Abstract
The present invention relates to a speaker box (1) having a speaker housing (2) and a speaker (3). The speaker (3) has a speaker chassis (4) having a flange ring (5) on the front side (6) of the speaker (3), and a magnet head (8) on the rear side (7), opposite the flange ring (5), of the speaker (3). The speaker (3) is attached, by way of its flange ring (5), to a metal plate (9) that at least partly covers the speaker housing (2) at the front. For simpler and more effective self-cooling, a section connected to the flange ring (5) and made from metal projects into the speaker housing (2) and forms a channel wall (10) of an air channel (11).
Claims
1. A speaker box, comprising: a speaker housing; a speaker, wherein the speaker has a speaker chassis having a flange ring on an output side of the speaker and a magnet head on a rear side of the speaker opposite the flange ring; a specific component formed from a metal plate, the specific component comprising a housing part which is connected to the flange ring and an end section that is bent to project into the speaker housing and forms a first channel wall of an air channel, said specific component being connected to the speaker housing, wherein the air channel is configured to promote convective heat loss from an interior of the speaker housing to an exterior of the speaker housing, and wherein the end section of the metal plate is configured to conductively transfer heat from the interior of the speaker housing to the housing part, and the housing part is configured to transfer heat to the exterior of the speaker housing.
2. The speaker box according to claim 1 further comprising a hollow tubular part molded onto the housing part forming an additional air channel.
3. The speaker box according to claim 1 wherein the metal plate is bent to project into the speaker housing from a plane of the housing part next to and on different sides of the flange ring of the speaker and forms the first channel wall of the air channel and a second channel wall of an additional air channel, the second channel wall opposing the first channel wall.
4. The speaker box according to claim 1 further comprising an electronics unit for driving the speaker arranged on the first channel wall in the interior of the speaker housing.
5. The speaker box according to claim 4 wherein the electronics unit for driving the speaker is arranged in the air channel defined by the first channel wall.
6. The speaker box according to claim 1 wherein the speaker is designed to generate sound signals outside an audible spectrum.
7. The speaker box according to claim 1 further comprising cooling fins arranged on the first channel wall.
8. The speaker box according to claim 1 wherein the air channel has a fin structure that increases the surface of the first channel wall.
9. The speaker box according to claim 1 wherein the first channel wall is bent in a meandering shape.
10. The speaker box according to claim 9, wherein the meandering shape includes bends of the first channel wall formed with a cross section transverse to an airflow direction, seen from the speaker housing into a surrounding atmosphere.
11. The speaker box according to claim 1 wherein the air channel has a cross section that changes from an interior region towards an exit region.
12. The speaker box according to claim 1 wherein the speaker is a bass reflex speaker, a bandpass speaker, or a horn speaker.
13. The speaker box according to claim 1 wherein the housing part and the speaker chassis are made from aluminum.
14. The speaker box according to claim 1 wherein the speaker housing has a plurality of additional speakers.
15. The speaker box according to claim 1 wherein the air channel has a first opening to the exterior of the speaker housing and a second opening to an interior space of the speaker housing in which the speaker is situated, wherein an unimpeded line of sight exists from the first opening to the second opening.
16. A speaker, comprising: a speaker chassis that has a flange ring on an output side of the speaker, said flange ring having a first diameter, and a magnet head on a rear side of the speaker opposite the flange ring, said magnet ring having a second diameter smaller than the first diameter of the flange ring, wherein the flange ring has air channels which extends obliquely from the flange ring at the first diameter to at least the magnet head at the second diameter, wherein the air channels have surrounding channel walls, and wherein the channel walls cling to the speaker chassis or are formed integrally with sections of the speaker chassis extending from the flange ring to at least the magnet head, thus allowing heat to be dissipated through the air channels having the associated channel walls made from metal.
17. The speaker according to claim 16, wherein the air channels includes a plurality of air channels which are distributed at four corners of the flange ring.
18. A speaker box, comprising: a speaker housing; a speaker comprising a flange ring on an output side of the speaker and a magnet head on a rear side of the speaker opposite the flange ring; a bent metal plate comprising a first part that is an exterior surface of the speaker housing and a second part that projects into the speaker housing beyond a plane of the speaker defined by a bottom of the magnet head, wherein the first and second parts are to either side of a bend in the bent metal plate, wherein the flange ring of the speaker is connected to the first part of the bent metal plate; an air channel formed by the second part of the bent metal plate and a wall of the speaker housing spaced apart from the second part, wherein the second part of the bent metal plate is between the wall and the speaker, wherein the bent metal plate is a reflection wall to the speaker, wherein an unimpeded line of sight exists from the magnet head to a terminal end of the second part of the bend plate furthest from the bend, wherein the air channel is configured to promote convective heat loss from an interior of the speaker housing to an exterior of the speaker housing, and wherein the second part of the bent metal plate is configured to conductively transfer heat from the interior of the speaker housing to the first part of the bent metal plate, and the first part is configured to transfer heat to the exterior of the speaker housing.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The invention will be explained in more detail below on the basis of exemplary embodiments along with the attached drawings. In each case schematically:
(2) FIG. 1 shows a lateral sectional view of one embodiment of a speaker box having a speaker;
(3) FIG. 2 shows a lateral sectional view of a further embodiment of the speaker box having a speaker;
(4) FIG. 3 shows a lateral sectional view of a further embodiment of the speaker box having a speaker;
(5) FIG. 4 shows a lateral sectional view of a further embodiment of the speaker box having a speaker and an electronics unit;
(6) FIG. 5 shows a lateral sectional view of a further embodiment of the speaker box having a speaker and an electronics unit;
(7) FIG. 6 shows a front view of a further embodiment of the speaker box having a speaker and an electronics unit;
(8) FIG. 7 shows a lateral sectional view of a further embodiment of the speaker box having a speaker;
(9) FIG. 8 shows a front view of the embodiment, shown in FIG. 7, of the speaker box having a speaker;
(10) FIG. 9 shows a lateral sectional view of a further embodiment of the speaker box having a speaker;
(11) FIG. 10 shows a front view of the embodiment, shown in FIG. 9, of the speaker box having a speaker;
(12) FIG. 11 shows a lateral sectional view of a further embodiment of the speaker box having a plurality of speakers;
(13) FIG. 12 shows a front view of the embodiment, shown in FIG. 6, of the speaker box having a plurality of speakers;
(14) FIG. 13 shows a lateral sectional view of a further embodiment of the speaker box having a plurality of speakers;
(15) FIG. 14 shows a lateral sectional view of a further embodiment of the speaker box having a plurality of speakers;
(16) FIG. 15 shows a plan view of one embodiment of a speaker having integral air channels in the flange ring;
(17) FIG. 16 shows a lateral sectional view of the speaker from FIG. 15;
(18) FIG. 17 shows a lateral sectional view of a further embodiment of the speaker box having a speaker having integral air channels in the flange ring;
(19) FIG. 18 shows a lateral sectional view of the speaker, shown in FIG. 17, having integral air channels in the flange ring;
(20) FIG. 19 shows a perspective view of the speaker from FIG. 18.
DETAILED DESCRIPTION
(21) FIG. 1 shows a sectional view of the speaker box 1 according to the invention having a speaker housing 2 and a speaker 3. Further components usually present in a speaker box 1, such as for example electrical cables, drive units or mechanical attachment means, are not illustrated for the sake of clarity. The speaker 3 has a speaker chassis 4 in the form of a cage that supports the speaker diaphragm. The speaker 3 has a flange ring 5 for the attachment of the speaker 3 on an output side 6 of the speaker 3. The speaker 3 has a magnet head 8 on a rear side 7, opposite the flange ring 5, of the speaker 3. On the front side of the speaker housing 2 that is assigned to the output side 6 of the speaker 3, there is provided a housing part 9 made from metal that is connected to the speaker housing 2 and is attached to the speaker 3 via the flange ring 5. The speaker housing 2 in the present case is designed with a U-shape cross section and, together with the housing part 9, forms a substantially cuboidal housing. Other housing shapes, for example rounded ones, are however also conceivable for the speaker housing 2.
(22) The housing part 9 is formed as a metal plate in the drawings. The housing part 9 is bent into the interior 13 of the speaker housing 2 in a region to the side of the speaker 3. That section of the housing part 9 projecting into the interior 13 forms a channel wall 10 of an air channel 11. The one-piece form of the channel wall 10 with the housing part 9 allows an air channel 11 that is particularly easy to produce and an optimum transfer of heat not only through the airflows 19 escaping from the speaker housing 2 through the air channel 11, but also via the adjoining housing part 9. In principle, however, a formation of a housing subsection that is not in one piece is also possible, in which for example that part of the housing part 9 forming the channel wall 10 is produced specially and is screwed to the housing part 9, for example using brackets. The air channel 11 forms an opening in the speaker housing 2 and allows air to be exchanged between the interior 13 of the speaker housing 2 and the surrounding atmosphere 16 surrounding the speaker housing 2.
(23) During operation of the speaker 3, the speaker 3 heats up, in particular in the region of its voice coil, not illustrated. The heat is able to leave the speaker housing 2 firstly via the speaker 3 itself and the adjoining housing part 9 and secondly by convection through heat dissipation to the air surrounding the speaker 3. The diaphragm movement of the speaker 3 caused by applied signals generates air movements that promote the formation of airflows 19 that leave the speaker housing 2 via the air channel 11. As a result, the cooling of the interior 13 of the speaker housing 2 and thus also of the speaker 3 is improved. Due to the relatively strong air movements in the case of increased signal amplitude, which also leads to increased heating of the speaker 3, a stronger airflow 19 is also generated, and the cooling effect is increased. Dynamic self-cooling of the speaker box 1 is thus provided. The airflow direction of the airflows 19 normally runs in the air channel 11 from the interior 13 in the direction of the surrounding atmosphere 16, as illustrated by the arrow. Different airflow directions may however occur in the case of an air circulation that possibly arises in the case of at least two air channels 11, in which cool air from the surrounding atmosphere 16 enters the speaker box 1 and heated air from the interior 13 leaves via another air channel 11.
(24) The housing part 9 made from metal has a high thermal conductivity. This therefore already leads to improved heat dissipation at the speaker 3 itself, which is attached to the housing part 9 via the flange ring 5. By virtue of forming the channel wall 10 for the air channel 11, faster cooling of the airflow 19 along the air channel 11 also takes place, since part of the heat is output from the airflow 19 to the housing part 9 and leaves the speaker housing 2 thereby.
(25) In the exemplary embodiment, the housing part 9 is an aluminum plate that is able to be processed easily due to the material properties of aluminum, for example is able to be bent sectionally into the channel wall 10, has a low weight and is distinguished in particular by a particularly high thermal conductivity.
(26) The interior 13 of the speaker box 1 is not only a reception space for the components of the speaker box 1, but also performs important acoustic functions for the sound quality of the speaker 3. The interior 13 in principle forms a resonance chamber for amplifying the sound waves output by the speaker 3. The interior 13 may furthermore form a bass reflex chamber that reflects sound waves of the speaker 3 radiated toward the rear in a targeted manner and thereby advantageously supplements the sound pattern of the speaker 3. The present structure allows the speaker box 1 to be cooled via an air channel 11 without the interior 13 and thus the resonance or bass reflex chamber being disadvantageously influenced. This is achieved by way of the channel wall 10 projecting from the housing part 9, which channel wall 10 forms a substitute reflection wall and allows the interior 13 to be screened in part from the air channel 11.
(27) FIG. 1 shows an embodiment in which the channel wall 10 projects beyond the plane 12 of the speaker 3 defined by the bottom of the magnet head 8 of the speaker 3 and into the speaker housing 2. As a result, not only are the abovementioned advantages of improved acoustics achieved through the formation of a substitute reflection wall, but sufficient optical concealment of the inside of the housing is also achieved. This prevents an observer from looking directly through the air channel 11 at the speaker 3 and the associated electronics.
(28) The length L of the channel wall 10 that is formed by that section of the housing part 9 projecting into the speaker housing 2 is additionally greater than the height H of the speaker 3 as defined from the flange ring 5 to the bottom of the magnet head 8. As a result, the air channel 11, as may be seen in the figure, is comparatively long or takes up almost the entire length of the speaker housing 2. The airflow 19 is thus sufficiently directed and sped up within the air channel 11, such that the transfer of heat to the surrounding atmosphere 16 is improved.
(29) Embodiments of the air channel 11 that have a length shorter than the height H are in principle however also conceivable.
(30) The embodiment shown in FIG. 2 differs from the embodiment illustrated in FIG. 1 essentially in that the housing part 9 is not arranged between the flange ring 5 and the speaker chassis 4, as shown in FIG. 1, but the flange ring 5 in FIG. 2 directly adjoins the speaker chassis 4 and is connected at the end face to the housing part 9. In the region of the speaker opening on the output side 6 of the speaker 3, the housing part 9 has a recess in order not to impair the operation of the speaker 3. The embodiment shown in FIG. 2 allows a more attractive appearance of the speaker box 1, in the present case of the front side of the speaker box 1, since the flange ring does not protrude out of the plane of the housing part 9. Instead of this, the speaker 3, including the flange ring 5, is recessed into the speaker housing 2. The flange ring 5 is thus attached to the housing part 9 on an inner side, facing the interior 13, of said housing part.
(31) The embodiment shown in FIG. 3 differs from the embodiment shown in FIG. 1 in that the housing part 9 is bent into the interior 13 at two opposing ends and thus forms channel walls 10 for two opposing air channels 11. The amount of heated air that is able to leave the speaker housing 2 per unit of time is thereby increased significantly. As well as this, it is conceivable to form an air circulation in which cool air enters through one of the two air channels 11 and heated air exits through the other air channel 11.
(32) FIG. 4 essentially shows a speaker box 1 having the features described with regard to FIG. 1. In this embodiment, however, an electronics unit 14 for driving the speaker 3 is additionally arranged on the housing part 9, specifically on the channel wall 10 in the interior 13 of the speaker housing 2. As shown in the drawing, this may be arranged on a side, facing away from the air channel 11, of the channel wall 10. An arrangement of the electronics unit 14 on a side, facing the air channel 11, of the housing part 9 is in principle however also conceivable. The heat generated by the electronics unit 14 is not only dissipated by convection through air movements and the airflows 19, but also in particular via the directly adjoining housing part 9 that has a high thermal conductivity. If the housing part 9 or the channel wall 10 serves as support for the electronics unit 14, it is additionally not necessary to arrange any other carrier structures for the electronics unit 14 that could negatively influence the acoustic properties of the interior 13 in the interior 13.
(33) The acoustics of the speaker box 1 are improved further when the electronics unit 14 is arranged in the air channel 11, as in the embodiment shown according to FIG. 5. The resonance or bass reflex chamber is thereby kept free on the rear side 7 of the speaker 3. By virtue of the airflows 19 channeled in the air channel 11, the electronics unit 14 is cooled sufficiently by convection and does not require any additional active cooling units such as blowers for example.
(34) FIG. 6 shows one embodiment in a front view of the speaker box 1, in which the electronics unit 14 is placed on the front side between the air channel 11 and the speaker 3, adjoining the housing part 9. This arrangement achieves a particularly high cooling efficiency for the electronics unit 14, since it firstly adjoins the housing part 9 made from metal and having a high thermal conductivity, secondly is cooled by the airflows 19 escaping from the air channel 11 and, as well as this, is in direct contact with the surrounding atmosphere 16 at the front side of the speaker housing 2. A display or interface for optical communication with a user may furthermore be provided on the electronics unit 14, since the electronics unit 14 in this embodiment is not concealed by housing parts and is also optically visible from different angles.
(35) In FIG. 6, the housing part 9 is arranged on a front side, assigned to the output side 6 of the speaker 3, of the speaker housing 2. It is possible to see that section of the housing part 9 that is arranged in this case at the front and also the flange ring 5, attached to the housing part 9, on the output side 6 of the speaker 3. The air channel 11 is arranged to the side of the housing part 9 or of the speaker 3 and forms a visible opening within the speaker housing 2. According to one advantageous refinement, the air channel 11 has a fin structure 15 that increases the surface of the channel wall 10 in order to further increase the cooling effect.
(36) FIGS. 7 and 8 show a further embodiment of the speaker box 1 in which a hollow part 20 is molded onto the housing part 9. FIG. 7 shows a sectional side view, whereas FIG. 8 shows a front view of the front side of the speaker box 1. The hollow part 20 in FIGS. 7 and 8 is formed as a tube open on both sides with a round cross section and projects from the housing part 9 into the inside of the speaker housing 2. In this case, the hollow part 20 forms the channel walls 10 of the air channel 11, such that a tubular air channel 11 is provided in the present case. A particularly favorable, in particular low-noise airflow 19 is routed through the air channel 11 as a result of the cylindrical channel shape. In the same way as FIG. 2, the flange ring 5 is located in a plane that is offset in the direction of the interior 13 with respect to the plane of the housing part 9 in order to recess the speaker 3 into the speaker housing 2. The flange ring 5 is thus attached to the housing part 9 on an inner side, facing the interior 13, of said housing part.
(37) FIGS. 9 and 10 show a further embodiment of the speaker box 1 in which a hollow part 20 is molded onto the housing part 9. FIG. 9 shows a sectional side view, whereas FIG. 10 shows a front view of the front side of the speaker box 1. The hollow part 20 in FIGS. 9 and 10 is formed as a tube with fins that is open on both sides with a rectangular cross section and projects from the housing part 9 into the inside of the speaker housing 2. In this case, the hollow part 20 forms the channel walls 10 of the air channel 11, such that a tubular air channel 11 is provided in the present case. A particularly high cooling effect through the cooling channel 11 is achieved by the fin structure 15 on the channel walls 10.
(38) FIGS. 11 to 14 show embodiments of the speaker box 1 having a plurality of speakers 3.
(39) FIG. 11 shows, by way of example, one embodiment of an elongate speaker box 1 having two rows of in each case three speakers 3 arranged next to one another. The speakers 3 of a respective row are connected to one another by a common housing part 9, wherein the housing part 9 has sections protruding into the interior 13 at two opposing ends and that each form an air channel 11 adjoining a channel wall 10. As illustrated, this results in a total of three air channels 11 that serve to channel heat out of the interior 13 of the speaker box 1 via airflows 19. In addition, heat generated by the speakers 3 is output directly to the housing parts 9, thereby forming overall a cooling concept that takes effect in several ways.
(40) FIG. 12 illustrates the arrangement from FIG. 11 again in a front view that shows the two rows of speakers with the adjoining air channels 11 from the front perspective.
(41) FIG. 13 shows an embodiment with five speakers 3 arranged in a row in a sectional view. The row of speakers consists of three woofers 17 and two tweeters 18. All of the speakers 3 are connected to one another by a common housing part 9, wherein the housing part 9 has sections protruding into the interior 13 at two opposing ends and that each form an air channel 11 adjoining a channel wall 10. As illustrated, this results in a total of two air channels 11 that serve to channel heat out of the interior 13 of the speaker box 1 via airflows 19. In addition, heat generated by the speakers 3 is output directly to the housing part 9, thereby forming overall a cooling concept that takes effect in several ways.
(42) The tweeters 18, just like the woofers 17, may be connected to the housing part 9 via flange rings. Other attachment options, such as for example clamping or adhesively bonding into an opening of the housing part 9, however also come into consideration for allowing the tweeters 18 to terminate flush with the housing part 9. When signals are applied, the tweeters 18 generate only very little diaphragm travel, and therefore also only little to no measurable air movement. In the present arrangement, however, they are cooled jointly by the airflows 19 generated by the woofers 17 in addition to the transfer of heat via the housing part 9, such that the cooling effect acts on all of the speakers 3 contained in the speaker box 1.
(43) FIG. 14 shows a speaker box 1 having three speakers 3 which, in contract to the arrangements shown in FIGS. 11 to 13, are not arranged in a plane, but rather placed at an angle to one another. The speaker box 1 has two woofers 17 and a tweeter 18 between them. The speakers 3 are connected to one another via a common housing part 9. For this purpose, the housing part 9 is bent multiple times in order to allow the speakers 3 to be set at different angles to one another and in order to form two opposing channel walls 10 for adjoining cooling channels 11. In this embodiment too, the tweeter 18 is cooled by way of a transfer of heat via the housing part 9 and by convection through the airflows 19 generated by the woofers 17. The channel walls 10 furthermore protrude into the interior 13 of the speaker housing 2, thereby forming a cross section of the air channels 11 that narrows from the interior 13 towards the exit region into the surrounding atmosphere 16. This tapering of the air channels 11 speeds up the airflows 19 in the direction of the surrounding atmosphere 16, giving rise to a certain suction effect and supporting the cooling.
(44) FIG. 15 shows a plan view of a bass reflex speaker 3 that has air channels arranged in a manner distributed over the circumference on its flange ring 5. These are arranged for example at the four corners of the flange ring 5, which had a square outer profile, and is formed integrally with the flange ring 5 made from metal. The air channels 11 are defined by channel walls 10 that form a circular segment-shaped or crescent-shaped cross section. Other cross-sectional surfaces are also however conceivable. The air channels 11 emerge at the output side of the speaker 3, that is to say the sound emission side, as visible in FIG. 15.
(45) FIG. 16 shows a lateral sectional view of the speaker 3 from FIG. 15. It is able to be seen that the air channels 11 extend from the plane of the flange ring 5 in the direction of the rear magnet head 8 or the plane spanned by the magnet head 8. By way of example, the channel walls 10 of the air channels 11 run approximately parallel along the speaker chassis 4, such that the air channels 11 run obliquely from the flange ring 5 to the magnet head 8. They may end before the magnet head 8, as illustrated, or be continued further towards the rear end of the magnet head 8 or beyond.
(46) FIG. 17 shows a lateral sectional view of a speaker housing 2 with a speaker 3 inserted at the front. In this case too, heat is dissipated not though the front housing part of the speaker housing 2, but rather through the air channels 11, formed integrally with the flange ring 5, having the associated channel walls 10 made from metal. In this exemplary embodiment, these are continued almost to the end of the magnet head 8 and angled at the magnet head 8, such that the air channels 11 first of all run diagonally from the output side and parallel to one another in the region of the magnet head 8.
(47) FIG. 18 shows a lateral sectional view of a DAC speaker 3, in which the air channels 11 already end before the magnet head 8. The length, the cross section and the direction of extent, with any changes of direction, may be selected depending on the desired bass reflex properties.
(48) FIG. 19 shows a perspective view of the DAC speaker 3 from FIG. 18. It is able to be seen that the channel walls 10 of the air channels 11 emerge at the four corners of the flange ring 5 and are directed diagonally inwards towards the plane spanned by the magnet head 8. The air channels 11 then meet at a virtual common point of intersection that lies behind the magnet head 8 as seen from the flange ring 5 towards the magnet head 8. The channel walls 10 may in this case cling to the speaker chassis 4 or be formed integrally with those sections of the speaker chassis 4 extending from the flange ring 5 towards the magnet head 8.
LIST OF REFERENCE SIGNS
(49) 1 Speaker box
(50) 2 Speaker housing
(51) 3 Speaker
(52) 4 Speaker chassis
(53) 5 Flange ring
(54) 6 Output side (speaker)
(55) 7 Rear side (speaker)
(56) 8 Magnet head
(57) 9 Housing part
(58) 10 Channel wall
(59) 11 Air channel
(60) 12 Plane (bottom of magnet head)
(61) 13 Interior
(62) 14 Electronics unit
(63) 15 Fin structure
(64) 16 Surrounding atmosphere
(65) 17 Woofer
(66) 18 Tweeter
(67) 19 Airflow
(68) 20 Hollow part
(69) H Height (speaker)
(70) L Length (channel wall)
