Headphone

Abstract

The present invention relates to a head-mounted earphone. A mechanical device that holds a movable part in a stationary state relative to another part until a determined limit is called a braking mechanism. In a device having two parts movable relative to each other, a magnetic braking mechanism is provided. The two parts movable relative to each other can move relative to each other in a preset direction. The magnetic braking mechanism consists of two multi-pole magnetized magnetic films. Each multi-pole magnetized magnetic film is fastened to one of the two parts movable relative to each other. When the two parts movable relative to each other move relative to each other in the preset direction, the two multi-pole magnetized magnets move along with a small spacing from each other. Here, the magnetic force acting between the parts affects the force required for movement and defines a preferred position or a locking position where opposite magnetic poles are opposed to each other. The magnetic braking mechanism can be used for an adjustable bow of a head-mounted earphone.

Description

Field of the Invention

[0001] The present invention relates to a device having movable parts and a braking mechanism (Gehemme), in particular a magnetic braking mechanism. Background Art

[0002] In many different devices, such as in the bows of adjustable headphones, but also in closures or slide switches, parts can move relative to each other or be mechanically adjusted. In this case, a defined movement position set by the user should generally be maintained as much as possible, while the force used by the user for the movement should be as small as possible at the same time. In such cases, mechanical devices called locking mechanisms or braking mechanisms are usually used. A locking mechanism can completely maintain or maintain up to a defined limit the stationary state of a generally movable part relative to another part by means of a locking element. In the latter case, it is a braking mechanism. For example, a brake operating according to the Figure 1 principle shown can be used as a locking mechanism or a braking mechanism. Here, a part 120 can, for example, move slidably along another part 110, but a defined preferred position is provided therein. The spacing between the two parts can be fixed, for example, by guides ( Figure 1 not shown in the figure). The force for moving the parts 110, 120 relative to each other is greater in the preferred position or the latching position as in Figure 1 b) than in another position, Figure 1 a). Nevertheless, the movement is feasible. The preferred position or the latching position is usually defined by a locking element 130, here a ball, which is pressed by a spring 140 into a suitable recess 115. The spring 140 can also have another shape, for example, a bending element can be used, which can also include the locking element. Different recesses 115 represent different latching positions.

[0003] Such mechanical locking mechanisms or braking mechanisms have different disadvantages, such as a large number of usually small components, so that installation can be difficult. Thereby, the installation is usually relatively expensive. In addition, the shape of the spring 140 (especially when, for example, a bending element is involved) and the recess 115 can be worn due to use. Summary of the Invention

[0004] It is an object of the present invention to provide an improved low-wear braking mechanism.

[0005] Furthermore, flexible magnetic films are known, which are usually advantageously obtained as fabrics. The flexible magnetic film is composed of a flexible carrier material, such as plastic, which has embedded magnetic elements, which are generally oriented such that the magnetic film is permanent and magnetized only on one side. As Figure 2As shown, the magnetic north pole N and the magnetic south pole S are alternately located on one side 220 of the membrane 210, and there are no poles on the back side 230. Correspondingly, the magnetic field 250 and thus the magnetic force only appear on the pole side 220 of the membrane. The back side 230 can be, for example, overlaid, painted, or adhered to a substrate. As shown in Figure 3 As shown in the perspective view in

[0006] the magnetic poles in the magnetic membrane generally extend in straight parallel rows either in the longitudinal direction or in the transverse direction of the membrane. Here, different parameters are optional, such as the spacing A between the poles, the magnetic force according to the material and thickness D of the membrane, etc. are optional. For example, the thicker the membrane, the higher the magnetic force of the membrane. The usual value of the thickness D is, for example, 0.5 - 2 mm. In addition, the membrane can usually be simply cut into segments with a desired width B and length L by means of scissors.

[0007] The above - mentioned object is achieved by the device according to the embodiment. Here, magnets facing each other are used, which are respectively fastened to components movable relative to each other in order to define a preferred position or a locking position. For this purpose, magnetic membranes facing each other are particularly suitable because the magnetic membranes have a relatively low mass and multiple poles, can be easily cut to a desired size, and can be simply and permanently fastened by adhesion. According to the invention, multi - pole magnets are respectively located at two components facing each other and movable relative to each other, whereby preferred positions or locking positions are obtained by the way of different poles facing each other. In some cases, it may be sufficient to provide multi - stage magnets only at one of the components, while only one pole of the magnet exists on the opposite side (where the other pole of the magnet is shown in another direction).

[0007] Other advantageous embodiments are described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Other details and advantageous embodiments are shown in the drawings. Shown in the drawings are:

[0009] Figure 1 a known locking mechanism or braking mechanism with a spring;

[0010] Figure 2 a known unidirectionally magnetized membrane;

[0011] Figure 3 a perspective view of a unidirectionally magnetized membrane;

[0012] Figure 4 a bearing with a braking mechanism according to the invention;

[0013] Figure 5 different preferred positions or locking positions;

[0014] Figure 6Showing a headset with an adjustable bow;

[0015] Figure 7 Showing a braking mechanism according to the present invention in the bow of a headset, and

[0016] Figure 8 Showing an embodiment with a circular braking mechanism. Detailed Description

[0017] Figure 4 Showing a bearing 400 having a locking mechanism or a braking mechanism according to the present invention. Here, two components 410, 420 are arranged in a sliding bearing, a rolling bearing or other bearings such that the two components can move relative to each other. The direction of movement and the spacing between components 410, 420 can be bounded or preset by a guide (not shown). In the example, the upper component 410 can move laterally (right / left) relative to the lower component 420. On each of the two components 410, 420, a uniaxially multipole magnetized magnetic film 430, 440 is applied, for example adhered. The lines of the same poles of the magnetic films (corresponding to Figure 3 the width B in) extend transversely to the direction of movement, i.e. here perpendicular to the drawing plane. Here, in the preferred position or the latched position, different poles face each other and attract each other. In Figure 4 a), the movable component 410 is at the left stop, which is defined by mechanical bounding, such as here by projections 415, 425, and can thus only move to the right.

[0018] In Figure 4 b), the movable component 410 has moved to the right, where the poles of the upper magnetic film 430 first approach the same poles (not shown) of the opposing lower magnetic film 440. Here, a magnetic repulsive force is generated between the upper magnetic film and the lower magnetic film. In order to first overcome the attraction of the different poles facing each other, and then to overcome the increased repulsive force of the approaching like poles during the movement, a higher force is first used until the like poles face each other. This position is unstable, so that the movable component 410 can be moved further with a small force expenditure until the movable component occupies the next stable preferred position or latched position, in which different poles face each other again. If the friction of the bearing is small enough, the movable component 410 has been pulled by the magnetic force into the next stable preferred position or latched position. This position is shown in Figure 4 b). Since the movement is first braked, the device of the magnets 430, 440 is hereinafter referred to as a braking mechanism.

[0019] Any other movement to the right or left works according to the same principle. In Figure 4In c), the movable part 410 is in the preferred position or latching position at the right stop defined hereby by the projections 415, 425, and can thus only move to the left. However, in principle the stop is optional and not necessary for the function of the braking mechanism. It is also unimportant whether only one or both parts 410, 420 of the bearing 400 are movable, since the parts 410, 420 only have to be movable relative to each other.

[0020] Figure 5 a) shows four different stable preferred positions or latching positions 531 - 534 that the multipole magnet 430 of the movable part 410 of the bearing 400 can assume relative to the multipole magnet 440 of the fixed part 420 of the bearing. Other positions are unstable, but in which the parts 410, 420 can be pulled into the stable positions by magnetic forces.

[0021] In the example, the number of opposite magnetic poles is always the same. Alternatively, the number can be variable, for example by the way in which the poles of the movable part 410 can move out of the force field of the poles of the fixed part 420. In this way, particularly preferred positions can be defined, for example, within the preferred positions, as in Figure 5 shown in b). Here, the multipole magnets of the two parts can be completely, partly (more or less) opposite, or not opposite at all, and the bearing can thus assume a first preferred position (left view), a second preferred position (middle view), or a third preferred position (right view). Here, the third preferred position is more strongly preferred than the second preferred position, and the second preferred position is in turn more strongly preferred than the first preferred position, since the number of opposite magnetic poles is respectively larger. Correspondingly, more force is required to overcome the braking mechanism and leave the position. Additionally, the bearing can optionally assume other positions in which the magnetic poles are not opposite and which are thus not preferred positions (not shown). The frictional resistance of the bearing can be measured such that, in this case, the frictional resistance prevents the bearing from being pulled into one of the preferred positions by the magnetic force itself.

[0022] The invention can be used in a large number of different devices or applications, for example for improved headphone bows.

[0023] In one embodiment, Figure 6Fig. 600 shows a headset with an adjustable bow. The two earcups 620, 630 are padded 621, 631, equipped with sound transducers, etc. as usual, and are connected to the overhead bow 610 via sliding bearings respectively. The tracks 640, 650 fastened to the earcups and movable relative to the bow 610 belong to the sliding bearings respectively. Thereby, the headset can be individually adjusted for different head sizes or ear positions. The braking mechanism is between the movable tracks 640, 650 and the mating parts inside the bow 610. Here, traditionally it usually involves brakes, however according to the present invention, as described above, a magnetic braking mechanism is used, as Figure 7 exemplarily shown for one side of the headset.

[0024] The track 640 fastened to the earcup 620 optionally moves in a guide (not shown) along a mating track 660 inside the bow 610. Here, the braking mechanism is simply (and disproportionally) shown by means of two multipole magnetic films of the same length, but it can also be constructed as in Figure 4 by means of multipole magnetic films of different lengths. As Figure 7 shown in the partial view in, the first multipole magnetic film 670 is fastened, for example glued, to the track 640, and the second multipole magnetic film 680 is fastened oppositely, for example glued, to the mating track 660 of the bow 610. The tracks 640, 660 can be moved relative to each other by means of the preferred positions or latching positions defined by the magnetic films 670, 680.

[0025] Here, for example, the clamp 695 can optionally prevent the lateral deviation of the magnetic film. In some cases, this may already be sufficient to guide the track or at least support the guiding. In some applications (headsets or other devices with movable parts), i.e. when the opposing magnetic films come into contact and the tracks are held together (only) by magnetic force, the braking mechanism can simultaneously serve as a bearing or fastener for the tracks movable relative to each other. Additionally, there can optionally be a thin sliding film 690 or an oil film or a grease film between the magnetic films 670, 680 in order to reduce wear at the magnets in case of direct contact. The stronger the magnetic films 670, 680, and the smaller the distance between the magnetic films, the stronger the effect of the braking mechanism. For example, the distance between the magnetic films 670, 680 should not be greater than the thickness of the magnetic films, but preferably significantly smaller (e.g. depending on the application, 0.1%-5%, 5%-10%, 10%-20% of the thickness), up to direct contact (0%). Additionally, the number of opposing magnetic poles has an influence on the effect of the braking mechanism; the more opposing magnetic poles or the larger the surface of the magnetic film, the stronger the effect (for the same material and distance between the magnets). Therefore, the magnetic attraction or repulsion can be stated in g / cm 2 as the unit.

[0026] Alternatively, other embodiments of the braking mechanism for the headset according to the present invention are also feasible. For example, the tracks 640, 650 can be omitted, and the mating track 660 with the second multi-pole magnetic film 680 can move through the earcups 620, 630. Then, the first multi-pole magnetic film 670 can be inside the earcup to form the braking mechanism according to the present invention together with the second multi-pole magnetic film 680.

[0027] In addition to the linear braking mechanism forms described so far, other forms are also feasible. In this regard, it is particularly advantageous that the magnetic film is flexible. Figure 8 A circular braking mechanism 800 according to the present invention is shown, in which the circular first component 810 can rotate about the center point 830. Here, for example, the multi-stage magnetic film arranged externally on the first component 810 moves along another multi-stage magnetic film fastened to the fixed second component 820. In other embodiments, the annular first component 810 is fixed, while the second component 820 can rotate about the center point 830. In other embodiments 800', the annular first component 810' forms a ring that has a magnetic film on the inner side, where the second component 820' is inside the ring. As described above, in all cases, the opposite magnetic poles define a preferred position or a locking position for the rotation. It is also possible to prevent and thus exclude a certain position, namely the position called unstable above, in which like poles are opposite each other.

[0028] Generally, the present invention relates to a device having two components movable relative to each other, which can move relative to each other in a preset direction, wherein the device includes the following: a first multi-pole magnetized magnet fastened to the first of the two components movable relative to each other; and a second multi-pole magnetized magnet fastened to the second of the two components movable relative to each other. When the two components movable relative to each other move relative to each other in the preset direction, the first multi-pole magnetized magnet moves along the second multi-pole magnetized magnet, more precisely with a small spacing such that a magnetic force that affects the force required for the two movable components to move relative to each other appears between the first and the second multi-pole magnetized magnets. In particular, the magnetic force between the components defines a preferred position or a locking position at which opposite poles are opposite each other.

[0029] One advantage of the present invention is that a unipolar multi-pole magnetized magnetic film that is cost-effectively available can be used. It should be noted that although such a magnetic film can be obtained by means of different spacings between the poles, for example, a spacing of 1.5 - 4.5 mm, the magnetic films opposed to each other in the bearing must have the same spacing between the poles. The spacing A between the poles determines the spacing between different preferred positions or latching positions. The said spacing is twice the spacing A between the poles, i.e., for example, 3 - 9 mm.

[0030] Another advantage is that the number of required components is very small, the installation is very simple, and in many cases, almost no adjustment is required. In addition, the braking mechanism according to the present invention operates completely without wear.

[0031] The embodiment only includes a one-dimensional bearing, which can move, for example, in the left / right direction. However, depending on the arrangement of the magnets and possible guides, the braking mechanism according to the present invention can also move relative to each other in two or three dimensions in principle.

[0032] As long as it is meaningful and feasible, different embodiments of the described embodiments can also be combined with each other. Variations that are not related to the braking mechanism are also feasible. For example, in Figure 6 the headphone 600 shown with a cable can also be wireless, have a telescopic arm and / or only one earcup.

Claims

1. A head-mounted earphone (600) having at least one earcup (620, 630) and an adjustable bow (610; 640 - 660), wherein the adjustable bow comprises two parts (410, 420; 640, 660) movable relative to each other, the parts (410, 420; 640, 660) movable relative to each other being capable of moving relative to each other in a preset direction and being guided thereby, wherein - a first multi-pole magnetized magnet (430; 670) is fastened to a first part (410; 640) of the two parts movable relative to each other; and - a second multi-pole magnetized magnet (440; 680) is fastened to a second part (420; 660) of the two parts movable relative to each other; - wherein when the two parts (410, 420; 640, 660) movable relative to each other move relative to each other in the preset direction, the first multi-pole magnetized magnet (430; 670) moves along the second multi-pole magnetized magnet (440; 680); each of the multi-pole magnetized magnets has a plurality of poles alternating in the direction of movement; and at least one of the multi-pole magnetized magnets (430, 440; 670, 680) comprises a flexible magnetic film; wherein at least two different preferred positions or latching positions (531 - 534) are defined by the magnetic force occurring between the first multi-pole magnetized magnet and the second multi-pole magnetized magnet, and the two parts movable relative to each other can occupy the at least two different preferred positions or latching positions, wherein in each preferred position or latching position, opposite poles of the first magnet and the second magnet are opposed to each other.

2. The head-mounted earphone according to claim 1, wherein the flexible magnetic film is magnetized on one side and is adhered or welded to the first part or the second part (410, 420; 640, 650) by means of its non-magnetic side.

3. The head-mounted earphone according to claim 1 or 2, wherein the two multi-pole magnetized magnets (430, 440; 670, 680) comprise flexible magnetic films, and wherein there is a spacing of 0.1% - 10% corresponding to the thickness of the flexible magnetic film between the flexible magnetic films.

4. The head-mounted earphone according to any one of claims 1 to 3, wherein the spacing (A) between the poles of the first multi-pole magnetized magnet (430; 670) is the same as the spacing (A) between the poles of the second multi-pole magnetized magnet (440; 680).

5. The head-mounted earphone according to any one of claims 1 to 4, wherein the first multi-pole magnetized magnet (430; 670) is shorter or narrower than the second multi-pole magnetized magnet (440; 680) and has fewer poles than the second multi-pole magnetized magnet.

6. The headset according to any one of claims 1 to 4, wherein the two multi-pole magnetized magnets have the same number of magnetic poles and substantially the same width and / or length.

7. The headset according to any one of claims 1 to 6, wherein the track (660) in the bow member and the track (640) fastened to the earcup (620) form two components movable relative to each other, and the multi-pole magnetized magnets (670, 680) are respectively fastened to the two components movable relative to each other.

8. The headset according to any one of claims 1 to 7, wherein the length of the bow member can be changed by the movement of the two components movable relative to each other.

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