CA2177400A1 - Thin full range speaker system - Google Patents
Thin full range speaker systemInfo
- Publication number
- CA2177400A1 CA2177400A1 CA002177400A CA2177400A CA2177400A1 CA 2177400 A1 CA2177400 A1 CA 2177400A1 CA 002177400 A CA002177400 A CA 002177400A CA 2177400 A CA2177400 A CA 2177400A CA 2177400 A1 CA2177400 A1 CA 2177400A1
- Authority
- CA
- Canada
- Prior art keywords
- planar diaphragm
- voice coil
- coil bobbin
- front planar
- system enclosure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000002184 metal Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 2
- 241000239290 Araneae Species 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000003584 silencer Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/127—Non-planar diaphragms or cones dome-shaped
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
- H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
A thin full range speaker system has a planar diaphragm and a coaxial electromagnetic driver. Its light weight and compact size make it suitable to be used as a wall-mounted or a ceiling-mounted speaker system.
Description
- 217740~
This invention relates to a full range thin speaker system which is compact, light and suitable for wall or ceiling mounting providing high-fidelity sound reproduction.
Generally, conventional full range speaker systems consisting of at least a tweeter and a woofer enclosed in a box are bulky and heavy. When a speaker system is to be mounted against a wall, a bulky conventional cone speaker system is impractical. Comparatively, it is easier to make a flat type speaker system thin and is suitable for wall mounting applications.
A flat speaker typically includes a planar diaphragm instead of the cone-shaped diaphragm of a cone speaker. The planar diaphragm is constructed from light, rigid material, such as foam polystyrene. Behind the planar diaphragm, there is at least one electromagnetic driver. In accordance with acoustic principle, the frequency range of a foam-plastic planar diaphragm is a function of its density, thickness and diameter. In order to reproduce a full range sound spectrum, a planar diaphragm has to be divided into a low frequency region and a high frequency region. The low frequency region has a larger diameter and is thinner than the high frequency region, and each region has its own driver. This complicates the system construction and increases manufacturing costs.
As is well known, a coaxial cone-speaker transducer is popular as a compact, full range speaker transducer. In addition, the manufacturing process of a conventional cone speaker is mature.
The first objective of this invention is to provide a speaker system which is as thin as a flat speaker system with the advantages of a conventional coaxial speaker system. Another objective of this invention is to provide a speaker system structure which is easy to build. This invention integrates the advantages of a planar speaker and a coaxial conical speaker.
The preferred embodiments of the present invention will be described in greater detail with reference to the accompanying drawings.
A brief description of the drawings.
Fig.l is a sectional view of an embodiment of the present invention;
Fig.2 is a sectional view of the embodiment of Fig.l, showing the beam structure;
Fig.3 is another sectional view of Fig.l, showing the air pathway of a silencer apparatus;
Fig.4 depicts the sub-assembly modules of the embodiment shown in Fig.l;
- 2177~00 Fig.5 is a sectional view of the fixing structure joining the voice bobbin and the front planar diaphragm;
Fig.6 is a sectional view of an one-piece embodiment of the system enclosure of the invention;
Fig.7 is a sectional view of another embodiment of the system enclosure.
Referring now to Fig.l, a coaxial electromagnetic driver having a magnet 2, a voice coil(not shown), and a voice coil bobbin 3, a tweeter 10 and a frame 1 supporting two dampers 12, 13; the damper 12 is a normal damper;
the damper 13 is an auxiliary centering means to keep the voice bobbin in position; the frame and thus the whole electromagnetic driver is fastened to beams 26, 27; beams 26, 27 are sited on an internal shoulder structure 6 of the system enclosure 4; the shoulder structure 6 is also supporting a silencer apparatus 50 at rear side and a planar diaphrag~ 7 at the front side; the rear side cover 25 having an extrusion means 25a to protect air outlet 24 from being blocked when mounted flat against a wall;
the silencer apparatus has been explained in an application for another invention~serial number 2,174,455) of the inventor, and will not be repeated here.
In Fig.2 and Fig.4, beam structure 26, 27 is shown. The frame 1 of an electromagnetic driver assembly 40 is fastened to said beam structure 26, 27. The front planar diaphragm 7 and the suspension 8 are locked into its position by a frame 9. The suspension 8 is made of foam rubber or similar material. ~hen the frame 1 of the electromagnetic driver 40 is fastened to beams 26, 27, the front edge of the voice coil bobbin 3 will fit into the opening of the front planar diaphragm 7. Snap-in disc ring lla snaps into the clamping means 11, thus completing the assembly of the electromagnetic driver 40 and the system enclosure assembly 30.
Fig.5 is an enlarged sectional view of a snap-in clamping means. In Fig.3 an air pathway, 15-22, of a silencer apparatus is shown. The rearward sound waves will be absorbed and decreased by the silencer apparatus when passing through 15-22.
In Fig.6, a sectional view of an one piece system enclosure is shown.
Compared with the system enclosure shown in Fig.l, the manufacturing and assembly costs can be lower. In Fig.7, another embodiment of a system enclosure having a metal skeleton 4a and heat dissipation surface 4b is shown. The metal skeleton can be made of a punched metal sheet or woven - - 217740~
metal to take advantage of its lighter weight. A foam plastic covering 4c is used for protection and vibration absorbing purposes. Since the present invention has an intrinsic system enclosure, no front baffle board is needed for speaker transducer mounting, usually necessary for a conventional cone-speaker system. On the contrary, the front planar diaphragm of the present invention is made of foam-polystyrene or similar material, which is very light compared to the front baffle board of a conventional speaker box. Thus the weight of the present invention speaker system is much less than a conventional cone-speaker system.
Full-range sound response is easier to design and more economical to manufacture than a simple flat speaker system. The compact size, light weight, full-range acoustic response and easy of assembly are the features of the present invention.
This invention relates to a full range thin speaker system which is compact, light and suitable for wall or ceiling mounting providing high-fidelity sound reproduction.
Generally, conventional full range speaker systems consisting of at least a tweeter and a woofer enclosed in a box are bulky and heavy. When a speaker system is to be mounted against a wall, a bulky conventional cone speaker system is impractical. Comparatively, it is easier to make a flat type speaker system thin and is suitable for wall mounting applications.
A flat speaker typically includes a planar diaphragm instead of the cone-shaped diaphragm of a cone speaker. The planar diaphragm is constructed from light, rigid material, such as foam polystyrene. Behind the planar diaphragm, there is at least one electromagnetic driver. In accordance with acoustic principle, the frequency range of a foam-plastic planar diaphragm is a function of its density, thickness and diameter. In order to reproduce a full range sound spectrum, a planar diaphragm has to be divided into a low frequency region and a high frequency region. The low frequency region has a larger diameter and is thinner than the high frequency region, and each region has its own driver. This complicates the system construction and increases manufacturing costs.
As is well known, a coaxial cone-speaker transducer is popular as a compact, full range speaker transducer. In addition, the manufacturing process of a conventional cone speaker is mature.
The first objective of this invention is to provide a speaker system which is as thin as a flat speaker system with the advantages of a conventional coaxial speaker system. Another objective of this invention is to provide a speaker system structure which is easy to build. This invention integrates the advantages of a planar speaker and a coaxial conical speaker.
The preferred embodiments of the present invention will be described in greater detail with reference to the accompanying drawings.
A brief description of the drawings.
Fig.l is a sectional view of an embodiment of the present invention;
Fig.2 is a sectional view of the embodiment of Fig.l, showing the beam structure;
Fig.3 is another sectional view of Fig.l, showing the air pathway of a silencer apparatus;
Fig.4 depicts the sub-assembly modules of the embodiment shown in Fig.l;
- 2177~00 Fig.5 is a sectional view of the fixing structure joining the voice bobbin and the front planar diaphragm;
Fig.6 is a sectional view of an one-piece embodiment of the system enclosure of the invention;
Fig.7 is a sectional view of another embodiment of the system enclosure.
Referring now to Fig.l, a coaxial electromagnetic driver having a magnet 2, a voice coil(not shown), and a voice coil bobbin 3, a tweeter 10 and a frame 1 supporting two dampers 12, 13; the damper 12 is a normal damper;
the damper 13 is an auxiliary centering means to keep the voice bobbin in position; the frame and thus the whole electromagnetic driver is fastened to beams 26, 27; beams 26, 27 are sited on an internal shoulder structure 6 of the system enclosure 4; the shoulder structure 6 is also supporting a silencer apparatus 50 at rear side and a planar diaphrag~ 7 at the front side; the rear side cover 25 having an extrusion means 25a to protect air outlet 24 from being blocked when mounted flat against a wall;
the silencer apparatus has been explained in an application for another invention~serial number 2,174,455) of the inventor, and will not be repeated here.
In Fig.2 and Fig.4, beam structure 26, 27 is shown. The frame 1 of an electromagnetic driver assembly 40 is fastened to said beam structure 26, 27. The front planar diaphragm 7 and the suspension 8 are locked into its position by a frame 9. The suspension 8 is made of foam rubber or similar material. ~hen the frame 1 of the electromagnetic driver 40 is fastened to beams 26, 27, the front edge of the voice coil bobbin 3 will fit into the opening of the front planar diaphragm 7. Snap-in disc ring lla snaps into the clamping means 11, thus completing the assembly of the electromagnetic driver 40 and the system enclosure assembly 30.
Fig.5 is an enlarged sectional view of a snap-in clamping means. In Fig.3 an air pathway, 15-22, of a silencer apparatus is shown. The rearward sound waves will be absorbed and decreased by the silencer apparatus when passing through 15-22.
In Fig.6, a sectional view of an one piece system enclosure is shown.
Compared with the system enclosure shown in Fig.l, the manufacturing and assembly costs can be lower. In Fig.7, another embodiment of a system enclosure having a metal skeleton 4a and heat dissipation surface 4b is shown. The metal skeleton can be made of a punched metal sheet or woven - - 217740~
metal to take advantage of its lighter weight. A foam plastic covering 4c is used for protection and vibration absorbing purposes. Since the present invention has an intrinsic system enclosure, no front baffle board is needed for speaker transducer mounting, usually necessary for a conventional cone-speaker system. On the contrary, the front planar diaphragm of the present invention is made of foam-polystyrene or similar material, which is very light compared to the front baffle board of a conventional speaker box. Thus the weight of the present invention speaker system is much less than a conventional cone-speaker system.
Full-range sound response is easier to design and more economical to manufacture than a simple flat speaker system. The compact size, light weight, full-range acoustic response and easy of assembly are the features of the present invention.
Claims (5)
1. A thin full range speaker system comprising:
an electromagnetic driver means; said driver means having a voice coil bobbin affixed to a front planar diaphragm; said planar diaphragm is suspended from an encircled frame of a system enclosure by a layer of foam plastic rubber or similar material; said voice coil bobbin having a large enough diameter or a bell-shaped mouth to accept a coaxial high frequency tweeter; said electromagnetic driver having a small frame to support two dampers, one normal damper and an auxiliary centering spider;
said electromagnetic driver is fixed to a system enclosure by fastening the said frame to a mechanical structure inside the system enclosure;
said front planar diaphragm having an opening into which the voice coil bobbin is fixed; and said coaxial tweeter radiates high frequency sound waves through this front planar diaphragm opening.
an electromagnetic driver means; said driver means having a voice coil bobbin affixed to a front planar diaphragm; said planar diaphragm is suspended from an encircled frame of a system enclosure by a layer of foam plastic rubber or similar material; said voice coil bobbin having a large enough diameter or a bell-shaped mouth to accept a coaxial high frequency tweeter; said electromagnetic driver having a small frame to support two dampers, one normal damper and an auxiliary centering spider;
said electromagnetic driver is fixed to a system enclosure by fastening the said frame to a mechanical structure inside the system enclosure;
said front planar diaphragm having an opening into which the voice coil bobbin is fixed; and said coaxial tweeter radiates high frequency sound waves through this front planar diaphragm opening.
2. As defined in claim 1, said voice coil bobbin means having a cylindrical ring device at the front end of the voice coil bobbin, as part of a snap-in assembly; there is a flange at the inner end of the cylindrical ring device in contact with and supporting the inner surface of the front planar diaphragm; at the outer end of the said cylindrical ring device, there is a clamping means, a snap-in ring disc pressing the outer surface of the front planar diaphragm firmly; said cylindrical ring device and ring disc together form a snap-in structure.
3. As defined in claim 1, said system enclosure is a one piece, hollow cylinder-shaped structure having a protruding circular shoulder for the said front planar diaphragm to fit into and to support the said coaxial electromagnetic driver.
4. As defined in claim 3, said system enclosure having metal sheet interior wall as a skeleton; the exterior wall of the said metal skeleton is covered with foam-plastic or similar material; at least the recessed region of the metal skeleton is solid and bare to allow direct contact with the surrounding air to facilitate heat dissipation.
5. As defined in claim 1, said coaxial transducer comprising a midrange cone speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002177400A CA2177400A1 (en) | 1996-05-27 | 1996-05-27 | Thin full range speaker system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002177400A CA2177400A1 (en) | 1996-05-27 | 1996-05-27 | Thin full range speaker system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2177400A1 true CA2177400A1 (en) | 1997-11-28 |
Family
ID=4158277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002177400A Abandoned CA2177400A1 (en) | 1996-05-27 | 1996-05-27 | Thin full range speaker system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2177400A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008043260A1 (en) * | 2006-09-27 | 2008-04-17 | Bailiang Zhang | Vibrating system of panel form electrodynamic loudspeaker |
-
1996
- 1996-05-27 CA CA002177400A patent/CA2177400A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008043260A1 (en) * | 2006-09-27 | 2008-04-17 | Bailiang Zhang | Vibrating system of panel form electrodynamic loudspeaker |
| US8144916B2 (en) | 2006-09-27 | 2012-03-27 | Bailiang Zhang | Vibrating system of panel form electrodynamic loudspeaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |