DE1249969B - - Google Patents

Description

WOUND REPUBLIC OF GERMANY

EUCHES

PATENT OFFICE

rculet

USLEGATE

Int. Cl .:

HOSk

German class: 21c - 24/02

Number: 1249 969

File number: A 40452 VIII d / 21 c

Filing date: June 15, 1962

Opened on September 14, 1967

The invention relates to an introduction of electrical conductors into housings of electrical devices, in particular Microphone housing, in which the cable containing the conductors has an opening in the housing final, rotatably mounted insert is inserted, the one receiving the cable Channel contains.

Microphones, particularly amateur microphones, generally come with a hardwired Cable supplied that ends in a standardized plug. The cable is here by means of a grommet made of rubber or an elastic plastic inserted through an opening in the microphone housing. In As a rule, a strain relief is also provided, which prevents any mechanical pull on the Cable the connection contacts damaged.

This type of cable entry has the disadvantage that it is rigid and the cable often goes in one direction steers, which does not correspond to the expediency of the cable routing. Sometimes it is with one too such an introduction impossible to place the microphone on a flat surface with only one support, because the cable grommet provides an additional support point that connects to the lower edge of the microphone £ does not lie in one plane.

For "larger box-shaped housings of electrical devices, a cable entry is known which is in the essentially consists of an inserted into an opening in the housing wall and a rubbing of the Cable on the thin housing wall preventing implementation in the manner of a straight pipe socket consists on which an insert is rotatably mounted in the form of an elbow, which in turn with a flexible pipeline containing the electrical conductors is in communication. Such a cable entry is therefore generally unusable for a small microphone housing, for example, because it is too large and complicated and would be detrimental to the aesthetic appearance of the device.

In the case of another electrical line connection in a device provided with two connections, the Arrangement made such that a line connection is guided via a sliding contact, opposite which the device arranged in the housing is movable and which is attached to the housing with one fixed clamp is connected.

The other line connection is on a metallic part of the housing. This line connection can only be used for very special devices, for example a pot magnet housed in a housing. There is no mobility of the electrical conductors with respect to the housing.

Introduction of electrical conductors in the housing
electrical devices, in particular
Microphone housing

Applicant:

Acoustic and cinema equipment company m. B. H., Vienna

Representative:

Dipl.-Ing. W. Scherrmann, patent attorney,

Eßlingen / Neckar, Fabrikstr. 9

Named as inventor:
Ernst Pless, Vienna

Claimed priority:

Austria from October 18, 1961 (A 7853/61)

The aim of the invention is to introduce electrical conductors into housings of electrical devices, in particular To create microphone housing of the type mentioned, the disadvantages of the known constructions avoids getting through a versatile design option to adapt to different Characteristics and offers the possibility to provide a strain relief.

For this purpose, the introduction according to the invention is designed such that the insert is a Is a solid body of revolution which has a recess emanating from a circumferential surface, for example, a bore, a groove or a slot, and at least one to the recess transverse axis is rotatable.

The body of revolution can advantageously be a cylindrical flat disk around its cylinder axis is rotatably mounted, the recess formed in it straight in the manner of a Chord runs near the cylinder axis. In this embodiment, the electrical Ladder inserted into the housing such that it can pivot in one plane. Can be pivoted on several sides if desired, the arrangement can be made in such a way that the body of revolution is a solid sphere is, which is rotatably mounted in a corresponding recess of the housing, the recess is designed as a straight, the ball penetrating hole, which is preferably through the center of the sphere runs. Should a strain relief be provided

709 647/405

Claims (9)

will see, it is useful if the recess of the rotary body, which is assigned to the cable containing the electrical conductors, has a curvature for strain relief. In addition, as is known per se in the case of strain relief for electrical lines, the recess can have a wedge-shaped or conical shape into which the conductor can be pressed with a wedge-shaped body. The new introduction is characterized by a very useful and compared to the prior art much simpler structure and also makes it particularly easy to carry out the introduction of the ladder with strain relief, while at the same time excellent adaptability to the respective requirements of the individual devices and Housing constructions is given. For a better explanation of the invention, reference is made to the drawing in which FIGS. 1 a and 1 b is shown in a schematic representation in plan and elevation of a basic embodiment. F i g. 1 c shows a preferred possibility for strain relief of the cable. In FIGS. 2a, 2b and 3 a, 3 b, for example, two different installation options for the rotary body of the introduction according to the invention are shown. As the F i g. 1 a, 1 b show, the rotational body of the introduction according to the invention can be designed as a cylindrical body 1 which has a recess 2 in the form of a slot or a bore. However, the invention is not limited to the cylindrical shape of the rotating body, which can also be referred to as a “cable pill”. This can also be spherical and be mounted in a spherical cavity of the housing. In the case of a cylindrical body of revolution, the cable can only be moved in one plane, whereas a spherical body of revolution allows spatial movement. For the sake of simplicity, the invention will only be explained using a cylindrical body of revolution. Such a body of revolution is expediently mounted rotatably about a pin 3, which is usually formed by a screw. If the recess for the cable consists of only one slot 2, then it is necessary that the latter faces a housing wall 6 with its open side so that the cable cannot jump out. If a hole is used, the rotational body can be arranged as desired. The housing in the housing is expediently in a corner, since at this point the curvature of the wall 4, 5 can be matched to the diameter of the cylindrical rotating body, so that a harmonious exterior of the microphone is ensured. One could of course also choose another place in the housing for accommodating the rotary body, but if one wants to have a sufficient angle for the cable movement, in this case it must protrude from the housing wall. 2a, 2b and 3a, 3b show two possibilities for mounting a cylindrical rotating body in a microphone housing. In the embodiment shown in FIGS. 2a, 2b, the rotary body can be pivoted in a plane parallel to the front or rear wall of the microphone housing. In this case, the cable can be pivoted to the side, namely the rotary body can be rotated once so that the cable is led vertically downwards out of the microphone, as is usually expedient when the microphone is arranged on a tripod. In the other extreme position, the cable protrudes from the side of the housing, which setting when the microphone is placed on a flat surface, e.g. B. on a table is required. Of course, you can also choose any intermediate position as required. In the case of the FIG. 3 a, 3 b illustrated embodiment, the body of revolution, assumed to be cylindrical, can be rotated in a plane perpendicular to the front panel. Accordingly, in one extreme position the cable either exits approximately perpendicular to the rear wall, in the other, however, it points vertically downwards. In this exemplary embodiment, too, it is easily possible to either place the microphone on the table or to mount it on a tripod without being hindered by the emerging cable. As already mentioned at the beginning, it is necessary to provide a strain relief for the cable. When using the rotary body according to the invention, this can either take place in the previously customary manner, but this can also be avoided with the invention by appropriately designing the recess for the cable. For example, you can make the recess conical and insert the cable with a wedge. In order to secure the cable against kinking, it is common to attach so-called cable sleeves to cable versions. If a kink protection is also to be provided in the rotary body according to the invention, it can be produced with a cable grommet at the outlet opening. If necessary, the grommet and body of revolution can consist of one piece. The kink protection can be connected to the strain relief by using a toggle sleeve that is inserted into the recess. In order to fix the end positions of the rotatable body of revolution according to the invention, projections in the form of lugs or humps can also be attached to the body of revolution, which projections abut against corresponding stops in the housing. Rest points can also be attached to define special intermediate positions. Patent claims: 1. Introduction of electrical conductors into housings of electrical devices, in particular microphone housings, in which the cable containing the conductors has an opening in the housing final, rotatably mounted insert is inserted, the one receiving the cable Contains channel, characterized in that the insert (1) is designed as a solid body A body of revolution that has a recess (2) extending from a circumferential surface, for example a bore, a groove or a slot, and at least one to the recess (2) the transverse axis is rotatable. 2. Introduction according to claim I _5, characterized in that the rotational body (1) has a is a cylindrical flat disc which is rotatably mounted about its cylinder axis (3) and which recess (2) formed in it in a straight line in the manner of a chord of a circle in the vicinity of the cylinder axis runs. 3. Introduction according to claim 1, characterized in that the rotational body (1) a Is full ball, which is rotatably mounted in a corresponding recess of the housing and the recess (2) is designed as a straight bore penetrating the ball, which is preferably runs through the center of the sphere. 4. Introduction according to claim 1 and one of claims 2 or 3, characterized in that the recess (2 a, 2 b, 2 ') for the cable for strain relief has a curvature (Fig. Ic). 5. Introduction according to claim 1, characterized in that the recess (2) in itself known way has a wedge-shaped or conical course, in which the conductor with can be pressed into a wedge-shaped body. 6. Introduction according to one or more of claims 1 to 5, characterized in that the rotating body (1) is made in one piece with a cable grommet. 7. Introduction according to one or more of the Claims 1 to 6, characterized in that the rotating body (1) has projections on its periphery which cooperate with stops in the housing, so that certain positions preferably the end positions can be clearly fixed. 8. Introduction according to one or more of claims 1 to 7, characterized in that the rotating body (1) has notches through which intermediate positions can be fixed. 9. Introduction according to one of the preceding claims, characterized in that the Rotary body (1) arranged in the area of two abutting housing walls (4, S) and the opening with the omission of parts of the housing wall (4, S) at the joint and formed by parts of the circumferential surface of the rotating body arranged in the housing interior (1) is complete. Considered publications:
German Patent No. 462598;
German Auslegeschrift No. 1070 262;
German utility model No. 1849 744;
U.S. Patent No. 2,124,942. 1 sheet of drawings 709 647/403 9.67 - © Bundesdruckerei Berlin