Medical mobile phone structure and assembling method

Abstract

The invention relates to a medical mobile phone structure and an assembling method.The medical mobile phone structure comprises a fixing pipe, a supporting pipe assembly, an adjusting pipe and a transmission assembly, a mounting channel is formed in the fixing pipe, the axial direction of the fixing pipe is defined as the first direction, and the supporting pipe assembly and the adjusting pipe both extend in the first direction; the rear end of the supporting pipe assembly is inserted into the mounting channel, a pipeline communicated with the mounting channel is arranged in the supporting pipe assembly, the transmission assembly comprises a transmission shaft, and the rear end of the cutter is inserted into the pipeline and connected with the transmission shaft; the adjusting pipe is arranged on the periphery of the supporting pipe assembly in a sleeving mode, a spiral sliding groove is formed in the peripheral wall of one of the adjusting pipe and the supporting pipe assembly, the other one of the adjusting pipe and the supporting pipe assembly is provided with a first sliding piece located in the sliding groove, and the adjusting pipe is arranged to rotate around the axis of the adjusting pipe so as to drive the supporting pipe assembly to move front and back in the first direction. The cutter supporting length of the supporting pipe assembly can be adjusted, then the cutter supporting device is suitable for cutters with different lengths, and the adaptability is higher.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to a structure and an assembly method of a dental handpiece. Background Art

[0002] A power system handpiece generally includes a housing, a motor, and a tool. Among them, the housing can be held by a user's hand (such as a surgeon). The tool can be a grinding or rotary cutting operation grinding head, a planer, etc., and the motor provides power for the tool to help the user process the diseased position.

[0003] Due to different diseased positions, there are various tools based on actual needs. Different tools have differences in length, tooth shape, angle, etc. When the lengths of the tools are different, the current housing cannot support them well, so when the tool tip is under force during operation, a large jump (i.e., the tip deviates from the tool axis) occurs, which will affect the progress of the operation during actual operation. Summary of the Invention

[0004] Based on this, it is necessary to provide a structure of a dental handpiece that can reliably support tools with different lengths.

[0005] The present application provides a structure of a dental handpiece, including a fixed tube, a support tube assembly, an adjustment tube, and a transmission assembly capable of driving the tool to move. The interior of the fixed tube has an installation channel. Define the axial direction of the fixed tube as the first direction. The support tube assembly and the adjustment tube both extend along the first direction, and the rear end of the support tube assembly is inserted into the installation channel. At least part of the transmission assembly is arranged in the installation channel and is located behind the support tube assembly. The interior of the support tube assembly has a pipe communicating with the installation channel. The transmission assembly includes a transmission shaft extending along the first direction. The rear end of the tool is inserted into the pipe and is connected to the transmission shaft.

[0006] The adjustment tube is sleeved around the periphery of the support tube assembly, and a spiral chute is provided on the peripheral wall of one of the support tube assembly and the adjustment tube. A first sliding member located in the chute is provided on the peripheral wall of the other of the support tube assembly and the adjustment tube. The adjustment tube is arranged to be rotatable around its own axis, so as to drive the support tube assembly to move back and forth along the first direction.

[0007] In one embodiment, the chute is located on the inner peripheral wall of the adjustment tube, the first sliding member is installed on the outer peripheral wall of the support tube assembly, part of the fixed tube is located between the support tube assembly and the adjustment tube, and the fixed tube is provided with an opening for the first sliding member to pass through, and the opening extends along the first direction.

[0008] In one embodiment, the support tube assembly includes an outer tube and an inner tube assembly disposed within the outer tube. The first slider is disposed on the tube wall of the outer tube. The pipeline is located on the inner tube assembly. The inner tube assembly and the outer tube are coaxially arranged. The inner tube assembly includes a support bearing and a sleeve that are coaxially arranged. A hole snap ring is fixed inside the outer tube near the transmission assembly. A first elastic member is disposed between the hole snap ring and the inner tube assembly.

[0009] In one embodiment, the sleeve includes at least two sleeve units that are coaxially arranged. Support bearings are disposed at both the front and rear ends of the sleeve and between adjacent two of the sleeve units.

[0010] In one embodiment, rolling members are mounted on the adjustment tube. Stopping holes into which the rolling members can enter are formed in the fixed tube. There are at least two of the stopping holes, and they are arranged at intervals along the circumferential direction of the fixed tube. When the adjustment tube is in a rotating state, the stopping holes are located on the movement path of the rolling members.

[0011] In one embodiment, an elastic clamp is disposed between the adjustment tube and the fixed tube. The elastic clamp is sleeved around the periphery of the fixed tube corresponding to the position of the stopping holes.

[0012] In one embodiment, an annular groove extending along the circumferential direction of the fixed tube is provided on the outer peripheral wall of the fixed tube. A limiting portion located within the annular groove is provided on the inner peripheral wall of the adjustment tube.

[0013] In one embodiment, a positioning rod and a positioning hole that are inserted and matched with each other are disposed in a matching manner between the transmission shaft and the tool. The positioning rod extends along the first direction. One of the positioning rod and the positioning hole is disposed at one end of the transmission shaft close to the tool, and the other of the positioning rod and the positioning hole is disposed at one end of the tool close to the transmission shaft.

[0014] In one embodiment, the medical handpiece structure further includes a locking structure for locking or unlocking the tool and the transmission shaft. The locking structure is disposed on the transmission shaft.

[0015] In one embodiment, the transmission shaft is provided with an insertion channel for inserting the rear end of the tool, and the peripheral wall of the transmission shaft is provided with a through hole connected to the insertion channel, and the outer peripheral wall of the rear end of the tool is provided with a groove extending along the circumference of the tool, and the locking structure includes: an O-ring, which is sleeved on the periphery of the transmission shaft, and the inner peripheral wall of the O-ring is provided with a limiting member at a position corresponding to the through hole; a movable sleeve, which is sleeved on the periphery of the transmission shaft, and at least part of the movable sleeve is located behind the O-ring; a pushing component, which is transmission-connected with the movable sleeve to drive the movable sleeve to move between a first position and a second position along the first direction, the first position is located in front of the second position, when the movable sleeve is in the first position, at least part of the O-ring is located on the inner side of the movable sleeve, the limiting member passes through the through hole and is constrained in the groove, when the movable sleeve is in the second position, the movable sleeve is located behind the O-ring, and the limiting member is separated from the groove and located in the through hole.

[0016] In one embodiment, the transmission assembly further includes a first bearing and a second bearing mounted on the transmission shaft, the first bearing and the second bearing are both coaxially arranged with the transmission shaft, and the movable sleeve is located between the first bearing and the second bearing.

[0017] In one of the embodiments, the outer peripheral wall of the movable sleeve is provided with a flange extending outward, and the flange is located behind the O-ring; the fixed tube is provided with an inclined groove located behind the slide groove, and the inclined direction of the inclined groove is at an angle to the first direction and the circumferential direction of the fixed tube; the pushing assembly includes an adjusting ring, which is sleeved on the outer periphery of the fixed tube and is arranged to be able to rotate around its own axis; the inner peripheral wall of the adjusting ring is provided with a guide groove extending along the first direction; a transmission sleeve, which is sleeved on the outer periphery of the movable sleeve, and the transmission sleeve is located between the O-ring and the flange; a second sliding member is constrained on the peripheral wall of the transmission sleeve, and a portion of the second sliding member passes through the inclined groove and is located in the guide groove; a second elastic member abuts against the transmission sleeve, so that the transmission sleeve always has a tendency to move backward and abut against the flange; a third elastic member abuts against the movable sleeve, so that the movable sleeve always has a tendency to move forward.

[0018] In one of the embodiments, a first limit opening and a second limit opening connected to the inclined groove are respectively provided at both ends of the inclined groove, the first limit opening is located in front of the second limit opening, and when the movable sleeve is in the first position, the second sliding member is located in the first limit opening; when the movable sleeve is in the second position, the second sliding member is located in the second limit opening.

[0019] In one embodiment, the transmission assembly also includes a first bearing and a second bearing installed on the transmission shaft and coaxially arranged with the transmission shaft, the first bearing is located in front of the movable sleeve, the second bearing is located behind the movable sleeve, the second elastic member is located between the first bearing and the transmission sleeve, and the third elastic member is located between the flange and the second bearing.

[0020] The present application also provides an assembly method for a medical mobile phone structure, the medical mobile phone structure includes a fixed tube, a support tube assembly, an adjustment tube, a locking structure and a transmission assembly that can drive the tool to move, the locking structure is used to lock the tool and the transmission assembly or release the lock of the tool and the transmission assembly, the interior of the fixed tube has an installation channel, the length direction of the fixed tube is defined as a first direction, the support tube assembly and the adjustment tube both extend along the first direction, a spiral slide groove is provided on the peripheral wall of one of the adjustment tube and the support tube assembly, and a first sliding member located in the slide groove is provided on the peripheral wall of the other of the support tube assembly and the adjustment tube; the assembly method includes the following steps in sequence: S1. Install at least part of the locking structure on the transmission assembly, and then place the transmission assembly installed with the locking structure from back to front in the installation channel of the fixed tube; S2. Insert the rear end of the support tube assembly into the installation channel of the fixed tube, and then set the adjustment tube sleeve on the periphery of the fixed tube, and make the slide groove and the first sliding member slideably cooperate.

[0021] Compared with the prior art, in the medical mobile phone structure provided by the present application, when the adjustment tube rotates, the adjustment tube and the support tube assembly slide and cooperate with the first sliding member through the spiral slide groove, which will drive the support tube assembly to move back and forth along the first direction, thereby adjusting the length of the tool supported by the support tube assembly, and then adapting to tools of different lengths, with stronger adaptability. In addition, the support strength of the support tube assembly to the tool is adjusted according to the length of the tool to avoid large jumps when the front end (head end) of the tool is subjected to force during operation, reducing the adverse effects on the operation and better meeting the needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A cross-sectional view of the structure of a medical mobile phone according to an embodiment of the present application;

[0024] Figure 2Another perspective cross-sectional view of the structure of a medical handpiece according to an embodiment of the present application;

[0025] Figure 3 is Figure 2 the partial enlarged view at I in;

[0026] Figure 4 is Figure 2 the partial enlarged view at II in;

[0027] Figure 5 Schematic diagram of the structure of the adjustment tube in the structure of a medical handpiece according to an embodiment of the present application;

[0028] Figure 6 is Figure 5 the cross-sectional view of;

[0029] Figure 7 Schematic diagram of the structure of the support tube assembly in the structure of a medical handpiece according to an embodiment of the present application;

[0030] Figure 8 is Figure 7 the three-dimensional exploded structure diagram of;

[0031] Figure 9 Schematic diagram of the structure of the cutting tool according to an embodiment of the present application;

[0032] Figure 10 is Figure 9 the rear view of;

[0033] Figure 11 Schematic diagram of the structure of the fixed tube in the structure of a medical handpiece according to an embodiment of the present application;

[0034] Figure 12 Schematic diagram of the structure of the adjusting ring in the structure of a medical handpiece according to an embodiment of the present application;

[0035] Figure 13 Cross-sectional view of some structures in the structure of a medical handpiece according to an embodiment of the present application;

[0036] Figure 14 Three-dimensional exploded structure diagram of some structures in the structure of a medical handpiece according to an embodiment of the present application.

[0037] Reference numerals: 1, fixed pipe; 10, installation channel; 101, first channel; 102, second channel; 103, first step; 11, opening; 12, stop hole; 13, annular groove; 14, inclined groove; 141, first limiting port; 142, second limiting port; 2, support pipe assembly; 21, outer pipe; 211, first sliding member; 212, receiving hole; 22, inner pipe assembly; 220, pipeline; 221, support bearing; 222, sleeve; 2221, sleeve unit; 23, hole retaining ring; 24, bushing; 25, first elastic member; 3, adjusting pipe; 30, first installation hole; 31, sliding groove; 32, rolling member; 33, limiting portion; 34, assembly hole; 4, cutter; 40, head end; 41, positioning hole; 42, groove; 5, transmission assembly; 51, transmission shaft; 511, insertion channel; 512, through hole; 513, positioning rod; 52, first bearing; 53, second bearing; 6, elastic clamp; 7, locking structure; 71, O-ring; 711, limiting member; 72, movable sleeve; 721, inclined surface; 722, flange; 73, pushing assembly; 731, adjusting ring; 7311, guiding groove; 732, transmission sleeve; 7320, second installation hole; 7321, second sliding member; 733, second elastic member; 734, third elastic member; 74, extrusion cover; 75, shaft retaining ring; 8, housing; 81, assembly channel; 82, communication channel; 83, second step; 9, decorative ring. Detailed implementation manners

[0038] In order to make the above objects, features, and advantages of the present application more apparent and understandable, the following detailed description of the specific implementation manners of the present application will be given with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0039] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", "side", "top", "bottom", "front", "rear" and similar expressions used in the specification of this application are only used to describe various example structural parts and elements of this application. However, the use of these terms here is only for the purpose of convenience of description and is determined based on the example orientations shown in the drawings, and does not represent the only implementation manner. Since the disclosed embodiments of the application can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, the first feature can be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is at a lower horizontal height than the second feature.

[0042] It should be noted that "axially arranged" means that the overall arrangement direction is along the axis, including but not limited to axially extending and can form an angle with the axis.

[0043] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementation manners and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0044] As Figures 1 to 14As shown, the present application discloses a structure of a medical handpiece. As Figures 1 to 3 shown, the structure of the medical handpiece includes a fixed tube 1, a support tube assembly 2, an adjustment tube 3, and a transmission assembly 5 capable of driving a tool 4 to move. The inside of the fixed tube 1 has an installation channel 10. Define the axial direction of the fixed tube 1 as the first direction A. Both the support tube assembly 2 and the adjustment tube 3 extend along the first direction A. The rear end of the support tube assembly 2 is inserted into the installation channel 10. At least part of the transmission assembly 5 is arranged in the installation channel 10 and is located behind the support tube assembly 2. The transmission assembly 5 includes a transmission shaft 51 extending along the first direction A. The inside of the support tube assembly 2 has a pipeline 220 communicating with the installation channel 10. The rear end of the tool 4 is inserted into the pipeline 220 and is connected to the transmission shaft 51 of the transmission assembly 5. That is to say, the front end of the tool 4 is not located in the pipeline 220 of the support tube assembly 2.

[0045] It should be noted that in the present claims and the specification, "front" and "rear" refer to the direction facing the head end when the medical handpiece structure is held by hand, and the direction facing away from the head end is the rear. That is, "front" means "head"; "rear" means "tail". For example, the front end of the tool is the end of the tool far from the transmission shaft 51, and it is also the head end or the working end of the tool. The rear end of the tool is the end of the tool close to the transmission shaft 51.

[0046] The "front" and "rear" and similar expressions referred to in the present claims and the specification are only used to describe various example structural parts and elements of the present application. However, these terms are used here only for the purpose of convenience of description. Since it can be set in different directions, it can be adjusted according to the specific actual direction setting.

[0047] As Figures 1 to 6 shown, the adjustment tube 3 is sleeved on the periphery of the support tube assembly 2. A spiral chute 31 is provided on the peripheral wall of one of the adjustment tube 3 and the support tube assembly 2. The chute 31 extends along the first direction A. A first sliding member 211 located in the chute 31 is provided on the peripheral wall of the other of the support tube assembly 2 and the adjustment tube 3. The adjustment tube 3 is arranged to be able to rotate around its own axis, so as to drive the support tube assembly 2 to move back and forth along the first direction A.

[0048] In other embodiments, the first sliding member 211 is located on the inner peripheral wall of the adjustment tube 3, and the chute 31 is opened on the outer peripheral wall of the support tube assembly 2. In the present embodiment, the chute 31 is located on the inner peripheral wall of the adjustment tube 3, and the first sliding member 211 is installed on the outer peripheral wall of the support tube assembly 2. Part of the fixed tube 1 is located between the support tube assembly 2 and the adjustment tube 3, and the fixed tube 1 is provided with an opening 11 for the first sliding member 211 to pass through. The opening 11 extends along the first direction A.

[0049] It is understandable that when the adjustment tube 3 rotates, the adjustment tube 3 and the support tube assembly 2 slide with the first sliding member 211 through the spiral slide groove 31, which will drive the support tube assembly 2 to move back and forth along the first direction A, thereby adjusting the length of the support tube assembly 2 supporting the tool 4, and then adapting to tools 4 of different lengths, with stronger adaptability. In addition, the support strength of the support tube assembly 2 to the tool 4 is adjusted according to the length of the tool 4, so as to avoid large jumps of the front end (i.e., the head end 40) of the tool 4 when the force is applied during operation, thereby reducing the adverse effects on the operation and better meeting the needs of users.

[0050] like Figure 1 and Figure 2 As shown, the inner circumferential wall of the support tube assembly 2 is gap-matched with the outer circumferential wall of the tool 4 , so that when the support tube assembly 2 moves back and forth along the first direction A relative to the tool 4 , the tool 4 is prevented from interfering with the movement of the support tube assembly 2 .

[0051] The support tube assembly 2 may be in the form of a single tube, but at least from the perspective of reliable support of the tool 4, as Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the support tube assembly 2 includes an outer tube 21 and an inner tube assembly 22 disposed in the outer tube 21, a first sliding member 211 is disposed on the tube wall of the outer tube 21, and a pipe 220 is located on the inner tube assembly 22. In order to facilitate the installation of the first sliding member 211 on the outer tube 21, a receiving hole 212 for installing the first sliding member 211 is opened on the tube wall of the outer tube 21.

[0052] The inner tube assembly 22 is coaxially arranged with the outer tube 21 , and the inner tube assembly 22 includes a coaxially arranged support bearing 221 and a sleeve 222 . A hole retaining spring 23 is fixed in the outer tube 21 at a position close to the transmission assembly 5 , and a first elastic member 25 is arranged between the hole retaining spring 23 and the inner tube assembly 22 .

[0053] The cooperation of the inner tube assembly 22, the hole retaining spring 23 and the first elastic member 25 can effectively prevent the support bearing 221 and the sleeve 222 from being displaced along the first direction A, reduce the impact of processing errors, and the extrusion force generated by the first elastic member 25 can support the stationary ring of the bearing 221 to be fixed, and the inner ring of the support bearing 221 and the outer peripheral wall clearance of the tool 4 are matched to reduce frictional heat generation.

[0054] In addition, the support tube assembly 2 further includes a bushing 24 located between the inner tube assembly 22 and the hole retaining ring 23, and there are two bushings 24, which are arranged at intervals along the first direction A. The first elastic member 25 is located between the two bushings 24 and is a spring, and the front and rear ends of the first elastic member 25 are respectively against the bushings 24 on the corresponding side. When the tool 4 is inserted into the support tube assembly 2, the first elastic member 25 is sleeved on the periphery of the tool 4.

[0055] Further, the sleeve 222 includes at least two coaxially arranged sleeve units 2221, and support bearings 221 are provided at both the front and rear ends of the sleeve 222 and between adjacent two sleeve units 2221. In this way, it is convenient to adjust the length of the sleeve 222 according to actual needs. In addition, the lengths of the respective sleeve units 2221 are exactly the same, or the length of the sleeve unit 2221 closer to the front end is short, and the distribution is compact near the front end.

[0056] As Figures 1 to 6 shown, a rolling member 32 is mounted on the adjusting tube 3, and a stop hole 12 into which the rolling member 32 can enter is formed in the fixed tube 1. There are at least two stop holes 12, and they are arranged at intervals along the circumferential direction of the fixed tube 1. When the adjusting tube 3 is in a rotating state, the stop hole 12 is located on the movement path of the rolling member 32. It can be understood that during the rotation of the adjusting tube 3, the adjusting tube 3 can be stopped by the cooperation of the stop hole 12 and the rolling member 32.

[0057] In this embodiment, as Figure 11 shown, there are 10 stop holes 12. In this way, when the adjusting tube 3 rotates 36°, it will be self-locked and stopped once. It can be adjusted according to actual adjustment needs. Schematically, the number of stop holes 12 is more than 3, such as 3 - 9 or more than 10.

[0058] As Figures 1 to 6 shown, an elastic clamp 6 is provided between the adjusting tube 3 and the fixed tube 1, and the elastic clamp 6 is sleeved on the periphery of the fixed tube 1 corresponding to the position of the stop hole 12. It can be understood that the existence of the elastic clamp 6 fastens the rolling member 32 and maintains the self-locked state of the adjusting tube 3.

[0059] In order to facilitate the installation of the rolling member 32 on the adjusting tube 3, a first installation hole 30 for installing the rolling member 32 is formed in the tube wall of the adjusting tube 3, and the first installation hole 30 is a blind hole or a through hole. The rolling member 32 is a ball.

[0060] Further, an annular groove 13 extending along the circumferential direction of the fixed tube 1 is provided on the outer peripheral wall of the fixed tube 1, and a limiting portion 33 located in the annular groove 13 is provided on the inner peripheral wall of the adjusting tube 3. Through the cooperation of the limiting portion 33 and the annular groove 13, axial limitation of the adjusting tube 3 is achieved while it can rotate circumferentially.

[0061] The above-mentioned limiting portion 33 is a pin or a snap spring or a protrusion. The limiting portion 33 can be arbitrary, including common cylinders, polygons, etc., but it cannot affect the rotation of the adjusting tube 3. In this embodiment, the adjusting tube 3 is provided with an assembly hole 34 for installing the limiting portion 33, and the assembly hole 34 is a through hole penetrating the tube wall of the adjusting tube 3. In order to prevent the limiting portion 33 from coming out of the above-mentioned assembly hole 34, a decorative ring 9 is sleeved on the periphery of the adjusting tube 3.

[0062] As shown Figures 1 to 4 in the figure, the above-mentioned installation channel 10 includes a first channel 101 and a second channel 102 that are connected in sequence from front to back. A first step 103 is formed between the first channel 101 and the second channel 102. The above-mentioned support tube assembly 2 is inserted into the first channel 101, and the transmission assembly 5 is located in the second channel 102.

[0063] In order to achieve the driving connection between the transmission assembly 5 and the tool 4, as Figures 1 to 4 shown Figure 13 and Figure 14 in the figure, the above-mentioned transmission shaft 51 is provided with a plugging channel 511 for the rear end of the tool 4 to be inserted, and a through hole 512 communicating with the plugging channel 511 is provided on the peripheral wall of the transmission shaft 51. The connection between the transmission shaft 51 and the tool 4 is achieved through the plugging cooperation of the plugging channel 511 and the through hole 512.

[0064] In order to position the tool 4 during installation, a positioning rod 513 and a positioning hole 41 that are plugged and matched are arranged between the transmission shaft 51 and the tool 4. The positioning rod 513 extends along the first direction A. One of the positioning rod 513 and the positioning hole 41 is arranged at the end of the transmission shaft 51 close to the tool 4, that is, at the front end of the transmission shaft 51; the other of the positioning rod 513 and the positioning hole 41 is arranged at the end of the tool 4 close to the transmission shaft 51, that is, at the rear end of the tool 4.

[0065] In some other embodiments, the positioning rod 513 is located on the rear end face of the tool 4, and the positioning hole 41 is located on the end face of the plugging channel 511. In this embodiment, as Figure 10 shown Figure 13 in the figure, the positioning rod 513 is located on the end face of the plugging channel 511, and the positioning hole 41 is located on the rear end face of the tool 4.

[0066] In addition, the above-mentioned transmission shaft 51 rotates around its own axis, thereby driving the tool 4 to rotate. In order to limit the circumferential rotation of the tool 4 relative to the transmission shaft 51 after the rear end of the tool 4 is inserted into the plugging channel 511, in this embodiment, the rear end of the tool 4 has an insertion section with a non-circular cross section, and the plugging channel 511 has a matching section that matches the outer peripheral wall of the insertion section. Through the cooperation of the insertion section and the matching section, the circumferential constraint of the tool 4 is achieved.

[0067] As Figure 9 shown Figure 10 in the figure, a groove 42 extending along the circumferential direction of the tool 4 is provided on the outer peripheral wall of the rear end of the above-mentioned tool 4. In addition, the above-mentioned dental handpiece structure further includes a locking structure 7 for locking or unlocking the tool 4 and the transmission shaft 51, that is, the locking structure 7 is used to lock the tool 4 and the transmission assembly 5 or release the locking of the tool 4 and the transmission assembly 5. The aforementioned locking structure 7 is arranged on the transmission shaft 51.

[0068] In this embodiment, as Figures 1 to 4 , Figure 13 and Figure 14 shown, the above locking structure 7 includes an O-ring 71, a movable sleeve 72, and a pushing component 73. Among them, the O-ring 71 is sleeved on the outer periphery of the transmission shaft 51, and a limiting member 711 is provided on the inner peripheral wall of the O-ring 71 at a position corresponding to the through hole 512.

[0069] The movable sleeve 72 is sleeved on the outer periphery of the transmission shaft 51, and at least a part of the movable sleeve 72 is located behind the O-ring 71. The pushing component 73 is in transmission connection with the movable sleeve 72 to drive the movable sleeve 72 to move between a first position and a second position along a first direction A. The first position is in front of the second position. When the movable sleeve 72 is in the first position state, at least a part of the O-ring 71 is located inside the movable sleeve 72, and the limiting member 711 passes through the through hole 512 and is constrained in the groove 42, so that the tool 4 is locked to the transmission shaft 51. When the movable sleeve 72 is in the second position state, the movable sleeve 72 is located behind the O-ring 71, and the limiting member 711 disengages from the groove 42 and is located in the through hole 512, that is, the unlocking of the tool 4 is realized, and the tool 4 can be taken out from the pipeline 220.

[0070] In this way, through the above pushing component 73, the movable sleeve 72 can be switched between the first position and the second position. The movable sleeve 72 deforms the O-ring 71, and then the limiting member 711 on the O-ring 71 enters or exits the groove 42 to realize the locking or unlocking of the tool 4, and the whole process is convenient to operate.

[0071] As Figure 13 shown, the inner peripheral wall of the front end of the movable sleeve 72 has an inclined surface 721 that gradually inclines outward from back to front. When the movable sleeve 72 moves forward, the inclined surface 721 continuously squeezes the O-ring 71. At this time, the O-ring 71 holds the limiting member 711 thereon, and the limiting member 711 enters the groove 42.

[0072] There are at least two of the above limiting members 711, and they are arranged at intervals along the circumferential direction of the O-ring 71. Schematically, the limiting member 711 is two, three or more than three. In addition, the limiting member 711 is a steel ball or a convex part or other limiting bodies.

[0073] In addition, as Figures 1 to 4 , Figure 13 and Figure 14As shown, the above locking structure 7 further includes a pressing cover 74 sleeved around the outer periphery of the transmission shaft 51. The pressing cover 74 is located in front of the movable sleeve 72, and part of the O-ring 71 is located inside the pressing cover 74. An axial circlip 75 is also provided on the transmission shaft 51. There are two axial circlips 75, and they are arranged at intervals along the axial direction of the transmission shaft 51. The two axial circlips 75 are located between the first bearing 52 and the second bearing 53, while the pressing cover 74, the transmission sleeve, and the movable sleeve are all located between the two axial circlips 75, and the rear end face of the pressing cover 74 abuts against the front end face of the axial circlip 75 located in the front.

[0074] In other embodiments, the above-mentioned pushing assembly 73 may be a pushing sleeve fixedly connected to the movable sleeve 72. An operating portion passing through the fixed tube 1 is provided on the pushing sleeve. By pushing the operating portion along the first direction A, the pushing sleeve is driven to move back and forth along the first direction A, thereby driving the movable sleeve 72 to move.

[0075] In the present invention, a flange 722 extending outward is provided on the outer peripheral wall of the movable sleeve 72. The flange 722 is located behind the O-ring 71. An inclined groove 14 is provided on the fixed tube 1 behind the sliding groove 31. The inclined direction of the inclined groove 14 forms an angle with both the first direction A and the circumferential direction of the fixed tube 1.

[0076] In this embodiment, as Figures 1 to 4 and Figures 11 to 14 shown, the pushing assembly 73 includes an adjusting ring 731, a transmission sleeve 732, a second elastic member 733, and a third elastic member 734. Among them, the adjusting ring 731 is sleeved around the outer periphery of the fixed tube 1 and is arranged to be rotatable about its own axis. A guiding groove 7311 extending along the first direction A is provided on the inner peripheral wall of the adjusting ring 731.

[0077] The above-mentioned transmission sleeve 732 is sleeved around the outer periphery of the movable sleeve 72. The transmission sleeve 732 is located between the O-ring 71 and the flange 722. A second sliding member 7321 is constrained on the peripheral wall of the transmission sleeve 732. Part of the second sliding member 7321 passes through the inclined groove 14 and is located in the guiding groove 7311. The second elastic member 733 abuts against the transmission sleeve 732, so that the transmission sleeve 732 always has a tendency to move backward and abut against the flange 722. The third elastic member 734 abuts against the movable sleeve 72, so that the movable sleeve 72 always has a tendency to move forward.

[0078] Thus, the part of the second sliding member 7321 on the transmission sleeve 732 that penetrates out of the inclined groove 14 is located in the guiding groove 7311 of the adjusting ring 731. When the adjusting ring 731 rotates, the second sliding member 7321 slides along the inclined groove 14. Therefore, when the adjusting ring 731 rotates forward, such as clockwise, the second sliding member 7321 slides backward along the inclined groove 14. Since the second sliding member 7321 is arranged on the transmission sleeve 732, it will drive the transmission sleeve 732 to move backward. Since the flange 722 of the movable sleeve 72 is located behind the transmission sleeve 732, then, the transmission sleeve 732 pushes the movable sleeve 72 to move backward together until it moves to the second position. When the adjusting ring 731 rotates in the reverse direction, the second sliding member 7321 moves forward along the inclined groove 14. Since the second sliding member 7321 is arranged on the transmission sleeve 732, it will drive the transmission sleeve 732 to move forward so as to squeeze the second elastic member 733, and the movable sleeve 72 moves forward under the action of the third elastic member 734 until it moves to the first position.

[0079] Further, as Figures 1 to 4 and Figures 11 to 14 shown, both ends of the inclined groove 14 are respectively provided with a first limiting port 141 and a second limiting port 142 that communicate with the inclined groove 14. The first limiting port 141 is located in front of the second limiting port 142. When the movable sleeve 72 is in the first position state, the second sliding member 7321 is located in the first limiting port 141; when the movable sleeve 72 is in the second position state, the second sliding member 7321 is located in the second limiting port 142. The existence of the above-mentioned first limiting port 141 and second limiting port 142 locks the first position and the second position of the movable sleeve 72. The shapes of the above-mentioned first limiting port 141 and second limiting port 142 are not limited, as long as they can confine the second sliding member 7321 therein.

[0080] When installing the tool 4, rotate the adjusting ring 731 forward, and the movable sleeve 72 moves backward to the second position. At this time, the second sliding member 7321 is located in the second limiting port 142. Insert the tool 4 into the pipeline 220 of the support pipe assembly 2 until it cannot be pushed further. Then rotate the adjusting ring 731 in the reverse direction, and the movable sleeve 72 moves forward to the first position. At this time, the limiting member 711 of the O-ring 71 is inserted into the groove 42 of the tool 4, and the tool 4 is locked on the transmission shaft 51.

[0081] In order to realize the connection between the second sliding member 7321 and the transmission sleeve 732, a second installation hole 7320 for installing the second sliding member 7321 is formed on the outer peripheral wall of the transmission sleeve 732. The above-mentioned first sliding member 211 and second sliding member 7321 are both balls or steel balls or other spheres.

[0082] The above-mentioned transmission assembly 5 further includes a first bearing 52 and a second bearing 53 mounted on the transmission shaft 51. The first bearing 52 and the second bearing 53 are both coaxially arranged with the transmission shaft 51, and the movable sleeve 72 is located between the first bearing 52 and the second bearing 53. The presence of the first bearing 52 and the second bearing 53 ensures the coaxial accuracy of the entire transmission shaft 51 and further prevents the front end (head end) of the tool 4 from jittering when working under force.

[0083] In this embodiment, the first bearing 52 is located in front of the movable sleeve 72, the second bearing 53 is located behind the movable sleeve 72, the second elastic member 733 is located between the first bearing 52 and the transmission sleeve 732, and the above-mentioned third elastic member 734 is located between the flange 722 and the second bearing 53. Specifically, both the second elastic member 733 and the third elastic member 734 are springs sleeved on the periphery of the transmission shaft 51. The two ends of the second elastic member 733 respectively abut against the first bearing 52 and the front end of the transmission sleeve 732. The two ends of the third elastic member 734 respectively abut against the flange 722 and the second bearing 53.

[0084] In addition, the above-mentioned dental handpiece structure further includes a housing 8. The housing 8 has an assembly channel 81 for installing and fixing the fixing tube 1, and the housing 8 has a communication channel 82 communicating with the assembly channel 81. The rear end of the transmission shaft 51 is located in the communication channel 82. Specifically, a part of the second bearing 53 is located behind the fixing tube 1. A second step 83 is formed between the assembly channel 81 and the communication channel 82. When the fixing tube 1 is inserted into the assembly channel 81, the rear end of the fixing tube 1 abuts against the second step 83 through the second bearing 53, and the fixing tube 1 is fixedly connected to the housing 8. There are various ways to realize the fixed connection between the fixing tube 1 and the housing 8, and the snap connection method or the threaded connection method can be adopted.

[0085] The assembly method of the above-mentioned dental handpiece structure successively includes the following steps:

[0086] S1. Install at least a part of the locking structure 7 on the transmission assembly 5, and then place the transmission assembly 5 with the locking structure 7 installed thereon in the installation channel 10 of the fixed tube 1 from back to front. Specifically, install the part of the locking structure 7 other than the adjusting ring 731 on the transmission shaft 51, then sleeved the first bearing 52 and the second bearing 53 on the front and rear ends of the transmission shaft 51 respectively. Subsequently, insert the transmission assembly 5 into the second channel 102 of the fixed tube 1 from back to front until the first bearing 52 abuts against the first step 103. Then, after placing the fixed tube 1 into the assembly channel 81 of the housing 8, fix the fixed tube 1 on the housing 8. Subsequently, pass the second sliding member 7321 through the inclined slot 14 and place it in the second mounting hole 7320 of the transmission sleeve 732. Then, sleeve the adjusting ring 731 on the periphery of the fixed tube 1 and align the guiding slot 7311 of the adjusting ring 731 with the second sliding member 7321. At this time, the part of the second sliding member 7321 that penetrates out of the inclined slot 14 is located in the guiding slot 7311 of the adjusting ring 731, and the rear end of the adjusting ring 731 abuts against the front end of the housing 8.

[0087] S2. Insert the rear end of the support tube assembly 2 into the installation channel 10 of the fixed tube 1, and then sleeve the adjustment tube 3 on the periphery of the fixed tube 1 and make the sliding groove 31 slidably cooperate with the first sliding member 211. Specifically, insert the rear end of the support tube assembly 2 into the first channel 101 of the fixed tube 1, align the accommodating hole 212 of the support tube assembly 2 with the opening 11, and then place the first sliding member 211 into the accommodating hole 212 through the opening 11. Subsequently, first place the elastic clamp 6 at the top of the groove 42, then place the rolling member 32 into the positioning hole 12. When the elastic clamp 6 is held in the position of the positioning hole 12 and clamps the rolling member 32, then sleeve the adjustment tube 3 on the periphery of the fixed tube 1, and the part of the first sliding member 211 that penetrates out of the opening 11 is located in the sliding groove 31.

[0088] S3. Subsequently, place the limiting portion 33 into the annular groove 13 of the fixed tube 1, install the part of the limiting portion 33 that penetrates out of the annular groove 13 in the assembly hole of the adjustment tube 3. Then, sleeve the decorative ring 9 on the periphery of the adjustment tube 3 until the rear end of the decorative ring 9 abuts against the front end of the adjusting ring 731 to complete the assembly.

[0089] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0090] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A medical mobile phone structure, characterized in that: The invention comprises a fixed tube, a support tube assembly, an adjustment tube and a transmission assembly capable of driving a tool to move, wherein the fixed tube has an installation passage inside, the axial direction of the fixed tube is defined as a first direction, the support tube assembly and the adjustment tube both extend along the first direction, and the rear end of the support tube assembly is inserted into the installation passage, at least part of the transmission assembly is arranged in the installation passage and is located behind the support tube assembly, the support tube assembly has a pipe connected to the installation passage inside, the transmission assembly comprises a transmission shaft extending along the first direction, and the rear end of the tool is inserted into the pipe and connected to the transmission shaft; The adjustment tube is sleeved on the periphery of the support tube assembly, and a spiral groove is provided on the peripheral wall of the adjustment tube and one of the support tube assemblies. A first sliding member located in the groove is provided on the peripheral wall of the other of the support tube assembly and the adjustment tube. The adjustment tube is arranged to rotate around its own axis, thereby driving the support tube assembly to move forward and backward along the first direction.

2. The medical mobile phone structure according to claim 1, characterized in that: The slide groove is located on the inner circumferential wall of the adjustment tube, the first sliding member is installed on the outer circumferential wall of the support tube assembly, the fixed tube portion is located between the support tube assembly and the adjustment tube, and the fixed tube is provided with an opening for the first sliding member to pass through, and the opening extends along the first direction.

3. The medical mobile phone structure according to claim 2, characterized in that: The support tube assembly includes an outer tube and an inner tube assembly arranged in the outer tube, the first sliding member is arranged on the tube wall of the outer tube, the pipeline is located on the inner tube assembly, the inner tube assembly is coaxially arranged with the outer tube, and the inner tube assembly includes a coaxially arranged support bearing and sleeve, a hole retaining spring is fixed in the outer tube at a position close to the transmission assembly, and a first elastic member is arranged between the hole retaining spring and the inner tube assembly.

4. The medical mobile phone structure according to claim 3, characterized in that: The sleeve comprises at least two coaxially arranged sleeve units, and the support bearings are arranged at the front and rear ends of the sleeve and between two adjacent sleeve units.

5. The medical mobile phone structure according to claim 2, characterized in that: A rolling element is installed on the adjustment tube, and a stop hole for the rolling element to enter is opened on the fixed tube. There are at least two stop holes, which are arranged at intervals along the circumference of the fixed tube. When the adjustment tube is in a rotating state, the stop holes are located on the movement path of the rolling element.

6. The medical mobile phone structure according to claim 5, characterized in that: An elastic clamp is arranged between the adjustment tube and the fixed tube, and the elastic clamp is sleeved on the periphery of the fixed tube at a position corresponding to the stop hole.

7. The medical mobile phone structure according to claim 6, characterized in that: An annular groove extending along the circumference of the fixing tube is arranged on the outer circumferential wall of the fixing tube, and a limiting portion located in the annular groove is arranged on the inner circumferential wall of the adjusting tube.

8. The medical mobile phone structure according to claim 1, characterized in that: A plug-matched positioning rod and a positioning hole are provided between the transmission shaft and the tool, the positioning rod extends along the first direction, one of the positioning rod and the positioning hole is provided on one end of the transmission shaft close to the tool, and the other of the positioning rod and the positioning hole is provided on one end of the tool close to the transmission shaft.

9. The medical mobile phone structure according to any one of claims 1 to 8, characterized in that: The medical mobile phone structure further includes a locking structure for locking or unlocking the cutter and the transmission shaft, and the locking structure is arranged on the transmission shaft.

10. The medical mobile phone structure according to claim 9, characterized in that: The transmission shaft is provided with an insertion channel for inserting the rear end of the tool, and the peripheral wall of the transmission shaft is provided with a through hole connected to the insertion channel, and the outer peripheral wall of the rear end of the tool is provided with a groove extending along the circumference of the tool, and the locking structure includes: An O-ring is sleeved on the periphery of the transmission shaft, and a limiting member is provided on the inner circumferential wall of the O-ring at a position corresponding to the through hole; A movable sleeve, which is sleeved on the periphery of the transmission shaft, and at least a part of the movable sleeve is located behind the O-ring; A pushing assembly is transmission-connected to the movable sleeve to drive the movable sleeve to move between a first position and a second position along the first direction, wherein the first position is located in front of the second position, and when the movable sleeve is in the first position, at least a portion of the O-ring is located on the inner side of the movable sleeve, and the limiting member passes through the through hole and is constrained in the groove, and when the movable sleeve is in the second position, the movable sleeve is located behind the O-ring, and the limiting member is separated from the groove and located in the through hole.

11. The medical mobile phone structure according to claim 10, characterized in that: The transmission assembly further comprises a first bearing and a second bearing mounted on the transmission shaft, wherein the first bearing and the second bearing are both coaxially arranged with the transmission shaft, and the movable sleeve is located between the first bearing and the second bearing.

12. The medical mobile phone structure according to claim 10, characterized in that: The outer peripheral wall of the movable sleeve is provided with a flange extending outward, and the flange is located behind the O-ring. The fixed tube is provided with an inclined groove located behind the slide groove, and the inclined direction of the inclined groove is at an angle to the first direction and the circumferential direction of the fixed tube. The pushing assembly includes: an adjusting ring, which is sleeved on the periphery of the fixing tube and arranged to be rotatable around its own axis, and a guide groove extending along the first direction is formed on the inner peripheral wall of the adjusting ring; A transmission sleeve, sleeved on the outer periphery of the movable sleeve, the transmission sleeve is located between the O-ring and the flange, a second sliding member is constrained on the peripheral wall of the transmission sleeve, and a portion of the second sliding member passes through the inclined groove and is located in the guide groove; A second elastic member is in contact with the transmission sleeve, so that the transmission sleeve always has a tendency to move backward and contact with the flange; The third elastic member is in contact with the movable sleeve, so that the movable sleeve always has a tendency to move forward.

13. The medical mobile phone structure according to claim 12, characterized in that: The two ends of the inclined groove are respectively provided with a first limit opening and a second limit opening connected to the inclined groove, the first limit opening is located in front of the second limit opening, and when the movable sleeve is in the first position, the second sliding member is located in the first limit opening; when the movable sleeve is in the second position, the second sliding member is located in the second limit opening.

14. The medical mobile phone structure according to claim 12, characterized in that: The transmission assembly also includes a first bearing and a second bearing installed on the transmission shaft and arranged coaxially with the transmission shaft, the first bearing is located in front of the movable sleeve, the second bearing is located behind the movable sleeve, the second elastic member is located between the first bearing and the transmission sleeve, and the third elastic member is located between the flange and the second bearing.

15. A method for assembling a medical mobile phone structure, characterized in that: The medical mobile phone structure comprises a fixed tube, a support tube assembly, an adjustment tube, a locking structure and a transmission assembly capable of driving the tool to move, wherein the locking structure is used to lock the tool and the transmission assembly or to unlock the tool and the transmission assembly, wherein the interior of the fixed tube has an installation passage, and the length direction of the fixed tube is defined as a first direction, and the support tube assembly and the adjustment tube both extend along the first direction, and a spiral slide groove is provided on the peripheral wall of one of the adjustment tube and the support tube assembly, and a first sliding member located in the slide groove is provided on the peripheral wall of the other of the support tube assembly and the adjustment tube; and the assembly method comprises the following steps in sequence: S1. Installing at least part of the locking structure on the transmission assembly, and then placing the transmission assembly with the locking structure installed in the installation channel of the fixed tube from back to front; S2. Insert the rear end of the support tube assembly into the installation channel of the fixed tube, then arrange the adjustment tube sleeve around the fixed tube, and make the slide groove and the first sliding member slideably matched.

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