EA001014B1 - Electro-magnetic exciter - Google Patents

Abstract

1. An electro-dynamic inertial vibration exciter (1) for exciting a member (2) having capability to sustain and propagate input vibrational energy comprising a motor coil assembly (3,4) having a coil (3) rigidly fixed to a tubular coil former member (4), a magnet assembly (5, 6, 7) disposed concentrically with respect to the motor coil assembly, means (11) suspending the magnet assembly for axial movement relative to the motor coil assembly, and a carrier (9) supporting the motor coil assembly (3,4) and adapted for connection to the member (2) to be excited, characterised by a coupling member (12) adapted to interfit with the magnet assembly (5, 6, 7), and in that the suspension means (11, 23, 24) is connected between the carrier (9) and the coupling member (12). 2. An inertial vibration exciter according to claim 1, characterised in that the carrier (9) is directly connected to the coil former member (4). 3. An inertial vibration exciter according to claim 1 or 2, characterised by means (13) on the coupling member and on the magnet assembly for fixing the coupling member and magnet assembly together. 4. An inertial vibration exciter according to claim 3, wherein the fixing means comprises latch means (13). 5. An inertial vibration exciter according to any preceding claim, wherein the carrier (9) and the suspension means (11, 23, 24) are integral. 6. An inertial vibration exciter according to any preceding claim, characterised in that the coupling member (12) and the suspension means (11, 23, 24) are integral. 7. An inertial vibration exciter according to any preceding claim, characterised in that the suspension (11, 23, 24) is resilient. 8. An inertial vibration exciter according to claim 7, characterised in that the suspension (11,23) is formed as a diaphragm. 9. An inertial vibration exciter according to any one of claims 1 to 7, characterised in that the suspension (24) comprises a set of resilient arms (28). 10. An inertial vibration exciter according to claim 9, when dependent on claim 4, characterised in that the coupling member (12) and the carrier (9) are annular and in that the arms (28) are connected between the coupling member (12) and the carrier (9) to extend circumferentially. 11. An inertial vibration exciter according to claim 10, characterised by a dust seal (10) closing the annular carrier (9). 12. An inertial vibration exciter according to any preceding claim, characterised in that the carrier (9) has a face adapted for contact with the member (2). 13. An inertial vibration exciter according to any preceding claim, characterised in that an axial end (17) of the coil former member (4) is located and mounted in a recess (18) in the carrier (9). 14. An inertial vibration exciter according to any preceding claim, characterised in that the coil (3) is mounted on the outer face of the coil former member (4). 15. An inertial vibration exciter according to any preceding claim, characterised in that the magnet assembly (5,6,7) comprises opposed generally disc-like pole pieces (6,7) sandwiching a magnet (5), the periphery of one (7) of which pole pieces is disposed within and adjacent to the motor coil assembly (3,4), and the periphery of the other (6) of which pole pieces is formed with a downturned flange (8) arranged to lie adjacent to and to surround the motor coil assembly (3,4) to form a coil receiving gap (20). 16. An inertial vibration exciter according to claim 15, characterised in that the flange (8) is adapted to interfit with the coupling member (12). 17. An inertial vibration exciter according to claim 10; characterised by a lip (22) on the flange (8), which lip is shaped to interfit with the coupling member (12), and by fixing means (13) on the coupling member and is adapted to engage the lip (22). 18. An inertial vibration exciter according to any preceding claim, characterised in that the suspension (24) comprises an axially spaced pair of suspension components (28) which are formed integrally one with the other. 19. An inertial vibration exciter according to claim 18, characterised in that the axially spaced pair of suspension components (28) are moulded integrally with the coil carrier (9) and with a coupling member (12) for engaging and supporting the magnet assembly. 20. An inertial vibration exciter according to claim 19, characterised in that the suspension components (28) comprise respective sets of resilient arms (28) each of which is associated with a respective coupling member (12). 21. A loudspeaker comprising an inertial vibration exciter as claimed in any preceding claim.

Description

The invention relates to an electrodynamic exciter intended, for example, for use when activating a loudspeaker with an emitter in the form of a resonating panel described in the international patent application HUO 97/09842 of September 2, 1996, which is undergoing simultaneous consideration.

State of the art

More specifically, the present invention provides an electrodynamic inertial vibration exciter, for example, of the general form described in international patent application XVO 97/09859 of September 2, 1996, which describes an inertial vibration exciter containing a motor coil assembly having a coil rigidly attached to the tubular frame of the coil, a magnet assembly, concentrically located relative to the motor coil assembly and forming an inertial mass, and an elastic means supporting the magnet assembly for axial per displacements with respect to the motor coil assembly, the tubular member is adapted for rigid attachment directly to the member to be vibration, for example, a dynamic resonating plate, the adhesive means.

The present invention relates to an efficient construction of pathogens and production methods for the manufacture of such pathogens.

SUMMARY OF THE INVENTION

According to the invention, an electrodynamic inertial vibration exciter for exciting an element having the ability to transfer and distribute input vibrational energy, comprising a motor coil assembly, a coil rigidly attached to the coil frame element, a magnet assembly concentrically relative to the motor coil assembly, and means for suspending the magnet assembly for axial movement relative to the node of the motor coil, characterized in that it contains a supporting element supporting a motor coil assembly and adapted to communicate with an element to be excited. The supporting element can be directly connected to the coil frame element. The suspension means may be connected to the supporting element. The coupling element may be connected to the carrier element through the suspension element, the coupling element being adapted to carry a magnet assembly.

The communication element and the magnet assembly can be adapted to mate with each other, moreover, for securing the communication element and the magnet assembly to each other, means can be provided on the communication element and on the magnet assembly. The attachment means may comprise latch means. The supporting element and the suspension element can be made as a whole. The communication element and the suspension element can be made as a whole. Suspension may be resilient. The pendant may be in the form of a diaphragm. Alternatively, the suspension may comprise a set of elastic shoulders. The communication element and the supporting element can be ring-shaped, and shoulders can be connected between the communication element and the supporting element so that they extend around the circumference.

The supporting element may have a front surface adapted for contact with the resonating element and adapted for mounting on it, for example, using an adhesive substance or fastening devices. The supporting element can be formed integrally with a flange adapted for attachment to the resonating element. The flange can be disk-shaped and adapted to support the pathogen in the cavity in the resonating element using the end portion of the flange. The disc may be adapted to close the cavity.

The end of the coil frame element may be located and secured in a cutout in the carrier element. The coil can be mounted on the outer face of the coil frame member.

The magnet assembly may contain opposing, as a rule, disk-shaped pole pieces with a magnet enclosed between them, the edge of one of these pole pieces located inside and adjacent to the motor coil unit, and the edge of the other pole piece made with a flange protruding upward passing near the motor assembly coils and around it. The flange can be adapted to interface with the communication element. The flange may be formed with a protrusion, the protrusion being adapted to mate with the coupling element, and the fastening means on the coupling element may be adapted to engage with the protrusion. In order to close the annular support element of the coil, a dust seal can be provided.

The means for suspending the magnet assembly for axial movement relative to the motor coil assembly may comprise a pair of axially spaced suspension parts or parts to facilitate axial direction of the voice coil relative to the motor coil assembly. Parts of the suspension may have any desired shape, for example, they may contain appropriate sets of elastic shoulders. The corresponding outer ends of the elastic arms in each part of the suspension can be connected between the struts, the lower ends of which form legs adapted for contact with the resonating element.

The inner ends of the shoulders can carry the corresponding annular communication elements adapted for mounting the magnet assembly.

In accordance with another aspect of the invention, is a loudspeaker comprising the inertial vibration exciter described above.

List of drawings

The invention is schematically illustrated as an example with the accompanying drawings, in which:

FIG. 1 is a side cross-sectional view of a first embodiment of an inertial electrodynamic oscillator in accordance with the present invention;

FIG. 2 is an exploded cross-sectional side view of FIG. 1 embodiment;

FIG. 3 is an enlarged partial cross-sectional side view of FIG. 1 embodiment;

FIG. 4 is a plan view of a suspension component in FIG. 1 embodiment;

FIG. 5 is a plan view similar to that of FIG. 4 of a modified shape of the suspension part for use in the embodiment of FIG. 1 embodiment;

FIG. 6 is a plan view similar to that of FIG. 4, an additionally modified shape of the suspension part for use in the pathogen of FIG. 1 species;

FIG. 7 is an embodiment of an inertial electrodynamic oscillation pathogen adapted to be inserted into a resonating element to be excited;

FIG. 8 is a plan view of a suspension part, generally similar to that shown in FIG. 4 for the one shown in FIG. 7 pathogens;

FIG. 9 is a perspective view of a modified form of a suspension part for a pathogen of the type shown generally in FIG. one;

FIG. 10 is a side view of the suspension part of FIG. 9 with a cross section taken along line Υ-Υ in FIG. 11 and FIG. 11 is a cross-sectional top view taken along line XX of FIG. 10.

In FIG. 1-4, a first embodiment of an electrodynamic inertial exciter (1) of the general oscillation described in international patent application XV O 97/09859 is shown, for example, to excite bending vibrations in a resonating element (2), for example, an element in the form of a panel described in the international patent application XVO 97/09842 for the formation of a loudspeaker.

Thus, the pathogen (1) contains a node (3,4) of the motor coil and a node (5, 6, 7) of the magnet, forming an inertial mass, adapted to move relative to the node (3, 4) of the motor coil, the pathogen, adapted for mounting by any in a convenient way to the resonant element (2) to be excited in order to communicate the shear wave energy to the resonant element (2) when an electrical signal is applied to it.

The motor coil assembly (3, 4) comprises a voice coil (3), for example, of a wire wound around the tube frame (4) of the coil, the lower end (17) of which is supported, as can be seen in FIG. 1, in an annular groove (18) in an annular bearing element (9) of a coil forming a leg, by means of which a motor coil assembly is fastened, for example, with glue or the like, to the front surface of the resonating panel (2). Alternatively, the coil support element can be attached to the resonating element (2) using fastening means, for example, clamps. Such clamps may be detachable. Thus, it is possible to provide a bayonet connector, one part of which is attached to the resonating element, and the other part is formed as a whole with the pathogen. The frame (4) of the coil can be fixed in the groove (18) with glue.

The motor coil assembly (3, 4) is surrounded by an annular coupling element (12), which is connected to the supporting element (9) of the motor coil assembly by an elastic annular suspension diaphragm (11), for example, of a rubber-like material formed with a concentric annular corrugation (19 ), to facilitate axial movement of the communication element relative to the supporting element. The carrier element (9) and the coupling element (1 2) can be made of hard plastic, and they can be molded together with an elastic diaphragm (11) to form an integrated part or suspension assembly. The inner part of the annular bearing element (9) is closed by a disk (10), for example, of foam plastic, in order to ensure that the inner part of the pathogen is covered with a dust seal.

The magnet assembly (5, 6, 7) contains a disk-shaped magnet (5), enclosed between opposite pole pieces (6, 7), one (7) of which has a disk-shaped shape and has the same length with a magnet (5), and the other (6 ) of which it is similar to a bowl and is made with a downward curved flange (8) surrounding the magnet (5) and the pole piece (7), forming an annular gap (20) for the location of the voice coil (3). The free end of the flange (8) is formed in the form of a protruding outward protrusion (22), which is made with an annular recess (21) at its outer end, to form a socket into which the communication element (1 2) can fit tightly like a butt joint for firmly holding together the magnet assembly and the motor coil assembly. The snap clips (13) on the coupling member (12) engage the protrusion (22), preventing separation.

The coupling element (12) is formed with a pair of terminal tabs (14) carrying electrical leads (15) (see FIG. 3), which are electrically connected to the voice coil (3) through the wires or ends (16) of the coil, whereby the coil can be connected with the signal source and thereby activate it.

In FIG. 5 shows a modified form of a part or suspension assembly for a pathogen, as described with reference to FIG. 1 to 4, in which the elastic diaphragm (11) of FIG. 4 is replaced by a relatively rigid diaphragm (2) made of a fabric impregnated with a plastic material, for example, epoxy resin. The diaphragm (23) is formed as a whole with the coupling element (12) and the supporting element (9) of the coil, for example, injection molding of the elements (9) and (12) in the diaphragm.

In FIG. 6 shows an alternative form of a part or suspension assembly for a pathogen, described with reference to FIG. 1 -4, in which the bearing element (9) of the coil, the element (12) of the connection and the elastic suspension (28) between them is formed as a whole using the ring-shaped element (24) of the spring plastic material by making the ring-shaped element with peripheral slots (25 ) passing partially around the annular element, dividing the element into the outer part (26), which forms the coupling element (12), and the inner part (27), which forms the coil support (9), the inner and outer parts being separated and connected by an elastic suspension formed with a collection of three arms (28) defined by slots (25), and these arms extend around the circumference of the element (24), and their outer ends (29) are connected to the outer part (26), and the inner ends (30) of these arms are connected to inner part (27). Thus, the suspension acts by bending the elastic shoulders.

In FIG. 7-8 shows a device in which the pathogen (1) described above is inserted into a cavity (31) in a resonant panel element (2). In this case, the supporting element (9) is formed as a whole with the outwardly disk-shaped flange (32), with which the pathogen is mounted in a recess (33) surrounding the cavity in the front surface (34) of the element (2), whereby the cavity is closed.

In FIG. 9-11 show a general pathogen, as shown in FIG. 1-3, in which the modified form of the part or suspension assembly of FIG. 6. In this case, the suspension part consists of two sets of elastic arms (28) spaced apart from each other in the axial direction, further improving the direction of the magnet assembly (5, 6, 7) relative to the motor coil assembly (34). It should be noted that in FIG. Figure 9 shows a magnet assembly removed from a suspension part, with only the pole piece (6) being visible. In addition, for clarity of presentation, the suspension part is shown partially detached from its right side.

The suspension component or assembly contains a single plastic casting forming a supporting element (9), a communication element (12) and corresponding sets of elastic shoulders (28). Element (1 2) communication contains the upper and lower parts, as described more fully below.

Basically, the suspension part comprises an annular bearing element (9) formed with an annular groove (18) for receiving and placing the end (17) of the coil frame (4). A number of connecting rods (35) extend to the outer sides of the fastener, and their outer ends are connected to legs (36), which are adapted to rest on an elastic element (2) (not shown). Legs (36) support the outer ends (29) of the lower set of elastic shoulders (28).

The inner ends (30) of the lower set of elastic shoulders bear a lower annular communication element (12) having an upwardly extending flange (37) adapted to fit snugly and support the lower end of the flange (8) of the pole piece (6) of the general magnet assembly, shown in FIG. 1 and 2.

The legs (36) support the uprights (38) that support the upper suspension element, consisting of an upper set of elastic shoulders (28), supporting the upper annular communication element (12), adapted for tightly gripping the flange (8) of the pole piece ( 6). The upper suspension element is arranged so that the upper ends of the pillars of the support carry the outer ends of the set of shoulders (28), and the inner ends of the shoulders carry the upper ring-shaped communication element. The upper annular coupling element may include clamps (not shown) that snap into place and engage the pole piece (6) to prevent accidental disconnection. Alternatively, the pole piece and suspension can be fastened together using an adhesive.

Industrial applicability

Thus, the invention provides convenient methods for the production of inertial vibration exciters, including the combined suspension nodes formed in the form of plastic castings or joint castings.

Claims (21)

CLAIM 1. An electrodynamic inertial exciter (1) of vibrations for exciting an element (2) having the ability to transfer and propagate input vibrational energy containing a motor coil assembly (3, 4) having a coil (3) rigidly attached to a tubular frame element (4) coils, a magnet assembly (5, 6, 7) located concentrically with respect to the motor coil assembly, means (11) that suspend the magnet assembly for axial movement relative to the motor coil assembly, and a bearing element (9) supporting the motor assembly (3, 4) flax coil and adapted for connection with the element (2) to be excited, characterized in that it contains an element (1 2) connection, adapted to interface with the node (5, 6, 7) of the magnet, and the tool (11, 23, 24) pendants are connected between the supporting element (9) and the communication element (12). 2. The inertial vibration exciter according to claim 1, characterized in that the supporting element (9) is directly connected to the coil frame element (4). 3. The inertial vibration exciter according to claim 1 or 2, characterized in that it comprises means (13) on the communication element and on the magnet assembly for fastening the communication element and the magnet assembly. 4. The inertial vibration exciter according to claim 3, characterized in that the fastening means comprises latch means (13). 5. The inertial vibration exciter according to any one of claims 1 to 4, characterized in that the supporting element (9) and the suspension means (11, 23, 24) are made as a whole. 6. The inertial vibration exciter according to any one of claims 1 to 5, characterized in that the communication element (12) and the suspension means (11, 23, 24) are made as a whole. 7. The inertial pathogen according to any one of paragraphs. 1-6, characterized in that the suspension (11, 23, 24) is elastic. 8. The inertial vibration exciter according to claim 7, characterized in that the suspension (11, 23) is formed in the form of a diaphragm. 9. The inertial pathogen according to any one of paragraphs. 1 -7, characterized in that the suspension (24) contains a set of elastic shoulders (28). 10. The inertial vibration exciter according to claim 9, characterized in that the communication element (1 2) and the bearing element (9) are ring-shaped, and the shoulders (28) are connected between the communication element (12) and the bearing element (9) and pass along circles. 11. The inertial vibration exciter according to claim 1, characterized in that it contains a dust seal (10) covering its annular bearing element (9). 12. The inertial vibration exciter according to any one of claims 1 to 11, characterized in that the supporting element (9) has a front surface adapted for contact with the element (2). 13. The inertial vibration exciter according to any one of claims 1 to 12, characterized in that the axial end (1 7) of the coil frame element (4) is located and fixed in the groove (18) in the carrier element (9). 14. Inertial vibration exciter according to any one of claims 1 to 13, characterized in that the coil (3) is mounted on the outer front surface of the coil frame element (4). 1 5. Inertial pathogen according to any one of paragraphs. 1 -1 4, characterized in that the magnet assembly (5, 6, 7) comprises opposing generally disk-shaped pole pieces (6, 7) with a magnet (5) enclosed between them, the edge of one (7) of the pole pieces being located inside and adjacent to the node (3, 4) of the motor coil, and the edge of the other (6) of the pole pieces is made with a protruding downward flange (8) passing near the node (3, 4) of the motor coil and around it, forming a gap receiving the coil ( twenty). 1 6. Inertial vibration exciter according to claim 15, characterized in that the flange (8) is adapted to interface with the communication element (12). 1 7. The inertial vibration exciter according to claim 1 0, characterized in that it comprises a protrusion (22) on the flange (8), this protrusion having a form for interfacing with the coupling element (12), and means (13) for attaching to the coupling , and is adapted to engage the protrusion (22). 18. The inertial pathogen according to any one of paragraphs. 1 -1 7, characterized in that the suspension (24) contains spaced apart from each other in the axial direction, a pair of parts (28) of the suspension, which are made as one piece with each other. 19. The inertial vibration exciter according to claim 18, characterized in that a pair of suspension parts (28) spaced apart from each other in the axial direction are cast integrally with the carrier element (9) of the coil and with the coupling element (1 2) for engagement and maintenance magnet assembly. 20. The inertial vibration exciter according to claim 19, characterized in that the suspension parts (28) contain respective sets of elastic arms (28), each of which is associated with a corresponding coupling element (1 2). 21. A loudspeaker containing an inertial vibration exciter according to any one of claims 1 to 20.