CN106559727B

CN106559727B - Speaker, drum paper thereof, manufacturing method thereof, sounding method thereof and sound effect device

Info

Publication number: CN106559727B
Application number: CN201610858649.6A
Authority: CN
Inventors: 黄新民
Original assignee: Tang Band Industries Co Ltd
Current assignee: Tang Band Industries Co Ltd
Priority date: 2015-09-29
Filing date: 2016-09-28
Publication date: 2024-04-02
Anticipated expiration: 2036-09-28
Also published as: CN106559727A; CN117915239A; WO2017054729A1; CN206389545U

Abstract

A speaker and a paper drum, a manufacturing method and a sound producing method thereof, and a sound effect device are disclosed, wherein the paper drum is provided between a supporting unit and a voice coil to be driven by the voice coil to drum air, the paper drum includes a pair of first portions and a pair of second portions connected to each other and having a first axial direction and a second axial direction which extend in directions perpendicular to each other, each of the first portions is symmetrically provided in the first axial direction, each of the second portions is symmetrically provided in the second axial direction, and a length dimension of the first portions is larger than a length dimension of the second portions, by which means the speaker composed of the paper drum can increase a sound volume of the speaker by increasing an air amount of the paper drum.

Description

Speaker, drum paper thereof, manufacturing method thereof, sounding method thereof and sound effect device

Technical Field

The invention relates to the field of loudspeakers, in particular to a loudspeaker, a paper drum thereof, a manufacturing method thereof and a sounding method thereof. The invention also relates to an audio device, wherein the audio device comprises the loudspeaker and a passive vibrator capable of vibrating and sounding in response to the vibration of the loudspeaker, so as to enhance the low-frequency audio effect of the audio device through the passive vibrator.

Background

Sound devices such as speakers are generally composed of a speaker frame, a paper drum, a voice coil, and a magnetic return system, wherein an outer edge of the paper drum extends to and is connected to the speaker frame, an inner edge of the paper drum extends to and is connected to the voice coil, the voice coil is electromagnetically inductively connected to the magnetic return system, so that when an audio signal is input to the magnetic return system, the magnetic return system electromagnetically drives the voice coil to reciprocate in response to the input of the audio signal, and during the movement of the voice coil, the voice coil drives the paper drum to synchronously reciprocate, thereby generating sound by the air being blown by the paper drum. In order to make the sound device obtain better sound effect, the sound device also provides a flick wave, the inner side edge of the flick wave is connected with the voice coil, the outer side edge of the flick wave is connected with the loudspeaker frame, and the flick wave limits the motion of the voice coil in one direction so as to avoid the phenomenon that the voice coil shakes in the motion process, thereby reducing or even avoiding the noise of the sound device.

In order to ensure the sound effect of the prior art, the drum paper is designed and provided in a circular shape, and the voice coil drives the drum paper to move at the middle position of the drum paper, so that the movement of the drum paper at each position in the circumferential direction is synchronous and uniform in amplitude as much as possible. If the drum paper is designed and provided in a non-circular shape, for example, if the drum paper is designed and provided in a racetrack shape, the racetrack-shaped drum paper will have a long axis direction and a short axis direction, if the voice coil is still arranged at the middle position of the drum paper to drive the drum paper to move, due to the force conduction principle, the forces in the long axis direction and the short axis direction of the drum paper are uneven, for example, the smaller the force of the voice coil drive is applied to the part far from the middle position of the drum paper in the long axis direction, even in extreme cases, especially in the length direction of the drum paper, when the voice coil generates the driving force for the first time to drive the drum paper to move away from the magnetic return system, the driving force will first drive the part of the middle position of the drum paper to move away from the magnetic return system, then the part of the edge position of the drum paper is driven to move away from the magnetic return system when the driving force is conducted to the part of the edge position of the drum paper, and the driving force will first generate the driving force for the second time to drive the drum paper to move toward the middle position of the magnetic return system, the magnetic return system will first occurs when the voice coil generates the driving force for the second time is generated to drive the driving force for the drum paper to move toward the middle position of the drum paper to move toward the middle position. The part of the driving force generated by the voice coil for the first time is conducted to the edge position of the drum paper, and the time of the part of the driving force generated by the voice coil for the second time is the same as that of the part of the driving force generated by the voice coil for the middle position of the drum paper, so that the movement directions of different positions of the drum paper are opposite, on one hand, the amount of the drum paper for driving air can be seriously counteracted, and on the other hand, the uneven movement even wavy deformation in the circumferential direction of the drum paper can be caused, so that the sound quality is seriously reduced. It is understood that the greater the difference between the major axis direction and the minor axis direction of the drum paper, the more remarkable the above-described adverse effect. That is, the prior art sound device can be designed only in a circular shape or a substantially circular shape limited by the structure and circular shape of the drum paper, and such shape limits the expansion of the design concept and application concept of the sound device, thereby making the sound device unable to meet the increasingly personalized design needs in the market.

In addition, the sound size of the sound device is related to the air quantity of the paper drum, and the air quantity of the paper drum is related to the power of the audio signal input to the magnetic return system and the area of the paper drum, for example, on the premise that the area of the paper drum is fixed, the power of the audio signal input to the magnetic return system is increased to enable the paper drum to have a larger stroke, so that the air quantity of the paper drum is increased, and the sound effect of the sound device is improved. Since the drum paper of the sound device in the prior art can only be designed into a circular shape or a substantially circular shape, the effect of increasing the sound of the sound device is achieved only by controlling the power of the audio signal input to the magnetic return system in the prior art, which not only has higher and higher requirements for the power amplifier of the sound device, but also greatly increases the cost of the sound device and the power amplifier of the sound device, and obviously, the method is not accepted and accepted by the market. More importantly, since the stroke of the sound device needs to be increased to possibly increase the air quantity of the drum paper, the size of the sound device becomes larger, which is disadvantageous for the development of the sound device in the direction of lightening and thinning, and for the application of the sound device to electronic equipment pursuing lightening and thinning. For example, in recent years, portable electronic devices such as smartphones have been increasingly developed toward slimness, and such development trend of the sound device has led to counter-development of the sound device and the portable electronic device.

Disclosure of Invention

It is an object of the present invention to provide a paper drum in which a speaker composed of the paper drum allows the volume of the speaker to be increased by increasing the amount of air that the paper drum is capable of blowing without being increased in power of an audio signal to be input.

It is an object of the present invention to provide a drum paper in which the movements of each position in the circumferential direction of the drum paper are synchronized and uniform in magnitude when the drum paper is driven, so that the sound effect of the speaker is purer.

An object of the present invention is to provide a drum in which the shape of the drum is non-circular when viewed from above, and the air amount that is raised when the drum is driven can be increased by increasing the area of the drum as compared with a circular drum of the related art.

An object of the present invention is to provide a paper drum in which the speaker composed of the paper drum allows an increase in the amount of air blown by the paper drum by increasing the area of the paper drum without increasing the stroke of the paper drum, so that the speaker can be developed toward a light and slim direction. That is, even when the stroke of the paper drum of the speaker is limited to a limited range, the sound volume of the speaker can be increased.

An object of the present invention is to provide a paper drum, wherein the paper drum has a first axial direction and a second axial direction, the first axial direction and the second axial direction are perpendicular to each other, and the dimension of the paper drum in the first axial direction is larger than the dimension of the paper drum in the second axial direction, so that the paper drum is non-circular, and thus the paper drum of the present invention can have a larger area than a circular paper drum.

It is an object of the present invention to provide a drum sheet, wherein the drum sheet includes a pair of first portions having opposite extending directions in the first axial direction and a pair of second portions having opposite extending directions in the second axial direction, and each of the first portions and each of the second portions are disposed at a distance from each other, that is, both sides of any one of the first portions are the second portions, and both sides of any one of the second portions are the first portions.

It is an object of the present invention to provide a drum in which the first portion of the drum is sized to be more than twice the size of the second portion or more, e.g. in one embodiment of the present invention the ratio of the size of the first portion to the size of the second portion of the drum is 7:3, even up to 3:1.

It is an object of the present invention to provide a paper drum wherein the first and second portions are curvedly connected and wherein the first and second portions have opposite curvatures at the connection of the first and second portions.

It is an object of the present invention to provide a paper drum in which the paper drum is provided with two pairs of rib members, each pair of the rib members extending radially from a central position to an edge position of the paper drum, and when the paper drum is driven, the central position and the edge position of the paper drum are uniformly stressed by the rib members, so that movement of each position in an axial direction of the paper drum is synchronized and uniform in amplitude.

It is an object of the present invention to provide a paper drum in which the rib members are formed at the junctions of the first and second portions, i.e., the first and second portions are respectively curvedly extended to the rib members.

It is an object of the present invention to provide a paper drum in which the rib member prevents the paper drum from being displaced obliquely if the paper drum is driven in a tendency to be inclined, so that the paper drum can be restricted to reciprocate in only one direction to ensure the sound quality purity of the speaker.

It is an object of the present invention to provide a paper drum wherein the rib members of the paper drum are located at a position lower than the heights of the first portion and the second portion.

It is an object of the present invention to provide a paper drum, wherein the paper drum includes two reinforcing members, each of which is integrally provided at both ends of the first axial direction of the paper drum, respectively, to reinforce the strength of the paper drum at the ends of the first axial direction by the reinforcing members, thereby preventing collapse of the paper drum at the ends of the first axial direction when the paper drum is driven, to secure the reliability of the paper drum.

An object of the present invention is to provide a limiting mechanism, wherein the speaker composed of the limiting mechanism can limit the drum paper to reciprocate only in one direction when being driven, so as to avoid the phenomenon that the drum paper shakes left and right, and ensure the sound effect of the speaker.

It is an object of the present invention to provide a spacing mechanism wherein the spacing mechanism comprises an inner frame, an outer frame and two pairs of limiting elements, each pair of limiting elements extending at both ends to be connected to the inner frame and the outer frame, respectively, wherein each pair of limiting elements is adapted to ensure that the movements of each position of the outer frame are synchronized and of uniform magnitude.

It is an object of the present invention to provide a spacing mechanism in which each pair of the limiting members extends curvedly between the inner and outer brackets, respectively, to increase the stroke of the speaker by increasing the amount of deformation of each pair of the limiting members when the spacing mechanism is driven, so that the sound performance of the speaker can be increased.

It is an object of the present invention to provide a spacing mechanism wherein two of the limiting elements at the ends of the spacing mechanism are symmetrical to each other.

It is an object of the present invention to provide a limiting mechanism, in which the bending directions of two symmetrical limiting elements are opposite or opposite, so as to ensure that the deformation amounts of the two sides of the limiting mechanism are consistent, thereby ensuring the sound effect of the speaker.

It is an object of the present invention to provide a loudspeaker wherein the design of the loudspeaker can be given more flexibility and freedom to expand the application range and application area of the loudspeaker.

It is an object of the present invention to provide a loudspeaker wherein the loudspeaker has the characteristics of low power and high volume.

It is an object of the present invention to provide a loudspeaker whose efficiency is improved over prior art loudspeakers of the same (or equivalent) specification, for example, the efficiency of the loudspeaker can be improved by 10db and the sound pressure of the loudspeaker can be improved by three times or more.

An object of the present invention is to provide a speaker which allows a power amplification unit having a small power to be incorporated therein and which can secure sound volume and quality of the speaker, in such a manner that the manufacturing cost of the speaker and the application cost of the speaker can be reduced.

It is an object of the present invention to provide an audio device in which the bass sound performance of the audio device can be effectively increased.

It is an object of the present invention to provide an audio device, wherein the audio device includes the speaker and a passive vibrator sharing a vibration cavity with the speaker, and when the speaker generates an active audio in response to an input of an audio signal, the passive vibrator vibrates in response to a vibration of the speaker to generate an auxiliary audio, thereby increasing a low frequency audio of the audio device.

It is an object of the present invention to provide an audio device in which the speaker increases the volume of the speaker by increasing the amount of air that the drum paper is made to vibrate, instead of simply increasing the stroke of the speaker, in such a manner that the thickness of the audio device is made thinner, thereby enabling the audio device to be applied to home appliances pursuing light and slim, for example, the audio device can be integrated into an ultra-slim television set.

In order to achieve the above object, the present invention provides a speaker including a support unit, a magnetic return unit, a voice coil, and a drum paper reciprocally moved by the magnetic return unit, an inner side and an outer side of the drum paper being connected to the voice coil and the support unit, respectively, wherein the drum paper has a first axial direction and a second axial direction perpendicular to each other and includes a first portion having opposite extending directions in the first axial direction and a second portion having opposite extending directions in the second axial direction, and a size of the first portion is larger than a size of the second portion, in such a manner that an area of the drum paper of the speaker is effectively increased relative to a circular drum paper of the related art, thereby enabling an increase in volume of the speaker by increasing an air amount of the drum paper when the drum paper is driven by the voice coil paper.

Further, at the junction of the first portion and the second portion of the drum paper, the first portion and the second portion have opposite curvatures, in such a manner that the movements of the drum paper at each position in the circumferential direction of the drum paper when driven by the voice coil are synchronized and uniform in magnitude to secure the sound effect of the speaker. The support unit further includes a speaker frame and a hanging edge which is curvedly extended to be connected to the speaker frame and the outer side portion of the drum paper, so that the hanging edge increases a low frequency sound effect of the speaker while securing a larger stroke of the speaker.

According to another aspect of the present invention, there is provided a drum paper provided between a support unit and a voice coil to be driven by the voice coil to blow air, wherein the drum paper has a first axial direction and a second axial direction perpendicular to each other in an extending direction and includes a first portion having an opposite extending direction in the first axial direction and a second portion having an opposite extending direction in the second axial direction, and a size of the first portion of the drum paper is larger than a size of the second portion, by which an area of the drum paper is larger than an area of a circular drum paper of the related art, thereby enabling an effective increase in an air amount blown by the drum paper when the drum paper is driven by the voice coil. Preferably, the ratio of the size of the first portion to the size of the second portion of the drum paper is at least 7:3.

According to another aspect of the present invention, there is provided a spacing mechanism provided between a support unit and a voice coil to define a direction of movement of the voice coil, wherein the spacing mechanism includes an inner bracket provided to the voice coil, an outer bracket provided to the support unit, and two pairs of limiting members, wherein each pair of limiting members is symmetrically provided such that both ends of each limiting member are connected to the inner bracket and the outer bracket, respectively, in such a manner that the spacing mechanism may be provided in a non-circular shape to be able to match the paper sheet provided in another aspect of the present invention. In addition, each of the limiting members is respectively bent to extend between the inner and outer brackets to increase a stroke of the speaker composed of the limiting mechanism by increasing an amount of deformation of the limiting mechanism, thereby improving low frequency sound quality of the speaker.

According to another aspect of the present invention, there is provided an audio device comprising a speaker and a passive vibrator and having a vibration chamber, the speaker and the passive vibrator sharing the vibration chamber, wherein the speaker is capable of driving the paper-blowing air to generate an audio effect in response to an input of an audio signal, and the passive vibrator is capable of vibrating in response to a vibration of the speaker to generate an auxiliary audio effect, in such a manner that the audio device is capable of generating a better bass audio effect. Preferably, the sound device is particularly suitable for being manufactured as a strip-shaped sound device, such as a horizontal sound device or a vertical sound device, to meet different demands of the market for the sound device.

According to one aspect of the present invention, there is provided a paper drum adapted to be driven by a voice coil to blow air, wherein the paper drum includes a pair of first portions and a pair of second portions connected to each other and having two paper drum ends and two paper drum sides symmetrical to each other, wherein each of the first portions is symmetrically formed at each of the paper drum ends, each of the second portions is symmetrically formed at each of the paper drum sides, and a dimension of the first portions from an inner side to an outer side of the paper drum is larger than a dimension of the second portions from the inner side to the outer side of the paper drum.

According to one embodiment of the invention, each of the first and second portions are integrally formed and have opposite curvatures at the junction adjacent the first and second portions.

According to one embodiment of the invention, each of the first portions and each of the second portions are integrally formed, and the drum paper forms a protrusion or a groove at a junction between adjacent ones of the first portions and the second portions.

According to one embodiment of the invention, the drum further comprises two pairs of rib elements, each of which extends radially from the inner side to the outer side of the drum, wherein one of the first portions is formed on one side of any one of the rib elements and one of the second portions is formed on the other side of the rib element.

According to one embodiment of the invention, the drum paper is racetrack-shaped or oval.

According to one embodiment of the present invention, let the distance dimension parameter between the two paper ends of the paper be L, let the distance dimension parameter between the two paper sides of the paper be W, wherein the ratio range of the distance L between the two paper ends of the paper and the distance W between the two paper sides of the paper be L: w is greater than or equal to 2:1.

According to one embodiment of the present invention, the ratio of the distance L between the two paper ends of the paper drum to the distance W of the two paper side portions of the paper drum is L: w is 7:3.

according to one embodiment of the present invention, the ratio of the distance L between the two paper ends of the paper drum to the distance W of the two paper side portions of the paper drum is L: w is 3:1.

according to one embodiment of the invention, the outer side of the drum paper extends integrally outwards to form a hanging edge.

According to one embodiment of the invention, the shape of the cross section of the overhanging edge is chosen to be: arch, S-shaped, wavy and accordion shaped.

According to one embodiment of the invention, the drum comprises two reinforcing elements, each integrally provided to two of the drum ends of the drum, respectively.

According to one embodiment of the invention, the drum comprises two stiffening elements, each integrally formed in the middle of the first portion.

According to one embodiment of the invention, the reinforcing element is located at a lower portion and an upper portion of the first portion, respectively, at an end near an inner side portion of the drum paper and at an end near an outer side portion of the drum paper.

According to another aspect of the present invention, there is further provided a drum adapted to be driven by a voice coil to move a space, wherein the drum is provided with two pairs of rib members, each pair of rib members radially extending outwardly from an inner side portion of the drum to an outer side portion of the drum, respectively, wherein the inner side portion of the drum is connected to the voice coil such that each rib member makes a stroke of the drum in a circumferential direction from the inner side portion of the drum to the outer side portion of the drum uniform when the voice coil drives the drum to stroke in a stroke direction in a middle portion of the drum.

According to one embodiment of the invention, the paper drum has two paper drum ends symmetrical to each other and two paper drum sides symmetrical to each other, wherein the distance between the two paper drum ends is greater than the distance between the two paper drum sides.

according to one embodiment of the invention, the drum is provided with two reinforcing elements, each integrally formed at both of the drum ends of the drum, respectively.

According to one embodiment of the invention, a first portion is formed between two rib elements located at the paper end of the paper drum, and a second portion is formed between two rib elements located at the paper side of the paper drum, wherein the first portion and the second portion are respectively arched upwards.

According to another aspect of the present invention, there is further provided a limiting mechanism provided between a support unit and a voice coil to limit movement of the voice coil in a vertical axial direction, wherein the limiting mechanism includes:

an inner support, wherein the inner support is connected to the voice coil;

An outer bracket, wherein the outer bracket is connected to the supporting unit; and

two pairs of limiting elements, wherein each pair of limiting elements are symmetrically positioned at two ends of the limiting mechanism respectively, and two ends of each limiting element integrally extend to be connected with the inner bracket and the outer bracket respectively.

According to one embodiment of the invention, each of the limiting elements extends in a curved manner such that both ends of each of the limiting elements extend integrally to connect to the inner and outer brackets, respectively.

According to one embodiment of the invention, the bending directions of the two limiting elements located at the same end of the limiting mechanism are opposite.

According to another aspect of the present invention, the present invention further provides a speaker, comprising:

a supporting unit;

a magnetic return system;

a voice coil, wherein the voice coil reciprocates under the drive of the magnetic return system; and

a drum paper, wherein an inner side portion of the drum paper is connected to the voice coil, an outer side portion of the drum paper is connected to the supporting unit, wherein the drum paper is driven by the voice coil to reciprocate synchronously to generate sound by driving air, wherein the drum paper comprises a pair of first portions and a pair of second portions connected to each other, and two drum paper end portions having mutual symmetry and two drum paper side portions having mutual symmetry, wherein each of the first portions is formed symmetrically at each of the drum paper end portions, each of the second portions is formed symmetrically at each of the drum paper side portions, and a size of the first portions from the inner side portion to the outer side portion of the drum paper is larger than a size of the second portions from the inner side portion to the outer side portion of the drum paper.

According to an embodiment of the present invention, the supporting unit further includes a speaker frame to which the magnetic return system is provided, and a hanging side which is curvedly extended to be connected to the speaker frame and an outer side portion of the drum paper, wherein the hanging side has a tendency and a displacement to return the drum paper to a disposal state.

According to one embodiment of the invention, the hanging edge extends integrally to the outer side of the drum paper.

According to one embodiment of the invention, the loudspeaker further comprises a limiting mechanism, wherein an inner side of the limiting mechanism is connected to the magnetic return system, and an outer side of the limiting mechanism is connected to the supporting unit.

According to one embodiment of the present invention, the limiting mechanism includes an inner bracket connected to the voice coil, an outer bracket connected to the support unit, and two pairs of limiting members each symmetrically located at both ends of the limiting mechanism, and each having both ends integrally extended to be connected to the inner bracket and the outer bracket, respectively.

According to one embodiment of the invention, each of the limiting elements extends in a curved manner such that both ends of each of the limiting elements extend integrally to connect to the inner and outer brackets, respectively. According to one embodiment of the invention, the bending directions of the two limiting elements located at the same end of the limiting mechanism are opposite.

According to one embodiment of the invention, the cross-sectional shape of the limiting mechanism is selected from the group consisting of wavy, U-shaped, inverted U-shaped, arc-shaped and inverted arc-shaped.

According to another aspect of the present invention, there is further provided an audio device comprising at least one passive vibrator and at least one speaker and having a vibration cavity, wherein the speaker and the passive vibrator share the vibration cavity, the passive vibrator vibrating in response to vibrations of the speaker to generate an auxiliary audio when the speaker vibrates to sound in response to an input of an audio signal.

According to another aspect of the present invention, there is further provided a method of manufacturing a speaker, wherein the method comprises the steps of:

(a) Connecting a magnetic return system and a voice coil in an electromagnetic induction way so that the magnetic return system drives the voice coil to do reciprocating motion; and

(b) Connecting an inner side portion of a paper sheet to the voice coil and an outer side portion of the paper sheet to a supporting unit so that the voice coil drives the paper sheet to reciprocate in synchronization, and the supporting unit limits a stroke of the paper sheet, wherein the paper sheet includes a pair of first portions and a pair of second portions connected to each other, each of the first portions being formed symmetrically at each of the paper sheet end portions, and two paper sheet side portions having two paper sheet end portions and two paper sheet side portions being symmetrical to each other, each of the second portions being formed symmetrically at each of the paper sheet side portions, and a size of the first portions from the inner side portion to the outer side portion of the paper sheet is larger than a size of the second portions from the inner side portion to the outer side portion of the paper sheet.

According to an embodiment of the present invention, in the step (b), both sides of a hanging edge are respectively connected to a speaker frame and an outer side portion of the paper drum so that the hanging edge and the speaker frame form the supporting unit and the paper drum is connected to the supporting unit.

According to one embodiment of the present invention, in the step (b), the outer side portion of the drum paper is integrally extended outward to form a hanging edge, and after the hanging edge is connected to a speaker frame, the hanging edge and the speaker frame are formed into the supporting unit and the drum paper is connected to the supporting unit.

According to an embodiment of the present invention, in the above method, further comprising the steps of:

(c) And when the magnetic return system drives the voice coil, the voice coil is limited to reciprocate in the vertical axial direction by the limiting mechanism.

According to another aspect of the present invention, there is further provided a sound producing method of a speaker having a non-circular drum paper, wherein the sound producing method includes the steps of:

(A) When a voice coil is driven by a magnetic return system, the voice coil drives the paper drum to do synchronous reciprocating motion so as to enable the paper drum to drum air to sound; and

(B) When the drum paper has a tendency to tilt in either direction, the drum paper is prevented from being displaced to the side by a plurality of rib members formed on the drum paper, so that the drum paper is kept to reciprocate in the vertical axial direction, thereby improving the sound effect of the speaker.

According to one embodiment of the invention, in said step (B), said paper drum forms four of said rib elements, wherein any adjacent two of said rib elements are symmetrical about the axial direction of said paper drum.

Drawings

Fig. 1 is a schematic perspective view of a speaker according to a preferred embodiment of the present invention.

Fig. 2 is an exploded schematic view of a speaker according to the above preferred embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a speaker according to the above preferred embodiment of the present invention.

Fig. 4A is a perspective view of one view of a drum paper of a speaker according to the above preferred embodiment of the present invention.

Fig. 4B is a perspective view of another view of the drum paper of the speaker according to the above preferred embodiment of the present invention.

Fig. 5A is a schematic sectional view of one position of a drum paper of a speaker according to the above preferred embodiment of the present invention.

Fig. 5B is a schematic sectional view of another position of the drum paper of the speaker according to the above preferred embodiment of the present invention.

Fig. 6 is a perspective view of a modified implementation of a drum paper of a speaker according to the above preferred embodiment of the present invention.

Fig. 7 is an exploded schematic view of a speaker according to still another preferred embodiment of the present invention.

Fig. 8 is a partial perspective view of a speaker according to the above preferred embodiment of the present invention.

Fig. 9A is a schematic cross-sectional view of one direction of a speaker according to the above preferred embodiment of the present invention.

Fig. 9B is a schematic cross-sectional view of another direction of the speaker according to the above preferred embodiment of the present invention.

Fig. 10 is an exploded schematic view of a speaker according to another preferred embodiment of the present invention.

Fig. 11 is a schematic sectional view of a speaker according to the above preferred embodiment of the present invention.

Fig. 12 is a perspective view of a limiting mechanism of a speaker according to the above preferred embodiment of the present invention.

Fig. 13 is a perspective view of an audio device according to a preferred embodiment of the present invention.

Fig. 14 is a schematic cross-sectional view of an acoustic device according to the above preferred embodiment of the present invention.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

Referring to fig. 1 to 6 of the drawings of the specification, a speaker 100 according to a preferred embodiment of the present invention will be explained. The speaker 100 is capable of driving air to generate sound in response to input of an audio signal, wherein the speaker 100 includes a support unit 10, a magnetic return unit 20, a voice coil 30, and a paper drum 40. The magnetic return unit 20 and the voice coil 30 are coupled, for example, the magnetic return unit 20 and the voice coil 30 are electromagnetically inductively coupled, the paper 40 is disposed between the support unit 10 and the voice coil 30, wherein the paper 40 can be driven by the voice coil 30 to drive air to generate sound from the speaker 100, and the support unit 10 is used to limit the stroke of the paper 40 when being driven. It will be appreciated that the greater the amount of air that the paper 40 is inflated at a single time, the greater the volume of the speaker 100.

The paper 40 has an inner side 41 and an outer side 42, wherein the inner side 41 of the paper 40 extends inward to be connected to the voice coil 30, and the outer side 42 extends outward to be connected to the support unit 10 such that the paper 40 is located between the voice coil 30 and the support unit 10, wherein the voice coil 30 is used to drive the paper 40 to blow air, and the support member 10 restricts the stroke of the paper 40.

Preferably, the middle of the drum paper 40 is hollow so that the inner side 41 of the drum paper 40 can be coupled together along the outer circumferential side of the voice coil 30 and the outer circumferential side of the voice coil 30, i.e., the drum paper 40 may have a center perforation.

The magnetic return unit 20 is adapted to be connected to an audio signal source, such as an electronic device like a mobile phone, a music player, etc., and when the magnetic return unit 20 responds to an input of an audio signal from the audio signal source, the magnetic return unit 20 can drive the voice coil 30 to move back and forth along a vertical axial direction according to an electromagnetic induction principle, for example, a z-axis direction shown in fig. 1 is a vertical axial direction defined by the present invention, and the voice coil 30 further drives the paper 40 to move reciprocally along the z-axis direction, so that the paper 40 can drive air in the vertical axial direction to generate sound.

It should be noted that the connection manner between the magnetic return system 20 and the audio signal source is not limited, for example, the magnetic return system 20 and the audio signal source can be connected by a wired or wireless connection manner, so that the magnetic return system 20 can receive and respond to the audio signal radiated by the audio signal source.

In another embodiment of the present invention, the inner side portion 41 of the drum paper 40 extends inward to be connected to the voice coil 30, and the outer side portion 42 of the drum paper 40 may form a free side, i.e., the outer side portion 42 of the drum paper 40 is not connected to the supporting unit 10.

Further, according to fig. 2 and 3, the speaker 100 further includes a limiting mechanism 50, the limiting mechanism 50 is disposed between the support unit 10 and the voice coil 30, the limiting mechanism 50 is capable of being deformed, and the limiting mechanism 50 is used to limit the voice coil 30 to move in the vertical axial direction without being deflected, in such a way that the sound effect of the speaker 100 can be ensured. In this embodiment shown in fig. 3, the limiting mechanism 50 may be a pleated sheet of soft material, and the limiting mechanism 50 may have the ability to deform due to the pleats of the limiting mechanism 50. In another embodiment of the present invention, the limiting mechanism 50 may also be implemented as a smooth sheet or a sheet with hollowed-out shape to provide deformability.

Referring to fig. 1 and 2, the supporting unit 10 includes a speaker frame 11 and a hanging side 12, the magnetic return unit 20 and the limiting mechanism 50 are respectively provided to the speaker frame 11, and both sides of the hanging side 12 are respectively bent to extend so as to be connected to the speaker frame 11 and the outer side 42 of the drum paper 40.

In the present invention, the hanging edge 12 is made of an elastic material, and the hanging edge 12 serves to limit the movement of the drum paper 40 in the vertical axial direction without rattling and tilting. When the drum paper 40 is driven by the voice coil 30 to displace upward in the vertical axial direction, the hanging edge 12 pulls the outer side 42 of the drum paper 40 to cause the drum paper 40 to move downward; similarly, when the drum paper 40 is driven by the voice coil 30 to move and displace downward in the vertical axial direction, the hanging edge 12 pulls the outer side 42 of the drum paper 40 to cause upward trend and displacement of the drum paper 40.

As will be appreciated by those skilled in the art, the voice coil 30 is capable of actively driving the paper 40 in a vertical axial direction with upward or downward tendencies and displacements, and the hanging edge 12 is capable of passively pulling the paper 40 in a vertical axial direction with a return-to-home movement and displacement. It should be noted that the cross-sectional shape of the hanging edge 12 may be an arch, a wave, an S-shape, an inverted U-shape, or a fold shape, and other shapes, and although the cross-section of the hanging edge 12 is shown in fig. 3 as an arch, it will be understood by those skilled in the art that the hanging edge 12 shown in fig. 3 as an arch is merely an example, and does not limit the content and scope of the present invention.

In one embodiment of the present invention, the hanging edge 12 and the drum paper 40 are formed separately and then assembled together, for example, the hanging edge 12 and the outer side 42 of the drum paper 40 may be glued together by glue. In another embodiment of the present invention, the hanging edge 12 and the paper drum 40 can be integrally formed, for example, in a specific embodiment of the present invention, the hanging edge 12 and the paper drum 40 can be integrally formed by an insert injection process, in such a way that, on one hand, the connection between the hanging edge 12 and the paper drum 40 can be more uniformly transited, so that the movement of the paper drum 40 at each position in the circumferential direction is synchronous and uniform in amplitude, thereby ensuring the sound effect of the sound generated by the speaker 100, and on the other hand, when the paper drum 40 is driven by the voice coil 30 to move along the vertical axial direction, the connection between the hanging edge 12 and the paper drum 40 is not easily damaged due to mutual pulling, thereby ensuring the reliability and stability of the speaker 100 when occurring.

The shape of the drum paper 40 of the speaker 100 according to the present invention is non-circular in a plan view, for example, the shape of the drum paper 40 is racetrack-shaped in a plan view according to fig. 4, and the shape of the drum paper 40 is oval in a plan view according to fig. 6, compared to the circular drum paper of the prior art, so that the surface area of the air for the drum paper 40 according to the present invention is effectively increased compared to the circular drum paper of the prior art. It will be appreciated by those skilled in the art that the increase in the surface area of the air that is blown by the paper 40 can increase the volume of the speaker 100 by increasing the amount of air that is blown by the paper 40. That is, the speaker 100 of the present invention of the same specification (e.g., equal or similar power and size) has a larger volume without increasing the power, i.e., the present invention improves the efficiency by increasing the amount of air that the paper 40 is inflated, as compared to the speaker 100 of the related art having a circular shape, for example, in a specific embodiment of the present invention, the efficiency of the paper 40 of the present invention can be improved by 10db, thereby enabling the speaker 100 to increase the sound pressure by 3 times.

In addition, the speaker 100 of the present invention does not need to increase the stroke of the drum paper 40, but increases the amount of air that is blown when the drum paper 40 is driven by increasing the area of the drum paper 40, so as to increase the volume of the speaker 100, thereby enabling the speaker 100 to be developed in a direction of being slim and slim. When the speaker 100 of the present invention and the speaker of the prior art have the same volume, the drum paper 40 of the speaker 100 of the present invention is driven a smaller distance than the drum paper of the speaker of the prior art, that is, the stroke of the drum paper 40 of the speaker 100 of the present invention is smaller, compared to the speaker with circular drum paper of the prior art, in order to facilitate the development of the speaker 100 of the present invention toward the light and slim direction, which is unexpected in the speaker of the prior art, and the manner in which the speaker 100 of the present invention provides is particularly effective for controlling the size of the speaker 100, particularly the thickness size of the speaker 100. The voice coil 30 is disposed at the middle of the paper 40 so that the driving force of the voice coil 30 acting on the paper 40 can be transmitted from the middle position to the edge position of the paper 40, thereby avoiding the adverse phenomena of tilting and shaking of the paper 40 when the paper 40 is driven by the voice coil 30 to move back and forth in the vertical axial direction. For circular paper drums, the matching positions of the voice coil 30 and the paper drum 40 can achieve good effects, while for non-circular paper drums 40 according to the present invention, such as the racetrack paper drums and oval paper drums disclosed in fig. 4 and 6, respectively, the smooth surface provided by the paper drum 40 makes it easy to deviate and shake when driven by the voice coil 30 to move back and forth in the axial vertical direction, which would necessarily adversely affect the sound quality of the speaker 100.

To overcome this technical disadvantage, the paper 40 of the present invention has a first axial direction 401 and a second axial direction 402, the first axial direction 401 and the second axial direction 402 being respectively the x-axis direction and the y-axis direction as shown in fig. 1, the extending direction of the first axial direction 401 and the extending direction of the second axial direction 402 being perpendicular to each other, and the size of the paper 40 in the first axial direction 401 is larger than the size of the paper 40 in the second axial direction 402. For example, in this embodiment of the present invention, the length dimension of the drum 40 in the first axial direction 401 is greater than the length dimension of the drum 40 in the second axial direction 402, such that the drum 40 forms two drum ends 403 in the first axial direction 401 and two drum sides 404 in the second axial direction 402. That is, the drum 40 has two drum ends 403 and two drum sides 404.

Let the distance dimension parameter between the two paper ends 403 of the paper 40 be L, let the distance dimension parameter between the two paper sides 404 of the paper be W, wherein the ratio of the distance L between the two paper ends 403 of the paper and the distance W between the two paper sides 404 is L: w is greater than or equal to 2:1. in a specific example, the ratio of the distance L between the two paper end portions 403 of the paper 40 and the distance W of the two paper side portions 404 is L: w is 7:3. in another specific example, the ratio of the distance L between the two paper end portions 403 of the paper 40 and the distance W of the two paper side portions 404 is L: w is 3:1.

It will be appreciated by those skilled in the art that the surface area of the drum paper 40 for air to be driven of the present invention is effectively increased relative to the circular drum paper of the prior art, so that the amount of air that the drum paper 40 can drive when the drum paper 40 is driven by the voice coil 30 is effectively increased, thereby increasing the volume of the speaker 100. Therefore, it will be understood by those skilled in the art that the present invention increases the volume of the speaker 100 not by increasing the stroke of the drum paper 40 but by increasing the air amount of the drum paper 40 for the agitation, in such a manner that the volume of the speaker 100 can be ensured even if the drum paper 40 has a smaller stroke, thereby enabling the thickness of the speaker 100 to be designed to be thinner to increase the applicable range of the speaker 100.

The paper 40 includes a pair of first portions 43 and a pair of second portions 44 connected to each other, wherein each of the first portions 43 is formed symmetrically with respect to each other in the first axial direction 401 of the paper 40, i.e., each of the first portions 43 is located at each of the paper end portions 403 of the paper 40, respectively, and wherein each of the second portions 44 is formed symmetrically with respect to each other in the second axial direction 402 of the paper 40, i.e., each of the second portions 44 is located at each of the paper side portions 404 of the paper 40, respectively.

Each of the first portions 43 and each of the second portions 44 of the paper drum 40 extend from a middle position to an edge position of the paper drum 40, respectively, that is, each of the first portions 43 and each of the second portions 44 of the paper drum 40 extend from the inner side 41 of the paper drum 40 to the outer side 42 of the paper drum 40, respectively, and a distance by which the first portions 43 extend from the middle position to the edge position of the paper drum 40 is greater than a distance by which the second portions 44 extend from the middle position to the edge position of the paper drum 40, thereby forming the paper drum 40 into a non-circular paper drum.

Preferably, each of the first portions 43 and each of the second portions 44 of the drum paper 40 are integrally formed in such a manner that transition at each position in the circumferential direction of the drum paper 40 is uniform to ensure sound effects of the speaker 100 at the time of occurrence later. At the junction of the first portion 43 and the second portion 44 of the paper 40, the first portion 43 and the second portion 44 have opposite curvatures so that a groove or a protrusion is formed at the junction of the first portion 43 and the second portion 44 of the paper 40, for example, in this embodiment of the present invention, the paper 40 is formed with a groove at the junction of the first portion 43 and the second portion 44 to increase the strength of the paper 40, in such a manner that when the voice coil 30 is acted upon by the magnetic return unit 20 to drive the paper 40 back and forth in the vertical direction, the driving force generated when the voice coil 30 acts on the inner side 41 of the paper 40 is uniformly conducted from the inner side 41 to the outer side 42, so that the paper 40 does not tilt or shake in the vertical axial direction, ensuring the sound-producing of the speaker 100. According to fig. 5A and 5B, the first portion 43 and the second portion 44 of the drum paper 40 are respectively upwardly arched.

The drum paper 40 is provided with two pairs of rib members 45, each pair of rib members 45 extending radially from the inner side portion 41 to the outer side portion 42 of the drum paper 40 for preventing the drum paper 40 from tilting and shifting during the movement in the vertical axial direction by being driven. Specifically, when the drum paper 40 is driven by the voice coil 30 to displace in the vertical axial direction, if the drum paper 40 has a tendency to tilt to one side, the rib member 45 provided to the one side prevents the drum paper 40 from displacing to the one side, so that the drum paper 40 can be displaced only in one direction. For example, when the drum paper 40 is driven by the voice coil 30 to displace in the vertical axial direction, if the drum paper 40 is inclined to the right of the speaker 100, the rib member 45 provided on the right of the drum paper 40 can prevent the drum paper 40 from displacing to the right of the speaker 100, and likewise, if the drum paper 40 is inclined to the left of the speaker 100, the rib member 45 provided on the left of the drum paper 40 can prevent the drum paper 40 from displacing to the right of the speaker 100, by which the displacement direction of the drum paper 40 is limited to move only in the vertical axial direction, whereby the soundness of the speaker 100 can be ensured.

Preferably, each of the rib members 45 is formed between the first portion 43 and the second portion 44, respectively, and each of the rib members 45 is integrally formed with each of the first portion 43 and each of the second portion 44, so that a driving force generated when the voice coil 30 acts on the drum paper 40 can be uniformly conducted from the inner side 41 to the outer side 42 of the drum paper 40.

Further, the paper 40 includes two reinforcing members 46, wherein each of the reinforcing members 46 is integrally provided at both ends of the first axial direction 401 of the paper 40, respectively, that is, each of the reinforcing members 46 is integrally formed at each of the paper end portions 403, respectively, in such a manner that the strength of the paper 40 at the end portions of the first axial direction 401 is reinforced by the reinforcing members 46, thereby preventing collapse of the paper 40 at both ends of the first axial direction 401 when the paper 40 is driven, ensuring the reliability of the paper 40, and improving the sound quality of the speaker 100.

Referring to fig. 7 to 9B, a speaker 100 according to a second preferred embodiment of the present invention is similar to the speaker disclosed in fig. 1 to 6 above, except for the stopper mechanism 50. Specifically, the speaker 100 includes a support unit 10, a magnetic return unit 20, a voice coil 30, a paper drum 40, and a limiting mechanism 50.

The magnetic return unit 20 and the voice coil 30 are connected by electromagnetic induction, the paper 40 is arranged between the supporting unit 10 and the voice coil 30, the limit mechanism 50 is also arranged between the supporting unit 10 and the voice coil 30, wherein the paper 40 and the limit mechanism 50 are respectively connected with two end parts of the voice coil 30, for example, the paper 40 is connected with the upper end part of the voice coil 30, and the limit mechanism 50 is connected with the lower end part or the middle part of the voice coil 30.

The magnetic return unit 20 can generate electromagnetic force to drive the voice coil 30 to drive the drum paper 40 to move up and down, so that the drum paper 40 can be used for driving air to generate sound, and the limit mechanism 50 is used for limiting the voice coil 30 to move along the vertical axial direction, so that the voice coil 30 is prevented from deviation, and in this way, the sound quality of the loudspeaker 100 can be improved.

In this embodiment of the invention, the cross-sectional shape of the spacing mechanism 50 may be "U" shaped such that the spacing mechanism 50 forms a structure similar to the cantilevered edge 12, the cantilevered edge 12 being capable of preventing deflection of the voice coil 30 during operation of the loudspeaker 100 when the voice coil 30 has a tendency to deflect in a vertical axial direction so as to maintain movement of the voice coil 30 in a vertical axial direction. The stopper mechanism 50 may be made of a material that is easily deformable and has good toughness, for example, the material forming the stopper mechanism 50 may be rubber.

In one embodiment of the present invention, the limiting mechanism 50 may be separately supported, and then the inner and outer sides of the limiting mechanism 50 are respectively connected to the voice coil 30 and the support unit 10 by glue or the like. In another embodiment of the present invention, the inner and outer portions of the limiting mechanism 50 may be formed integrally with the voice coil 30 and the support unit 10, respectively, and the inner portion of the limiting mechanism 50 and the voice coil 30 may be formed integrally or the outer portion of the limiting mechanism 50 and the support unit 10 may be formed integrally, for example, by insert injection.

More specifically, only the inner side portion of the stopper mechanism 50 may be integrally formed with the voice coil 30 and then the outer side portion of the stopper mechanism 50 and the support unit 10 may be connected together by glue or the like, or only the outer side portion of the stopper mechanism 50 may be integrally formed with the support unit 10 and then the outer side portion of the stopper mechanism 50 and the voice coil 30 may be connected together by glue or the like.

It will be appreciated by those skilled in the art that in other embodiments, the cross-sectional shape of the stop mechanism 50 may be an inverted "U" shape, or the cross-sectional shape of the stop mechanism 50 may be an arc or an inverted arc.

In addition, the thickness of the inner and outer parts of the limiting mechanism 50 is greater than the thickness of the middle part, that is, the thickness of the connecting position of the limiting mechanism 50 and the voice coil 30 and the thickness of the connecting position of the limiting mechanism 50 and the supporting unit 10 are both greater than the thickness of the limiting mechanism 50 in the middle part, so as to ensure the deformability and resilience of the limiting mechanism 50 while ensuring the connection relationship between the limiting mechanism 50 and the voice coil 30 and the supporting unit 10, respectively. With reference to figures 10 to 12 of the drawings,

the speaker 100 according to the third preferred embodiment of the present invention is similar to the speaker 100 disclosed in the above-mentioned fig. 1 to 6, except that the limiting mechanism 50 of the speaker 100 according to the second preferred embodiment of the present invention further includes an inner bracket 51, an outer bracket 52, and two pairs of limiting members 53, wherein the inner bracket 51 is connected to the voice coil 30, the outer bracket 52 is connected to the speaker frame 11 of the support unit 10, each pair of limiting members 53 is symmetrically disposed at both ends of the limiting mechanism 50, and both ends of each limiting member 53 are respectively extended to be connected to the inner bracket 51 and the outer bracket 52. Each of the limiting members 53 has elasticity so that the voice coil 30 can move the inner support 51 back and forth in the vertical axial direction when driven by the magnetic return unit 20, because the outer support 52 is connected to the speaker frame 11 without moving along with the movement of the inner support 51, so that the limiting mechanism 50 can limit the voice coil 30 to move only in the vertical axial direction without tilting by the outer support 20, and the stroke of the voice coil 30 is limited by the deformability of each pair of the limiting members 53. In addition, when the inner support 51 is biased by the voice coil 30, each pair of the limiting members 53 serves to prevent the inner support 51 from being biased by the voice coil 30, thereby ensuring the pureness of the sound effect of the speaker 100.

Further, each of the limiting members 53 is bent to extend between the inner and outer brackets 51 and 52, respectively, in such a manner that the stroke of each of the limiting members 53 in the vertical axial direction can be increased without weakening the strength thereof in the horizontal direction, that is, the limiting mechanism 50 can limit the movement of the voice coil 30 only in the vertical axial direction while securing a large stroke of the voice coil 30 for driving the drum paper 40, thereby improving the sound effect of the speaker 100. Preferably, the inner bracket 51, the outer bracket 52 and each of the limiting members 53 of the limiting mechanism 50 are implemented as integrally molded to ensure uniformity of thickness dimension transition of the limiting mechanism 50. More preferably, different locations of each of the defining elements 53 may have different thicknesses to enhance the elasticity of the defining elements 53.

Referring to fig. 13 and 14, the present invention further provides an audio device, the audio device includes a speaker 100 and a passive vibrator 200, and a vibration cavity 300 is provided, the speaker 100 and the passive vibrator 200 share the vibration cavity 300, the speaker 100 can drive the drum paper 40 to sound through the voice coil 30 in response to the input of the audio signal output by the audio signal source, and the passive vibrator 200 can vibrate in response to the vibration of the speaker 100 to generate an auxiliary audio effect, in this way, the low frequency audio effect of the audio device can be enhanced.

Further, the sound device further includes a housing 400, the housing 400 forming the vibration chamber 300, and in one embodiment, the speaker 100 and the passive vibrator 200 are disposed at the same side of the housing 400, so that the sound device can sound to the same side, and in another embodiment, the speaker 100 and the passive vibrator 200 are disposed at opposite sides of the housing 400, so that the sound device can sound to both sides.

In addition, since the drum paper 40 may be implemented as a non-circular drum paper, for example, in one embodiment of the present invention, the drum paper 40 is implemented as a racetrack-shaped drum paper, so that the speaker 100 may be implemented as an elongated speaker, and the sound effect device may be elongated when the speaker 100 is combined with the passive vibrator 200 to form the sound effect device, i.e., the sound effect device may be formed as a horizontal sound effect device or a vertical sound effect device, in such a manner that the application range of the sound effect device is effectively widened.

(a) Electromagnetically inductively coupling a magnetic return system 20 and a voice coil 30 such that the magnetic return system 20 drives the voice coil 30 to reciprocate; and

(b) The inner side 41 of a paper 40 is connected to the voice coil 30 and the outer side 42 of the paper 40 is connected to a supporting unit 10 so that the voice coil 30 drives the paper 40 to reciprocate synchronously, and the supporting unit 10 limits the stroke of the paper 40, wherein the paper 40 includes a pair of first portions 43 and a pair of second portions 44 connected to each other and two paper end portions 403 and two paper side portions 404 symmetrical to each other, each of the first portions 43 is symmetrically formed at each of the paper end portions 403, each of the second portions 44 is symmetrically formed at each of the paper side portions 404, and the size of the first portions 43 from the inner side 41 to the outer side 42 of the paper 40 is larger than the size of the second portions 44 from the inner side 41 to the outer side 42 of the paper 40.

Further, in the step (b), both sides of a hanging edge 12 are respectively connected to a speaker frame 11 and an outer side portion 42 of the paper drum 40, so that the hanging edge 12 and the speaker frame 11 form the supporting unit 10 and the paper drum 40 is connected to the supporting unit 10.

Further, in the step (b), the outer side portion 42 of the drum paper 40 is integrally extended outward to form a hanging edge 12, and after the hanging edge 12 is attached to a speaker frame 11, the hanging edge 12 and the speaker frame 11 are formed into the supporting unit 10 and the drum paper 40 is attached to the supporting unit 10.

In addition, the manufacturing method further includes the steps of:

(c) An inner side portion of a limiting mechanism 50 is connected to the voice coil 30 and an outer side portion of the limiting mechanism 50 is connected to the supporting unit 10, so that the voice coil 30 is limited to reciprocate in a vertical axial direction by the limiting mechanism 50 when the voice coil 30 is driven by the magnetic return system 20.

(A) When a voice coil 30 is driven by a magnetic return system 20, the voice coil 30 drives the paper 40 to reciprocate synchronously, so that the paper 40 can blow air to sound; and

(B) When the drum paper 40 has a tendency to tilt in either direction, the drum paper 40 is prevented from being displaced to the side by a plurality of rib members 45 formed on the drum paper 40, so that the drum paper 40 is kept to reciprocate in the vertical axial direction, thereby improving the sound effect of the speaker.

Those skilled in the art will appreciate that the embodiments of the invention shown in the drawings and described above are merely illustrative of the invention and not limiting. It will thus be seen that the objects of the invention are efficiently attained. The embodiments for explaining the functional and structural principles of the present invention have been fully illustrated and described, and the present invention is not limited by the changes based on the principles of the embodiments. Accordingly, the invention includes all modifications encompassed within the scope and spirit of the following claims.

Claims

1. A drum adapted to be driven by a voice coil to blow air, the drum comprising a pair of first and a pair of second portions connected to each other and having two drum ends and two drum sides symmetrical to each other, wherein each of the first portions is symmetrically formed at each of the drum ends, each of the second portions is symmetrically formed at each of the drum sides, and a dimension of the first portions from an inner side to an outer side of the drum is larger than a dimension of the second portions from the inner side to the outer side of the drum, wherein the drum further comprises two pairs of rib members each extending radially from the inner side to the outer side of the drum, respectively, wherein one of the first portions is formed at one side of the rib member and one of the second portions is formed at the other side of the rib member, and the outer side of the drum integrally extends outwardly to form a hanging edge.

2. The drum paper according to claim 1, wherein each of the first and second portions are integrally formed and have opposite curvatures at a junction adjacent the first and second portions.

3. A drum paper according to claim 1, wherein each of the first and second portions are integrally formed, and the drum paper forms a protrusion or a groove at a junction adjacent to the first and second portions.

4. A drum paper according to any one of claims 1 to 3, wherein the drum paper is racetrack-shaped or oval.

5. A paper drum according to any one of claims 1 to 3, wherein a distance dimension parameter between two of the paper drum ends of the paper drum is set to L, a distance dimension parameter between two of the paper drum sides of the paper drum is set to W, wherein a ratio of the distance L between the two paper drum ends of the paper drum to the distance W between the two paper drum sides ranges from L: w is greater than or equal to 2:1.

6. the drum paper according to claim 5, wherein a ratio of a distance L between two of the drum paper ends and a distance W of two of the drum paper sides is L: w is 7:3.

7. The drum paper according to claim 6, wherein a ratio of a distance L between two of the drum paper ends and a distance W of two of the drum paper sides is L: w is 3:1.

8. the drum of claim 1, wherein the cross-sectional shape of the hanging edge is selected to be: arch, S-shaped, wavy and accordion shaped.

9. A drum as claimed in any one of claims 1 to 3, wherein the drum comprises two reinforcing elements, each integrally provided to a respective one of the two drum ends of the drum.

10. A drum as claimed in any one of claims 1 to 3, wherein the drum comprises two reinforcing elements, each integrally formed in a respective central portion of the first portion.

11. A drum paper according to claim 10, wherein the reinforcing elements are located at a lower portion and an upper portion of the first portion, respectively, at an end near an inner side portion of the drum paper and at an end near an outer side portion of the drum paper.

12. A loudspeaker, comprising:

a supporting unit;

a magnetic return system;

A paper drum, wherein an inner side portion of the paper drum is connected to the voice coil, an outer side portion of the paper drum is connected to the supporting unit, wherein the paper drum is driven by the voice coil to reciprocate synchronously to sound by air, wherein the paper drum comprises a pair of first portions and a pair of second portions connected to each other, and two paper drum end portions having mutual symmetry and two paper drum side portions having mutual symmetry, wherein each of the first portions is formed symmetrically at each of the paper drum end portions, each of the second portions is formed symmetrically at each of the paper drum side portions, and a dimension of the first portions from the inner side portion to the outer side portion of the paper drum is larger than a dimension of the second portions from the inner side portion to the outer side portion of the paper drum, wherein the supporting unit further comprises a speaker frame and a suspension edge, the magnetic return system is provided to the speaker frame, and the suspension edge extends curvedly to be connected to the speaker frame and the outer side portion of the paper drum, wherein the suspension edge has a tendency to return the paper drum to a state and a displacement.

13. The speaker of claim 12 wherein the hanging edge integrally extends to an outer side of the drum paper.

14. The speaker of claim 13 wherein the cross-sectional shape of the overhanging edge is selected to: arch, S-shaped, wavy and accordion shaped.

15. The speaker of any one of claims 12 to 14, further comprising a spacing mechanism, wherein an inner side of the spacing mechanism is connected to the magnetic return system and an outer side of the spacing mechanism is connected to the support unit.

16. A loudspeaker according to any one of claims 12 to 14, wherein each of the first and second portions are integrally formed and have opposite curvatures at the junction adjacent the first and second portions.

17. A loudspeaker according to any one of claims 12 to 14, wherein each of the first and second portions are integrally formed and the paper drum forms a projection or recess at the junction adjacent the first and second portions.

18. The speaker as claimed in any one of claims 12 to 14, wherein the drum paper further comprises two pairs of rib members each extending radially from an inner side portion to an outer side portion of the drum paper, respectively, wherein one of the first portions is formed on one side of any one of the rib members and one of the second portions is formed on the other side of the rib member.

19. The speaker as in claim 15 wherein the drum further comprises two pairs of rib elements each extending radially from an inner side to an outer side of the drum, wherein one of the first portions is formed on one side of any one of the rib elements and one of the second portions is formed on the other side of the rib element.

20. A loudspeaker according to any one of claims 12 to 14, wherein the drum paper is racetrack or oval.

21. The speaker according to any one of claims 12 to 14, wherein a distance dimension parameter between two of the paper ends of the paper is set to L, a distance dimension parameter between two of the paper sides of the paper is set to W, wherein a ratio of the distance L between the two paper ends of the paper and the distance W between the two paper sides of the paper is set to L: w is greater than or equal to 2:1.

22. the speaker of claim 21, wherein a ratio of a distance L between two of the drum ends of the drum and a distance W of two of the drum sides is L: w is 3:1.

23. the speaker of claim 15, wherein the limiting mechanism comprises an inner bracket connected to the voice coil, an outer bracket connected to the support unit, and two pairs of limiting members each symmetrically located at both ends of the limiting mechanism, and both ends of each limiting member integrally extend to be connected to the inner bracket and the outer bracket, respectively.

24. The speaker of claim 19, wherein the limiting mechanism comprises an inner bracket connected to the voice coil, an outer bracket connected to the support unit, and two pairs of limiting members each symmetrically located at both ends of the limiting mechanism, and both ends of each limiting member integrally extend to be connected to the inner bracket and the outer bracket, respectively.

25. The speaker of claim 24, wherein each of the defining elements extends in a curved manner such that both ends of each of the defining elements integrally extend to be connected to the inner and outer brackets, respectively.

26. The speaker of claim 25 wherein the bending directions of two of the limiting elements at the same end of the limiting mechanism are opposite.

27. The speaker of claim 15 wherein the cross-sectional shape of the spacing mechanism is selected from the group of shapes consisting of wavy, U-shaped, inverted U-shaped, arcuate, inverted arcuate.

28. An audio device comprising at least one passive vibrator and at least one of said loudspeakers according to any of claims 12 to 27 and having a vibration cavity, wherein said loudspeaker and said passive vibrator share said vibration cavity, said passive vibrator vibrating in response to vibration of said loudspeaker when said loudspeaker vibrates to sound in response to input of an audio signal to produce an auxiliary audio.

29. A method of manufacturing a loudspeaker, the method comprising the steps of:

(b) Connecting an inner side portion of a paper sheet to the voice coil and an outer side portion of the paper sheet to a supporting unit so that the voice coil drives the paper sheet to reciprocate in synchronization, and the supporting unit limits a stroke of the paper sheet, wherein the paper sheet includes a pair of first portions and a pair of second portions connected to each other and having two paper sheet end portions and two paper sheet side portions symmetrical to each other, wherein each of the first portions is formed symmetrically to each of the paper sheet end portions, each of the second portions is formed symmetrically to each of the paper sheet side portions, and a dimension of the first portions from the inner side portion to the outer side portion of the paper sheet is larger than a dimension of the second portions from the inner side portion to the outer side portion of the paper sheet, wherein in the step (b), both sides of a suspension side are connected to a speaker frame and the outer side portion of the paper sheet, respectively, so that the suspension side and the speaker frame form the supporting unit and the paper sheet is connected to the supporting unit.

30. A method of manufacturing a loudspeaker, the method comprising the steps of:

(b) Connecting an inner side portion of a paper sheet to the voice coil and an outer side portion of the paper sheet to a supporting unit so that the voice coil drives the paper sheet to reciprocate in synchronization, and the supporting unit limits a stroke of the paper sheet, wherein the paper sheet includes a pair of first portions and a pair of second portions connected to each other, each of the first portions being symmetrically formed at each of the paper sheet end portions, each of the second portions being symmetrically formed at each of the paper sheet side portions, and a dimension of the first portions from the inner side portion to the outer side portion of the paper sheet being greater than a dimension of the second portions from the inner side portion to the outer side portion of the paper sheet; wherein in the step (b), the outer side portion of the drum paper is integrally extended outward to form a hanging edge, and after the hanging edge is connected to a speaker frame, the hanging edge and the speaker frame are formed into the supporting unit and the drum paper is connected to the supporting unit; (c) And when the magnetic return system drives the voice coil, the voice coil is limited to reciprocate in the vertical axial direction by the limiting mechanism.