Handpiece limit guide cylinder structure and dental implant guide limit tool set

Abstract

The present invention relates to a machine head limiting guide cylindrical structure and a dental implant limiting tool group and a dental implant guiding limiting tool group, wherein the machine head limiting guide cylindrical structure comprises a C-shaped plate, a machine head adapting structure and a C-shaped tube structure, the C-shaped plate has an inner concave notch and a first side and a second side opposite to each other, the machine head adapting structure is arranged on the first side, and has a first lateral opening connected to the inner concave notch, the machine head accommodating space is provided in the machine head adapting structure, the C-shaped tube structure is arranged on the second side, and has a second lateral opening connected to the inner concave notch, the outer diameter of the C-shaped tube structure is smaller than the outer diameter of the C-shaped plate, so that the C-shaped tube structure can penetrate into the drilling position between the teeth; therefore, the present invention is conducive to limiting the maximum cutting depth of the drilling hole during dental implantation, the handheld machine and the tool are not easy to deflect and shake, and the machine head limiting guide cylindrical structure does not occupy the operating space.

Description

Technical Field

[0001] The invention relates to a guide sleeve, in particular to a head limiting guide cylindrical structure which is adapted to a dental mobile phone and can limit the drilling depth, a dental implant limiting tool set and a dental implant guiding limiting tool set. Background Art

[0002] With the development of dental technology, more and more patients choose to use dental implants to solve the problem of missing teeth. Dental implants are a method of implanting metal implants (artificial tooth roots) into the alveolar bone of the mouth to replace the original tooth roots. After a period of time, after the implants are tightly integrated with the bones, artificial crowns or bridges are installed to restore their beauty and chewing function.

[0003] Dental implant is an invasive tooth restoration technology. Before the metal implant is implanted into the alveolar bone of the oral cavity, a hole of appropriate size must be cut on the alveolar bone using a handpiece. The handpiece is equipped with a tool of appropriate size, and the doctor then drives the tool to drill holes in the alveolar bone by holding the handpiece. However, in most cases, there are other teeth on both sides of the drilling position, and the patient's mouth opening is limited, which limits the operating space for cutting. On the other hand, during the drilling process, the doctor must carefully use vision to correct to avoid improper holes that are too deep, deviated, and cannot be reversed. But in most cases, cutting will also produce a lot of chips and blood splashes that affect the line of sight. The dilemma is that the extended operation time due to cautious operation will seriously affect the safety and comfort of the patient.

[0004] At present, some advanced people have designed to install an additional tool relay sleeve between the tool and the mobile phone. The outer side and the inner side of the tool relay sleeve can be rotatably combined. The mobile phone is assembled on the upper side of the tool relay sleeve, and the tool is assembled on the lower side of the inner side, and there is another handle that bites the outer side of the tool relay sleeve. When the operator starts the tool and holds the handle with one hand, the outer side of the tool relay sleeve does not rotate, and the lower side of the non-rotating outer side forms an obstacle to the downward movement of the mobile phone, which can limit the cutting depth of the tool. However, some disadvantages of the conventional technology are that its components increase the volume or height to a considerable extent, which is not easy to operate in the limited oral space, especially for drilling holes in the back molars. Then, the connection between the rotating part and the positioning part of the conventional technology will inevitably produce a certain degree of operational wear. In fact, the structure of the conventional technology is complex and precise, resulting in extremely high product manufacturing costs.

[0005] Therefore, there is an urgent need in the art for a dental implant drilling solution to solve the above problems. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a machine head limiting guide cylindrical structure, a dental implant limiting tool group and a dental implant guide limiting tool group, which have a simple structure and are easy to operate, can effectively overcome the defects of the prior art, and are beneficial to limiting the maximum cutting depth of the drilling hole during dental implantation. The handheld machine and the tool are not easy to deflect and shake, and the machine head limiting guide cylindrical structure does not occupy the operating space.

[0007] To achieve the above-mentioned purpose, the present invention discloses a head limit guide cylindrical structure for limiting the drilling depth of a handheld tool. The handheld tool includes a head, and is characterized in that the head limit guide cylindrical structure includes:

[0008] A C-shaped plate having an inner concave notch and a first side and a second side opposite to each other;

[0009] A machine head adapting structure is disposed on the first side and has a first lateral opening connected to the inner concave notch, and a machine head accommodating space is provided in the machine head adapting structure; and

[0010] A C-shaped tube structure is arranged on the second side and has a second lateral opening connected to the inner concave notch. The outer diameter of the C-shaped tube structure is smaller than the outer diameter of the C-shaped plate.

[0011] Among them, the appearance of the head adapter structure is a round straight cylinder extending outward from the first side of the C-shaped plate, and the appearance of the C-shaped tube structure is a round straight cylinder extending outward from the second side of the C-shaped plate.

[0012] Among them, the C-shaped plate has a central through hole and a virtual vertical axis, the central through hole is connected to the concave notch, the virtual vertical axis passes through the central through hole, and the C-shaped tube structure and the head adapter structure are respectively parallel to the virtual vertical axis.

[0013] The cross section of the head adapter structure forms a first arc, and two ends of the first arc extend to a first angle with the virtual vertical axis as the center, and the first angle is between 160 degrees and 210 degrees.

[0014] The cross section of the C-shaped tube structure forms a second arc, and two ends of the second arc extend to a second angle with the virtual vertical axis as the center, and the second angle is at least 220 degrees.

[0015] Among them, the inner diameter of the head adapter structure is greater than the aperture length of the central through hole.

[0016] The C-shaped plate, the machine head adapting structure, and the C-shaped tube structure are integrally formed metal structures and are manufactured by three-dimensional printing.

[0017] The head accommodating space corresponds to the appearance of the head, so that the head can be detachably combined with the head adapting structure, and the first side of the C-shaped plate is used for the head to abut.

[0018] Also disclosed is a dental implant limiting tool set, which is characterized by comprising:

[0019] A handheld implement including a handpiece; and

[0020] A plurality of machine head position limiting guide cylindrical structures can be respectively sleeved outside the machine head, and each of the machine head position limiting guide cylindrical structures further comprises:

[0021] A C-shaped plate having an inner concave notch and a first side and a second side opposite to each other;

[0022] A machine head adapting structure is disposed on the first side and has a first lateral opening connected to the inner concave notch, and a machine head accommodating space is provided in the machine head adapting structure; and

[0023] A C-shaped tube structure is arranged on the second side and has a second lateral opening connected to the inner concave notch. The outer diameter of the C-shaped tube structure is smaller than the outer diameter of the C-shaped plate.

[0024] Also disclosed is a dental implant guide and limit tool set, which is used in conjunction with a handheld device and is characterized in that it includes:

[0025] A plurality of handpiece position limiting guide cylindrical structures can be respectively mounted on the outside of a handpiece of the handheld device, and each of the handpiece position limiting guide cylindrical structures further comprises:

[0026] A C-shaped plate having an inner concave notch and a first side and a second side opposite to each other;

[0027] A machine head adapting structure is disposed on the first side and has a first lateral opening connected to the inner concave notch, and a machine head accommodating space is provided in the machine head adapting structure; and

[0028] a C-shaped tube structure, arranged on the second side, and having a second lateral opening connected to the inner concave notch, the outer diameter of the C-shaped tube structure being smaller than the outer diameter of the C-shaped plate; and a dental implant guide sleeve, guiding the handpiece limit guide cylindrical structure to move axially, further comprising:

[0029] A top opening is located at one end of the implant guide sleeve;

[0030] a third lateral opening extending from the top opening toward the other end of the implant guide sleeve;

[0031] A first axial guide hole, communicating with the top opening and the third lateral opening, and cooperating with the head adapting structure of the head limiting guide cylindrical structure; and

[0032] A second axial guide hole is connected to the first axial guide hole and cooperates with the C-shaped tube structure of the machine head limit guide cylindrical structure, and the aperture length of the second axial guide hole is smaller than the aperture length of the first axial guide hole.

[0033] Through the above structure, the head limit guide cylindrical structure of the present invention is simple in structure and low in manufacturing cost; it is small in size and does not require additional operating space; during operation, the head limit guide cylindrical structure does not directly contact the tool, and there is no problem of operational wear. The head limit guide cylindrical structure of the present invention is also conducive to intuitively stopping at the appropriate depth when drilling, and the head limit guide cylindrical structure of different specifications can be easily replaced to shorten the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1A It is an exploded view of a machine head position limiting guide cylindrical structure according to a specific embodiment of the present invention;

[0035] Figure 1B Based on Figure 1A A side view of the nose limit guide cylindrical structure of a specific embodiment;

[0036] Figure 1C Based on Figure 1A A top view of the head limit guide cylindrical structure of a specific embodiment;

[0037] Figure 1D Based on Figure 1A A bottom view of the machine head limit guide cylindrical structure of a specific embodiment;

[0038] Figure 2 for Figure 1A A schematic diagram of a handheld tool combined with a head limiting guide cylindrical structure;

[0039] Figure 3A A perspective view of a machine head position limiting guide cylindrical structure according to a specific embodiment of the present invention;

[0040] Figure 3B It is a perspective view of a machine head position limiting guide cylindrical structure according to multiple specific embodiments of the present invention;

[0041] Figure 3C For use Figure 3B Schematic diagram of the machine head limit guide cylindrical structure 1R cooperating with the handheld tool for drilling;

[0042] Figure 3D For use Figure 3B Schematic diagram of the machine head limit guide cylindrical structure 1P cooperating with the handheld tool for drilling;

[0043] Figure 4A Based on Figure 1AA schematic diagram of a first arc angle of the machine head limit guide cylindrical structure;

[0044] Figure 4B Based on Figure 1A A schematic diagram of a second arc angle of the machine head limit guide cylindrical structure;

[0045] Figure 5 is a schematic diagram of a dental implant limiting tool set according to a specific embodiment of the present invention;

[0046] Figure 6 Schematic diagram of a dental implant guiding and limiting tool set according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the advantages, spirit and features of the present invention easier and more clearly understood, the following will be described and discussed in detail with reference to the accompanying drawings and embodiments. It is worth noting that these embodiments are only representative embodiments of the present invention. However, they can be implemented in many different forms and are not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0048] The terms used in the various embodiments disclosed in the present invention are only used for the purpose of describing specific embodiments, and are not intended to limit the various embodiments disclosed in the present invention. The singular form used herein also includes multiple forms, unless the context clearly indicates otherwise. Unless otherwise specified, all terms (including technical terms and scientific terms) used in this specification have the same meanings as those commonly understood by ordinary technicians in the field to which the various embodiments disclosed in the present invention belong. The above terms (such as terms defined in generally used dictionaries) will be interpreted as having the same meaning as the contextual meaning in the same technical field, and will not be interpreted as having idealized meanings or overly formal meanings, unless clearly defined in the various embodiments disclosed in the present invention.

[0049] See also Figures 1A to 1D and Figure 2 . Figures 1A to 1D It is an exploded view, a side view, a top view, and a bottom view of a machine head limiting guide cylindrical structure 1 according to a specific embodiment of the present invention. Figure 2 for Figure 1ASchematic diagram of a handheld tool combined with a handpiece position limiting guide cylindrical structure. The handpiece position limiting guide cylindrical structure 1 of the present invention is used to be installed on a handheld tool 2 and limit the drilling depth of the handheld tool 2. The handheld tool 2 includes a handpiece 20 to connect a tool 3. The handpiece position limiting guide cylindrical structure 1 includes a C-shaped plate 10, a handpiece adapter structure 12 and a C-shaped tube structure 14. The C-shaped plate 10 has an inner concave notch 100 and a first side 101 and a second side 102 opposite to each other. The handpiece adapter structure 12 is arranged on the first side 101, and has a first lateral opening 120 connected to the inner concave notch 100. There is a handpiece accommodating space in the handpiece adapter structure 12. The C-shaped tube structure 14 is arranged on the second side 102, and has a second lateral opening 140 connected to the inner concave notch 100. The inner diameter D2 of the handpiece adapter structure 12 is greater than the diameter D1 of the central through hole 105, so that the first side 101 of the C-shaped plate 10 can be abutted against the handpiece 20 when the handpiece limit guide cylindrical structure 1 is assembled on the handpiece 2. The outer diameter D4 of the C-shaped tube structure 14 is less than the outer diameter D0 of the C-shaped plate 10, so that the C-shaped tube structure 14 can penetrate into the inter-tooth space for drilling.

[0050] The handheld device 2 may be a handpiece commonly used in dental surgery, and is used to install a tool 3. The tool 3 is a dental tool, or a dental drill, that can be installed on the handheld device 2. The C-type plate 10 is not limited to a plate type; between the head adapter structure 12 and the C-type tube structure 14, any structure that can provide the same function can be regarded as a type of the C-type plate 10.

[0051] The appearance of the machine head adapter structure 12 is a round straight cylinder extending outward from the first side 101 of the C-shaped plate 10, and there is a machine head accommodating space inside to accommodate and fix the machine head 20. The round straight cylinder mentioned here means that its appearance is relatively non-angular, roughly circular, and at least one of the two ends has an opening. The inner shape of the machine head adapter structure 12 corresponds to the structure of the machine head 20, and the structure can elastically bite the machine head 20. The appearance of the C-type tube structure 14 is a round straight cylinder extending outward from the second side 102 of the C-shaped plate 10. Even, the C-type tube structure 14 can be designed to be non-circular, such as elliptical, polygonal, concave, etc., to meet the gap between the teeth.

[0052] The machine head position limiting guide cylindrical structure 1 of the present invention has a simple structure and low manufacturing cost. Moreover, the volume of the machine head position limiting guide cylindrical structure 1 after being installed on the handheld tool 2 is almost equal to the original volume of the handheld tool 2, so the machine head position limiting guide cylindrical structure 1 does not occupy the operating space. Since the machine head position limiting guide cylindrical structure 1 of the present invention is fixed on the machine head 20, rather than being installed between the machine head and the tool as in the conventional technology, it will not extend the tool length and is not limited by the opening amplitude or drilling position. Furthermore, the machine head position limiting guide cylindrical structure 1 does not directly contact the tool 3, and the machine head position limiting guide cylindrical structure 1 does not require a rotating element and will not wear during operation. The machine head position limiting guide cylindrical structure 1 is fixed to the machine head 20 by a structure, and can be disassembled and assembled by simply applying force, which is convenient and quick to replace. Furthermore, the machine head limit guide cylindrical structure 1 and the tool 3 are highly independent, and the machine head limit guide cylindrical structure 1 does not need to be disassembled before replacing the tool 3; conversely, the machine head limit guide cylindrical structure 1 does not need to be disassembled before replacing the tool 3. Finally, since there is a water spraying port on the handheld tool 2 to spray water toward the tool, the side opening design allows water to be sprayed to the drilling position to smoothly cool the operating temperature and remove blood and debris.

[0053] In a specific embodiment, the C-shaped plate 10 , the machine head adapting structure 12 and the C-shaped tube structure 14 are three components, which are assembled, joined, clamped or welded to form the machine head limiting guide cylindrical structure 1 .

[0054] In another specific embodiment, the C-shaped plate 10, the head adapter structure 12 and the C-shaped tube structure 14 are integrally formed metal structures, and are additively manufactured by three-dimensional metal printing. The integrally formed metal structure can enhance the structural stability and elastic toughness of the head limit guide cylindrical structure 1, facilitates installation on the handheld tool 2, and is not easy to disintegrate during high-torque drilling operations. Additive manufacturing is more suitable for the special and small head limit guide cylindrical structure of the present invention than subtractive manufacturing. The head accommodating space corresponds to the appearance of the head 20, so that the head 20 can be detachably combined with the head adapter structure 12. One end of the head adapter structure 12 is connected to the C-shaped plate 10, and the other end can be a full opening, a tapered opening or no opening, but both can form a head accommodating space.

[0055] See also FIG. 3A to FIG. 3D . Figure 3A and Figure 3B 1 is a perspective view of the handpiece limit guide cylindrical structure according to multiple specific embodiments of the present invention. A tool accommodating space 145 is provided in the C-shaped tube structure 14 for the tool 3 to pass through. The other end of the C-shaped tube structure 14 is a tool passing port 141, so that the tool 3 can pass through the tool recess 100, the tool accommodating space 145 and the tool passing port 141. In other words, when the handheld tool 2 is equipped with the tool 3 and is in operation, the tool 3 is not in direct contact with the C-shaped tube structure 14.

[0056] like Figure 3A and Figure 3B As shown, the operator can determine the length of the tool 3 exposed from the tool outlet 141 of the C-type tube structure 14 by replacing the head limiting guide cylindrical structures 1P, 1Q, 1R, 1S of C-type tube structures of different lengths (for example, C-type tube structures 14P, 14Q, 14R, 14S), thereby determining the drilling depth. Figure 3C and Figure 3D For use Figure 3B Schematic diagram of drilling holes in the machine head limit guide cylindrical structure 1R and the machine head limit guide cylindrical structure 1P. Figure 3C and Figure 3D As shown, the handpiece limit guide cylindrical structure 1 is fixed on the handpiece 20. When the handheld tool 2 equipped with the handpiece limit guide cylindrical structure 1 is working on a working plane (dental bed), the C-shaped tube structure 14 presses against the working plane and limits the movement of the handpiece 20 to the working plane. Relatively speaking, the tool 3 driven by the handpiece 20 cannot drill deeper. Therefore, the C-shaped tube structure 14 limits the drilling depth.

[0057] As mentioned above, the drilling depth can be determined by selecting a handpiece position-limiting guide cylindrical structure with a C-shaped tube structure of different lengths. For example, when the operator wants to use the tool 3 to drill a shallow hole in the alveolar bone 4, the handpiece position-limiting guide cylindrical structure 1R with a longer C-shaped tube structure 14R can be selected and installed on the handheld tool 2. At this time, the part of the tool 3 exposed from the C-shaped tube structure 14R is less, so the drilling hole is shallower. When the operator wants to further use the same tool 3 to drill a deeper hole in the alveolar bone 4, the handpiece position-limiting guide cylindrical structure 1P with a shorter C-shaped tube structure 14P can be selected and replaced with the handheld tool 2. At this time, the part of the tool 3 exposed from the C-shaped tube structure 14P is more, so the drilling hole is deeper.

[0058] According to the present invention, after the operator selects the drilling depth, he replaces the relative length of the head limit guide cylindrical structure 1, and after determining the drilling position angle, he can intuitively drill deep. When the preset drilling depth is reached, the operator can feel that the handheld tool 2 is blocked and stops, without the need to continuously and repeatedly estimate the drilling depth visually.

[0059] Since the handle 30 of the tool 3 is usually small in diameter, the diameter of the tool recess 100 can be narrower, so that the first side 101 of the C-shaped plate 10 has a larger area to fix the head 20. Since the tip 31 of the tool 3 is usually large in diameter, and to prevent the C-shaped tube structure 14 from contacting the tip 31 and causing wear, the diameter of the tool accommodating space 145 and the tool through-hole 141 needs to be wider to prevent debris from accumulating in the tool accommodating space 145 during drilling.

[0060] In addition, a protruding tenon 127 may be provided at the top or side of the handpiece adapting structure 120 to hold the handpiece 20 and prevent the handpiece limiting guiding cylindrical structure 1 from slipping off.

[0061] Please also read Figure 1A , Figure 1B , Figure 1C , Figure 4A and Figure 4B . Figure 4A and Figure 4B Based on Figure 1A Schematic diagram of the arc angle of the machine head limit guide cylinder structure. Figure 4A and Figure 4B As shown, the C-shaped plate 10 has a virtual vertical axis Y falling on the central axis of the C-shaped plate 10. The C-shaped tube structure 14 and the head adapter structure 12 each extend parallel to the virtual vertical axis Y. The C-shaped plate 10 has a central through hole 105, and the central through hole 105 is connected to the concave notch 100, and the virtual vertical axis Y passes through the central through hole 105. The cross-section of the head adapter structure 12 forms a first arc. The two ends of the first arc extend with the virtual vertical axis Y as the center to form an angle of a first angle A1, and the first angle A1 is between 160 degrees and 210 degrees. Conversely, the first opening angle of the first lateral opening 120 with the virtual vertical axis Y as the center is between 150 degrees and 200 degrees. The opening size of the first lateral opening 120 is conducive to combining and clamping the head 20, and is also convenient for disassembling the head 20 from the head adapter structure 12.

[0062] The cross section of the C-shaped tube structure 14 forms a second arc, and the two ends of the second arc extend with the virtual vertical axis Y as the center to form an angle of a second angle A2, and the second angle A2 is at least 220 degrees and at most 340 degrees. In other words, the second opening angle of the second lateral opening 140 with the virtual vertical axis Y as the center is between 20 degrees and 140 degrees. Figure 2 When the two ends of the second lateral opening 140 are engaged in the manner of FIG. 1 , the second opening angle of the second lateral opening 140 allows the tool to pass through and enter the C-shaped tube structure 14 , and the water column of the water spray hole of the handheld tool can also flush to the drilling position.

[0063] See also Figure 5 . Figure 5It is a schematic diagram of a dental implant limiting tool set according to a specific embodiment of the present invention. Another scope of the present invention is to provide a dental implant limiting tool set, which includes a handheld instrument 2 and a plurality of handpiece limiting guide cylindrical structures 1. The handheld instrument 2 includes a handpiece 20 to drive a tool, and the handpiece 20 has a tool mounting side 201. The handpiece limiting guide cylindrical structures 1 can be respectively sleeved on the outside of the handpiece 20, and each handpiece limiting guide cylindrical structure 1 is substantially the same as the handpiece limiting guide cylindrical structure described in the aforementioned embodiment. The handpiece 2 is detachably fixed in the handpiece adapter structure 12, and the tool mounting side 201 abuts against the first side 101.

[0064] In addition, the length of the C-shaped tube structure 14 of each head limit guide cylindrical structure 1 is different, for example, 15mm, 17mm, 19mm, 21mm. The C-shaped tube structures 14 of different lengths are used to drill holes of different depths. For example, the C-shaped tube structures 14 of the above lengths can drill cutting depths of 9mm, 7mm, 5mm, and 3mm respectively.

[0065] See also Figure 2 and Figure 6 . Figure 6 Schematic diagram of a dental implant guide limiting tool set according to a specific embodiment of the present invention. In this specific embodiment, the dental implant guide limiting tool set is used in conjunction with a handheld instrument 2. The dental implant guide limiting tool set includes a plurality of handpiece limiting guide cylindrical structures 1 and a dental implant guide sleeve 5. The handheld instrument 2 and the handpiece limiting guide cylindrical structure 1 have the same means and functions as the previous embodiment, and are not repeated here. The handheld instrument 2, the tool 3 and the single handpiece limiting guide cylindrical structure 1 are pre-assembled, and the dental implant guide sleeve 5 is pre-fixed on the surgical site, and the combined handheld instrument 2 and the single handpiece limiting guide cylindrical structure 1 can slide axially in the dental implant guide sleeve 5. The dental implant guide sleeve 5 further has a top opening 50, a third lateral opening (not shown), a first axial guide hole 51 and a second axial guide hole 52. The top opening 50 is located at one end of the dental implant guide sleeve 5. The third lateral opening extends from the top opening 50 to the other end of the dental implant guide sleeve 5.

[0066] The inner wall of the first axial guide hole 51 matches the appearance of the head adapting structure 12 of the head position limiting guide cylindrical structure 1 , so as to facilitate the axial movement of the head position limiting guide cylindrical structure 1 in the first axial guide hole 51 .

[0067] The implant guide sleeve 5 further includes a tooth mold fixing element 55 to fix the implant guide sleeve 5 on the tooth. A guide sleeve tool through hole 54 is provided at the bottom of the implant guide sleeve 5. The outer diameter of the handpiece limit guide cylindrical structure 1 is slightly smaller than the inner diameter of the first axial guide hole 51, so the handpiece limit guide cylindrical structure 1 can slide up and down in the first axial guide hole 51. Therefore, the tool 3 can pass through the guide sleeve tool through hole 54 to perform alveolar bone cutting.

[0068] In actual application, the operator holds the handheld tool and moves the handpiece together with the handpiece limit guide cylindrical structure 1 from the top opening 50 into the first axial guide hole 51, and then goes down to the second axial guide hole 52. The third lateral opening is used to allow the handheld tool arm 22 connected to the handpiece 20 to pass through. However, in order to allow the handheld tool arm 22 to pass through, the third lateral opening needs a certain expansion angle. The expansion angle of the third lateral opening will make the handpiece 20 together with the handpiece limit guide cylindrical structure 1 easily tilt and shake toward the outside of the third lateral opening, thereby causing the tool 3 to deviate from the original drilling axis.

[0069] In order to prevent the handpiece 20 from tilting toward the outside of the third lateral opening together with the handpiece position limiting guide cylindrical structure 1, the present invention further designs a second axial guide hole 52 with a narrower aperture and a larger covering angle. The second axial guide hole 52 cooperates with the C-type tube structure 14 of the handpiece position limiting guide cylindrical structure 1, and the aperture length of the second axial guide hole 52 is smaller than the aperture length of the first axial guide hole 51. At this time, the inner wall connected to the first axial guide hole 51 and the second axial guide hole 52 has two concave and convex turns. The first axial guide hole 51 and the second axial guide hole 52 can guide the axial movement of the handpiece position limiting guide cylindrical structure 1 in two stages. The second axial guide hole 52 accommodates the C-type tube structure 14, and when the C-type tube structure 14 penetrates into the second axial guide hole 52, the angle at which the second axial guide hole 52 covers the C-type tube structure 14 is greater than the angle at which the first axial guide hole 51 covers the handpiece adapter structure 12. Therefore, since the second axial guide hole 52 covers the C-shaped tube structure 14, the machine head 20 and the tool 3 are less likely to tilt or shake, and the drilling axis can be stabilized.

[0070] In summary, the handpiece position limiting guide cylindrical structure of the present invention is mainly beneficial for the operator to control the cutting depth when drilling. The handpiece position limiting guide cylindrical structure of the present invention is simple and has low manufacturing cost; it is small in size and does not require additional operating space; during operation, the handpiece position limiting guide cylindrical structure does not directly contact the tool, and there is no problem of operational wear. And the handpiece position limiting guide cylindrical structure of different specifications can be easily replaced to shorten the operation time. The dental implant guide sleeve of the present invention can limit the radial movement or tilt of the handpiece position limiting guide cylindrical structure, so that the handheld device can move axially stably.

[0071] The detailed description of the above specific embodiments is intended to more clearly describe the features and spirit of the present invention, rather than to limit the scope of the present invention by the above disclosed specific embodiments. On the contrary, the purpose is to cover various changes and arrangements with equivalents within the scope of the patent scope that the present invention intends to apply for.

Claims

1. A head limit guide cylindrical structure, used to limit the drilling depth of a handheld tool, the handheld tool comprises a head, It is characterized in that The machine head limit guide cylindrical structure includes: A C-shaped plate having an inner concave notch and a first side and a second side opposite to each other, wherein the first side of the C-shaped plate is for the machine head to abut against; A machine head adapting structure is disposed on the first side and has a first lateral opening connected to the inner concave notch. The machine head adapting structure has a machine head accommodating space to accommodate and fix the machine head; and A C-shaped tube structure is disposed on the second side and has a second lateral opening connected to the inner concave notch, and the outer diameter of the C-shaped tube structure is smaller than the outer diameter of the C-shaped plate; The C-shaped plate has a central through hole, the central through hole is connected to the concave notch, and A dental implant guide sleeve guides the axial movement of the handpiece limit guide cylindrical structure, and further has: A top opening is located at one end of the implant guide sleeve; a third lateral opening extending from the top opening toward the other end of the implant guide sleeve; A first axial guide hole, communicating with the top opening and the third lateral opening, and cooperating with the head adapting structure of the head limiting guide cylindrical structure; and A second axial guide hole connected to the first axial guide hole, matched with the C-shaped tube structure of the handpiece limit guide cylindrical structure, and the aperture length of the second axial guide hole is smaller than the aperture length of the first axial guide hole; The inner wall connected to the first axial guide hole and the second axial guide hole has two concave and convex turns to guide the axial movement of the machine head limiting guide cylindrical structure in two stages. The angle of the second axial guide hole covering the C-tube structure is greater than the angle of the first axial guide hole covering the machine head adapter structure. Because the second axial guide hole covers the C-tube structure, the machine head and the tool are less likely to tilt and shake, and the drilling axis can be stabilized.

2. The head limiting guide cylindrical structure as claimed in claim 1, It is characterized in that The shape of the head adapter structure is a round straight cylinder extending outward from the first side of the C-shaped plate, and the shape of the C-shaped tube structure is a round straight cylinder extending outward from the second side of the C-shaped plate.

3. The machine head limiting guide cylindrical structure as claimed in claim 1, It is characterized in that The C-shaped plate has a virtual vertical axis, which passes through the central through hole. The C-shaped tube structure and the head adapter structure are respectively parallel to the virtual vertical axis.

4. The head limiting guide cylindrical structure as claimed in claim 3, It is characterized in that The cross section of the head adapting structure forms a first arc, and two ends of the first arc extend to a first angle with the virtual vertical axis as the center, and the first angle is between 160 degrees and 210 degrees.

5. The machine head limiting guide cylindrical structure as claimed in claim 3, It is characterized in that The cross section of the C-shaped tube structure forms a second arc, and two ends of the second arc extend to a second angle with the virtual vertical axis as the center, and the second angle is at least 220 degrees.

6. The head limiting guide cylindrical structure as claimed in claim 3, It is characterized in that The inner diameter of the machine head adapting structure is longer than the aperture length of the central through hole.

7. The machine head limiting guide cylindrical structure as claimed in claim 1, It is characterized in that The C-shaped plate, the machine head adapting structure, and the C-shaped tube structure are integrally formed metal structures and are manufactured by three-dimensional printing.

8. The machine head limiting guide cylindrical structure as claimed in claim 1, It is characterized in that The head accommodating space corresponds to the appearance of the head, so that the head can be detachably combined with the head adapting structure, and the first side of the C-shaped plate is used for the head to abut.

9. A dental implant limiting tool set, It is characterized in that Contains: A handheld implement including a handpiece; and A plurality of machine head position limiting guide cylindrical structures can be respectively sleeved outside the machine head, and each of the machine head position limiting guide cylindrical structures further comprises: A C-shaped plate having an inner concave notch and a first side and a second side opposite to each other, wherein the first side of the C-shaped plate is for the machine head to abut against; A machine head adapting structure is disposed on the first side and has a first lateral opening connected to the inner concave notch. The machine head adapting structure has a machine head accommodating space to accommodate and fix the machine head; and A C-shaped tube structure is disposed on the second side and has a second lateral opening connected to the inner concave notch, and the outer diameter of the C-shaped tube structure is smaller than the outer diameter of the C-shaped plate; The C-shaped plate has a central through hole, the central through hole is connected to the concave notch, and A dental implant guide sleeve guides the axial movement of the handpiece limit guide cylindrical structure, and further has: A top opening is located at one end of the implant guide sleeve; a third lateral opening extending from the top opening toward the other end of the implant guide sleeve; A first axial guide hole, communicating with the top opening and the third lateral opening, and cooperating with the head adapting structure of the head limiting guide cylindrical structure; and A second axial guide hole connected to the first axial guide hole, matched with the C-shaped tube structure of the handpiece limit guide cylindrical structure, and the aperture length of the second axial guide hole is smaller than the aperture length of the first axial guide hole; The inner wall connected to the first axial guide hole and the second axial guide hole has two concave and convex turns to guide the axial movement of the machine head limiting guide cylindrical structure in two stages. The angle of the second axial guide hole covering the C-tube structure is greater than the angle of the first axial guide hole covering the machine head adapter structure. Because the second axial guide hole covers the C-tube structure, the machine head and the tool are less likely to tilt and shake, and the drilling axis can be stabilized.

10. A dental implant guide and limit tool set, used in conjunction with a handheld instrument. It is characterized in that Contains: A plurality of handpiece position limiting guide cylindrical structures can be respectively mounted on the outside of a handpiece of the handheld device, and each of the handpiece position limiting guide cylindrical structures further comprises: A C-shaped plate having an inner concave notch and a first side and a second side opposite to each other, wherein the first side of the C-shaped plate is for the machine head to abut against; A machine head adapting structure is disposed on the first side and has a first lateral opening connected to the inner concave notch. The machine head adapting structure has a machine head accommodating space to accommodate and fix the machine head; and A C-shaped tube structure is disposed on the second side and has a second lateral opening connected to the inner concave notch, and the outer diameter of the C-shaped tube structure is smaller than the outer diameter of the C-shaped plate; The C-shaped plate has a central through hole, and the central through hole is connected to the concave notch; and A dental implant guide sleeve guides the axial movement of the handpiece limit guide cylindrical structure, and further has: A top opening is located at one end of the implant guide sleeve; a third lateral opening extending from the top opening toward the other end of the implant guide sleeve; A first axial guide hole, communicating with the top opening and the third lateral opening, and cooperating with the head adapting structure of the head limiting guide cylindrical structure; and A second axial guide hole connected to the first axial guide hole, matched with the C-shaped tube structure of the handpiece limit guide cylindrical structure, and the aperture length of the second axial guide hole is smaller than the aperture length of the first axial guide hole; The inner wall connected to the first axial guide hole and the second axial guide hole has two concave and convex turns to guide the axial movement of the machine head limiting guide cylindrical structure in two stages. The angle of the second axial guide hole covering the C-tube structure is greater than the angle of the first axial guide hole covering the machine head adapter structure. Because the second axial guide hole covers the C-tube structure, the machine head and the tool are less likely to tilt and shake, and the drilling axis can be stabilized.

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