EP0893936A2 - Loudspeaker basket - Google Patents

Abstract

The loudspeaker basket has an upper edge (11), a base (12) and at least one strut (13), which connects the base and upper edge. At least one latching hook (16) connects at least one part of the magnet system (20) to the base, when the magnet system has adopted a desired position on the base of the basket. Each strut is sprung in the direction of the loudspeaker axis (15). The latching hook extends from the upper edge towards the base. The end of each hook faces away from the upper edge and has an angled part with its base side parallel to the base.

Description

Technical field

The invention is concerned with the formation of loudspeaker baskets, in particular with Training of such speaker baskets, in which one in or on the speaker basket attached magnet system is attached by means of locking hooks.

State of the art

According to the prior art, speaker baskets are constructed so that with mutual axial distance in the direction of the loudspeaker axis, there is a base and an upper edge and that the upper edge is connected to the bottom with at least one web. Such an arrangement, which shows a plurality of webs, is for example in DE-A-41 130 17 is shown. In connection with the present application, a Arrangement with a web understood one in which the entire circumference of the Floor with the entire circumference of the upper edge by means of a web Intermediate piece is continuously connected. The latter does not preclude that in being considered an Bridge designated intermediate piece openings are formed, which are present automatically result in multiple webs due to the lateral spacing of these webs.

The bottom of the speaker basket is - as DE-A-41 130 17 shows - with a Magnet system connected. Under a magnet system is in connection with this Registration not only the unit formed from inference parts and the permanent magnet understood, but also the individual parts (yoke parts and permanent magnets), the one form such a magnet system.

The connection of floor and magnet system is diverse in the state of the art Way solved. Known types of connection in this context are gluing Riveting and screwing. Snapping is also occasionally used as a connection technology specified (such as in DE-A-40 31 742), always pointing out that a such connection technology can only be used with particularly light magnet systems. The Reasons which lead to the limited usability of rest connections, are that locking hooks are not able to heavy magnet systems, such as for medium or Connect the woofer permanently to the bottom of the speaker basket. The reason for this is that the tolerance compensation with the magnet system or Parts of the magnet system that come into contact with the edges of the locking hooks are chamfered are formed and thus the locking hooks or their edges are not flat, but only have a linear contact with the magnet system. This linear contact as well as the usual cold flow with plastic snap hooks cause the snap hook connections can loosen or loosen. The latter can only be avoided by that the latched hooks on the magnet system, for example by means of a separate and approximately in EP-A-0538702 can be secured strap, which slipping off Locking hook prevented by the magnet system.

Therefore, the invention has for its object to provide a speaker basket with which a magnet system regardless of the weight of the magnet system as well Tolerance problems can be locked without further security measures for such a locking connection are necessary.

Presentation of the invention

The object is achieved with the features specified in claim 1. Advantageous training and Further developments of the invention can be found in claims 2-8.

If the webs are designed to be resilient in the direction of the loudspeaker axis, there are locking hooks which are connected to the upper edge and extend towards the Extend floor, and have the locking hooks on the end facing away from the end one bend each, the side facing the upper edge parallel to the floor runs, a magnet system with a high weight can be permanently locked only by locking be connected to the speaker basket. This is due to the fact that Magnet system in its end position, despite its snap fastening, always flat between mutually parallel surfaces - the bottom and the side facing the upper edge the respective bend - is arranged.

In particular, according to the invention, there is no need otherwise for a locking hook attachment measures according to the state of the art for tolerance compensation to the Snap hooks, because according to the invention the tolerance compensation solely by the deformation of the Webs are made without this deformation causing the surface contact of the Magnet system or its respective parts to the floor and to the corresponding sides that eliminates bends. In other words, according to the invention, they have Snap hooks or corresponding sides of the bends only the function of a pure Abutment for the force exerted by the deformed webs if a magnet system is arranged between the floor and the bends of the locking hook. This means, that the locking hook according to the invention compared to conventional locking hooks in the direction the loudspeaker axis can be made much more stable because they are used to achieve the target position on the magnet system with tolerance deviations no stretching forces in the direction of Loudspeaker axis.

If the end face of the respective bend is rounded according to claim 2, is the sliding or rebound movement of the locking hooks when moving the magnet system on supports the floor. If necessary, the side of the each locking hook be rounded for the same reasons.

If the webs are designed according to claim 3 or claim 4, it is ensured that due to the curved or kinked course of the webs, this particularly good spring property is achieved without fear that an approximation of the floor to the top edge the flatness of the floor, which in not deformed Condition of the webs is given, is changed.

If the speaker basket is made in one piece, it is a very inexpensive arrangement created.

If means are provided on the loudspeaker basket and / or magnet system according to claim 6, which in the connected state of the magnet system and loudspeaker basket rotates the Preventing magnet systems around the speaker axis will ensure that a later manufactured alignment of a voice coil inserted into the magnet system is not is subsequently changed again.

Is the magnet system and / or the speaker basket according to claim 7 with guide means provided, the magnet system can only in a predetermined position Speaker basket can be connected to this.

The production of a unit from the loudspeaker basket and magnet system is particularly simple when, according to claim 8, the guide means simultaneously form the means which in connected state of the speaker basket and magnet system a rotation of the magnet system exclude around the speaker axis.

If the magnet system is connected to the loudspeaker basket exclusively by means of a catch, there are advantages not only in the connection, but also in the later resolution the connection. So it is possible to separate the magnet system from the speaker basket, without remnants of the speaker basket remaining on the magnet system. To realize this, all that is required is a tool that removes the locking hooks from their target position on the magnet system lever or which separates the locking hooks near the upper edge.

Brief presentation of the figures

Fig. 1

einen Lautsprecherkorb in perspektivischer Ansicht;

Fig. 2

eine Einheit aus Lautsprecherkorb und Magnetsystem; und

Fig. 3

eine Draufsicht auf ein Magnetsystem.

Show it:

Fig. 1

a speaker basket in perspective view;

Fig. 2

a unit consisting of loudspeaker basket and magnet system; and

Fig. 3

a plan view of a magnet system.

Ways of Carrying Out the Invention

In Fig. 1, a speaker basket 10 is shown for a woofer. This Speaker basket 10 is made of an upper edge 11, a bottom 12 and four webs 13.1-4 formed, which the upper edge 11 with the upper edge 11 in axial Connect spaced floor 12. As now closer to the example of the web 13.1 described, each web 13.1-4 is formed by two segments 14.1, 14.2, each Segment 14.1, 14.2 each occupies a different angle to the loudspeaker axis 15. In the present case, this means that the segment 14.1 with the loudspeaker axis 15 acute angle and the segment 14.2 with the speaker axis 15 an obtuse angle includes. This construction of the webs 13.1-4 causes a pressure load when exerted on the floor 12 in the direction of the upper edge 11, the edge 14.3 on which the two webs 14.1, 14.2 are connected to each other, acts as a joint, so that the floor 12 can avoid the pressure load in the direction of the upper edge 11 without the Bottom 12 loses its radial alignment with the speaker axis 15. In other words, by using the webs 13.1-4 shown in Fig. 1 and their resilient effect the bottom 12 acts like a plate spring when the bottom 12 is under pressure.

In addition, four locking hooks 16.1-16.4 are arranged on the upper edge 11, each this locking hook 16.1 is arranged in the space 17 between two webs 13.1, 13.2. As exemplarily explained on the locking hook 16.1, each of these locking hooks 16.1-4 of a trapezoidal base part 18 and a bend 19 are formed. The base part 18 has such a length in the direction of the speaker axis 15 that it from the floor 12th formed level dominates. In addition, the base 18 is still with a reinforcing rib 18 'equipped. The bend 19 is directed towards the speaker axis 15. The closer configuration of the bends 19 will be closer in connection with FIG. 2 are explained.

In Figure 2, a speaker basket 10 is shown for the bass application, which with a Magnet system 20 is connected. The connection between the magnet system 20 and the Speaker basket 10 was realized so that the magnet system 20 in the direction of arrow P1 the speaker basket 10 has been moved. During this movement, the locking hooks 16.1, 16.3 in physical contact with that of the permanent magnet 21 of the magnet system 20 formed first surface 22, the locking hooks 16.1, 16.3 in the direction of arrow P2 and then slide along the lateral surface 23 of the permanent magnet 21. The movement of the Locking hooks 16.1, 16.3 in the direction of arrow P2 and the sliding of the bends 19 of the Snap hooks 16.1, 16.3 on the first surface 22 and the lateral surface 23 are thereby improves that the sides 24 ', 24' 'of the bend 19, which each the upper edge 11th facing away or facing the speaker axis 15, are arcuate. If the magnet system 20 comes into contact with the floor 12 during its movement in the direction of arrow P1 the loudspeaker basket 10 in physical contact, will continue moving in the direction of arrow P1, the webs 13.1 which are of an arched design in this exemplary embodiment, 13.2 elastically deformed. The latter is indicated by the arrows P3. In addition, the Snap hooks 16.1, 16.3 as soon as the magnet system 20 with the floor 12 in physical Contact comes back against the direction of arrow P2. With this spring back movement the Locking hooks 16.1, 16.3 lay the sides 24 of the bends 19, which are the bottom 12 are facing and which also run parallel to the floor 12, on the second Surface 25 of the permanent magnet 21 flat.

To this flat and shown in Figure 2 concerns the sides 24 of the bends 19 to reach, it is obvious that the webs 13.1, 13.2 in any case in the direction of arrow P3 must be elastically deformed, because only by the deformation of the webs 13.1, 13.2 in The direction of the arrow P3 ensures that when the snap hooks 16.1, 16.3 snap back against the direction of arrow P2 and the inevitable arcuate movement of the Locking hooks 16.1, 16.3, the side 24 of the bend 19 in the flat contact mentioned comes to the second surface 25 of the permanent magnet 21. These conditions also apply if Tolerance deviations, for example if the mutual distance between the two surfaces 22, 25 is larger than intended, because of the interaction of the resilient webs 13.1, 13.2 with the locking hooks 16.1, 16.3 is also in this case ensures that the magnet system 20 between two mutually parallel Surfaces - the bottom 12 and the side 24 of the respective bend 19 - clamped and is attached.

3 shows a plan view of a magnet system 20. This representation is clear can be seen that the permanent magnet 21 is provided with grooves 26 on its peripheral edge 30. These grooves 26 have the functions of the locking hooks 16 when connecting the magnet system 20 with the speaker basket 10 and when the locking hook 16 - as in Fig.2 shown - spring back against the direction of arrow P2, through which then partially in the grooves 26 lying base parts 18 of the locking hook 16 mutual rotation excluded from the speaker basket 10 and magnet system 20.

The latter can also be ensured in that the upper pole disk 27 with pins 28 is provided, which emerge perpendicular to the paper plane from this. These cones 28 engage when the loudspeaker basket 10 with the magnet system 20 as in FIG. 2 is locked in openings 29, which in the bottom 12 of the speaker basket 10th are trained. Such openings 29 are indicated in Fig.1.

Claims (8)

Speaker basket 10, with an upper edge 11, a bottom 12 and with at least one web 13, which connects the bottom 12 and the upper edge 11, which are arranged at an axial distance from the loudspeaker axis 15, and with at least one latching hook 16, which connects at least part of a magnet system 20 to the floor 12 when the magnet system 20 has assumed its desired position on the floor 12 of the speaker basket 10,
characterized, that each of the webs 13 is resilient in the direction of the loudspeaker axis 15, that the latching hooks 16 extend from the upper edge 11 and extend in the direction of the floor 12, and that the end of each latching hook 16 facing away from the upper edge 11 has an angled portion 19, one side 24 facing the base 12 of which extends parallel to the base 12. Loudspeaker basket according to claim 1,
characterized, that the bend 19 has a side facing the speaker axis 15 24 'and that at least this side 24 'is rounded. A loudspeaker according to claim 1 or claim 2,
characterized, that the web or webs 13 are arched. Loudspeaker basket according to claim 1 or claim 2,
characterized, that the respective web 13 in the direction of the loudspeaker axis 15 is divided into at least two segments 14.1, 14.2, two segments 14.1, 14.2 forming a web 13 each having a different angle to the loudspeaker axis 15. Loudspeaker basket according to one of Claims 1-4,
characterized, that the speaker basket 10 is integrally formed. Loudspeaker according to one of claims 1-5,
characterized, that means 28, 29 are provided on the loudspeaker basket 10 and / or the magnet system 20 which, when the magnet system 20 and loudspeaker basket 10 are connected, preclude rotation of the magnet system 20 about the loudspeaker axis 15. Loudspeaker basket according to claim 6,
characterized, that guide means 26 are provided on the loudspeaker basket 10 and / or on the magnet system 20, which allow the magnet system 20 to be connected to the loudspeaker basket 10 only in permissible positions between the loudspeaker basket 10 and the magnet system 20. Loudspeaker basket according to claim 7,
characterized, that the guide means 26 also form the means 28, 29 which, when the magnet system 20 and the loudspeaker basket 10 are connected, preclude rotation of the magnet system 20 about the loudspeaker axis 15.

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