RU1801438C - Antinoise earphones - Google Patents

Abstract

The invention relates to medical equipment, in particular to personal protective equipment against harmful effects, acoustic noise on the human body. The invention improves reliability and improves physiological and hygienic compatibility with humans. The noise-canceling headphones contain a headband consisting of two plugs J 13 ju.

Description

mutually movable, rigid elastic brackets 2 with shanks 4 for headphone housings 1, headphone housings 1 with treads 16 and sound-absorbing inserts 17 that are attached to the head shanks 4 via an intermediate element 7, Two split elastic brackets 2 are connected by holder 3, made in the form of an arc, the opposite ends of which are provided with guides 13 and a comb 12 transverse to the longitudinal axis to fix the protrusion 10 of the elastic bracket 2. The holder 3 is provided with a damper 14 azkreplennym in its lower part, with the possibility of being replaced, and is made of elastic material. The shanks 4 of each elastic bracket 2 are made with spherical surfaces 5 and 21 with an opening 6 for attaching to the headphone housing 1 by means of an intermediate element 7, which is made with a spherical part 8 and a rod part 9 and is installed in the holes 6 and 20 of the shank 4 of the elastic bracket 2 and the earphone housing 1 with the possibility of interacting with their convex 21 and concave 5 surfaces with the counter surfaces 5 of the shank 4 of the elastic bracket 2 and the spherical recess 19 of the earphone housing 1. The core part 9 of the intermediate element 7 is rigidly fixed in the hole 20 in the earphone housing 1, while on the inside of the housing 1 the above hole is hermetically closed by a cover 22. In addition, a sector-shaped recess 23 is made on the earphone housing 1 for locating the elastic bracket 2 for adjusting the relative position of the elastic brackets 2 and the cases 1 of the headphones, 7 ill. 2 table.

The invention relates to medical equipment, in particular to personal protective equipment against the harmful effects of acoustic noise on the human body.

The purpose of the invention is to increase reliability and improve the characteristics of physiological and hygienic compatibility with humans.

Figure 1 shows a General view of anti-noise headphones; figure 2 is the same side view; figure 3 - anti-noise earphone, section; figure 4 - elastic bracket headband; figure 5 - holder, section; figure 6 - holder, side view; Fig.7 - damper,

- bottom view and side view.

Figure 1 shows: 1-soundproof enclosures; 2 - headband made of two detachable elastic brackets; 3 - holder; 4 - a shank of a bracket; 14 - damper; sixteen

- protector (embishur); 18 - acoustic valves.

Figure 2 shows: 1 - soundproofing housing; 2 - headband; 3 - holder; 4

- shank of the bracket; 7 - an intermediate element; 18 - acoustic valve; 23 is a sector-shaped recess for positioning an elastic headband bracket.

In Fig. 3 are shown: 1 - soundproofing housing; 2 - headband; 3 - holder; 4

- shank of the bracket; 7 - intermediate element: 8 - convex spherical surface of the intermediate element; 9 - rod part of the intermediate element; 10 - protrusion of the bracket headband, having the shape of a roller; 11 is a protrusion serving as a limiter for movement of the bracket; headband 2;

12 - comb; 13 is a guide; 14 - damper; 16 - tread; 17 - noise attenuating insert; 18 - acoustic valve; 19 - spherical recess; 20. -. The hole of the spherical recess of the housing; 22

- a lid covering the opening of the spherical recess of the housing; 23 is a sector-shaped recess for positioning the elastic bracket of the headband 2.

In Fig, 4 shows: 2 - elastic bracket headband; 4 - a shank of a bracket; 5 - concave spherical surface of the bracket headband; 6

- a hole of a concave spherical surface - brackets are bare.v; 10 - bracket protrusion

roller-shaped headband; 11 - ledge, serving as a limiter to move. no staples headband when fitting headphones; 21 - convex part of the shank of the bracket headband.

Figure 5 shows; 3 - holder; 12 is a comb; 13 is a guide holder.

In FIG. 7 shows: 14 - damper; 15 - slots on the outer surface of the damper.

According to the results of tests conducted anti-noise headphones PAN-L received the following characteristics: weight 0.190 kg; the pressure force created by the headband on the parotid region, 9 N; specific pressure on the parotid region - not

more than 4 kPa; stiffness headband 0.015 nZm;

the volume of the sound-absorbing housing is 320 cm3.

Acoustic Efficiency (Medium

noise attenuation) are given in table 1.

Based on the results of tests conducted on the PAN-L anti-noise headphones, the following characteristics were obtained: weight 0.330 kg (without cord) and 0.390 kg (with cord); the pressure force created by the headband on the parotid region -9 N; specific pressure on the parotid region - not more than 4 kPa; stiffness headband 0,015 N / m; the volume of the sound-absorbing case is more than 320 cm.

The acoustic performance is shown in Table 2.

The PAN-A and PAN-L anti-noise headphones are suitable for use in almost all climatic conditions.

The materials used for PAN-A and PAN-L (ABC plastic, impact resistant polyethylene, PVO film) do not emit toxic and skin irritating substances, do not contaminate the skin, and do not have adhesive properties. Metal parts are made of stainless materials. The materials used are hygienic.

FORMULA AND SECTION

Antinoise headphones containing headphone c. protectors and

the headband, consisting of two detachable, made with the possibility of mutual movement of the rigid elastic brackets with shanks, characterized in that,

in order to increase reliability and improve physiological and hygienic compatibility, when used by humans, they have a holder connecting the brackets to each other, in the form of an arc, opposite

the ends of which are provided with a comb for fixing the position of the bracket, a damper with slots on the outer surface, fixed in the lower part of the holder, an intermediate element having a convex

a spherical surface located in the concave spherical surface of the shanks of the brackets, and a rod part rigidly fixed in the opening of the earphone body, closed from the inside by a hermetically sealed lid, and sound-absorbing earbuds placed in the earphone housings, in the upper parts of which there is a sector-shaped recess for positioning

staples.

Table 1

Table 2

Fie. 4.

FIG. %

Fig. Ј

fifteen

m

tf

FIG. 7.