A high-speed mobile phone movement mandrel assembly with reverse chuck

Abstract

The invention provides a mandrel assembly of a handpiece core of a high-speed dental handpiece provided with a clamping head in a reverse direction. The mandrel assembly comprises a mandrel; the clamping head is glidingly arranged in a hollow cavity, and is of an integral hollow cavity structure consisting of a clamping head ring and a plurality of claw-shaped bodies; one end of each claw-shaped body is fixed to the clamping head ring; the other end of each claw-shaped body extends in the axial direction of the hollow cavity; the plurality of the claw-shaped bodies are fixedly arranged at the clamping head ring at intervals so as to form a hollow part for accommodating a dental bar in a surrounding way; the extending front ends of the claw-shaped bodies are provided with sliding conical surfaces; the sliding conical surfaces of the claw-shaped bodies jointly form a conical surface which is in adaptive fit with an installing conical surface; and the two side walls of the claw-shaped bodies are limited in a concave part, so that the radial deviation of the clamping head in the hollow cavity is prevented. Compared with the prior art, the mandrel assembly using such a connecting mode, has the advantages that the contact area of the clamping head and a pressing element is increased as much as possible; the positions of the clamping head and the pressing element is limited; the continuous and stable contact is realized; the clamping and the replacement of the dental needle are convenient; and the stability during the clamping is high.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a high-speed mobile phone core shaft assembly with a reverse chuck. Background technique [0002] Dental handpieces are one of the necessary equipment for oral medicine, and they are used in more and more fields. In addition to stomatology, they are also used in internal medicine, orthopedics, and cosmetic and plastic surgery. The structure of the dental handpiece includes a handle and a handpiece connected to the handle. The handpiece includes a rotating shaft with a needle holding device, a wind wheel sleeved on the rotating shaft, and bearings symmetrically arranged on both sides of the wind wheel. The needle holding device is used to hold The working rod drives the working rod to rotate when the rotating shaft rotates to grind the teeth. Therefore, the needle clamping device must be able to clamp the working rod firmly, and the working rod cannot be allowed to fall off, othe...

AI Technical Summary

Problems solved by technology

Therefore, the clamping device must be able to firmly hold the working rod, so that the working rod cannot fall off, otherwise it will cause a threat to the patient and the doctor

In the existing dental handpiece, the opening of the needle clamping device is relatively large. If the opening of the needle clamping device is relatively large, there is a danger that the working rod may fall off easily; if the opening of the needle clamping device is small, the working rod is difficult to pass through and cannot clamping work stick

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