TWI556657B - A shock absorber for a loudspeaker and a loudspeaker device having the shock absorber - Google Patents

Description

Loudspeaker damper and speaker device having the same Field of invention

The present invention relates to a damper for a speaker and a speaker device having the damper.

Background of the invention

Previously, a speaker device was used in order to be installed in an audio device to emit sound. Such a speaker device vibrates the voice coil, transmits the vibration of the voice coil, and vibrates the diaphragm to generate sound. Further, the voice coil is interposed in a circular corrugated damper and is rotatably held by an element such as a frame.

However, in recent years, the miniaturization of the audio equipment and the advancement of the flat panel have required an elliptical shape or a rectangular shape instead of a circular speaker device, but it is difficult to use a circular corrugation reduction for the speaker device of this shape. Shock absorber. Further, a damper having a planar shape of a rectangular shape has been proposed (for example, refer to Patent Document 1).

Fig. 12 is a perspective view showing a damper of a conventional speaker device.

In the figure, reference numeral 850 denotes a damper of a speaker device, and has a voice coil bonding portion 851 for inserting a voice coil in an interposed manner, and a frame bonding portion 853 for attaching the damper 850 to the frame. Moreover, the voice coil bonding portion 851 and The frame bonding portion 853 is connected by being fixed to both ends of the four support beams 852 formed of linear slats.

Thereby, the planar shape of the damper 850 can be made into an elongated rectangular shape, and the size of the damper 850 in the amplitude direction can be made smaller than the amplitude of the elliptical or rectangular speaker device.

[Patent Document 1] Japanese Patent 实实1-29919号

However, in the conventional speaker device, since the support beam 852 for connecting the voice coil bonding portion 851 and the frame bonding portion 853 is formed of a linear slat, the flexibility is lacking, and the damper 850 as a whole is smooth. The degree of compliance is lowered, and the operation of the voice coil attached to the voice coil bonding portion 851 is hindered. As a result, the vibration of the vibrating plate is affected, and the reproducibility of the sound is lowered.

However, the support beam 852 is formed in a wave plate shape, that is, by imparting the corrugation to increase the flexibility of the support beam 852, the overall smoothness of the damper 850 can be improved.

However, when the support beam 852 is given a corrugation, the thickness direction of the support beam 852, that is, the size of the sound emission direction increases, and the size of the sound absorbing body 850 as a whole is increased, so that it is difficult to use in the sound emission direction. Small, flat-panel speaker unit with a small size.

In order to solve the problem of the conventional speaker device, an object of the present invention is to provide a damper for a speaker and a speaker device having the damper, by forming a pair of vibration sides for connecting the flat damper The connecting portion between the mounting portion and the fixed-side mounting portion can expand and contract the vibration-side mounting portion and the fixed-side mounting portion without increasing the size of the sound-absorbing direction of the damper, and can be disposed in a narrow space. It does not hinder the vibration of the vibrating plate, is easy to manufacture, and has low cost.

Therefore, the damper for a speaker according to the present invention is a damper for a speaker that supports a vibration transmission element, and is slidable in a sound emission direction, and the vibration transmission element vibrates in conjunction with the magnetic circuit portion. The vibration of the driving element is transmitted to the diaphragm, and is flat in an initial state in which no external force is applied, and includes a vibration side mounting portion attached to the vibration transmitting element and a housing for fixing the magnetic circuit portion. a fixed-side mounting portion, a connecting portion for connecting the vibrating-side mounting portion and the fixed-side mounting portion, wherein the connecting portion has a pair of two connected portions of the vibrating side mounting portion and is connected to each of the connecting portions An end portion of the vibration side mounting portion and an end portion connected to the fixed side mounting portion traverse a long axis (α) that passes through a center of the vibration side mounting portion and extends in a longitudinal direction of the vibrating plate, and is located at a relative Side position.

In the other damper for a speaker according to the present invention, the vibrating plate has a flat and elongated planar shape when viewed from the sound emitting side, and the connecting portion has a flat shape in an initial state in which no external force is applied, and It extends while bending in the longitudinal direction of the vibrating plate.

In another damper for a speaker according to the present invention, each of the connecting portions has a substantially S-shaped planar shape.

Another speaker damper according to the present invention, further, said The joint is a strip shape having a constant amplitude and thickness, and the width is W. When the thickness is t, the relationship of W/t≧2 is satisfied.

In another damper for a speaker according to the present invention, the fixed-side mounting portion has a rectangular planar shape including a long side portion extending in a longitudinal direction of the vibrating plate and a width toward the vibrating plate The short side of the direction extends.

In another damper for a speaker according to the present invention, the fixed-side attaching portion has an elongated strip-like planar shape that extends in the width direction of the vibrating plate.

In another damper for a speaker according to the present invention, the fixed-side attaching portion has an elongated strip-like planar shape extending in a width direction of the vibrating plate, and is integrally connected to the casing.

In another damper for a speaker according to the present invention, the housing includes a shutter portion disposed between the magnetic circuit portion and the diaphragm, and the shutter portion is formed to penetrate the shutter portion in a thickness direction. The damper housings the opening, the vibration side mounting portion and the connecting portion are located in the through opening when viewed from the sound emitting side, and the fixed side mounting portion is integrally connected at the periphery of the through opening In the baffle portion.

A speaker device according to the present invention includes a vibrating plate, a driving unit that vibrates the vibrating plate, and a speaker device that serves as a casing for covering the counter-acoustic side of the vibrating plate, the vibrating plate and the basket The body has a narrow and elongated planar shape when viewed from the sound emitting side, and the drive unit includes a magnetic circuit portion, a drive element that vibrates in conjunction with the magnetic circuit portion, and transmits the vibration of the drive element to the device. Vibration of the vibrating plate a moving element, wherein the magnetic circuit portion is held by the housing on an outer side of the housing and on a reverse sound emission side, and the vibration transmission element is interposed between the speaker and the speaker damper on the inner side of the housing It is held in the housing and can vibrate in the sound emitting direction.

The damper for a speaker according to the present invention includes a pair of connecting portions for connecting the vibration side mounting portion and the fixed side mounting portion. Thereby, it is possible to realize expansion and contraction between the vibration side mounting portion and the fixed side mounting portion without increasing the size of the damper in the sound emitting direction, and it is possible to arrange it to a narrow space without disturbing the vibration of the vibration plate, and manufacturing Easy and low cost.

10‧‧‧Speaker device

11‧‧‧Shell

12‧‧‧Side plate department

13‧‧‧ Rear Board

15‧‧‧Connected Road

15a‧‧‧Sound quality adjustment hole

16‧‧‧ Front Board

16a‧‧‧Vibration plate accommodation opening

16b‧‧‧ peripherals

17‧‧‧Magnetic circuit support protrusion

17a‧‧‧Magnetic circuit support convex side

18‧‧‧Magnetic circuit fixing components

18a‧‧‧Magnetic circuit fixing component accommodating recess

18b‧‧‧Adhesive accumulation

21‧‧‧ Rear space

21a‧‧‧ recessed space

34‧‧‧Magnetic circuit housing recess

35‧‧‧End Plate Department

35a‧‧‧Installation Department

35b‧‧‧Fixed plate

35c‧‧‧Installation opening

36‧‧‧The coil passes through the opening

37‧‧‧Baffle Department

37a‧‧‧ Shock absorber connection

38‧‧‧ Shock absorber accommodation opening

40‧‧‧ Magnetic Circuits Department

41‧‧‧ Magnet (magnet)

41a, 42a‧‧‧ center hole

42‧‧‧Metal plate

43‧‧‧ voice coil

44‧‧‧ voice coil skeleton

45‧‧‧Dust cover

46‧‧‧Vibration plate

46a‧‧‧Central opening

46b‧‧‧Vibration plate folding ring

46c‧‧‧gasket

48‧‧ y yoke

48a‧‧‧Center Column

50, 850‧‧ ‧ shock absorbers

51‧‧‧ voice coil skeleton connection

51a‧‧‧Center opening

51b‧‧‧ peripheral openings

52‧‧‧Soft wire

53‧‧‧ terminals

54‧‧‧Leading piece

54a‧‧‧Fixed tablets

55‧‧‧Linked arm

55a‧‧‧First connection end

55b‧‧‧2nd connection end

56‧‧‧Sheet connection

56a‧‧‧Short side

56b‧‧‧Longside

56c‧‧‧Integral connection

851‧‧‧ voice coil bonding

852‧‧‧Support beam

853‧‧‧Frame Fit Department

Fig. 1 is a perspective view of a speaker device according to a first embodiment of the present invention, (a) is a view seen from a sound emitting side, and (b) is a view seen from a reverse sound emitting side.

2 is a two-side view of a speaker device according to a first embodiment of the present invention, (a) is a plan view, and (b) is a cross-sectional view and is a cross-sectional view taken along line A-A of (a).

Fig. 3 is an exploded view of the speaker device according to the first embodiment of the present invention, and is a view as seen from the sound emitting side.

Fig. 4 is an exploded view of the speaker device according to the first embodiment of the present invention, and is a view as seen from the counter playback side.

Fig. 5 is a two-side view of a damper according to a first embodiment of the present invention, (a) being a plan view and (b) being a side view.

Fig. 6 is a view for explaining a shock absorber according to a first embodiment of the present invention. An oblique view of the relationship with the bobbin, (a) is a schematic view of a state in which the voice coil bobbin is mounted on the shock absorber, (b) is a schematic view of the shock absorber, and (c) is a schematic diagram of the voice coil bobbin .

Fig. 7 is a table showing the performance of a damper according to a first embodiment of the present invention, (a) is a table showing the relationship between W/t and the lowest resonance frequency, and (b) is a state in which noise is generated. A table is shown, and (c) is a table showing the relationship between the maximum and minimum values of W/t and the lowest resonance frequency f0.

Fig. 8 is a graph for illustrating the performance of a shock absorber according to a first embodiment of the present invention.

Fig. 9 is a plan view of a damper according to a second embodiment of the present invention.

Fig. 10 is an exploded view of a speaker device according to a third embodiment of the present invention, and is a view as seen from the sound emitting side.

Fig. 11 is an exploded view of a speaker device according to a third embodiment of the present invention, and is a view as seen from the counter playback side.

Fig. 12 is a perspective view showing a damper of a conventional speaker device.

Detailed description of the preferred embodiment

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a speaker device according to a first embodiment of the present invention. In addition, in the figure, (a) is a figure seen from the sound emission side, and (b) is a figure seen from the back sound emission side.

In the figure, 10 is a speaker device according to an embodiment, mounted on An audio generator that reproduces an audio signal is used as a television signal receiving device, a broadcast receiving device, a personal computer, a CD player, a DVD player, a game machine, and the like, and is driven as an audio signal of an electrical signal. The speaker device 10 according to the embodiment can be miniaturized, and therefore, is typically mounted on a flat panel television receiver using a liquid crystal display, a plasma display, etc., a portable personal computer, a PDA (Personal Digital Assistant), a portable game. It is used for flat plates such as machines, small electrical equipment, electronic equipment, etc., but it can also be used in any type of electrical equipment, electronic equipment, and the like.

In addition, in the embodiment, the schematic descriptions of the directions for the configuration and operation of the respective portions of the speaker device 10 for the directions of the upper, lower, left, right, front, and rear are not absolute but relative The speaker device 10 or its components are suitable only in the posture as shown in the figure, and when the posture of the speaker device 10 or its components is changed, it is necessary to interpret according to the change in posture.

Further, the speaker device 10 includes a magnetic circuit unit 40, a driver unit that generates sound by reproducing an audio signal, and a vibration plate 46 by which the magnetic circuit portion 40 is forced to vibrate; the housing 11 It functions as a frame supporting the supporting elements of the magnetic circuit portion 40, the vibrating plate 46, and the like, and also serves as an outer casing surrounding the anti-sounding side of the vibrating plate 46 (opposite side on which the sound is emitted). Enclosure) The function of the enclosure. Further, the drive unit further includes a voice coil 43, a voice coil bobbin 44, and the like which will be described later.

In addition, the speaker device 10 as a whole is from the sound emitting side (sound When the side is viewed, the shape of the projection surface with respect to the plane is, for example, an elongated rectangular shape, or an ellipse or an elliptical shape having a major axis and a minor axis. In other words, the speaker device 10 has a short dimension in the amplitude direction (short axis direction) with respect to the dimension in the longitudinal direction (long axis direction) as a whole.

Further, the casing 11 is typically an element integrally formed of a resin such as synthetic resin, and may be made of a metal such as aluminum, steel or copper, or may be a composite of a resin, carbon, metal, or the like. Material composition. Further, the casing 11 has a front plate portion 16, a side plate portion 12, a rear plate portion 13, and an end plate portion 35, which is a rear plate portion 13 on the reverse sound emission side as a bottom, and a front plate portion 16 on the sound emission side. Most of them are in the form of a bottomed container which is open, and it is a bottomed container-like element having a dimension in the amplitude direction (short axis direction) which is relatively shorter than the length direction (long axis direction). Further, a central portion of the housing 11 in the longitudinal direction of the sound emission side is formed with a magnetic circuit housing recess 34 that is recessed toward the sound emitting side, and the magnetic circuit accommodates the long axis direction of the recess 34. On both sides, a magnetic circuit supporting convex portion 17 projecting toward the counter-prompting side to form a convex portion is provided. Further, the magnetic circuit portion 40 is housed in the magnetic circuit housing recess 34 outside the casing 11.

As described above, since the magnetic circuit portion 40 is exposed outside the casing 11, the heat generated by the magnetic circuit portion 40 can be efficiently released to the outside, and the speaker device 10, particularly the magnetic circuit portion 40, can be prevented from being overheated.

Further, a rear space 21 to be described later is formed inside the magnetic circuit supporting convex portion 17, and a sound quality adjusting hole is formed in at least one of the rear plate portions 13 disposed on both sides of the magnetic circuit receiving concave portion 34. 15a, it is used The outer end of the communication path 15 that communicates with the rear space 21 and the outside of the casing 11 is connected.

Further, a terminal 53 electrically connected to a voice coil 43 to be described later is disposed around the sound quality adjusting hole 15a of the rear plate portion 13. The terminal 53 cooperates with a terminal of the other party to which an audio signal generating device such as an amplifier provided in an electric device or an electronic device equipped with the speaker device 10 is connected, and is used to electrically connect the audio signal generating device. The signal, that is, the audio signal, is transmitted to the voice coil 43 for use. Further, the position of the terminal 53 does not need to be set around the sound quality adjusting hole 15a of the rear plate portion 13, and can be arbitrarily set.

Further, the magnetic circuit unit 40 is provided with a magnet 41 having a rectangular flat shape or a rectangular parallelepiped shape, and a yoke 48 attached to a surface on the counter play side of the magnet 41. The magnet 41 is a permanent magnet formed of a material having a high coercive force, and the yoke 48 is an element for forming a magnetic path, and is formed of, for example, a material having a high magnetic permeability such as soft iron. Further, the magnet 41 of the yoke 48 has a rectangular flat plate shape on the exposed portion on the reverse sound emission side. This portion is formed such that the dimension in the major axis direction is slightly shorter than the dimension in the longitudinal direction of the magnet 41, and the dimension in the minor axis direction is the same as or slightly shorter than the dimension in the minor axis direction of the magnet 41. Further, the magnetic circuit portion 40 has a rectangular parallelepiped shape or a rectangular parallelepiped shape having a low height as a whole, and accommodates the magnetic circuit capacity having a rectangular parallelepiped shape or a substantially rectangular parallelepiped shape. The inside of the recessed portion 34 is installed.

In the state in which the magnetic circuit portion 40 is housed in the magnetic circuit accommodating recess 34, the surface on the reverse sound emission side, that is, the reverse of the yoke 48 The surface on the sound emission side is substantially flush with the surface on the reverse sound emission side of the rear plate portion 13. Further, the magnetic circuit portion 40 has a dimension in the major axis direction that is slightly shorter than the dimension in the long axis direction of the magnetic circuit housing recess 34, and the dimension in the minor axis direction is the short axis direction of the housing 11. The size is the same or slightly shorter, so that it can be surely accommodated in the magnetic circuit accommodating recess 34 without protruding outward from the side plate portion 12.

Thereby, even if the space for mounting the speaker device 10 in the inside of the electric device, the electronic device, or the like is narrow, and the size of the front-rear direction (playing direction) of the casing 11 is not rich, the speaker device 10 can be mounted. use.

Further, the casing 11 has a cantilever-like magnetic circuit fixing member 18 that protrudes toward the reverse sound emission side. The magnetic circuit fixing member 18 is formed with hooks at the free ends and is disposed at both ends of the magnetic circuit housing recess 34 in the longitudinal direction. Further, a magnetic circuit fixing member accommodating recess 18a is formed in a portion of the magnetic circuit supporting convex portion 17 corresponding to the magnetic circuit fixing member 18 for absorbing the outer side of the long-axis direction of the magnetic circuit fixing member 18 to the magnetic circuit accommodating concave portion 34. Displacement. The magnetic circuit portion 40 housed in the magnetic circuit accommodating recess 34 The hook of the magnetic circuit fixing member 18 is hooked to the surface on the reverse sound emission side of the magnet 41, and is locked, so that it cannot be detached from the magnetic circuit housing recess 34. Therefore, the magnetic circuit portion 40 can be easily and surely attached to the casing 11 without using a mounting member such as a screw or a shackle.

A diaphragm accommodation opening 16a to be described later is formed in the front plate portion 16, and a diaphragm 46 is placed in the diaphragm accommodation opening portion 16a. The shape of the vibrating plate 46 relative to the plane of its projection surface is, for example, a slender rectangular shape The shape of the shape or the shape of an ellipse having a long axis and a short axis, a disk shape or the like is set in the short axis direction to be the same as or slightly shorter than the dimension in the short axis direction of the casing 11. Therefore, when viewed from the sound emitting side of the speaker device 10, the front plate portion 16 is present on the outer side in the longitudinal direction of the vibrating plate 46, but the front plate portion 16 is hardly present on the outer side in the short axis direction of the vibrating plate 46. Further, the portion of the front plate portion 16 on the outer side in the longitudinal direction of the diaphragm 46 has an effect of preventing the sound emitted from the reverse sound emission side from flowing back to the partition wall on the sound emission side.

Further, the diaphragm 46 is provided with a central opening 46a formed at the center thereof, a diaphragm folding ring portion 46b integrally connected to the outer peripheral portion, and a gasket integrally connected to the outer periphery of the diaphragm folding portion 46b. Part 46c. The central opening 46a is provided with a dust cover 45 attached to a front end portion of a voice coil bobbin 44 to be described later. Further, the diaphragm flange portion 46b is provided with a cross-sectional shape that is curved to improve flexibility. Further, the planar shape of the diaphragm folding ring portion 46b has a shape such as an ellipse having a long axis and a short axis, a disk shape, or the like. Further, the pad portion 46c is a flat member, and its peripheral shape is a shape in which the four corners of the elongated rectangle are obliquely cut.

Further, the end plate portion 35 has a mounting portion 35a. The attachment portion 35a includes a fixing plate portion 35b that is parallel to the front plate portion 16 and that extends outward from the end plate portion 35 in the longitudinal direction, and a mounting opening portion 35c. The fixing plate portion 35b is a portion that is next to a speaker fixing element (not shown) provided in an electric device, an electronic device, or the like for mounting the speaker device 10. Further, the mounting opening portion 35c is a portion into which a fixing member such as a bolt or a screw is inserted. In addition, the shape and size of the mounting portion 35a may be based on the need to mount the speaker device 10 in a housing such as an electric device or an electronic device. The shape and size of the part are appropriately changed. For example, the diameter of the attachment opening 35c can be changed according to the outer diameter of a fixing member such as a bolt or a screw. Further, the shape and size of the fixing plate portion 35b are changed in accordance with the shape and size of the speaker fixing member provided in the electric device, the electronic device, and the like.

The terminal 53 cooperates with a terminal of the other party to which an audio signal generating device such as an amplifier provided in an electric device or an electronic device equipped with the speaker device 10 is connected, and is used to electrically connect the audio signal generating device. The signal, that is, the audio signal, is transmitted to the voice coil 43 for use. Further, the position of the terminal 53 does not need to be set around the sound quality adjusting hole 15a of the rear plate portion 13, and can be arbitrarily set.

Next, the internal structure of the speaker device 10 will be described.

2 is a two-side view of a speaker device according to a first embodiment of the present invention, and FIG. 3 is an exploded view of the speaker device according to the first embodiment of the present invention, and is a view and a view from the sound emitting side. 4 is an exploded view of the speaker device according to the first embodiment of the present invention, and is a view seen from the counter playback side. In addition, in FIG. 2, (a) is a plan view, (b) is a cross-sectional view, and is a cross-sectional view taken along the line A-A of (a).

As shown, the magnetic circuit portion 40 further includes a metal plate 42 as a top metal plate attached to the sound emitting side of the magnet 41. The metal plate 42 has a rectangular flat plate shape and is an element for forming a magnetic circuit similarly to the yoke 48. For example, it is formed of a material having a high magnetic permeability such as soft iron. In addition, the magnet 41 has a center along its thickness direction (Fig. The center hole 41a penetrating in the vertical direction of the second (b), the metal plate 42 also has a center hole 42a penetrating the center thereof in the thickness direction (the vertical direction in Fig. 2(b)). Further, in a state where the metal plate 42 is attached to the magnet 41, the center hole 41a of the magnet 41 is concentric with the center hole 42a of the metal plate 42. Further, it is preferable that the diameter of the center hole 42a of the metal plate 42 is smaller than the diameter of the center hole 41a of the magnet 41.

Further, the yoke 48 has a cylindrical center post portion 48a extending vertically from the center toward the sound emitting side. Further, in a state where the yoke 48 is attached to the magnet 41, the center post portion 48a is inserted into the center hole 41a of the magnet 41 and the center hole 42a of the metal plate 42. A space formed between the inner circumferential surface of the center hole 42a of the metal plate 42 and the outer circumferential surface of the center pillar portion 48a of the yoke 48 is a magnetic gap, and a voice coil as a coil is disposed in the magnetic gap. 43.

The voice coil 43 is, for example, a cylindrical voice coil bobbin 44 in which a wire formed of a material having high conductivity such as copper is moved forward and backward, that is, in a sound emitting direction (upward direction in FIG. 2( b )). The element formed by winding the outer peripheral surface of the rear end portion functions as a driving element. Further, the entire voice coil 43 has a thin cylindrical shape and is disposed in the magnetic gap so as to be movable in the front-rear direction, that is, in the sound-playing direction.

Further, the voice coil bobbin 44 functions as a vibration transmission element, and is extended from the front end of the voice coil 43 to the front side, and a substantially disk-shaped member-dust cover 45 is connected to the front end portion thereof. . Further, a voice coil bobbin connecting portion 51 that operates as a vibration side mounting portion of the damper 50 is attached to the outer side surface of the voice coil bobbin 44. In addition, a housing connecting portion 56 as a fixed side mounting portion of the damper 50 is attached to the housing 11, and the housing 11 The function of the fixing member for fixing the magnetic circuit portion 40. Thereby, the voice coil 43 does not need to be in contact with the inner peripheral surface of the center hole 42a of the metal plate 42 functioning as a magnetic pole and the outer peripheral surface of the center pillar portion 48a of the yoke 48 on both sides of the magnetic gap. It can keep moving and even vibrating in the playback direction.

In addition, a cord 52 is attached to the voice coil bobbin 44. The cord 52 is an electric wire that transmits an audio signal as an electric signal to the voice coil 43, and one end (not shown) is connected to the voice coil 43, and the other end is connected to the terminal 53. The cord 52 has a long length, but in Figures 3 and 4, only a portion is drawn for convenience of illustration.

Further, a periphery of the central opening 46a of the diaphragm 46 is connected to the outer surface of the voice coil bobbin 44. Further, the vibrating plate 46 is disposed to be located further forward than the damper 50, that is, at the sound emitting side. Further, the pad portion 46c of the diaphragm 46 is formed of a flexible material such as EVA (ethylene-vinyl acetate copolymer resin), and is fixedly attached to the front surface of the casing 11 by a binder. The diaphragm of the plate portion 16 accommodates the peripheral portion 16b of the opening portion 16a. Thereby, the vibrating plate 46 can be held by the front plate portion 16 without dry vibration.

As shown in FIG. 4, the magnetic circuit housing recess 34 is a shutter portion 37 that is parallel to the front plate portion 16 and the rear plate portion 13, and is orthogonal to the shutter portion 37 and extends along the sound emitting direction. The magnetic circuit supports the convex side portion 17a, which is a recess defined by the three sides. Further, a magnetic circuit fixing member 18 extending along the magnetic circuit supporting convex side portion 17a is disposed in the vicinity of the center of each of the magnetic circuit supporting convex side portions 17a.

The baffle portion 37 divides the inside and the outside of the casing 11 A rectangular flat portion is located between the front plate portion 16 and the rear plate portion 13 with respect to the sound emitting direction, and is located with the metal plate 42 located on the sound emitting side of the magnetic circuit portion 40 as the magnetic circuit housing recess 34. The playback side is immediately adjacent. As described above, in the state in which the magnetic circuit portion 40 is housed and mounted in the magnetic circuit housing recess 34, the reverse sound emission side surface and the reverse sound reproduction side surface of the rear plate portion 13 substantially form a face, relative to the playback. In the direction, the distance between the shutter portion 37 and the rear plate portion 13 is substantially equal to the size of the magnetic circuit portion 40 in the thickness direction.

Further, the shutter portion 37 is formed with a coil passing through the opening portion 36 in the thickness direction. As shown in FIG. 2(b), almost the entire voice coil bobbin 44 is closer to the sound emission side than the inside of the casing 11, that is, the shutter portion 37, but at least the rear end portion of the voice coil 43 passes through the opening through the coil. 36 is extended to the reverse sound emission side more than the shutter portion 37, and thus is closer to the magnetic gap on the reverse sound emission side than the shutter portion 37.

Further, a damper connecting portion 37a which is extended to the sound emitting side from the shutter portion 37 as shown in FIG. 3 is formed around the sound emitting side of the shutter portion 37. The case connecting portion 56 of the damper 50 is fixed to the surface on the sound emitting side of the damper connecting portion 37a by an adhesive or the like.

In the present embodiment, the damper 50 is a speaker damper used in the speaker device 10, and is a flat element integrally formed of a resin such as nylon, and has an annular shape, that is, a flange. a voice coil bobbin connecting portion 51; a rectangular annular casing connecting portion 56 for surrounding the voice coil bobbin connecting portion 51; as a connection connecting the voice coil bobbin connecting portion 51 and the casing connecting portion 56 The portion is substantially a pair of S-shaped connecting arm portions 55. In addition, the housing connecting portion 56 includes an extension to the short axis direction of the housing 11. The pair of short side portions 56a and the pair of long side portions 56b extending in the longitudinal direction of the casing 11, and the respective connecting arm portions 55 are connected to the short side portion 56a.

The connecting arm portion 55 is a flat belt-shaped member, but can be formed into a substantially S-shape by a planar shape, whereby flexibility can be exhibited, and an end portion connected to the voice coil bobbin connecting portion 51 is connected to the housing. The interval between the end portions of the short side portions 56a of the portion 56 can be expanded and contracted with respect to the longitudinal direction of the casing 11. Therefore, the voice coil bobbin 44 inserted into the center opening 51a of the voice coil bobbin connecting portion 51 can be moved in the sound emitting direction together with the voice coil 43 and the vibrating plate 46. Thereby, the diaphragm 46 can vibrate without being restrained.

Further, on the sound emitting side surface of the damper 50, a guide piece 54 for guiding the cord 52 and a fixing piece 54a for fixing the cord 52 are formed. Thereby, the cord 52 is held on the surface on the sound emission side of the damper 50. Further, by forming the guide piece 54 in the connecting arm portion 55 and increasing the quadratic coefficient of the connecting arm portion 55, the torsional rigidity of the connecting arm portion 55 can be improved. Further, the guide piece 54 and the fixing piece 54a may be omitted as appropriate.

A rear space 21 that functions as an acoustic space is formed on the reverse sound emission side than the vibration plate 46 in the interior of the casing 11. The rear space 21 passes through the side plate portion 12, the rear plate portion 13, the end plate portion 35, the shutter portion 37, the magnetic circuit supporting convex portion 17a, the vibration plate 46, the voice coil bobbin 44, and the magnetic circuit portion 40. The space after demarcation. Therefore, the casing 11 functions as a casing, and the performance of the speaker device 10 can be sufficiently exerted.

Further, on both sides in the longitudinal direction of the baffle portion 37 in the rear space 21, a surface on the sound emission side of the metal plate 42 which is a surface on the sound emission side of the magnetic circuit portion 40 is formed. The recessed space 21a recessed on the counter-acoustic side. This recessed space 21a is a space corresponding to the internal space of the magnetic circuit supporting convex portion 17. Further, as described above, since the surface on the reverse sound emission side of the magnetic circuit portion 40 and the surface on the reverse sound emission side of the rear plate portion 13 are substantially on one surface, the depth of the concave space 21a, that is, the concave The size in the sound emitting direction of the entrance space 21a is substantially equal to the size of the magnetic circuit portion 40 in the thickness direction.

In this manner, the volume of the rear space 21 can be increased by forming the pair of recessed spaces 21a, and the anti-sounding side can function as an acoustic space more than the diaphragm 46. Therefore, even if the overall size of the speaker device 10 is reduced, the volume of the casing 11 as the outer casing can be increased, that is, the volume of the rear space 21 functioning as an acoustic space can be increased, so that a smooth bass can be reproduced. With clear mid-high notes, the sound is reproducible and the sound quality is improved.

Thereby, the outer shape of the plane of the entire damper 50 can be reduced, and the damper connecting portion 37a of the casing 11 can be downsized. Further, since the long side portion 56b of the case connecting portion 56 is removed, the area of the peripheral opening 51b is actually enlarged, and the movement of the air in the rear space 21 on the reverse sound emission side of the vibrating plate 46 is not affected by the damper 50. Obstruction.

Further, in the embodiment, at least one of the pair of recessed spaces 21a has the communication path 15. In the example shown in the figure, only the recessed space 21a on the right side in Fig. 2(b) is provided with the communication passage 15, but only the recessed space 21a on the left side may have the communication passage 15, and the recesses on the left and right sides may be provided. The entrance space 21a is provided with a communication path 15.

The communication path 15 is extended in the sound emission direction in the concave space 21a, and the reverse sound emission side end portion is a sound quality adjustment hole 15a formed in the rear plate portion 13. In addition, In the example shown in the figure, the shape of the sound quality adjusting hole 15a is substantially T-shaped, but the shape thereof is not limited to a substantially T-shape, and may be any shape. Further, the area of the sound quality adjusting hole 15a can be appropriately set.

Thereby, the rear space 21 which functions as a casing is connected to the outside by the communication path 15 and the sound quality adjustment hole 15a. Therefore, the sound pressure in various frequency bands can be controlled by adjusting the length, the cross-sectional shape, the size of the cross section, and the like of the communication path 15 and the sound quality adjusting hole 15a. In particular, the sound quality at lower frequency bands can be improved.

Next, the configuration of the damper 50 will be described in detail.

5 is a dihedral view of a shock absorber according to a first embodiment of the present invention, and FIG. 6 is a perspective view for explaining a relationship between a shock absorber and a voice coil bobbin according to the first embodiment of the present invention. 7 is a schematic diagram showing the performance of the damper according to the first embodiment of the present invention, and FIG. 8 is a graph for illustrating the performance of the damper according to the first embodiment of the present invention. In addition, in Fig. 5, (a) is a plan view, (b) is a side view, and in Fig. 6, (a) is a schematic view showing a state in which a voice coil bobbin is attached to a damper, and (b) is a schematic view of a damper. (c) is a schematic diagram of the voice coil skeleton. In FIG. 7, (a) is a table showing the relationship between W/t and the lowest resonance frequency, and (b) is a schematic table in a state where noise is generated, (c) A table is shown for the relationship between the maximum and minimum values of W/t and the lowest resonance frequency f0.

As described above, since the guide piece 54 and the fixing piece 54a can be omitted as appropriate, in FIG. 5, the damper 50 in which the guide piece 54 and the fixing piece 54a are omitted is shown as a basic shape.

As shown in FIG. 5, the damper 50 basically does not give an external force. The elliptical shape is a flat element having a thickness t, and has a voice coil bobbin connecting portion 51 having a circular planar shape, a housing connecting portion 56 having a substantially rectangular planar shape, and a substantially S-shaped planar shape. Arm 55. Further, a circular center opening 51a penetrating in the thickness direction of the damper 50 is formed on the inner side of the voice coil bobbin connecting portion 51, and is disposed between the voice coil bobbin connecting portion 51 and the case connecting portion 56. A portion of the connecting arm portion 55 is formed with a peripheral opening 51b that penetrates in the thickness direction of the damper 50. Since air can freely pass through the peripheral opening 51b, the movement of the air in the rear space 21 on the reverse sound emission side of the vibrating plate 46 is not hindered by the damper 50.

Further, in a state where the damper 50 is not attached to the speaker device 10, it is disposed on a plane as shown in FIG. 5(a) such that the long axis α and the short axis of the substantially rectangular case connecting portion 56 are arranged. The intersection of β becomes the center point of the case connecting portion 56, and becomes the center point of the circular voice coil bobbin connecting portion 51 and its central opening 51a. Further, when viewed from the sound emitting side, the long axis α and the minor axis β are substantially perpendicular to the long axis of the vibrating plate 46 having a narrow planar shape and having an elongated planar shape on a plane as shown in Fig. 5(a). The short axes coincide; the intersection of the major axis α and the minor axis β, in the plane shown in Fig. 5(a), substantially coincides with the focal points of the major axis and the minor axis of the vibrating plate 46.

Further, on the plane shown in Fig. 5(a), the connecting arm portion 55 is disposed such that the first connecting end portion 55a connected to the end portion of the voice coil bobbin connecting portion 51 is not on the long axis α and the short axis. At any one of the positions β, the second connection end portion 55b which is the end portion of the short side portion 56a of the case connecting portion 56 is not located at any one of the major axis α and the minor axis β. Further, the first connection end portion 55a and the second connection end portion 55b of each of the connection arm portions 55 are arranged to traverse the long axis α, and is located on the opposite side. That is, the first connecting end portion 55a is connected to the voice coil bobbin connecting portion 51 at a position close to one long side portion 56b, and the second connecting end portion 55b is connected to the short side at a position close to the other long side portion 56b. In the portion 56a, the connecting arm portion 55 crosses the long axis α. Further, the pair of connecting arm portions 55 are arranged to be point-symmetric with respect to each other with respect to the intersection of the major axis α and the minor axis β. Further, the connecting arm portion 55 has a curved shape and is curved, but the center of the curve does not coincide with the center point of the voice coil bobbin connecting portion 51 and its central opening 51a. That is, the connecting arm portion 55 does not form a concentric circle with the voice coil bobbin connecting portion 51. Further, in the direction of the short axis β, the connecting arm portion 55 protrudes outward from the voice coil bobbin connecting portion 51.

Further, on the plane shown in Fig. 5(a), the connecting arm portion 55 has a strip shape, and the width W and the thickness t are substantially constant over the entire range from the first connecting end portion 55a to the second connecting end portion 55b. .

It can be understood from the planar shape of the connecting arm portion 55 as described above that, on the plane shown in FIG. 5(a), since the connecting arm portion 55 is formed too long in the direction of the long axis α, that is, the curved side is curved. It is formed by stretching, and thus is stretchable in the direction of the long axis α. Further, the voice coil bobbin connecting portion 51 is connected to only the left and right short side portions 56a of the case connecting portion 56, only in two places, and is connected to the arm portion 55. Thereby, the distance between the short side portion 56a of the case connecting portion 56 and the voice coil bobbin connecting portion 51 is not restricted by the long side portion 56b or the like, and can be freely expanded and contracted. Therefore, the voice coil bobbin 44 and the voice coil 43 connected to the voice coil bobbin connecting portion 51 can freely move in the sound emitting direction.

Further, since the first connection end portion 55a and the second connection end portion 55b of each of the connection arm portions 55 are disposed so as to traverse the long axis α and are located on the opposite side Therefore, the movement of the voice coil bobbin connecting portion 51 in the direction of the short axis β is restricted, and the displacement of the voice coil bobbin connecting portion 51 in the short axis β direction is prevented. Further, since the voice coil bobbin connecting portion 51 is connected to the right and left short side portions 56a by the pair of connecting arm portions 55, the interval between the voice coil bobbin connecting portion 51 and the left side short side portion 56a, and the voice coil The interval between the skeleton connecting portion 51 and the right short side portion 56a is uniformly maintained, and the displacement of the voice coil bobbin connecting portion 51 in the longitudinal axis α direction is prevented. Therefore, the voice coil bobbin 44 and the voice coil 43 connected to the voice coil bobbin connecting portion 51 are not displaced in the direction perpendicular to the sound emitting direction.

Further, since the width W of the connecting arm portion 55 is larger than the thickness t, the twist of the connecting arm portion 55 is suppressed, and the voice coil bobbin connecting portion 51 does not incline with respect to the plane shown in Fig. 5(a). Therefore, the voice coil bobbin 44 and the voice coil 43 connected to the voice coil bobbin connecting portion 51 do not tilt with respect to the sound emitting direction. Further, the relationship between the amplitude W and the degree t of the connecting arm portion 55 is preferably W/t ≧ 2, more preferably W/t = 2 to 10, still more preferably W/t = 2 to 7 .

Further, the connecting arm portion 55 has a planar shape that is substantially S-shaped and curved, and the first connecting end portion 55a and the second connecting end portion 55b are disposed so as to traverse the long axis α and are located on the opposite side. The position of the voice coil bobbin connecting portion 51 can be suppressed. Therefore, the voice coil bobbin 44 and the voice coil 43 connected to the voice coil bobbin connecting portion 51 do not rotate about their axes.

The inventors of the present invention, while testing the actual machine of the speaker device 10, tested various types of dampers 50 when connecting the arm portions 55 having a relationship between the different amplitudes W and the thickness t, and measured various shock absorbers installed. The acoustic performance of the actual machine of the speaker device 10 of 50 sets the W/t The value.

In particular, the actual machines of the three speaker devices 10, that is, the test machines n1, n2, and n3, were fabricated, and four types of connecting arms having W/t=1, 2, 5, and 7 were replaced on each testing machine. After the damper 50 of the portion 55, the actual minimum resonance frequency f ₀ of each test machine was measured. In addition, the rated output of each test machine is 10 [W], the input impedance is 8 [Ω], the rated power is 8 [V], and the specification value of the lowest resonance frequency f ₀ is 250 [Hz] ± 20 [%]. That is to say, the difference between the maximum value f _{0max of} f ₀ and the minimum value f _0min is allowed to 100 [Hz], so it can be said that the specification value of the lowest resonance frequency f ₀ is 200 to 300 [Hz]. Further, a rated sine wave of 1 [W] (frequency 10 [Hz] to 20 [KHz]) was input to each test machine to measure the impedance, and the frequency corresponding to the peak value of the impedance was made as the lowest resonance frequency f ₀ . measuring. In addition, the environment at the time of measurement was temperature 23.3 [°C], humidity 17 [%], and air pressure 1010 [Hpa].

Fig. 7(a) is a table showing the measurement result as a relationship between W/t and the lowest resonance frequency f ₀ . In the table, the uppermost row, that is, the first row represents the value of W/t, and the second to fourth rows represent the measured values of the lowest resonance frequency f ₀ of the testing machines n1 to n3 corresponding to the respective W/t values. The fifth behavior av indicates the average value of the lowest resonance frequency f ₀ of the testing machines n1 to n3 corresponding to each W/t value, and the sixth behavior max indicates the lowest of the testing machines n1 to n3 corresponding to the respective W/t values. The maximum value of the resonance frequency f ₀ and the seventh behavior min indicate the minimum value of the lowest resonance frequency f ₀ of the testing machine n1 to n3 corresponding to each W/t value, and the lowest line, that is, the eighth behavior f _0max -f _0min Indicates the difference between the maximum value and the minimum value of the lowest resonance frequency f ₀ of the testing machines n1 to n3 corresponding to the respective W/t values.

Further, in the table shown in Fig. 7(a), X indicates that the actual measurement of the lowest resonance frequency f ₀ cannot be performed due to the occurrence of noise, and the calculation of the corresponding average value, minimum value, maximum value, and difference cannot be performed. .

Fig. 7(b) is a table created based on the table shown in Fig. 7(a) and showing a state in which noise has occurred. In the table, OK indicates that the actual measurement of the lowest resonance frequency f ₀ can be performed without generating noise, and NG indicates that the actual measurement of the lowest resonance frequency f ₀ cannot be performed due to the occurrence of noise. From the table shown in Fig. 7(b), it can be known that when W/t = 1, noise is generated. The noise is considered to be a sound in which the voice coil bobbin 44 or the voice coil 43 collides with other components. In other words, when the width W of the connecting arm portion 55 is equal to the thickness t, the voice coil bobbin 44 and the voice coil 43 connected to the voice coil bobbin connecting portion 51 are inclined with respect to the sound emitting direction, and as a result, the sound is made The ring skeleton 44 or the voice coil 43 collides with other components located in the periphery to generate a noise.

Fig. 7(c) is a table created based on the table shown in Fig. 7(a) and showing the relationship between the difference between the maximum value and the minimum value of W/t and the lowest resonance frequency f ₀ . In addition, FIG. 8 is a diagram showing the values of the table shown in FIG. 7(c), in which the horizontal axis represents W/t and the vertical axis represents the difference between the maximum value and the minimum value of the lowest resonance frequency f ₀ . Further, ◆ is a point for indicating the value of the table shown in FIG. 7(c), and the curve is an exponential curve connecting the points, and is a curve created by a method such as a least squares method.

From FIG. 7 (c) and 8 can be known, as the value W / t, the minimum resonance frequency f ₀ and the maximum value of the difference between the minimum will decrease, can be effectively suppressed voice coil bobbin connected to the connector 51 The inclination of the voice coil bobbin 44 and the voice coil 43 in the sound emitting direction. Further, in the case of W/t=2, it is also within the range of the specification value 250 [Hz] ± 20 [%] of the lowest resonance frequency f ₀ . Therefore, it can be said that W/t ≧ 2 is preferable.

As clearly shown in Fig. 6(b), the guide piece 54 of the guide cord 52 and the fixing piece 54a of the fixed cord 52 may be integrally formed on the sound emitting side surface of the damper 50 as needed. Preferably, the guide piece 54 extends along all or a part of the edge of the voice coil bobbin connecting portion 51, the connecting arm portion 55, and the case connecting portion 56, and faces the sound emitting side of the damper 50. Extend and form. Further, a part of the guide piece 54 is further extended to form a single or a plurality of the fixing pieces 54a.

Further, the voice coil bobbin 44 shown in Fig. 6(c) is inserted into the center opening 51a of the voice coil bobbin connecting portion 51 from the sound emitting side of the damper 50, and is fixedly connected as shown in Fig. 6(a). The voice coil bobbin connecting portion 51. The cord 52 is disposed along the guide piece 54 that connects the arm portion 55 and the like, and is fixed to the surface on the sound emitting side of the connecting arm portion 55 or the like by caulking and fixing via the fixing piece 54a.

As such, in the embodiment, the damper 50 supports the voice coil bobbin 44 and is oscillated in the sound emitting direction, and the voice coil bobbin 44 will vibrate the voice coil 43 in conjunction with the magnetic circuit portion 40. The vibration is transmitted to the vibrating plate 46, and is flat in an initial state in which no external force is applied, and includes a voice coil bobbin connecting portion 51 attached to the voice coil bobbin 44, and a housing 11 for fixing the magnetic circuit portion 40. a case connecting portion 56; a connecting arm portion 55 for connecting the voice coil bobbin connecting portion 51 and the case connecting portion 56, and a pair of connecting arm portions 55, each connecting arm portion 55 having a substantially S-shaped planar shape And connected to two places of the voice coil bobbin connecting portion 51, respectively.

Thereby, it is possible to expand and contract the voice coil bobbin connecting portion 51 and the case connecting portion 56 without imparting a corrugation to the connecting arm portion 55, and therefore, It is necessary to increase the size, that is, the thickness of the damper 50 in the sound emitting direction, so that the voice coil bobbin 44 and the voice coil 43 connected to the voice coil bobbin connecting portion 51 can freely move in the sound emitting direction to vibrate. In addition, since the work for imparting corrugations is not required, the damper 50 can be easily manufactured, and the cost can be reduced.

In addition, the vibrating plate 46 has a flat shape in which the width is narrow and elongated when viewed from the sound emitting side, and the connecting arm portion 55 has a flat shape in an initial state in which no external force is applied, and extends in the longitudinal direction of the vibrating plate 46. . Therefore, the connecting arm portion 55 is formed too long in the longitudinal direction of the diaphragm 46 on the plane, and can expand and contract in the longitudinal direction of the diaphragm 46.

Since the connecting arm portion 55 is formed too long in the direction of the long axis α, that is, it is formed while extending along the curved side, it is expandable and contractible in the direction of the long axis α.

Further, in each of the connecting arm portions 55, the first connecting end portion 55a connected to the voice coil bobbin connecting portion 51 and the second connecting end portion 55b connected to the case connecting portion 56 traverse the voice coil bobbin connecting portion 51. The center of the vibration plate 46 extends in the longitudinal direction of the long axis α and is located on the opposite side. Thereby, the operation of the voice coil bobbin connecting portion 51 in the longitudinal direction and the width direction of the vibrating plate 46 is restricted, and the displacement of the voice coil bobbin connecting portion 51 in the longitudinal direction and the width direction of the vibrating plate 46 can be prevented. Therefore, the voice coil bobbin 44 and the voice coil 43 connected to the voice coil bobbin connecting portion 51 are not displaced in a direction perpendicular to the sound emitting direction, and the voice coil 43 is in the magnetic gap and does not overlap with the center hole 42a of the metal plate 42. The inner circumferential surface or the outer circumferential surface of the center pillar portion 48a of the yoke 48 interferes.

Further, the width W and the thickness t of the connecting arm portion 55 are in a constant band shape, and satisfy the relationship of W/t=2 to 7. Thereby, the twist of the connecting arm portion 55 is suppressed, and the voice coil bobbin connecting portion 51 does not face the plane as shown in Fig. 5 (a). When the inclination occurs, the voice coil 43 does not interfere with the inner circumferential surface of the center hole 42a of the metal plate 42 or the outer circumferential surface of the center pillar portion 48a of the yoke 48 in the magnetic gap.

Further, the case connecting portion 56 has a rectangular planar shape, and includes a long side portion extending in the longitudinal direction of the vibrating plate 46 and a short side portion extending in the width direction of the vibrating plate 46. Thereby, the damper 50 can be firmly fixed to the damper connecting portion 37a of the casing 11.

Further, in the embodiment, the speaker device 10 includes the vibration plate 46, a drive unit that vibrates the vibration plate 46, and a casing 11 that functions as a casing that covers the reverse sound emission side of the vibration plate 46, and is viewed from the sound emission side. The vibrating plate 46 and the casing 11 have a flat and elongated planar shape, and the drive unit has a magnetic circuit portion 40, a voice coil 43 that vibrates in conjunction with the magnetic circuit portion 40, and transmits vibration of the voice coil 43 to the vibrating plate 46. The voice coil bobbin 44, the magnetic circuit portion 40 is held on the outer side of the casing 11 and on the reverse sound emission side, and the voice coil bobbin 44 is held inside the casing 11, and is held by the damper 50 according to the embodiment. The housing 11 is movable in the sound emitting direction.

Thereby, the effect of the damper 50 described above is added, and the drive unit and the vibrating plate 46 can be held by the integrally formed casing 11 without the need for other components such as a frame, and the number of parts can be reduced and assembled. It becomes easy to reduce the cost of the speaker device 10. Further, since the housing 11 is integrally formed to cover the reverse sound emission side of the vibration plate 46, the function as the outer casing can be improved, and even if the width is narrow and elongated, the sound reproducibility is good, thereby providing A speaker device 10 having a higher sound quality. Further, since the recessed space 21a which is recessed toward the counter-acoustic side with respect to the surface on the sound emitting side of the magnetic circuit portion 40 is provided, even if the speaker device is reduced The size of the sound emitting direction of 10 can be reduced, and the volume of the casing 11 as the outer casing can be increased, and a smooth bass and a clear mid-high sound can be reproduced, and the sound reproducibility is good, and the sound quality can be improved.

Next, a second embodiment of the present invention will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In addition, the same operation and the same effects as those of the first embodiment will be omitted.

Figure 9 is a plan view of a shock absorber according to a second embodiment of the present invention.

According to the damper 50 of the embodiment, as shown, the housing connecting portion 56 does not have the long side portion 56b, and only the short side portion 56a has only a part. That is, compared with the damper 50 according to the first embodiment, in the damper 50 according to the embodiment, all of the long side portion 56b of the case connecting portion 56 and about half of the short side portion 56a are eliminated. However, the short side portion 56a of the portion where the second connection end portion 55b of each of the connection arm portions 55 is connected is also left.

The configuration of the other points of the damper 50 and the speaker device 10 is the same as that of the first embodiment, and thus the description thereof will be omitted.

As described above, in the damper 50 in the embodiment, the case connecting portion 56 is not rectangular. That is, the case connecting portion 56 has an elongated strip-like planar shape that extends in the width direction of the vibrating plate 46.

Thereby, the outer shape of the plane of the entire damper 50 can be reduced, and the damper connecting portion 37a of the casing 11 can be downsized. Further, since the long side portion 56b of the case connecting portion 56 is removed, the area of the peripheral opening 51b is actually enlarged, and the air in the rear space 21 on the reverse sound emission side of the vibrating plate 46 is provided. The movement is not hindered by the shock absorber 50.

Next, a third embodiment of the present invention will be described. The same components as those of the first and second embodiments are denoted by the same reference numerals, and the description thereof will be omitted. The same operations and effects as those of the first and second embodiments are also omitted.

10 is an exploded view of a speaker device according to a third embodiment of the present invention, and is an exploded view of the speaker device according to a third embodiment of the present invention, and FIG. A picture viewed from the anti-sound side.

The damper 50 according to the embodiment has the same shape as that of the second embodiment, but is formed integrally with the casing 11. Specifically, as shown in the damper 50, the housing connecting portion 56 has only a part of the short side portion 56a, and has no long side portion 56b, and a part of the short side portion 56a is together with the shutter portion 37. It is integrally formed on the damper connecting portion 37a of the shutter portion 37 of the casing 11.

In the example shown in the figure, an integral connecting portion 56c thicker than the other portions of the damper 50 is formed in a part of the short side portion 56a, and the lower end surface of the integral connecting portion 56c (the reverse sound emitting side) The surface is integrally connected to the upper surface (the surface on the sound emission side) of the damper connecting portion 37a.

Further, a damper accommodation opening 38 is formed in the shutter portion 37, the opening of which is larger than the coil passage opening portion 36 according to the first embodiment, and penetrates the shutter portion 37 from the thickness direction. Through the opening. The damper housing opening 38 has a central opening 51a of the damper 50 shown in FIG. 5(a) as described in the first embodiment, which is combined with the peripheral opening 51b. The shape and size of the opening. Therefore, in the embodiment, as shown in FIGS. 10 and 11, the portion of the damper 50 excluding the integral connecting portion 56c is located in the damper housing opening 38 when viewed from the sound emitting side.

Further, since the long side portion 56b of the case connecting portion 56 is omitted, the space between the voice coil bobbin connecting portion 51 and the inner surface of the side plate portion 12 of the casing 11 is increased. In other words, since the side plate portion 12 can be brought close to the voice coil bobbin connecting portion 51, the size of the casing 11 in the width direction can be reduced.

Further, the casing 11 according to the embodiment is not provided with the magnetic circuit fixing member 18, and the magnetic circuit fixing member receiving recess portion 18a is not formed on the magnetic circuit supporting convex portion 17. Thereby, the configuration of the magnetic circuit supporting convex portion 17 and the magnetic circuit receiving concave portion 34 can be simplified, and the casing 11 can be easily manufactured. Further, since the volume of the rear space 21 formed inside the magnetic circuit supporting convex portion 17 is increased, the acoustic performance of the speaker device 10 is improved.

Further, the magnetic circuit portion 40 housed in the magnetic circuit accommodating recess 34 is fixed to the casing 11 by an adhesive. Thereby, the magnetic circuit portion 40 is firmly fixed to the casing 11 and does not come out of the magnetic circuit housing recess 34. Further, an adhesive accumulation groove 18b for accommodating the remaining adhesive is formed on the sound emission side end of the magnetic circuit supporting convex side portion 17a on both sides of the magnetic circuit accommodating concave portion 34 in the longitudinal direction of the casing 11.

The configuration of the other points of the damper 50 and the speaker device 10 is the same as that of the first and second embodiments, and thus the description thereof will be omitted.

As such, the damper 50 in the embodiment has a housing connection The integral connecting portion 56c of the portion 56 is integrally connected to the flap portion 37. In other words, the case connecting portion 56 is provided in an elongated strip-like planar shape that extends in the width direction of the diaphragm 46 and is integrally connected to the casing 11.

Thereby, the outer dimensions of the entire damper 50 on the plane can be reduced, and since the damper 50 is integrated with the casing 11, the work of attaching the damper 50 to the casing 11 is not required, and the reduction is required. The number of parts can reduce the manufacturing cost of the speaker device 10.

Further, the casing 11 includes a shutter portion 37 disposed between the magnetic circuit portion 40 and the vibration plate 46, and the shutter portion 37 is formed with a damper housing opening 38 that penetrates the shutter portion 37 in the thickness direction. The voice coil bobbin connecting portion 51 and the connecting arm portion 55 are located in the damper housing opening 38 when viewed from the sound emitting side, and the housing connecting portion 56 is integrally connected at the periphery of the damper housing opening 38. The baffle portion 37.

Thereby, the damper accommodation opening 38 on both sides of the communication flap portion 37 is increased in size, and the movement of the air in the rear space 21 on the reverse sound emission side of the diaphragm 46 is not hindered by the shutter portion 37.

Further, the present invention is not limited to the embodiments, and various modifications can be made based on the gist of the present invention, but those that cannot be excluded from the scope of the present invention.

Industrial utilization possibility

The present invention is applicable to a speaker device.

10‧‧‧Speaker device

11‧‧‧Shell

12‧‧‧Side plate department

16‧‧‧ Front Board

17‧‧‧Magnetic circuit support protrusion

34‧‧‧Magnetic circuit housing recess

35‧‧‧End Plate Department

35a‧‧‧Installation Department

35b‧‧‧Fixed plate

35c‧‧‧Installation opening

40‧‧‧ Magnetic Circuits Department

45‧‧‧Dust cover

46‧‧‧Vibration plate

46a‧‧‧Central opening

46b‧‧‧Vibration plate folding ring

46c‧‧‧gasket

48‧‧ y yoke

Claims (9)

A damper for a speaker that (a) oscillates a vibration transmitting element in a sound emitting direction, and the vibration transmitting element transmits vibration of a driving element that vibrates in conjunction with a magnetic circuit portion to a vibration plate, (b) a flat plate shape in an initial state in which no external force is applied, and (c) includes a vibration side mounting portion attached to the vibration transmitting element, and is attached to a casing for fixing the magnetic circuit portion. a fixed side mounting portion, a connecting portion for connecting the vibrating side mounting portion and the fixed side mounting portion, and (d) the connecting portion is a pair and is respectively connected to two places of the vibrating side mounting portion, and Each of the connecting portions is connected to an end portion of the vibrating side mounting portion and an end portion connected to the fixed side mounting portion, and has a long axis extending through a center of the vibrating side mounting portion and extending in a longitudinal direction of the vibrating plate. And each other is on the opposite side. The damper for a speaker according to the first aspect of the invention, wherein the vibrating plate has a narrow and elongated planar shape when viewed from the sound emitting side, and the connecting portion is in an initial state in which no external force is applied. It is flat and curved and extends in the longitudinal direction of the vibrating plate. The damper for a speaker according to claim 1 or 2, wherein each of the connecting portions has a substantially S-shaped planar shape. The damper for a speaker according to claim 1 or 2, wherein the connecting portion has a strip shape having a constant amplitude and a thickness, and has an amplitude of W, and when the thickness is t, satisfies W/t≧2. relationship. The damper for a speaker according to claim 1 or 2, wherein the fixed-side mounting portion has a rectangular planar shape including a long side portion extending in a longitudinal direction of the vibrating plate A short side portion extending in the width direction of the vibrating plate is described. The damper for a speaker according to the first or second aspect of the invention, wherein the fixed-side mounting portion has an elongated strip-like planar shape extending in a width direction of the vibrating plate. The damper for a speaker according to claim 1 or 2, wherein the fixed-side mounting portion has an elongated strip-like planar shape extending in a width direction of the vibrating plate, and is integrally connected In the housing. The damper for a speaker according to the seventh aspect of the invention, wherein the housing includes a baffle portion disposed between the magnetic circuit portion and the vibrating plate and formed to penetrate in a thickness direction a through opening of the baffle portion, wherein the vibrating side mounting portion and the connecting portion are located in the through opening when viewed from a sound emitting side, and the fixed side mounting portion is in the The periphery of the opening is integrally connected to the baffle portion. A speaker device comprising: (a) a vibrating plate; a driving unit for vibrating the vibrating plate; and a casing for covering a function of a counter-sounding side of the vibrating plate, (b) The vibrating plate and the casing have a narrow and elongated planar shape when viewed from the sound emitting side, and (c) the driving unit includes a magnetic circuit portion and a driving element that vibrates in conjunction with the magnetic circuit portion to The vibration of the driving element is transmitted to the vibration transmitting element of the vibrating plate, and (d) the magnetic circuit portion is outside the casing and supported by the casing on the reverse sound emitting side, (e) the vibration The transmission element is slidable to the housing in a sound-absorbing direction in a sound-absorbing direction by the speaker damper according to any one of claims 1 to 8 on the inner side of the casing.