摘要:
Tool for injection-molding a hearing protection cup which comprises a curved shell (2) with an opening for receiving an ear, and a washer (7) which extends around the opening and is connected to the edge thereof. The washer projects inward across the opening along at least two opposite sides thereof and is intended to support a sealing and comfort ring which is intended to rest against the head. The tool comprises a comon mold cavity intended to produce the shell (2) and the washer (7) in one piece, and an insert which can be introduced into this mold cavity for forming the inner surfaces of the shell and of the washer. The insert is divided into at least three portions (13, 14) by means of dividing planes which extend in the same principal direction as the opposite sides of the opening. The invention also relates to a method for producing a hearing protection cup, and to a hearing protection cup produced using said method.
摘要:
An arrangement in hearing protection devices, headphones and the like of the type comprising a frame (1) and plugs (2) arranged at both ends of the frame. Each of the plugs is pressed into contact with the orifice of the related auditory meatus and may also partly enter the passage. The frame (1) is provided with means (3) that contact the skull bone at the related ear for the purpose of dampening vibrations in the frame. Those means can be shaped like bent or enlarged portions of the frame adjacent to each end thereof, said portions being arranged, when the device is in use, to be held in pressure contact against the skull bone in the area of the respective ear.
摘要:
Tool for injection-molding a hearing protection cup which comprises a curved shell (2) with an opening for receiving an ear, and a washer (7) which extends around the opening and is connected to the edge thereof. The washer projects inward across the opening along at least two opposite sides thereof and is intended to support a sealing and comfort ring which is intended to rest against the head. The tool comprises a comon mold cavity intended to produce the shell (2) and the washer (7) in one piece, and an insert which can be introduced into this mold cavity for forming the inner surfaces of the shell and of the washer. The insert is divided into at least three portions (13, 14) by means of dividing planes which extend in the same principal direction as the opposite sides of the opening. The invention also relates to a method for producing a hearing protection cup, and to a hearing protection cup produced using said method.
摘要:
Ear defenders comprising an elastic headband (1) and an ear muff (4) arranged on the inside of each leg (2) of the headband. The ear muffs (4) are arranged displaceably along the insides of the legs (2) from the end positions of the legs and so far along the legs that the free ends (7) of the latter can be bent towards and connected to one another, so that the legs completely surround the ear muffs (4). This means that the ear defenders can be compressed before storage in, for example, a pocket.
摘要:
Ear defenders comprising an elastic headband (1) and an ear muff (4) arranged on the inside of each leg (2) of the headband. The ear muffs (4) are arranged displaceably along the insides of the legs (2) from the end positions of the legs and so far along the legs that the free ends (7) of the latter can be bent towards and connected to one another, so that the legs completely surround the ear muffs (4). This means that the ear defenders can be compressed before storage in, for example, a pocket.