An electromagnetic positioning structure for a calibrated, ear impression scan abutment

Abstract

The application discloses a kind of electromagnetic positioning structure of calibration, earmark mould scanning base, including calibration component or pin component, general base sleeve and bronze sliding table, and rotary table component, the lower surface of calibration component or pin component is provided with several screw holes;General base sleeve has base sleeve inner cavity, the side wall of base sleeve inner cavity is provided with internal thread, and general base sleeve is connected with calibration component or pin component;The top of rotary table component is provided with circular-arc sliding slot;The bronze sliding table is in the shape of cylinder, the lower surface is connected with circular-arc slide rail, the upper surface is tightly connected with armature, the side is provided with external thread, and external thread is screwed with the internal thread;The shape of slide rail and sliding slot is matched and consistent, and slide rail is inserted into sliding slot;Electromagnet is provided in the rotary table component, and electromagnet attracts armature.When electromagnet is powered off, magnetic attraction disappears, without exerting force, general base sleeve can be easily removed, to prevent injury operator.

Description

TECHNICAL FIELD

[0001] The application relates to an electromagnetic positioning structure for calibrating and scanning an earmold base, and belongs to the field of process equipment. BACKGROUND

[0002] Earmolds and shells are acoustic components and are part of a hearing aid or headphone system. A good earmold not only accurately and clearly transmits sound, but also does not cause discomfort or whistling after long-term wearing. Because the size and shape of the concha and ear canal of people's auricles are different, in order to make a good earmold, an earmold that is completely consistent with the shape of the ear canal of a user is first collected. The earmold needs to be cut, dipped in wax, and cast. Then, a series of processes such as pouring a mold with photosensitive resin, UV curing, polishing, lettering, and applying varnish are performed. The process is complicated and is greatly affected by human factors of the manufacturer, so it is difficult to control the accuracy of the earmold, resulting in that the traditional earmold manufacturing method is time-consuming, material-consuming, and low in accuracy. With the rise of 3D technology, in recent years, the 3D scanning and printing additive manufacturing technology has been introduced into the hearing aid manufacturing industry. The earmold scanning is a non-contact measurement method, which adopts a structured light grating projection technology. The coded digital grating stripes are projected on the surface of the earmold, and the grating stripes are deformed due to the ups and downs of the surface of the earmold. The deformed grating stripes carry the three-dimensional information of the surface of the earmold. Then, a digital camera captures the digital images of the earmold from multiple directions, and a computer algorithm decodes the phase change caused by the deformation of the grating stripes, so that the 3D shape of the earmold can be reconstructed. Through the 3D scanning technology, the collected earmold data of different people can be converted into 3D printing data in the data format such as STL and OBJ, and finally a lifelike earmold can be printed and simulated. Because it is a digital and automatic operation, the influence of human factors of the manufacturer can be avoided, the manufacturing accuracy of the earmold is greatly improved, the subsequent cumbersome steps of the traditional method are omitted, and the production efficiency is improved. The 3D scanning technology obtains the 3D space coordinates and color information of each sampling point on the surface of the earmold through multi-directional scanning of the earmold, and finally generates a 3D model.

[0003] Because the projector and the camera are fixedly installed and the positions are unchanged, in order to obtain the digital image of the ear impression mold in as many directions as possible, the calibration process and the scanning process must be respectively completed on a rotary table which can rotate in 180 degrees and many directions, and because the rotary table is shared, the connection between the calibration and the scanning and the rotary table cannot adopt a non-detachable mode, but a simple, easy, convenient and reliable replacement connection structure should be designed. Because the accuracy of the calibration directly affects the scanning accuracy of the system, the calibration process and the scanning process are independent and have a connection. Therefore, after the calibration plate and the ear impression mold scanning base (the impression mold holder) are placed on the rotary platform, the starting positioning problem is generated. If the starting positioning of the calibration plate is not returned, the scanning accuracy is seriously reduced, and if the calibration fails, the system cannot work; if the starting positioning of the ear impression mold scanning base (the impression mold holder) is not in place, not only the accuracy is reduced, but also the model reconstruction is affected. SUMMARY

[0004] In order to overcome the above-mentioned defects, the purpose of the present application is to provide a kind of electromagnetic positioning structure of calibration, ear impression mold scanning base table. To solve the problem of calibration plate starting positioning not returning, causing scanning accuracy to be seriously reduced, affecting model reconstruction.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is: a kind of electromagnetic positioning structure of calibration, ear impression mold scanning base table, including calibration assembly or pin assembly, general base sleeve and bronze sliding table, and rotary table assembly, the lower surface of calibration assembly or pin assembly is provided with a plurality of screw holes;The general base sleeve is in the shape of an inverted cup, has a base sleeve cavity, the side wall of the base sleeve cavity is provided with internal thread, the bottom is provided with a plurality of first countersunk head perforation;The general base sleeve is connected with the calibration assembly or pin assembly by first countersunk head screw, the first countersunk head screw is screwed through the first countersunk head perforation and the screw hole;The top end of the rotary table assembly is provided with a circular arc sliding groove;The bronze sliding table is in the shape of a cylinder, the lower surface is connected with a circular arc sliding rail, the upper surface is abutted with an armature, the side surface is provided with external thread, and the external thread is screwed with the internal thread;The shape of the sliding rail and the sliding groove is matched and matched, and the sliding rail is inserted into the sliding groove;The electromagnetic iron is arranged in the rotary table assembly, and the electromagnetic iron attracts the armature.

[0006] The further setting of the present application is: the armature includes a body in the shape of a cylinder and a convex column, the radius of the convex column is less than the radius of the body, and the edge of the body is provided with a plurality of second countersunk head perforation;The middle part of the bronze sliding table is provided with a sliding table through hole, and the convex column extends into the sliding table through hole;The armature is connected with the general base sleeve by second countersunk head screw, and the second countersunk head screw is screwed with the general base sleeve through the second countersunk head perforation.

[0007] The present invention is further configured such that: the turntable assembly further includes a turntable sleeve and a turntable body; the turntable sleeve is shaped like an inverted cup; a central through hole is provided at the bottom of the turntable sleeve; the turntable sleeve has a turntable cavity; the electromagnet is disposed in the turntable cavity; the side wall of the cavity is provided with a turntable sleeve thread; and the sliding groove is provided 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 side of the upper part is connected to a limiting shoulder; the side of the upper part is provided with external threads, which are screwed into the turntable sleeve thread; a shaft hole is provided around the central axis of the lower part; the output shaft of the motor is inserted into the shaft hole; a radial hole is provided in the radial direction of the lower part; the radial hole is perpendicular to the shaft hole; a set screw is screwed into the radial hole; and the top of the set screw abuts against the output shaft of the motor.

[0008] The present invention is further configured such that: the electromagnet includes an "I"-shaped frame, a coil is wound around the middle of the frame, and a frame through hole is provided around the central axis of the frame; a cylindrical iron core is provided in the frame through hole, and an iron core base is connected to the lower end of the cylindrical iron core, and the iron core base is connected to the upper part.

[0009] The present invention is further configured such that: the coil is connected to a lead wire; a plurality of lead wire sheaths are provided on the lower end of the skeleton, 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, and the lead wire sheaths pass through the first lead wire sheath through hole and the second lead wire sheath through hole in sequence.

[0010] The present invention is further configured such that: the turntable assembly further includes a conductive mechanism for a planar brush, the conductive mechanism of which includes a stationary connecting piece and a moving connecting piece.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] The invention is further configured such that: the motor is fixedly connected to the swing arm, and the output shaft of the motor passes through the swing arm; the stationary connecting piece is connected to the upper surface of the swing arm, and the moving connecting piece is connected to the lower surface of the turntable.

[0015] The present invention is further configured such that: the calibration component includes a calibration substrate and a calibration base, the calibration base is connected to the lower surface of the calibration substrate, and the calibration base is provided with a plurality of first screw holes, wherein the first countersunk screw passes through the first countersunk hole and is screwed into the first screw hole.

[0016] The present invention is further configured such that: the pin assembly includes a pin base and a positioning pin, and the lower surface of the pin base is provided with a plurality of second screw holes, wherein the first countersunk screw passes through the first countersunk hole and is screwed into the second screw hole.

[0017] A further feature of the present invention is that the bronze slide table is provided with a plurality of through assembly process holes, which are located on the outside of the slide rail.

[0018] Compared with existing technologies, the advantages of this invention are: if a permanent magnet is used to attract the turntable assembly to the armature in the universal base sleeve, the slide rail can be automatically inserted into the slide groove, and the assembly is complete when the front end of the slide rail abuts the bottom end of the slide groove. However, when disassembling the universal base sleeve, in order to overcome the magnetic attraction of the permanent magnet, excessive force is often used, resulting in the positioning pin piercing the arm or the calibration substrate hitting the arm. When the electromagnet is de-energized, the magnetic attraction disappears, and the universal base sleeve can be easily removed without applying excessive force, preventing injury to the operator.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 A bottom view of the calibration component;

[0021] Figure 2 Side view of the calibration component;

[0022] Figure 3 This is a cross-sectional view of the pin assembly.

[0023] Figure 4 This is a schematic diagram of the structure of a general-purpose base sleeve;

[0024] Figure 5 This is a top view of the armature;

[0025] Figure 6 This is a cross-sectional view of the armature;

[0026] Figure 7 Bronze slide, top view;

[0027] Figure 8 Bronze slide, top view; Figure 7 Bronze slide, section along AA line;

[0028] Figure 9 Bronze slide, section along AA line;

[0029] Figure 10 Bronze slide, section along AA line;

[0030] Figure 11 Bronze slide, section along AA line;

[0031] Figure 12 Bronze slide, section along AA line;

[0032] Figure 13 Bronze slide, section along AA line; Figure 11 Bronze slide, section along AA line;

[0033] Figure 14 Bronze slide, section along AA line;

[0034] Figure 15 Bronze slide, section along AA line; Figure 14

[0035] Bronze slide, section along AA line; Figure 16

[0036] Bronze slide, section along AA line; Figure 17

[0037] Bronze slide, section along AA line; Figure 18

[0038] Bronze slide, section along AA line; Figure 19

[0039] Bronze slide, section along AA line; Figure 20

[0040] Bronze slide, section along AA line; Figure 21

[0041] Bronze slide, section along AA line; Figure 22

[0042] Bronze slide, section along AA line; Figure 23

[0043] Bronze slide, section along AA line; Figure 24

[0044] ​In the figure: 1, the moving contact lug; 11, the calibration base plate; 12, the calibration base; 13, the first screw hole; 21, the pin base; 22, the positioning pin; 23, the second screw hole; 3, the universal base sleeve; 31, the first countersunk hole; 32, the base sleeve cavity; 33, the internal thread; 34, the first countersunk screw; 4, the armature; 41, the second countersunk hole; 42, the convex column; 43, the second countersunk screw; 51, the bronze sliding platform; 52, the sliding rail; 53, the sliding platform through hole; 54, the external thread; 6, the rotary table sleeve; 61, the sliding groove; 62, the center through hole; 63, the cavity side wall; 64, the rotary table sleeve thread; 65, the rotary table cavity; 71, the iron core base plate; 72, the cylindrical iron core; 73, the first lead sheath through hole; 81, the framework; 82, the framework through hole; 83, the lead sheath; 84, the coil; 9, the rotary table body; 91, the limiting shoulder; 92, the second lead sheath through hole; 93, the internal blind hole; 94, the external screw; 95, the shaft hole; 96, the radial hole; 97, the set screw; 101, the static contact base plate; 102, the static contact outer ring; 103, the static contact inner ring; 104, the static contact base plate through hole; 105, the first contact pad; 111, the dynamic contact base plate; 112, the dynamic contact outer ring; 113, the dynamic contact inner ring; 114, the dynamic contact base plate through hole; 115, the elastic contact; 116, the second contact pad; 120, the motor; 130, the swing arm; 10, the static contact lug. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present application are described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the scope of protection of the present application is more clearly defined.

[0046] Referring to the accompanying drawings Figures 1-24 As shown in the figure, the electromagnetic positioning structure of the calibration, earmark and mold scanning base plate in the embodiment includes a calibration assembly or pin assembly, a universal base sleeve 3 and a bronze sliding platform 51, and a rotary table assembly. The lower surface of the calibration assembly or pin assembly is provided with a plurality of screw holes. The universal base sleeve 3 is in the shape of an inverted cup, has a base sleeve cavity 32, and the side wall of the base sleeve cavity 32 is provided with an internal thread 33, and the bottom is provided with a plurality of first countersunk holes 31. The universal base sleeve 3 is connected with the calibration assembly or pin assembly through a first countersunk screw 34, the first countersunk screw 34 is screwed through the first countersunk hole 31 and the screw hole. The top end of the rotary table assembly is provided with an arc-shaped sliding groove 61. The bronze sliding platform 51 is in the shape of a cylinder, the lower surface is connected with an arc-shaped sliding rail 52, the upper surface abuts against an armature 4, the side surface is provided with an external thread 54, and the external thread 54 is screwed with the internal thread 33. The sliding rail and the sliding groove are matched and fitted in shape, and the sliding rail is inserted into the sliding groove. An electromagnet is arranged in the rotary table assembly, and the electromagnet attracts the armature 4. A plurality of through assembly process holes 55 are arranged on the bronze sliding platform 51, and the assembly process holes 55 are arranged on the outer side of the sliding rail 52.

[0047] If a permanent magnet is used to attract the turntable assembly to the armature 4 in the universal base sleeve 3, the slide rail can be automatically inserted into the slide groove. When the front end of the slide rail abuts the bottom end of the slide groove, the assembly is complete. However, when disassembling the universal base sleeve 3, excessive force is often used to overcome the magnetic attraction of the permanent magnet, often resulting in the positioning pin 22 piercing the arm or the calibration plate 11 hitting the arm. When the electromagnet is de-energized, the magnetic attraction disappears, and the universal base sleeve 3 can be easily removed without applying excessive force, preventing injury to the operator.

[0048] To enhance the attraction of the electromagnet to the armature 4, the present invention is further configured as follows: the armature 4 includes a cylindrical body and a protruding post 42, the radius of the protruding post 42 being smaller than the radius of the body, and the edge of the body being provided with a plurality of second countersunk holes 41; the bronze slide 51 is provided with a slide through hole 53 in the middle, and the protruding post 42 extends into the slide through hole 53; the armature 4 is connected to the universal base sleeve 3 by a second countersunk screw 43, the second countersunk screw 43 passing through the second countersunk hole and screwed into the universal base sleeve 3.

[0049] To facilitate the installation of the electromagnet, the present invention is further configured as follows: the turntable assembly includes a turntable sleeve 6 and a turntable body 9. The turntable sleeve 6 is in the shape of an inverted cup. A central through hole 62 is provided at the bottom of the turntable sleeve 6. The turntable sleeve 6 has a turntable cavity 65. The electromagnet is disposed in the turntable cavity 65. The side wall 63 of the cavity is provided with a turntable sleeve thread 64. The sliding groove is provided on the top surface of the bottom of the turntable sleeve 6. The turntable body 9 includes an upper part and a lower part. The lower end side of the upper part is connected to a limiting shoulder 91. The side of the upper part is provided with an external thread 94, which is screwed into the turntable sleeve thread 64. The lower part has a shaft hole 95 around its central axis. The output shaft of the motor 120 is inserted into the shaft hole 95. The lower part has a radial hole 96 in the radial direction. The radial hole 96 is perpendicular to the shaft hole 95. A set screw 97 is screwed into the radial hole 96. The top of the set screw 97 abuts against the output shaft of the motor 120. 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.

[0050] To prevent the universal base sleeve 3 from detaching from the turntable assembly after the electromagnet is de-energized, the present invention is further configured as follows: the electromagnet includes an "I"-shaped frame 81, with a coil 84 wound around the middle of the frame 81, and a frame through hole 82 arranged around the central axis of the frame 81; a cylindrical iron core 72 is arranged in the frame through hole 82, and the lower end of the cylindrical iron core 72 is connected to an iron core base 71, which is connected to the upper part. When the electromagnet is energized, the iron core is magnetized; when the electromagnet is de-energized, the iron core can retain a weak magnetism and continue to exert an attractive force on the armature 4.

[0051] In order to facilitate power supply to the electromagnet, the application is further provided with: the coil 84 is connected with a lead wire; a plurality of lead wire sheaths 83 are arranged on the lower end of the framework 81, and the lead wire penetrates through the lead wire sheaths 83; the edge of the core base 71 is provided with a first lead wire sheath through hole 73; the upper portion is provided with a second lead wire sheath through hole 92, and the lead wire sheaths 83 penetrate through the first lead wire sheath through hole 73 and the second lead wire sheath through hole 92 in sequence.

[0052] In order to facilitate power supply to the electromagnet in rotation, the application is further provided with: the rotating table assembly further comprises a flat brush conductive mechanism, the flat brush conductive mechanism comprising a static contact piece 10 and a dynamic contact piece 1,

[0053] The static contact piece 10 comprises a static contact base plate 101, a static contact outer ring 102, a static contact inner ring 103 and a pair of first contact pads 105, the middle part of the static contact base plate 101 is provided with a static contact base plate through hole 104, the static contact outer ring 102 and the static contact inner ring 103 are conductive rings in full circle closed loop; the static contact outer ring 102 and the static contact inner ring 103 are insulated from each other; the static contact outer ring 102 and the static contact inner ring 103 are concentric circles; the static contact outer ring 102 and the static contact inner ring 103 are respectively connected with a first contact pad 105;

[0054] The dynamic contact piece 1 comprises a dynamic contact base plate 111, a dynamic contact outer ring 112, a dynamic contact inner ring 113, an elastic contact 115 and a pair of second contact pads 116, the middle part of the dynamic contact base plate 111 is provided with a dynamic contact base plate through hole 114, the dynamic contact outer ring 112 and the dynamic contact inner ring 113 are conductive rings in full circle closed loop; the dynamic contact outer ring 112 and the dynamic contact inner ring 113 are insulated from each other; the dynamic contact outer ring 112 and the dynamic contact inner ring 113 are concentric circles; the dynamic contact outer ring 112 and the dynamic contact inner ring 113 are respectively connected with a second contact pad 116,

[0055] The size and width of the static contact outer ring 102 and the static contact inner ring 103 are the same as those of the dynamic contact outer ring 112 and the dynamic contact inner ring 113 respectively, the distribution positions of the static contact outer ring 102 and the static contact inner ring 103 correspond to those of the dynamic contact outer ring 112 and the dynamic contact inner ring 113 respectively, and the dynamic contact outer ring 112 and the dynamic contact inner ring 113 are connected with the static contact outer ring 102 and the static contact inner ring 103 through the elastic contact 115 respectively.

[0056] The application is further provided with: the motor 120 is fixedly connected on the swing arm 130, and the output shaft of the motor 120 penetrates through the swing arm 130; the static contact piece 10 is connected on the upper surface of the swing arm 130, and the dynamic contact piece 1 is connected on the lower surface of the rotating table.

[0057] The further setting of the application is that the calibration assembly comprises a calibration base plate 11 and a calibration base 12 connected to the lower surface of the calibration base plate 11, and a plurality of first screw holes 13 are arranged on the calibration base 12, and the first countersunk head screw 34 is screwed with the first screw hole 13 through the first countersunk head hole 31.

[0058] The further setting of the application is that the pin assembly comprises a pin base 21 and a positioning pin 22, and the lower surface of the pin base 21 is provided with a plurality of second screw holes 23, and the first countersunk head screw 34 is screwed with the second screw hole 23 through the first countersunk head hole 31.

[0059] In summary, the use method of the electromagnetic positioning structure of the calibration and earprint mold scanning abutment shown in the application is that the bottom surface of the iron core disc abuts against the top surface of the rotary table body 9; the countersunk head screw passes through the iron core disc and the internal thread blind hole 93 at the top end of the rotary table body 9 to be screwed.

[0060] The skeleton 81 is wound with an electromagnetic coil 84, is sleeved on the cylindrical iron core 72, and the top end surface of the cylindrical iron core 72 is flush with the top end surface of the rotary table sleeve 6; the lead wire is led out from the lead wire sheath 83; and the lead wire sheath 83 passes through the lead wire sheath 83 perforation on the iron core bottom disc 71 and the rotary table body 9.

[0061] The external thread screw 94 is screwed with the internal thread screw 33, is screwed tightly, is assembled in place, the rotary table sleeve 6 is screwed with the rotary table body 9, and stops at the limiting shoulder 91.

[0062] The movable joint base plate through hole 114 is sleeved into the top end of the lower part and is fixed at the back of the upper part; the movable joint outer ring 112 and the movable joint inner ring 113 face downward; the lead wire is led out from the lead wire sheath 83 and is welded on the second wire bonding pad 116 of the movable joint outer ring 112 and the movable joint inner ring 113 respectively.

[0063] The static joint sheet 10 is fixed on the side of the swing arm 130 facing upward; the static joint outer ring 102 and the static joint inner ring 103 face upward; the output shaft of the motor 120 passes through the static joint base plate through hole 104. The lead wire is led out from the static joint outer ring 102 and the static joint inner ring 103 and directly passes through the control loop.

[0064] The motor 120 is fixed on the side of the swing arm 130 facing downward; the shaft of the motor 120 passes through the swing arm 130, the center hole of the static joint sheet 10, and the central shaft hole 95 of the rotary table body 9; and then is fixed through the locking screw 97.

[0065] The electromagnet attracts the armature 4, so that the sliding rail is automatically inserted into the sliding groove and slides from shallow to deep to automatically return to the original position. The principle of slope and the attraction of electromagnet are used, and the sliding rail can only slide along the groove rail, which is labor-saving, time-saving and efficient. The assembly and disassembly are simple and convenient. The bronze has a small friction coefficient and a self-lubricating effect. The sliding resistance is smaller. It is especially suitable for the application as the material for manufacturing the sliding rail and the sliding table.

[0066] The outer diameter of the armature 4 and the bronze sliding platform 51 is slightly smaller than the inner diameter of the base sleeve 32; the outer diameter of the rotating sleeve 6 is slightly smaller than the inner diameter of the base sleeve 32; and the most protruding point of the sliding rail is retracted into the inner cavity 32 of the base sleeve, which can limit and align, and is beneficial to assembly in place.

[0067] When the coil 84 is connected to a direct current power supply, the electromagnetic coil 84 has current flowing through to generate an electromagnetic effect, forming a strong magnetic field, and the iron core covered by the coil 84 is magnetized to generate strong magnetic attraction. The magnetic field generated by the magnetization of the iron core, together with the original magnetic field in the coil 84, greatly enhances the total magnetic field strength, so the magnetic force of the electromagnet is greater than that of a natural magnet.

[0068] During calibration or scanning, the motor 120 drives the rotating table body 9 to rotate, and since the electromagnet rotates synchronously, the conductive structure of the flat brush can well power the rotating electromagnet. The elastic contact 115 of the movable outer ring 112 and the movable inner ring 113 abuts against the static outer ring 102 and the static inner ring 103, and the static outer ring 102 and the static inner ring 103 supply power to the movable outer ring 112 and the movable inner ring 113 rotating in the horizontal direction, realizing electrical connection. The elastic contact 115 is made of phosphor copper, and has a certain curvature to maintain good elasticity.

[0069] The present application is different from the general overall structure design, only one universal base sleeve 3 is designed, and the calibration assembly is assembled to form a calibration base; and the pin assembly is assembled to form a scanning base. The universal base sleeve 3 is matched with two-pin bases for single-ear impression scanning, and is matched with four-pin bases for double-ear impression scanning. The above can share the same universal base sleeve 3 for interchange; or the universal base sleeve 3 can be matched respectively, highlighting the versatility, interchangeability and flexibility of the design.

[0070] 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 a calibration and ear impression scanning base, comprising a calibration component or pin assembly, a universal base sleeve and a bronze slide, and a turntable assembly; the lower surface of the calibration component or pin assembly 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 sidewall of the inner cavity being provided with internal threads, 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 assembly by first countersunk screws, the first countersunk screws 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 groove; characterized in that The bronze slide is cylindrical in shape, with an arc-shaped slide rail connected to the lower surface and an armature pressed against the upper surface. The side is provided with an external thread, 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 which is smaller than that of the body; the bronze slide has a slide through hole in the middle, and the protruding post extends into the slide 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 electromagnetic positioning structure for a calibrated, ear impression scan abut according to claim 1, wherein, The armature is connected to the universal base sleeve by a second countersunk screw, which passes through the second countersunk hole and is screwed into the universal base sleeve.

3. The electromagnetic positioning structure for a calibrated, ear impression scan abut according to claim 2, wherein, 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. The turntable sleeve has an inner cavity, in which the electromagnet is disposed. The inner cavity sidewall is provided with a turntable sleeve thread, and the slide groove is provided 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 side of the upper part is connected to a limiting shoulder, and the side of the upper part is provided with external threads, which are screwed into the turntable sleeve thread. The lower part has a shaft hole around its central axis, in which the output shaft of the motor is inserted. The lower part has a radial hole in the radial direction, which is perpendicular to the shaft hole. A set screw is screwed into the radial hole, and the top of the set screw abuts against the output shaft of the motor.

4. The electromagnetic positioning structure for a calibrated, ear impression scan abut according to claim 3, wherein, The lower end of the cylindrical iron core is connected to the iron core chassis, and the iron core chassis is connected to the upper part.

5. The electromagnetic positioning structure for a calibrated, ear impression scan abut according to claim 4, wherein, 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, and the lead wire sheath passes through the first lead wire sheath through hole and the second lead wire sheath through hole in sequence.

6. The electromagnetic positioning structure for a calibrated, ear impression scan abut according to claim 5, wherein, The turntable assembly also includes a conductive mechanism for a planar brush, which comprises a stationary contact plate and a moving contact plate. 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 contact piece comprises a movable contact substrate, a movable contact outer ring, a movable contact inner ring, an elastic contact and a pair of second contact pads, a movable contact substrate through hole is formed in the middle part of the movable contact substrate, the movable contact outer ring and the movable contact inner ring are conductive rings in full circle closed loop; the movable contact outer ring and the movable contact inner ring are insulated from each other; the movable contact outer ring and the movable contact inner ring are concentric circles; the movable contact outer ring and the movable contact inner ring are respectively connected with a second contact pad, The size and width of the static contact outer ring and the static contact inner ring are the same as those of the movable contact outer ring and the movable contact inner ring, respectively, and the distribution positions of the static contact outer ring and the static contact inner ring correspond to those of the movable contact outer ring and the movable contact inner ring, respectively; the movable contact outer ring and the movable contact inner ring are connected with the static contact outer ring and the static contact inner ring through the elastic contact, respectively.

7. The electromagnetic positioning structure for a calibrated, ear impression scan abut according to claim 6, wherein, The motor is fixedly connected to the swing arm, and the output shaft of the motor penetrates the swing arm; the static contact piece is connected to the upper surface of the swing arm, and the movable contact piece is connected to the lower surface of the turntable.

8. The electromagnetic positioning structure for a calibrated, ear impression scan abut according to claim 1, wherein, The calibration assembly comprises a calibration substrate and a calibration base, the calibration base is connected to the lower surface of the calibration substrate, a plurality of first screw holes are arranged on the calibration base, and the first countersunk head screw is screwed with the first countersunk head through hole and the first screw hole.

9. The electromagnetic positioning structure for a cast, ear impression scan base, according to claim 1, wherein, The pin assembly comprises a pin base and a positioning pin, a plurality of second screw holes are arranged on the lower surface of the pin base, and the first countersunk head screw is screwed with the first countersunk head through hole and the second screw hole.

10. The electromagnetic positioning structure for a cast, ear impression scan base, according to claim 1, wherein, A plurality of through assembly process holes are arranged on the bronze sliding table, and the assembly process holes are arranged on the outer side of the sliding rail.

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