Patent Grant
9319797
A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to any reproduction by anyone of the patent disclosure, as it appears in the United States Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever.
1. Field of Invention
The present invention relates to an electromagnetic vibration device, and more particularly to an electromagnetic vibration device, wherein a peripheral basin frame is constructed by a plurality of connection frames being connected with each other via a plurality connection members, so as to selectively adjust the diameter size of the peripheral basin frame corresponding to the size of electromagnetic vibration device. Therefore, only one single mold is required for manufacturing the connection frame to form the peripheral basin frame for the electromagnetic vibration device.
2. Description of Related Arts
Electromagnetic vibration device, such as a speaker, is a device which can transform electrical energy to sound energy. Currently, there are different speakers that incorporate with different structural configurations. Ultimately, they generate mechanical vibration to vibrate the air to generate sound waves so as to achieve an electrical-to-sound energy transformation. In particular, a manufacturing method for a conventional electromagnetic vibration device generally comprises the steps of attaching T-shaped magnetic element or U-shaped magnetic element to a lower basin frame with a magnet therein to form a magnetic loop system; coupling a terminal, a vibration layer, a voice coil, and a suspension to the lower basin frame in order to generate a reciprocatingly movement of the vibration layer in response to a magnetically induction of the voice coil the magnet; and affixing an upper basin frame to the lower basin frame to retain all the components of the speakers between the upper and lower basin frames. In other words, the diameter size of the upper basin frame must match with the diameter size of the speaker.
With the advent of high technology, living standard for people is rapidly increasing. In other words, the user looks for a speaker not only for sound generation but also generating good sound quality. It is known that a bass speaker requires a larger resonant chamber, such that a bigger size of the speaker must be manufactured to enhance the sound quality in low frequency Therefore, some large manufacturers have introduced a 14-inch speaker, 16-inch, and 18-inch large-caliber speakers to satisfy customer's needs.
Due to different sizes of the speakers, the manufacturers must make different sizes of upper basin frames to match with the size of the speakers. In particular, each size of the upper basin frame requires one particular mold. In other words, if the manufacturers need to manufacture different sizes of upper basin frames, different molds must be pre-made, which will substantially increase the manufacturing cost of the speaker. In addition, the manufacturers will use more amount of raw material to manufacture the larger size upper basin frame and the overall weight thereof will be increased. The equipment for manufacturing the larger size upper basin frame is expensive than that for manufacture the smaller size upper basin frame. Meanwhile, each mold can only make one particular size of upper basin frame.
Furthermore, when the voice coil is energized to vibrate after a predetermined time, the voice coil and magnetic loop will generate a lot amount of heat. Therefore, if the heat dissipating ability of the speaker is not good enough, it will affect the sound quality of the speaker, and even burn the speaker. Currently, the upper basin frame for the speaker is made of plastic or aluminum. The plastic made upper basin frame does not have enough heat conduction ability, such that the cooling effect thereof is not good enough. At the same time, the upper basin fame also retains the magnetic loop system in position. During the operation of the magnetic loop system, the vibration layer and the voice coil are reciprocatingly moved. In other words, the vibration force will exert to the upper basin frame. Therefore, the plastic made upper basin frame does not provide enough rigidity to retain the reciprocatingly movements of the vibration layer and the voice coil. On the other hand, even though the aluminum made upper basin frame has better heat dissipating ability, the cost of the aluminum made upper basin frame is relatively expensive.
A main object of the present invention is to provide an electromagnetic vibration device, which comprises a vibration plate device, a voice coil assembly, a magnetic loop system, and a peripheral basin frame, wherein the vibration plate device is securely coupled with the magnetic loop system via the peripheral basin frame to form the electromagnetic vibration device. The peripheral basin frame comprises a plurality of connection frames and a plurality of connection members, wherein the connection frames are coupled with each other via the connection members to form an encircling frame, such that the distance between each two connection frames can be selectively adjusted to adjust a diameter size of the encircling frame corresponding to a diameter size of the vibration plate device. Once the diameter size of the encircling frame is configured, the connection frames can be securely coupled with each other via the connection members to retain the diameter size of the encircling frame. As a result, the peripheral basin frame can be selectively configured to fit different sizes of the electromagnetic vibration device.
Another object of the present invention is to provide a manufacturing method of the electromagnetic vibration device, wherein only one single mold is required for manufacturing the connection frame, (such as manufacturing ΒΌ of the peripheral basin frame) to fit different sizes of the electromagnetic vibration device, so as to reduce the manufacturing cost and to material cost of the electromagnetic vibration device.
Another object of the present invention is to provide an electromagnetic vibration device, wherein the connection frame is made of aluminum (which also can be other metals with good heat dissipation ability), and the connection member is made of plastic by plastic injection method (other materials are available for replace the plastic), so that the heat generated from the voice coil assembly and the magnetic loop system can effectively dissipate through the connection frame to enhance the heat dissipation of the electromagnetic vibration device.
Another object of the present invention is to provide an electromagnetic vibration device, wherein in case of the malfunction of the electromagnetic vibration device, the connection frame can be re-used for a new electromagnetic vibration device, such that the peripheral basin frame is an environmental friendly product.
In order to achieve the above objects, the present invention provides an electromagnetic vibration device, which comprises a vibration plate device, a voice coil assembly, a magnetic loop system, and a peripheral basin frame.
The vibration plate device comprises a base having a ring shape, a vibration plate, an upper suspension, and a lower suspension, wherein the base has an inner peripheral surface at an inner surrounding wall of the base to define a vibration plate chamber therewithin. The vibration plate is supported within the vibration plate chamber of the base Inner edges of the upper suspension and the lower suspension are attached on a top surface and a bottom surface of the vibration plate, preferably by adhesive, respectively, wherein outer edges of the upper suspension and the lower suspension are attached on a top surface and a bottom surface of the base, preferably by adhesive, respectively.
One end of the voice coil assembly is coupled at the bottom surface of the vibration plate at the center portion thereof, wherein two cables are extended from the voice coil assembly.
The magnetic loop system comprises a pole member which is a pole piece, a magnetic member having a T-shaped cross section and made by metal, and a magnet. The magnet and the pole member are coupled on the magnetic member respectively that the pole member is on top of the magnetic member.
Two ends of the peripheral basin frame are coupled to the vibration plate device and the magnetic loop system respectively, wherein the vibration plate device is coupled at the upper end of the peripheral basin frame while the magnetic loop system is coupled at the lower end of the peripheral basin frame to form the electromagnetic vibration device. The peripheral basin frame comprises a plurality of connection frames, a plurality of connection members, and a connection base. Accordingly, one end of each of the connection frames is coupled to the vibration plate device, and the other end of each of the connection frames is coupled to the connection base. In addition, the connection frames are coupled with each other via the connection members. In other words, each connection member couples with two ends of two adjacent connection frames in order to connect the connection frames with each other end-to-end to form an encircling frame. Therefore, the encircling frame configured by the connection frames is coupled on the connection base, so as to form the integrated structure of the peripheral basin frame. Moreover, the connection base has a center through slot, a connection hole, and an outwardly extended retention wing, wherein when the magnetic loop system is coupled to the connection base, the connection hole is aligned with the first positioning hole of the pole member, such that the magnetic loop system can be secured to the connection base of the peripheral basin frame by affixing at least a screw through the connection hole and the first positioning hole.
Accordingly, the connection frame further has a first connection portion and a second connection portion. The first connection portion is downwardly extended from the bottom surface of the connection frame to couple at the retention wing of the connection base. The second connection portion is upwardly extended from the upper surface of the connection frame to retain the electromagnetic vibration device in position.
Moreover, the connection frame further has at least one through hole formed at the first connection portion to couple at the retention wing of the connection base via a screw.
In particular, the connection frame further comprises a supporting rim integrally and outwardly projected from an inner surface of the connection frame at the upper portion thereof, wherein the supporting rim has an arc configuration matching with a curvature of the outer peripheral edge of the base of the vibration plate device. Therefore, when the connection frames are coupled with each other, the supporting rims are radially and spacedly aligned to form a plurality of rim support segments secured at the outer peripheral edge of the base of the vibration plate device.
Furthermore, the connection frame further has at least a second positioning hole formed at the supporting rim, wherein the vibration plate device is secured at the supporting rim by affixing a screw through the second positioning hole.
In particular, the inner surface of the connection frame is engaged with the outer peripheral edge of the base of the vibration plate device, preferably by adhesive, while the upper surface of the supporting rim is engaged with the bottom surface of the base of the vibration plate device, preferably by adhesive, so as to securely couple and seal the base of the vibration plate device at the connection frame.
Alternatively, the base of the vibration plate device can be engaged with the supporting part of the connection frame via any fastening structure such as clip-on engagement.
Furthermore, the connection frame further has at least two connection holes formed at two ends of the second connection portion respectively, wherein the connection member is securely coupled at two second connection portions of two connection frames by the screws through the connection holes, so as to connect the two connection frames with each other.
Moreover, the connection frame is made of a metal material with good thermal conductivity.
Preferably, the connection frame is made of aluminum.
Accordingly, the connection frame has at least one metal terminal to electrically connect to the cables of the voice coil assembly.
Moreover, the outer surface of the connection frame has a plurality of spaced apart projected ribs to enhance the rigidity of the connection frame, wherein a heat dissipating slot is formed within each two adjacent projected ribs so as to enhance heat dissipating surface of the connection frame.
It is worth mentioning that during the operation of the electromagnetic vibration device, the voice coil assembly and the magnetic loop system are magnetically inducted to generate a huge amount of the heat, so that the heat can be dissipated from the connection frame to the surroundings.
It is worth mentioning that for a large-sized electromagnetic vibration device having a larger diameter, a larger diameter size of the peripheral basin frame must be used. The diameter size of the peripheral basin frame can be selectively adjusted via the connection frames and the connection members. In other words, a distance between two adjacent connection frames can be selectively adjusted via the connection member, wherein the connection member is coupled between the two adjacent connection frames to retain the predetermined distance therebetween. When the distance between two adjacent connection frames is increased, the diameter size of the peripheral basin frame will be increased. Likewise, by increasing the numbers of the connection frames, the diameter size of the peripheral basin frame will also be increased. Therefore, the diameter size of the peripheral basin frame can be selectively adjusted to match with the diameter size of the vibration plate device. Once the connection frames are configured to form the encircling frame that matches with the vibration plate device, the connection members are coupled to the connection frames to retain the diameter size of the encircling frame so as to form the peripheral basin frame around the vibration plate device.
A manufacturing method of the electromagnetic vibration device comprises the following steps.
(a) Provide a first mold for the connection frame, wherein the connection frame is formed by die casting or stamping process.
(b) Provide a second mold for the connection member, wherein the connection member is made by plastic mold injection.
(c) Connect the connection frames, for example four connecting frames, via the connection members to form the encircling frame as an upper peripheral basin frame (which can also form an integral peripheral basin frame).
(d) Connect the encircling frame with the connection base via the screw fastening at the through hole to form the peripheral basin frame.
(e) Dispose the upper suspension and the vibration plate in a base mold, wherein the base is formed by plastic mold injection to integrally connect with the upper suspension between the vibration plate and the base so as to form a vibration unit.
(f) Couple an inner edge of the lower suspension at the bottom surface of the vibration plate of the vibration unit, preferably by adhesive, and couple an outer edge of the lower suspension at the bottom surface of the base to couple the lower suspension between the vibration plate and the base so as to form the vibration plate device.
It is worth mentioning that two vibration units can be coupled with each other to form the vibration plate device, wherein one of the vibration units is flipped 180 degrees, i.e. up-side-down, to couple with another vibration unit. In other words, two vibration plates are overlapped with each other while one of the upper suspensions is flipped to serve as the lower suspension. Accordingly, the two vibration units can be fastened by adhesive or any fastening structure.
(g) Dispose the magnetic member, the magnet, and the pole member in a third mold, wherein a lower basin frame is formed by plastic mold injection to connect the magnetic member, the magnet, and the pole member with each other. In other words, the magnetic loop system is built-in with the lower basin frame.
(h) Couple the voice coil assembly at the vibration plate via a supportive plate.
(i) Couple the vibration plate device at the lower basin frame to operatively couple the voice coil assembly with the magnetic loop system through the peripheral basin frame via screws, heat-welding, and fastener, such that the integrated electromagnetic vibration device, such as a speaker or a bass speaker with larger diameter, is formed.
The advantage of the present invention is that the vibration plate device is securely coupled with the magnetic loop system via the peripheral basin frame to form the electromagnetic vibration device. The peripheral basin frame comprises a plurality of connection frames and a plurality of connection members, wherein the connection frames are coupled with each other via the connection members to form an encircling frame, such that the distance between each two connection frames can be selectively adjusted to adjust a diameter size of the encircling frame corresponding to a diameter size of the vibration plate device. Once the diameter size of the encircling frame is configured, the connection frames can be securely coupled with each other via the connection members to retain the diameter size of the encircling frame. As a result, the peripheral basin frame can be selectively configured to fit different sizes of the electromagnetic vibration device. In addition, only one single mold is required for manufacturing the connection frame to fit different sizes of the electromagnetic vibration device, so as to reduce the manufacturing cost and to material cost of the electromagnetic vibration device. Furthermore, the connection frame is made of high heat dissipation material, so that the heat generated from the voice coil assembly and the magnetic loop system can effectively dissipate through the connection frame to enhance the heat dissipation of the electromagnetic vibration device.
Referring to
The vibration plate device 10 comprises a base 11 having a ring shape, a vibration plate 12, an upper suspension 13, and a lower suspension 14, wherein the base 11 has an inner peripheral surface at an inner surrounding wall of the base 11 to define a vibration plate chamber 111 therewithin. The vibration plate 12 is supported within the vibration plate chamber 111 of the base 11. Timer edges of the upper suspension 13 and the lower suspension 14 are attached on a top surface and a bottom surface of the vibration plate 12, preferably by adhesive, respectively, wherein outer edges of the upper suspension 13 and the lower suspension 14 are attached on a top surface and a bottom surface of the base 11, preferably by adhesive, respectively.
One end of the voice coil assembly 20 is coupled at the bottom surface of the vibration plate 12 at the center portion thereof, wherein two cables 21 are extended from the voice coil assembly 20.
The magnetic loop system 30 comprises a pole member 31 which is a pole piece, a magnetic member 32 having a T-shaped cross section and made by metal, and a magnet 33, wherein at least one first positioning hole 311 is formed at the pole member 31. When two or more of first positioning holes 311 are configured, the first positioning holes 311 are radially positioned on the pole member 31. The magnet 33 and the pole member 31 are coupled on the magnetic member 32 respectively that the pole member 31 is on top of the magnetic member 32.
As shown in
Accordingly, the connection frame 41 further has a first connection portion 411 and a second connection portion 412. The first connection portion 411 is downwardly extended from the bottom surface of the connection frame 41 to couple at the retention wing 432 of the connection base 43. The second connection portion 412 is upwardly extended from the upper surface of the connection frame 41 to retain the electromagnetic vibration device in position.
Moreover, the connection frame 41 further has at least one through hole 413 formed at the first connection portion 411 to couple at the retention wing 432 of the connection base 43 via a screw.
In particular, the connection frame 41 further comprises a supporting rim 414 integrally and outwardly projected from an inner surface of the connection frame 41 at the upper portion thereof, wherein the supporting rim 414 has an arc configuration matching with a curvature of the outer peripheral edge of the base 11 of the vibration plate device 10. Therefore, when the connection frames 41 are coupled with each other, the supporting rims 414 are radially and spacedly aligned to form a plurality of rim support segments secured at the outer peripheral edge of the base 11 of the vibration plate device 10.
Furthermore, the connection frame 41 further has at least a second positioning hole 415 formed at the supporting rim 414, wherein the vibration plate device 10 is secured at the supporting rim 414 by affixing a screw through the second positioning hole 415.
In particular, the inner surface of the connection frame 41 is engaged with the outer peripheral edge of the base 11 of the vibration plate device 10, preferably by adhesive, while the upper surface of the supporting rim 414 is engaged with the bottom surface of the base 11 of the vibration plate device 10, preferably by adhesive, so as to securely couple and seal the base 11 of the vibration plate device 10 at the connection frame 41.
Alternatively, the base 11 of the vibration plate device 10 can be engaged with the supporting part 414 of the connection frame 41 via any fastening structure such as clip-on engagement.
Furthermore, the connection frame 41 further has at least two connection holes 415 formed at two ends of the second connection portion 412 respectively, wherein the connection member 42 is securely coupled at two second connection portions 412 of two connection frames 41 by the screws through the connection holes 415, so as to connect the two connection frames 41 with each other.
Moreover, the connection frame 41 is made of a metal material with good thermal conductivity.
Preferably, the connection frame 41 is made of aluminum.
Accordingly, the connection frame 41 has at least one metal terminal 416 to electrically connect to the cables 21 of the voice coil assembly 20.
Moreover, the outer surface of the connection frame 41 has a plurality of spaced apart projected ribs 417 to enhance the rigidity of the connection frame 41, wherein a heat dissipating slot 418 is formed within each two adjacent projected ribs 417 so as to enhance heat dissipating surface of the connection frame 41.
It is worth mentioning that during the operation of the electromagnetic vibration device, the voice coil assembly 20 and the magnetic loop system 30 are magnetically inducted to generate a huge amount of the heat, so that the heat can be dissipated from the connection frame 41 to the surroundings.
It is worth mentioning that for a large-sized electromagnetic vibration device having a larger diameter, a larger diameter size of the peripheral basin frame 40 must be used. The diameter size of the peripheral basin frame 40 can be selectively adjusted via the connection frames 41 and the connection members 42. In other words, a distance between two adjacent connection frames 41 can be selectively adjusted via the connection member 42, wherein the connection member 42 is coupled between the two adjacent connection frames 41 to retain the predetermined distance therebetween. When the distance between two adjacent connection frames 41 is increased, the diameter size of the peripheral basin frame 40 will be increased. Likewise, by increasing the numbers of the connection frames 41, the diameter size of the peripheral basin frame 40 will also be increased. Therefore, the diameter size of the peripheral basin frame 40 can be selectively adjusted to match with the diameter size of the vibration plate device 10. Once the connection frames 41 are configured to form the encircling frame that matches with the vibration plate device 10, the connection members 42 are coupled to the connection frames 41 to retain the diameter size of the encircling frame so as to form the peripheral basin frame 40 around the vibration plate device 10.
A manufacturing method of the electromagnetic vibration device comprises the following steps.
(a) Provide a first mold for the connection frame 41, wherein the connection frame 41 is formed by die casting or stamping process.
(b) Provide a second mold for the connection member 42, wherein the connection member 42 is made by plastic mold injection.
(c) Connect the connection frames 41, for example four connecting frames, via the connection members 42 to form the encircling frame as an upper peripheral basin frame (which can also form an integral peripheral basin frame).
(d) Connect the encircling frame with the connection base 43 via the screw fastening at the through hole 413 to form the peripheral basin frame 40.
(e) Dispose the upper suspension 13 and the vibration plate 12 in a base mold, wherein the base 11 is formed by plastic mold injection to integrally connect with the upper suspension 13 between the vibration plate 12 and the base 11 to form a vibration unit.
(f) Couple the inner edge of the lower suspension 14 at the bottom surface of the vibration plate of the vibration unit, preferably by adhesive, and couple the outer edge of the lower suspension 14 at the bottom surface of the base 11 to connect the lower suspension 14 between the vibration plate 12 and the base 11 so as to form the vibration plate device 10.
It is worth mentioning that two vibration units can be coupled with each other to form the vibration plate device 10, wherein one of the vibration units is flipped 180 degrees, i.e. up-side-down, to couple with another vibration unit. In other words, two vibration plates 12 are overlapped with each other while one of the upper suspensions 13 is flipped to serve as the lower suspension 14. Accordingly, the two vibration units can be fastened by adhesive or any fastening structure.
(g) Dispose the magnetic member 32, the magnet 33, and the pole member 31 in a third mold, wherein a lower basin frame is formed by plastic mold injection to connect the magnetic member 32, the magnet 33, and the pole member 31 with each other. In other words, the magnetic loop system 30 is built-in with the lower basin frame.
(h) Couple the voice coil assembly 20 at the vibration plate 12 via a supportive plate.
(i) Couple the vibration plate device 10 at the lower basin frame to operatively couple the voice coil assembly 20 with the magnetic loop system 30 through the peripheral basin frame 40 via one of screws, heat-welding, and fastener, such that the integrated electromagnetic vibration device, such as a speaker or a bass speaker with larger diameter, is formed.
One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.
It will thus be seen that the objects of the present invention have been fully and effectively accomplished. The embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2012 1 0091531 | Mar 2012 | CN | national |
| 2012 2 0129454 U | Mar 2012 | CN | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/CN2012/073870 | 4/12/2012 | WO | 00 | 9/30/2014 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2013/143173 | 10/3/2013 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 8175319 | Sumitani | May 2012 | B2 |
| Number | Date | Country |
|---|---|---|
| 2355616 | Apr 2001 | GB |
| Number | Date | Country | |
|---|---|---|---|
| 20150063609 A1 | Mar 2015 | US |
