JPS646917U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a partially omitted longitudinal sectional front view of a handpiece embodying the present invention, FIG. 2 is an enlarged longitudinal sectional view of the handpiece, and FIG. 3 is a sectional view taken along the line -- in FIG. In the figure, A: handpiece, A': handpiece body, _a1 : air motor, 1a: air supply section, 1b
: Exhaust part, 2: Supply/exhaust hose, 2a: Inner pipe, 2b
: Outer pipe, 2a': Air supply path, 2b': Exhaust path, 3:
Silence pipe, 3a: bellows part, 5: first exhaust port, 6: second exhaust port, 7: noise filter.

Claims (1)

[Scope of utility model registration request] In a handpiece that uses an air motor as a drive source, an air supply part and an exhaust part of the air motor are provided at the rear end of the handpiece body, and a double-structured supply and exhaust hose is connected to the rear end of the handpiece body. Connecting the air part with the air supply path in the inner pipe of the supply and exhaust hose, and loosely fitting a silencer pipe around the outer periphery of the connection part of the supply and exhaust hose, and fitting one end of the pipe to the rear end of the handpiece body,
The exhaust section is connected to one end of the silencer pipe by branching to an exhaust path between the inner and outer pipes of the supply/exhaust hose, and the middle part of the above-mentioned silencer pipe is formed into a bellows shape, and a first end is formed at the other end of the pipe.
A structure in which an exhaust port is provided, an exhaust path is opened at the base end of the supply/exhaust hose to form a second exhaust port, and a sound deadening filter made of a porous material is attached to the exhaust port.