Oral digital impression machine

Abstract

The present invention relates to an oral digital impression device. The oral digital impression device comprises a battery support, a fan support, a fan, and a shell; wherein the battery support is used to support a battery, the fan support is used to support and enclose a fan, and separate the fan from the battery support, and the battery support, the fan support, and the fan are all installed in the shell; wherein the fan support comprises a cylindrical body, a flange, and a base plate, the cylindrical body is used to enclose the fan therein, the flange is located at one end of the cylindrical body and extends radially outward from the cylindrical body, and is used to fit tightly with the inner side surface of the shell to separate the internal space of the shell into a first internal space and a second internal space, the base plate is located at the other end of the cylindrical body opposite to the flange, and is provided with a central opening of the base plate for air circulation, and the two end faces of the base plate are respectively in contact with the end face of the battery support and the end face of the fan.

Description

Technical Field

[0001] The invention relates to an oral digital impression instrument. Background Art

[0002] In recent years, with the long-term development of digital medical devices in dental clinics, the application of oral digital impression devices in dental clinics has become more and more common. For oral digital impression devices that are becoming increasingly miniaturized, even if the heat generated inside remains unchanged, the difficulty and requirements of heat dissipation will increase accordingly. In order to ensure the stable operation of the equipment, effective heat dissipation measures must be taken.

[0003] The oral digital impression device in the prior art usually uses a fan for heat dissipation. However, in the prior art, for the oral digital impression device containing a battery, the battery and the fan are usually simply arranged in series due to the space arrangement in the shell. Therefore, the oral digital impression device in the prior art mainly has the following problems: the fan has a lot of vibration, which is often transmitted to the mainboard, increasing the probability of failure, and causing resonance of the whole machine, increasing noise; the air flow is not accurately directed to the heat source device area, resulting in excessive local temperature rise, increasing the probability of failure; too many wind direction guide auxiliary materials are fixedly installed, increasing the probability of failure. Summary of the invention

[0004] One object of the present invention is to provide an oral digital impression instrument that can overcome at least some of the defects of the prior art, effectively reduce the vibration of the fan, reduce noise, accurately guide the air flow to the heat source device area, effectively dissipate the heat in the heat source device area, and reduce the probability of equipment failure.

[0005] The above objects of the present invention are achieved by an oral digital impression instrument, which comprises a battery support, a fan support, a fan, and a housing;

[0006] The battery support is used to support the battery, the fan support is used to support and enclose the fan and separate the fan from the battery support, and the battery support, the fan support and the fan are all installed in the housing;

[0007] Among them, the fan support includes a cylindrical body, a flange and a base plate, the cylindrical body is used to enclose the fan therein, the flange is located at one end of the cylindrical body and extends radially outward from the cylindrical body, and is used to fit tightly with the inner side surface of the shell to separate the internal space of the shell into a first internal space and a second internal space, the base plate is located at the other end of the cylindrical body opposite to the flange, and is provided with a central opening of the base plate for air circulation, and the two end surfaces of the base plate are respectively in contact with the end surface of the battery support and the end surface of the fan.

[0008] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: effectively reduce the vibration of the fan, reduce noise, accurately guide the air flow to the heat source device area, effectively dissipate the heat in the heat source device area, and reduce the probability of equipment failure.

[0009] Preferably, the oral digital impression instrument further comprises a circuit board, which is mounted on the outside of the battery support and is also mounted inside the housing, and the air flow generated by the fan is directed to the circuit board.

[0010] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: the air flow generated by the fan is accurately directed to the circuit board as the main heat source device, effectively dissipating the heat of the circuit board and reducing the probability of equipment failure.

[0011] Preferably, the shell includes a first shell and a second shell, the first shell and the second shell are arranged opposite to each other, and the flange is tightly matched with the inner side surface of the first shell and the inner side surface of the second shell.

[0012] According to the above technical solution, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: facilitating the assembly of the housing and various components in the housing, thereby improving assembly efficiency.

[0013] Preferably, the oral digital impression device also includes at least two fasteners, at least two fastening holes are provided on the end face of the battery support, at least two through holes are provided on the base plate, and at least two through holes are provided on the fan, and each fastener passes through the corresponding through hole on the fan and the corresponding through hole on the base plate in sequence and is fixed to the corresponding fastening hole on the end face of the battery support.

[0014] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: through the design of fasteners and corresponding through holes / fastening holes, the end faces of the fan, fan support and battery support can be fastened together, further effectively reducing the vibration of the fan, reducing noise, and reducing the probability of equipment failure.

[0015] Preferably, the oral digital impression instrument also includes a fan stopper, which is installed on the other end face of the fan opposite to the substrate, and the fan stopper is also provided with at least two through holes, and each fastener passes through the corresponding through hole on the fan stopper, the corresponding through hole on the fan, and the corresponding through hole on the substrate in sequence and is fixed to the corresponding fastening hole on the end face of the battery support.

[0016] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: through the fan blocking member, the end faces of the fan, the fan support and the battery support can be better fastened together, and the probability of the fan blades being out of the normal position due to falling is greatly reduced.

[0017] Preferably, the flange includes a rib located on the radial outer side thereof.

[0018] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: through the rib design, the flange outer ring of the fan support can be further tightly matched with the inner side of the shell, and the installation resistance can be greatly reduced.

[0019] Preferably, at least two protrusions are arranged on the end surface of the battery support, the at least two fastening holes are located in the corresponding protrusions, and at least two recesses are arranged on the base plate for accommodating the corresponding protrusions.

[0020] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: through the design of the protrusion / recess, the installation accuracy of the fan support can be ensured, and the vibration of the fan can be further effectively reduced, the noise can be reduced, and the probability of equipment failure can be reduced.

[0021] Preferably, the shape and size of the end surface of the battery support are substantially the same as the shape and size of the end surface of the substrate in contact therewith, and the end surface of the battery support is also provided with a central opening for air circulation.

[0022] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: it can make the end face of the battery support fully fit and contact with the end face of the substrate, ensure a larger contact area, further effectively reduce the vibration of the fan, reduce noise, and reduce the probability of equipment failure.

[0023] Preferably, the longitudinal centerline of the battery and the longitudinal centerline of the fan are parallel and offset.

[0024] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: after the air flow generated by the fan passes through the central opening of the base plate and the central opening of the end face of the battery support, a part of the air flow is blocked by the end face of the battery, and passes through the air duct space formed by the battery offset, thereby being accurately guided to the upper and lower surfaces of the circuit board, further effectively dissipating the heat of the circuit board and reducing the probability of equipment failure; and, due to the offset arrangement of the battery, installation space for the circuit board is reserved, further reducing the overall size of the device.

[0025] Preferably, the flange includes a wire through hole for passing a wire connected to the circuit board.

[0026] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: through the appropriate design of the wire through-hole position, it can ensure the power supply to the circuit board and ensure the flange's function of separating the internal space of the shell as much as possible.

[0027] Preferably, the fan support is integrally formed from an elastomeric material.

[0028] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: since the fan support is formed integrally from an elastomeric material, the vibration of the fan is further effectively reduced, the noise is reduced, and the probability of equipment failure is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. 4 is an exploded view of an oral digital impression device according to an embodiment of the present invention.

[0030] Figure 2 It is a half-section exploded view of an oral digital impression device according to an embodiment of the present invention.

[0031] Figure 3 It is a cross-sectional view of an oral digital impression device according to an embodiment of the present invention.

[0032] Figure 4A The present invention is a three-dimensional diagram of a fan support member in a digital oral impression device according to an embodiment of the present invention.

[0033] Figure 4B It is another stereoscopic view of the fan support in the oral digital impression device according to an embodiment of the present invention.

[0034] Reference numerals list

[0035] 101: Battery;

[0036] 102: battery support;

[0037] 103: fan support;

[0038] 104: fan;

[0039] 105: fan blocking member;

[0040] 106: Fasteners;

[0041] 107: Circuit board;

[0042] 108: first housing;

[0043] 109: second housing;

[0044] 121: end surface of the battery support;

[0045] 121a: protrusion;

[0046] 131: Tubular body;

[0047] 132: flange;

[0048] 132a: convex rib;

[0049] 132b: Wire through hole;

[0050] 133: Substrate;

[0051] 133a: recessed portion;

[0052] F: Air flow direction. DETAILED DESCRIPTION

[0053] The specific embodiments of the present invention will be described below. It should be noted that in the specific description of these embodiments, in order to be concise and clear, this specification cannot provide a detailed description of all the features of the actual embodiments. It should be understood that in the actual implementation of any embodiment, just as in the process of any engineering project or design project, in order to achieve the specific goals of the developer and to meet system-related or business-related restrictions, various specific decisions are often made, and this will also change from one embodiment to another. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the content disclosed by the present invention, some changes in design, manufacturing or production based on the technical content disclosed in this disclosure are just conventional technical means, and should not be understood as insufficient content of this disclosure.

[0054] Unless otherwise defined, the technical or scientific terms used in the claims and the specification shall have the usual meaning understood by persons with ordinary skills in the technical field to which the invention belongs. The words "first", "second" and similar words used in the patent application specification and the claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limitation, but indicate the existence of at least one. "Include" or "comprises" and other similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalent elements, and do not exclude other elements or objects. "Connected" or "connected" and other similar words are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.

[0055] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0056] Figure 1 FIG. 4 is an exploded view of an oral digital impression device according to an embodiment of the present invention. Figure 2 It is a half-section exploded view of an oral digital impression device according to an embodiment of the present invention. Figure 3 It is a cross-sectional view of an oral digital impression device according to an embodiment of the present invention. Figure 4A The present invention is a three-dimensional diagram of a fan support member in a digital oral impression device according to an embodiment of the present invention. Figure 4B It is another stereoscopic view of the fan support in the oral digital impression device according to an embodiment of the present invention.

[0057] like Figure 1 - Figure 4B As shown, an oral digital impression device according to an embodiment of the present invention includes a battery support 102, a fan support 103, a fan 104, and a housing.

[0058] The battery support 102 is used to support the battery 101. Preferably, Figure 1 As shown, the battery support 102 forms a receiving cavity for supporting and at least partially receiving the battery 101 in the receiving cavity. The battery 101 can have various shapes, such as Figure 1 The cylindrical shape shown may also be in other shapes such as plate, cuboid, etc. For example, when the battery 101 is in a cylindrical shape, the receiving cavity of the battery support 102 may be in a semi-cylindrical shape. Preferably, the battery 101 may be a lithium battery.

[0059] The fan support 103 is used to support and enclose the fan 104 and to separate the fan 104 from the battery support 102. The battery support 102, the fan support 103 and the fan 104 are all installed in the housing.

[0060] like Figure 1 - Figure 4B As shown, the fan support 103 includes a cylindrical body 131, a flange 132 and a base plate 133. The cylindrical body 131 is used to enclose the fan 104 therein. The flange 132 is located at one end of the cylindrical body 131 and extends radially outward from the cylindrical body 131, and is used to closely match with the inner side of the housing to separate the internal space of the housing into a first internal space and a second internal space (for example, Figure 3The substrate 133 is located at the other end of the cylindrical body 131 opposite to the flange 132, and has a central opening of the substrate for air circulation. The two end surfaces of the substrate 133 are respectively connected to the end surface 121 of the battery support 102 and the end surface of the fan 104 ( Figure 3 The left end face shown in FIG. 1 is fitted.

[0061] It should be noted that the term "cylindrical body" described in this article means that the body is a hollow component, and the cylindrical shape is not limited to a cylindrical shape, and its cross-sectional shape can also be square, rectangular, polygonal, etc.

[0062] The term "tight fit" described herein means that when two components (eg, a flange and a housing) are fitted together, there is no gap between the two components, which may also be referred to as an "interference fit" or an "interference fit".

[0063] The term "attachment" as used herein means that the surfaces of two components (eg, the end surface of the substrate and the end surface of the battery support) are in full contact with each other without any gap.

[0064] The term "end surface" described herein refers to: a surface of a component at one end in the longitudinal direction of the entire oral digital impression instrument.

[0065] According to the above technical scheme, the oral digital impression instrument of the present invention can achieve the following beneficial technical effects: effectively reduce the vibration of the fan 104, reduce noise, accurately guide the air flow to the heat source device area, effectively dissipate the heat in the heat source device area, and reduce the probability of equipment failure.

[0066] Specifically, the present invention uses a fan support 103 to support and enclose the fan 104, and the cylindrical body 131 encloses the fan 104 therein, that is, the outer peripheral side of the fan 104 is enclosed and supported, and the flange 132 is tightly matched with the inner side of the shell, thereby indirectly further supporting the fan 104, and the substrate 133 effectively supports one end face of the fan 104. Moreover, since the two end faces of the substrate 133 are respectively in contact with the end face 121 of the battery support 102 and the end face of the fan 104, the fan 104, the fan support 103 and the battery support 102 form an integrated structure, rather than loose separate parts. Therefore, the above structural design effectively reduces the vibration of the fan 104, reduces noise, and reduces the probability of equipment failure.

[0067] In addition, since the flange 132 divides the internal space of the shell into a first internal space and a second internal space, the front and rear pressure difference of the fan is increased, the air flow generated by the fan 104 will not form eddies or turbulence in the internal space of the shell, but will be precisely guided to the center opening of the substrate, and further precisely guided to the heat source device area, thereby effectively dissipating the heat in the heat source device area and reducing the probability of equipment failure.

[0068] Preferably, if Figure 1 - Figure 3 As shown, the outer peripheral side of the fan 104 is closely matched with the inner peripheral side of the cylindrical body 131. For example, when the fan 104 presents a substantially square cross section, the inner cavity of the cylindrical body 131 also presents a substantially square cross section. Therefore, the sealing performance of the fan support 103 to the fan 104 can be further improved, which is conducive to improving the front and rear pressure difference of the fan and accurately guiding the air flow to the heat source device area.

[0069] In some embodiments, Figure 1 - Figure 3 As shown, the oral digital impression device further includes a circuit board 107, which is mounted outside the battery support 102 and is also mounted inside the housing. The air flow generated by the fan 104 is directed to the circuit board 107. Therefore, the air flow generated by the fan 104 is precisely directed to the circuit board 107, which is the main heat source device, to effectively dissipate heat from the circuit board 107, thereby reducing the probability of device failure. Figure 1 - Figure 3 In the state shown, the circuit board 107 is installed below the battery support 102 , that is, on the side facing away from the receiving cavity of the battery support 102 .

[0070] In some embodiments, Figure 3 As shown, the housing includes a first housing 108 (eg Figure 3 ) and a second housing 109 (eg Figure 3 The upper shell shown in the figure), the first shell 108 and the second shell 109 are arranged in a manner opposite to each other, and the flange 132 is tightly matched with the inner side surface of the first shell 108 and the inner side surface of the second shell 109. Therefore, it is convenient to assemble the shell and the various components in the shell, and the assembly efficiency is improved. Of course, those skilled in the art can understand based on the disclosure of this application that the first shell and the second shell can also take the form of a left shell and a right shell without departing from the protection scope of the claims of this application.

[0071] In some embodiments, Figure 1 - Figure 3As shown, the oral digital impression device also includes at least two fasteners 106 (such as screws), at least two fastening holes (such as threaded holes) are provided on the end face 121 of the battery support 102, at least two through holes are provided on the base plate 133, and at least two through holes are provided on the fan 104. Each fastener 106 passes through the corresponding through hole on the fan 104 and the corresponding through hole on the base plate 133 in sequence and is fixed to the corresponding fastening hole on the end face 121 of the battery support 102. Therefore, through the design of the fastener 106 and the corresponding through hole / fastening hole, the fan 104, the fan support 103 and the end face 121 of the battery support 102 can be fastened together, further effectively reducing the vibration of the fan 104, reducing noise, and reducing the probability of equipment failure.

[0072] In some embodiments, Figure 1 - Figure 3 As shown, the oral digital impression instrument also includes a fan stopper 105, which is installed on the other end face of the fan 104 opposite to the substrate 133. The fan stopper 105 is also provided with at least two through holes, and each fastener 106 passes through the corresponding through holes on the fan stopper 105, the corresponding through holes on the fan 104, and the corresponding through holes on the substrate 133 in sequence and is fixed to the corresponding fastening holes on the end face 121 of the battery support 102. Therefore, through the fan stopper 105, the fan 104, the fan support 103 and the end face 121 of the battery support 102 can be better fastened together, and the probability of the fan blades being out of the normal position due to falling is greatly reduced. Preferably, the fan stopper 105 is in the shape of a long sheet. Preferably, the two through holes are respectively opened near the two ends of the long sheet-shaped fan stopper 105. The long sheet-shaped fan blocking member 105 can effectively block the fan 104 without causing too much influence on the air intake (air flow) of the fan 104 .

[0073] In some embodiments, Figure 3 - Figure 4B As shown, the flange 132 includes a rib 132a located radially outward. Therefore, through the rib design, the outer ring of the flange 132 of the fan support 103 can be further closely matched with the inner side of the housing, and the installation resistance is greatly reduced. Preferably, the cross section of the rib 132a is substantially triangular, which is further conducive to close matching with the inner side of the housing.

[0074] In some embodiments, Figure 1 - Figure 4BAs shown, at least two protrusions 121a are provided on the end surface 121 of the battery support 102, at least two fastening holes are located in the corresponding protrusions 121a, and at least two recesses 133a are provided on the base plate 133 for accommodating the corresponding protrusions 121a. Therefore, through the design of the protrusions 121a / recesses 133a, the installation accuracy of the fan support 103 can be ensured, and the vibration of the fan 104 can be further effectively reduced, the noise can be reduced, and the probability of equipment failure can be reduced.

[0075] In some embodiments, Figure 1 - Figure 4B As shown, the shape and size of the end face 121 of the battery support 102 are substantially the same as the shape and size of the end face of the substrate 133 that is in contact with it, and the end face 121 of the battery support 102 is also provided with a central opening for air circulation. Therefore, the end face 121 of the battery support 102 can be fully in contact with the end face of the substrate 133, ensuring a larger contact area, further effectively reducing the vibration of the fan 104, reducing noise, and reducing the probability of equipment failure. For example, Figure 1 - Figure 4B As shown, the end face 121 of the battery support 102 is substantially in the shape of a square outside and a circle inside, and the end face of the substrate 133 that is in contact with it is also substantially in the shape of a square outside and a circle inside, and the sizes of the two are substantially the same.

[0076] The term "substantially the same size" as used herein means that the size of the latter is 90-110% of the size of the former. For example, the size of the end face of the substrate 133 that is in contact with the battery support 102 (e.g., the side length of the square end face) is 90-110% of the size of the end face 121 of the battery support 102 (e.g., the side length of the square end face).

[0077] Preferably, if Figure 1 - Figure 3 As shown, the shapes and sizes of the internal air flow channel of the fan 104, the central opening of the substrate 133, and the central opening of the end surface of the battery support 102 are substantially the same. Therefore, when the air flows from the internal air flow channel of the fan 104 along the air flow direction F through the central opening of the substrate 133 and the central opening of the end surface of the battery support 102, the inner surface of the entire air duct (air flow channel) is substantially flat, so that it guides the air flow to the heat source device area of ​​the circuit board while reducing the probability of eddy currents generated due to surface unevenness.

[0078] Preferably, the size (e.g., diameter) of the substrate center opening of the substrate 133 is 90-110% of the size (e.g., diameter) of the internal air flow passage of the fan 104. More preferably, the size of the substrate center opening of the substrate 133 is 95-105% of the size of the internal air flow passage of the fan 104. More preferably, the size of the substrate center opening of the substrate 133 is 98-102% of the size of the internal air flow passage of the fan 104. More preferably, the size of the substrate center opening of the substrate 133 is 99-101% of the size of the internal air flow passage of the fan 104.

[0079] Preferably, the size (e.g., diameter) of the end face center opening of the battery support 102 is 90-110% of the size (e.g., diameter) of the substrate center opening of the substrate 133. More preferably, the size of the end face center opening of the battery support 102 is 95-105% of the size of the substrate center opening of the substrate 133. More preferably, the size of the end face center opening of the battery support 102 is 98-102% of the size of the substrate center opening of the substrate 133. More preferably, the size of the end face center opening of the battery support 102 is 99-101% of the size of the substrate center opening of the substrate 133.

[0080] Preferably, if Figure 3 As shown, the air duct distance between the battery support 102 and the base plate 133 is appropriate (preferably 3-5 mm) and the air duct surface is smooth, which further reduces the air flow vortex and whistling noise.

[0081] In some embodiments, Figure 3 As shown, the longitudinal center line of the battery 101 and the longitudinal center line of the fan 104 are parallel and offset. Therefore, after the air flow generated by the fan 104 passes through the central opening of the base plate and the central opening of the end surface of the battery support 102, a part of it is blocked by the end surface of the battery 101, and passes through the air duct space formed by the offset of the battery 101, and is accurately guided to the upper and lower surfaces of the circuit board 107, further effectively dissipating the heat of the circuit board 107 and reducing the probability of equipment failure; and, due to the offset arrangement of the battery 101, the installation space of the circuit board 107 is reserved, further reducing the overall size of the device.

[0082] In some embodiments, Figure 4A As shown, the flange 132 includes a wire through hole 132b for passing the wire connected to the circuit board 107. Therefore, by designing the appropriate position of the wire through hole, it is possible to ensure that the circuit board 107 is powered and the flange 132 can separate the internal space of the housing as much as possible.

[0083] In some embodiments, Figure 1 - Figure 4BAs shown, the fan support 103 is formed of an elastomeric material in one piece. That is, the cylindrical body 131, the flange 132 and the base plate 133 are formed of an elastomeric material in one piece to form the fan support 103. Therefore, since the fan support 103 is formed of an elastomeric material in one piece, the vibration of the fan 104 is further effectively reduced, the noise is reduced, and the probability of equipment failure is reduced. Preferably, the fan support 103 is formed of a silicone rubber material in one piece.

[0084] The above describes the specific embodiments of the present invention, but those skilled in the art will understand that the above specific embodiments do not constitute a limitation of the present invention. Those skilled in the art can make various modifications based on the above disclosure without exceeding the scope of the present invention.

Claims

1. An oral digital impression device, comprising a battery support (102), a fan support (103), a fan (104), and a housing; in, The battery support (102) is used to support the battery (101), and the fan support (103) is used to support and enclose the fan (104) and separate the fan (104) from the battery support (102). The battery support (102), the fan support (103) and the fan (104) are all installed in the housing; The fan support (103) comprises a cylindrical body (131), a flange (132) and a base plate (133); the cylindrical body (131) is used to enclose the fan (104) therein; the flange (132) is located at one end of the cylindrical body (131) and extends radially outward from the cylindrical body (131) and is used to fit tightly with the inner side surface of the shell to separate the internal space of the shell into a first internal space and a second internal space; the base plate (133) is located at the other end of the cylindrical body (131) opposite to the flange (132) and is provided with a central opening of the base plate for air circulation; the two end surfaces of the base plate (133) are respectively in contact with the end surface (121) of the battery support (102) and the end surface of the fan (104).

2. The oral digital impression device according to claim 1, characterized in that: The oral digital impression device further comprises a circuit board (107), wherein the circuit board (107) is mounted outside the battery support (102), and the circuit board (107) is also mounted inside the housing, and the air flow generated by the fan (104) is directed to the circuit board (107).

3. The oral digital impression device according to claim 1, characterized in that: The shell includes a first shell (108) and a second shell (109), the first shell (108) and the second shell (109) are arranged in a manner opposite to each other, and the flange (132) is tightly matched with the inner side surface of the first shell (108) and the inner side surface of the second shell (109).

4. The oral digital impression device according to claim 1, characterized in that: The oral digital impression device further comprises at least two fasteners (106), at least two fastening holes are provided on the end surface (121) of the battery support (102), at least two through holes are provided on the base plate (133), and at least two through holes are provided on the fan (104), and each fastener (106) passes through the corresponding through hole on the fan (104) and the corresponding through hole on the base plate (133) in sequence and is fixed to the corresponding fastening hole on the end surface (121) of the battery support (102).

5. The oral digital impression device according to claim 4, characterized in that: The oral digital impression device also includes a fan blocking member (105), which is installed on the other end face of the fan (104) opposite to the base plate (133). The fan blocking member (105) is also provided with at least two through holes, and each fastener (106) passes through the corresponding through hole on the fan blocking member (105), the corresponding through hole on the fan (104), and the corresponding through hole on the base plate (133) in sequence to be fixed to the corresponding fastening hole on the end face (121) of the battery support (102).

6. The oral digital impression device according to claim 1, characterized in that: The flange (132) includes a rib (132a) located on the radial outer side thereof.

7. The oral digital impression device according to claim 4, characterized in that: At least two protrusions (121a) are arranged on the end surface (121) of the battery support (102), the at least two fastening holes are located in the corresponding protrusions (121a), and at least two recesses (133a) are arranged on the base plate (133) for accommodating the corresponding protrusions (121a).

8. The oral digital impression device according to claim 1, characterized in that: The shape and size of the end surface (121) of the battery support (102) are substantially the same as the shape and size of the end surface of the substrate (133) in contact therewith, and the end surface (121) of the battery support (102) is also provided with a central opening for air circulation.

9. The oral digital impression device according to claim 1, characterized in that: The longitudinal centerline of the battery (101) and the longitudinal centerline of the fan (104) are parallel and offset.

10. The oral digital impression device according to claim 2, characterized in that: The flange (132) includes a wire through hole (132b) for passing a wire connected to the circuit board (107).

11. The oral digital impression device according to claim 1, characterized in that: The fan support (103) is integrally formed of an elastomeric material.

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