Diaphragms, speakers, and electronic equipment

Abstract

We provide diaphragms that reproduce high-quality sound, as well as speakers and electronic devices equipped with them. [Solution] In the speaker, the diaphragm 10 comprises a movable part 11 whose entire surface can be displaced vertically relative to its entire surface, first fixed parts 12 to third fixed parts 14 arranged corresponding to the four sides of the movable part 11, and first elastic deformation parts 15 to third elastic deformation parts 17 that connect the movable part 11 and the first fixed parts 12 to third fixed parts 14, respectively. Therefore, by elastically deforming the first elastic deformation parts 15 to third elastic deformation parts 17, the movable part 11 can be displaced well vertically relative to its entire surface. As a result, the load on the movable part 11 when it is displaced is reduced, and the entire movable part 11 can be displaced uniformly and parallel, so that high-quality sound can be reproduced at low cost.

Description

Technical Field

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[0001] The present invention relates to a diaphragm used for a planar speaker, a speaker including the same, and an electronic device.

Background Art

[0002] For example, in a diaphragm used for a speaker, as described in Patent Document 1, there is known a structure including a rectangular diaphragm main body and a deformed portion called an edge provided around the diaphragm main body, and the deformed portion is attached to the diaphragm main body with an adhesive.

Prior Art Document

Patent Document

[0003]

Patent Document 1

[0004] In such a diaphragm, slits are provided at respective corners of the deformed portion provided around the diaphragm main body by die-cutting or punching, and the diaphragm main body is configured to vibrate by the deformation of the deformed portion due to these plurality of slits.

Summary of the Invention

[0008] This invention makes it possible to reproduce high-quality sound. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view of a speaker incorporating this invention, seen from the front. [Figure 2] Figure 1 is a perspective view of the speaker shown, viewed from the rear. [Figure 3] This is an enlarged cross-sectional view of the speaker shown in Figure 1, taken along the AA line. [Figure 4] Figure 1 is a perspective view showing the internal structure of the front unit of the speaker. [Figure 5] Figure 4 shows the front yoke and front magnet plate in the front unit, where (a) is a perspective view showing the front yoke and (b) is a perspective view showing the front magnet plate. [Figure 6] Figure 5(b) shows the magnetization state of the magnetic poles on the front magnetic plate. [Figure 7] Figure 2 is a perspective view showing the internal structure of the rear unit of the speaker. [Figure 8] Figure 7 is a perspective view showing the rear yoke of the rear unit. [Figure 9] Figure 7 is a perspective view showing the rear unit with the diaphragm attached. [Figure 10] Figure 9 is an enlarged perspective view showing the diaphragm. [Figure 11]Figure 3 shows the state in which the movable part of the diaphragm of the speaker is displaced. (a) is an enlarged cross-sectional view of the main part showing the state in which the movable part is displaced toward the front magnet plate, and (b) is an enlarged cross-sectional view of the main part showing the state in which the movable part is displaced toward the rear magnet plate. [Figure 12] This is a perspective view showing a first modified example in which a diaphragm to which this invention is applied is attached to a frame. [Figure 13] This is an enlarged plan view of the main part showing a second modified example of the elastically deformable portion of a diaphragm to which this invention is applied. [Modes for carrying out the invention]

[0010] Hereinafter, an embodiment of a speaker to which this invention is applied will be described with reference to Figures 1 to 11. As shown in Figures 1 and 2, this speaker 1 comprises a front unit 2 and a rear unit 3. The front unit 2 comprises a front case 4, as shown in Figures 3 and 4. This front case 4 comprises a front portion 4a and a frame-shaped first side wall portion 4b, and is formed in the shape of a thin rectangular box that is open to the rear (downward in Figure 3).

[0011] In this case, a rectangular front opening 4c is provided in the center of the front portion 4a of the front case 4, as shown in Figures 1 and 3. This front opening 4c is formed so that its vertical length is slightly longer than half the vertical length of the front portion 4a, or slightly shorter than half, and its horizontal length is slightly longer than half the horizontal length of the front portion 4a, or slightly shorter than half. As a result, the opening area of ​​the front opening 4c is approximately 2 / 5 to 3 / 5 the size of the entire area of ​​the front portion 4a.

[0012] Further, as shown in FIG. 1, a plurality of front reinforcing ribs 4d that cross the front opening 4c in the vertical and horizontal directions are provided in a lattice pattern on the front surface portion 4a of the front case 4. Further, as shown in FIG. 4, the frame-shaped first side wall portion 4b of the front case 4 is provided continuously to the four sides of the front surface portion 4a. A plurality of semi-cylindrical first case attachment portions 4e are provided on the outer surface of this frame-shaped first side wall portion 4b.

[0013] Inside this front case 4, as shown in FIGS. 3 and 4, a front yoke 5 which is a magnetic plate and a front magnet plate 6 are attached in a state of overlapping each other. The front yoke 5 is one through which a magnetic field easily passes, and is formed in a thin flat plate shape with an area slightly wider than the front opening 4c by a magnetic material such as stainless steel.

[0014] A plurality of first screw attachment portions 5a are provided respectively at the upper and lower portions and the middle portion of the lower side at both sides of this front yoke 5, as shown in FIGS. 4 and 5(a). Thereby, the front yoke 5 is attached from the front side of the front surface portion 4a shown in FIG. 1 by a plurality of first screws 5b to the inner surface of the front case 4 at the plurality of first screw attachment portions 5a.

[0015] Also, as shown in FIG. 5(a), a large number of first ventilation holes 5c are provided in the front yoke 5 in a vertical and horizontal arrangement. Further, as shown in FIGS. 4 and 5(a), a connection support portion 5d extends from the middle portion of the upper side portion of this front yoke 5 toward the first side wall portion 4b on the upper side of the front case 4. This connection support portion 5d supports the connection portion 18 of the diaphragm 10 described later.

[0016] The front magnet plate 6 is formed in a rectangular flat plate shape having substantially the same size as the front yoke 5, as shown in FIGS. 3 to 5(b), and is screwed in a state of overlapping the inner surface of the front yoke 5. A large number of second ventilation holes 6a are provided in this front magnet plate 6, similar to the front yoke 5. Further, as shown in FIG. 6, the front magnet plate 6 is magnetized in a state where a large number of N-pole and S-pole magnetic poles are arranged along the vertical direction corresponding to the wiring pattern 20 of the diaphragm 10 described later.

[0017] On the other hand, as shown in FIGS. 2, 3, and 7, the rear unit 3 includes a rear case 7. This rear case 7, similar to the front case 4, includes a rear surface portion 7a and a frame-shaped second side wall portion 7b, and is formed in a thin rectangular box shape that is open at the front (upper side in FIG. 3). This rear case 7 is formed to be sized to fit into the front case 4. In this case, as shown in FIG. 2, a square rear opening 7c is provided at the central portion of the rear surface portion 7a of the rear case 7, similar to the front case 4.

[0018] As shown in FIGS. 2 and 3, this rear opening 7c, similar to the front opening 4c of the front case 4, has a vertical length that is slightly longer or slightly shorter than half of the vertical length of the rear surface portion 7a, and a horizontal length that is slightly longer or slightly shorter than half of the horizontal length of the rear surface portion 7a. Thereby, the opening area of the rear opening 7c is similar to that of the front opening 4c of the front case 4, and is about 2 / 5 to 3 / 5 of the area of the entire rear surface portion 7a.

[0019] Also, as shown in FIG. 2, a plurality of rear reinforcing ribs 7d that cross the rear opening 7c in the vertical and horizontal directions are provided in a grid pattern on the rear surface portion 7a of the rear case 7, similar to the front case 4. Further, as shown in FIG. 7, the frame-shaped second side wall portion 7b in the rear case 7 is provided continuously along the four sides of the rear surface portion 7a. When the rear case 7 is fitted into the front case 4 as shown in FIG. 3, the outer surface of the second side wall portion 7b is in close contact with the inner surface of the first side wall portion 4b of the front case 4.

[0020] Furthermore, as shown in Figures 2 and 7, multiple semi-cylindrical second case mounting portions 7e are provided on the outer surface of this frame-shaped second side wall portion 7b. These semi-cylindrical second case mounting portions 7e are inserted into and fitted into the semi-cylindrical first case mounting portion 4e of the front case 4 when the rear case 7 is fitted into the front case 4. In the center of these second case mounting portions 7e, a screw hole 7g into which the screw member 7f shown in Figure 1 is screwed is provided along the front-to-back direction (the thickness direction of the rear case 7).

[0021] As shown in Figures 1, 2, and 7, when the semi-cylindrical second case mounting portion 7e of the rear case 7 is inserted into the semi-cylindrical first case mounting portion 4e of the front case 4, and the screw member 7f is screwed into the screw hole 7g of the second case mounting portion 7e from the front part 4a side of the front case 4 and tightened, the head of the screw member 7f presses the semi-cylindrical first case mounting portion 4e against the semi-cylindrical second case mounting portion 7e, as shown in Figure 1. In this way, the front case 4 and the rear case 7 are attached by multiple screw members 7f.

[0022] Furthermore, as shown in Figures 7 and 8, the rear yoke 8 and the rear magnet plate 9, which are magnetic plates, are mounted overlapping inside the rear case 7. In this case, a recess 7h is provided inside the rear case 7 in which the rear yoke 8 and the rear magnet plate 9 are arranged overlapping. Around this recess 7h, a raised mounting base 7j is provided, which is higher than the rear magnet plate 9, to which the diaphragm 10, described later, is attached.

[0023] As shown in Figures 2, 3, and 8, the rear yoke 8, like the front yoke 5, is a material through which magnetic fields can easily pass, and is formed from a magnetic material such as stainless steel in a thin, flat shape with an area slightly larger than the rear opening 7c. Multiple second screw mounting portions 8a are provided on both sides of the rear yoke 8, at the upper and lower parts and in the intermediate part of the lower part.

[0024] As a result, as shown in Figure 7, the rear yoke 8 is attached to the rear surface portion 7a shown in Figure 2 by multiple second screw mounting portions 8a within the recess 7h of the rear case 7 using multiple second screws 8b. In addition, as shown in Figure 8, the rear yoke 8 is provided with a number of third ventilation holes 8c arranged vertically and horizontally, similar to the front yoke 5.

[0025] As shown in Figures 5(b) and 7, the rear magnet plate 9, like the front magnet plate 6, is formed in the shape of a rectangular flat plate approximately the same size as the rear yoke 8, and is screwed in place while overlapping the rear yoke 8. Similar to the rear yoke 8, the rear magnet plate 9 is provided with numerous fourth ventilation holes 9a. Furthermore, as shown in Figure 6, similar to the front magnet plate 6, the rear magnet plate 9 is magnetized with numerous N and S poles arranged vertically in accordance with the wiring pattern 20 of the diaphragm 10, which will be described later.

[0026] Incidentally, as shown in Figures 3 and 9, the diaphragm 10 is mounted on the mounting base 7j inside the rear case 7, covering the rear magnet plate 9 without contacting it. As shown in Figure 10, the diaphragm 10 comprises a movable part 11, first fixed parts 12 to third fixed parts 14, and first elastically deformable parts 15 to third elastically deformable parts 17, which are integrally formed from a polyethylene-based reinforced plastic film.

[0027] In this case, as shown in Figure 9, the movable part 11 is formed in a rectangular shape with a larger area than the rear yoke 8 and the rear magnet plate 9, and the entire surface is displaced vertically (in the direction of arrow X in Figure 9) relative to the entire surface. The first fixing parts 12 to the third fixing parts 14 are arranged on the mounting base part 7j of the rear case 7, corresponding to the four sides of the movable part 11. For example, the first fixing part 12 is arranged on both sides of the upper edge of the movable part 11, excluding the middle part. The second fixing part 13 is arranged on both sides of the lower edge of the movable part 11, excluding the middle part. The third fixing part 14 is arranged on each of the left and right sides of the movable part 11, corresponding to approximately the same length as the others.

[0028] As shown in Figures 9 and 10, the first elastic deformation sections 15 to the third elastic deformation sections 17 elastically deformably connect the first fixed sections 12 to the third fixed sections 14 and the movable section 11, respectively. For example, the first elastic deformation section 15 is elastically deformable between the upper edge of the movable section 11 and the corresponding first fixed section 12. The second elastic deformation section 16 is elastically deformable between the lower edge of the movable section 11 and the corresponding second fixed section 13. The third elastic deformation section 17 is elastically deformable between each of the left and right side edges of the movable section 11 and the corresponding left and right third fixed sections 14.

[0029] As shown in Figures 9 and 10, these first elastic deformation parts 15 to third elastic deformation parts 17 are formed to displace the movable part 11 in the vertical direction (arrow X direction in Figure 10) while being parallel to the first fixed parts 12 to third fixed parts 14. In other words, these first elastic deformation parts 15 to third elastic deformation parts 17 have sufficient rigidity so that the movable part 11 does not deform under its weight when it is not in operation. That is, these first elastic deformation parts 15 to third elastic deformation parts 17 are set to have a width, length, and shape such that the movable part 11 does not bend under its weight when it is not in operation.

[0030] Furthermore, as shown in Figures 9 and 10, these first elastic deformation sections 15 to the third elastic deformation section 17 have a lower rigidity than the rigidity of the movable section 11 when the movable section 11 is in operation. In other words, these first elastic deformation sections 15 to the third elastic deformation section 17 are set to have a width, length, and shape such that when the movable section 11 is in operation, the movable section 11 does not deform, and only the first elastic deformation sections 15 to the third elastic deformation section 17 flex and deform.

[0031] In this case, as shown in Figures 9 and 10, the shapes of the first elastic deformation parts 15 and the second elastic deformation parts 16, which face each other in one direction, the vertical direction, and the multiple third elastic deformation parts 17, which face each other in the other direction, the left and right direction, are different. Specifically, the first elastic deformation part 15 and the second elastic deformation part 16 are each formed in a roughly S-shape, and the multiple third elastic deformation parts 17 are each formed in a roughly Y-shape.

[0032] Specifically, as shown in Figure 10, the first elastic deformation portion 15 is formed in a substantially S-shape between both sides of the upper edge of the movable portion 11 and the corresponding first fixed portions 12 on both sides. For example, the first elastic deformation portion 15 on the right side of the upper edge of the movable portion 11 includes a first lower right projection 15a extending from the right side of the upper edge of the movable portion 11 toward the right first fixed portion 12, a first upper right projection 15b extending from the left side of the right first fixed portion 12 toward the upper edge of the movable portion 11, and a narrow first right deformation portion 15c provided from the first lower right projection 15a to the first upper right projection 15b.

[0033] In this case, as shown in Figure 10, a first lower right slit 15d is provided between the first right deformable portion 15c and the upper edge of the movable portion 11. Also, a first upper right slit 15e is provided between the first right deformable portion 15c and the right first fixed portion 12. As a result, the first right deformable portion 15c of the right first elastic deformable portion 15 flexes and deforms vertically (in the direction of arrow X in Figure 10) with respect to the planes of the movable portion 11 and the first fixed portion 12, using the first upper right projection 15b of the right first fixed portion 12 as a fulcrum.

[0034] Similarly, the left first elastic deformation portion 15 on the upper side of the movable portion 11 includes, as shown in Figure 10, a first lower left projection 15f extending from the left side of the upper side of the movable portion 11 toward the left first fixed portion 12, a first upper left projection 15g extending from the right side of the left first fixed portion 12 toward the upper side of the movable portion 11, and a narrow first left deformation portion 15h provided from the first lower left projection 15f to the first upper left projection 15g.

[0035] In this case, a first lower left slit 15j is provided between the first left deformable portion 15h and the upper edge of the movable portion 11, as shown in Figure 10. Furthermore, a first upper left slit 15k is provided between the first left deformable portion 15h and the left first fixed portion 12. As a result, the first left deformable portion 15h of the left first elastic deformable portion 15 flexes and deforms vertically (in the direction of arrow X in Figure 10) relative to the planes of the movable portion 11 and the first fixed portion 12, using the first upper left projection 15g of the left first fixed portion 12 as a fulcrum.

[0036] Furthermore, as shown in Figure 10, the second elastic deformation portion 16 is formed in a substantially S-shape between both sides of the lower edge of the movable portion 11 and the corresponding second fixed portions 13 on both sides. For example, the second elastic deformation portion 16 on the right side of the lower edge of the movable portion 11 includes a second upper right projection 16a extending from the right side of the lower edge of the movable portion 11 toward the right second fixed portion 13, a second lower right projection 16b extending from the left side of the right second fixed portion 13 toward the lower edge of the movable portion 11, and a narrow second right deformation portion 16c provided from the second upper right projection 16a to the second lower right projection 16b.

[0037] In this case, a second lower right slit 16d is provided between the second right deformable portion 16c and the lower edge of the movable portion 11, as shown in Figure 10. Furthermore, a second upper right slit 16e is provided between the second right deformable portion 16b and the right-side second fixed portion 13. As a result, the second right deformable portion 16c of the right-side second elastic deformable portion 16 flexes and deforms vertically (in the direction of arrow X in Figure 10) relative to the planes of the movable portion 11 and the second fixed portion 13, using the second lower right projection 16b of the right-side second fixed portion 13 as a fulcrum.

[0038] Similarly, the second elastic deformation portion 16 on the left side of the lower edge of the movable portion 11 includes, as shown in Figure 10, a second upper left projection 16f extending from the left side of the lower edge of the movable portion 11 toward the left second fixed portion 13, a second lower left projection 16g extending from the right side of the left second fixed portion 13 toward the lower edge of the movable portion 11, and a narrow second left deformation portion 16h provided from the second upper left projection 16f to the second lower left projection 16g.

[0039] In this case, a second lower left slit 16j is provided between the second left deformable portion 16h and the lower edge of the movable portion 11, as shown in Figure 10. Furthermore, a second upper left slit 16k is provided between the second left deformable portion 16b and the left-side second fixed portion 13. As a result, the second left deformable portion 16h of the left-side second elastic deformable portion 16 flexes and deforms in the vertical direction (arrow X direction in Figure 10) relative to the planes of the movable portion 11 and the second fixed portion 13, using the second lower left projection 16g of the left-side second fixed portion 13 as a fulcrum.

[0040] On the other hand, as shown in Figure 10, the third elastic deformation portions 17 on both the left and right sides are formed in a substantially Y shape between each side of the movable portion 11 and the corresponding third fixed portions 14 on both the left and right sides. Specifically, the third elastic deformation portion 17 located on the right side has a third upper right deformation portion 17a and a third lower right deformation portion 17b between the right side of the movable portion 11 and the corresponding third fixed portion 14 on the right side. Similarly, the third elastic deformation portion 17 located on the left side has a third upper left deformation portion 17c and a third lower left deformation portion 17d between the left side of the movable portion 11 and the corresponding third fixed portion 14 on the left side.

[0041] For example, the third upper right deformation portion 17a of the third elastic deformation portion 17 located to the right of the movable portion 11 is provided along the right side of the movable portion 11 between a third upper projection 17e that protrudes from the upper part of the middle portion on the right side of the movable portion 11 toward the right third fixing portion 14 and a third right fixing projection 17f that protrudes from the middle portion of the right third fixing portion 14 corresponding to the right side of the movable portion 11 toward the right side of the movable portion 11.

[0042] Similarly, the third lower right deformation portion 17b of the third elastic deformation portion 17 located to the right of the movable portion 11 is provided with a narrow width along the right side of the movable portion 11, as shown in Figure 10, between the third lower projection 17g that protrudes from the lower side of the middle portion on the right side of the movable portion 11 toward the right third fixing portion 14, and the third right fixing projection 17f that protrudes from the middle portion of the right third fixing portion 14 corresponding to the right side of the movable portion 11 toward the right side of the movable portion 11.

[0043] In this case, as shown in Figure 10, a third upper right slit 17h is provided between the third upper right deformation portion 17a of the third elastic deformation portion 17 and the third fixing portion 14, along the right side of the third fixing portion 14. Also, a third lower right slit 17j is provided with a narrow width between the third lower right deformation portion 17b of the third elastic deformation portion 17 and the third fixing portion 14, along the right side of the third fixing portion 14.

[0044] Furthermore, as shown in Figure 10, a third right slit 17k is provided between the third upper right deformation portion 17a, the third lower right deformation portion 17b, and the third right fixing projection 17f of the third elastic deformation portion 17, and the corresponding right side of the movable portion 11, along the right side of the right movable portion 11. As a result, the third upper right deformation portion 17a and the third lower right deformation portion 17b of the right third elastic deformation portion 17 are each formed to be narrow and elongated, and they deform by bending in the vertical direction (arrow X direction in Figure 10) relative to the planes of the movable portion 11 and the third fixed portion 14, with the third right fixing projection 17f of the right third fixed portion 14 as the fulcrum.

[0045] Furthermore, the third upper left deformation portion 17c of the third elastic deformation portion 17 located to the left of the movable portion 11 is provided with a narrow width along the left side of the movable portion 11, as shown in Figure 10, between the third upper projection 17m that protrudes from the upper part of the middle portion on the left side of the movable portion 11 toward the left third fixing portion 14, and the third left fixing projection 17n that protrudes from the middle portion of the left third fixing portion 14 corresponding to the left side of the movable portion 11 toward the left side of the movable portion 11.

[0046] Similarly, the third lower left deformation portion 17d of the third elastic deformation portion 17 located to the left of the movable portion 11 is provided with a narrow width along the left side of the movable portion 11, as shown in Figure 10, between the third lower projection 17p that protrudes from the lower part of the middle portion on the left side of the movable portion 11 toward the left third fixing portion 14, and the third left fixing projection 17n that protrudes from the middle portion of the left third fixing portion 14 corresponding to the left side of the movable portion 11 toward the left side of the movable portion 11.

[0047] In this case, as shown in Figure 10, a third upper left slit 17q is provided between the third upper left deformation portion 17c of the third elastic deformation portion 17 and the third fixing portion 14, along the left side of the third fixing portion 14. Also, a third lower left slit 17r is provided between the third lower left deformation portion 17d of the third elastic deformation portion 17 and the third fixing portion 14, along the left side of the third fixing portion 14.

[0048] Furthermore, as shown in Figure 10, a third left slit 17s is provided between the third upper left deformation portion 17c, the third lower left deformation portion 17d, and the third left fixing projection 17n of the third elastic deformation portion 17, and the corresponding right side of the movable portion 11, along the left side of the left movable portion 11. As a result, the third upper left deformation portion 17c and the third lower left deformation portion 17d of the left third elastic deformation portion 17 are formed to be narrow and elongated, and they deform by bending in the vertical direction (arrow X direction in Figure 10) relative to the planes of the movable portion 11 and the third fixed portion 14, with the third left fixing projection 17n of the left third fixed portion 14 as the fulcrum.

[0049] On the other hand, as shown in Figure 9, a connecting portion 18 extends from the middle of the upper edge of the movable portion 11 through the space between the left and right first fixing portions 12 toward the second side wall portion 7b on the upper side of the rear case 7. That is, as shown in Figure 10, this connecting portion 18 is provided projecting from the middle of the upper edge of the movable portion 11 through the space between the left and right first fixing portions 12 toward the upper side of the first fixing portions 12.

[0050] As shown in Figure 10, the connecting portion 18 has a tip that protrudes from the upper side of the first fixing portion 12, and a connecting mounting portion 18a is provided on the left and right sides outside the first fixing portion 12 on both sides, extending along the upper side of the movable portion 11. These connecting mounting portions 18a are positioned on the mounting base portion 7j inside the rear case 7, as shown in Figures 3 and 9. In addition, as shown in Figures 9 and 10, a protruding portion 19 is provided in the middle of the lower side of the movable portion 11, protruding between the second fixing portions 13 on both the left and right sides.

[0051] Incidentally, as shown in Figure 10, the movable part 11 is provided with a wiring pattern 20. This wiring pattern 20 is made of a conductive and lightweight metal such as aluminum. This wiring pattern 20 is formed in a zigzag pattern on the front and back surfaces of the movable part 11.

[0052] Specifically, as shown in Figure 10, the wiring pattern 20 consists of numerous wires 20a arranged in a continuous vertical direction along each side of the movable part 11, parallel to the upper and lower edges of the movable part 11. As a result, the front magnet plate 6 and the rear magnet plate 9 are magnetized with their N and S poles arranged in a continuous vertical direction corresponding to the arrangement direction of the wiring pattern 20, as shown in Figure 6.

[0053] In this case, as shown in Figure 10, the wiring pattern 20 has one end 20b of the wiring 20a provided on the surface of the movable part 11 provided on the surface of the upper side connection part 18, and the other end 20c provided on the lower side projection part 19. Furthermore, in this wiring pattern 20, the other end 20c of the wiring 20a provided on the lower side projection part 19 is guided to the back surface of the projection part 19 by a first through hole 20d, and the wiring 20a guided to this back surface is arranged in a zigzag pattern on the back surface of the movable part 11 in the same arrangement direction as on the surface. In addition, in this wiring pattern 20, the end 20e of the wiring 20a arranged on the back surface is guided to the back surface of the connection part 18 and provided on the surface of the connection part 18 alongside the one end 20b by a second through hole 20f.

[0054] As a result, as shown in Figure 10, the current flowing through the wiring pattern 20a alternates between one direction, from one end 20b on the front side towards the second through-hole 20f at the back end 20e, and the reverse direction, from the second through-hole 20f at the back end 20e towards the one end 20b on the front side. In this case, as shown in Figures 3, 9, and 10, the wiring pattern 20 is electrically connected to the wiring board 21 at the connection portion 18.

[0055] Specifically, as shown in Figures 3, 9, and 10, the wiring board 21 is positioned on the connection mounting portion 18a of the connection portion 18 and attached to the mounting base portion 7j inside the rear case 7 by a third screw 21a. The wiring board 21 is also provided with a connector portion 21b that is electrically connected to an external device by a connection cable (not shown).

[0056] Furthermore, as shown in Figure 3, when the rear case 7 is fitted and installed inside the front case 4, the diaphragm 10 is positioned with a predetermined gap S between the front magnet plate 6 installed inside the front case 4 and the rear magnet plate 9 installed inside the rear case 7. That is, with the diaphragm 10 positioned between the front magnet plate 6 installed inside the front case 4 and the rear magnet plate 9 installed inside the rear case 7, the movable part 11 is displaced so as to move closer to or further away from the front magnet plate 6 and the rear magnet plate 9, as shown in Figures 11(a) and 11(b).

[0057] In this case, the first fixing part 12 of the diaphragm 10 is attached to the mounting base 7j on the upper side of the rear case 7 together with the wiring board 21 by a third screw 21a, as shown in Figures 7 and 9. The second fixing part 13 is attached to the mounting base 7j on the lower side of the rear case 7 by a third screw 21a. The third fixing part 14 is attached to the mounting bases 7j on both the left and right sides of the rear case 7 by a third screw 21a. As a result, the movable part 11 of the diaphragm 10 is displaced perpendicular to its surface (in the direction of arrow X in Figure 9) by the deflection deformation of the first elastic deformation part 15 to the third elastic deformation part 17.

[0058] Furthermore, as shown in Figure 3, when the rear case 7 is fitted into the front case 4, the diaphragm 10 is held in place by the first to third fixing parts 12 to 14, which are arranged around the front magnet plate 6 inside the front case 4, as shown in Figure 4. These first to third cushions 22 to 24 are made of foam material, but may also be made of an elastic material such as rubber. Each of these first to third cushions 22 to 24 is formed so that its height (bottom surface in Figure 3) is higher than the height (bottom surface in Figure 3) of the front magnet plate 6.

[0059] As shown in Figures 3, 4, and 9, the first cushion 22 presses down on the first fixing parts 12 on both the left and right sides of the upper edge of the diaphragm 10 when the front case 4 and the rear case 7 are attached. The second cushion 23 presses down on the second fixing parts 13 on both the left and right sides of the lower edge of the diaphragm 10 when the front case 4 and the rear case 7 are attached. As shown in Figures 4 and 9, the third cushion 24 presses down on the third fixing parts 14 on both the left and right sides of each side of the diaphragm 10 when the front case 4 and the rear case 7 are attached.

[0060] In this case, the connecting portion 18 located on the upper side of the diaphragm 10 is positioned to correspond to the connecting support portion 5d of the front yoke 5 mounted inside the front case 4, as shown in Figures 3, 4, and 9. The protruding portion 19 located on the lower side of the diaphragm 10 is pressed down by the second cushion 23. As a result, the diaphragm 10 is mounted between the front case 4 and the rear case 7 with the movable portion 11 positioned between the front magnet plate 6 and the rear magnet plate 9 at a predetermined distance S, as shown in Figure 3.

[0061] Furthermore, as shown in Figures 3 and 4, when the front case 4 and rear case 7 are attached with the diaphragm 10 in between, the front magnet plate 6 and the rear magnet plate 9 generate a magnetic field between them. Therefore, when current flows through the wiring pattern 20 formed on the movable part 11 of the diaphragm 10, the movable part 11 is attracted by magnetic force to one of the front magnet plate 6 or the rear magnet plate 9, depending on the direction of the current flow.

[0062] In other words, as shown in Figure 10, when a unidirectional current flows through the wiring 20a of the wiring pattern 20 from one end 20b on the front side to the second through-hole 20f at the end 20e on the back side, the movable part 11 is attracted to the front magnet plate 6 by magnetic force (magnetic force in the Y1 direction), as shown in Figure 11(a). Also, when a reverse current flows through the wiring 20a of the wiring pattern 20 from the second through-hole 20f at the end 20e on the back side to the one end 20b on the front side, the movable part 11 is attracted to the rear magnet plate 9 by magnetic force (magnetic force in the Y2 direction), as shown in Figure 11(b).

[0063] Next, we will explain how to assemble speaker 1 as described above. In this case, the front yoke 5 is first installed inside the front case 4 as shown in Figure 4. At this time, the front magnet plate 6 is attached to the front yoke 5 with screws while it is superimposed on it. With the front yoke 5, to which the front magnet plate 6 is attached, aligned with the front opening 4c of the front part 4a of the front case 4, the first screw mounting part 5a of the front yoke 5 is attached to the inner surface of the front case 4 from the front side of the front part 4a shown in Figure 1 using the first screw 5b.

[0064] In this state, as shown in Figure 4, the tip of the connecting support portion 5d provided on the upper edge of the front yoke 5 approaches the inner surface of the first side wall portion 4b located on the upper side of the front case 4, and the connecting support portion 5d is positioned on the upper side inside the front case 4. At this time, the first cushion 22 to the third cushion 24 are attached inside the front case 4 located on the outer circumference of the front yoke 5 so as to protrude beyond the front magnet plate 6.

[0065] On the other hand, as shown in Figure 7, the rear yoke 8 is installed inside the rear case 7. At this time, the rear magnet plate 9 is also attached to the rear yoke 8 by screwing it in with the plate overlapping it. The rear yoke 8 with the rear magnet plate 9 attached is then placed in the recess 7h inside the rear case 7, corresponding to the rear opening 7c of the rear surface portion 7a of the rear case 7. In this state, the second screw mounting portion 8a of the rear yoke 8 is attached to the recess 7h of the rear case 7 from the rear side of the rear surface portion 7a shown in Figure 2 using the second screw 8b.

[0066] In this state, the diaphragm 10 is installed inside the rear case 7 as shown in Figure 9. At this time, the first fixing part 12 to the third fixing part 14 of the diaphragm 10 are attached to the mounting base part 7j inside the rear case 7. That is, the first fixing part 12 on the upper side is attached to the mounting base part 7j on the upper side with the third screw 21a. Also, the second fixing part 13 on the lower side is attached to the mounting base part 7j on the lower side with the third screw 21a. Furthermore, the third fixing parts 14 on both the left and right sides are attached to the mounting base parts 7j on both the left and right sides with the third screw 21a.

[0067] As a result, the diaphragm 10 is mounted inside the rear case 7. In this state, the movable part 11 of the diaphragm 10 does not come into contact with the rear magnet plate 9, but is positioned with a predetermined distance S from the rear magnet plate 9. At this time, the movable part 11 is displaced parallel to the rear magnet plate 9 in a vertical direction (direction of arrow X in Figure 9) relative to its entire surface by the elastic deformation of the first elastic deformation part 15 to the third elastic deformation part 17.

[0068] Next, the rear case 7, to which the diaphragm 10 is attached, is fitted into the front case 4. At this time, the semi-cylindrical second case mounting portion 7e of the rear case 7 is inserted into the semi-cylindrical first case mounting portion 4e of the front case 4. In this state, the screw member 7f is screwed into the screw hole 7g of the second case mounting portion 7e from the front portion 4a side of the front case 4 and tightened. As a result, the head of the screw member 7f presses the semi-cylindrical first case mounting portion 4e against the semi-cylindrical second case mounting portion 7e. Thus, the front case 4 and the rear case 7 are attached by multiple screw members 7f.

[0069] In this state, the diaphragm 10 is positioned between the front magnet plate 6 and the rear magnet plate 9 with a predetermined gap S. Specifically, a gap S is provided between the front magnet plate 6 and the movable part 11 of the diaphragm 10 by the first cushions 22 to the third cushions 24, and a gap S is provided between the rear magnet plate 9 and the movable part 11 of the diaphragm 10 by the mounting base 7j. In this state, a magnetic field is generated between the front magnet plate 6 and the rear magnet plate 9. Therefore, when current flows alternately in one direction and in the reverse direction through the wiring pattern 20 of the movable part 11 of the diaphragm 10, the movable part 11 vibrates.

[0070] Next, we will explain the operation of speaker 1. In this speaker 1, a magnetic field is generated between the front magnet plate 6 and the rear magnet plate 9. When current flows through the wiring pattern 20 provided on the movable part 11 of the diaphragm 10, the movable part 11 is attracted by magnetic force to one of the front magnet plate 6 or the rear magnet plate 9, as shown in Figures 11(a) and 11(b).

[0071] For example, when a unidirectional current flows through the wiring 20a of the wiring pattern 20 from one end 20b on the front side to the second through-hole 20f at the end 20e on the back side, the movable part 11 is attracted by the magnetic force (magnetic force in the direction of arrow Y1) due to the magnetic field between the front magnet plate 6 and the rear magnet plate 9, as shown in Figure 11(a). Also, when a reverse current flows through the wiring 20a of the wiring pattern 20 from the second through-hole 20f at the end 20e on the back side to the one end 20b on the front side, the movable part 11 is attracted by the magnetic force (magnetic force in the direction of arrow Y2) due to the magnetic field between the front magnet plate 6 and the rear magnet plate 9, as shown in Figure 11(b).

[0072] Therefore, when current flows alternately in one direction and in the opposite direction through the wiring 20a of the wiring pattern 20, the movable part 11 vibrates so as to alternately approach the front magnet plate 6 and the rear magnet plate 9. When the movable part 11 vibrates in this way, the first elastic deformation part 15 to the third elastic deformation part 17 each undergo elastic deformation simultaneously. For example, when a current flows in one direction through the wiring 20a of the wiring pattern 20 and the movable part 11 is attracted to the front magnet plate 6 in the direction of arrow Y1 shown in Figure 11(a), the first elastic deformation part 15 to the third elastic deformation part 17 each undergo simultaneous bending deformation toward the front magnet plate 6.

[0073] In other words, the first elastic deformation part 15 on the right side, the first right deformation part 15c, flexes toward the front magnet plate 6 with the first upper right projection 15b as a fulcrum, displacing the movable part 11 toward the front magnet plate 6. At the same time, the first left deformation part 15h of the first elastic deformation part 15 on the left side, flexes toward the front magnet plate 6 with the first upper left projection 15g as a fulcrum, displacing the movable part 11 toward the front magnet plate 6.

[0074] Simultaneously, the second right deformation portion 16c of the second elastic deformation portion 16 on the right side flexes and deforms toward the front magnet plate 6 with the second lower right projection 16b as a fulcrum, displacing the movable portion 11 toward the front magnet plate 6. At the same time, the second left deformation portion 16h of the second elastic deformation portion 16 on the left side flexes and deforms toward the front magnet plate 6 with the second lower left projection 16g as a fulcrum, displacing the movable portion 11 toward the front magnet plate 6.

[0075] Furthermore, the third upper right deformation section 17a and the third lower right deformation section 17b of the right-side third elastic deformation section 17 each deform towards the front magnet plate 6 with the third right fixing projection 17f as a fulcrum, displacing the movable section 11 toward the front magnet plate 6. At the same time, the third upper left deformation section 17c and the third lower left deformation section 17d of the left-side third elastic deformation section 17 each deform towards the front magnet plate 6 with the third left fixing projection 17n as a fulcrum, displacing the movable section 11 toward the front magnet plate 6.

[0076] When the first elastic deformation section 15 to the third elastic deformation section 17 are elastically deformed simultaneously toward the front magnet plate 6, the movable section 11 displaces uniformly parallel to the front magnet plate 6 and approaches the front magnet plate 6. At this time, the air pushed by the movable section 11 is discharged to the outside through the front opening 4c of the front case 4 via the numerous second ventilation holes 6a of the front magnet plate 6 and the numerous first ventilation holes 5c of the front yoke 5.

[0077] Furthermore, at this time, the displacement of the movable part 11 draws outside air into the rear case 7 through the rear opening 7c, and this drawn-in air is sent to the back side of the movable part 11 through the numerous third ventilation holes 8c of the rear yoke 8 and the numerous fourth ventilation holes 9a of the rear magnet plate 9. As a result, the movable part 11 is able to displace smoothly toward the front magnet plate 6 without being affected by the air inside the front case 4 and the air inside the rear case 7.

[0078] On the other hand, when a reverse current flows through the wiring 20a of the wiring pattern 20 from the second through-hole 20f at the back end 20e toward one end 20b on the front side, and the movable part 11 is pulled toward the rear magnet plate 9 in the direction of arrow Y2 shown in Figure 11(b), the first elastic deformation part 15 to the third elastic deformation part 17 each simultaneously deform and bend toward the rear magnet plate 9, displacing the movable part 11 toward the rear magnet plate 9.

[0079] In other words, the first elastic deformation part 15 on the right side, the first right deformation part 15c, flexes toward the rear magnet plate 9 with the first upper right projection 15b as a fulcrum, displacing the movable part 11 toward the rear magnet plate 9. At the same time, the first left deformation part 15h of the first elastic deformation part 15 on the left side, flexes toward the rear magnet plate 9 with the first upper left projection 15g as a fulcrum, displacing the movable part 11 toward the rear magnet plate 9.

[0080] Simultaneously, the second right deformation portion 16c of the right-side second elastic deformation portion 16 bends and deforms toward the rear magnet plate 9, using the second right lower projection 16b as a fulcrum, and displaces the movable portion 11 toward the rear magnet plate 9. At the same time, the second left deformation portion 16h of the left-side second elastic deformation portion 16 bends and deforms toward the rear magnet plate 9, using the second left lower projection 16g as a fulcrum, and displaces the movable portion 11 toward the rear magnet plate 9.

[0081] Furthermore, the third upper right deformation section 17a and the third lower right deformation section 17b of the right-side third elastic deformation section 17 each deform towards the rear magnet plate 9 with the third right fixing projection 17f as a fulcrum, displacing the movable section 11 toward the rear magnet plate 9. At the same time, the third upper left deformation section 17c and the third lower left deformation section 17d of the left-side third elastic deformation section 17 each deform towards the rear magnet plate 9 with the third left fixing projection 17n as a fulcrum, displacing the movable section 11 toward the rear magnet plate 9.

[0082] When the first elastic deformation section 15 to the third elastic deformation section 17 are simultaneously elastically deformed toward the rear magnet plate 9, the movable section 11 displaces uniformly parallel to the rear magnet plate 9 and approaches it. At this time, the air pushed by the movable section 11 is discharged to the outside through the rear opening 7c of the rear case 7 via the numerous fourth ventilation holes 9a of the rear magnet plate 9 and the numerous third ventilation holes 8c of the rear yoke 8.

[0083] Furthermore, at this time, the displacement of the movable part 11 draws outside air into the front case 4 through the front opening 4c, and this drawn-in air is sent to the front side of the movable part 11 through the numerous first ventilation holes 5c of the front yoke 5 and the numerous second ventilation holes 6a of the front magnet plate 6. As a result, the movable part 11 is able to displace smoothly toward the rear magnet plate 9 without being affected by the air inside the front case 4 or the air inside the rear case 7.

[0084] In this way, by passing current alternately in one direction and in the opposite direction through the wiring pattern 20 of the movable part 11, the first elastic deformation part 15 to the third elastic deformation part 17 can be elastically deformed without being affected by air resistance, allowing the movable part 11 to move in and out of the front magnet plate 6 and the rear magnet plate 9 in a parallel state. This reduces the load when the movable part 11 is displaced, and allows the entire movable part 11 to be displaced uniformly and in parallel. Therefore, in this speaker 1, the movable part 11 can be vibrated smoothly, making it possible to reproduce high-quality sound at a low cost.

[0085] Thus, the diaphragm 10 of this speaker 1 includes a movable part 11 whose entire surface can be displaced in the direction perpendicular to the entire surface (in the direction of arrow X shown in Figure 10), first fixed parts 12 to third fixed parts 14 arranged corresponding to the four sides of the movable part 11, and first elastic deformation parts 15 to third elastic deformation parts 17 that connect the movable part 11 and the first fixed parts 12 to third fixed parts 14, respectively, and is therefore capable of reproducing high-quality sound.

[0086] In other words, the diaphragm 10 of this speaker 1 can simultaneously elastically deform the first elastic deformation section 15 to the third elastic deformation section 17. As a result of the elastic deformation of these first elastic deformation sections 15 to the third elastic deformation section 17, the movable part 11 can be smoothly displaced vertically (in the direction of arrow X shown in Figure 10) relative to its entire surface. This reduces the load on the movable part 11 when it is displaced, and allows the entire movable part 11 to be displaced uniformly and parallel, thus enabling the reproduction of high-quality sound at a low cost.

[0087] In this case, the diaphragm 10 of speaker 1 is displaced by the first elastic deformation section 15 to the third elastic deformation section 17 in a state parallel to the first fixed section 12 to the third fixed section 14. As a result, the entire movable section 11 can be displaced uniformly and parallel by the elastic deformation of the first elastic deformation section 15 to the third elastic deformation section 17, thereby improving sound quality.

[0088] Furthermore, in the diaphragm 10 of this speaker 1, the first elastic deformation section 15 to the third elastic deformation section 17 have sufficient rigidity to not deform under the weight of the movable section 11 when the movable section 11 is not in operation, and have lower rigidity than the movable section 11 when the movable section 11 is in operation. As a result, the holding force of the movable section 11 by the first elastic deformation section 15 to the third elastic deformation section 17 can be reduced, thereby reducing the load when the movable section 11 is displaced and improving responsiveness. This allows only the first elastic deformation section 15 to the third elastic deformation section 17 to be reliably and effectively elastically deformed when the movable section 11 is in operation.

[0089] In other words, in the diaphragm 10 of speaker 1, the first elastic deformation section 15 to the third elastic deformation section 17 are set to have a width, length, and shape such that they do not flex under the weight of the movable section 11 when the movable section 11 is not in operation, and when the movable section 11 is in operation, the movable section 11 does not deform, and only the first elastic deformation section 15 to the third elastic deformation section 17 flex and deform. As a result, the holding force of the movable section 11 by the first elastic deformation section 15 to the third elastic deformation section 17 can be reduced, thereby reducing the load when the movable section 11 is displaced and improving responsiveness.

[0090] Furthermore, in the diaphragm 10 of this speaker 1, the first elastic deformation parts 15 and the second elastic deformation parts 16, which are arranged opposite each other in one direction, the vertical direction, and the multiple third elastic deformation parts 17, which are arranged opposite each other in the other direction, the horizontal direction, have different shapes. As a result, the first elastic deformation parts 15 to the third elastic deformation parts 17 can be appropriately selected and provided according to the shape of the movable part 11, thereby enabling the movable part 11 to be effectively displaced by the first elastic deformation parts 15 to the third elastic deformation parts 17, regardless of the shape of the movable part 11.

[0091] Furthermore, in the diaphragm 10 of this speaker 1, a wiring pattern 20 is provided on the movable part 11, allowing current to flow through the wiring pattern 20, and the movable part 11 can be reliably and effectively displaced in accordance with the flow of this current. In other words, by positioning the diaphragm 10 of this speaker 1 between the front magnet plate 6 and the rear magnet plate 9, when current flows through the wiring pattern 20, the movable part 11 can be effectively displaced by the magnetic force generated by the magnetic field between the front magnet plate 6 and the rear magnet plate 9 in accordance with the flow of the current.

[0092] Furthermore, in the diaphragm 10 of this speaker 1, a connecting portion 18 is provided extending toward the first fixed portion 12 side corresponding to the upper side of the movable portion 11, which is one of the four sides of the movable portion 11. This allows the wiring pattern 20 and external equipment to be electrically connected at the connecting portion 18, thereby ensuring that current flows reliably and smoothly through the wiring pattern 20.

[0093] Furthermore, in the diaphragm 10 of this speaker 1, a plurality of first elastic deformation portions 12 are provided on the upper side, which is one side of the movable portion 11 from which the connecting portion 18 extends, avoiding the connecting portion 18. This makes it possible to reliably and effectively provide a plurality of first elastic deformation portions 12 between the upper side of the movable portion 11 and the plurality of first fixed portions 12.

[0094] In other words, in this diaphragm 10, a connecting portion 18 is provided in the middle of the upper edge of the movable portion 11, and a plurality of first elastic deformation portions 12 are provided on both the left and right sides of this connecting portion 18. As a result, even when the diaphragm 10 is electrically connected to an external device by the connecting portion 18, the movable portion 11 can be uniformly held by these plurality of first elastic deformation portions 12. This allows the movable portion 11 to be uniformly displaced by the plurality of first elastic deformation portions 12 without being affected by the connecting portion 18.

[0095] Furthermore, with this speaker 1, by having the diaphragm 10 described above, the diaphragm 10 can be vibrated well, and high-quality sound can be reproduced. In this case, with this speaker 1, the diaphragm 10 is displaceably positioned between a pair of magnetic plates, the front magnetic plate 6 and the rear magnetic plate 9, so that a magnetic field can be generated between the front magnetic plate 6 and the rear magnetic plate 9. As a result, when current is passed through the wiring pattern 20 provided on the movable part 11 of the diaphragm 10, the magnetic field generated between the front magnetic plate 6 and the rear magnetic plate 9 can cause the movable part 11 to vibrate well.

[0096] Furthermore, in this speaker 1, the first to third fixing parts 12 to 14, which are multiple fixing parts of the diaphragm 10, are sandwiched and fixed between a pair of cases, the front case 4 and the rear case 7. This ensures that the first to third fixing parts 12 to 14 are securely fixed between the front case 4 and the rear case 7, thereby allowing the diaphragm 10 to be fixed securely between the front case 4 and the rear case 7 in a stable state.

[0097] In this case, in speaker 1, the first fixing portion 12 to the third fixing portion 14 of the diaphragm 10 are sandwiched and fixed between the front case 4 and the rear case 7 via the first cushion 22 to the third cushion 24. This allows the first fixing portion 12 to the third fixing portion 14 to be stably sandwiched between the front case 4 and the rear case 7 by the first cushion 22 to the third cushion 24.

[0098] Furthermore, in this speaker 1, multiple magnetic poles are arranged and magnetized on a pair of magnetic plates, the front magnetic plate 6 and the rear magnetic plate 9, corresponding to the arrangement direction of the wiring pattern 20 provided on the movable part 11 of the diaphragm 10. This allows for the generation of a good magnetic field between the front magnetic plate 6 and the rear magnetic plate 9. As a result, when current is passed through the wiring pattern 20 provided on the movable part 11 of the diaphragm 10, the magnetic field generated between the front magnetic plate 6 and the rear magnetic plate 9 can reliably and effectively vibrate the movable part 11 in accordance with the flow of current.

[0099] Furthermore, in this speaker 1, a number of ventilation holes, namely the second ventilation holes 6a and the fourth ventilation holes 9a, are provided in each of the pair of magnet plates, namely the front magnet plate 6 and the rear magnet plate 9. As a result, when the movable part 11 of the diaphragm 10 vibrates, air can be ventilated through the second ventilation holes 6a and the fourth ventilation holes 9a in accordance with the vibration, allowing the movable part 11 to vibrate smoothly without being affected by the air.

[0100] In the above-described embodiment, the case in which the diaphragm 10 is mounted inside the rear case 7 was mentioned. However, the invention is not limited to this, and for example, as shown in the first modified example in Figure 12, the diaphragm 10 may be mounted on a frame 25 and incorporated inside the front case 4 and the rear case 7. In this case, the frame 25 only needs to be formed in substantially the same shape as the mounting base portion 7j provided inside the rear case 7.

[0101] In this first modified example, as shown in Figure 12, the diaphragm 10 can be attached to the frame 25 to create a unit, which improves the ease of assembly when incorporating the diaphragm 10 into the front case 4 and rear case 7, thereby suppressing variations in performance due to assembly.

[0102] Furthermore, in this first modified example, as shown in Figure 12, the first elastic deformation portion 15 to the third elastic deformation portion 17 of the diaphragm 10 have a fine shape, and it is necessary to prevent deformation of the shape during assembly. Therefore, before forming the first elastic deformation portion 15 to the third elastic deformation portion 17, the diaphragm 10 is attached to the frame 25, and in this state, the first elastic deformation portion 15 to the third elastic deformation portion 17 is formed by, for example, laser processing. This improves both productivity and quality.

[0103] Furthermore, although the above-described embodiment described a case in which the first elastic deformation portion 15 to the third elastic deformation portion 17 are formed in a substantially S-shape or substantially Y-shape, the present invention is not limited to this, and may be formed in a substantially O-shape, for example, as shown in the second modified example in Figure 13. That is, the fourth elastic deformation portion 30 of this second embodiment comprises a first connecting portion 30a provided on one side of the movable portion 11 of the diaphragm 10, a second connecting portion 30b provided on the fourth fixed portion 31 of the diaphragm 10, and a substantially O-shaped fourth deformation portion 30c provided between the first connecting portion 30a and the second connecting portion 30b.

[0104] In this case, as shown in Figure 13, a first slit 32 is provided on both sides of the first connecting portion 30a between one side of the movable portion 11 and the fourth deformable portion 30c. Also, a second slit 33 is provided on both sides of the second connecting portion 30b between the fourth fixed portion 31 and the fourth deformable portion 30c. Furthermore, a third slit 34 is provided in the middle of the fourth deformable portion 30c parallel to one side of the movable portion 11. As a result, the fourth elastic deformable portion 30 deforms by bending vertically relative to the planes of the movable portion 11 and the fourth fixed portion 31, with the fourth deformable portion 30c pivoting on the second connecting portion 30b of the fourth fixed portion 31.

[0105] Furthermore, in this invention, the shape, position, and number of the multiple elastically deformable parts, as well as the holding mechanism, are not limited to the embodiments and second modifications described above, but can be freely set.

[0106] Furthermore, in the above-described embodiment, the wiring pattern 20 provided on the movable part 11 of the diaphragm 10 was described in which a large number of wires 20a provided along the horizontal direction parallel to the upper and lower edges of the movable part 11 were arranged in a continuous vertical direction along each side edge on both the left and right sides of the movable part 11. However, the present invention is not limited to this, and the wiring pattern may be formed as in the third modified example described below.

[0107] In other words, the wiring pattern of this third modified example may be arranged such that, for example, a large number of wires are continuously arranged in the horizontal direction along the upper and lower edges of the movable part 11, with the wires provided along the vertical direction parallel to the sides of the movable part 11, or a large number of wires are continuously arranged in the direction perpendicular to the diagonals of the movable part 11. In this case as well, the front magnet plate 6 and the rear magnet plate 9 only need to be magnetized with the N pole and S pole arranged according to the arrangement direction of the wiring pattern of the movable part 11.

[0108] Furthermore, although the above-described embodiment described a case in which the wiring pattern 20 provided on the movable part 11 is formed by a single wire 20a, the present invention is not limited to this, and may be formed by, for example, two or more wires arranged in parallel. [Explanation of Symbols]

[0109] 1 speaker 2 Front Unit 3 Rear Unit 4. Front case 4a Front part 4b First side wall part 4c Front opening 5. Front yoke 5c First ventilation hole 6 Front magnet plate 6a Second ventilation hole 7 Rear case 7a Rear part 7b Second side wall part 7c Rear opening 8. Rear yoke 8c Third ventilation hole 9 Rear magnet plate 9a Fourth vent 10 diaphragm 11 Moving parts 12~14 1st fixed part ~ 3rd fixed part 15-17 First elastic deformation section to third elastic deformation section 18 Connection part 19 Protrusion 20 wiring patterns 20a wiring 20b One end 20c Other end 20d First through hole 20e end 20f Second through hole 21 Wiring board 22-24 First cushion to third cushion 25 frames 30 Fourth elastic deformation section 31 4th fixed part

Claims

1. A movable part that allows the entire surface to be displaced in the vertical direction relative to the entire surface, Multiple fixing parts are arranged corresponding to the four sides of the movable part, A plurality of elastically deformable parts that connect the movable part and the plurality of fixed parts, A diaphragm equipped with a diaphragm.

2. The diaphragm according to claim 1, wherein the plurality of elastically deformable parts displace the movable part parallel to the plurality of fixed parts.

3. The diaphragm according to claim 1, wherein the plurality of elastically deformable parts have a rigidity such that they do not deform due to the weight of the movable part when the movable part is not in operation, and have a rigidity lower than the rigidity of the movable part when the movable part is in operation.

4. The diaphragm according to claim 1, wherein the plurality of elastic deformation portions arranged facing each other in one direction and the plurality of elastic deformation portions arranged facing each other in the other direction have different shapes.

5. The diaphragm according to claim 1, wherein the plurality of fixing parts are sandwiched and fixed between a pair of cases.

6. The diaphragm according to claim 5, wherein a connecting portion is provided on one of the four sides of the movable portion, extending toward the fixed portion side corresponding to that side.

7. The diaphragm according to claim 6, wherein the plurality of elastically deformable portions are provided on one side of the movable portion from which the connecting portion extends, avoiding the connecting portion.

8. A speaker comprising the diaphragm described in claim 1.

9. The speaker according to claim 8, wherein the multiple fixing parts of the diaphragm are sandwiched and fixed between a pair of cases.

10. The speaker according to claim 9, wherein the plurality of fixing parts are sandwiched between the pair of cases with a cushion in between.

11. The speaker according to claim 9, wherein the pair of magnet plates have multiple magnetic poles magnetized in accordance with the wiring pattern provided on the movable part of the diaphragm.

12. An electronic device comprising the speaker described in claim 8.

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