JPH0310749Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a device that can be attached to earplugs, especially earphones, to clearly listen to voices and signal sounds emitted from the earphones without being disturbed by surrounding noise. This relates to earplugs used for this purpose.

[Conventional technology]

Some work sites that handle heavy objects, such as steel industries and warehouses, have cranes that are driven by remote control. Operating systems have been developed to operate a crane by transmitting signals to a receiver located on the crane.

This system requires the operator to wear earphones, use the earphones to receive audio signals emitted from the crane, and confirm whether or not the operator's audio signals are being transmitted correctly to the crane.

[Problem that the invention attempts to solve]

Generally, in factory work sites, the noise is so loud that it is often difficult to clearly hear audio signals received by earphones.

The present invention aims to provide earplugs that can solve these problems.

[Means for solving problems]

The present invention will be explained in detail below based on the drawings. 1 indicates an earplug body made of elastic plasticized foam; 2
is a through hole that passes through the earplug body 1 from the center of the rear end surfaces to the center of the tip end surfaces, and is bored without changing the density of the earplug body 1. 3 is the core pipe,
It is removably fitted from the rear end of the through hole 2 to slightly in front of the tip. Reference numeral 4 denotes a connection port provided at the rear end of the core pipe 3, which is shaped so as to be connected to a sound outlet pipe 6 protruding from the main body 5 of the earphone.

[Effect]

With the connection port 4 of the earplug configured as described above connected to the sound outlet pipe 6 of the earphone body 5, the earplug body 1 is inserted into the ear canal while being compressed so that its outer diameter becomes smaller than the hole diameter of the ear canal. do. Then, the earplug body 1 automatically expands due to the elasticity of its material and comes into close contact with the entire inner surface of the ear canal, thereby preventing noise from entering the ear canal.

〔Example〕

The earplug body 1 is made of foamable plastic and is molded into a cylindrical, spherical, or other shape. The through hole 2 is formed by passing a core rod through the center during the molding process of the earplug body 1, and sometimes by removing the core rod after the molding is completed.
After forming, a hole may be made by pressing a punching blade or drill into the center of the shape. The connection port 4 is formed by enlarging the diameter of the rear end of the core pipe 3 and fitting it into the sound outlet pipe 6, and also by providing a threaded groove in the rear end of the core pipe 3 and forming it in the sound outlet pipe 6. The design can be changed as appropriate, such as by screwing into the thread groove.

[Effect of idea]

Since the present invention is constructed as described above, the compressed earplug expands to fit perfectly into anyone's ear canal before being inserted into the ear canal, so it can be used in the steel industry and other noisy places. To enable a person wearing earphones to clearly hear voices and signal sounds emitted from the earphones without being disturbed by surrounding noise. Moreover, the tip of the core pipe is located slightly in front of the tip of the earplug, so when inserting the earplug into the ear canal while compressing it, the tip of the earplug body wraps around the tip of the core pipe. Transformed into
It prevents the tip of the core pipe from hitting the ear canal directly, ensuring safety by preventing damage to the ear canal, and also prevents the ear plug from getting dirty due to use. To provide an earplug having the advantage that the earplug can be easily replaced with a new earplug body by removing the earplug along with the core pipe from the pipe or by removing only the earplug body while the core pipe is connected to the sound outlet pipe. I can do it.

In addition to being used in both ears, the sound-insulating earplugs according to the present invention may also be used in one ear, in which case a conventional general earplug can be worn in the other ear to reduce noise. This can be effective in preventing hearing loss.

[Brief explanation of the drawing]

The drawings are diagrams showing embodiments of the present invention. 1...Earplug body, 2...Through hole, 3...Core pipe, 4...Connection port, 5...Earphone body, 6...
Sound outlet pipe.

Claims (1)

[Scope of utility model registration request] The earplug body made of elastic plasticized foam is provided with a through hole that passes through the earplug body from the center of the rear end face to the center of the tip end face without changing the density of the earplug body, and the earphone is inserted into the through hole. Earplugs that are removably fitted into a core pipe that has a connection port that connects to a sound outlet pipe that protrudes from the main body, characterized in that the core pipe is fitted from the rear end of the earplug body to slightly in front of the tip. and earplugs.