DE1256704B - Housing for larynx microphones made of thermoplastic plastic - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

H04r

German KL: 21 a2- 19/02

Number:
File number:
Registration date:
Display day:

H 47083 VIII a / 21 a2
5th October 1962
December 21, 1967

The invention relates to a housing for larynx microphones made of thermoplastic material in two-part design consisting of pot and lid.

Telephone housings in a two-part design made up of a pot and a lid have become known, in which the cap-like lid can be screwed on by means of an internal thread via an external thread provided on the edge of the pot. These known housings have the disadvantage that if the parts are not handled carefully, the thread can be damaged when the parts are screwed together, especially when the pot and lid are made of a thermoplastic material.

The invention is based on the object at ι $ housings for throat microphones of thermoplastic material in two-piece, from pot and lid existing design to ensure ease of assembly with good sealing against the outside air by simple means even with rough handling "o reliable.

This object is achieved in that at the top of the pot almost over half the circumference of an annular groove is provided in which the bead of the lid as Can be inserted laterally in such a way that by a single fastening means such as rivet, connecting screw or the like, the one on the opposite of the groove Side of the lid is provided, the lid with the housing pot twisting and lifting off is connectable.

The invention has the advantage that a simplified Assembling is guaranteed with simultaneous good sealing against the outside air, so that the air cushions present in the interior of the housing desirably have a high degree of rigidity, this assembly with the simplest means using a single fastening screw rotation and lift-off is possible, which is robust handling and thus a long service life ensures.

Further details of the invention are explained in more detail with reference to the drawing. It shows

F i g. 1 is the general view of a larynx microphone device with partial cut through one of the two microphones,

F i g. 2 shows an interior view of the cover of the microphone housing,

F i g. 3 a side view of the housing pot,

F i g. 4 shows a cross section through the cover according to line IV-IV of FIG. 2,

F i g. 5 shows an interior view of the housing pot and housing for larynx microphones
thermoplastic plastic

Applicant:

Holmberg & Co.,

Berlin SO 36, Ohlauer Str. 5-11

Named as inventor:

Werner Hess, Berlin-Zehlendorf

F i g. 6 shows a cross section through the cover at the location of the cable openings in the section along the line VI-VI of FIG. 2.

The larynx microphone device consists of the two microphones 27 and 28, which are connected to one another by means of a neck bracket 23, which is fastened with its bracket ends 30, 31 in a beak attachment 33, 37 on the pot 29 or cover 9 of the microphone housing 3.

The pot 29 and the cover 9 of the microphone housing 3 are made of thermoplastic, in particular hard PVC, in a single operation using an injection molding process.

Starting from the end face 35 of the pot 29 , an annular shoulder 39 that is set back towards the center is provided over half the circumference. Starting from the cylindrical ring surface 40 of this shoulder, an annular groove 7 is arranged below a bead 41, which extends only over part of the arc length of the ring shoulder 39, namely corresponding to the central angle *, which is smaller than 180 °.

Corresponding to the annular shoulder 39, a cylinder flange 42 is located in the cover 9 over half the circumference provided in the vicinity of the edge portion 49 which protrudes beyond the end face 36 of the cover and the Corresponds to the height of the ring shoulder 39 of the pot. The arc length of the groove 7 protrudes accordingly from the Cylinder flange 42 inwardly has a bead 8 so that between it and the end face 36 a partial annular groove 25 is created.

The beak extensions 33, 37 are arranged on the cover 9 and pot 29, diametrically opposite the grooves 7, 27, in the vicinity of the end faces 35 and 36, respectively. A metal threaded bushing 26 was injected into the beak extension 33 during the injection molding process, while a countersunk hole 38 for the connecting screw 10 is provided in the beak extension 37.

709 709/334

Claims (7)

In the interior of the cover 9, threaded sockets 13 are provided, by means of which the connections of the supply cable 17 and the connecting cable 18 are optionally interconnected. The strain relief 19, 20 for the cables 17 and 18 is also provided in the cover. Finally, the cover 9 contains two cable entry openings 21, 22 near the cover base 47 for inserting the cables 17 and 18, respectively. These openings are mainly located in the cylinder wall part 48 at the transition point between the base 47 and the edge part 49 of the cover . In order to make the passage cross-section for the cables sufficiently large, the base can be provided with bulges 50 in the area of the openings. The microphones are assembled as follows: the microphone capsule 1 is inserted into the pot 29 of each microphone. Then the cover 9 is moved in the direction of its bead 8 ao towards the beak part 37 according to the arrow C until the bead 8 engages in the annular groove 7. The connecting screw 10 is then screwed in through the bore 38 of the cover 9. During this process, the cylinder wall parts 51, which adjoin the groove 7 in the pot and represent parts of the annular shoulder 39, facilitate the easy and safe insertion of the respective bead 8 into the associated groove 7. 30 Patent claims: 1. Housing for larynx microphones made of thermoplastic material in two parts, made of Pot and lid of existing construction, characterized in that the upper Edge of the pot (29) an annular groove (7) is provided almost over half the circumference, into which during assembly, the edge bead (8) of the cover (9) can be pushed in laterally in such a way that thereby a single fastening means such as rivet, connecting screw (10) or the like the side of the cover opposite the groove is provided, the cover with the housing pot Can be connected to prevent twisting and lifting off. 2. Housing for larynx microphones according to spoke 1, characterized in that, starting from the end face (35) of the pot (29) over half the circumference, a ring shoulder (39) that is set back towards the center is provided, so its cylindrical ring surface (40) below an edge bead (41), the annular groove (7) is arranged, which extends only over part of the arc length of the annular shoulder (39), namely corresponding to a central angle <x , which is smaller than 180 °, and that according to the shoulder (39 ) a cylinder flange (42) is provided in the lid (9) over half the circumference near the edge part (49), which protrudes beyond the end face (36) of the lid and corresponds to the height of the shoulder (39) of the pot (29) , and that from the cylinder flange (42) inwardly directed an edge bead (8) is provided, the arc length of which corresponds to the arc length of the annular groove (7) in the pot, so that a partial annular groove between the edge bead (8) and the end face (36) (25) arises. 3. Housing for larynx microphones according to claim 1 or 2, characterized in that diametrically opposite the grooves (25 and 7) both in the cover (9) and in the housing pot (29) in the vicinity of the end faces (35 and 36), beak attachments (33, 37) are provided, in which the connecting screw (10) comes into engagement. 4. Housing for larynx microphones according to claim 1 to 3, characterized in that on the inside of the cover (9) threaded sockets (13) are used, by means of which the connections the feed and connection cables (17, 18) are optionally interconnected, and that the strain relief (19, 20) is arranged in the cover. 5. Housing for larynx microphones according to claim 1 to 4, characterized in that the The supply cable (17) runs on one side and the connecting cable (18) of both capsules (27, 28) is guided over the neckband (23). 6. Housing for larynx microphones according to claim 1 to 5, characterized in that im Lid (9) two cable entry openings (21, 22) near the lid base (47) for the Introducing the cables (17 or 18) are provided so that these openings in the Mainly in the cylinder wall part (48) located at the transition point between the The bottom (47) and the edge part (49) of the cover lies, with the bottom in the area of the openings is provided with bulges (50). 7. Housing for larynx microphones according to claim 1 to 6, characterized in that the Neckband (23) with its temple ends (30,31) each in one of the beak extensions (32, 33) of the microphone housing (3) is attached. Considered publications:
German Patent No. 968 712;
British Patent No. 643,464;
U.S. Patent No. 2,496,483.1809,749. 1 sheet of drawings 709 709/334 12.67 © Bundesdruckerei Berlin