Dental scanning equipment with variable focal length

Abstract

The utility model discloses dental scanning equipment with a variable focal length, and relates to the technical field of radiodiagnosis equipment. The dental scanning equipment with the variable focal length comprises a telescopic assembly, the telescopic assembly comprises a first sliding sleeve plate and a fixed sleeve plate; the first sliding sleeve plate is arranged in the fixed sleeve plate in a sliding and sleeved mode in the first direction. The first direction is parallel to the length direction of the telescopic assembly; a driving assembly is arranged in the telescopic assembly and at least used for driving the first sliding sleeve plate to slide in the first direction. The telescopic assembly and the driving assembly are arranged between the bulb tube and the detector, so that the distance between the bulb tube and the detector is adjustable, the distance between the small bulb tube and the detector can be adjusted during oral cavity scanning, and the distance between the large bulb tube and the detector can be adjusted during head scanning.

Description

Technical Field

[0001] The present application relates to the technical field of radiological diagnostic equipment, and in particular to a dental scanning device with variable focal length. Background Art

[0002] Dental scanning equipment is a digital tool used in stomatology, which is mainly used to obtain three-dimensional images of teeth and oral structures. Since dental scanning equipment improves the efficiency and accuracy of oral diagnosis and treatment through digital technology, it is widely used in the fields of restoration, orthodontics and maxillofacial surgery planning. Some existing dental scanning equipment can only perform oral scanning or head scanning because the focal length is not variable. In order to enable the dental scanning equipment to perform both oral scanning and head scanning, it is generally necessary to set up two sets of tubes and detectors, one set of tubes and detectors is used for oral scanning, and the other set of tubes and detectors is used for head scanning. For example, patent application documents with patent publication numbers CN112704512A and CN112704512A disclose similar dental scanning equipment. The two sets of tubes and detectors make the dental scanning equipment more expensive to manufacture, and the maintenance and use costs are also higher. Utility Model Content

[0003] The purpose of the present application is to provide a dental scanning device with a variable focal length, so as to solve the technical problem that the dental scanning device capable of performing both oral scanning and head scanning in the prior art has a high manufacturing cost.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A dental scanning device with variable focal length, comprising:

[0006] A lifting column; the lifting column can be extended and retracted in the vertical direction;

[0007] A cantilever, arranged on the top of the lifting column;

[0008] A telescopic assembly; the telescopic assembly is rotatably connected to the cantilever through a rotating shaft, and the axis of the rotating shaft is parallel to the vertical direction; the telescopic assembly comprises a first sliding sleeve and a fixed sleeve; the first sliding sleeve is slidably sleeved inside the fixed sleeve along a first direction; the first direction is parallel to the length direction of the telescopic assembly; the cross-sections of the first sliding sleeve and the fixed sleeve are both C-shaped; the C-shaped opening of the first sliding sleeve faces upward, and the C-shaped opening of the fixed sleeve faces downward; a driving assembly is arranged inside the telescopic assembly, and the driving assembly is at least used to drive the first sliding sleeve to slide along the first direction;

[0009] A ball tube and a detector; the ball tube is arranged at the first end of the telescopic component in the length direction, and the detector is arranged at the second end of the telescopic component in the length direction.

[0010] As a specific solution in the technical solution of the present application, the driving assembly includes an automatic push rod; one end of the automatic push rod is connected to the first sliding sleeve, and the other end of the automatic push rod is connected to the fixed sleeve.

[0011] As a specific solution in the technical solution of this application, the driving component includes:

[0012] A first threaded sleeve, disposed on the first sliding sleeve plate;

[0013] A first lead screw; one end of the first lead screw is rotatably connected to the fixed sleeve, and the first lead screw is threadedly connected to the first threaded sleeve;

[0014] A first motor is arranged on the fixed sleeve;

[0015] A first driving gear, arranged at an output end of the first motor;

[0016] The first driven gear is arranged on the first lead screw; and the first driven gear is meshed with the first driving gear.

[0017] As a specific solution in the technical solution of the present application, the telescopic assembly also includes a second sliding sleeve, which is slidably mounted on the outside of the fixed sleeve along the first direction; the telescopic assembly is also used to drive the second sliding sleeve and the fixed sleeve to form a sliding connection along the first direction.

[0018] As a specific solution in the technical solution of this application, the driving component also includes:

[0019] A second threaded sleeve, disposed on the fixed sleeve plate;

[0020] A second lead screw; one end of the second lead screw is rotatably connected to the second sliding sleeve, and the second lead screw is threadedly connected to the second threaded sleeve;

[0021] A second motor is arranged on the second sliding sleeve;

[0022] A second driving gear, disposed at an output end of the second motor;

[0023] The second driven gear is arranged on the second lead screw; and the second driven gear is meshed with the second driving gear.

[0024] As a specific solution in the technical solution of the present application, when the length of the telescopic assembly is the shortest, the first motor and the second motor are both close to one end of the fixed sleeve and away from the other end of the fixed sleeve.

[0025] As a specific solution in the technical solution of the present application, when the length of the telescopic assembly is the shortest, the first motor and the second motor are symmetrically arranged; the first lead screw and the second lead screw are symmetrically arranged; the distance between the first lead screw and the second lead screw is greater than the distance between the first motor and the second motor.

[0026] As a specific solution in the technical solution of the present application, the telescopic assembly includes a first sliding sleeve, a fixed sleeve and a second sliding sleeve; the fixed sleeve is slidably sleeved on the outside of the first sliding sleeve along a first direction; the second sliding sleeve is slidably sleeved on the outside of the fixed sleeve along the first direction; the driving assembly includes:

[0027] A motor, arranged on the fixed sleeve;

[0028] A first rack, disposed on the second sliding sleeve;

[0029] A second rack, disposed on the first sliding sleeve;

[0030] The third driving gear is arranged at the output end of the motor; the third driving gear is meshed with the first rack, the third driving gear is meshed with the second rack, and the first rack and the second rack are arranged on both sides of the third driving gear oppositely.

[0031] As a specific solution in the technical solution of the present application, the cross-section of the second sliding sleeve is also C-shaped, and the C-shaped opening of the second sliding sleeve faces upward.

[0032] Compared with the prior art, the beneficial effects of this application are:

[0033] The present application sets a telescopic component and a driving component between the tube and the detector, thereby achieving adjustable spacing between the tube and the detector. When performing oral scanning, the spacing between the tube and the detector can be adjusted to be small, and when performing head scanning, the spacing between the tube and the detector can be adjusted to be large. In other words, the present application only needs to set up a set of tubes and detectors to achieve the above two scanning functions, which can reduce both the manufacturing cost and the cost of daily maintenance and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a dental scanning device with a variable focal length proposed in an embodiment of the present application;

[0035] Figure 2 A three-dimensional schematic diagram of a dental scanning device with a variable focal length proposed in an embodiment of the present application (excluding a lifting column and a cantilever);

[0036] Figure 3 for Figure 2 A schematic diagram of the main view;

[0037] Figure 4 A schematic top view of a dental scanning device with a variable focal length proposed in an embodiment of the present application when it is retracted (excluding the lifting column and the cantilever);

[0038] Figure 5 for Figure 2 A three-dimensional schematic diagram of a telescopic component of a variable focal length dental scanning device when it is unfolded;

[0039] Figure 6 for Figure 5 A schematic diagram of the main view;

[0040] Figure 7 A schematic top view of another variable focal length dental scanning device proposed in an embodiment of the present application when it is retracted (excluding the lifting column and the cantilever);

[0041] Figure 8 A schematic top view of another variable focal length dental scanning device proposed in an embodiment of the present application when it is retracted (excluding the lifting column and the cantilever);

[0042] Fig. 9 for Figure 8 A schematic top view of a variable focal length dental scanning device when extended;

[0043] Fig.10 A schematic top view of another variable focal length dental scanning device proposed in an embodiment of the present application when it is retracted (excluding the lifting column and the cantilever);

[0044] Fig.11 A cross-sectional schematic diagram of a telescopic assembly proposed in an embodiment of the present application (the cross section is perpendicular to the length direction of the telescopic assembly);

[0045] Fig.12 This is a schematic cross-sectional view of another telescopic assembly proposed in an embodiment of the present application (the cross-section is perpendicular to the length direction of the telescopic assembly).

[0046] In the figure: 1, telescopic assembly; 11, first sliding sleeve; 111, first inner wall; 12, fixed sleeve; 121, second inner wall; 13, second sliding sleeve; 2, tube; 3, detector; 4, driving assembly; 401, third driving gear; 402, first rack; 403, second rack; 404, first threaded sleeve; 405, first lead screw; 406, first motor; 407, first driving gear; 408, first driven gear; 409, second threaded sleeve; 410, second lead screw; 411, second motor; 412, second driven gear; 413, second driving gear; 5, head; 6, lifting column; 7, cantilever. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] It should be noted that, in the description of the present application, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0049] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0050] It should be noted that like reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not require further detailed discussion and description in the description of the subsequent drawings.

[0051] In order to solve the technical problem of the high manufacturing cost of the existing dental scanning device that can perform both oral scanning and head scanning as mentioned in the background technology, the present application proposes a dental scanning device with a variable focal length, such as Figure 1 The figure shows a lifting column 6, a cantilever 7, a telescopic assembly 1, a ball tube 2 and a detector 3. The lifting column 6 can be moved in a vertical direction (i.e., Figure 1The telescopic component 1 is retracted in the direction A shown in the figure, and the cantilever 7 is arranged on the top of the lifting column 6. The telescopic component 1 is rotatably connected with the cantilever 7 through a rotating shaft (not shown in the figure), and the axis of the rotating shaft is parallel to the vertical direction. It is a mature technology to make two parts (i.e., the cantilever 7 and the lifting column 6) rotatably connected through a rotating shaft, which will not be described in detail here. A driving component 4 is arranged inside the telescopic component 1, and the driving component 4 is used to drive the telescopic component 1 to extend or shorten along a first direction. The first direction is parallel to the length direction of the telescopic component 1. Figure 1 and Figure 2 As shown, the ball tube 2 is arranged at a first end of the telescopic component 1 in the length direction, and the detector 3 is arranged at a second end of the telescopic component 1 in the length direction.

[0052] When in use, if it is necessary to scan the oral cavity, the telescopic component 1 can be driven by the driving component 4 to shorten along the first direction so that the distance between the tube 2 and the detector 3 is shorter (for example, Figure 3 If the head 5 needs to be scanned, the telescopic component 1 can be driven by the driving component 4 to extend along the first direction so that the distance between the tube 2 and the detector 3 is longer (for example, Figure 6 The distance S2 shown in the figure) is thereby conducive to scanning the head 5 as a whole.

[0053] That is to say, in the embodiment of the present application, by setting a telescopic component and a driving component between the tube and the detector, the distance between the tube and the detector is adjustable. When performing an oral scan, the distance between the tube and the detector can be adjusted to be small, and when performing a head scan, the distance between the tube and the detector can be adjusted to be large. In other words, in the embodiment of the present application, only one set of tubes and detectors is needed to realize the above two scanning functions, which can reduce both the manufacturing cost and the cost of daily maintenance and use.

[0054] In the embodiments of the present application, there is no limitation on the telescopic assembly 1, which only needs to be able to telescope under the drive of the driving assembly 4. For example, the telescopic assembly 1 can be at least as shown in the following two embodiments.

[0055] Embodiment 1 of telescopic assembly

[0056] In this embodiment, if Figure 4 As shown, the telescopic assembly 1 may include a first sliding sleeve 11 and a fixed sleeve 12, wherein the first sliding sleeve 11 is slidably sleeved inside the fixed sleeve 12 along a first direction. When in use, the driving assembly 4 only needs to drive the first sliding sleeve 11 to slide along the first direction to achieve the contraction or extension of the telescopic assembly 1. Figure 4As shown, in this embodiment, the tube 2 is arranged on the first sliding sleeve 11, and the detector 3 is arranged on the fixed sleeve 12. Of course, in other embodiments, the tube 2 can also be arranged on the fixed sleeve 12, and the detector 3 can be arranged on the first sliding sleeve 11.

[0057] Embodiment 2 of the telescopic assembly

[0058] It should be noted that the telescopic assembly shown in the first embodiment of the telescopic assembly still occupies a large space after being retracted, which is not conducive to use in application scenarios with relatively small spaces. In order to reduce the space occupied by the telescopic assembly after being retracted, in this embodiment, Figures 5 to 7 As shown, the telescopic assembly 1 includes a first sliding sleeve 11, a fixed sleeve 12, and a second sliding sleeve 13. The fixed sleeve 12 is slidably sleeved on the outside of the first sliding sleeve 11 along a first direction, and the second sliding sleeve 13 is slidably sleeved on the outside of the fixed sleeve 12 along the first direction. The driving assembly 4 is used to drive the first sliding sleeve 11 and the fixed sleeve 12 to slide along the first direction, and also to drive the second sliding sleeve 13 and the fixed sleeve 12 to slide along the first direction. Figure 5 As shown, the tube 2 is arranged on the first sliding sleeve plate 11, and the detector 3 is arranged on the second sliding sleeve plate 13. Of course, in other embodiments, the tube 2 can also be arranged on the second sliding sleeve plate 13, and the detector 3 can be arranged on the first sliding sleeve plate 11.

[0059] It is easy to understand that, assuming that the telescopic assembly 1 is fully extended, the distance between the tube 2 and the detector 3 (i.e. Figure 6 The distance S2 shown in the figure is 3 meters. If the telescopic assembly is as shown in the first embodiment, after the telescopic assembly 1 is fully extended, the distance between the tube 2 and the detector 3 is approximately equal to the sum of the lengths of the first sliding sleeve 11 and the fixed sleeve 12. Since the first sliding sleeve 11 and the fixed sleeve 12 can overlap each other after the telescopic assembly 1 is fully retracted, the distance between the tube 2 and the detector 3 (that is, Figure 3 The distance S1 shown in the figure can be controlled to be about 1.5 meters at the minimum. If the telescopic component is as shown in Example 2, after the telescopic component 1 is fully extended, the distance between the ball tube 2 and the detector 3 is approximately equal to the sum of the lengths of the first sliding sleeve 11, the fixed sleeve 12 and the second sliding sleeve 13. Since the first sliding sleeve 11, the fixed sleeve 12 and the second sliding sleeve 13 can overlap each other after the telescopic component 1 is fully retracted, the minimum distance between the ball tube 2 and the detector 3 can be controlled to be about 1 meter after the telescopic component 1 is fully retracted. In other words, the telescopic component proposed in this embodiment occupies a smaller space after retraction, which is conducive to use in application scenarios with relatively small spaces. At this point, the introduction of Example 2 of the telescopic component is completed.

[0060] In the embodiment of the present application, under the premise that the fixed sleeve 12 is slidably sleeved on the outside of the first sliding sleeve 11 along the first direction, and the second sliding sleeve 13 is slidably sleeved on the outside of the fixed sleeve 12 along the first direction, no restriction is imposed on the shapes and structures of the first sliding sleeve 11, the fixed sleeve 12, and the second sliding sleeve 13. For example, the first sliding sleeve 11, the fixed sleeve 12, and the second sliding sleeve 13 can all be tubular (can be a round tube, can also be a cylindrical ... Fig.11 square tube shape shown).

[0061] In order to facilitate the installation of the drive assembly 4 and other components inside the telescopic assembly, such as Fig.12 As shown, the first sliding sleeve plate 11, the fixed sleeve plate 12 and the second sliding sleeve plate 13 can be plates with C-shaped cross sections. The C-shaped openings of the first sliding sleeve plate 11 and the second sliding sleeve plate 13 face upward, and the C-shaped opening of the fixed sleeve plate 12 faces downward (i.e., Fig.12 Of course, in other embodiments of the present application, the C-shaped openings of the first sliding sleeve plate 11 and the second sliding sleeve plate 13 may face downward, while the C-shaped opening of the fixed sleeve plate 12 faces upward.

[0062] It should be noted that if the cross-sections of the first sliding sleeve 11, the fixed sleeve 12 and the second sliding sleeve 13 are all C-shaped, then Fig.12 As shown, the first sliding sleeve 11 has a first inner wall surface 111 facing the fixed sleeve 12, and the fixed sleeve 12 also has a second inner wall surface 121 facing the first sliding sleeve 11. And during the sliding process of the first sliding sleeve 11 and the second sliding sleeve 13, the first inner wall surface 111 and the second inner wall surface 121 will not interfere with any of the first sliding sleeve 11, the fixed sleeve 12 and the second sliding sleeve 13. That is to say, in this embodiment, the drive assembly 4 or other components can be installed on the first inner wall surface 111 and the second inner wall surface 121. In other words, the telescopic assembly proposed in this embodiment is conducive to installing the drive assembly 4 and other components inside it.

[0063] In the embodiment of the present application, there is no restriction on the driving assembly 4, which only needs to be able to drive the first sliding sleeve 11 and the second sliding sleeve 13 to reciprocate along the first direction. For example, in one embodiment of the present application, the driving assembly 4 may include an automatic push rod. Figure 4As shown, one end of the automatic push rod is connected to the first sliding sleeve 11, and the other end of the automatic push rod is connected to the fixed sleeve 12. When in use, if the automatic push rod is extended, the automatic push rod makes the first sliding sleeve 11 away from the fixed sleeve 12 along the first direction, that is, the telescopic assembly 1 is also extended; if the automatic push rod is shortened, the automatic push rod makes the first sliding sleeve 11 approach the fixed sleeve 12 along the first direction, that is, the telescopic assembly 1 is shortened. Of course, if the telescopic assembly 1 includes a second sliding sleeve 13, the automatic push rod can also be arranged between the second sliding sleeve 13 and the fixed sleeve 12.

[0064] In the embodiment of the present application, the automatic push rod can be an electric push rod or a hydraulic push rod. Both the electric push rod and the hydraulic push rod are mature technologies and will not be described in detail here.

[0065] In another embodiment of the present application, the driving assembly 4 may include a motor (not shown in the figure), a third driving gear 401, a first rack 402 and a second rack 403. The motor may be disposed on the fixed sleeve 12. Figure 7 As shown, the first rack 402 is arranged on the second sliding sleeve plate 13, and the second rack 403 is arranged on the first sliding sleeve plate 11. The third driving gear 401 is arranged at the output end of the motor, the third driving gear 401 is meshed with the first rack 402, and the third driving gear 401 is also meshed with the second rack 403, and the first rack 402 and the second rack 403 are arranged on both sides of the third driving gear 401 oppositely.

[0066] When in use, if the motor drives the third driving gear 401 to rotate, the rotating third driving gear 401 can drive the first rack 402 and the second rack 403 to move closer to or farther from each other along the first direction. It is easy to understand that since the first rack 402 is arranged on the second sliding sleeve 13 and the second rack 403 is arranged on the first sliding sleeve 11, if the first rack 402 and the second rack 403 move closer to each other along the first direction, the first sliding sleeve 11 and the second sliding sleeve 13 can also move closer to each other along the first direction, that is, the telescopic assembly 1 is shortened; if the first rack 402 and the second rack 403 move away from each other along the first direction, the first sliding sleeve 11 and the second sliding sleeve 13 can also move away from each other along the first direction, that is, the telescopic assembly 1 is extended.

[0067] It should be noted that when a gear and rack structure is used as the driving component 4 to control the extension or contraction of the telescopic component 1, if a force is applied to the tube 2 or the detector 3 along the length direction of the telescopic component 1, the position of the tube 2 or the detector 3 can be easily moved. If the position of the tube 2 or the detector 3 moves during use, accurate scanning cannot be performed. In order to make the position of the tube 2 or the detector 3 less susceptible to external forces during use, in one embodiment of the present application, the driving component 4 may include a first threaded sleeve 404, a first lead screw 405, a first motor 406, a first driving gear 407 and a first driven gear 408. Figure 8 and Fig. 9 As shown, the first threaded sleeve 404 is arranged on the first sliding sleeve plate 11. One end of the first lead screw 405 is rotatably connected to the fixed sleeve plate 12, and the first lead screw 405 is threadedly connected to the first threaded sleeve 404. The first motor 406 is arranged on the fixed sleeve plate 12, and the first driving gear 407 is arranged at the output end of the first motor 406. The first driven gear 408 is arranged on the first lead screw 405, and the first driven gear 408 is meshed with the first driving gear 407.

[0068] When in use, the first motor 406 drives the first driving gear 407 to rotate. Since the first driven gear 408 is meshed with the first driving gear 407, the rotating first driving gear 407 can also drive the first driven gear 408 to rotate. Since the first driven gear 408 is arranged on the first lead screw 405, the first driven gear 408 can drive the first lead screw 405 to rotate. Since the first lead screw 405 is threadedly connected with the first threaded sleeve 404, when the first lead screw 405 rotates, the first threaded sleeve 404 can move along the axial direction of the first lead screw 405. Since the first threaded sleeve 404 is arranged on the first sliding sleeve plate 11, if the first threaded sleeve 404 moves along the axial direction of the first lead screw 405, the first sliding sleeve plate 11 will also move along the axial direction (i.e., the first direction) of the first lead screw 405 under the drive of the first threaded sleeve 404.

[0069] Similarly, in order to drive the second sliding sleeve 13 to reciprocate along the first direction, in one embodiment of the present application, the driving assembly 4 may further include a second threaded sleeve 409, a second lead screw 410, a second motor 411, a second driving gear 413 and a second driven gear 412. Figure 8 and Fig. 9As shown, the second threaded sleeve 409 is arranged on the fixed sleeve plate 12. One end of the second lead screw 410 is rotatably connected to the second sliding sleeve plate 13, and the second lead screw 410 is threadedly connected to the second threaded sleeve 409. The second motor 411 is arranged on the second sliding sleeve plate 13, and the second driving gear 413 is arranged at the output end of the second motor 411. The second driven gear 412 is arranged on the second lead screw 410, and the second driven gear 412 is meshed with the second driving gear 413.

[0070] When in use, the second motor 411 drives the second driving gear 413 to rotate. Since the second driven gear 412 is meshed with the second driving gear 413, the rotating second driving gear 413 can also drive the second driven gear 412 to rotate. Since the second driven gear 412 is arranged on the second lead screw 410, the second driven gear 412 can drive the second lead screw 410 to rotate. Since the second lead screw 410 is threadedly connected with the second threaded sleeve 409, and the second threaded sleeve 409 is arranged on the fixed sleeve 12, if the second lead screw 410 rotates, the second lead screw 410 will move along its axial direction under the restriction of the second threaded sleeve 409. Since one end of the second lead screw 410 is rotatably connected with the second sliding sleeve 13, if the second lead screw 410 moves along its axial direction, the second lead screw 410 can also drive the second sliding sleeve 13 to move along its axial direction (that is, the first direction). In this embodiment, the distance between the ball tube 2 and the detector 3 is controlled by the lead screw and the threaded sleeve structure, so that even if an external force is applied to the ball tube 2 or the detector 3 during use, the distance between the ball tube 2 and the detector 3 can remain stable.

[0071] In this embodiment, there is no restriction on the installation position of the drive assembly 4 inside the telescopic assembly 1. In order to ensure that the drive assembly 4 does not interfere with the components installed on the fixed sleeve 12 when the telescopic assembly 1 is extended or shortened, such as Figure 8 and Fig.10 As shown, when the length of the telescopic assembly 1 is the shortest, the first motor 406 and the second motor 411 are both close to one end of the fixed sleeve 12 and away from the other end of the fixed sleeve 12. It should be noted that in the drive assembly 4 of this embodiment, the components that occupy a large space are the first motor 406 and the second motor 411. Since the first motor 406 and the second motor 411 are both close to one end of the fixed sleeve 12 when the length of the telescopic assembly 1 is the shortest, when the telescopic assembly 1 is extended or shortened, the first motor 406 and the second motor 411 with a larger volume will not cross the fixed sleeve 12 along the first direction. If the first motor 406 and the second motor 411 with a larger volume will not cross the fixed sleeve 12 along the first direction, it is difficult for the drive assembly 4 (that is, the first motor 406 and the second motor 411) to interfere with the components on the fixed sleeve 12.

[0072] It should be noted that the weight of the tube 2 is greater than the weight of the detector 3. In the driving assembly 4 of this embodiment, the weight of the first motor 406 and the second motor 411 are relatively heavy. In order to maintain the dynamic balance of the rotation of the telescopic assembly 1 during use, Figure 8 As shown, the first motor 406 and the second motor 411 may be located at one end of the fixed sleeve 12 close to the detector 3 .

[0073] In order to further reduce the possibility of interference between the driving assembly 4 and the components installed on the fixed sleeve 12, in one embodiment of the present application, Fig.10 As shown, when the length of the telescopic assembly 1 is the shortest, the first motor 406 and the second motor 411 are symmetrically arranged, and the first screw 405 and the second screw 410 are also symmetrically arranged. Fig.10 The distance D2 shown in FIG. 1 is greater than the distance between the first motor 406 and the second motor 411 (ie, the distance D2 shown in FIG. 1 is greater than the distance between the first motor 406 and the second motor 411 Fig.10 In this embodiment, relative to Figure 8 The layout of the middle drive assembly 4, Fig.10 The layout of the driving assembly 4 can form a sufficiently large installation space in the middle of the fixed sleeve 12. As can be seen from the foregoing, the components located in the installation space will not interfere with the first motor 406 or the second motor 411. In other words, after the components are installed in the installation space, the components located in the installation space are unlikely to interfere with the driving assembly 4 (that is, the first motor 406 and the second motor 411).

[0074] The embodiment of the variable focal length dental scanning device proposed in the present application realizes that the distance between the tube and the detector is adjustable by setting a telescopic component and a driving component between the tube and the detector. When performing an oral scan, the distance between the tube and the detector can be adjusted to a smaller distance, and when performing a head scan, the distance between the tube and the detector can be adjusted to a larger distance. In other words, in the embodiment of the present application, only one set of tubes and detectors is required to realize the above two scanning functions, which can reduce both the manufacturing cost and the cost of daily maintenance and use.

[0075] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A dental scanning device with variable focal length, characterized in that: include: A lifting column (6); the lifting column (6) is capable of being extended and retracted in a vertical direction; A cantilever (7) arranged on the top of the lifting column (6); A telescopic assembly (1); the telescopic assembly (1) is rotatably connected to the cantilever (7) via a rotating shaft, the axis of the rotating shaft being parallel to the vertical direction; the telescopic assembly (1) comprises a first sliding sleeve (11) and a fixed sleeve (12); the first sliding sleeve (11) is slidably sleeved inside the fixed sleeve (12) along a first direction; the first direction is parallel to the length direction of the telescopic assembly (1); the cross-sections of the first sliding sleeve (11) and the fixed sleeve (12) are both C-shaped; the C-shaped opening of the first sliding sleeve (11) faces upwards, and the C-shaped opening of the fixed sleeve (12) faces downwards; a driving assembly (4) is arranged inside the telescopic assembly (1), and the driving assembly (4) is at least used to drive the first sliding sleeve (11) to slide along the first direction; A ball tube (2) and a detector (3); the ball tube (2) is arranged at a first end of the telescopic component (1) in the length direction, and the detector (3) is arranged at a second end of the telescopic component (1) in the length direction.

2. The variable focal length dental scanning device according to claim 1, characterized in that: The driving assembly (4) comprises an automatic push rod; one end of the automatic push rod is connected to the first sliding sleeve (11), and the other end of the automatic push rod is connected to the fixed sleeve (12).

3. The variable focal length dental scanning device according to claim 1, characterized in that: The driving component (4) comprises: A first threaded sleeve (404) is arranged on the first sliding sleeve plate (11); a first lead screw (405); one end of the first lead screw (405) is rotatably connected to the fixed sleeve (12), and the first lead screw (405) is threadedly connected to the first threaded sleeve (404); A first motor (406) is arranged on the fixed sleeve (12); A first driving gear (407) is arranged at the output end of the first motor (406); A first driven gear (408) is arranged on the first lead screw (405); and the first driven gear (408) is meshed with the first driving gear (407).

4. The variable focal length dental scanning device according to claim 3, characterized in that: The telescopic assembly (1) further comprises a second sliding sleeve (13), wherein the second sliding sleeve (13) is slidably sleeved on the outside of the fixed sleeve (12) along a first direction; the telescopic assembly (1) is also used to drive the second sliding sleeve (13) and the fixed sleeve (12) to form a sliding connection along the first direction.

5. The variable focal length dental scanning device according to claim 4, characterized in that: The driving component (4) further comprises: A second threaded sleeve (409) is arranged on the fixed sleeve plate (12); a second lead screw (410); one end of the second lead screw (410) is rotatably connected to the second sliding sleeve (13), and the second lead screw (410) is threadedly connected to the second threaded sleeve (409); A second motor (411) is arranged on the second sliding sleeve (13); A second driving gear (413) is arranged at the output end of the second motor (411); The second driven gear (412) is arranged on the second lead screw (410); and the second driven gear (412) is meshed with the second driving gear (413).

6. The variable focal length dental scanning device according to claim 5, characterized in that: When the length of the telescopic assembly (1) is the shortest, the first motor (406) and the second motor (411) are both close to one end of the fixed sleeve (12) and away from the other end of the fixed sleeve (12).

7. The variable focal length dental scanning device according to claim 6, characterized in that: When the length of the telescopic assembly (1) is the shortest, the first motor (406) and the second motor (411) are symmetrically arranged; the first lead screw (405) and the second lead screw (410) are symmetrically arranged; and the distance between the first lead screw (405) and the second lead screw (410) is greater than the distance between the first motor (406) and the second motor (411).

8. The variable focal length dental scanning device according to claim 1, characterized in that: The telescopic assembly (1) comprises a first sliding sleeve (11), a fixed sleeve (12) and a second sliding sleeve (13); the fixed sleeve (12) is slidably sleeved on the outside of the first sliding sleeve (11) along a first direction; the second sliding sleeve (13) is slidably sleeved on the outside of the fixed sleeve (12) along the first direction; the driving assembly (4) comprises: A motor, arranged on the fixed sleeve (12); A first rack (402) is arranged on the second sliding sleeve (13); A second rack (403) is arranged on the first sliding sleeve (11); A third driving gear (401) is arranged at the output end of the motor; the third driving gear (401) is meshed with the first rack (402), the third driving gear (401) is meshed with the second rack (403), and the first rack (402) and the second rack (403) are arranged on both sides of the third driving gear (401) in a relative manner.

9. The variable focal length dental scanning device according to any one of claims 4 to 8, characterized in that: The cross section of the second sliding sleeve plate (13) is also C-shaped, and the C-shaped opening of the second sliding sleeve plate (13) faces upward.

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