TWI491274B - Multi-function micro-speaker (2) - Google Patents

Description

Multifunctional micro speaker (2)

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a multi-functional microspeaker, and more particularly to a multi-functional microspeaker with such an improved structure: when performing an assembly procedure of a multi-functional microspeaker, various constituent members are sequentially stacked in an outer cover and laminated After the components are formed, the upper end portion of the outer cover is crimped and assembled, whereby the assembly procedure can be simplified, the production efficiency can be improved, and the components can be protected from external impact to improve durability.

Typically, a speaker is a device that converts an electrical signal into a sound signal. Microspeakers are small speakers that are mainly used in small-sized audio devices such as mobile phones, notebook computers, MP3 players, and earphones, which have been in great demand in recent years.

However, recent electronic products including microspeakers, particularly mobile communication terminal devices such as mobile phones, constitute a structure for generating a vibration signal. Such a vibration signal is used to replace the incoming call signal or to confirm the input state in a touch screen that directly inputs information to the screen.

The microspeaker according to the present invention is provided with a speaker for generating a vibration signal structure while having a basic function of generating sound. Micro-speakers are called multi-function transmissions or multi-function electronic audio converters.

A conventional microspeaker has a structure in which vibration is obtained by resonating a vibrator supported by a blade spring. In such a conventional microspeaker, a sound coil is provided on a magnetic circuit having a side of a diaphragm which is also called a collecting plate, and audio is output when a current for a sound signal is applied to the sound coil, and a vibration signal is applied to the sound coil. When the current is applied, vibration is generated on the vibrating body.

Fig. 1 shows an example of a conventional microspeaker. Referring to Fig. 1, the microspeaker 100 includes a frame 110, a sounding diaphragm 101, a voice coil 102, a permanent magnet 104 in which an N pole and an S pole are arranged in the upper and lower directions, a flat plate 103, a yoke 105, a suspension 106, and an upper frame 107. .

The upper end portion of the voice coil 102 is fixed to the lower surface of the diaphragm 101. The voice coil 102 is wound in the up and down direction. The flat plate 103 is fixed to the upper surface of the permanent magnet 104, and the permanent magnet 104 is fixed to the bottom surface of the yoke 105, and the yoke 105 is fixed to the suspension 106. The suspension 106 is elastically supported by the frame 110. The yoke 105, the permanent magnet 104, and the flat plate 103 form a magnetic circuit of the speaker.

Next, the operation of the microspeaker 100 having the above configuration will be described.

When a current suitable for audio is applied to the voice coil 102, an electromagnetic force is generated on the voice coil 102, whereby the diaphragm 101 vibrates to output audio.

That is, the magnetic lines of force emitted from the N pole of the permanent magnet 104 sequentially pass through the flat plate 103, the voice coil 102, and the yoke 105 to form a magnetic field toward the S pole of the permanent magnet 104. At this time, when an electromagnetic force is generated on the voice coil 102, an interaction occurs with the magnetic flux generated by the magnetic circuit, and the diaphragm 101 fixed to the voice coil 102 vibrates, thereby realizing a speaker function for outputting audio.

When a current suitable for vibration (normal low-frequency current) is applied to the voice coil 102, a vibration signal is generated by the vertical movement of the magnetic circuit portion (vibrator) including the yoke 105, the permanent magnet 104, and the flat plate 103.

Next, the assembly process of the microspeaker 100 constructed as above will be described.

First, the frame 110 is composed of an upper side wall frame 112 and a lower side wall frame 113 which form side walls, and a bottom frame 111 which forms a bottom surface. The bottom frame 111 is adhered to the lower side wall frame 113, and the outer peripheral portion of the suspension 106 is fixed to the lower side wall frame 113. And, the upper side wall frame 112 is fixed to the upper side of the lower side wall frame 113. Next, the yoke 105, the permanent magnet 104, and the flat plate 103 are bonded and laminated in this order on the suspension 106. Then, the diaphragm 101 is bonded to the upper side edge of the upper side wall frame 112, and the upper side cover 107 is bonded to the upper portion of the diaphragm 101. Usually, the constituent members are bonded by an adhesive, and the constituent members of the metallic material are assembled by welding.

As described above, the conventional microspeaker 100 is required to perform a plurality of programs in order to combine the respective constituent members, and thus is extremely inconvenient. In addition, the assembly procedure is difficult, and it takes a considerable amount of time to assemble, so there is a problem that productivity is lowered.

In particular, as a method of assembling the constituent members, a method of applying an adhesive between the members and hardening them is generally applicable, but since the liquid type adhesive is quantitatively adjusted and adjusted to the correct position, it is difficult. There is a deviation in product characteristics. In addition, in order to solve such a problem, there is a problem that the investment cost of the assembly equipment increases.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a multifunctional microspeaker in which a constituent member of a multi-functional microspeaker is laminated in an outer cover, and an upper end portion of the outer cover is crimped inwardly to be assembled. Thereby, the assembly procedure is simplified, and the constituent members are protected against external impact to improve durability.

In order to achieve the above object, the multifunctional microspeaker of the present invention comprises: a frame; a diaphragm having an outer peripheral portion fixed to the frame; a sound coil fixed to the lower surface of the diaphragm; and a first suspension having elasticity and being on the frame a peripheral portion; a yoke fixed to the first suspension; a first permanent magnet fixed to a bottom surface of the yoke; a plate fixed to the first permanent magnet; and an outer cover There are bottom and side wall portions and are used to receive the frame and the first suspension.

Further, it is preferable that the outer side cover has a curled portion whose upper end portion is curved inward and curled.

Further, preferably, a plurality of air holes are formed in the bottom of the outer cover.

Further, it is preferable that an open groove is formed in a side wall portion of the outer cover so that the frame can protrude.

Further, preferably, the multifunctional microspeaker is formed with an insertion groove along a circumference of the lower surface of the frame.

Further, preferably, the multifunctional microspeaker is formed with a coupling protrusion embedded in the insertion groove along the periphery of the first suspension edge.

In addition, preferably, a first support portion is formed on the first suspension, the first support portion is disposed at equal intervals along the circumference of the edge, and the first support is supported between the frame and the first spacer Suspension.

Further, preferably, the multi-functional microspeaker has an upper frame whose outer peripheral portion is coupled to the diaphragm.

Additionally, preferably, the multifunctional microspeaker has a first spacer bonded to the underside of the first suspension.

In addition, preferably, the multifunctional microspeaker has: a second suspension with an outer peripheral portion coupled under the first spacer; a second magnet coupled to the second suspension; and a peripheral portion coupled under the second suspension The second spacer, the second suspension and the second magnet and the second spacer are received in the outer cover, and the lower surface of the second spacer is coupled to the bottom of the outer cover.

Further, preferably, the first spacer is formed in a ring shape, and the cross section of the first spacer is a quadrangle in which the corner portion is formed as a rounded rounded portion.

Further, preferably, the second suspension has a second support portion which is disposed at equal intervals along the circumference of the edge, and has a bent portion which is bent upward, so that the outer end portion is sandwiched Inside the rounded part.

Further, it is preferable that a second ridge portion that protrudes from the center toward the upper side is formed at the bottom of the outer side cover, and a second ridge insertion portion into which the second ridge portion is fitted is formed in the second magnet.

According to the multi-functional microspeaker of the present invention, the constituent members that constitute the multi-functional microspeaker are housed in the outer cover, and the constituent members are sequentially laminated from the bottom of the outer cover, and the upper end portion of the outer cover is curled inward. The assembly is carried out, so that the manufacturing process can be simplified and the productivity can be improved.

Further, in the procedure of assembling the components, the conventionally used adhesive application procedure is minimized, the program cost is reduced, and the variation in characteristics of the product is minimized, and an environmentally-friendly multifunctional microspeaker can be provided.

Further, since various components of the multi-function microspeaker are maintained in a state of being housed in the outer cover, it is possible to achieve an effect of improving the durability by receiving an external impact.

The microspeaker 1 of the present embodiment is mainly used as a speaker for use in a mobile communication terminal device such as a mobile phone or a small device such as a PMP, and has an audio generating function and a vibration generating function as a signal, in particular, a microspeaker for improving assembly at the time of manufacture. .

Next, a multi-function microspeaker according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 through 7.

2 is an exploded perspective view of a multi-function microspeaker according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of the multi-function microspeaker according to an embodiment of the present invention, and FIG. 4 is an enlarged view of the "A" portion of FIG. In the figure, Fig. 5 is an enlarged view of a portion "B" of Fig. 2, and Fig. 6 is a cross-sectional view taken along line VI-VI of Fig. 2.

Referring to FIGS. 2 and 3, a multi-functional microspeaker 1 according to an embodiment of the present invention includes: a frame 10; a diaphragm 20 having an outer peripheral portion fixed to the frame 10; and a sound coil 30 fixed to the underside of the diaphragm 20; Suspension 40 having elasticity, and having a peripheral portion coupled to the frame 10; a yoke 50 fixed to the first suspension 40; a first permanent magnet 60 fixed to the bottom surface 52 of the yoke 50; A plate 70 above the permanent magnet 60; and an outer cover 90 having a bottom portion 92 and a side wall portion 94 for receiving the frame 10 and the first suspension 40.

The main feature of the present invention is that the components of the multi-function microspeaker 1 are assembled while being stacked in the outer cover 90.

Fig. 2 is a view showing an exploded perspective view of the multi-function microspeaker 1 according to the present invention. As shown in FIG. 2, various components of the microspeaker 1 are housed in the outer cover 90. Fig. 3 is a cross-sectional view showing the state in which the upper end portion of the outer cover 90 is curled after the components of the multi-function microspeaker 1 according to the present invention are stacked and stored in the outer cover 90.

Specifically, the outer cover 90 has a bottom portion 92 and a side wall portion 94, and the frame 10 and the first suspension 40 are housed in a space constituted by the bottom portion 92 and the side wall portion 94. The outer side cover 90 has a curling portion 91 whose upper end portion is bent inward and curled. The outer cover 90 is preferably made of a metal material such as stainless steel or brass. The curling portion 91 of the outer lid 90 is formed by press working, or the outer lid 90 is rotated in one direction, and the upper end portion of the outer lid 90 is pressed inward and curled according to another pressurizing means. achieve.

A vent hole 96 for opening the air generated by the vibration of the first suspension 40 to the outside is formed on the bottom portion 92 of the outer cover 90. When the first suspension 40 vibrates, air flows inside the outer cover 90. Therefore, if the generated air is not ventilated, the vibration of the first suspension 40 is affected. Therefore, it is necessary to pass air to the outside. In the present embodiment, the bottom portion 92 is formed in a circular shape. It goes without saying that the shape of the bottom portion 92 can be deformed into a quadrangular shape or an elliptical shape.

The side wall portion 94 of the outer side cover 90 is formed to be able to surround the frame 10 constituting the multi-function microspeaker 1 and the outer peripheral surface of the first suspension 40. Further, an opening groove 98 is formed in the side wall portion 94 of the outer side cover 90 so that the power supply terminal connecting portion 14 formed on the frame 10 protrudes to the outside of the outer side cover 90.

The frame 10 is typically constructed of plastic. An outer peripheral portion of the diaphragm 20 is coupled to the upper portion of the frame 10. Further, an outer peripheral portion of the upper frame 120 is joined to the upper surface of the diaphragm 20. In the present embodiment, the frame 10 is formed in a cylindrical shape as a whole, and the power supply terminal connecting portion 14 protrudes from a part of the outer peripheral surface in order to supply power from the outside. The power supply terminal connecting portion 14 is fitted into the open groove 98 of the outer cover 90 to protrude to the outside. A lead wire 11 for supplying power to the voice coil 30 and a blade spring 15 connected to the external electric wire are coupled to the power supply terminal connecting portion 14.

In the case of other embodiments, the outer shape of the cross section of the frame 10 may be a quadrilateral shape, an elliptical shape, or a track shape. In each case, the inner member may be appropriately deformed according to its outer shape.

Further, as shown in Fig. 3, an insertion groove 12 is formed along the periphery of the lower surface of the frame 10. A coupling protrusion 42 formed along the circumference of the edge of the first suspension 40 is fitted into the insertion groove 12.

The outer peripheral portion of the diaphragm 20 is fixed to the upper portion of the frame 10. The separator 20 is circular and is usually composed of a polymer compound. The diaphragm 20 vibrates up and down to generate a sound pressure that one can hear.

In the present embodiment, the diaphragm 20 is divided into an inner portion located on the inner side and an outer side portion located on the outer side with reference to the boundary portion of the upper end portion of the acoustic coil 30. The inner portion and the outer portion are respectively formed as domes, and the boundary portions are flat. The outer portion is also referred to as an edge. The diaphragm 20 can be changed in various shapes, materials and thicknesses. shape.

The voice coil 30 is fixed to the underside of the diaphragm 20. The upper end portion of the voice coil 30 is fixed to the lower surface of the boundary portion of the diaphragm 20. The voice coil 30 is configured by winding a wire in the upper and lower directions. The sound coil 30 is supplied with power from the outside.

The lower portion of the sound coil 30 is located in the upper permanent magnet 60 and the flat plate 70 joined to the side wall of the yoke 50 in the upper and lower directions. Such a sandwich space is also referred to as a magnetic gap. When the audio coil 30 flows a high-frequency current for the audio signal, the acoustic coil 30 moves in the vertical direction in accordance with the correlation between the magnetic fields generated by the first permanent magnet 60. Thereby, the diaphragm 20 coupled with the voice coil 30 vibrates to generate audio.

The first suspension 40 has elasticity and has a coupling protrusion 42 and a first support portion 44 and a first ridge portion 46.

The coupling protrusion 42 protrudes upward along the circumference of the edge of the first suspension 40 and is embedded in the insertion groove 12 of the frame 10.

The first support portions 44 are arranged at equal intervals along the circumference of the edge of the first suspension 40. The first support portion 44 supports the first suspension 40 between the frame 10 and the first spacer 80. In the present embodiment, the first support portion 44 is formed in four around the first suspension 40.

The first raised portion 46 is formed to protrude upward from the central portion of the first suspension 40. The first raised portion 46 is fitted into the first raised portion 54 formed in the central portion of the yoke 50. The first raised portion 46 is fitted into the first raised portion 54 to prevent the first suspension 40 from being inclined toward the side wall portion 94 side of the outer cover 90 when the first suspension 40 vibrates.

The first rotating member 40 may be referred to as an elastic member, a spring or a leaf spring or the like. The term "elasticity" refers to a change in volume and shape when a force is applied to an object from the outside, and a property of returning to the original shape when the force is released, and is classified into volume elasticity and shape elasticity according to the type of deformation. In the present invention, the first suspension 40 is primarily related to shape elasticity.

In the present embodiment, the first suspension 40 has a disk shape and is formed in a disk shape in order to correspond to the shape of the frame 10. The first suspension 40 is made of a metal plate such as bronze. Additionally, in other embodiments, the first suspension 40 can be fabricated from a polymeric elastomeric material.

In the present embodiment, the yoke 50 is fixed to a central portion of the upper surface of the first suspension 40. The yoke 50 is bonded to the central portion of the first suspension 40 or bonded to the central portion of the first suspension 40 via a bonding film (not shown). A first permanent magnet 60 is coupled to the bottom surface 52 of the yoke 50, and an upper end portion of the yoke 50 is disposed at a position higher than a lower end portion of the acoustic coil 30. A first ridge insertion portion 54 into which the first swell 40 of the first suspension 40 is fitted is formed at a central portion of the yoke 50.

The first permanent magnet 60 is fixed to the inner bottom surface 52 of the yoke 50 so as to be concentric with the yoke 50. The first permanent magnet 60 is formed in a disk shape in order to correspond to the shape of the yoke 50. The first permanent magnet 60 is adhered to the bottom surface 52 of the yoke 50 or adhered to the bottom surface 52 of the yoke 50 through the adhesive film.

The flat plate 70 is fixed to the upper surface of the first permanent magnet 60. The flat plate 70 is made of a magnetically good material and has almost the same diameter as the first permanent magnet 60. The first permanent magnet 60 is bonded to the flat plate 70 or bonded through the adhesive film.

The first permanent magnet 60 and the flat plate 70 are fixed at a distance from the upper end portion of the yoke 50. A space is formed between the upper ends of the yokes 50 opposed to the outer surfaces of the first permanent magnets 60 and the flat plates 70, and the lower portion of the voice coil 30 is located in the space.

The first permanent magnet 60, the flat plate 70, and the yoke 50 constitute a magnetic circuit of the speaker. That is, the magnetic flux generated by the first permanent magnet 60 forms a magnetic path that enters the yoke 50 through the flat plate 70. When a current suitable for vibration (current of a normal low frequency) is applied to the voice coil 30, a vibration signal is generated based on the vertical movement of the magnetic circuit portion (vibrator) composed of the yoke 50, the first permanent magnet 60, and the flat plate 70.

The first spacer 80 is bonded under the first suspension 40. The first spacer 80 is provided to secure a space between the bottom 92 of the outer cover 90 and the first suspension 40. The first spacer 80 is made of a metal material or a synthetic resin. In the present embodiment, the first spacer 80 is formed in a ring shape corresponding to the outer corner shape of the bottom portion 92 of the outer side cover 90. As shown in Fig. 6, the cross section of the first spacer 80 is formed in a quadrangular shape as a whole, and the corner portion is formed as a rounded portion 82 which is rounded.

Further, the multifunctional microspeaker 1 according to the present invention has a second suspension 130, a second magnet 140, and a second spacer 150.

The second suspension 130 is disposed between the first spacer 80 and the second spacer 150. The upper outer peripheral portion of the second suspension 130 is coupled to the lower surface of the first spacer 80.

Like the first suspension 40, the second suspension 130 also has elasticity, and the second support portion 132 is disposed at equal intervals along the circumference of the edge. The second support portion 132 has a bent portion 132a bent toward the upper side such that the end portion of the second support portion 132 is sandwiched in the rounded portion 82 of the first spacer 80.

In the embodiment, the second suspension 130 is made of the same material as the first suspension 40. However, in other embodiments, the materials of the first suspension 40 and the second suspension 130 may be different from each other.

The second magnet 140 is fixed to the lower surface of the second suspension 130. The central portion of the second suspension 130 protrudes upward to form a space for the second magnet 140 to be coupled. The second magnet 140 is disposed at a distance from the first suspension 40 and the yoke 50.

Regarding the magnetic properties of the second magnet 140 in the vertical direction, the S pole and the N pole may be disposed from top to bottom as needed, or the N pole and the S pole may be disposed from top to bottom. Further, the second magnet 140 may be a permanent magnet or an electromagnet. Further, a second ridge insertion portion 142 into which the second ridge portion 99 of the outer cover 90 is fitted is formed in a central portion of the second magnet 140.

The second magnet 140 and the second suspension 130 function as a vibrator that generates a vibration signal. In the multi-function microspeaker 1 of the present embodiment, the vibrator composed of the second magnet 140 and the second suspension 130 and the magnetic circuit composed of the first permanent magnet 60 and the flat plate 70 and the yoke 50 are spaced apart from each other. However, the magnetic circuit and the vibrator are connected to each other through the magnetic field, and the mutual interference of the vibration of the diaphragm 20 for generating audio and the vibration of the vibrator composed of the second magnet 140 and the second suspension 130 is minimized.

In addition, the second raised portion 99 of the outer cover 90 is embedded in the second raised portion 142 of the second magnet 140, thereby preventing the second suspension 130 from being biased toward the side wall portion of the outer cover 90 when the second suspension 130 vibrates. tilt.

Next, the assembly process and action of the multi-function microspeaker 1 according to the present invention having the above configuration will be described in detail.

The multi-function microspeaker 1 is assembled by laminating constituent members from the bottom portion 92 of the outer cover 90. Specifically, the second spacer 150, the second suspension 130, the first spacer 80, the first suspension 40, the frame 10, the diaphragm 20, and the upper frame 120 are laminated in this order from the bottom portion 92. At this time, the power supply terminal connecting portion 14 of the frame 10 is fitted into the open groove 98 of the outer cover 90.

The yoke 50 is coupled to the upper surface of the first suspension 40, the first permanent magnet 60 is coupled to the bottom surface 52 of the yoke 50, and the flat plate 70 is coupled to the upper surface of the first permanent magnet 60. In addition, the second magnet 140 is coupled to the lower surface of the second suspension 130.

The coupling protrusion 42 of the first suspension 40 is embedded in the insertion groove 12 of the frame 10, and the first support portion 44 of the first suspension 40 supports the first suspension 40 between the frame 10 and the first spacer 80.

In addition, an edge of the second suspension 130 is disposed between the first spacer 80 and the second spacer 150. In addition, the second support portion 132 of the second suspension 130 firmly supports the second suspension 130 between the first spacer 80 and the second spacer 150. The bent portion 132a of the second support portion 132 is caught by the rounded portion 82 of the first spacer 80.

Next, as shown in Fig. 3, the upper end portion of the outer cover 90 is crimped to form the curl portion 91, thereby completing the assembly of the constituent members.

As described above, the multi-functional microspeaker 1 according to the embodiment of the present invention laminates the constituent members in the outer cover 90 in order, and then crimps the upper end portion to assemble the constituent members. Therefore, the manufacturing process can be simplified and the productivity can be improved. Further, since the external impact is absorbed by the outer cover 90, the impact of the constituent members is relieved, thereby providing the multifunctional microspeaker 1 with improved durability.

In addition, in order to secure the space between the first suspension 40 and the second suspension 130 and the space between the second suspension 130 and the bottom 92 of the outer cover 90, the first spacer 80 and the second spacer 150 are used, thereby enabling It is easy to ensure the assembly of the constituent parts while ensuring the space constituting the components.

In addition, in order to stably join the frame 10 and the first suspension 40, the insertion groove 12 is formed on the frame 10, and the coupling protrusion 42 is formed in the first suspension 40, thereby facilitating the combination of the frame 10 and the first suspension 40 even when subjected to In the case of an external impact, the first suspension 40 is also not detached from the frame 10.

Further, the cross section of the first spacer 80 is formed in a quadrangular shape as a whole, and the corner portion is rounded, and the bent portion 132a of the second support portion 132 is sandwiched in the rounded portion 82, whereby the first spacer 80 and The second suspension 130 can also be combined easily and stably.

Further, the air holes 96 formed in the bottom portion 92 of the outer cover 90 enable air to circulate inside and outside the outer cover 90. Air flowing during the vibration of the first suspension 40 and the second suspension 130 circulates through the air holes 96, thereby causing air generated when the first suspension 40 and the second suspension 130 vibrate to flow to the first suspension 40 and the second suspension The vibration of 130 has the least effect.

In addition, the first ridge portion 46 formed on the first suspension 40 and the second protrusion portion 99 formed on the outer cover 90 prevent the first suspension 40 and the second suspension 130 from tilting to one side, thereby preventing the first suspension 40 and the first suspension 40 Two suspension 130 is Burst or perform incomplete vibrations.

Further, the multi-function microspeaker according to the present invention can be implemented in various modifications.

For example, the power supply terminal connecting portion is formed to protrude from the frame used in the embodiment of the present invention, but may be formed to be housed in the outer cover. Further, in the present embodiment, the first support portion is separately formed on the first suspension, but the first support portion may not be formed. Also, the second support portion may not be separately formed on the second suspension. Further, the shape of the first suspension and the second suspension can be changed to various shapes depending on the shape of the bottom of the outer cover. Further, in the present embodiment, the second magnet is coupled to the lower side of the second suspension, but may be coupled to the upper surface of the second suspension.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described above, and various modifications may be made without departing from the scope of the invention. Therefore, the true technical protection scope of the present invention should be defined by the technical idea of the scope of the appended claims.

10. . . frame

11. . . lead

12. . . Embedded slot

14. . . Power supply terminal connection

15. . . Fan leaf spring

20. . . Diaphragm

30. . . Sound coil

40. . . First suspension

42. . . Combined protrusion

44. . . First support

46. . . First ridge

50. . . Yoke

52. . . Bottom

54. . . First ridge embedded part

60. . . First permanent magnet

70. . . flat

80. . . First spacer

82. . . Rounded part

90. . . Outer cover

91. . . Curl

92. . . bottom

94. . . Side wall

96. . . Stomata

98. . . Open slot

99. . . Second ridge

100. . . Micro speaker

101. . . Diaphragm

102. . . Sound coil

103. . . flat

104. . . permanent magnet

105. . . Yoke

106. . . Suspension

107. . . Upper frame

110. . . frame

111. . . Bottom frame

112. . . Upper side frame

113. . . Lower side frame

120. . . Upper frame

130. . . Second suspension

132. . . Second support

132a. . . Bending section

140. . . Second magnet

142. . . Second ridge embedded part

150. . . Second spacer

Fig. 1 is a schematic cross-sectional view of a conventional multi-function microspeaker.

Fig. 2 is an exploded perspective view of the multi-function microspeaker according to an embodiment of the present invention.

Figure 3 is a cross-sectional view of a multi-function microspeaker in accordance with an embodiment of the present invention.

Fig. 4 is an enlarged view of a portion "A" of Fig. 2;

Fig. 5 is an enlarged view of a portion "B" of Fig. 2;

Fig. 6 is a sectional view taken along line VI-VI of Fig. 2;

10. . . frame

12. . . Embedded slot

14. . . Power supply terminal connection

15. . . Fan leaf spring

20. . . Diaphragm

30. . . Sound coil

40. . . First suspension

42. . . Combined protrusion

46. . . First ridge

50. . . Yoke

52. . . Bottom

54. . . First ridge embedded part

60. . . First permanent magnet

70. . . flat

80. . . First spacer

90. . . Outer cover

91. . . Curl

92. . . bottom

96. . . Stomata

99. . . Second ridge

120. . . Upper frame

140. . . Second magnet

150. . . Second spacer

Claims (13)

A multifunctional microspeaker comprising: a frame; a diaphragm fixed to the frame at an outer peripheral portion; a voice coil fixed to the underside of the diaphragm; a first suspension having elasticity, and an outer peripheral portion thereof is coupled to the frame, And a central portion of the first suspension protrudes upward to form a first ridge portion; a yoke fixed to the first suspension; and a central portion of the yoke is formed with a first portion for embedding the first ridge portion of the first suspension a ridge embedding portion; a first permanent magnet fixed to a bottom surface of the yoke; a flat plate fixed to the first permanent magnet; and an outer side cover having a bottom portion and a side wall portion for accommodating the frame and the first suspension. The multi-functional microspeaker according to claim 1, wherein the outer cover has a curled portion in which the upper end portion is bent inward and curled. The multi-functional microspeaker of claim 1, wherein a plurality of air holes are formed in a bottom portion of the outer cover. The multi-functional microspeaker of claim 1, wherein an open groove is formed in a side wall portion of the outer cover so that the frame can protrude. The multi-functional microspeaker of claim 1, wherein the multi-functional microspeaker is formed with an insertion groove along a circumference of the lower surface of the frame. A multi-functional microspeaker as described in claim 5, wherein The multi-function microspeaker is formed with a coupling protrusion embedded in the insertion groove along the periphery of the first suspension edge. The multi-functional microspeaker of claim 1, wherein a first support portion is formed on the first suspension, the first support portion being disposed at equal intervals along the circumference of the edge, and in the frame and The first suspension is supported between the first spacers. The multi-functional microspeaker of claim 1, wherein the multi-functional microspeaker has an upper frame to which an outer peripheral portion is coupled to the diaphragm. The multi-functional microspeaker of claim 1, wherein the multi-functional microspeaker has a first spacer coupled to the underside of the first suspension. The multi-functional microspeaker of claim 9, wherein the multi-functional microspeaker has: a second suspension having a peripheral portion coupled to the underside of the first spacer; and a second magnet coupled to the second suspension; The outer peripheral portion is coupled to the second spacer under the second suspension, the second suspension and the second magnet and the second spacer are received in the outer cover, the lower surface of the second spacer and the bottom of the outer cover Combine. The multi-functional microspeaker of claim 10, wherein the first spacer is formed in a ring shape, and the cross section of the first spacer is a quadrangle in which a corner portion is formed as a rounded rounded portion. The multi-functional microspeaker of claim 11, wherein the second suspension has a second support portion along the side The periphery of the rim is disposed at equal intervals, and has a bent portion that is bent upward, so that the outer end portion of the second support portion is sandwiched in the rounded portion. The multi-functional microspeaker according to claim 10, wherein a second ridge protruding from the center toward the upper side is formed at a bottom portion of the outer cover, and the second ridge is formed on the second magnet An embedded second raised embedding portion.