Untitled record

Gestfiuysen Ä * on Rbhr * * *

The invention relates to a stand for a speaker.

Over the base of a loudspeaker box, the sound emitted by the loudspeaker box is inadvertently transmitted in the form of structure-borne noise into the floor on which the loudspeaker box stands. This can lead to annoying drone effects especially with bass boxes. Attempts are therefore made to minimize the transmission of structure-borne noise via the base of a loudspeaker box.

Are known feet of metal in Kegeiform. Here, the transmission of structure-borne noise is minimized by the fact that the remaining area for transmission is minimal. This requirement causes the cones are relatively sharp. With such feet, on the one hand, still relatively much structure-borne noise is transmitted, on the other hand, one scratches off furniture or high-quality floor coverings, such as parquet or the like.

Another well-known base is a simple disc of sound-absorbing material, especially rubber, pressed pulp, felt od. Like .. Also wit such a base does not reach a particularly good structure-borne sound insulation.

The invention has for its object to provide a base for a speaker, in which the transmission of structure-borne noise is minimized in the best possible way.

The base according to the invention for a loudspeaker, in which the above-mentioned object is achieved, is characterized by a lower, consisting of a sound-insulating material, in particular rubber, existing stationary disc, at least one mounted on the stationary disc, from the upright disc projecting upwards, small-area spacer element , an upper, made of a sound-insulating material, in particular made of rubber, mounted on the spacer element and held at a distance from the stationary disk support disk and formed by the stationary disk, the spacer element and the support disk inner cavity. This stand is characterized by the fact that in

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Inside the base between two levels of sound insulating material, a cavity is provided in which the structure-borne sound can swing out freely. To create the inner cavity, the spacer element, which is intended to simultaneously cause as far as possible KJrperschall decoupling of the two disc-shaped elements.

Measurements have shown that with the claimed base, the transmission of structure-borne noise is significantly lower than with all previously known stands for speakers.

There are now various ways to design and further develop the stand according to the invention. For this purpose, on the one hand to the claims subordinate to claim 1, on the other hand, refer to the following explanation of preferred embodiments of the invention with reference to the drawings. In the drawing shows

1 is a perspective view of a particularly preferred embodiment of a stand according to the invention for a speaker,

2 shows a section through the base of FIG. 1,

3 a support foot, in particular for a stand of FIG. 1, partially cut,

4 is a perspective view of another support foot and

Fig. 5 shows the base of Fig. 1 in conjunction with the support foot of Fig. 3 in a perspective view.

The stand according to the invention shown in Fig. 1 in a perspective view and in Fig. 2 in section is characterized by a lower, of a sound-insulating material, in particular rubber, existing stationary disk 1, at least one mounted on the stationary disk 1, from the stationary disk 1 to

Gestftuysen & Wnftohr

above projecting, small-area spacer element 2, an upper, of a scarf! insulating material, in particular made of rubber, mounted on the spacer element 2 and held at a distance from the stationary disk 1 support disk 3 and one of the stationary disk 1, the spacer element 2 and the support disk 3 formed inner cavity 4. As Fig. 2 clearly shows, is created by the inner cavity 4 between the stationary disc 1 and support plate 3, an area in which transmitted in the base structure-borne noise can swing out as much as possible. In conjunction with the scha 11dämmenden nateriai of stationary disk i and support disk 3 so optimal insulation of structure-borne noise, ie minimizing the transmission of structure-borne noise, achieved.

Fig. 2 can be seen in conjunction with Fig. 1, that it is particularly useful to provide the stationary disk 1 and / or the support plate 3 with a, then preferably respectively centrally disposed opening 5 and 6 respectively. Through the openings it is ensured that the air cushion located in the inner cavity 4 is not included, but is in communication with the ambient air.

Fig. 2 makes a particularly advantageous embodiment of the stand according to the invention is clear, which is characterized in that the stationary disk 1 and / or the support plate 3, in particular the support plate 3, from a plurality of part discs 3a, 3b is composed. On the one hand, uniformly thick materials for stationary disk 1 and support disk 3 can be used on the one hand, and on the other hand the rigidity of the support disk 3 is increased compared to the rigidity of the stationary disk 1, which is necessary to keep the sometimes relatively heavy loudspeaker box above the internal cavity 4 really floating. In addition, a particularly good structure-borne sound insulation can be realized in this way.

For the design of the spacer element 2, there are a variety of ways. The spacer element 2 could, for example, be designed in the shape of a cam or in the manner of a knob, it then being expedient to use a plurality of spacer elements.

Gestftuysen & 'voh * RDhr ""

elements ΐ orgsii 'η w ^ rers. The spacer element 2 could also be formed, for example, on the stationary disk 1. It is essential for the spacer element 2 only that it holds open the inner cavity 4, that is not or not substantially compressed during operation. In that regard, it is recommended in particular, the spacer element 2 as on the outer circumference of the stationary disc 1 circumferential Qistanzring form. This embodiment shows the drawing.

For the material of Distanzslsrssnts 2 kcssnt particular metal, such as chromed brass, in question. Under certain circumstances, but also wood, hard rubber or other material can be used.

The exemplary embodiment recognizable in FIG. 2 is particularly preferred insofar as the spacing element 2 embodied here as a spacer ring has an outer circumferential edge on the underside and the outer side, the inner diameter of which corresponds to the outer diameter of the stationary disk 1 or the support disk 3. In this way, a perfect mutual assignment of the parts of the base is guaranteed.

It is recommended in total that the stationary disk 1, the spacer element 2 and the support plate 3 are firmly connected, insbesoivjere glued or vulcanized, are.

The speaker must be parked in any way on the stand. This can be done by simply resting them flat on top of the support plate 3. However, it is more expedient for the insulation of structure-borne noise if the body-to-body introduction takes place as far as possible from the spacer element 2, ie, in particular in the center of the support disk 3 in the exemplary embodiment shown here. In that regard, it is recommended that on the top of the support plate 3, a preferably centrally arranged support plate 7 is mounted for a support 8. Such a support plate 7 may itself, for example, of a metal, in particular of chromed ~ brass exist. At least you do not need it yourself

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Material to pass. For example, one of the cones shown in FIGS. 3 to 5 can be used as the support foot 8.

Fig. 1 makes it clear that in the illustrated embodiment, the support plate 7 is disposed around the opening 6 around and, preferably, also has an opening 9. Moreover, it is useful for securing the speaker or the supporting foot 8 on the support plate 7, if this, as shown, has a circumferential anti-skid edge 10.

Previously, it has already been indicated that a particularly preferred embodiment of the stand according to the invention is used in combination with a support foot 8. Such a support foot 8 can be a conical support foot 8, as shown in FIGS. 3 to 5. Such support feet belong as feet, as has been explained, for some time to the prior art. It is essential, however, that because of the excellent structure-borne sound insulation of the base according to the invention the support foot 8, as shown in Fig. 3, frusto-conical, with a relatively wide tip can be performed. The structure-borne sound insulation is in this case not realized primarily by the tip design of the support foot 8, but rather by the base constructed in accordance with the invention. 5 shows a compilation of base and support foot 8.

From FIGS. 3 to 5, there are still further preferred embodiments, namely that the support foot 8 has a screw thread on the upper side, preferably an internal thread 11, and / or a slip protection plate 12. The indicated in Figs. 3 and 4 internal thread 11 serves to screw a mating thread on the bottom of the speaker, so that adjusted by simply turning the support foot 8, the height of the speaker and thereby unevenness can be compensated. Although the anti-skid plate 12, which will preferably be made of rubber or a similar material, does not allow height adjustment, but combines a further improved structure-borne sound insulation with a slip protection of the then simply aufzulegenden speaker.