Speaker and speaker manufacturing method

Abstract

The present invention has: an external connection part; a first vibration part including a first coil and a first wire connected to the first coil and the external connection part; a second vibration part including a second coil and a second wire connected to the second coil; a third wire integrated with the first wire or the second wire and electrically connected to the external connection part and the second wire; a frame supporting the first vibration part, the second vibration part, and the external connection part; a first connection piece provided to the external connection part and including a first terminal to which the first wire is electrically connected; and a second connection piece provided to the frame and including a second terminal to which the second wire is electrically connected and a third terminal to which the third wire is electrically connected.

Description

Speaker and speaker manufacturing method

[0001] The present disclosure relates to a speaker and a speaker manufacturing method.

[0002] Japanese Utility Model Laid-Open No. 62-161496 describes a coaxial speaker in which a woofer and a tweeter are arranged on the same center line, and respective terminals are connected by gold threads, wherein the voice coil of the woofer and the gold threads are directly connected.

[0003] In a speaker provided with two vibrating parts, for example, when electrically connecting wires from an external connection part to which an external speaker cable or the like is connected to the respective vibrating parts, a configuration in which the external connection part and each vibrating part are connected by separate wires complicates the manufacturing process.

[0004] An object of the present disclosure is to provide a speaker including a first vibrating part and a second vibrating part, the speaker being designed with consideration for the manufacturing process, and a method for manufacturing the speaker.

[0005] A first aspect provides a speaker comprising: a first vibrating part including an external connection part, a first coil, and a first wire connected to the first coil and the external connection part; a second vibrating part including a second coil and a second wire connected to the second coil; a third wire that is integral with the first wire or the second wire and is electrically connected to the external connection part and the second wire; a frame that supports the first vibrating part, the second vibrating part, and the external connection part; a first connection piece that is provided at the external connection part and includes a first terminal to which the first wire is electrically connected; and a second connection piece that is provided on the frame and includes a second terminal to which the second wire is electrically connected and a third terminal to which the third wire is electrically connected.

[0006] In the first aspect, the first coil and the external connection part are electrically connected by the first wire, so that an electrical signal can be applied from the external connection part to the first coil. Further, the second coil and the external connection part are electrically connected by the third wire and the second wire, so that an electrical signal can be applied from the external connection part to the second vibrating part.

[0007] The third wire is integrated with either the first or second wire. For example, the first wire may extend beyond the external connection point, with the extended portion becoming the third wire. This means that in the manufacturing process, it is only necessary to connect the third wire, which is the extension of the first wire, to the second wire, eliminating the need to prepare a separate third wire and connect it to the external connection point and the second wire. In other words, the first embodiment is a speaker that takes the manufacturing process into consideration.

[0008] Alternatively, the second wire may be extended, with the extended portion becoming the third wire.

[0009] Since the third wire is integrated with the first or second wire, the number of parts can be reduced compared to a configuration where the third wire is separate from the first and second wires.

[0010] Furthermore, the first embodiment includes a frame that supports a first vibrating section, a second vibrating section, and an external connection section.

[0011] In this way, the first vibrating part, the second vibrating part, and the external connection part are supported by the frame, making manufacturing easier and resulting in a speaker that takes the manufacturing process into consideration.

[0012] Furthermore, the first embodiment includes a first connecting piece and a second connecting piece. The first connecting piece is provided on the external connection portion and has a first terminal to which the first wire is electrically connected. The second connecting piece is provided on the frame and has a second terminal to which the second wire is electrically connected and a third terminal to which the third wire is electrically connected.

[0013] Therefore, the first wire can be electrically connected to the external connection part using the first terminal provided on the first connecting piece of the external connection part. In addition, the second wire and the third wire can be electrically connected to the second and third terminals provided on the second connecting piece of the frame, respectively.

[0014] In the second embodiment, the second terminal and the third terminal of the second connecting piece are arranged at a distance from each other, as in the first embodiment.

[0015] In the second embodiment, when there is a time difference between soldering the second wire to the second terminal and soldering the third wire to the third terminal, heat transfer to the previously soldered area during the later soldering can be suppressed.

[0016] The third embodiment has a first support piece provided on the frame and supporting the intermediate portion of the first wire, in the first or second embodiment.

[0017] In the third embodiment, the first wire can be routed to a desired position by supporting the middle portion of the first wire with the first support piece.

[0018] The fourth embodiment, in any one embodiment of the first to third embodiments, has a second support piece provided on the frame and supporting the intermediate portion of the third wire.

[0019] In the fourth embodiment, the third wire can be routed to a desired position by supporting the middle portion of the third wire with the second support piece.

[0020] In the fifth embodiment, the intermediate portion of the third wire is supported by the second support piece and bent at an acute angle, as in the fourth embodiment.

[0021] In the fifth embodiment, it becomes easier to maintain the third wire in a shape suitable for connecting the external connection part and the second wire.

[0022] The sixth embodiment is one of the first to fifth embodiments in which the first wires are provided in pairs, and the third wires are provided in pairs with a wider spacing than the pair of first wires.

[0023] In the sixth embodiment, the occurrence of short circuits due to contact between the third wires can be suppressed.

[0024] The seventh embodiment is one of the first to sixth embodiments in which the second vibrating part is superimposed on the first vibrating part.

[0025] In the seventh embodiment, the speaker can be made smaller by overlapping the first vibrating part and the second vibrating part.

[0026] The eighth aspect is a speaker manufacturing method for manufacturing a speaker having a first vibrating section comprising an external connection section, a first coil, and a first wire connected to the first coil and the external connection section, and a second vibrating section comprising a second coil and a second wire connected to the second coil, wherein a third wire extending from the first wire beyond the external connection section is electrically connected to the second wire.

[0027] In the eighth embodiment, the third wire is connected to the second wire. Since the third wire is an extension of the first wire beyond the external connection point, in the manufacturing process, it is sufficient to connect the third wire, which is the extension of the first wire, to the second wire, and there is no need to prepare a new third wire and connect it to the external connection point and the second wire. In other words, the eighth embodiment is a speaker manufacturing method that takes the manufacturing process into consideration.

[0028] According to this disclosure, it is possible to provide a speaker comprising a first vibrating part and a second vibrating part, which is designed with consideration for the manufacturing process, and a method for manufacturing this speaker.

[0029] Figure 1 is a cross-sectional view showing the speaker of the first embodiment. Figure 2 is an enlarged cross-sectional view showing the speaker of the first embodiment. Figure 3 is a cross-sectional view showing the magnetic circuit of the speaker of the first embodiment. Figure 4 is a cross-sectional view showing the speaker of the first embodiment in the process of being manufactured. Figure 5 is a partially enlarged broken perspective view showing the speaker of the first embodiment. Figure 6 is a partially plan view showing the speaker of the first embodiment.

[0030] A first embodiment of the speaker according to this disclosure will be described with reference to Figures 1 to 3.

[0031] Figure 1 is a cross-sectional view of the speaker 10 according to the first embodiment, in a plane passing through the central axis AX. The speaker 10 is mounted, for example, on the side door of an automobile.

[0032] The speaker 10 has a structure that is axially symmetric with respect to the central axis AX in its main part. In the following description, the direction parallel to the central axis AX is called the axial direction, one side of the axial direction is called the upper side, and the other side of the axial direction is called the lower side. The direction perpendicular to the central axis AX is called the radial direction, the side of the radial direction that approaches the central axis AX is called the radially inner side, and the side of the radial direction that moves away from the central axis AX is called the radially outer side.

[0033] The speaker 10 has a first vibrating part 20, a second vibrating part 30, a magnetic circuit 40, a frame 50, and a connector 60. The first vibrating part 20 is the part that vibrates to produce sound. The second vibrating part 30 is the part that vibrates to cancel out the vibration of the entire speaker 10 caused by the first vibrating part 20. The frame 50 supports the first vibrating part 20, the second vibrating part 30, the magnetic circuit 40, and the connector 60. The connector 60 is attached to the frame 50. The connector 60 is an example of an external connection part.

[0034] (First vibrating section 20) The first vibrating section 20 includes a first bobbin 21, a first coil 22, a diaphragm 24, an edge 25, a cap 26, a first elastic support section 27, a first wire 121, and a third wire 123. The first bobbin 21 has a cylindrical shape. The first coil 22 is formed on the outer circumferential surface side of the lower end of the first bobbin 21.

[0035] The diaphragm 24 is a component that radiates sound by vibrating. The diaphragm 24 has a circular hole in its center. The diaphragm 24 has a shape that extends radially outward and upward from the inner edge that forms this circular hole. The inner edge of the diaphragm 24 is joined to the outer surface of the first bobbin 21. The outer edge of the diaphragm 24 is connected to the frame 50 via an edge 25. The edge 25 is made of rubber. The inner edge of the edge 25 is joined to the outer edge of the diaphragm 24, and the outer edge of the edge 25 is joined to the frame 50.

[0036] The cap 26 is a component that emits sound by vibrating. The cap 26 covers the first bobbin 21 from above. The outer edge of the cap 26 is joined to the upper surface of the diaphragm 24.

[0037] The first elastic support portion 27 elastically supports the first bobbin 21 so that it can be displaced in the axial direction. The first elastic support portion 27 is provided on the radially outer side of the first bobbin 21.

[0038] The first elastic support portion 27 has a single elastic body 27a. The elastic body 27a has a circular hole in the center. The elastic body 27a has an annular disc shape that extends radially outward from the inner edge forming the circular hole. The elastic body 27a is made of cloth. The inner edge of the elastic body 27a is joined to the first bobbin 21. The outer edge of the elastic body 27a is joined to the frame 50.

[0039] As shown in Figure 2, the elastic body 27a has an inner edge portion 27a1 that is joined to the outer circumferential surface of the first bobbin 21, a corrugated portion 27a2 having a plurality of wave shapes arranged in the radial direction, and an outer edge portion 27a3 that is joined to the frame 50. Here, the plurality of wave shapes refer to a shape in which a wave shape that is convex upward and a wave shape that is convex downward are alternately repeated along the radial direction.

[0040] In this embodiment, the first wire 121 and the third wire 123 are configured as a single conductor. Specifically, as shown in Figure 5, one end of the first wire 121 is electrically connected to the first coil 22 via the first bobbin 21, and the other end is electrically connected to the first terminal 101A of the first connecting piece 101 via the first support piece 111, which will be described later. One end of the third wire 123 is electrically connected to the first terminal 101A, and the other end is electrically connected to the third terminal 102B of the second connecting piece 102 via the second support piece 112, which will be described later. The other end of the first wire 121 and one end of the third wire 123 are continuous. If we consider the first wire 121 as the reference, it can also be said that the other end of the first wire 121 extends beyond the connector 60, and the extended portion is the third wire 123. As shown in Figure 6, the first wires 121 are arranged in pairs and are arranged symmetrically with respect to a predetermined reference plane RP that includes the central axis AX. Similarly, the third wire 123 is also arranged in pairs and is positioned symmetrically with respect to a predetermined reference plane RP which includes the central axis AX.

[0041] The material of the first wire 121 and the third wire 123 is not limited, and for example, a copper foil thread conductor (so-called tinsel wire) can be used. The copper foil thread conductor has high conductivity required for the speaker 10 of the disclosed technology and high flexibility to follow the vibration of the first coil 22.

[0042] (Second vibrating portion 30) The second vibrating portion 30 includes a second bobbin 31, a second coil 32, a second elastic support portion 37, and a second wire 132. The second bobbin 31 has a cylindrical shape. The diameter of the second bobbin 31 is larger than that of the first bobbin 21. The second coil 32 is formed on the outer peripheral surface side at the lower end portion of the second bobbin 31. In the non-operating state shown in FIG. 1 (that is, the state where the speaker 10 is not operating), the upper end of the second bobbin 31 is located above the lower end of the first coil 22.

[0043] The second elastic support portion 37 elastically supports the second bobbin 31 so as to be displaceable in the axial direction. The second elastic support portion 37 is provided radially outward of the second bobbin 31.

[0044] The second elastic support portion 37 includes an upper elastic body 38a, a lower elastic body 38b, and a second coupler 39.

[0045] The upper elastic body 38a and the lower elastic body 38b are provided with an axial interval therebetween. The lower elastic body 38b is provided below the upper elastic body 38a. Both the upper elastic body 38a and the lower elastic body 38b have a circular hole at the center. Both the upper elastic body 38a and the lower elastic body 38b are elastic bodies extending radially outward from inner edge portions forming these circular holes.

[0046] The inner edge portion of the second elastic support portion 37 is joined to the second bobbin 31. Specifically, the inner edge portions of the upper elastic body 38a and the lower elastic body 38b are joined to the second coupler 39. The second coupler 39 is joined to the outer peripheral surface of the second bobbin 31. Thereby, the second coupler 39 connects the second bobbin 31 and the upper elastic body 38a, and also connects the second bobbin 31 and the lower elastic body 38b.

[0047] The upper elastic body 38a is formed of cloth. As shown in FIG. 2, the upper elastic body 38a includes an inner edge portion 38a1 joined to the second coupler 39, a corrugated portion 38a2 having a plurality of radially aligned wave shapes, and an outer edge portion 38a3 joined to the frame 50.

[0048] The lower elastic body 38b is formed of rubber. The lower elastic body 38b includes an inner edge portion 38b1 joined to the second coupler 39, a semicircular portion 38b2 having a substantially semicircular cross-sectional shape convex downward, and an outer edge portion 38b3 joined to the frame 50.

[0049] As described above, the upper elastic body 38a is formed of cloth, and the lower elastic body 38b is formed of rubber. Therefore, the elastic characteristics of the upper elastic body 38a are different from the elastic characteristics of the lower elastic body 38b. In the present embodiment, by combining the upper elastic body 38a and the lower elastic body 38b having different elastic characteristics in this way, the overall elastic characteristics of the second elastic support portion 37 are approximated to the combined elastic characteristics of the first elastic support portion 27 and the edge 25. The combination of the first elastic support portion 27 and the edge 25 provides the elastic characteristics for the first vibrating portion 20, and the second elastic support portion 37 provides the elastic characteristics for the second vibrating portion 30. That is, the vibration characteristics of the first vibrating portion 20 and the second vibrating portion 30 (more specifically, the resonance frequencies of the first vibrating portion 20 and the second vibrating portion 30) are approximated, so that characteristic changes over time proceed in the same manner. This can suppress a decrease in the performance of the second vibrating portion 30 (that is, the function of canceling out the vibration of the entire speaker 10 caused by the first vibrating portion 20).

[0050] The second coupler 39 includes an inner edge portion 39a joined to the second bobbin 31, an upper joining portion 39c joined to the upper elastic body 38a, a lower joining portion 39e joined to the lower elastic body 38b, a first connecting portion 39b connecting the inner edge portion 39a and the upper joining portion 39c, and a second connecting portion 39d connecting the upper joining portion 39c and the lower joining portion 39e.

[0051] The inner edge portion 39a has a shape inclined downward toward the radially inner side. The inner edge portion 39a is joined to the second bobbin 31 by an adhesive or the like not shown.

[0052] The upper joint portion 39c has a cylindrical shape that extends parallel to the axial direction. In other words, the thickness direction of the upper joint portion 39c is oriented radially. The outer circumferential surface of the upper joint portion 39c is joined to the upper elastic body 38a.

[0053] The lower joint portion 39e is located radially outward and below the upper joint portion 39c. The thickness direction of the lower joint portion 39e is oriented axially. The upper surface of the lower joint portion 39e is joined to the lower elastic body 38b.

[0054] The first connecting portion 39b connects the outer edge of the inner edge portion 39a and the lower end of the upper connecting portion 39c in the radial direction. The thickness direction of the first connecting portion 39b is oriented in the axial direction.

[0055] The second connecting portion 39d connects the lower end of the upper connecting portion 39c to the inner edge of the lower connecting portion 39e. The second connecting portion 39d has a shape that slopes downward toward the radially outward direction.

[0056] Furthermore, the second coupler 39 may have a ventilation hole 72 that penetrates through the second coupler 39 in the thickness direction. This ventilation hole 72 can be formed, for example, in the first connection portion 39b or the second connection portion 39d.

[0057] The outer edge of the second elastic support portion 37 is joined to the frame 50. Specifically, the outer edge 38a3 of the upper elastic body 38a is joined to the frame 50, and the outer edge 38b3 of the lower elastic body 38b is joined to the frame 50.

[0058] The second coupler 39 is, for example, a resin molded product and is a component that is less prone to deformation than the upper elastic body 38a and the lower elastic body 38b. Even if the second bobbin 31 is displaced in the axial direction, the relative positional relationship between the second bobbin 31, the second coil 32, and the second coupler 39 does not fundamentally change.

[0059] In both the initial position of the second bobbin 31 (see Figure 2) and the displaced state of the second bobbin 31 (not shown), the upper joint portion 39c of the second coupler 39 is located above the upper end of the second coil 32. Therefore, in both of the above states, the inner edge portion 38a1 of the upper elastic body 38a is located above the upper end of the second coil 32.

[0060] In both the initial position of the second bobbin 31 and the displaced state of the second bobbin 31, the lower joint portion 39e of the second coupler 39 is located below the upper end of the second coil 32. Therefore, in both of the above states, the inner edge portion 38b1 of the lower elastic body 38b is located below the upper end of the second coil 32.

[0061] The second wire 132 is electrically connected at one end to the second coil 32 via the second bobbin 31, and at the other end to the second terminal 102A of the second connecting piece 102, which will be described later. In this embodiment, a portion of the second wire 132 is embedded in the upper elastic body 38a, and its shape is maintained along the upper surface of the upper elastic body 38a. That is, the second wire 132 is structured so that it does not separate from the upper elastic body 38a and protrude upward.

[0062] A portion of the second wire 132 penetrates the second frame 50B, which will be described later. That is, the portion that penetrates the second frame 50B and protrudes radially outward from the second frame 50B is electrically connected to the second terminal 102A. As shown in Figure 6, the second wires 132 are arranged in pairs and are symmetrical with respect to the reference plane RP.

[0063] (Magnetic Circuit 40) As shown in Figure 3, the magnetic circuit 40 comprises a first magnetic member 41, a first magnet 42, a second magnetic member 43, a third magnetic member 44, a second magnet 45, and a fourth magnetic member 46. These magnetic members 41, 43, 44, and 46 and the magnets 42 and 45 are joined together by an adhesive or the like. Furthermore, the second magnetic member 43 and the third magnetic member 44 are in contact with each other on their opposing surfaces. A screw 47 is screwed into a recess 43e formed on the lower surface side of the second magnetic member 43, thereby fixing the second magnetic member 43 and the third magnetic member 44 together. The screw 47 is made of a non-magnetic material and is not attracted to magnetic materials such as the second magnetic member 43 and the third magnetic member 44. This makes it easy to assemble the speaker 10.

[0064] The magnetic circuit 40 has a first magnetic gap G1 and a second magnetic gap G2. Both the first magnetic gap G1 and the second magnetic gap G2 are open to the upper side. The second magnetic gap G2 is located radially outward from the first magnetic gap G1.

[0065] The magnetic circuit 40 is composed of a first magnetic circuit 40A having a first magnetic gap G1 and a second magnetic circuit 40B having a second magnetic gap G2. The first magnetic circuit 40A has a first magnetic member 41, a first magnet 42, and a second magnetic member 43. The second magnetic circuit 40B has a third magnetic member 44, a second magnet 45, and a fourth magnetic member 46. The second magnetic member 43 and the third magnetic member 44 are fixed together by screws 47, forming the abutment surfaces of the first magnetic circuit 40A and the second magnetic circuit 40B.

[0066] As shown in Figure 3, the fourth magnetic member 46 has a bottom wall portion 46a, a cylindrical wall portion 46b that rises upward from the outer edge of the bottom wall portion 46a, and a mounting portion 46d that is attached to the frame 50. The inner circumferential surface of the cylindrical wall portion 46b has the outer forming surface G2b of the second magnetic gap G2. The bottom wall portion 46a has a through hole in the center. The mounting portion 46d protrudes radially outward from near the lower end of the cylindrical wall portion 46b.

[0067] The second magnet 45 is positioned on the upper surface of the bottom wall portion 46a of the fourth magnetic member 46. The second magnet 45 is an annular magnet. The inner diameter of the annular second magnet 45 is smaller than the inner diameter of the bottom wall portion 46a, which has a through hole in the center.

[0068] The third magnetic member 44 has a bottom wall portion 44a and a cylindrical wall portion 44b that rises upward from the outer edge of the bottom wall portion 44a. The outer circumferential surface of the cylindrical wall portion 44b has an inner forming surface G2a of the second magnetic gap G2. The bottom wall portion 44a has a through hole in the center. The inner diameter of the bottom wall portion 44a is smaller than the inner diameter of the second magnet 45. Hereinafter, the third magnetic member 44 may be referred to as the inner magnetic member 44.

[0069] The second magnetic member 43 has a bottom wall portion 43a, a cylindrical wall portion 43b that rises upward from the outer edge of the bottom wall portion 43a, a protrusion 43c that projects upward from the center of the bottom wall portion 43a, and a mounting portion 43d that is attached to the frame 50.

[0070] The inner circumferential surface of the cylindrical wall portion 43b has an outer forming surface G1b of the first magnetic gap G1. The mounting portion 43d protrudes radially outward from near the upper end of the cylindrical wall portion 43b.

[0071] The first magnet 42 is positioned on the upper surface of the protrusion 43c of the second magnetic member 43. The first magnet 42 is cylindrical in shape.

[0072] The first magnetic member 41 is positioned on the upper surface of the first magnet 42. The first magnetic member 41 is substantially cylindrical in shape. The outer circumferential surface of the first magnetic member 41 has an inner forming surface G1a of the first magnetic gap G1.

[0073] Specifically, the first magnetic member 41 has a substantially cylindrical main body portion 41a and a covering portion 41b that covers the main body portion 41a. The covering portion 41b covers a part of the upper surface and the outer circumferential surface of the main body portion 41a. The covering portion 41b functions as the inner forming surface G1a of the first magnetic gap G1.

[0074] (Frame 50) As shown in Figure 1, the frame 50 has a first bottom wall portion 51, a second bottom wall portion 52, a third bottom wall portion 53, a fourth bottom wall portion 54, and a magnetic circuit support portion 55.

[0075] The first bottom wall portion 51 is located above the second bottom wall portion 52. The second bottom wall portion 52 is located above the third bottom wall portion 53. The third bottom wall portion 53 is located above the fourth bottom wall portion 54. The fourth bottom wall portion 54 is located above the magnetic circuit support portion 55.

[0076] The first bottom wall portion 51 supports the outer edge of the edge 25. The second bottom wall portion 52 supports the outer edge of the elastic body 27a of the first elastic support portion 27. The third bottom wall portion 53 supports the outer edge of the upper elastic body 38a of the second elastic support portion 37. The fourth bottom wall portion 54 supports the outer edge of the lower elastic body 38b of the second elastic support portion 37. The magnetic circuit support portion 55 supports the magnetic circuit 40. Hereinafter, the second bottom wall portion 52 may be referred to as the first mounting portion 52, and the third bottom wall portion 53 and the fourth bottom wall portion 54 may be referred to as the second mounting portions 53 and 54.

[0077] The first bottom wall portion 51, the second bottom wall portion 52, the third bottom wall portion 53, and the fourth bottom wall portion 54 each support the respective object to be supported (e.g., the edge 25) on their upper surfaces. The magnetic circuit support portion 55 is mechanically fixed to the magnetic circuit 40.

[0078] The outer edge of the edge 25 is located radially outward from the outer edge of the elastic body 27a of the first elastic support portion 27.

[0079] As shown in Figure 2, the outer edge 38a3 of the upper elastic body 38a of the second elastic support portion 37 is located radially outward from the outer edge 38b3 of the lower elastic body 38b of the second elastic support portion 37. The outer edge 38b3 of the lower elastic body 38b of the second elastic support portion 37 is located radially outward from the mounting portion 46d of the magnetic circuit 40.

[0080] The frame 50 has a first connecting portion 56, a second connecting portion 57, a third connecting portion 58, and a fourth connecting portion 59.

[0081] The first connection part 56 connects the first bottom wall part 51 and the second bottom wall part 52. The second connection part 57 connects the second bottom wall part 52 and the third bottom wall part 53. The third connection part 58 connects the third bottom wall part 53 and the fourth bottom wall part 54. The fourth connection part 59 connects the fourth bottom wall part 54 and the magnetic circuit support part 55.

[0082] The first connecting portion 56 has a first vertical wall 56a extending parallel to the axial direction, a first inclined wall 56b that is inclined with respect to the axial direction, and a first vertical wall 56c extending parallel to the axial direction.

[0083] As shown in Figure 2, the second connecting portion 57 has a second vertical wall 57a extending parallel to the axial direction, a second radial wall 57b extending radially outward, a second inclined wall 57c inclined with respect to the axial direction, and a second vertical wall 57d extending parallel to the axial direction.

[0084] The third connecting portion 58 has a third inclined wall 58a that is inclined with respect to the axial direction.

[0085] The fourth connecting portion 59 has a fourth inclined wall 59a that is inclined with respect to the axial direction and a fourth bottom wall 59b that is perpendicular to the axial direction.

[0086] The frame 50 comprises a first frame 50A, a second frame 50B, and a connecting frame 50C. The first frame 50A, the second frame 50B, and the connecting frame 50C are molded (for example, by resin molding) as separate parts from each other.

[0087] The first frame 50A has a first bottom wall portion 51, a first connecting portion 56, and a second bottom wall portion 52. As shown in Figure 2, the first frame 50A has a magnetic circuit mounting portion 50A2 that supports the magnetic circuit 40, and a connecting portion 50A1 that connects the magnetic circuit mounting portion 50A2 and the second bottom wall portion 52. The connecting portion 50A1 has a shape that is inclined radially inward toward the axial downward side. The magnetic circuit mounting portion 50A2 is located radially inward from the second bottom wall portion 52.

[0088] The second frame 50B has a third bottom wall portion 53, a third connecting portion 58, a fourth bottom wall portion 54, a fourth connecting portion 59, and a magnetic circuit support portion 55. The connecting frame 50C has a second connecting portion 57.

[0089] A gap 80 is provided at the connection point between the first frame 50A and the connecting frame 50C. This gap 80 is filled with an adhesive (not shown) when the first frame 50A and the connecting frame 50C are connected. This configuration allows the frames 50A, 50B, and 50C to be joined together while ensuring that the first magnetic circuit 40A and the second magnetic circuit 40B are in contact in the vertical direction.

[0090] Ventilation holes 71 are formed in the first connection portion 56. Multiple ventilation holes 71 are provided arranged in the circumferential direction. Specifically, the ventilation holes 71 are provided in the first inclined wall 56b. In this embodiment, in the connecting frame 50C, the connection position 50CA with the first frame 50A is formed radially inward than the connection position 50CB with the second frame 50B. This ensures a wide opening cross-sectional area of ​​the ventilation holes 71, and a structure is realized that allows for a wide airflow path.

[0091] On the other hand, ventilation holes are not formed in the third connection portion 58 and the fourth connection portion 59 of the second frame 50B. This prevents water and other substances from entering the second frame 50B.

[0092] Although not shown in the diagram, ventilation holes are formed in the connecting portion 50A1. Multiple ventilation holes are provided arranged in the circumferential direction. As a result, the space below the first elastic support portion 27 within the first frame 50A and the space within the second frame 50B are in communication.

[0093] The connecting portion 50A1 is formed to be thinner than the first vertical wall 56a. This suppresses interference with the second bobbin 31. In the completed state of the speaker 10, the first magnetic circuit 40A is supported not only by the first frame 50A but also by the second frame 50B via the second magnetic circuit 40B. This makes it possible to form the first vertical wall 56a thin and to form a large number of ventilation holes in the first vertical wall 56a.

[0094] A cylindrical cover 50V extending downward is formed on the outer circumference of the first frame 50A. The second frame 50B, the connecting frame 50C, and the members supported by these frames are arranged radially inside the cover 50V. In other words, the presence of the cover 50V around the second frame 50B, the connecting frame 50C, and the members supported by these frames prevents liquids such as water from entering and coming into contact with these members from the outside.

[0095] As shown in Figures 5 and 6, a first support piece 111 and a second support piece 112 are provided on the inner circumferential surface of the first frame 50A. The first support piece 111 supports the intermediate portion of the first wire 121, that is, the portion between the end electrically connected to the first coil 22 and the other end electrically connected to the first terminal 101A.

[0096] The first support piece 111 has a support hole 111A at one end and a support hole 111B at the other end. Tracing the first wire 121 from one end, it is first inserted through the support hole 111A at one end from above downwards, and then inserted through the support hole 111B at the other end from below upwards. By being inserted through the support hole 111A at one end, the first wire 121 is maintained in a roughly L-shaped form. This makes the first wire 121 more efficient at absorbing vibrations from the first coil 22.

[0097] The second support piece 112 has a support hole 112C through which the third wire 123 is inserted. Tracing the third wire 123 from one end, it is inserted into the support hole 112C from top to bottom. As a result, the third wire 123 is maintained in a shape that is sharply bent in the portion supported by the second support piece 112. The third wire 123 extends substantially horizontally from one end to the portion supported by the second support piece 112, and is maintained in a state that extends downward from the second support piece 112 to the other end.

[0098] A second connecting piece 102 is attached to the outer circumferential surface of the second frame 50B. The second connecting pieces 102 are provided in pairs, symmetrically with respect to the reference plane RP.

[0099] The second connecting piece 102 is made of metal and is electrically conductive. As shown in Figure 6, the second connecting piece 102 is provided with a second terminal 102A and a third terminal 102B. The second terminal 102A is the terminal to which the other end of the second wire 132 is electrically connected. The third terminal 102B is the terminal to which the other end of the third wire 123 is electrically connected. As a result, the second wire 132 and the third wire 123 are electrically connected via the second connecting piece 102.

[0100] In each of the second connecting pieces 102, the third terminal 102B is located further from the reference plane RP than the second terminal 102A. Therefore, the spacing of the third wires 123 is kept wider than the spacing of the first wires 121 and the spacing of the second wires 132, so that the other end of the third wire 123 is electrically connected to the third terminal 102B.

[0101] (Connector 60) A connector 60 is attached to the frame 50. In this embodiment, the connector 60 protrudes radially inward and radially outward from the frame 50. In the connector 60, a socket 62 is provided in the portion that protrudes radially outward from the frame 50. For example, a plug of a speaker cable that sends electronic signals to the speaker 10 can be electrically and physically connected to the socket 62.

[0102] In the connector 60, a first connecting piece 101 is attached to the portion of the frame 50 that protrudes radially inward. The first connecting piece 101 is electrically connected to the plug connected to the socket 62.

[0103] The first connecting piece 101 is provided with a first terminal 101A. The first terminal 101A is a terminal to which the middle portion of the first wire 121 is electrically connected by soldering or the like.

[0104] As shown in Figure 6, the second support piece 112 is positioned further from the reference plane RP than the first terminal 101A. Therefore, tracing the pair of third wires 123 from the position of the first terminal 101A, they extend toward the second support piece 112 in a direction away from each other. The pair of third wires 123 maintain a relative position separated from each other at the position of the second support piece 112, while maintaining the posture of extending toward the third terminal 102B.

[0105] Next, the manufacturing method of the speaker 10 of this embodiment will be described.

[0106] The manufacturing method for speaker 10 includes a first component assembly step for assembling the first component 10A, a second component assembly step for assembling the second component 10B, and a connecting step for connecting the first component 10A and the second component 10B. In other words, in the manufacturing method of this embodiment, the first component 10A and the second component 10B are assembled separately and then joined together. As a result, the first component 10A and the second component 10B can be assembled on separate lines, making speaker 10 a speaker that takes the manufacturing process into consideration.

[0107] In this embodiment, the first wire 121 and the third wire 123 are integrated. More specifically, the first wire 121 is extended at the other end, and the extended portion is configured as the third wire 123.

[0108] Here, as a comparative example, we consider a speaker in which the first wire 121 and the third wire 123 are separate components. In the speaker of the comparative example, after connecting the first component 10A and the second component 10B, one end of the third wire 123 is further connected to the first terminal 101A of the connector 60, and the other end of the third wire 123 is connected to the third terminal 102B of the second connecting piece 102.

[0109] In contrast, in the speaker 10 of this embodiment, the first wire 121 and the third wire 123 are integrated. This ensures that when the first component 10A and the second component 10B are connected, one end of the third wire 123 is connected to the first terminal 101A of the connector 60. Therefore, it is sufficient to connect the other end of the third wire 123 to the third terminal 102B of the second connecting piece 102, and in this respect as well, the speaker 10 is a speaker that takes the manufacturing process into consideration.

[0110] <Effects> Next, the effects of this embodiment will be described.

[0111] In this embodiment, as described above, the first wire 121 and the third wire 123 are integrated. Therefore, the speaker 10 is designed with consideration for the manufacturing process.

[0112] In this embodiment, a frame 50 is included. The frame 50 supports the first vibrating section 20, the second vibrating section 30, and the connector 60. Therefore, compared to a configuration in which the first vibrating section 20, the second vibrating section 30, and the connector are not supported by the frame 50, the speaker 10 is easier to manufacture and the manufacturing process is taken into consideration.

[0113] In this embodiment, the first vibrating section 20 has a first wire 121, and the second vibrating section 30 has a second wire 132. The third wire 123, which is connected to the connector 60 (first terminal 101A) via the second wire 132, is formed from an extended portion of the first wire 121. In other words, the configuration with the third wire 123 realizes a structure for the speaker 10 that takes the manufacturing process into consideration.

[0114] In this embodiment, the first connecting piece 101 of the frame 50 is provided with a first terminal 101A. The first wire 121 can be connected to the connector 60 using this first terminal 101A. In addition, in this embodiment, the second connecting piece 102 of the frame 50 is provided with a second terminal 102A and a third terminal 102B. The second wire 132 can be electrically connected using the second terminal 102A, and the third wire 123 can be electrically connected using the third terminal 102B. This makes it possible to achieve electrical conductivity between the second wire 132 and the third wire 123 via the second connecting piece 102.

[0115] In the second connecting piece 102, the second terminal 102A and the third terminal 102B are positioned at a distance from each other. That is, heat is less likely to transfer from the position of the second terminal 102A to the position of the third terminal 102B. In the manufacturing process of the speaker 10, there may be a time difference between the soldering of the second wire 132 to the second terminal 102A and the soldering of the third wire 123 to the third terminal 102B. In this case, the heat from the later soldering is less likely to transfer to the terminal that was soldered earlier, thus maintaining the soldered connection.

[0116] In contrast, the second connecting piece 102 may be configured such that the second terminal 102A and the third terminal 102B are not separated but are located at the same position. That is, the second connecting piece 102 is formed by integrating the second terminal 102A and the third terminal 102B. In this configuration, the second connecting piece 102 can be made smaller.

[0117] In this embodiment, a first support piece 111 is provided on the frame 50. The first support piece 111 can support the intermediate portion of the first wire 121. For example, it is possible to route the first wire 121 to a desired position or maintain it in a desired shape.

[0118] In this embodiment, a second support piece 112 is provided on the frame 50. The second support piece 112 can support the middle portion of the third wire 123. For example, it is possible to route the third wire 123 to a desired position or maintain it in a desired shape.

[0119] In this embodiment, the middle portion of the third wire 123 is supported by the second support piece 112 and is bent at an acute angle so that the other end faces the third terminal 102B. This makes it easier to connect the third wire 123 to the third terminal 102B when connecting the first component 10A and the second component 10B, and realizes a structure for the speaker 10 that takes the manufacturing process into consideration.

[0120] In this embodiment, the first wires 121 are provided in pairs. The third wires 123 are also provided in pairs, and the spacing between the third wires 123 is wider than the spacing between the first wires 121 and the spacing between the second wires 132. This suppresses the occurrence of short circuits due to contact between the third wires 123.

[0121] In this embodiment, the first vibrating section 20 and the second vibrating section 30 are arranged in an axial direction. This allows for miniaturization of the speaker 10.

[0122] The first vibrating section 20 is a drive unit for producing sound, and the second vibrating section 30 is a drive unit for canceling out the vibration of the entire speaker 10 caused by the first vibrating section 20. Therefore, the vibration of the entire speaker 10 can be suppressed.

[0123] In this embodiment, as shown in Figure 1, the lower surface of the magnetic circuit 40 is exposed and not covered by the frame 50. This allows the speaker 10 to be miniaturized in the axial direction.

[0124] In particular, in this embodiment, the speaker 10 may be mounted in the side door of an automobile with its lower surface (downward in the axial direction) facing outwards. Therefore, to prevent water from accumulating in the recess formed on the lower surface (downward in the axial direction) of the magnetic circuit 40, the recess is shaped so that its diameter gradually widens towards the bottom. This makes it easier for water that enters the recess to drain. Specifically, the recess 43e formed on the lower surface of the second magnetic member 43, the through hole formed in the center of the bottom wall portion 44a, the through hole of the annular magnet second magnet 45, and the through hole formed in the center of the bottom wall portion 46a are formed so that their diameters increase in this order.

[0125] [Supplementary Explanation] Although preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments.

[0126] For example, in the above embodiment, a structure was illustrated in which a part of the second wire 132 is embedded in the upper elastic body 38a and does not separate upward from the upper elastic body 38a. However, the second wire 132 may also be in a structure in which it protrudes without being embedded in the upper elastic body 38a. In a structure in which the second wire 132 does not protrude upward from the upper elastic body 38a, the diaphragm 24 does not come into contact with the second wire 132 even when it vibrates. Since the diaphragm 24 and the upper elastic body 38a can be positioned close together in the axial direction, the speaker 10 can be made smaller in the axial direction.

[0127] In contrast, even if the second wire 132 is structured to protrude without being embedded in the upper elastic body 38a, contact between the diaphragm 24 and the upper elastic body 38a during vibration can be suppressed by arranging them at an axial distance from each other.

[0128] In the above embodiment, a structure is illustrated in which the second terminal 102A and the third terminal 102B of the second connecting piece 102 protrude radially outward from the second frame 50B. This makes it easier to connect the other end of the third wire 123 to the third terminal 102B, as this is done radially outward from the second frame 50B. In contrast, for example, in a structure in which there is a wide axial gap between the diaphragm 24 and the upper elastic body 38a, the third terminal 102B may be formed facing upward, and the other end of the third wire 123 may be connected to the third terminal 102B by appropriately using the space between the first frame 50A and the second frame 50B.

[0129] In the above embodiment, the upper elastic body 38a is made of cloth and the lower elastic body 38b is made of rubber. However, the disclosure is not limited thereto. The upper elastic body 38a may be made of rubber and the lower elastic body 38b may be made of cloth. Also, both the upper elastic body 38a and the lower elastic body 38b may be made of cloth, or both may be made of rubber.

[0130] In the above embodiment, a configuration having a connector 60 is given as an example of an external connection part, but the external connection part is not limited to a connector 60. For example, instead of a connector 60, a connecting member having a first terminal 101A may be directly attached to the first frame 50A, and the speaker cable may be electrically connected to this connecting member via a plug, clip, etc., or by soldering, etc. As for the connecting member in this configuration, for example, a part of the first connecting piece 101 described above may be extended radially outward from the first frame 50A, and the speaker cable may be electrically connected to this extended portion.

Claims

1. A speaker comprising: an external connection part; a first vibrating part comprising a first coil and a first wire connected to the first coil and the external connection part; a second vibrating part comprising a second coil and a second wire connected to the second coil; a third wire integral with the first wire or the second wire and electrically connected to the external connection part and the second wire; a frame supporting the first vibrating part, the second vibrating part, and the external connection part; a first connecting piece provided on the external connection part and having a first terminal to which the first wire is electrically connected; and a second connecting piece provided on the frame and having a second terminal to which the second wire is electrically connected and a third terminal to which the third wire is electrically connected.

2. The speaker according to claim 1, wherein the second terminal and the third terminal of the second connecting piece are arranged at a distance from each other.

3. The speaker according to claim 1, further comprising a first support piece provided on the frame and supporting the intermediate portion of the first wire.

4. The speaker according to claim 1, further comprising a second support piece provided on the frame and supporting the intermediate portion of the third wire.

5. The speaker according to claim 4, wherein the intermediate portion of the third wire is supported by the second support piece and bent at an acute angle.

6. The speaker according to claim 1, wherein the first wires are provided in pairs, and the third wires are provided in pairs with a wider spacing than the pair of first wires.

7. The speaker according to claim 1, wherein the second vibrating part is arranged in superimposition with respect to the first vibrating part.

8. A speaker manufacturing method for manufacturing a speaker having an external connection part, a first vibrating part comprising a first coil and a first wire connected to the first coil and the external connection part, and a second vibrating part comprising a second coil and a second wire connected to the second coil, wherein a third wire extending from the first wire beyond the external connection part is electrically connected to the second wire.

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