end is connected to one end of resistor R10. The other end of resistor R10 is connected to the same potential. The other end of resistor R11 is connected to one end of capacitor C8, and the other end of capacitor C8 is connected to the negative terminal of Zener diode. The two ends of resistor R13 are connected to the two emitters of integrated chip IC2. The positive terminal of Zener diode VW4 is connected to the same potential, and the negative terminal is connected to the other emitter of integrated chip IC2. The regulating terminal is connected to one end of R10. One emitter of integrated chip IC2 is connected to one end of R12, and the other end of R12 is connected to diode VD10.

[0009] When the output voltage changes, the current flowing through R9 and R10 changes accordingly, and the voltage drop across R10 also changes accordingly. The voltage drop across R10 is measured, accurately reflecting the change in output voltage, and sent to pin 1 of the VW4 reference voltage chip TL431. This is compared with the chip's built-in reference voltage, generating an error signal. This causes a change in the current flowing through the LED on one side of the optocoupler of integrated chip IC2, resulting in a corresponding change in illuminance. The electrical signal is converted into a light signal. The phototransistor on the other side of the optocoupler of integrated chip IC2 receives the changing light signal through a non-transparent induction mechanism, generating a corresponding change in current. The light signal is then converted back into an electrical signal and fed back to pin 2 (FB) of integrated chip IC1.

[0010] The invention is further configured such that: the calibration and ear impression scanning base includes a calibration component or pin component, a universal base sleeve and a slide, and a turntable assembly; the lower surface of the calibration component or pin component is provided with a plurality of screw holes; the universal base sleeve is in the shape of an inverted cup, having an inner cavity, the side wall of the inner cavity being provided with an internal thread, and the bottom being provided with a plurality of first countersunk through holes; the universal base sleeve is connected to the calibration component or pin component by a first countersunk screw, the first countersunk screw passing through the first countersunk through holes and screwed into the screw holes; the top of the turntable assembly is provided with an arc-shaped slide groove; the slide is cylindrical, with an arc-shaped slide rail connected to the lower surface, an armature pressed against the upper surface, and a first external thread provided on the side, the first external thread being screwed into the internal thread; the slide rail and the slide groove are matched in shape, and the slide rail is inserted into the slide groove; an electromagnet is provided in the turntable assembly, and the electromagnet attracts the armature.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: 220V, 50Hz AC mains power is rectified by a bridge rectifier circuit to form DC power, which is then inverted and stepped down to a suitable AC voltage by a switching power transistor and a transformer. After passing through a first rectifier and filter circuit, a stable low-voltage DC power is formed, supplying the operation of the electromagnets for calibration and imprint scanning. The primary and secondary sides of the transformer are isolated by electromagnetic induction coupling; the equipotential terminals of the primary and secondary sides are completely isolated from each other, while the voltage regulation feedback circuit reflecting output voltage changes uses an optocoupler isolation scheme. The combination of these two methods achieves perfect full isolation. The control circuit uses integrated chip IC1, model number M6362B. IC1M6362B is a highly integrated current PWM control chip in an SOT23-6 package. M6362B also provides comprehensive protection coverage with automatic recovery, including circulating current protection (OCP), overload protection (OLP), voltage lockout protection (UVLO), over-temperature protection (OTP), and overvoltage protection (OVP), as well as excellent anti-EMI electromagnetic interference performance. Attached Figure Description

[0012] Figure 1 A bottom view of the calibration component; Figure 2Side view of the calibration component; Figure 3 This is a top view of the pin assembly; Figure 4 A bottom view of the pin assembly; Figure 5 For along Figure 4 Sectional view along line AA; Figure 6 This is a schematic diagram of the structure of a general-purpose base sleeve; Figure 7 This is a top view of the armature; Figure 8 for Figure 7 Sectional view along line BB; Figure 9 This is a top view of the slide table; Figure 10 For along Figure 9 Sectional view along the CC line; Figure 11 This is a bottom view of the slide table; Figure 12 A schematic diagram of the assembly structure of the general base plate and calibration components; Figure 13 This is a schematic diagram of the assembly structure using a universal base sleeve, calibration components, armature, and slide. Figure 14 This is a schematic diagram of the assembly structure of a general-purpose base plate and scanning components;

[0013] Figure 15 A schematic diagram of the assembly structure of the general-purpose base sleeve, scanning assembly, armature and slide; Figure 16 This is a top view of the turntable sleeve; Figure 17 This is a schematic diagram of the turntable sleeve structure; Figure 18 This is a bottom view of the turntable sleeve; Figure 19 This is a bottom view of the iron core; Figure 20 For along Figure 19 Sectional view along the DD line; Figure 21 This is a sectional view of the skeleton. Figure 22 This is a top view of the turntable. Figure 23 For along Figure 22 Sectional view of the EE line; Figure 24 This is a bottom view of the turntable. Figure 25 Top view of the stationary connector; Figure 26 This is a schematic diagram of the static connection piece structure; Figure 27 Top view of the stationary connector; Figure 28 This is a schematic diagram of the moving connector structure; Figure 29 Assembly drawings for the turntable sleeve, turntable body, frame, electromagnetic coil, stationary terminal block, stationary terminal block and motor; Figure 30 This is a circuit diagram for a DC power supply.

[0014] In the diagram: 1. Moving connector; 101. Moving connector base plate; 102. Moving connector base plate through hole; 103. Moving connector inner ring; 104. Moving connector outer ring; 105. Capacitor C9; 106. Spring contact; 107. Second connector pad; 111. Motor; 121. Swing arm; 10. Stationary connector; 11. Calibration base plate; 12. Calibration base; 13. First screw hole; 21. Pin base; 22. Second screw hole; 23. Reinforcing piece; 24. Positioning pin; 3. Universal base sleeve; 31. First countersunk hole; 32. Base sleeve inner cavity; 33. Internal thread; 34. First countersunk screw; 41. Body; 42. Protrusion; 43. Second countersunk hole; 44. Second countersunk screw; 5. Slide; 51. First external thread; 52. Slide through hole; 5 3. Slide rail; 54. Assembly hole; 6. Turntable sleeve; 61. Turntable sleeve side wall; 62. Second internal thread; 63. Turntable inner cavity; 64. Center through hole; 65. Slide groove; 71. Iron core chassis; 72. Cylindrical iron core; 73. Third countersunk hole; 74. First lead wire sheath hole; 75. Skeleton through hole; 76. Skeleton; 77. Lead wire sheath; 78. Coil; 79. Third countersunk screw; 81. Connecting shaft; 82. Turntable body; 83. Limiting shoulder; 84. Second and first external threads; 85. Shaft hole; 86. Radial hole; 87. Second lead wire sheath hole; 88. Internal thread blind hole; 89. Set screw; 91. Static joint base plate; 92. Static joint base plate through hole; 93. Static joint inner ring; 94. Static joint outer ring; 95. First wiring pad. Detailed Implementation

[0015] Example 1: See Appendix Figure 30As shown, a calibration and ear impression scanning base in this embodiment includes a DC power supply. The DC power supply includes an anti-electromagnetic interference circuit, a bridge rectifier circuit, a switching power transistor, a transformer, and a first rectifier filter circuit connected in series, as well as a voltage regulation feedback circuit and a control circuit. The main circuit includes an electromagnetic interference suppression circuit comprising capacitor C1, inductor L1, and capacitor C2 connected in parallel. The input of the electromagnetic interference suppression circuit is connected to 220V AC, and the output is connected to the input of a bridge rectifier circuit. The bridge rectifier circuit includes diodes VD1, VD2, VD3, and VD4, connected in series. The transformer includes a primary winding and several secondary windings. The output of the bridge rectifier circuit is connected to the input of the primary winding. The other end of the primary winding is connected to the drain (D) of the switching power transistor VT. Resistor R1 and capacitor C3 are connected in parallel and then in series with diode VD5, which is then connected across the primary winding to absorb and suppress the transient back EMF generated during the switching process. The source (S) of the switching power transistor VT is connected to resistor R6, with the other end of resistor R6 connected to the same potential. The gate (G) of the switching power transistor is connected to pin 6 of the integrated chip IC1, which drives the power MOSFET output (pulse width modulation output). When the switching power transistor VT is turned on, the 300V DC current from the rectifier bridge flows into the primary winding, then flows from the drain (D) of the series-connected switching power transistor to the source (S), and then through the source feedback resistor R6 to ground, forming a loop. The switching power transistor is driven by the modulated pulse width output from pin GATE6 of the integrated chip IC1, rapidly turning on and off at a high frequency of 65kHz. The current flowing into the primary winding also turns on and off at a high frequency of 65kHz, creating a high-frequency alternating magnetic field. The number of turns in the secondary winding is much lower than that in the primary winding. Under the strong action of the alternating magnetic field, each secondary winding induces a 65kHz high-frequency, low-voltage alternating current. We call this process of converting 300V DC to AC "inversion." The reason for using a high-frequency conversion is that, compared to the power frequency, it can greatly reduce the size and weight of the transformer, significantly reducing costs and improving efficiency.One of the secondary windings is connected to the input terminal of the first rectifier and filter circuit; the first rectifier and filter circuit includes a diode VD10 and a capacitor C6, with diode VD10 connected in series in the positive line of the first rectifier and filter circuit; one end of capacitor C6 is connected to the negative terminal of diode VD10, and the other end is connected to the negative line of the first rectifier and filter circuit; the control circuit includes an integrated chip IC1, a resistor R8, a temperature resistor RT, a diode VD13, a resistor R5, a resistor R7, a resistor R6, a capacitor C7, and a switching power transistor VT; the S terminal of the switching power transistor is connected to the other end of the primary winding of the transformer, the G terminal is connected to the GATE terminal of the integrated chip IC1, and the D terminal is connected to one end of R7. The connection is as follows: the other end of resistor R7 is connected to the SEN terminal of integrated chip IC1; the negative terminal of the bridge rectifier output and the GND terminal of integrated chip IC1 are connected to the same potential; one end of resistor R8 is connected to one end of the second secondary winding, and the other end is connected to one end of temperature resistor RT, with the other end of temperature resistor RT and the other end of the second secondary winding connected to the same potential; the PRT terminal of integrated chip IC1 is connected to the wire between temperature resistor RT and resistor R8; one end of the second secondary winding of the transformer is connected to the positive terminal of diode VD13 and the other end of resistor R8, with the other end connected to the same potential; the negative terminal of diode VD13 is connected to one end of resistor R5. The other end of R5 is connected to the negative terminal of the output of the bridge rectifier circuit; one end of resistor R6 is connected to the source (S) terminal of the switching power transistor, and the other end is connected to the same potential; one end of resistor R7 is connected to the source (S) terminal of the switching power transistor, and the other end is connected to the SEN terminal of integrated chip IC1; the VDD terminal of integrated chip IC1 is connected to the negative terminal of diode VD13 and one end of capacitor IC7, and the other end of capacitor IC7 is connected to the same potential; the voltage regulation feedback circuit includes resistors R9, R10, R11, and R12, capacitor C8, Zener diode VW4, resistor R13, and integrated chip IC2; one emitter terminal of integrated chip IC2 is connected to the FB terminal of integrated chip IC1. The connections are as follows: one end of resistor R9 is connected to the positive terminal of the first rectifier filter circuit, and the other end is connected to one end of resistor R10, with the other end of resistor R10 at the same potential; one end of resistor R11 is connected to the other end of resistor R9; the other end of resistor R11 is connected to one end of capacitor C8, with the other end of capacitor C8 connected to the negative terminal of Zener diode; both ends of resistor R13 are connected to the two emitters of integrated chip IC2 respectively; the positive terminal of Zener diode VW4 is at the same potential, and the negative terminal is connected to the other emitter of integrated chip IC2; the regulating terminal is connected to one end of R10; one emitter of integrated chip IC2 is connected to one end of R12, with the other end of R12 connected to diode VD10.

[0016] The primary and secondary sides of the transformer are isolated using electromagnetic induction coupling. The equipotential bonding terminal of the primary side and the equipotential circuit of the secondary side are completely isolated from each other, while the voltage regulation feedback circuit reflecting output voltage changes uses an optocoupler isolation scheme. The combination of these two achieves perfect full isolation. The control circuit uses integrated chip IC1, model M6362B. The M6362B is a highly integrated current PWM control chip that provides comprehensive protection coverage including circulating current protection (OCP), overload protection (OLP), voltage lockout protection (UVLO), over-temperature protection (OTP), and overvoltage protection (OVP) with automatic recovery, as well as excellent anti-EMI electromagnetic interference performance.

[0017] The first rectifier filter circuit also includes a voltage regulation feedback circuit and an isolation diode VD11. The isolation diode VD11 is connected in series on the positive line of the first rectifier filter circuit, and the negative terminal of the rectifier diode VD10 is connected to the positive terminal of the isolation diode VD11.

[0018] The voltage regulation feedback circuit includes resistors R9, R10, R11, and R12, capacitor C8, Zener diode VW4, resistor R13, and integrated chip IC2. Resistors R9 and R10 are connected in series to form a voltage divider sampling circuit, which is connected across the positive and negative terminals of the output voltage. One end of resistor R9 is connected to the positive terminal of the first rectifier filter circuit, and the other end is connected to one end of resistor R10. The other end of resistor R10 is connected to the same potential.

[0019] The other end of resistor R11 is connected to one end of capacitor C8, and the other end of capacitor C8 is connected to the negative terminal of Zener diode; the two ends of resistor R13 are connected to the two emitters of integrated chip IC2 respectively; the positive terminal of Zener diode VW4 is connected to the same potential, and the negative terminal is connected to the other emitter of integrated chip IC2; the regulating terminal is connected to one end of R10; one emitter of integrated chip IC2 is connected to one end of R12, and the other end of R12 is connected to diode VD10.

[0020] The circuit consists of resistors R11 and R12, capacitor C8, Zener diode VW4, resistor R13, and integrated circuit chip IC2. One emitter of integrated circuit chip IC2 is connected to the FB terminal of integrated circuit chip IC1. One end of resistor R9 is connected to the positive terminal of the first rectifier filter circuit, and the other end is connected to one end of resistor R10, with the other end of resistor R10 at the same potential. One end of resistor R11 is connected to the other end of resistor R9. The other end of resistor R11 is connected to one end of capacitor C8, and the other end of capacitor C8 is connected to the negative terminal of the Zener diode. Both ends of resistor R13 are connected to the two emitters of integrated circuit chip IC2. The positive terminal of Zener diode VW4 is at the same potential, and its negative terminal is connected to the other emitter of integrated circuit chip IC2. The regulating terminal is connected to one end of R10. One emitter of integrated circuit chip IC2 is connected to one end of R12, and the other end of R12 is connected to diode VD10.

[0021] When the output voltage changes, the current flowing through R9 and R10 changes accordingly, and the voltage drop across R10 also changes accordingly. The voltage drop across R10 is measured, accurately reflecting the change in output voltage, and sent to pin 1 of the VW4 reference voltage chip TL431. This is compared with the chip's built-in reference voltage, generating an error signal. This causes a change in the current flowing through the LED on one side of the optocoupler of integrated chip IC2, resulting in a corresponding change in illuminance. The electrical signal is converted into a light signal. The phototransistor on the other side of the optocoupler of integrated chip IC2 receives the changing light signal through a non-transparent induction mechanism, generating a corresponding change in current. The light signal is then converted back into an electrical signal and fed back to pin 2 (FB) of integrated chip IC1.

[0022] The DC power supply also includes a second rectifier and filter circuit and a first voltage regulator circuit. The third secondary winding is connected to the input terminal of the second rectifier and filter circuit. The second rectifier and filter circuit includes a rectifier diode VD9 and a filter capacitor C5. The rectifier diode VD9 is connected in series in the positive terminal of the second rectifier and filter circuit. One end of the filter capacitor C5 is connected to the negative terminal of the rectifier diode VD9, and the other end is connected to the negative terminal of the second rectifier and filter circuit. The first voltage regulator circuit includes a resistor R4, a Zener diode VW3, and a second Zener diode VW3. One end of the resistor R4 is connected to the negative terminal of the rectifier diode VD9 and the positive terminal of the filter capacitor C4, and the other end of the resistor R4 is connected to the negative terminal of the Zener diode VW3. The other end of the Zener diode VW3 is connected to the negative terminal of the second rectifier and filter circuit. The Zener diode VW3 is added to stabilize the output voltage. By using secondary windings with different numbers of turns, DC power supplies with different voltages can be provided.

[0023] The DC power supply also includes a third rectifier and filter circuit and two parallel output branches. The fourth secondary winding is connected to the input terminal of the third rectifier and filter circuit. The third rectifier and filter circuit includes a rectifier diode VD6, an isolation diode VD7, and a filter capacitor C4. The rectifier diode VD6 is connected in series in the positive terminal of the third rectifier and filter circuit. One end of the filter capacitor C4 is connected to the negative terminal of the rectifier diode VD6, and the other end is connected to the negative terminal of the third rectifier and filter circuit. One of the output branches is connected in series with the isolation diode VD7 to output to the second voltage regulator circuit. The second voltage regulator circuit includes a resistor R2 and a Zener diode VW1. One end of resistor R2 is connected to the cathode of isolation diode VD7, and the other end of resistor R2 is connected to the cathode of Zener diode VW1. The anode of Zener diode VW1 is connected to the same potential. Another output branch is connected in series with isolation diode VD8 to output to the third voltage regulator circuit. The third voltage regulator circuit includes a resistor R3 and a Zener diode VW2. One end of resistor R3 is connected to the cathode of isolation diode VD8, and the other end of resistor R2 is connected to the cathode of Zener diode VW2. The anode of Zener diode VW2 is connected to the same potential. Connecting the two parallel output branches in series with isolation diodes VD7 and VD8 respectively avoids mutual interference.

[0024] The DC circuit also includes a resistor R1, a capacitor C3, and a diode VD5. The capacitor C3 and the diode VD5 are connected in series and in parallel with the primary winding of the transformer. The resistor R1 is connected in parallel with the capacitor C3.

[0025] Example 2: See Appendix Figure 1-29 As shown, the difference between Embodiment 2 and Embodiment 1 is that the calibration and ear impression scanning base further includes a calibration component or pin assembly, a universal base sleeve 3 and a slide 5, and a turntable assembly. The lower surface of the calibration component or pin assembly is provided with several screw holes. The universal base sleeve 3 is in the shape of an inverted cup and has a base sleeve cavity 32. The side wall of the base sleeve cavity 32 is provided with internal threads 33, and the bottom is provided with several first countersunk holes 31. The universal base sleeve 3 and the calibration component or pin assembly are connected by first countersunk screws. 34 connection, the first countersunk screw 34 passes through the first countersunk hole 31 and is screwed into the screw hole; the top of the turntable assembly is provided with an arc-shaped slide groove 65; the slide table 5 is cylindrical in shape, the lower surface is connected to an arc-shaped slide rail 53, the upper surface is pressed against an armature, and the side is provided with a first external thread 51, which is screwed into the internal thread 33; the slide rail 53 and the slide groove 65 are matched in shape and the slide rail 53 is inserted into the slide groove 65; the turntable assembly is provided with an electromagnet, which attracts the armature.

[0026] The first countersunk screw 34 passes through the first countersunk hole 31 and is screwed into the screw hole, connecting the universal base sleeve 3 to the calibration component or pin assembly; the lower surface of the slide 5 is connected to the arc-shaped slide rail 53, and the edge of the slide 5 is provided with several mounting holes 54, and the upper surface is pressed against the armature. The slide 5 is screwed into the inside of the universal base sleeve 3; the top of the turntable assembly is provided with an arc-shaped slide groove 65; the shape of the slide rail 53 matches the shape of the slide groove 65, and the slide rail 53 is inserted into the slide groove 65. The shape of the slide groove 65 restricts the position of the slide rail 53, maintaining the relative position and relative angle between the calibration component or pin assembly and the turntable assembly; an electromagnet is provided in the turntable assembly, and the electromagnet attracts the armature, causing the universal base sleeve 3 and the slide 5 to move toward the turntable assembly.

[0027] The armature includes a cylindrical body 41 and a protruding post 42. The radius of the protruding post 42 is smaller than the radius of the body 41. The edge of the body is provided with several second countersunk holes 43. The middle part of the slide table 5 is provided with a slide table through hole 52, and the protruding post 42 extends into the slide table through hole 52. The armature and the universal base sleeve 3 are connected by a second countersunk screw 44. The second countersunk screw 44 passes through the second countersunk holes 43 and is screwed into the universal base sleeve 3.

[0028] The turntable assembly also includes a turntable sleeve 6 and a turntable body 82. The turntable sleeve 6 is shaped like an inverted cup. A central through hole 64 is provided at the bottom of the turntable sleeve 6. The turntable sleeve 6 has a turntable cavity 63. The electromagnet is disposed in the turntable cavity 63. A second internal thread 62 is provided on the side wall 61 of the turntable sleeve. The sliding groove 65 is provided on the top surface of the bottom of the turntable sleeve 6. The turntable body 82 includes an upper part and a lower part. A limiting shoulder 83 is connected to the lower side of the upper part. A second external thread 84 is provided on the side of the upper part. The second external thread 84 is screwed to the second internal thread 62. A shaft hole 85 is provided around the central axis of the lower part. The output shaft of the motor 111 is inserted into the shaft hole 85. A radial hole 86 is provided in the radial direction of the lower part. The radial hole 86 is perpendicular to the shaft hole 85. A set screw 89 is screwed into the radial hole 86. The top of the set screw 89 abuts against the output shaft of the motor 111. By covering the electromagnet with a turntable sleeve 6, the turntable sleeve 6 not only supports the electromagnet but also protects it from impact damage.

[0029] The upper surface of the turntable 82 has a blind hole 88 with internal threads. The electromagnet includes an "I"-shaped frame 76, with a coil 78 wound around the middle of the frame 76. A frame through hole 75 is provided around the central axis of the frame 76. A cylindrical iron core 72 is placed in the frame through hole 75. The lower end of the cylindrical iron core 72 is connected to an iron core base 71. Several third countersunk holes 73 are provided on the edge of the iron core base 71. The iron core base is connected to the upper part by third countersunk screws 79, which pass through the third countersunk holes 73 and are screwed into the blind hole 88 of the turntable 82. When the electromagnet is energized, the iron core is magnetized; when the electromagnet is de-energized, the iron core retains a weak magnetism and continues to exert an attractive force on the armature.

[0030] The coil 78 is connected to a lead wire; a plurality of lead wire sheaths 77 are provided on the lower end of the frame, 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.

[0031] The turntable assembly also includes a conductive mechanism 111 for a planar brush. The conductive mechanism 111 includes several capacitors C9105, stationary terminals 10, and moving terminals. The stationary terminal 10 includes a stationary base plate 91, a stationary outer ring 94, a stationary inner ring 93, and a pair of first bonding pads 95. A stationary base plate through-hole 92 is formed in the center of the stationary base plate 91. The stationary outer ring 94 and the stationary inner ring 93 are fully circular closed-loop conductive rings. The stationary outer ring 94 and the stationary inner ring 93 are mutually insulated. The stationary outer ring 94 and the stationary inner ring 93 are concentric circles. The stationary outer ring 94 and the stationary inner ring 93 are each connected to a first bonding pad 95. The moving terminal includes a moving base plate 101, a moving outer ring 104, a moving inner ring 103, a resilient contact 106, and a pair of second bonding pads 107. The movable contact substrate 101 has a movable contact substrate through hole 102 in the middle. The movable contact outer ring 104 and the movable contact inner ring 103 are fully circular closed-loop conductive rings. The movable contact outer ring 104 and the movable contact inner ring 103 are insulated from each other. The movable contact outer ring 104 and the movable contact inner ring 103 are concentric circles. The movable contact outer ring 104 and the movable contact inner ring 103 are respectively connected to a second wiring pad 107. The size and width of the stationary contact outer ring 94 and the stationary contact inner ring 93 are the same as those of the movable contact outer ring 104 and the movable contact inner ring 103. The distribution positions of the stationary contact outer ring 94 and the stationary contact inner ring 93 correspond vertically to the distribution positions of the movable contact outer ring 104 and the movable contact inner ring 103. The movable contact outer ring 104 and the movable contact inner ring 103 are respectively connected to the stationary contact outer ring 94 and the stationary contact inner ring 93 through elastic contacts 106. The moving outer ring 104 and the moving inner ring 103 remain connected to the stationary outer ring 94 and the stationary inner ring 93 during the movement, thus supplying power to the electromagnet.

[0032] The motor 111 is fixedly connected to the swing arm 121, and the output shaft of the motor 111 passes through the swing arm 121; the stationary connecting piece 10 is connected to the upper surface of the swing arm 121, and the moving connecting piece is connected to the lower surface of the turntable.

[0033] The calibration assembly includes a calibration base plate 11 and a calibration base 12. The calibration base 12 is connected to the lower surface of the calibration base plate 11. The calibration base 12 is provided with a plurality of first screw holes 13. The first countersunk screws 34 pass through the first countersunk holes 31 and are screwed into the first screw holes 13.

[0034] The pin assembly includes a reinforcing plate 23, a pin base 21, and a positioning pin 24. The lower surface of the pin base 21 has several second screw holes 22. A first countersunk screw 34 passes through a first countersunk hole 31 and is screwed into the second screw holes 22. The reinforcing plate 23 is fixedly connected to the center of the pin base 21, and the positioning pin 24 is vertically connected to the reinforcing plate 23. The slide table 5 has several through-holes for assembly processes, which are located on the outer side of the slide rail 53.

[0035] In summary, the principle of the calibration and ear impression scanning base shown in this invention is as follows: A first countersunk screw 34 passes through a first countersunk hole 31 and is screwed into a screw hole, connecting the universal base sleeve 3 to the calibration component or pin assembly. A slide 5 is screwed inside the universal base sleeve 3; the upper surface of the slide 5 abuts against the armature, and the lower surface of the slide 5 is connected to an arc-shaped slide rail 53. An arc-shaped groove 65 is provided at the top of the turntable assembly; the slide rail 53 is inserted into the groove 65, and the shape of the groove 65 restricts the position of the slide rail 53, maintaining the relative position and angle between the calibration component or pin assembly and the turntable assembly. An electromagnet is provided in the turntable assembly, attracting the armature and causing the universal base sleeve 3 and the slide 5 to move towards the turntable assembly. During the automatic insertion of the slide rail 53 into the groove 65, it slides from shallow to deep and automatically returns to its original position. This utilizes the principle of a ramp and the attraction of the electromagnet, allowing it to slide only along the groove, saving effort, time, and time, and making installation and removal simple and convenient. Because bronze has a low coefficient of friction, it also has a self-lubricating effect, resulting in less resistance during sliding. This makes it particularly suitable for this invention as a material for manufacturing the slide rail 53 and the slide table 5. An electromagnetic coil 78 is wound around the frame and fitted onto a cylindrical iron core 72, with the top surface of the cylindrical iron core 72 flush with the top surface of the turntable sleeve 6. Lead wires are led out from the lead wire sheath 77 and connected to a DC power supply; the lead wire sheath 77 passes through the lead wire sheath through holes 87 on the iron core base 71 and the turntable body 82. The turntable sleeve 6 is screwed to the turntable body 82, and the screwed connection is secured to the limiting shoulder 83 when assembled. The through hole 102 of the movable contact substrate is fitted into the top end of the connecting shaft 81 and fixed to the back of the turntable body 82; the movable outer ring 104 and the movable inner ring 103 face downwards and are connected to the lower surface of the movable contact substrate 101; the lead wires are led out from the lead wire sheath 77 and soldered to the second wiring pads 107 of the movable outer ring 104 and the movable inner ring 103 respectively. The stationary connection piece 10 is fixed to the upward-facing side of the swing arm 121; the stationary outer ring 94 and the stationary inner ring 93 face upwards; the output shaft of the motor 111 passes through the through hole 92 of the stationary contact substrate. Wires are led out from the stationary outer ring 94 and the stationary inner ring 93 and connected to the output terminal of the DC power supply. The motor 111 is fixed to the downward-facing side of the swing arm 121; the motor shaft passes through the swing arm 121, the through hole 92 of the stationary contact substrate, and extends into the central shaft hole 85 of the turntable body 82; then the motor shaft is fixed to the connecting shaft 81 by the set screw 89. The armature and slide 5 have outer diameters that are compatible with the inner diameter of the universal base sleeve 3; the turntable sleeve 6 has an outer diameter that is compatible with the inner diameter of the base sleeve 32; and the most prominent point of the slide rail 53 is recessed into the inner cavity 32 of the base sleeve, which serves to limit and align the parts, facilitating proper assembly. When the coil 78 is connected to a DC power supply, current flows through the electromagnetic coil 78, generating an electromagnetic effect and forming a strong magnetic field. The iron core encased by the coil 78 is simultaneously magnetized, generating a strong magnetic attraction. The magnetic field generated by the magnetization of the iron core, combined with the original magnetic field within the coil 78, significantly enhances the total magnetic field strength, making the electromagnet's magnetic force greater than that of a natural magnet.During calibration or scanning, motor 111 drives the turntable 82 to rotate. Due to the synchronous rotation of the electromagnets, the conductive structure of the planar brushes effectively powers the rotating electromagnets. The elastic contacts 106 of the moving outer ring 104 and moving inner ring 103 abut against the stationary outer ring 94 and stationary inner ring 93, respectively. Power is supplied to the horizontally rotating moving outer ring 104 and moving inner ring 103 through the fixed stationary outer ring 94 and stationary inner ring 93, achieving electrical connection. The elastic contacts 106 are made of phosphor bronze and are arc-shaped to maintain good elasticity. This invention differs from typical integrated structural designs; only a universal base sleeve 3 needs to be designed, which, when combined with calibration components, forms a calibration base; when combined with pin components, it forms a scanning base. The universal base sleeve 3, equipped with a two-pin base, is suitable for single-ear impression scanning; equipped with a four-pin base, it is suitable for dual-ear impression scanning. All of the above can share the same universal base kit 3 for interchange; or they can be equipped with their own universal base kit 3, highlighting the universality, interchangeability and flexibility of this design.

[0036] The 220V, 50Hz AC mains power is rectified into DC power by a bridge rectifier circuit. After being reduced in voltage by a transformer, and then filtered by the first rectifier circuit, a stable DC power waveform is formed to power the electromagnets of the calibration and imprint scanning base. The primary and secondary sides of the transformer are isolated by electromagnetic induction coupling; the equipotential bonding terminal of the primary side and the equipotential bonding circuit of the secondary side are completely isolated from each other. The voltage regulation feedback circuit that reflects the output voltage change adopts an optocoupler scheme. The control circuit uses an integrated chip IC1, model M6362B. The M6362B is a highly integrated current PWM control chip that provides comprehensive protection coverage including circulating current protection (OCP), overload protection (OLP), voltage lockout protection (UVLO), over-temperature protection (OTP), and overvoltage protection (OVP) with automatic recovery.

Claims

1. A calibrated, ear impression scan abut comprising a direct current power source, characterized in that, The DC power supply includes an electromagnetic interference suppression circuit, a bridge rectifier circuit, a switching power transistor, a conversion transformer, and a first rectifier and filter circuit connected in series, as well as a voltage regulation feedback circuit and a control circuit. The electromagnetic interference suppression circuit at the AC input terminal includes capacitor C1, inductor L1, and capacitor C2 connected in parallel. The input terminal of the electromagnetic interference suppression circuit is connected to 220V AC, and the output terminal is connected to the input terminal of the bridge rectifier circuit. The bridge rectifier circuit includes diodes VD1, VD2, VD3, and VD4, which are connected in series from beginning to end; the transformer includes a primary winding and several secondary windings. The output terminal of the bridge rectifier circuit is connected to one input terminal of the primary winding; one of the secondary windings is connected to the input terminal of the first rectifier and filter circuit. The first rectifier filter circuit includes a diode VD10 and a capacitor C6. The diode VD10 is connected in series in the positive line of the first rectifier filter circuit. One end of the capacitor C6 is connected to the negative terminal of the diode VD10, and the other end is connected to the negative line of the first rectifier filter circuit. The control circuit includes an integrated chip IC1, a resistor R8, a temperature resistor RT, a diode VD13, a resistor R5, a resistor R7, a resistor R6, a capacitor C7, and a switching power transistor VT. The source (S) terminal of the switching power transistor is connected to the other end of the primary winding of the transformer, the gate (G) terminal is connected to the GATE terminal of the integrated chip IC1, the drain (D) terminal is connected to one end of R7, and the other end of resistor R7 is connected to the SEN terminal of the integrated chip IC1. The negative terminal of the bridge rectifier circuit output and the GND terminal of the integrated chip IC1 are connected to the same potential. One end of the resistor R8 is connected to one end of the second secondary winding, and the other end is connected to one end of the temperature resistor RT. The other end of the temperature resistor RT and the other end of the second secondary winding are connected to the same potential. The PRT terminal of the integrated chip IC1 is connected to the wire between the temperature resistor RT and the resistor R8. One end of the secondary winding of the transformer is connected to the positive terminal of the diode VD13 and the other end of the resistor R8, and the other end is connected to the same potential. The negative terminal of the diode VD13 and the other end of the resistor R5 are connected to the negative terminal of the output terminal of the bridge rectifier circuit. One end of resistor R6 is connected to the source (S) terminal of the switching power transistor, and the other end is connected to the same potential; one end of resistor R7 is connected to the source (S) terminal of the switching power transistor, and the other end is connected to the SEN terminal of integrated chip IC1. The VDD terminal of integrated chip IC1 is connected to the negative terminal of diode VD13 and one end of capacitor IC7, while the other end of capacitor IC7 is connected to the same potential. The voltage regulation feedback circuit includes resistors R9, R10, R11, and R12, capacitor C8, Zener diode VW4, resistor R13, and integrated chip IC2. One of the transmitter terminals of the integrated chip IC2 is connected to the FB terminal of the integrated chip IC1; One end of resistor R9 is connected to the positive terminal of the first rectifier filter circuit, and the other end is connected to one end of resistor R10. The other end of resistor R10 is connected to the same potential. One end of resistor R11 is connected to the other end of resistor R9; the other end of resistor R11 is connected to one end of capacitor C8, and the other end of capacitor C8 is connected to the negative terminal of Zener diode. The two ends of resistor R13 are connected to the two emitters of integrated chip IC2, respectively; The positive terminal of the Zener diode VW4 is connected to the same potential, and the negative terminal is connected to the other emitter terminal of the integrated chip IC2; the regulating terminal is connected to one end of R10. One emitter of integrated chip IC2 is connected to one end of R12, and the other end of R12 is connected to diode VD10; The calibration and ear impression scanning base also includes a calibration component or pin assembly, a universal base sleeve and a slide, and a turntable assembly. 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 internal threads, and the bottom is provided with several first countersunk holes. The universal base sleeve is connected to the calibration component or pin assembly by first countersunk screws, which pass through the first countersunk holes and are screwed into the screw holes. 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 internal thread. The slide rail and the slide groove are matched in shape and the slide rail is inserted into the slide groove. An electromagnet is provided in the turntable assembly, which attracts the armature. The armature includes a cylindrical body and a protruding post, the radius of the protruding post being smaller than the radius of the body, and several second countersunk holes are provided on the edge of the body; a slide table through hole is provided in the middle of the slide table, and the protruding post extends into the slide table through hole; the armature and the universal base sleeve are connected by a second countersunk screw, the second countersunk screw passing through the second countersunk hole and screwed into the universal base sleeve. The electromagnet includes an "I"-shaped frame with a coil wound in the middle and through holes around the central axis of the frame. A cylindrical iron core is placed in the through holes, and the lower end of the cylindrical iron core is connected to an iron core base, which is connected to the upper part of the turntable. The coil is connected to a lead wire; a plurality of lead wire sheaths are provided on the lower end of the frame, and the lead wires pass through the lead wire sheaths; a first lead wire sheath through hole is provided on the edge of the iron core chassis; a second lead wire sheath through hole is provided on the upper part of the turntable body, and the lead wire sheath passes through the first lead wire sheath through hole and the second lead wire sheath through hole in sequence. The turntable assembly also includes a turntable sleeve and a turntable body. The turntable sleeve is shaped like an inverted cup, with a central through hole at the bottom and an inner cavity. The electromagnet is disposed in the inner cavity, and the side wall of the turntable sleeve has a second internal thread. The sliding groove is disposed on the top surface of the bottom of the turntable sleeve. The turntable body includes an upper part and a lower part. The lower end of the upper part is connected to a limiting shoulder, and the side of the upper part has a second first external thread, which is screwed into the second internal thread. The lower part has a shaft hole around its central axis, into which the output shaft of the motor is inserted. The lower part has a radial hole in the radial direction, perpendicular to the shaft hole, into which a set screw is screwed. The top of the set screw abuts against the output shaft of the motor.

2. The calibration, ear impression scan base, according to claim 1, wherein, The first rectifier filter circuit also includes a voltage regulation feedback circuit and an isolation diode VD11. The isolation diode VD11 is connected in series on the positive line of the first rectifier filter circuit, and the negative terminal of the rectifier diode VD10 is connected to the positive terminal of the isolation diode VD11. The voltage regulation feedback circuit includes resistors R9, R10, R11, and R12, capacitor C8, Zener diode VW4, resistor R13, and integrated circuit IC2. Resistors R9 and R10 are connected in series to form a voltage divider sampling circuit, which is connected across the positive and negative terminals of the output voltage. One end of resistor R9 is connected to the positive terminal of the first rectifier filter circuit, and the other end is connected to one end of resistor R10. The other end of resistor R10 is connected to the same potential. The other end of resistor R11 is connected to one end of capacitor C8, and the other end of capacitor C8 is connected to the negative terminal of Zener diode. The two ends of resistor R13 are connected to the two emitters of integrated circuit IC2. The positive terminal of Zener diode VW4 is connected to the same potential, and the negative terminal is connected to the other emitter of integrated circuit IC2. The regulating terminal is connected to one end of R10. One emitter of integrated circuit IC2 is connected to one end of R12, and the other end of R12 is connected to diode VD10.

3. The calibration, ear impression scan base, according to claim 2, wherein, The DC power supply also includes a second rectifier and filter circuit and a first voltage regulator circuit. The third secondary winding is connected to the input terminal of the second rectifier and filter circuit. The second rectifier and filter circuit includes a rectifier diode VD9 and a filter capacitor C5. The rectifier diode VD9 and a resistor R4 are connected in series in the positive terminal of the second rectifier and filter circuit. One end of the filter capacitor C5 is connected to the negative terminal of the rectifier diode VD9, and the other end is connected to the negative terminal of the second rectifier and filter circuit. The first voltage regulator circuit includes a resistor R4 and a Zener diode VW3. One end of the resistor R4 is connected to the negative terminal of the rectifier diode and the positive terminal of the filter capacitor C4, and the other end of the resistor R4 is connected to the negative terminal of the Zener diode VW3. The other end of the Zener diode VW3 is connected to the negative terminal of the second rectifier and filter circuit.

4. The calibration, ear impression scan base, of claim 3, wherein, The DC power supply also includes a third rectifier and filter circuit and two parallel output branches. The fourth secondary winding is connected to the input terminal of the third rectifier and filter circuit. The third rectifier and filter circuit includes a rectifier diode VD6, an isolation diode VD7, and a filter capacitor C4. The rectifier diode VD6 is connected in series in the positive line of the third rectifier filter circuit; one end of the filter capacitor C4 is connected to the negative terminal of the rectifier diode VD6, and the other end is connected to the negative line of the third rectifier filter circuit. One of the output branches is connected in series with isolation diode VD7 to output to the second voltage regulator circuit. The second voltage regulator circuit includes resistor R2 and Zener diode VW1. One end of resistor R2 is connected to the negative terminal of isolation diode VD7, and the other end of resistor R2 is connected to the negative terminal of Zener diode VW1. The positive terminal of Zener diode VW1 is connected to the same potential. Another output branch is connected in series with isolation diode VD8 to output to the third voltage regulator circuit. The third voltage regulator circuit includes resistor R3 and Zener diode VW2. One end of resistor R3 is connected to the negative terminal of isolation diode VD8, and the other end of resistor R2 is connected to the negative terminal of Zener diode VW2. The positive terminal of Zener diode is connected to the same potential.

5. The electromagnetic positioning structure for a cast, ear impression scan base as recited in claim 1, wherein, The turntable assembly also includes a conductive mechanism for a planar brush, which includes several capacitors C9, a stationary terminal block, and a moving terminal block. The stationary connector includes a stationary base plate, a stationary outer ring, a stationary inner ring, and a pair of first terminal pads. A stationary base plate through hole is opened in the middle of the stationary base plate. The stationary outer ring and the stationary inner ring are fully circular closed-loop conductive rings. The stationary outer ring and the stationary inner ring are insulated from each other. The stationary outer ring and the stationary inner ring are concentric circles. The stationary outer ring and the stationary inner ring are each connected to a first terminal pad. The movable connector includes a movable base plate, a movable outer ring, a movable inner ring, a resilient contact, and a pair of second wiring pads. A through-hole is formed in the center of the movable base plate. The movable outer ring and the movable inner ring are fully circular closed-loop conductive rings. The movable outer ring and the movable inner ring are insulated from each other and are concentric circles. Each of the movable outer ring and the movable inner ring is connected to a second wiring pad. The size and width of the stationary outer ring and the stationary inner ring are the same as those of the moving outer ring and the moving inner ring, respectively. The distribution positions of the stationary outer ring and the stationary inner ring correspond vertically to the distribution positions of the moving outer ring and the moving inner ring, respectively. The moving outer ring and the moving inner ring are connected to the stationary outer ring and the stationary inner ring through elastic contacts, respectively. The two ends of capacitor C9 are connected across the moving inner ring and the moving outer ring.

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