Positioning mechanism for oral CBCT device and oral CBCT device

Abstract

The present invention discloses a positioning mechanism for an oral CBCT device and an oral CBCT device. The positioning mechanism for an oral CBCT device comprises: a housing, the housing is suitable for being rotatably connected to a working arm of the oral CBCT device and has an adjustment slide and an operation port; a positioning ruler, the positioning ruler is movably matched with the adjustment slide and extends out of the housing from the operation port, one of the housing and the positioning ruler is configured to switch the positioning ruler between a fixed state and a mobile state through its own elastic deformation, the relative position of the positioning ruler with the adjustment slide is fixed in the fixed state, and the positioning ruler is movable in the adjustment slide in the mobile state. The positioning mechanism for an oral CBCT device according to the present invention can not only realize rotation, but also realize highly free adjustment, and is simple and reliable, and can meet the positioning requirements of patients for lateral position photography.

Description

Technical Field

[0001] The present invention relates to the technical field of oral CBCT devices, and in particular to a positioning mechanism for an oral CBCT device and an oral CBCT device having the positioning mechanism for the CBCT device. Background Art

[0002] The oral CBCT device in the related art is often used for CBCT lateral imaging. CBCT lateral imaging is generally used in dental orthodontic surgery. In order to obtain high-quality imaging, when the patient is in position, it is necessary to ensure that the lateral ear clip is positioned in the patient's ear hole, and the forehead positioning ruler is positioned at the root of the nose. The metal ruler imaging on the positioning ruler is used to provide a size reference. Because the height size of each person's ear hole relative to the root of the nose is different, after the ear hole is positioned with the lateral ear clip, the forehead positioning ruler must be able to move up and down to position it at the root of the nose; at the same time, in order to facilitate the patient's position, the forehead positioning ruler also needs to be designed to be rotatable. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a positioning mechanism for an oral CBCT device, which can not only realize rotation, but also realize free adjustment in its height direction, and is simple and reliable, and can meet the positioning requirements of lateral position photography of patients.

[0004] The present invention also provides an oral CBCT device having the positioning mechanism for the CBCT device.

[0005] According to an embodiment of the first aspect of the present invention, a positioning mechanism for an oral CBCT device comprises: a housing, the housing being adapted to be rotatably connected to a working arm of the oral CBCT device and having an adjustment slide and an operation port; a positioning ruler, the positioning ruler being movably matched with the adjustment slide and extending out of the housing from the operation port, wherein one of the housing and the positioning ruler is configured to enable the positioning ruler to switch between a fixed state and a movable state through its own elastic deformation, the relative position of the positioning ruler to the adjustment slide being fixed in the fixed state, and the positioning ruler being movable within the adjustment slide in the movable state.

[0006] The positioning mechanism for an oral CBCT device according to an embodiment of the present invention realizes the movement and fixation of the positioning ruler by utilizing the elastic deformation of the positioning ruler itself, so that it can not only rotate but also realize the free adjustment of height, and has a simple and reliable structure, and can meet the positioning requirements of lateral position photography of patients.

[0007] In addition, the positioning mechanism for the oral CBCT device according to the embodiment of the present invention also has the following additional technical features:

[0008] According to some embodiments of the present invention, the positioning ruler is provided with a plurality of elastic limit members, which are arranged at intervals and jointly define an elastic groove. When the positioning ruler is in the fixed state, the relative positions of the elastic limit members and the shell are fixed, and when the positioning ruler is in the moving state, the plurality of elastic limit members move toward the inside of the elastic groove.

[0009] In some embodiments of the present invention, the elastic groove is an open groove and passes through the upper end surface, the front side surface and the rear side surface of the positioning ruler respectively.

[0010] According to some embodiments of the present invention, the positioning mechanism for an oral CBCT device further includes: an adjusting member for pressing the elastic limit member toward the interior of the elastic groove, the shell having an adjusting port connected to the adjusting slide, the elastic limit member being visible from the adjusting port, and the adjusting member being movably matched with the adjusting port.

[0011] Furthermore, the adjusting member is mounted on the elastic limiting member.

[0012] In some embodiments of the present invention, a first positioning portion is provided in the adjusting slideway, a second positioning portion is provided on the elastic limiting member, and the first positioning portion and the second positioning portion cooperate with each other in the fixed state of the positioning ruler.

[0013] In some embodiments of the present invention, the shell includes: a front cover body; a rear cover body, wherein the rear cover body is connected to the front cover body and together defines the adjustment slideway, the operating port and the adjustment port.

[0014] According to some embodiments of the present invention, the positioning ruler is provided with a supporting limb, the fixed end of the supporting limb is connected to the positioning ruler and the free end is tilted in a direction away from the positioning ruler, the relative position of the supporting limb and the shell is fixed when the positioning ruler is in the fixed state, and the free end of the supporting limb of the positioning ruler is movable when the positioning ruler is in the moving state.

[0015] In some embodiments of the present invention, the supporting limb is formed by bending and tilting a portion of the positioning ruler, and a clearance groove is formed on the positioning ruler.

[0016] In some embodiments of the present invention, the clearance groove is a closed groove and passes through the front side and the rear side of the positioning ruler respectively.

[0017] According to some embodiments of the present invention, a supporting limb is provided on the adjustment slide, a fixed end of the supporting limb is connected to the shell and a free end is tilted toward the positioning ruler, the relative position of the positioning ruler and the supporting limb is fixed in the fixed state, and the positioning ruler is movable relative to the supporting limb in the moving state.

[0018] According to some embodiments of the present invention, the positioning mechanism for the oral CBCT device further includes: a connecting seat, wherein the connecting seat is suitable for being connected to the working arm and rotatably connected to the housing.

[0019] In some embodiments of the present invention, the positioning mechanism for the oral CBCT device further includes: a rotating shaft, the housing is provided with an axial hole, the connecting seat is provided with a rotating hole, the rotating shaft is installed in the axial hole and rotatably cooperates with the rotating hole.

[0020] Furthermore, the housing is provided with a plurality of plungers spaced apart along the circumference of the shaft hole, the connecting seat is provided with a plurality of positioning holes, and the plurality of plungers are suitable for matching with the plurality of positioning holes in a one-to-one correspondence.

[0021] An oral CBCT device according to an embodiment of the second aspect of the present invention includes the positioning mechanism for an oral CBCT device according to an embodiment of the first aspect of the present invention.

[0022] According to the oral CBCT device of the embodiment of the present invention, the positioning mechanism for the oral CBCT device as described above can realize the rotation of the positioning ruler and the free adjustment of the positioning ruler in the height direction. The structure is simple and reliable and can meet the positioning requirements of lateral imaging of patients.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an exploded view of a positioning mechanism for an oral CBCT device according to a first embodiment of the present invention;

[0025] Figure 2 is a schematic structural diagram of a positioning mechanism for an oral CBCT device according to a first embodiment of the present invention;

[0026] Figure 3 is a schematic structural diagram of a positioning mechanism for an oral CBCT device according to a first embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of a positioning ruler according to a first embodiment of the present invention;

[0028] Figure 5 is a schematic structural diagram of a positioning ruler according to a first embodiment of the present invention;

[0029] Figure 6 is a schematic structural diagram of a front cover according to a first embodiment of the present invention;

[0030] Figure 7 is a schematic structural diagram of a front cover according to a first embodiment of the present invention;

[0031] Figure 8 is a schematic structural diagram of a front cover according to a first embodiment of the present invention;

[0032] Fig. 9 is a schematic structural diagram of a rear cover according to a first embodiment of the present invention;

[0033] Fig.10 is a schematic structural diagram of a rear cover according to a first embodiment of the present invention;

[0034] Fig.11 is a schematic structural diagram of a rear cover according to a first embodiment of the present invention;

[0035] Fig.12 is a schematic structural diagram of a connecting socket according to a first embodiment of the present invention;

[0036] Fig.13 is a schematic structural diagram of a connecting socket according to a first embodiment of the present invention;

[0037] Fig.14 is a schematic structural diagram of a connecting socket according to a first embodiment of the present invention;

[0038] Fig.15 is a cross-sectional view of a connecting socket according to a first embodiment of the present invention;

[0039] Fig.16 is an exploded view of a positioning mechanism for an oral CBCT device according to a second embodiment of the present invention;

[0040] Fig.17 is a schematic structural diagram of a positioning mechanism for an oral CBCT device according to a second embodiment of the present invention;

[0041] Fig.18 is a schematic structural diagram of a positioning mechanism for an oral CBCT device according to a second embodiment of the present invention;

[0042] Fig.19 is a schematic structural diagram of a positioning mechanism for an oral CBCT device according to a second embodiment of the present invention;

[0043] Fig. 20is a schematic structural diagram of a positioning mechanism for an oral CBCT device according to a second embodiment of the present invention;

[0044] Fig.21 is a schematic structural diagram of a positioning ruler according to a second embodiment of the present invention;

[0045] Fig. 22 is a schematic structural diagram of a positioning ruler according to a second embodiment of the present invention;

[0046] Fig.23 is a schematic structural diagram of a positioning ruler according to a second embodiment of the present invention;

[0047] Fig.24 is a schematic structural diagram of a housing according to a second embodiment of the present invention;

[0048] Fig.25 is a schematic structural diagram of a housing according to a second embodiment of the present invention;

[0049] Fig.26 is a schematic structural diagram of a housing according to a second embodiment of the present invention;

[0050] Fig. 27 FIG. 4 is a schematic structural diagram of an oral CBCT device according to a second embodiment of the present invention.

[0051] Reference numerals:

[0052] Oral CBCT device 1, a positioning mechanism 10 for the oral CBCT device, a limiting plate 11, a lateral ear clip 20,

[0053] Connecting seat 100, rotating hole 101, positioning hole 102,

[0054] Shell 200, adjustment slide 201, operation port 202, adjustment port 203, first positioning portion 204, shaft hole 205, top screw hole 206, plunger hole 207, positioning column 208, positioning groove 209, front cover 210, circular boss 211, rear cover 220, adapter groove 221, plunger 230,

[0055] Positioning ruler 300, elastic limiting member 301, elastic groove 302, supporting limb 303, giving way groove 304, second positioning part 305, mounting groove 306, guide surface 307, adjusting member 310, ruler 320,

[0056] Rotating shaft 400. DETAILED DESCRIPTION

[0057] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0058] The following describes a positioning mechanism 10 for an oral CBCT device according to an embodiment of the first aspect of the present invention with reference to the accompanying drawings.

[0059] like Figure 1-Figure 26 As shown, the positioning mechanism 10 for an oral CBCT device according to an embodiment of the present invention includes: a housing 200 and a positioning ruler 300.

[0060] Specifically, the housing 200 is suitable for being connected to the working arm of the oral CBCT device. The housing 200 has an adjustment slide 201 and an operation port 202. For example, the adjustment slide 201 can extend in the up-down direction, and the adjustment slide 201 is connected to the operation port 202.

[0061] The positioning ruler 300 may be a plastic part. The positioning ruler 300 is movably arranged in the adjustment slide 201, and the positioning ruler 300 extends out of the housing 200 through the operation port 202. The positioning ruler 300 is provided with a mounting groove 306, and the mounting groove 306 is used to mount a scale 320 (for example, a metal scale). One of the housing 200 and the positioning ruler 300 is configured to switch the positioning ruler 300 between a fixed state and a movable state through its own elastic deformation. In the fixed state, the relative position of the positioning ruler 300 to the adjustment slide 201 is fixed, and in the movable state, the positioning ruler 300 is movable in the adjustment slide 201.

[0062] That is, the housing 200 is configured to allow the positioning ruler 300 to switch between a fixed state and a movable state through its own elastic deformation, or the positioning ruler 300 is configured to allow the positioning ruler 300 to switch between a fixed state and a movable state through its own elastic deformation, so that the height adjustment of the positioning ruler 300 can be achieved without providing an additional adjustment mechanism. For example, the state of the positioning ruler 300 can be switched by elastically deforming the positioning ruler 300 by a single-handed operation, so that the height adjustment and elastic deformation of the positioning ruler 300 can be unified.

[0063] Therefore, the positioning mechanism 10 for an oral CBCT device according to an embodiment of the present invention can not only be rotatable, but also can realize the movement and fixation of the positioning ruler 300 by utilizing the elastic deformation of the positioning ruler 300 or the housing 200 itself, and can also realize the free adjustment of height, and has a simple and reliable structure, convenient operation, and can meet the positioning requirements of lateral position photography of patients.

[0064] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, a plurality of elastic stoppers 301 are provided on the positioning ruler 300, and the plurality of elastic stoppers 301 are arranged at intervals, and the plurality of elastic stoppers 301 jointly define an elastic groove 302. For example, the elastic groove 302 may be in the form of a plane notch, or in the form of a cross groove. When the positioning ruler 300 is in a fixed state, the relative position of the elastic stoppers 301 and the housing 200 is fixed, that is, the elastic stoppers 301 abut against the housing 200, and the positioning ruler 300 is fixed to the housing 200 through the elastic stoppers 301. When the positioning ruler 300 is in a moving state, the free ends of the plurality of elastic stoppers 301 move toward the inside of the elastic groove 302, so that the elastic stoppers 301 can be separated from the housing 200 to allow the positioning ruler 300 to move.

[0065] Thus, the switching of the positioning ruler 300 between the fixed state and the moving state can be achieved by the elastic deformation of the free end of the elastic stopper 301. In this way, the positioning function of the positioning mechanism 10 for the oral CBCT device is realized by using a positioning ruler 300, and the structure is relatively simple and easy to control and operate.

[0066] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the elastic groove 302 can be an open groove, and the elastic groove 302 passes through the upper end surface, the front side surface and the rear side surface of the positioning ruler 300 respectively. In other words, the lower end surfaces of the multiple elastic stoppers 301 are fixed on the positioning ruler 300, and the multiple elastic stoppers 301 are arranged at intervals on the circumference of the elastic groove 302. For example, two elastic stoppers 301 are arranged at intervals in the left and right directions. At this time, the elastic stoppers 301 extend upward from the lower end surface of the elastic stoppers 301 to the free end thereof. In this way, the structural conditions for the elastic stoppers 301 to undergo elastic deformation can be met.

[0067] It can be understood that when the positioning ruler 300 is in a fixed state, the outer side surfaces of the plurality of elastic stoppers 301 can be in contact with the inner wall of the adjusting slideway 201; and by bringing the plurality of elastic stoppers 301 closer to each other, the outer side surfaces of the plurality of elastic stoppers 301 can be separated from the inner wall of the adjusting slideway 201, so that the positioning ruler 300 is switched to a moving state, at which time the height of the positioning ruler 300 can be adjusted. The outer side surface of the elastic stopper 301 refers to the wall surface of the elastic stopper 301 that faces away from the elastic groove 302.

[0068] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the positioning mechanism 10 for the oral CBCT device also includes: an adjusting member 310. The adjusting member 310 is used to press the elastic limit member 301 toward the inside of the elastic groove 302. The housing 200 has an adjusting port 203 connected to the adjusting slide 201, the elastic limit member 301 is visible from the adjusting port 203, and the adjusting member 310 is movably matched with the adjusting port 203. That is, the adjusting member 310 can be matched in the adjusting port 203 to elastically deform the elastic limit member 301. For example, the adjusting member 310 can extend into the adjusting slide 201 through the adjusting port 203, or a part of the elastic limit member 301 can extend out of the adjusting port 203 to form the adjusting member 310. In this way, one-handed operation can be achieved when adjusting the height of the positioning ruler 300, which is convenient for users.

[0069] For example, the left and right sides of the housing 200 are respectively provided with adjustment openings 203, and the adjustment members 310 can be matched in pairs in the corresponding adjustment openings 203. When no clamping force is applied to the adjustment members 310, the free end of the elastic limit member 301 is supported on the inner wall of the adjustment slide 201, the positioning ruler 300 is suspended in the adjustment slide 201, and the positioning ruler 300 is in a fixed state; when a clamping force is applied to the adjustment member 310, the elastic limit member 301 is pressed by the adjustment member 310 toward the inside of the elastic groove 301, and the positioning ruler 300 is in a movable state.

[0070] By adjusting the gap between the adjusting member 310 and the left and right side surfaces of the housing 200 , it can be ensured that during clamping, the positioning ruler 300 will not be deformed or damaged due to excessive force exceeding the elastic deformation limit.

[0071] Furthermore, if Figure 1 and Figure 2 As shown, the adjusting member 310 is mounted on the elastic limiting member 301. In this way, the structure is more stable and reliable, the structure is more compact, and shaking or unstable matching when the adjusting member 310 is clamped can be avoided, and the operation is more convenient.

[0072] In some embodiments of the present invention, Figure 1As shown, a first positioning portion 204 is provided in the adjusting slide 201, and a second positioning portion 305 is provided on the elastic stopper 301. Among them, the first positioning portion 204 and the second positioning portion 305 match each other in the fixed state of the positioning ruler 300. For example, one of the first positioning portion 204 and the second positioning portion 305 can be a protrusion, or the first positioning portion 204 and the second positioning portion 305 can match each other in shape, one of the first positioning portion 204 and the second positioning portion 305 is a protrusion and the other is a groove matching the protrusion, so that the matching is more secure; the first positioning portion 204 and the second positioning portion 305 of the positioning ruler 300 are separated from each other in the moving state. In this way, the state of the positioning ruler 300 when fixed can be made more stable, further improving the reliability and stability of the structure.

[0073] In some embodiments of the present invention, Figure 1 As shown, the housing 200 includes: a front cover 210 and a rear cover 220. The rear cover 220 is connected to the front cover 210 and together defines an adjustment slide 201, an operation port 202 and an adjustment port 203. Among them, one of the front cover 210 and the rear cover 220 is provided with a positioning column 208, and the other of the front cover 210 and the rear cover 220 is provided with a positioning groove 209, and the positioning column 208 is matched in the corresponding positioning groove 209. In this way, it is convenient to install the adjustment member 310, and it is convenient for the positioning ruler 300 to smoothly enter the adjustment slide 201.

[0074] In some embodiments of the present invention, the front cover 210 and the rear cover 220 are respectively provided with an adapting groove 221, and the adjusting slide 201 is composed of the adapting groove 221 on the front cover 210 and the adapting groove 221 on the rear cover 220; in other embodiments of the present invention, such as Figure 1 As shown, one of the front cover 210 and the rear cover 220 is provided with an adapting groove 221 , and the adjusting slide 201 is defined by the adapting groove 221 on the one of the front cover 210 and the rear cover 220 and the other of the front cover 210 and the rear cover 220 .

[0075] According to some embodiments of the present invention, Figure 21-23As shown, a support limb 303 is provided on the positioning ruler 300, and the fixed end of the support limb 303 is connected to the positioning ruler 300, and the free end of the support limb 303 is tilted in the direction away from the positioning ruler 300. In this way, the positioning ruler 300 can be positioned by the abutment between the free end of the support limb 303 and the inner wall of the adjustment slide 201. When the positioning ruler 300 is in a fixed state, the relative position of the support limb 303 and the housing 200 is fixed, and when the positioning ruler 300 is in a moving state, the free end of the support limb 303 can be moved. Among them, the free end of the support limb 303 can be provided with a guide surface 307, for example, the support limb 303 extends from bottom to top and tilted backward, and the guide surface 307 extends from bottom to top and tilted forward, so as to facilitate the support limb 303 to smoothly pass through the operation port 202 and enter the adjustment slide 201.

[0076] In some embodiments of the present invention, Fig.17 As shown, the friction between the supporting limb 303 and the inner wall of the adjusting slideway 201 of the positioning ruler 300 in the fixed state fixes the relative position between the supporting limb 303 and the housing 200. In other words, the supporting limb 303 is elastically deformed under the squeezing action of the inner wall of the adjusting slideway 201, so that the friction force is generated between the supporting limb 303 and the inner wall of the adjusting slideway 201, so that the positioning ruler 300 can be kept in a fixed state under the action of the friction force.

[0077] In some embodiments of the present invention, Fig.23 As shown, the support limb 303 is formed by bending and tilting a part of the positioning ruler 300, and the support limb 303 forms a clearance groove 304 on the positioning ruler 300. In this way, when the positioning ruler 300 is assembled in place, the support limb 303 is elastically deformed, and the free end of the support limb 303 moves toward the inside of the clearance groove 304. When the height needs to be adjusted, the positioning ruler 300 can be directly pulled.

[0078] Furthermore, if Figure 21-23 As shown, the clearance groove 304 can be a closed groove, and the clearance groove 304 passes through the front side and the rear side of the positioning ruler 300 respectively. For example, the supporting limb 303 can be set as a cantilever structure, the lower end surface of the cantilever is fixed on the lower end surface of the elastic groove 302, and the cantilever extends upward from the lower end surface of the supporting limb 303 to form a free end, and the free end of the cantilever is tilted in the direction away from the positioning ruler 300. In this way, not only can the structural conditions for the elastic deformation of the supporting limb 303 be met, but also the structures of the supporting limb 303 and the elastic groove 302 can be made more flexible and diverse.

[0079] It can be understood that the overall thickness of the positioning ruler 300 including the cantilever can be greater than the distance between the front inner wall and the rear inner wall of the adjusting slide 201 , thereby ensuring that the positioning ruler 300 is securely positioned in the adjusting slide 201 .

[0080] According to some embodiments of the present invention, a support limb 303 is provided on the adjustment slide 201, the fixed end of the support limb 303 is connected to the housing 200, the free end of the support limb 303 is tilted toward the positioning ruler 300, the relative position of the positioning ruler 300 and the support limb 303 is fixed in a fixed state, and the positioning ruler 300 is movable relative to the support limb 303 in a moving state. For example, the support limb 303 is provided on the inner wall of the housing 200, and the support limb 303 can be set as a cantilever structure. In this way, the height adjustment of the positioning ruler 300 can be achieved by utilizing the elastic deformation of the housing 200 itself.

[0081] According to some embodiments of the present invention, Figure 1 As shown, the positioning mechanism 10 for the oral CBCT device further includes: a connection seat 100. The connection seat 100 is suitable for connecting with the working arm of the oral CBCT device. For example, the connection seat 100 can be a separate part, and the connection seat 100 is suitable for assembly and connection with the working arm; for another example, the connection seat 100 can also be a part extending from the working arm. The housing 200 is rotatably connected to the connection seat 100. In this way, the rotation function can be realized through the connection seat 100.

[0082] In some embodiments of the present invention, Figure 1 As shown, the positioning mechanism 10 for the oral CBCT device further includes a rotating shaft 400 .

[0083] Specifically, the front end face of the housing 200 is provided with an axial hole 205, and the connecting seat 100 is provided with a rotating hole 101 that passes through the front end face and the rear end face thereof. The rotating shaft 400 passes through the rotating hole 101 and is installed in the axial hole 205, and the rotating shaft 400 and the rotating hole 101 are rotatably matched. The upper end face of the housing 200 is also provided with a top screw hole 206, and the top screw is matched in the top screw hole 206. The top screw fixes the axial and circumferential directions of the rotating shaft 400, that is, the top screw limits the movement of the rotating shaft 400 in the axial and circumferential directions. In this way, the rotation function of the positioning ruler 300 can be realized. For example, the rotating shaft 400 can be a pin.

[0084] Furthermore, if Figure 1 As shown, the housing 200 is provided with a plurality of plungers 230 spaced along the circumference of the shaft hole 205, and the connection seat 100 is provided with a plurality of positioning holes 102, and the plurality of plungers 230 are suitable for matching with the plurality of positioning holes 102 in a one-to-one correspondence. For example, the plunger 230 can be a ball plunger, and the ball plunger is elastically pressed against the rear end surface of the connection seat 100, and each time it rotates a certain angle (for example, 90°), the ball plunger can match with the positioning hole 102 to perform positioning. In this way, positioning can be performed during rotation to prevent the positioning ruler 300 from hanging down due to gravity during the rotation process.

[0085] The positioning mechanism 10 for an oral CBCT device according to a specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0086] Embodiment 1:

[0087] like Figure 1-Figure 15 As shown, the positioning mechanism 10 for the oral CBCT device of this embodiment includes: a positioning ruler 300, a metal ruler embedded therein, a front cover 210, a rear cover 220, a plunger 230, a connecting seat 100 and a rotating shaft 400. The left and right side walls of the front cover 210 and the left and right side walls of the rear cover 220 extend inwards to form a limit plate 11, and a tooth-shaped first positioning portion 204 is provided on the limit plate 11. A hollow circular boss 211 is provided on the upper front side of the front cover 210, and four plunger holes 207 are evenly distributed on the circular boss 211. The plungers 230 are installed in the corresponding plunger holes 207, and at least two or four plungers 230 are symmetrically arranged.

[0088] like Figure 7 As shown, four positioning holes 102 are evenly arranged on the rear end face of the connecting seat 100. The upper end face of the circular boss 211 of the front cover body 210 is provided with a top screw hole 206, and the top screw fixes the rotating shaft 400 in the axial and circumferential directions. The plunger 230 can be a ball head plunger, and the ball head plunger is elastically pressed against the rear end face of the connecting seat 100. Every time it rotates a certain angle (for example, 90°), the ball head plunger can cooperate with the positioning hole 102 for positioning. The upper end of the connecting seat 100 is connected to the working arm by screws, so that the housing 200 formed by the front cover body 210 and the rear cover body 220 can rotate around the rotating shaft 400 and be positioned by the plunger 230.

[0089] The upper end of the positioning ruler 300 is provided with an elastic groove 302, and the elastic groove 302 respectively passes through the upper end surface, the front side surface and the rear side surface of the positioning ruler 300. Figure 8 As shown, the adjusting member 310 can be a lug, which is respectively installed on the left side of the left elastic limiter 301 and the right side of the right elastic limiter 301 for the fingers to hold. When the lugs on both sides are clamped, the elastic limiter 301 can be deformed toward the middle. Among them, a limit plate 11 extending to the left is provided on the left side of the left elastic limiter 301, and a limit plate 11 extending to the right is provided on the right side of the right elastic limiter 301. A tooth-shaped second positioning portion 305 is provided on the limit plate 11, and the distance between the fine teeth on the left and right elastic limiters 301 is slightly greater than the distance between the fine teeth on the front cover 210 and the rear cover 220.

[0090] During assembly, the elastic stopper 301 pre-presses its fine teeth to cooperate with the fine teeth of the front cover 210 and the rear cover 220, thereby locking the housing 200. Figure 3As shown, the lug extends out from the adjustment opening 203 on the housing 200. In the absence of clamping force, the fine teeth of the elastic limiter 301 are elastically pressed and matched with the fine teeth of the housing 200, and the positioning ruler 300 can be suspended at any height. When the height needs to be adjusted, the clamping lug causes the elastic limiter 301 to deform inward, and the fine teeth are engaged and disengaged to achieve free movement up and down. When released, the elastic limiter 301 restores its shape and the fine teeth are engaged and suspended. By controlling the gap between the lug and the left and right sides of the housing 200, it can be ensured that when clamping, the positioning ruler 300 will not be deformed or damaged due to excessive force that exceeds the elastic deformation limit.

[0091] The positioning mechanism for an oral CBCT device according to an embodiment of the present invention realizes the movement and fixation of the positioning ruler by utilizing the elastic deformation of the positioning ruler itself, so that it can not only rotate but also realize the free adjustment of height, and has a simple and reliable structure, and can meet the positioning requirements of lateral position photography of patients.

[0092] Embodiment 2:

[0093] like Figure 12-Figure 26 As shown, the positioning mechanism 10 for the oral CBCT device of this embodiment includes: a positioning ruler 300 , a metal ruler embedded therein, a housing 200 , a plunger 230 , a connecting seat 100 and a rotating shaft 400 .

[0094] like Fig.25 As shown, the adjustment slideway 201 is a hollow rectangular groove. Fig.19 As shown, the positioning ruler 300 is provided with a mounting groove 306 that matches the metal ruler, and the lower end of the positioning ruler 300 is tilted so as to facilitate contact with the root of the nose. The positioning ruler 300 is provided with a closed clearance groove 304, which passes through the front side and the rear side of the positioning ruler 300 respectively. The supporting limb 303 of the positioning ruler 300 is set as a cantilever structure with a tilted upper end, the lower end surface of the cantilever is connected to the bottom wall of the clearance groove 304, the upper end of the cantilever is tilted backward, and the upper end of the cantilever is provided with a guide surface 307. The thickness of the positioning ruler 300 itself is less than the width of the adjustment slide 201 in the front-to-back direction, but when it includes the cantilever, the overall thickness is greater than the width of the adjustment slide 201 in the front-to-back direction.

[0095] During assembly, since the guide surface 307 is located behind the rear surface of the positioning ruler 300, the upper end of the positioning ruler 300 can be easily inserted into the adjustment slide 201 through the operation port 202. As the cantilever extends into the adjustment channel, the elastic deformation of the cantilever clamps the positioning ruler 300 in the adjustment slide 201 to achieve hovering at any height. During design, the friction force formed by the elastic support can be adjusted by adjusting the thickness and interference of the cantilever, thereby ensuring the damping effect. The other structures of the positioning mechanism 10 for the oral CBCT device of this embodiment are similar to those in Example 1 and are not described in detail here.

[0096] The positioning mechanism for an oral CBCT device according to an embodiment of the present invention realizes the movement and fixation of the positioning ruler by utilizing the elastic deformation of the positioning ruler itself, so that it can not only rotate but also realize the free adjustment of height, and has a simple and reliable structure, and can meet the positioning requirements of lateral position photography of patients.

[0097] The following describes an oral CBCT device 1 having the positioning mechanism 10 for an oral CBCT device according to a second aspect of the present invention with reference to the accompanying drawings.

[0098] According to an embodiment of the present invention, an oral CBCT device 1 is Fig. 27 As shown, it includes a positioning mechanism 10 for an oral CBCT device according to an embodiment of the first aspect of the present invention and a lateral ear clip 20. The lateral ear clip 20 is used to be positioned in the ear hole of a patient.

[0099] According to the oral CBCT device 1 of the embodiment of the present invention, the positioning mechanism 10 for the oral CBCT device as described above can not only realize the rotation of the positioning ruler 300, but also realize the free adjustment of the height of the positioning ruler 300, and the structure is simple and reliable, which can meet the positioning requirements of lateral imaging of patients.

[0100] Other structures and operations of the oral CBCT device 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0101] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0102] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0103] In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features. A first feature "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features through another feature between them instead of direct contact. A first feature "above", "above" or "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature.

[0104] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "specific embodiments", "examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0106] Although the embodiments of the present invention 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 invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A positioning mechanism for an oral CBCT device, characterized in that: include: A housing, the housing being adapted to be rotatably connected to the working arm of the oral CBCT device and having an adjustment slide and an operation port; A positioning ruler is movably matched with the adjustment slide and extends out of the shell from the operation port. One of the shell and the positioning ruler is configured to enable the positioning ruler to switch between a fixed state and a movable state through its own elastic deformation. The relative position of the positioning ruler and the adjustment slide is fixed in the fixed state, and the positioning ruler is movable in the adjustment slide in the movable state.

2. The positioning mechanism for an oral CBCT device according to claim 1, characterized in that: The positioning ruler is provided with a plurality of elastic limiters, which are arranged at intervals and jointly define an elastic groove. When the positioning ruler is in the fixed state, the relative positions of the elastic limiters and the shell are fixed. When the positioning ruler is in the moving state, the plurality of elastic limiters move toward the inside of the elastic groove.

3. The positioning mechanism for an oral CBCT device according to claim 2, characterized in that: The elastic groove is an open groove and passes through the upper end surface, the front side surface and the rear side surface of the positioning ruler respectively.

4. The positioning mechanism for an oral CBCT device according to claim 2, characterized in that: Also includes: The adjusting member is used to press the elastic limiting member toward the inside of the elastic groove, the shell has an adjusting port connected to the adjusting slideway, the elastic limiting member is visible from the adjusting port, and the adjusting member is movably matched with the adjusting port.

5. The positioning mechanism for an oral CBCT device according to claim 4, characterized in that: The adjusting member is mounted on the elastic limiting member.

6. The positioning mechanism for an oral CBCT device according to claim 4, characterized in that: A first positioning portion is provided in the adjusting slideway, a second positioning portion is provided on the elastic limiting member, and the first positioning portion and the second positioning portion cooperate with each other in the fixed state of the positioning ruler.

7. The positioning mechanism for an oral CBCT device according to claim 4, characterized in that: The housing comprises: Front cover body; A rear cover body is connected to the front cover body and together defines the adjustment slideway, the operating port and the adjustment port.

8. The positioning mechanism for an oral CBCT device according to claim 1, characterized in that: The positioning ruler is provided with a supporting limb, the fixed end of the supporting limb is connected to the positioning ruler and the free end is tilted in the direction away from the positioning ruler. When the positioning ruler is in the fixed state, the relative position of the supporting limb and the shell is fixed, and when the positioning ruler is in the moving state, the free end of the supporting limb is movable.

9. The positioning mechanism for an oral CBCT device according to claim 8, characterized in that: The supporting limb is formed by bending and tilting a part of the positioning ruler, and a clearance groove is formed on the positioning ruler.

10. The positioning mechanism for an oral CBCT device according to claim 9, characterized in that: The clearance groove is a closed groove and passes through the front side surface and the rear side surface of the positioning ruler respectively.

11. The positioning mechanism for an oral CBCT device according to claim 1, characterized in that: The adjusting slide is provided with a supporting limb, the fixed end of the supporting limb is connected to the shell and the free end is tilted toward the positioning ruler, the relative position of the positioning ruler and the supporting limb is fixed in the fixed state, and the positioning ruler is movable relative to the supporting limb in the moving state.

12. The positioning mechanism for an oral CBCT device according to any one of claims 1 to 11, characterized in that: Also includes: A connecting seat, wherein the connecting seat is suitable for being connected to the working arm and is rotatably connected to the shell.

13. The positioning mechanism for an oral CBCT device according to claim 12, characterized in that: Also includes: A rotating shaft, a shaft hole is provided on the shell, a rotating hole is provided on the connecting seat, and the rotating shaft is installed in the shaft hole and rotatably matched with the rotating hole.

14. The positioning mechanism for an oral CBCT device according to claim 13, characterized in that: The housing is provided with a plurality of plungers which are spaced apart along the circumference of the shaft hole, and the connecting seat is provided with a plurality of positioning holes. The plurality of plungers are suitable for matching with the plurality of positioning holes in a one-to-one correspondence.

15. An oral CBCT device, characterized in that: The method comprises a positioning mechanism for an oral CBCT device according to any one of claims 1 to 14.

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