Charging interface connection structure and oral digital impression instrument

Abstract

A charging interface connection structure and an oral digital impression instrument. The charging interface connection structure includes: an elastic connector, a power board provided on a tail cover assembly of the oral digital impression instrument, electrically connected to an external power supply device via a power connection port provided on the power board; and a flexible printed circuit board, a mainboard connector at one end of which is electrically connected to the mainboard via a mainboard interface provided on the mainboard of the oral digital impression instrument, and a contact provided on the charging interface board at the other end of the flexible printed circuit board, which is electrically connected to the elastic connector. The elastic connector is provided on the tail cover assembly, and the flexible printed circuit board is provided 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. This can prevent poor charging or failure to charge due to the cable being pulled off or loosened, or the cable being flattened, etc. when connected between the tail cover and the housing. The assembly operability is optimized and the yield rate 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 rapid development of digitalization in dental laboratories, the use of digital dental impression machines has become increasingly common in dental clinics. Wireless operation of small, handheld devices frees them from the constraints of cables, allowing both doctors and patients to use them without interference from cables. This significantly improves the user experience, and it is foreseeable that wireless digital dental impression machines will gradually replace traditional wired ones in the coming years.

[0003] For wired products, the tail cap only serves to protect against dust and secure the cable. For assembly, simply tighten the two screws. Because wireless products eliminate the need for cable power supply, the charging structure needs to be redesigned.

[0004] For wireless products, since the tail cover also functions as the product's charging port, a cable connection is necessary between the tail cover's charging interface board and the mainboard. As the last component to be assembled, the tail cover's charging interface board cable is invisible and unadjustable during assembly and disassembly. This can lead to four undesirable conditions: 1) The cable is pulled off or loosened, resulting in a charging failure; 2) The cable is flattened, resulting in poor or no charging; 3) During the repair process, the cable is broken during disassembly, increasing repair costs; 4) The cable's condition is uncontrollable and easily leaks out of the vents, 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 assembly operability and improve the yield of the finished product.

[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 the power board of the 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 provided on the power board; and a flexible printed circuit board, wherein the mainboard connector at one end of the flexible printed circuit board is electrically connected to the mainboard via a mainboard interface provided on the mainboard of the oral digital impression instrument, and the 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] The charging interface connection structure of the present invention uses an elastic connector and a flexible printed circuit board 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 device. 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, or the cable from being flattened, which may lead to poor charging or failure to charge. It optimizes the operability of the assembly and improves the yield rate of the finished product.

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

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

[0010] Another embodiment of the present invention relates to an oral digital impression device, 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] With this structure, the dental digital impression device only needs to threadably fasten the tail cap assembly to the housing to achieve electrical connection between the elastic connector and the flexible printed circuit board. Compared to conventional methods that require a cable connection between the tail cap assembly's charging interface board and the mainboard, this design prevents cable detachment, loosening, or flattening, which can lead to poor or even non-charging. This improves the assembly operability of the dental digital impression device and increases the yield rate of finished products.

[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 is provided on the inner side surface of the second shell of the oral digital impression instrument at a position corresponding to the bracket so as to protrude toward the first shell, and the contact parts of the flexible printed circuit board are 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 on the bracket at a position 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 of the flexible printed circuit board can be further installed and positioned, thereby achieving a stable connection between the elastic connector and the flexible printed circuit board.

[0016] Ideally, the pressure strip includes a guide portion and a pressing portion, the guide portion is arranged to protrude 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 member of the flexible printed circuit board are installed and positioned by the pressing portion of the pressure strip abutting against the end surface of the bracket.

[0017] According to the molding with this structure, the guide portion can guide the pressing portion to 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 provided on the flange for the flexible printed circuit board to pass through.

[0019] By setting circuit board through holes 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 cause obstruction to air flow and avoid appearance problems caused by leakage of the soft cable.

[0020] Ideally, 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 flattened by the housing 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 achieved and movement of the power board is restricted by the 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 portion on the pressing plate, the elastic connector can be protected, thereby preventing the elastic connector 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 port connection structure according to the embodiment of the present invention is applied.

[0027] Figure 2 1 is an exploded view showing the structure of an oral digital impression device to which the charging port connection structure according to an embodiment of the present invention is applied.

[0028] Figure 3 It 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 1 and 2 are views showing the assembled state of the tail cap assembly of the oral digital impression device according to an embodiment of the present invention, wherein (a) is a view viewed from the housing side, and (b) is a cross-sectional view taken along line NN of (a).

[0030] Figure 5 3. The figures show the fixing structure of the flexible printed circuit board of the charging port connection structure of the oral digital impression device according to the embodiment of the present invention. (a) is a figure 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 This is a perspective view showing the structure of a flexible printed circuit board of a charging port connection structure of an oral digital impression device according to an embodiment of the present invention.

[0034] Figure 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] Figure 10 1 and 2 are diagrams showing the structure of a power supply 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] Figure 11 1 and 2 are views 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] 10 Flexible 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 plates

[0060] 241 pressure plate body

[0061] 242 Protection Department

[0062] 243 positioning mounting holes

[0063] 30 fans

[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 motherboards

[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 embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0080] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. As used herein, "one" not only means "only one" but also "more than one."

[0081] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0082] First, refer to Figure 1 and Figure 2 The general structure of the rear portion of the dental digital impression device according to an embodiment of the present invention will be described. For ease of explanation, in the drawings, the axial front-to-back direction of the dental digital impression device is designated as the X direction, the radial direction of the dental digital impression device is designated as the Y direction, and the direction perpendicular to both the X and Y directions is designated 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 includes 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 constructed 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 device. 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 inside 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, and includes a tail cover plate 211, a mounting portion 212, a tail cover receiving portion 213, a mounting guide portion 214, a positioning rivet portion 215 and a first through hole 216. The tail cover plate 211 is formed into a roughly elliptical plate, and a plurality of air vents are formed circumferentially in an area near the periphery for inhaling or exhausting gas when the fan 30 is driven. In an area near the periphery of the tail cover plate 211, at least two (two in this example) mounting portions 212 are symmetrically provided circumferentially at positions other than the air vents, 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 in 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 to an external power supply device. In addition, at least two (two are shown in this example) mounting guides 214 are provided in the area near the periphery of the tail cover receiving portion 213. The mounting guides 214 are provided in a symmetrical position along the circumference and protrude toward the housing 70 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. The positioning rivets 215 are provided approximately evenly along the circumference and protrude toward the housing 70 to position and rivet the pressure plate 24.

[0087] The sealing foam 22 is formed into a shape corresponding to the tail cover housing 213. A second through-hole 221 is formed in the center of the sealing foam 22. This second through-hole 221 allows the power connector 232 of the power board 23 to be inserted, thereby connecting to an external power supply device. A first positioning hole 222 is provided outside the second through-hole 221, corresponding to the mounting guide 214. Passing the mounting guide 214 through the first positioning hole 222 allows the sealing foam 22 to be positioned and installed. The provision of the sealing foam 22 ensures waterproofing and limits 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 Figure 10As shown in (a) and (b), the power board 23 includes a substrate 231, a power connection port 232, spring pins 233 serving as elastic connectors, 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 spring pins 233 are provided on the surface of the substrate 231 facing the housing 70. The spring pins 233 are electrically connected to the power connection port 232. The connector base 234 is formed into an elliptical shape to support and protect the spring pins 233. At least two spring pins 233 protrude from the connector base 234, and the spring pins 233 are configured to extend and retract. The provision of the spring pins 233 can absorb manufacturing tolerances and achieve a stable connection with the flexible printed circuit board 10. In addition, a second positioning hole 235 is provided at a position on the substrate 231 corresponding to the mounting guide 214. The installation guide portion 214 is passed through the first positioning hole 222 and the second positioning hole 235 in sequence, thereby achieving the positioning of the sealing foam 22 and the power board 23 relative to the tail cover 21 .

[0089] The pressure plate 24 is formed to be slightly larger than the power board 23 and the sealing foam 22. A protective portion 242 is provided on the pressure plate body 241 at positions corresponding to the connector base 234 and spring pin 233 of the power board 23. This protective portion 242 protrudes from the surface of the pressure plate 24 facing the housing 70. The protruding height is set to be higher than the height of the connector base 234 and lower than the height of the spring pin 233 by a specified amount. The provision of the protective portion 242 protects the spring pin 233 from damage caused by excessive compression, and does not hinder the contact between the spring pin 233 and the flexible printed circuit board 10. Furthermore, a positioning mounting hole 243 is provided on the pressure plate body 241 at a position corresponding to the positioning rivet 215. This positioning mounting hole 243 allows the positioning rivet 215 of the tail cover 21 to pass through. By passing the positioning rivet portion 215 through the positioning installation hole 243 and riveting and fixing it, 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 formed integrally from an elastic material such as a silicone material. Figure 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 surface 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 face of the support frame 60 and the end face 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. Fasteners (not shown) pass through the corresponding through holes on the fan 30 and the corresponding fan support mounting holes 407 on the base plate 404 in sequence and are fixed to the corresponding fastening holes on the end face of the support frame 60. Therefore, the fan 30, fan support 40, and support frame 60 are integrated into a single structure through the fasteners and corresponding fan support mounting / fastening holes, rather than being separate, loose components. Therefore, this structural design effectively reduces vibration and noise in the fan 30, lowering the probability of equipment failure. Furthermore, because the flange 403 divides the interior space of the housing 70 into a first interior space and a second interior space, increasing the pressure differential between the front and rear of the fan 30, the air flow generated by the fan 30 does not form eddies or turbulence within the interior space of the housing 70. Instead, it is precisely directed to the central opening of the base plate and, further, to the heat source device area, effectively dissipating heat from this area and reducing the probability of equipment failure. Furthermore, the flange 403 includes a rib 403a located radially outward. The design of this rib 403a allows the flange 403 of the fan support 40 to further tightly fit the inner surface of the housing 70, significantly reducing installation resistance. Preferably, the cross-section of the rib 403a is roughly triangular, further facilitating a tight fit with the inner surface of the housing 70. Furthermore, a circuit board through-hole 401 is provided on one side edge of the flange 403 for passing the flexible printed circuit board 10 through. Furthermore, a circuit board securing portion 406 is provided on the surface of the flange 403 facing the housing 70, surrounding the circuit board through-hole 401. This circuit board securing portion 406 protrudes from the surface of the flange 403 facing the housing 70 and serves to secure the reinforcing plate 13 (described later) of the flexible printed circuit board 10 and limit radial extension of the flexible printed circuit board 10. The provision of the circuit board through-hole 401 and the circuit board securing portion 406 on the flange 403 assists in positioning the flexible flat cable of the flexible printed circuit board 10, preventing it from being compressed by the housing during assembly and preventing it from appearing within the view of the tail cover's air duct, thereby preventing airflow obstruction.

[0091] like Figure 8As shown, the flexible printed circuit board 10 is installed on the outside of the support frame 60, and includes 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 111 of the charging interface board 11 is used to electrically connect to 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 heat for 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 (e.g. Figure 5 ), the first shell 71 and the second shell 72 are arranged in a manner opposite to each other, and the flange 403 of the fan support 40 is tightly matched with the inner side surfaces of the first shell 71 and the inner side surfaces of the second shell 72.

[0093] A bracket 711 is provided on the inner side of the first housing 71, near the tail cap assembly 20. The bracket 711 protrudes from the inner side of the first housing 71 toward the second housing 72. Notches 711b are provided on the bracket 711 at locations corresponding to the spring-loaded pins 233 and connector base 234 of the power board 23. These notches 711b expose the contacts 111 of the charging interface board 11 of the flexible printed circuit board 10, allowing them to electrically connect with the spring-loaded pins 233 of the power board 23. Furthermore, a receiving groove 711a is formed in the bracket 711 to accommodate the charging interface board 11 of the flexible printed circuit board 10. Fixing portions 711c are provided on both sides of the bracket 711 at locations corresponding to the mounting portions 212 of the tail cap 21. As the last step in 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 holding strip 721 is provided at a position corresponding to the bracket 711. The holding strip 721 includes a guide portion 721a and a pressing portion 721b. The two guide portions 721a protrude from the inner side of the second housing 72 toward the first housing 71, and the pressing portion 721b is interposed between the two guide portions 721a. After the charging interface board 11 of the flexible printed circuit board 10 is received in the receiving groove 711a of the bracket 711 of the first housing 71, and the contacts 111 of the charging interface board 11 are exposed through the notches 711b, the second housing 72 is installed toward the first housing 71 until the pressing portion 721b of the holding strip 721 abuts the end surface of the bracket 711. At this point, the charging interface board 11 of the flexible printed circuit board 10 is restrained in the receiving groove 711a, preventing it from shifting and ensuring a stable electrical connection between the contacts 111 and the spring pins 233 of the power board 23.

[0095] The charging interface connection structure of the oral digital impression instrument 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 cap assembly, which optimizes the assembly process and improves production efficiency and yield;

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

[0098] 3) Since the flexible printed circuit board is 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 flexible cable of the flexible printed circuit board is assisted in positioning by the circuit board through-holes and circuit board fixing parts set on the fan support, the flexible cable can be prevented from being flattened by the shell during the assembly process. At the same time, the flexible cable is controlled to not appear in the field of view of the tail cover air duct, so as not to hinder air flow and avoid the appearance problem caused by leakage of the flexible 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 fixation is required during the installation process, and the assembly process is simple.

[0100] It should be noted that the term "cylindrical" as used herein is not limited to cylindrical shapes; its cross-sectional shape may also be square, rectangular, polygonal, etc. The term "tight fit" as used herein refers to the absence of gaps between two components when they mate, also known as an "interference fit" or "interference fit." The term "fit" as used herein refers to the presence of full contact between the surfaces of two components, with no gaps present.

[0101] While the embodiments of the present invention have been described above, it should be understood that the present disclosure is not limited to the aforementioned embodiments and structures. The present disclosure also encompasses various modifications and variations within the scope of equivalents. Furthermore, various combinations and methods, including combinations and methods that include only one element, or combinations and methods that include more than or less than one element, also fall within the scope and spirit of the present disclosure.

Claims

1. An oral digital impression device, characterized in that: include: Charging interface connection structure; A housing (70), wherein the housing is a hollow structure formed by combining a first housing (71) and a second housing (72); as well as A tail cover assembly (20) is coupled to the housing (70) by threaded fastening. The charging interface connection structure includes: An elastic connector (233), which is provided 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) provided 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 (111) for electrically connecting to the elastic connector (233). On the inner side surface of the first shell (71) of the oral digital impression instrument, a bracket (711) is provided 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 on the inner side surface of the second shell (72) of the oral digital impression instrument at a position corresponding to the bracket (711). 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).

2. The oral digital impression device according to claim 1, wherein: A notch (711b) is provided on the bracket (711) at a position corresponding to the elastic connector (233), and the notch (711b) allows the contact member (111) of the charging interface board (11) of the flexible printed circuit board (10) to be exposed. 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).

3. The oral digital impression device according to claim 1 or 2, wherein: The pressure strip (721) includes a guide portion (721a) and a pressing portion (721b), wherein the guide 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 guide portions (721a). The charging interface board (11) and the contact member (111) of the flexible printed circuit board (10) are installed and positioned by the pressing portion (721b) of the pressure strip (721) abutting against the end surface of the bracket (711).

4. The oral digital impression device according to claim 1, wherein: Also included is a fan support (40), The flange (403) of the fan support member is tightly fitted 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.

5. The oral digital impression device according to claim 4, wherein: 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).

6. The oral digital impression device according to claim 1, wherein: The tail cover assembly (20) includes a tail cover (21), a sealing foam (22) and a power board (23). A plurality of air vents are formed in the 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 housing (70), and the plurality of elastic connectors (233) are protruding from the connector base (234).

7. The oral digital impression device according to claim 6, wherein: The tail cover assembly (20) further includes a pressing plate (24), A protective portion (242) is provided on 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 by a specified amount than the height of the elastic connector (233).

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