GB2230677A - Loudspeaker diaphragm balancing - Google Patents

Loudspeaker diaphragm balancing Download PDF

Info

Publication number
GB2230677A
GB2230677A GB9003320A GB9003320A GB2230677A GB 2230677 A GB2230677 A GB 2230677A GB 9003320 A GB9003320 A GB 9003320A GB 9003320 A GB9003320 A GB 9003320A GB 2230677 A GB2230677 A GB 2230677A
Authority
GB
United Kingdom
Prior art keywords
edge
cone
type speaker
balance
vibration system
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.)
Granted
Application number
GB9003320A
Other versions
GB2230677B (en
GB9003320D0 (en
Inventor
Kunio Mitobe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Publication of GB9003320D0 publication Critical patent/GB9003320D0/en
Publication of GB2230677A publication Critical patent/GB2230677A/en
Application granted granted Critical
Publication of GB2230677B publication Critical patent/GB2230677B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • 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
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/201—Damping aspects of the outer suspension of loudspeaker diaphragms by addition of additional damping means

Description

1 CONE-TYPE SPEAKER The present invention relates to a cone-type speakers,
and more particularly, relates to a cone-type speaker which prevents rolling vibrations caused by an imbalance of the speaker's vibration system.
With the recent trend towards miniaturization of speaker systems, highcompliance vibration systems, especially diaphragms, have been required in order to improve low-band reproducing characteristics. In such a highcompliance diaphragm, the weight balance sometimes becomes unbalanced by the presence of, for example, solder and tinsel wire connected to a conical diaphragm. As a result, rolling is generated during piston movement, thereby causing abnormal vibrations which results in abnormal sound from the rubbing of a voice coil, flapping by the diaphragm, etc.
As a representative prior art system, reference can be made to Japanese Utility Model Post-Exami nation Publication No. 57-10155.
In such a prior art system, althou gh weight balance can be performed, a bonding step or the like is required, thereby making the production of the system difficult and expensive. Accordingly, it cannot be said that this prior art is a perfect countermeasure.
It is therefore an object of the present invention to provide weight balance during the formation of a vibration system, thereby solving the production problems associated with the prior art systems.
In order to obviate the problems as described above, a cone-type speaker according to the present invention is configured so that an electric sound signal is fed to a voice coil through a tinsel wire, and a balance portion, which serves as a counter balance, is formed on an edge of a vibration system of the cone-type speaker when the edge is formed.
2 The balance portion may be formed on the rear side of the edge, or it may be formed on the front side of the edge. The balance portion may also be formed on the edge at its outer periphery or at its portion integrated with a diaphragm.
Referring to the accompanying drawings, embodiments of the cone-type speaker according to the present invention will now be described.
Figure 1 is a plan view of a vibration system of a first speaker; Figures. 2 through 6 are partially enlarged sectional views showing embodiments taken on a line XX in Figure 1; and Figure 7 is a plan view showing another embodiment of the invention.
As shown in Figure 1, reference numeral 10 designates a cone-type diaphragm. An edge 11 is formed on the diaphragm 10 at its circumference through insertionmoulding, or the like. A counterbalance weight W in the form of a balance portion is integrally formed on the rear side of the edge 11 when it is formed through injection moulding so that the balance weight W is positioned on a diametric line extending through a tinsel wire K. The weight, size and position of the balance weight W are determined so that the balance weight W serves to balance the tinsel wire K attached to the diaphragm 10. Specifically, as shown in Figure 2, the balance weight W is provided in the vicinity of a connection portion between the edge 11 and the diaphragm 10 or, as shown in Figure 3, the balance weight W is provided adjacent to the radially outer periphery of its rear side.
As shown in Figure 4, the balance weight W may be formed on the back surface of the connection portion between the edge 11 and the diaphragm 10. As shown in Figure 5, the balance weight W may be formed on the edge 11 at its radially inner periphery, or, as shown in Figure 6, 1 3 the weight W may be formed on the edge 11 at its front, adjacent to the radially outer periphery.
It is convenient when attaching the tinsel wire K, to stamp a symbol on the edge or the like so that the position of the balance weight W can be recognized from the front side.
Although the embodiments shown in Figs. 1-6 each show a balance weight W provided on the same diametric line as the tinsel wire K, the balance weight W may be divided into 10 two equal weights W and W as shown in Figure 7.
Thus, a balance portion is simultaneously formed during the formation of the edge 11 (i.e., the balance portion and the edge 11 are simultaneously formed by insertion moulding), so that unbalance caused in the diaphragm 10 is eliminated, rolling never occurs when driving the diaphragm, and the diaphragm does not abnormally vibrate. Further, the resonance of the edge 11 can be varied to make the characteristics smooth.
1 4

Claims (11)

1. A cone-type speaker comprising a vibration system having an edge portion, and a voice coil for receiving an electric sound signal through tinsel wire attached to the vibration system, and a balance portion formed on an edge of the vibration system when the edge is formed, the balance portion being formed at a position of the edge to counter-balance the weight of the tinsel wire.
2. A cone-type speaker according to claim 1, wherein the balance portion is formed on the rear of the edge.
3. A cone-type speaker according to claim 1, wherein the 15 balance portion is formed on the front of the edge.
4. A cone-type speaker according to any of claims 1 to 3, wherein the balance portion is formed on the edge at its inner periphery, at that portion of the edge which is integrated with a vibration system diaphragm.
5. A cone-type speaker according to any of claims 1 to 3, wherein the balance portion is formed at or adjacent a connection portion connecting the edge and the vibration system.
6. A cone-type speaker according to claim 5, wherein the balance portion is formed on the back surface of the connection portion.
7. A cone-type speaker according to any of claims 1 to 3, wherein the balance portion is formed at the edge portionl's outer periphery.
8. A cone-type speaker according to any of claims 1 to 7, wherein the balance portion is formed on the edge at a position through which passes a diametral line through the tinsel wire.
9. A cone-type speaker according to any of claims 1 to 7, wherein the balance portion comprises f irst and second portions.
10. A cone-type speaker according to claim 1, substantially as described with reference to any of the examples shown in the accompanying drawings.
11. A method of making a cone-type speaker comprising a vibration system having an edge portion and a voice coil for receiving an electric sound signal through tinsel wire attached to the vibration system, and a balance portion formed on an edge of the vibration system, wherein the balance portion is formed simultaneously with the formation of the edge portion.
Publithed 1990at7he Patent 0Mce. 5t4teRmac.6871 H4hHolborn.LondonWC1R4TP. PurtheroopieabeobuLinedtrom ThePatentotrice. awas]Branch, St MU7 Cray. Orpington, Kent BM 3RD. Printed by Multiplex twhwques JuL St Mary Cray. Kent, Con. 1187
GB9003320A 1989-04-22 1990-02-14 Cone-type speaker Expired - Fee Related GB2230677B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10373989A JPH02281899A (en) 1989-04-22 1989-04-22 Cone type loudspeaker

Publications (3)

Publication Number Publication Date
GB9003320D0 GB9003320D0 (en) 1990-04-11
GB2230677A true GB2230677A (en) 1990-10-24
GB2230677B GB2230677B (en) 1993-07-21

Family

ID=14361989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9003320A Expired - Fee Related GB2230677B (en) 1989-04-22 1990-02-14 Cone-type speaker

Country Status (3)

Country Link
JP (1) JPH02281899A (en)
DE (1) DE4005849A1 (en)
GB (1) GB2230677B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1381251A2 (en) * 2002-07-12 2004-01-14 Pioneer Corporation Speaker and speaker diaphragm

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1478169A (en) * 1974-12-23 1977-06-29 Foster Electric Co Ltd Diaphragm for electroacoustic transducer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51142128A (en) * 1974-10-29 1976-12-07 Aisin Seiki Temperature changeeover valve
JPS5710155U (en) * 1980-06-17 1982-01-19
NL8204839A (en) * 1982-01-04 1983-08-01 Jensen Int Inc ELECTRO-DYNAMIC ACTUATOR FOR A SPEAKER AND ACCOMPANYING MEMBRANE.
GB2160741B (en) * 1984-04-24 1988-04-27 Wharfedale Loudspeaker Moving-coil loudspeaker drive unit
DE3603537A1 (en) * 1986-02-05 1987-08-06 Pfleid Wohnraumakustik Gmbh BROADBAND SPEAKER

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1478169A (en) * 1974-12-23 1977-06-29 Foster Electric Co Ltd Diaphragm for electroacoustic transducer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1381251A2 (en) * 2002-07-12 2004-01-14 Pioneer Corporation Speaker and speaker diaphragm
EP1381251A3 (en) * 2002-07-12 2005-07-13 Pioneer Corporation Speaker and speaker diaphragm
US6957714B2 (en) 2002-07-12 2005-10-25 Pioneer Corporation Speaker and speaker diaphragm

Also Published As

Publication number Publication date
GB2230677B (en) 1993-07-21
GB9003320D0 (en) 1990-04-11
DE4005849A1 (en) 1990-10-25
JPH02281899A (en) 1990-11-19
DE4005849C2 (en) 1992-01-23

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 19940322

PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970214