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CN-121971188-A - Dental handpiece for treating upper front teeth

CN121971188ACN 121971188 ACN121971188 ACN 121971188ACN-121971188-A

Abstract

The invention discloses a dental handpiece for treating upper front teeth, which comprises a machine body, a machine head, a machine needle and a transmission mechanism. The machine head comprises a machine head shell, a clamping device and a rotary unlocking machine matched with the clamping device, and the clamping device is connected with the output end of the transmission mechanism. The rotary unlocking mechanism is provided with a rotary sleeve which is arranged outside the machine head in a rotary mode, the rotary unlocking mechanism is in linkage with the clamping device, and the needle can be locked or released through rotating the rotary sleeve. The dental handpiece has the advantages of being modularized, convenient to process and maintain, enabling the whole dental handpiece to be in line with human engineering, enabling the dental handpiece to be held stably and comfortably for treatment, enabling the clamping device and the rotary unlocking mechanism to be novel and unique in structure, enabling the needle to be convenient and rapid to disassemble and assemble, enabling the clamping device to be capable of effectively and stably clamping and positioning the needle, meeting the high torque output requirement of the dental handpiece, enabling the output torsion force to be high, and improving drilling capacity of the dental handpiece.

Inventors

  • SHU HUI
  • ZENG XIAOLIN
  • YUAN BIN
  • ZHANG LIANG

Assignees

  • 广东丹特尔医疗科技有限公司

Dates

Publication Date
20260505
Application Date
20260402

Claims (10)

  1. 1. A dental handpiece for treating upper front teeth, comprising a body (1), a handpiece (2), a needle (3) and a transmission mechanism (4), and being characterized in that: The machine head (2) comprises a machine head shell (21), a clamping device (7) for clamping the needle (3) and a rotary unlocking mechanism (6) matched with the clamping device, wherein the clamping device (7) is rotatably arranged in the machine head shell (21), the clamping device (7) is connected with the output end of the transmission mechanism (4), and the input end of the transmission mechanism (4) is connected with an external driving source; The rotary unlocking mechanism (6) is provided with a rotary sleeve (61) which is rotatably arranged outside the machine head (2), the rotary unlocking mechanism (6) is linked with the clamping device (7), and the needle (3) can be locked or released by rotating the rotary sleeve (61).
  2. 2. Dental handpiece according to claim 1, characterized in that the rotary unlocking mechanism (6) is further provided with a driving ball (62), a driving ring (63), a connecting ring (64), a first elastic member (65), a second elastic member (66) and a push rod (67), the inner wall of the swivel (61) is provided with a driving groove (611), the handpiece housing (21) is provided with a connecting sleeve (22), and the connecting sleeve (22) is provided with an inclined guide groove (221); A rotating shaft (5) is arranged in the machine head shell (21), one end of the rotating shaft (5) is connected with the output end of the transmission mechanism (4), the other end of the rotating shaft is connected with the clamping device (7), the rotating shaft (5) is sleeved with the connecting sleeve (22), the first elastic piece (65), the driving ring (63), the connecting ring (64) and the second elastic piece (66) are sequentially sleeved with the rotating shaft (5), the second elastic piece (66) is close to the needle (3), the driving ring (63) and the connecting ring (64) can slide along the axial direction of the rotating shaft (5), the driving ring (63) is provided with a containing groove (631), the driving ball (62) is arranged in the guide groove (221) and is positioned between the rotating sleeve (61) and the driving ring (63), one side of the driving ball (62) stretches into the driving groove (611), and the other side of the driving ball stretches into the containing groove (631); The push rod (67) is sleeved in the rotating shaft (5), the push rod (67) can slide along the axial direction of the rotating shaft (5), the connecting ring (64) is connected with the push rod (67), and one end of the push rod (67) is close to the clamping device (7).
  3. 3. Dental handpiece according to claim 2, characterized in that the clamping means (7) comprises a sleeve (71) and a clamping member (72), the sleeve (71) is rotatably mounted in the handpiece housing (21), the sleeve (71) is connected with the spindle (5), the clamping member (72) is sleeved on the sleeve (71), at least two elastic clamping strips (721) are arranged on the clamping member (72), an inclined outwards extending matching edge (722) is arranged on the elastic clamping strips (721), the matching edges (722) on all the elastic clamping strips (721) form a matching position (723), the matching position (723) is of an outer large and inner narrow structure, one end of the push rod (67) is provided with a conical part (671), and the conical part (671) corresponds to the matching position (723); The inner wall of the elastic clamping strip (721) is provided with a clamping block (724) extending inwards, the clamping block (724) is provided with an inner side surface (7241) and an outer side surface (7242), the outer side surface (7242) is close to the matching edge (722), and the inner side surface (7241) extends in the direction inclined to the matching position (723); a jack (711) is arranged at one end of the sleeve (71), a first positioning surface (712) is arranged at the jack (711) of the sleeve (71), an elastic clamping strip (721) of the clamping piece (72) is inserted into the jack (711), and one end of the matching edge (722) extends out from one end of the sleeve (71); One end of car needle (3) is equipped with conical surface (32), be equipped with draw-in groove (31) on car needle (3), draw-in groove (31) are close to conical surface (32), on car needle (3) draw-in groove (31) department is equipped with second locating surface (33), car needle (3) install in when clamping device (7), fixture block (724) with draw-in groove (31) cooperation, first locating plane with second locating surface (33) cooperation.
  4. 4. A dental handpiece according to claim 3, characterized in that the holder (72) is provided with a second sleeve hole (725) through which the needle (3) passes, the second sleeve hole (725) being through in the longitudinal direction of the holder (72), one end of the holder (72) is provided with two symmetrically arranged elastic clamping strips (721), one end of the elastic clamping strip (721) is provided with an inclined outwardly extending mating edge (722), and the two mating edges (722) are arranged in an "eight" shape.
  5. 5. A dental handpiece according to claim 3, wherein a first fitting hole (54) is formed in one end of the rotation shaft (5), the push rod (67) is fitted in the first fitting hole (54), the push rod (67) is in clearance fit with the first fitting hole (54), one end of the rotation shaft (5) is in threaded connection with the sleeve (71), and the fitting position (723) extends into the first fitting hole (54) and corresponds to the tapered portion (671) of the push rod (67).
  6. 6. A dental handpiece according to claim 3, wherein the socket (711) on the sleeve (71) is provided with an arc surface (713), the arc surface (713) corresponds to the first positioning surface (712), two sides of the socket (711) on the sleeve (71) are respectively provided with a yielding part (714), one end of the sleeve (71) is provided with a clamping part (715), the clamping piece (72) is provided with a clamping part (726), and the clamping part (726) is matched with the clamping part (715).
  7. 7. Dental handpiece according to claim 2, characterized in that the push rod (67) is provided with a connecting pin (672), the spindle (5) is provided with a relief groove (55), the connecting pin (672) passes through the relief groove (55) to be matched with the connecting ring (64), and the connecting pin (672) can slide along the relief groove (55).
  8. 8. Dental handpiece according to claim 2, characterized in that the first elastic member (65) and the second elastic member (66) are a first spring and a second spring, respectively, a first bearing (53) is arranged in the connecting sleeve (22), the rotating shaft (5) is sleeved on the first bearing (53), the first spring is positioned between the driving ring (63) and the first bearing (53), a protruding portion (51) is arranged on the rotating shaft (5), and the second spring is positioned between the protruding portion (51) and the connecting ring (64).
  9. 9. Dental handpiece according to claim 2, characterized in that the dental handpiece has a "shape", the body (1) comprises a body shell (11), a neck shell (12) is arranged at one end of the body shell (11), and the head shell (21), the connecting sleeve (21), the neck shell (12) and the body shell (11) are detachably connected together in sequence to form a modular structure.
  10. 10. Dental handpiece according to claim 9, characterized in that one end of the connecting sleeve (22) is screwed with one end of the handpiece shell (21) and the other end is screwed with one end of the handpiece shell (12), the other end of the handpiece shell (12) is screwed with the handpiece shell (11), the swivel (61) being rotatably sleeved on the connecting sleeve (22); the center line of the needle (3), the center line of the machine head shell (21) and the center line of the machine neck shell (12) are overlapped, and an included angle between the center line of the machine neck shell (12) and the center line of the machine body shell (11) is 162 degrees.

Description

Dental handpiece for treating upper front teeth Technical Field The invention belongs to the technical field of dental medical appliances, and relates to a dental handpiece special for treating upper front teeth. Background The upper anterior teeth (including the central incisors and the lateral incisors) of a person are located in front of the oral maxilla and play a key role in smiling, sounding, and maintaining facial morphology. Because of the special position (behind the lips and opposite to the lower front teeth), the dental handpiece has high requirements on the convenience and visibility of operation during treatment. At present, most of dental handpieces commonly used in clinic are bending machines with a certain angle, the included angle between the handpiece and the handle is usually designed to be 90 degrees or other general angles, and the dental handpieces are mainly used for facilitating the treatment of rear molar teeth. For example, chinese patent No. CN2024211610791 discloses a dental handpiece which uses an integrated handpiece and a layout in which the handpiece makes an angle of 90 ° with the handpiece. When using such general dental handpiece to treat upper front teeth, doctors often need to hold and apply force in uncomfortable postures, and at the same time, the handpiece parts easily obstruct the line of sight, so that the treatment operation is inconvenient and laborious, and the treatment area is difficult to accurately observe and treat, and finally the treatment effect of the upper front teeth is affected. In addition, existing dental hand pieces often employ push-type clamping devices to clamp and unclamp the pins. When the clamping mode and the unlocking and unlocking needle mode are applied to the machine head angle and the machine body form which are specially designed for upper front teeth treatment, the problems that the structure is interfered, the unlocking needle is inconvenient or the clamping force is not matched with a novel transmission mechanism are faced. Therefore, it is necessary to design a dental handpiece dedicated to upper anterior teeth treatment to solve the above-mentioned problems of inconvenience in operation, obstructed view, and suitability of the clamping mechanism. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a dental handpiece special for treating upper front teeth. The dental handpiece has the appearance which accords with the human engineering, is convenient for doctors to stably and comfortably hold and clearly observe the upper front tooth treatment area, and simultaneously has the characteristics of novel structure, reliable clamping of the needle and convenient disassembly and assembly of the needle. In order to solve the technical problems, the technical scheme adopted by the invention is that the dental handpiece for treating the upper front teeth comprises a machine body, a machine head, a needle and a transmission mechanism; the machine head comprises a machine head shell, a clamping device for clamping the needle and a rotary unlocking machine matched with the clamping device, wherein the clamping device is rotatably arranged in the machine head shell and is connected with the output end of the transmission mechanism, and the input end of the transmission mechanism is connected with an external driving source; the rotary unlocking mechanism is provided with a rotary sleeve which is arranged outside the machine head in a rotary mode, the rotary unlocking mechanism is in linkage with the clamping device, and the needle can be locked or released through rotating the rotary sleeve. Further, the rotary unlocking mechanism is further provided with a driving ball, a driving ring, a connecting ring, a first elastic piece, a second elastic piece and a push rod, the inner wall of the rotary sleeve is provided with a driving groove, the machine head shell is provided with a connecting sleeve, and the connecting sleeve is provided with an inclined guide groove; A rotating shaft is arranged in the machine head shell, one end of the rotating shaft is connected with the output end of the transmission mechanism, the other end of the rotating shaft is connected with the clamping device, the rotating shaft is sleeved with the connecting sleeve, the first elastic piece, the driving ring, the connecting ring and the second elastic piece are sequentially sleeved with the rotating shaft, the second elastic piece is close to the needle, the driving ring and the connecting ring can both slide along the axial direction of the rotating shaft, the driving ring is provided with a containing groove, the driving ball is arranged in the guide groove and positioned between the rotating sleeve and the driving ring, one side of the driving ball stretches into the driving groove, and the other side of the driving ball stretches into the containing groove; the push rod is sleeved in the rotating shaft, the push rod can sl