PLANAR LOUDSPEAKER

Abstract

Planar loudspeaker comprising a planar sound panel (10), a mounting (12), at least one drive unit (14) for driving the sound panel (10), said drive unit preferably being attached to the mounting (12), and at least one stabilizing device (22) for stabilizing a movement of the sound panel (10), wherein the stabilizing device (22) is arranged between the sound panel (10) and the mounting (12) and comprises at least a stroke section (28), which is configured so as to be movable, flexible and/or elastic, and at least one centering device (36) for centering the sound panel (10) and/or at least a part of the drive unit (14), wherein the centering device (36) is arranged in a different plane than the stabilizing device (22) and comprises at least a stroke section (28), which is configured so as to be movable, flexible and/or elastic.

Claims

1. Planar loudspeaker comprising a planar sound panel (10), a mounting (12), at least one drive unit (14) for driving the sound panel (10), and at least one stabilizing device (22) for stabilizing a movement of the sound panel (10), wherein the stabilizing device (22) is arranged between the sound panel (10) and the mounting (12) and comprises at least a stroke section (28), which is configured so as to be movable, flexible and/or elastic, and at least one centering device (36) for centering the sound panel (10) and/or at least a part of the drive unit (14), wherein the centering device (36) is arranged in a different plane than the stabilizing device (22) and comprises at least a stroke section (28), which is configured so as to be movable, flexible and/or elastic, characterized in that stabilizing device (22) does not surround the drive unit (14) and the drive unit (14) and the stabilizing device (22) are spaced apart from one another, and the centering device (36) does not surround the drive unit (14) and the centering device (36) is spaced apart from the drive unit (14).

2. Planar loudspeaker in accordance with claim 1, characterized in that the drive unit (14) comprises a panel-shaped coil carrier (20) with a coil configured thereat and a magnet device (16), wherein the coil carrier (20) is arranged in a gap between two magnet units (18) of the magnet device.

3. Planar loudspeaker in accordance with claim 1, characterized in that at least two drive units (14) are provided.

4. Planar loudspeaker in accordance with claim 1, characterized in that the stabilizing device (22) is arranged centrally at the sound panel (10).

5. Planar loudspeaker in accordance with claim 1, characterized in that several stabilizing devices (22) are distributed across the sound panel (10).

6. Planar loudspeaker in accordance with claim 1, characterized in that the stroke section (28) comprises or consists of a rubber, foam and/or fabric material.

7. Planar loudspeaker in accordance with claim 1, characterized in that the stroke section (28) comprises a recess.

8. Planar loudspeaker in accordance with claim 1, characterized in that the stroke section (28) has an annular configuration.

9. Planar loudspeaker in accordance with claim 1, characterized in that the stroke section comprises or consists of a beading (28) and/or a spider (30).

10. Planar loudspeaker in accordance with claim 1, characterized in that the stabilizing device (22) comprises a retaining ring (24, 26).

11. Planar loudspeaker in accordance with claim 1, characterized in that the stabilizing device (22) comprises two retaining rings (24, 26), wherein the stroke section (28) is arranged between the retaining rings (24, 26).

12. Method for producing a planar loudspeaker, in which a stabilizing device (22), which comprises at least a movably, flexibly and/or elastically configured stroke section (28), is arranged, for the purpose of stabilizing a flat sound panel (10), between the sound panel (10) and a mounting (12), and in which a centering device (36), which comprises at least a movably, flexibly and/or elastically configured stroke section (28), is arranged, for the purpose of centering the sound panel (10) and/or at least a part of the drive unit (14), in a different plane than the stabilizing device (22), characterized in that the stabilizing device (22) does not surround a drive unit (14) for the purpose of driving the sound panel (10) and the drive unit (14) and the stabilizing device (22) are spaced apart from one another, and the centering device (36) does not surround the drive unit (14) and the centering device (36) is spaced apart from the drive unit (14).

13. Planar loudspeaker in accordance with claim 1, characterized in that said drive unit is attached to the mounting (12).

14. Planar loudspeaker in accordance with claim 5, characterized in that the stabilizing devices (22) are arranged at four corner areas of the sound panel (10).

15. Planar loudspeaker in accordance with claim 1, characterized in that the stroke section (28) comprises a central recess.

16. Planar loudspeaker in accordance with claim 11, characterized in that the two retaining rings (24, 26) have different diameters.

Description

[0104] The invention is described below by way of example with reference to the drawings. They show in:

[0105] FIG. 1 a perspective bottom view of an embodiment of a planar loudspeaker,

[0106] FIG. 2 a perspective plan view of an embodiment of a planar loudspeaker,

[0107] FIG. 3 a side view of an embodiment of a stabilizing device of a planar loudspeaker,

[0108] FIG. 4 a perspective bottom view of a further embodiment of a planar loudspeaker,

[0109] FIG. 5 a cutaway perspective view of an embodiment of a stabilizing device of a planar loudspeaker,

[0110] FIG. 6 a plan view of a further embodiment of a planar loudspeaker,

[0111] FIG. 7 a cutaway perspective view of a further embodiment of a planar loudspeaker,

[0112] FIG. 8 a cross-sectional view of an embodiment of a planar loudspeaker,

[0113] FIG. 9 a cutaway perspective view of a further embodiment of a planar loudspeaker,

[0114] FIG. 10 a cutaway perspective view of a further embodiment of a planar loudspeaker,

[0115] FIG. 11 a perspective plan view of an embodiment of an inventive planar loudspeaker,

[0116] FIG. 12 a perspective plan view of a further embodiment of an inventive planar loudspeaker,

[0117] FIG. 13 a perspective plan view of a further embodiment of an inventive planar loudspeaker, and

[0118] FIG. 14 a cross-sectional view of a further embodiment of an inventive planar loudspeaker.

[0119] First of all, it should be noted that the embodiments shown are of a purely exemplary nature. Thus, individual features can be implemented not only in the combination shown, but also on their own or in other technically useful combinations. For example, the features of one embodiment may be combined arbitrarily with features of another embodiment. In particular, the shape, number and/or position of the stabilizing device(s), centering device(s) and drive units can vary.

[0120] Where a drawing contains a reference numeral which is not explained in the directly associated descriptive text, reference is made to the corresponding previous or subsequent deliberations in the description of the drawings. Thus, the same reference numerals are used for the same or comparable components in the drawings and are not explained again.

[0121] FIG. 1 shows a planar loudspeaker comprising a planar sound panel 10 and a mounting 12. The mounting 12 can comprise several individual parts connected to one another, especially screwed together. Alternatively, the mounting 12 can also be configured as a single piece.

[0122] Two drive units 14 are attached, especially screwed, to the mounting 12.

[0123] The drive units 14 each comprise a magnet device 16 having two magnet units 18 and a panel-shaped coil carrier 20 arranged in a gap between them.

[0124] A stabilizing device 22 is arranged between the drive units 14. The stabilizing device 22 extends between the sound panel 10 and the mounting 12.

[0125] As shown in the plan view according to FIG. 2 (the sound panel 10 is shown transparent), the stabilizing device 22 comprises a first retaining ring 24 and a second retaining ring 26. The first retaining ring 24 has a smaller diameter than the second retaining ring 26.

[0126] As can be seen in FIG. 3, too, a stroke section configured as a beading 28 is provided between the retaining rings 24, 26. As a result of the stroke section 28, the retaining rings 24, 26 are connected to one other such that they can move relative to one other. The stabilizing device 22 can thus reproduce the movement of the sound panel 10, which is driven, especially synchronously, by the drive units 14.

[0127] In FIG. 4, the stabilizing device 22 is formed by a spider 30. Retaining rings are unnecessary.

[0128] According to the cross-sectional view in FIG. 5, the spider 30 is configured as a type of concentric spring. The spider 30 can especially have a central recess or it can be closed.

[0129] It is also possible for two spiders 30 to be used together. In that event, the spiders 30 can be attached coaxially one above the other in opposite orientations. The spring travel is thereby extended.

[0130] In the embodiment shown in FIG. 6, four stabilizing devices 22 are provided instead of one central stabilizing device. These are arranged at the corner areas of the sound panel 10.

[0131] FIG. 7 shows a sound panel 10 that is connected to a support frame 34 via retaining elements 32.

[0132] The retaining elements 32 are comparatively narrow and do not extend around the entire circumference of the sound panel 10. In particular, the retaining elements 32 are narrower than the distance between two retaining elements 32.

[0133] In particular, the retaining elements 32 can be evenly distributed on the sound panel 10. Preferably, at least one retaining element 32 is provided at each side of the sound panel 10. In this way, the sound panel 10 can be stabilized and/or centered at each side.

[0134] The retaining elements 32 are preferably elastic. This facilitates in particular relative movement between the sound panel 10 and the support frame 34.

[0135] As can be seen in FIG. 8, the retaining element 32 can have an undulating section. As a result, a certain amount of play is facilitated.

[0136] One arm of the retaining element 32 can be connected to the sound panel 10, while the other arm can be connected to the support frame 34.

[0137] FIG. 9 shows that the retaining element 32 can also have a U-shaped configuration. The arms of the U-shaped retaining element 32 can in particular be oriented parallel with the support frame 34.

[0138] The retaining element 32 can, as it were, unroll during a stroke movement of the sound panel 10. In particular, the apex can rise or fall.

[0139] As shown in FIG. 10, the arms of the U-shaped retaining element 32 can especially be oriented parallel with the sound panel 10.

[0140] The retaining element 32 can, as it were, unroll during a stroke movement of the sound panel 10.

[0141] FIG. 11 shows a planar loudspeaker comprising a central stabilizing device 22 and a plurality of centering devices 36. The centering devices 36 are arranged above the stabilizing device 22 and hence in a different plane.

[0142] One centering device 36 is arranged coaxially with the stabilizing device 22.

[0143] This can be omitted, as may be seen in FIG. 12. The arrangement in different planes ensures sufficient stabilization or centering even if the centering devices 36 and the stabilizing device 22 are not arranged directly one above the other.

[0144] As shown in FIG. 13, it is also possible for several, especially decentralized, stabilizing devices 22 to be provided. For example, a stabilizing device 22 can be arranged in each corner area. Immediately above it, for example, can be located a centering device 36 in each case.

[0145] In FIG. 14, a centering device 36 is arranged coaxially above a stabilizing device 22. The centering device 36 and the stabilizing device 22 can move relative to one other, especially in opposite directions.

[0146] The stabilizing device 22 is movably connected to the sound panel 10, while the centering device 36 can be movably attached to the mounting 12 via a retaining means 38.

[0147] Preferably, the stabilizing device 22 can comprise a stabilizing support configured as a stabilizing tube 40. The stabilizing support 40 is fixedly attached, e.g. adhesively bonded, to the mounting 12.

[0148] The centering device 36 comprises a centering support configured as a centering tube 42. The centering tube 42 can be hollow or solid.

[0149] The centering support 42 is fixedly attached, e.g. adhesively bonded, to the sound panel 10.

[0150] Preferably, the diameter of the centering support 42 is smaller than the diameter of the stabilizing support 40. In particular, the centering support 42 is arranged within the stabilizing support 40.

LIST OF REFERENCE NUMERALS

[0151] 10 Sound panel [0152] 12 Mounting [0153] 14 Drive unit [0154] 16 Magnet device [0155] 18 Magnet unit [0156] 20 Coil carrier [0157] 22 Stabilizing device [0158] 24 First retaining ring [0159] 26 Second retaining ring [0160] 28 Beading, stroke section [0161] 30 Spider [0162] 32 Retaining element [0163] 34 Support frame [0164] 36 Centering device [0165] 38 Holding means [0166] 40 Stabilizing tube, stabilizing support [0167] 42 Centering tube, centering support