Charging interface connecting structure and oral cavity digital impression instrument

Abstract

The invention relates to a charging interface connecting structure and an oral cavity digital impression instrument. The charging interface connecting structure comprises an elastic connector and a power panel arranged on a tail cover assembly of the oral cavity digital impression instrument, and the elastic connector is electrically connected with external power supply equipment through a power supply connecting port arranged on the power panel; a mainboard connecting piece at one end of the flexible printed circuit board is electrically connected with the mainboard through a mainboard interface of the mainboard of the oral cavity digital impression instrument, and a charging interface board at the other end of the flexible printed circuit board is provided with a contact piece electrically connected with the elastic connector. The elastic connector is arranged on the tail cover assembly, the flexible printed circuit board is arranged in the shell of the oral cavity digital impression instrument, and the elastic connector and the flexible printed circuit board can be electrically connected only by assembling the tail cover assembly and the shell. Therefore, poor charging or charging failure caused by the fact that the cable is pulled off or loosened and the cable is flattened due to the fact that the cable is connected between the tail cover and the shell can be avoided. The assembling operability is optimized, and the yield of finished products is improved.

Description

Technical Field

[0001] The invention relates to a charging interface connection structure and an oral digital impression instrument using the charging interface connection structure. Background Art

[0002] In recent years, with the long-term development of digitalization in dental laboratories, the application of oral digital impression devices in dental clinics has become more and more common. For small handheld devices, wirelessization gets rid of the constraints of cables, so that doctors and patients are not disturbed by cables when using them, which greatly improves the user experience. It is foreseeable that wireless oral digital impression devices will gradually replace traditional wired oral digital impression devices in the next few years.

[0003] For wired products, the tail cover only serves to prevent dust and fix the cable. When assembling, just tighten the two screws. Because wireless products do not use cable power supply, the charging structure needs to be redesigned.

[0004] For wireless products, since the tail cover also integrates the function of the product charging interface, there must be a cable connection between the charging interface board of the tail cover and the main board. The tail cover is the last part to be assembled. During the disassembly and assembly process, the cables of the charging interface board are invisible and cannot be adjusted. This may cause the following four undesirable conditions: 1) The cable is pulled off or loose, resulting in failure to charge; 2) The cable is flattened, resulting in poor charging or failure to charge; 3) During the rework process, the cable is broken during the disassembly process, increasing the rework cost; 4) The cable status cannot be controlled and is easy to leak out from the ventilation hole, affecting the appearance. Summary of the invention

[0005] The present invention is made to solve the above-mentioned technical problems, and its purpose is to provide a charging interface connection structure and an oral digital impression instrument using the charging interface connection structure, which can optimize the operability of assembly and improve the yield of finished products.

[0006] One embodiment of the present invention relates to a charging interface connection structure, which is applied to an oral digital impression instrument, comprising: an elastic connector, which is arranged on a power board of a tail cover assembly of the oral digital impression instrument and can be electrically connected to an external power supply device via a power connection port arranged on the power board; and a flexible printed circuit board, wherein a mainboard connector at one end of the flexible printed circuit board is electrically connected to the mainboard via a mainboard interface of the mainboard of the oral digital impression instrument, and a charging interface board at the other end of the flexible printed circuit board is provided with a contact for electrically connecting to the elastic connector.

[0007] As the charging interface connection structure of the present invention, an elastic connector and a flexible printed circuit board are used to achieve electrical connection, wherein the elastic connector is arranged in the tail cover assembly, and the flexible printed circuit board is arranged in the housing of the oral digital impression instrument. The electrical connection between the elastic connector and the flexible printed circuit board can be achieved by simply assembling the tail cover assembly and the housing. Compared with the previous method of connecting a cable between the charging interface board of the tail cover assembly and the main board, it can prevent the cable from being pulled off or loosened, the cable from being flattened, etc., resulting in poor charging or failure to charge. The operability of the assembly is optimized, and the yield rate of the finished product is improved.

[0008] Preferably, the elastic connector is configured as a spring pin, and at least two spring pins are provided.

[0009] The elastic connector of the present invention is configured as a spring ejector pin, which can be extended and pressed back, and can absorb manufacturing tolerances to achieve a stable connection with a flexible printed circuit board.

[0010] Another embodiment of the present invention relates to an oral digital impression instrument, comprising: a charging interface connection structure; a shell, the shell being a hollow structure formed by combining a first shell and a second shell; and a tail cover assembly, the tail cover assembly being combined with the shell by threaded fastening.

[0011] According to the oral digital impression instrument of this structure, the electrical connection between the elastic connector and the flexible printed circuit board can be achieved by simply tightening the tail cover assembly and the shell thread. Compared with the previous method of connecting a cable between the charging interface board of the tail cover assembly and the main board, it can avoid the cable being pulled off or loosened, the cable being flattened, etc., resulting in poor charging or failure to charge. The assembly operability of the oral digital impression instrument is optimized, and the finished product yield is improved.

[0012] Ideally, a bracket is provided on the inner side surface of the first shell of the oral digital impression instrument at a position close to the tail cover assembly so as to protrude toward the second shell, and a pressure strip protruding toward the first shell is provided on the inner side surface of the second shell of the oral digital impression instrument at a position corresponding to the bracket, and the contact piece of the flexible printed circuit board is installed and positioned through the abutment between the bracket and the pressure strip.

[0013] According to the oral digital impression instrument of this structure, the charging interface board of the flexible printed circuit board is pressed by the bracket of the first shell and the pressure strip of the second shell when the first shell and the second shell are assembled. No other fixation is required during the installation process, and the assembly process is simple.

[0014] In addition, a notch is provided at a position on the bracket corresponding to the elastic connector, through which the contact piece of the charging interface board of the flexible printed circuit board is exposed, and a receiving groove is formed in the bracket, which is used to receive the charging interface board of the flexible printed circuit board.

[0015] According to this structure, the contact piece of the flexible printed circuit board can be further installed and positioned, and the elastic connector and the flexible printed circuit board can be stably connected.

[0016] Ideally, the pressure strip includes a guide portion and a pressing portion, the guide portion is arranged in a manner of protruding from the inner side surface of the second shell toward the first shell, and the pressing portion is arranged between the two guide portions. The charging interface board and the contact piece of the flexible printed circuit board are installed and positioned by abutting the pressing portion of the pressure strip against the end surface of the bracket.

[0017] According to the molding with this structure, the guide portion can be used to guide the pressing portion so that the pressing portion can abut against the bracket, thereby enabling smooth installation.

[0018] In addition, the oral digital impression instrument also includes a fan support, the flange of which is tightly matched with the inner side surfaces of the first shell and the second shell, and a circuit board through hole is arranged on the flange, and the circuit board through hole is for the flexible printed circuit board to pass through.

[0019] By setting a circuit board through hole on the fan support, the soft cable of the flexible printed circuit board can be assisted in positioning to prevent the soft cable from being flattened by the shell during the assembly process. At the same time, the soft cable is controlled not to appear in the field of view of the tail cover air duct, so as not to hinder the air flow and avoid the appearance problems caused by the leakage of the soft cable.

[0020] Preferably, a circuit board fixing portion is further provided on the flange, and the circuit board fixing portion is protrudingly provided on a surface of the flange facing the housing so as to surround the circuit board through hole.

[0021] By further providing a circuit board fixing portion on the fan support, the reinforcing plate of the flexible printed circuit board can be fixed, and the flexible flat cable of the flexible printed circuit board can be further assisted in positioning to prevent the flexible flat cable from being crushed by the shell during assembly.

[0022] In addition, the tail cover assembly includes a tail cover, a sealing foam and a power board, a plurality of air vents are formed circumferentially in the outer peripheral area of ​​the tail cover, the sealing foam is clamped between the tail cover and the power board, the power board includes a substrate, the power connection port, a plurality of the elastic connectors and a connector base, the power connection port is arranged on the surface of the substrate facing the tail cover, the connector base is arranged on the surface of the substrate facing the shell, and a plurality of the elastic connectors are protruding from the connector base.

[0023] According to the tail cover assembly of this structure, the power board provided with the elastic connector can be integrated into the tail cover assembly, and waterproofing is performed and movement of the power board is restricted by sealing foam.

[0024] Ideally, the tail cover assembly also includes a pressure plate, and a protective portion is provided at a position of the pressure plate body of the pressure plate corresponding to the connector base of the power board. The protective portion is provided in a manner of protruding from the surface of the pressure plate toward the shell, and the protruding height is set to be higher than the height of the connector base and lower than the height of the elastic connector by a specified amount.

[0025] By arranging the protection part on the pressing plate, the elastic connector can be protected, and the elastic connector can be prevented from being damaged due to excessive squeezing, and the contact between the elastic connector and the flexible printed circuit board will not be hindered. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a partial side view of an oral digital impression device to which the charging interface connection structure according to the embodiment of the present invention is applied.

[0027] Figure 2 It is an exploded view showing the structure of an oral digital impression device to which the charging port connection structure according to the embodiment of the present invention is applied.

[0028] Figure 3 The figure is an exploded perspective view showing the structure of a tail cover assembly of an oral digital impression device according to an embodiment of the present invention.

[0029] Figure 4 The figures show the assembled state of the tail cover assembly of the oral digital impression device according to the embodiment of the present invention, (a) is a figure viewed from the housing side, and (b) is a sectional view taken along the line NN of (a).

[0030] Figure 5 3. The drawings are diagrams showing the fixing structure of the flexible printed circuit board of the charging interface connection structure of the oral digital impression instrument according to the embodiment of the present invention, wherein (a) is a diagram observed from the side of the tail cover assembly, and (b) is an exploded view of (a).

[0031] Figure 6It is a perspective view showing the structure of a first housing of the oral digital impression device according to the embodiment of the present invention.

[0032] Figure 7 It is a perspective view showing the structure of a second housing of the oral digital impression device according to the embodiment of the present invention.

[0033] Figure 8 It is a perspective view showing the structure of a flexible printed circuit board of a charging interface connection structure of an oral digital impression device according to an embodiment of the present invention.

[0034] Fig. 9 1 is a diagram showing a fan support of an oral digital impression device according to an embodiment of the present invention, (a) is a three-dimensional Figure 1 , (b) is a three-dimensional Figure 2 .

[0035] Fig.10 1 and 2 are diagrams showing the structure of a power board of an oral digital impression device according to an embodiment of the present invention, wherein (a) is a left side view and (b) is a right side view.

[0036] Fig.11 1 and 2 are diagrams showing the structure of a pressing plate of an oral digital impression device according to an embodiment of the present invention, wherein (a) is a left side view and (b) is a side view of (a).

[0037] (Explanation of symbols)

[0038] 10Flexible Printed Circuit Board

[0039] 11 Charging interface board

[0040] 12 Motherboard connectors

[0041] 13 Reinforcement plate

[0042] 20 tail cover assembly

[0043] 21 tail cover

[0044] 211 tail cover

[0045] 212 Installation Department

[0046] 213 tail cover storage

[0047] 214 Installation guide

[0048] 215 Positioning riveting part

[0049] 216 first through hole

[0050] 22 Sealing foam

[0051] 221 second through hole

[0052] 222 first positioning hole

[0053] 23 Power board

[0054] 231 substrate

[0055] 232 power connector

[0056] 233 spring ejector pin

[0057] 234 Connector Base

[0058] 235 second positioning hole

[0059] 24 pressure plate

[0060] 241 Platen body

[0061] 242 Protection Department

[0062] 243 positioning mounting hole

[0063] 30 Fan

[0064] 40 Fan support

[0065] 401 Circuit Board Through Hole

[0066] 402 tubular body

[0067] 403 flange

[0068] 404 base plate

[0069] 406 circuit board fixing part

[0070] 407 fan support mounting hole

[0071] 50 Motherboard

[0072] 51 motherboard interface

[0073] 60 support frame

[0074] 70 Shell

[0075] 71 First Shell

[0076] 711 Bracket

[0077] 72 Second Shell

[0078] 721 layering DETAILED DESCRIPTION

[0079] In order to more clearly illustrate the technical solution of the present invention, the specific implementation of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementations can be obtained based on these drawings without creative work.

[0080] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0081] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] First, refer to Figure 1 and Figure 2 The general structure of the tail of the oral digital impression device according to the embodiment of the present invention is described. For the convenience of description, in each drawing, the axial front-to-back direction of the oral digital impression device is set as the X direction, the radial direction of the oral digital impression device is set as the Y direction, and the direction perpendicular to both X and Y is set as the Z direction.

[0083] like Figure 1 , Figure 2 As shown, the oral digital impression instrument according to the embodiment of the present invention generally comprises a flexible printed circuit board 10 , a tail cover assembly 20 , a fan 30 , a fan support 40 , a main board 50 , a support frame 60 and a housing 70 .

[0084] like Figure 5 As shown, the housing 70 is constituted as a structure composed of a first housing 71 and a second housing 72, and as an example, is formed into a hollow roughly cylindrical structure. The support frame 60 is arranged inside the housing 70, and is used to support internal components such as batteries, fans, and photoelectric elements. The main board 50 is arranged on the support frame 60, and is used to perform various controls and electrical connections of the oral digital impression instrument. The fan support 40 is used to support and enclose the fan 30, and separate the fan 30 from the support frame 60. The support frame 60, the main board 50, the fan support 40 and the fan 30 are all installed in the housing 70.

[0085] like Figure 3 As shown, the tail cover assembly 20 includes a tail cover 21 , a sealing foam 22 , a power board 23 and a pressing plate 24 .

[0086] The tail cover 21 is formed into a shape corresponding to the outer shape of the housing 70, including a tail cover plate 211, a mounting portion 212, a tail cover receiving portion 213, a mounting guide portion 214, a positioning riveting portion 215 and a first through hole 216. The tail cover plate 211 is formed into a substantially elliptical plate shape, and a plurality of air ports are formed circumferentially in an area close to the periphery, for inhaling or exhausting gas when the fan 30 is driven. In an area close to the periphery of the tail cover plate 211, at least two (here illustrated as two) mounting portions 212 are symmetrically arranged circumferentially at positions other than the air ports, and the mounting portions 212 are screwed in for mounting screws to fix the tail cover assembly 20 to the housing 70. A tail cover receiving portion 213 is formed in the center of the tail cover plate 211, and the tail cover receiving portion 213 is used to receive the sealing foam 22, the power board 23 and the pressure plate 24. In addition. A first through hole 216 is formed at the center of the tail cover receiving portion 213, and the power connection port 232 of the power board 23 is inserted into the first through hole 216 to connect with an external power supply device. In addition, at least two (two are shown in this example) installation guides 214 are provided in the area near the periphery of the tail cover receiving portion 213, and the installation guides 214 are provided in a symmetrical position along the circumferential direction in a manner protruding toward the housing 70, and are used to position the sealing foam 22 and the power board 23. In addition, at least two (four are shown in this example) positioning rivets 215 are provided in the area near the periphery of the tail cover receiving portion 213, and the positioning rivets 215 are provided approximately evenly along the circumferential direction and are provided in a manner protruding toward the housing 70, and are used to position and rivet the pressure plate 24.

[0087] The sealing foam 22 is formed into a shape corresponding to the tail cover storage portion 213. A second through hole 221 is formed in the center of the sealing foam 22, and the power connection port 232 of the power board 23 is inserted through the second through hole 221 to connect with an external power supply device. A first positioning hole 222 is provided at a position corresponding to the installation guide portion 214 on the outside of the second through hole 221. The installation guide portion 214 is passed through the first positioning hole 222, thereby achieving the positioning and installation of the sealing foam 22. By providing the sealing foam 22, it is possible to waterproof and limit the movement of the power board 23 in the X direction.

[0088] The power board 23 is formed into a shape corresponding to the tail cover receiving portion 213. Figure 3 and Fig.10As shown in (a) and (b), the power board 23 includes a substrate 231, a power connection port 232, a spring pin 233 as an elastic connector, a connector base 234 and a second positioning hole 235. The power connection port 232 is provided on the surface of the substrate 231 facing the tail cover 21, and the connector base 234 and the spring pin 233 are provided on the surface of the substrate 231 facing the housing 70, and the spring pin 233 is electrically connected to the power connection port 232. The connector base 234 is formed in an elliptical shape for supporting and protecting the spring pin 233. At least two spring pins 233 are protrudingly provided on the connector base 234, and the spring pin 233 is configured to be able to extend and press back. By providing the spring pin 233, manufacturing tolerances can be absorbed and a stable connection with the flexible printed circuit board 10 can be achieved. In addition, a second positioning hole 235 is provided at a position of the substrate 231 corresponding to the mounting guide portion 214. The installation guide portion 214 is passed through the first positioning hole 222 and the second positioning hole 235 in sequence, thereby realizing the positioning of the sealing foam 22 and the power board 23 relative to the tail cover 21 .

[0089] The pressing plate 24 is formed into a shape that is one circle larger than the power board 23 and the sealing foam 22. A protective portion 242 is provided at a position of the pressing plate body 241 corresponding to the connector base 234 and the spring ejector pin 233 of the power board 23. The protective portion 242 is provided in a manner of protruding from the surface of the pressing plate 24 facing the housing 70, and the protruding height is set to be higher than the height of the connector base 234 and lower than the height of the spring ejector pin 233 by a specified amount. By providing the protective portion 242, the spring ejector pin 233 can be protected to prevent the spring ejector pin 233 from being damaged by excessive squeezing, and the contact between the spring ejector pin 233 and the flexible printed circuit board 10 will not be hindered. In addition, a positioning installation hole 243 is provided at a position of the pressing plate body 241 corresponding to the positioning rivet portion 215, and the positioning installation hole 243 is passed through by the positioning rivet portion 215 of the tail cover 21. By passing the positioning riveting portion 215 through the positioning mounting hole 243 and performing riveting fixation, the pressing plate 24 is fixed relative to the tail cover 21 , thereby completing the installation of the tail cover assembly 20 .

[0090] The fan support 40 is integrally formed of an elastic material such as a silicone material. Fig. 9As shown in (a) and (b), it includes a cylindrical body 402, a flange 403 and a base plate 404. The cylindrical body 402 is used to enclose the fan 30 therein. The flange 403 is located at one end of the cylindrical body 402 and extends radially outward from the cylindrical body 402, and is used to fit tightly with the inner side of the housing 70. The base plate 404 is located at the other end of the cylindrical body 402 opposite to the flange 403, and is provided with a central opening of the base plate for air circulation. The two end faces of the base plate 404 are respectively fitted with the end faces of the support frame 60 and the end faces of the fan 30. At least two fan support mounting holes 407 are provided on the base plate 404, and at least two through holes are also provided at the corresponding positions of the fan 30, and are fixed to the corresponding fastening holes on the end face of the support frame 60 by fasteners (not shown) passing through the corresponding through holes on the fan 30 and the corresponding fan support mounting holes 407 on the base plate 404 in sequence. Therefore, the fan 30, the fan support 40 and the support frame 60 are formed into an integrated structure by the fasteners and the corresponding fan support mounting holes / fastening holes, rather than loose separate parts. Therefore, the above structural design can effectively reduce the vibration of the fan 30, reduce noise, and reduce the probability of equipment failure. In addition, since the flange 403 divides the internal space of the housing 70 into a first internal space and a second internal space, the front and rear pressure difference of the fan 30 is increased, and the air flow generated by the fan 30 will not form eddy currents or turbulence in the internal space of the housing 70, but is precisely guided to the central opening of the base plate, and further precisely guided to the heat source device area, thereby effectively dissipating heat from the heat source device area and reducing the probability of equipment failure. In addition, the flange 403 also includes a convex rib 403a located radially outside thereof. Through the design of the convex rib 403a, the flange 403 of the fan support 40 can be further closely matched with the inner side of the housing 70, and the installation resistance is greatly reduced. Preferably, the cross section of the convex rib 403a is roughly triangular, which is further conducive to close matching with the inner side of the housing 70. In addition, a circuit board through hole 401 is provided on one side edge of the flange 403, and the circuit board through hole 401 is used for the flexible printed circuit board 10 to pass through. In addition, a circuit board fixing portion 406 is provided on the surface of the flange 403 facing the housing 70 in a manner of surrounding the circuit board through hole 401, and the circuit board fixing portion 406 is provided in a manner of protruding from the surface of the flange 403 facing the housing 70, and is used to fix the reinforcing plate 13 described later of the flexible printed circuit board 10 and limit the radial extension of the flexible printed circuit board 10. By providing the circuit board through hole 401 and the circuit board fixing portion 406 on the flange 403, the flexible flat cable of the flexible printed circuit board 10 can be assisted in positioning, and the flexible flat cable is controlled not to be pressed by the housing during the assembly process, and the flexible flat cable is controlled not to appear in the field of view of the tail cover air duct, and will not cause obstruction to the air flow.

[0091] like Figure 8As shown, the flexible printed circuit board 10 is installed on the outside of the support frame 60, including a charging interface board 11, a mainboard connector 12 and a reinforcement plate 13. Among them, the mainboard connector 12 is electrically connected to the mainboard interface 51 provided on the mainboard 50, and the contact piece 111 of the charging interface board 11 is used to electrically connect with the spring pin 233 of the power board 23. In addition, the charging interface board 11 and the mainboard connector 12 also play a role in reinforcing the flexible printed circuit board 10. The reinforcement plate 13 is located between the charging interface board 11 and the mainboard connector 12, and an ESD protection device is provided on the reinforcement plate 13. When the oral digital impression device is working, the air flow generated by the fan 30 is directed to the flexible printed circuit board 10, which can effectively dissipate the heat of the flexible printed circuit board 10 and reduce the probability of equipment failure.

[0092] like Figures 5 to 7 As shown, the housing 70 includes a first housing 71 (eg Figure 5 ) and a second housing 72 (eg, Figure 5 The first shell 71 and the second shell 72 are arranged opposite to each other, and the flange 403 of the fan support 40 is tightly matched with the inner side surface of the first shell 71 and the inner side surface of the second shell 72.

[0093] On the inner side surface of the first housing 71, a bracket 711 is provided at a position close to the tail cover assembly 20. The bracket 711 is provided in a manner of protruding from the inner side surface of the first housing 71 toward the second housing 72. A notch 711b is provided at a position corresponding to the spring ejector pin 233 and the connector base 234 of the power board 23 on the bracket 711. The notch 711b allows the contact member 111 of the charging interface board 11 of the flexible printed circuit board 10 to be exposed so as to be electrically connected to the spring ejector pin 233 of the power board 23. In addition, a receiving groove 711a is formed in the bracket 711. The receiving groove 711a is used to receive the charging interface board 11 of the flexible printed circuit board 10. Fixing portions 711c are provided at positions corresponding to the mounting portion 212 of the tail cover 21 on both sides of the bracket 711. As the last step of the assembly process of the oral digital impression instrument, when the tail cover assembly 20 is installed on the housing 70, the mounting screw is screwed into the mounting portion 212 of the tail cover 21 and then screwed into the fixing portion 711c, thereby fixing the tail cover assembly 20 to the housing 70.

[0094] On the inner side of the second housing 72, a pressure strip 721 is provided at a position corresponding to the bracket 711. The pressure strip 721 includes a guide portion 721a and a pressing portion 721b, wherein the two guide portions 721a are provided in a manner of protruding from the inner side of the second housing 72 toward the first housing 71, and the pressing portion 721b is arranged between the two guide portions 721a. After the charging interface board 11 of the flexible printed circuit board 10 is accommodated in the receiving groove 711a of the bracket 711 of the first housing 71 and the contact 111 of the charging interface board 11 is exposed from the notch 711b, the second housing 72 is installed toward the first housing 71 until the pressing portion 721b of the pressure strip 721 abuts against the end surface of the bracket 711. At this time, the charging interface board 11 of the flexible printed circuit board 10 is restricted in the receiving groove 711a, which can avoid the position deviation of the charging interface board 11 and ensure the stable electrical connection between the contact 111 and the spring ejector 233 of the power board 23.

[0095] The charging interface connection structure of the oral digital impression instrument according to the above structure and the oral digital impression instrument using the charging interface connection structure have the following technical effects:

[0096] 1) No cables need to be connected when assembling the tail cover assembly, which optimizes the assembly process and improves production efficiency and yield;

[0097] 2) The positioning accuracy requirements of the spring pin as an elastic connector and the charging interface board of the flexible printed circuit board are very low (in both plane directions and depth). No adjustment is required during the assembly process to ensure a stable connection between the spring pin and the charging interface board of the flexible printed circuit board.

[0098] 3) Since the flexible printed circuit board has been assembled before the first shell and the second shell are assembled (in a visible and adjustable state, and with a clear positioning structure), and the soft flat cable of the flexible printed circuit board is assisted in positioning by the circuit board through hole and the circuit board fixing part set on the fan support, the soft flat cable can be controlled not to be flattened by the shell during the assembly process, and at the same time, the soft flat cable is controlled not to appear in the field of view of the tail cover air duct, so as not to hinder the air flow and avoid the appearance problem caused by the leakage of the soft flat cable.

[0099] 4) The charging interface board of the flexible printed circuit board is pressed by the bracket of the first shell and the pressure strip of the second shell when the first shell and the second shell are assembled. No other fixing is required during the installation process, and the assembly process is simple.

[0100] It should be noted that the term "cylindrical" described herein is not limited to cylindrical, and its cross-sectional shape may also be square, rectangular, polygonal, etc. The term "tight fit" described herein means that when two parts are fitted, there is no gap between them, which can also be called "interference fit" or "interference fit". The term "fit" described herein means that the surfaces of two parts are in full contact with each other without any gap.

[0101] The above describes the embodiments of the present invention, but it should be understood that the present disclosure is not limited to the above embodiments and structures. The present disclosure also includes various modifications and variations within the equivalent range. In addition, various combinations and methods, and other combinations and methods including only one element, above or below them, also belong to the scope and thought range of the present disclosure.

Claims

1. A charging interface connection structure, applied to an oral digital impression device, characterized in that: include: An elastic connector (233), which is arranged on a power board (23) of a tail cover assembly (20) of the oral digital impression instrument and can be electrically connected to an external power supply device via a power connection port (232) arranged on the power board; as well as A flexible printed circuit board (10), wherein a mainboard connector (12) at one end of the flexible printed circuit board is electrically connected to the mainboard (50) via a mainboard interface (51) provided on the mainboard (50) of the oral digital impression device, and a charging interface board (11) at the other end of the flexible printed circuit board is provided with a contact piece (111) for electrically connecting to the elastic connector (233).

2. The charging interface connection structure according to claim 1, characterized in that: The elastic connector (233) is configured as a spring pin and is provided with at least two spring pins.

3. An oral digital impression device, characterized in that: include: The charging interface connection structure according to claim 1 or 2; A shell (70), wherein the shell is a hollow structure formed by combining a first shell (71) and a second shell (72); as well as A tail cover assembly (20) is combined with the housing (70) by means of threaded fastening.

4. The oral digital impression device according to claim 3, characterized in that: A bracket (711) is provided on the inner side surface of the first shell (71) of the oral digital impression instrument at a position close to the tail cover assembly (20) in a manner of protruding toward the second shell (72). A pressure strip (721) protruding toward the first shell (71) is provided at a position corresponding to the bracket (711) on the inner side surface of the second shell (72) of the oral digital impression instrument. The contact piece (111) of the flexible printed circuit board (10) is installed and positioned by abutting the bracket (711) and the pressure strip (721).

5. The oral digital impression device according to claim 4, characterized in that: A notch (711b) is provided at a position on the bracket (711) corresponding to the elastic connector (233), and the notch (711b) allows the contact piece (111) of the charging interface board (11) of the flexible printed circuit board (10) to be exposed, and a receiving groove (711a) is formed in the bracket (711), and the receiving groove is used to receive the charging interface board (11) of the flexible printed circuit board (10).

6. The oral digital impression device according to claim 4 or 5, characterized in that: The pressure strip (721) includes a guiding portion (721a) and a pressing portion (721b), wherein the guiding portion (721a) is arranged to protrude from the inner side surface of the second shell (72) toward the first shell (71), and the pressing portion (721b) is arranged between the two guiding portions (721a). The charging interface board (11) and the contact member (111) of the flexible printed circuit board (10) are installed and positioned by abutting the pressing portion (721b) of the pressure strip (721) against the end surface of the bracket (711).

7. The oral digital impression device according to claim 3, characterized in that: Also includes a fan support (40), The flange (403) of the fan support member is tightly matched with the inner side surface of the first shell (71) and the inner side surface of the second shell (72). A circuit board through hole (401) is provided on the flange, and the flexible printed circuit board (10) is passed through the circuit board through hole.

8. The oral digital impression device according to claim 7, characterized in that: A circuit board fixing portion (406) is also provided on the flange (403), and the circuit board fixing portion is protrudingly provided on the surface of the flange (403) facing the housing (70) in a manner of surrounding the circuit board through hole (401).

9. The oral digital impression device according to claim 3, characterized in that: The tail cover assembly (20) comprises a tail cover (21), a sealing foam (22) and a power board (23). A plurality of air vents are formed in the outer peripheral area of ​​the tail cover (21) along the circumferential direction. The sealing foam (22) is sandwiched between the tail cover (21) and the power board (23). The power board (23) includes a substrate (231), a power connection port (232), a plurality of elastic connectors (233) and a connector base (234); the power connection port (232) is arranged on a surface of the substrate (231) facing the tail cover (21); the connector base (234) is arranged on a surface of the substrate (231) facing the shell (70); and a plurality of elastic connectors (233) are protruding from the connector base (234).

10. The oral digital impression device according to claim 9, characterized in that: The tail cover assembly (20) further includes a pressing plate (24), A protective portion (242) is provided at a position of the pressing plate body (241) of the pressing plate (24) corresponding to the connector base (234) of the power board (23), and the protective portion is provided in a manner of protruding from the surface of the pressing plate (24) facing the shell (70), and the protruding height is set to be higher than the height of the connector base (234) and lower than the height of the elastic connector (233) by a specified amount.

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