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CN-224206902-U - Protective braking reamer for bone wall punch-through

CN224206902UCN 224206902 UCN224206902 UCN 224206902UCN-224206902-U

Abstract

The utility model discloses a protective braking reamer used when a bone wall passes through, which relates to the technical field of dental reamers and comprises a dental handpiece, wherein a clamping mechanism is arranged at the outer side of the dental handpiece, a braking mechanism is arranged at the bottom of the clamping mechanism, the braking mechanism comprises a braking sleeve connected to the bottom of the clamping mechanism, a first clamping groove is formed in the bottom of the outer side wall of the braking sleeve, a needle shell is rotated at the inner side of the braking sleeve, a second clamping groove is formed in the top of the outer side wall of the needle shell in a penetrating manner, a needle handle is fixed in the middle of the top of the needle shell, a vertical spring is fixed at the top of an inner cavity of the needle shell, and a connecting rod is fixed at the bottom end of the vertical spring.

Inventors

  • ZHANG JIE
  • WANG TIANQI
  • TIAN XU

Assignees

  • 武汉大众口腔医疗股份有限公司

Dates

Publication Date
20260508
Application Date
20250515

Claims (7)

  1. 1. The protective braking reamer for bone wall penetration is characterized by comprising a dental handpiece (100), wherein a clamping mechanism (300) is arranged on the outer side of the dental handpiece (100), and a braking mechanism (200) is arranged at the bottom of the clamping mechanism (300); The brake mechanism (200) is connected to a brake sleeve (210) at the bottom of the clamping mechanism (300), a first clamping groove (211) is formed in the bottom of the outer side wall of the brake sleeve (210), a needle shell (220) is rotated on the inner side of the brake sleeve (210), a second clamping groove (221) is formed in the top of the outer side wall of the needle shell (220) in a penetrating mode, a needle handle (230) is fixed to the middle portion of the top of the needle shell (220), a vertical spring (240) is fixed to the top of an inner cavity of the needle shell (220), a connecting rod (250) is fixed to the bottom end of the vertical spring (240), a needle head (260) is fixed to the bottom end of the connecting rod (250), a shrinkage cavity (270) is formed in one side of the connecting rod (250), a horizontal spring (280) is fixed to one side of the shrinkage cavity (270), and a clamping head (290) is fixed to one end of the horizontal spring (280).
  2. 2. The protective brake reamer as recited in claim 1, wherein the brake mechanism (200) further comprises first tooth slots (222) uniformly formed in the bottom of the needle housing (220), and second tooth slots (261) uniformly formed in the top of the needle (260).
  3. 3. The protective brake reamer of claim 1, wherein the outer side of the needle housing (220) engages the inner side of the brake sleeve (210) and the outer side of the connecting rod (250) engages the inner side of the needle housing (220).
  4. 4. The brake reamer of claim 1, wherein the collet (290) is slidably coupled to the interior of the cavity (270) and the outer sidewall of the collet (290) engages the inner sidewall of the cavity (270).
  5. 5. The protective brake reamer of claim 4, wherein the top of the collet (290) is beveled.
  6. 6. The protective brake reamer as defined in claim 1, wherein the clamping mechanism (300) comprises a connecting plate (310) fixed at the bottom of the outer side of the dental handpiece (100), the bottom of the connecting plate (310) is symmetrically provided with a mounting cavity (320), one side middle part of the mounting cavity (320) is fixedly provided with a connecting spring (330), one end of the connecting spring (330) is fixedly provided with a moving plate (340), one side top of the moving plate (340) is fixedly provided with a pressing rod (350), one side bottom of the moving plate (340) is fixedly provided with a fixing rod (360), the top of the brake sleeve (210) is symmetrically fixedly provided with a connecting block (370), and one side middle part of the connecting block (370) is provided with a fixing hole (380) in a penetrating mode.
  7. 7. The protective brake reamer as defined in claim 6, wherein said push rod (350) extends through the outside of said web (310) and slidably engages said push rod (350) with said web (310), said moving plate (340) being positioned within said mounting cavity (320).

Description

Protective braking reamer for bone wall punch-through Technical Field The utility model relates to the technical field of dental reamers, in particular to a protective braking reamer for bone wall penetration. Background The dental implant has wider application for repairing dentition defect and dentition missing, and the dental implant needs to be prepared with a reamer before being implanted into a jawbone to form a cavity beneficial to implant implantation, and the alveolar bone after tooth deficiency is often accompanied with bone absorption of different degrees, so that the width and the height of the alveolar ridge are reduced, the requirement on the preparation of the implant cavity by using the reamer is very high, important anatomical structures such as lower alveolar nerves, maxillary sinus bottom mucous membrane, mandibular lingual soft tissues and the like are prevented from being damaged, and therefore, the operation of ensuring the reamer in bone tissues is very important. The reamer currently used clinically is controlled to rotate or brake by operators, when the reamer penetrates through the bone tissue to enter an important tissue anatomical structure, the reamer can be judged only by the hand feeling of the operators, the reamer is braked by the reaction of the operators, the hand feeling and the reaction time of the operators are influenced by various factors, when the judgment is wrong or the reaction is delayed, the reamer is continuously rotated to cause irreversible damage, and the life of the operators is endangered, so that the reamer is protected from being braked when the bone wall penetrates through. Disclosure of utility model The utility model aims to provide a protective braking reamer for bone wall penetration, which solves the problem that irreversible damage is easily caused by the fact that when the reamer penetrates through an osseous tissue to enter an important tissue anatomical structure, the reamer can only be judged by the hand feeling of an operator and the reamer is braked by the reaction of the operator. In order to achieve the aim, the utility model provides the technical scheme that the protective braking reamer for bone wall penetration comprises a dental handpiece, wherein a clamping mechanism is arranged on the outer side of the dental handpiece, and a braking mechanism is arranged at the bottom of the clamping mechanism; The brake mechanism comprises a brake sleeve connected to the bottom of the clamping mechanism, a first clamping groove is formed in the bottom of the outer side wall of the brake sleeve, a needle shell is rotated on the inner side of the brake sleeve, a second clamping groove is formed in the top of the outer side wall of the needle shell in a penetrating mode, a needle handle is fixed in the middle of the top of the needle shell, a vertical spring is fixed at the top of an inner cavity of the needle shell, a connecting rod is fixed at the bottom end of the vertical spring, a needle head is fixed at the bottom end of the connecting rod, a shrinkage cavity is formed in one side of the connecting rod, a horizontal spring is fixed on one side of the shrinkage cavity, and a clamping head is fixed at one end of the horizontal spring. Preferably, the braking mechanism further comprises first tooth grooves uniformly formed in the bottom of the needle shell, and second tooth grooves uniformly formed in the top of the needle head. Preferably, the outside of car needle shell with the inside wall laminating of brake housing, the lateral wall of connecting rod with the inside wall laminating of car needle shell, guarantee the connection stability of connecting rod. Preferably, the chuck is slidably connected to the inside of the shrink cavity, and the outer side wall of the chuck is attached to the inner side wall of the shrink cavity, so that the chuck can stably move in the shrink cavity. Preferably, the top of the chuck is provided with an inclined plane, so that the inclined plane of the chuck is conveniently extruded, and the chuck is moved. Preferably, the clamping mechanism comprises a connecting plate fixed at the bottom of the outer side of the dental handpiece, the bottom of the connecting plate is symmetrically provided with a mounting cavity, one side middle part of the mounting cavity is fixedly provided with a connecting spring, one end of the connecting spring is fixedly provided with a movable plate, one side top of the movable plate is fixedly provided with a pressing rod, one side bottom of the movable plate is fixedly provided with a fixing rod, the top of the braking sleeve is symmetrically fixed with a connecting block, and one side middle part of the connecting block is penetrated and provided with a fixing hole. Preferably, the pressing rod penetrates through the outer side of the connecting plate, the pressing rod is connected with the connecting plate in a sliding mode, when the pressing rod is pressed, the pressing rod drives